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// Copyright (c) 2004-2011 Sergey Lyubka
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
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#define _XOPEN_SOURCE 600 // For flockfile() on Linux
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#define _LARGEFILE_SOURCE // Enable 64-bit file offsets
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#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
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#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX
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#if defined(__SYMBIAN32__)
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#define NO_SSL // SSL is not supported
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#define NO_CGI // CGI is not supported
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#define PATH_MAX FILENAME_MAX
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#endif // __SYMBIAN32__
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#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
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#include <sys/types.h>
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#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
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#define _WIN32_WINNT 0x0400 // To make it link in VS2005
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#define PATH_MAX MAX_PATH
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#define NO_CGI // WinCE has no pipes
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#define errno GetLastError()
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#define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
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#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
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((uint64_t)((uint32_t)(hi))) << 32))
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#define RATE_DIFF 10000000 // 100 nsecs
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#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
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#define SYS2UNIX_TIME(lo, hi) \
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(time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
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// Visual Studio 6 does not know __func__ or __FUNCTION__
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// The rest of MS compilers use __FUNCTION__, not C99 __func__
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// Also use _strtoui64 on modern M$ compilers
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#if defined(_MSC_VER) && _MSC_VER < 1300
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#define STR(x) STRX(x)
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#define __func__ "line " STR(__LINE__)
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#define strtoull(x, y, z) strtoul(x, y, z)
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#define strtoll(x, y, z) strtol(x, y, z)
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#define __func__ __FUNCTION__
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#define strtoull(x, y, z) _strtoui64(x, y, z)
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#define strtoll(x, y, z) _strtoi64(x, y, z)
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#define ERRNO GetLastError()
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#define SSL_LIB "ssleay32.dll"
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#define CRYPTO_LIB "libeay32.dll"
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#define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
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#if !defined(EWOULDBLOCK)
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#define EWOULDBLOCK WSAEWOULDBLOCK
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#endif // !EWOULDBLOCK
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#define INT64_FMT "I64d"
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#define WINCDECL __cdecl
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#define snprintf _snprintf
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#define vsnprintf _vsnprintf
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#define sleep(x) Sleep((x) * 1000)
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#define pipe(x) _pipe(x, BUFSIZ, _O_BINARY)
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#define popen(x, y) _popen(x, y)
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#define pclose(x) _pclose(x)
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#define close(x) _close(x)
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#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
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#define fseeko(x, y, z) fseek((x), (y), (z))
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#define fdopen(x, y) _fdopen((x), (y))
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#define write(x, y, z) _write((x), (y), (unsigned) z)
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#define read(x, y, z) _read((x), (y), (unsigned) z)
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#define flockfile(x) EnterCriticalSection(&global_log_file_lock)
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#define funlockfile(x) LeaveCriticalSection(&global_log_file_lock)
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#define fileno(x) _fileno(x)
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#endif // !fileno MINGW #defines fileno
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typedef HANDLE pthread_mutex_t;
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typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
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typedef DWORD pthread_t;
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#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
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static int pthread_mutex_lock(pthread_mutex_t *);
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static int pthread_mutex_unlock(pthread_mutex_t *);
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static FILE *mg_fopen(const char *path, const char *mode);
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#if defined(HAVE_STDINT)
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typedef unsigned int uint32_t;
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typedef unsigned short uint16_t;
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typedef unsigned __int64 uint64_t;
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typedef __int64 int64_t;
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#define INT64_MAX 9223372036854775807
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#endif // HAVE_STDINT
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// POSIX dirent interface
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char d_name[PATH_MAX];
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WIN32_FIND_DATAW info;
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struct dirent result;
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#else // UNIX specific
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <sys/select.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/time.h>
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#include <inttypes.h>
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#if !defined(NO_SSL_DL) && !defined(NO_SSL)
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#if defined(__MACH__)
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#define SSL_LIB "libssl.dylib"
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#define CRYPTO_LIB "libcrypto.dylib"
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#if !defined(SSL_LIB)
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#define SSL_LIB "libssl.so"
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#if !defined(CRYPTO_LIB)
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#define CRYPTO_LIB "libcrypto.so"
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#define IS_DIRSEP_CHAR(c) ((c) == '/')
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#define closesocket(a) close(a)
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#define mg_fopen(x, y) fopen(x, y)
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#define mg_mkdir(x, y) mkdir(x, y)
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#define mg_remove(x) remove(x)
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#define mg_rename(x, y) rename(x, y)
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#define INVALID_SOCKET (-1)
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#define INT64_FMT PRId64
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#endif // End of Windows and UNIX specific includes
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#include "mongoose.h"
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#define MONGOOSE_VERSION "3.1"
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#define PASSWORDS_FILE_NAME ".htpasswd"
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#define CGI_ENVIRONMENT_SIZE 4096
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#define MAX_CGI_ENVIR_VARS 64
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#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
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static CRITICAL_SECTION global_log_file_lock;
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static pthread_t pthread_self(void) {
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return GetCurrentThreadId();
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#define DEBUG_TRACE(x) do { \
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printf("*** %lu.%p.%s.%d: ", \
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(unsigned long) time(NULL), (void *) pthread_self(), \
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__func__, __LINE__); \
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funlockfile(stdout); \
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#define DEBUG_TRACE(x)
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// Darwin prior to 7.0 and Win32 do not have socklen_t
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typedef int socklen_t;
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#endif // NO_SOCKLEN_T
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#if !defined(MSG_NOSIGNAL)
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#define MSG_NOSIGNAL 0
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typedef void * (*mg_thread_func_t)(void *);
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static const char *http_500_error = "Internal Server Error";
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// Snatched from OpenSSL includes. I put the prototypes here to be independent
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// from the OpenSSL source installation. Having this, mongoose + SSL can be
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// built on any system with binary SSL libraries installed.
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typedef struct ssl_st SSL;
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typedef struct ssl_method_st SSL_METHOD;
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typedef struct ssl_ctx_st SSL_CTX;
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#define SSL_ERROR_WANT_READ 2
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#define SSL_ERROR_WANT_WRITE 3
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#define SSL_FILETYPE_PEM 1
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#define CRYPTO_LOCK 1
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#if defined(NO_SSL_DL)
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extern void SSL_free(SSL *);
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extern int SSL_accept(SSL *);
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extern int SSL_connect(SSL *);
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extern int SSL_read(SSL *, void *, int);
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extern int SSL_write(SSL *, const void *, int);
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extern int SSL_get_error(const SSL *, int);
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extern int SSL_set_fd(SSL *, int);
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extern SSL *SSL_new(SSL_CTX *);
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extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
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extern SSL_METHOD *SSLv23_server_method(void);
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extern int SSL_library_init(void);
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extern void SSL_load_error_strings(void);
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extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
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extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
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extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
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extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
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extern void SSL_CTX_free(SSL_CTX *);
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extern unsigned long ERR_get_error(void);
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extern char *ERR_error_string(unsigned long, char *);
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extern int CRYPTO_num_locks(void);
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extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
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extern void CRYPTO_set_id_callback(unsigned long (*)(void));
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// Dynamically loaded SSL functionality
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const char *name; // SSL function name
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void (*ptr)(void); // Function pointer
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#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
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#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
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#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
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#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
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#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
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#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
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#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
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#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
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#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
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#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
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#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
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#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
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const char *, int)) ssl_sw[11].ptr)
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#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
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const char *, int)) ssl_sw[12].ptr)
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#define SSL_CTX_set_default_passwd_cb \
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(* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
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#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
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#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
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#define SSL_CTX_use_certificate_chain_file \
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(* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
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#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
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#define CRYPTO_set_locking_callback \
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(* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
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#define CRYPTO_set_id_callback \
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(* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
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#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
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#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
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// set_ssl_option() function updates this array.
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// It loads SSL library dynamically and changes NULLs to the actual addresses
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// of respective functions. The macros above (like SSL_connect()) are really
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// just calling these functions indirectly via the pointer.
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static struct ssl_func ssl_sw[] = {
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{"SSL_accept", NULL},
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{"SSL_connect", NULL},
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{"SSL_get_error", NULL},
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{"SSL_set_fd", NULL},
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{"SSL_CTX_new", NULL},
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{"SSLv23_server_method", NULL},
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{"SSL_library_init", NULL},
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{"SSL_CTX_use_PrivateKey_file", NULL},
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{"SSL_CTX_use_certificate_file",NULL},
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{"SSL_CTX_set_default_passwd_cb",NULL},
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{"SSL_CTX_free", NULL},
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{"SSL_load_error_strings", NULL},
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{"SSL_CTX_use_certificate_chain_file", NULL},
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// Similar array as ssl_sw. These functions could be located in different lib.
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static struct ssl_func crypto_sw[] = {
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{"CRYPTO_num_locks", NULL},
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{"CRYPTO_set_locking_callback", NULL},
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{"CRYPTO_set_id_callback", NULL},
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{"ERR_get_error", NULL},
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{"ERR_error_string", NULL},
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static const char *month_names[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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// Unified socket address. For IPv6 support, add IPv6 address structure
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struct sockaddr_in sin;
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#if defined(USE_IPV6)
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struct sockaddr_in6 sin6;
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// Describes a string (chunk of memory).
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// Structure used by mg_stat() function. Uses 64 bit file length.
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int is_directory; // Directory marker
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int64_t size; // File size
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time_t mtime; // Modification time
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// Describes listening socket, or socket which was accept()-ed by the master
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// thread and queued for future handling by the worker thread.
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struct socket *next; // Linkage
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SOCKET sock; // Listening socket
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union usa lsa; // Local socket address
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union usa rsa; // Remote socket address
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int is_ssl; // Is socket SSL-ed
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CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
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PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE,
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SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
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GLOBAL_PASSWORDS_FILE, INDEX_FILES,
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ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE,
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EXTRA_MIME_TYPES, LISTENING_PORTS,
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DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER, REWRITE,
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static const char *config_options[] = {
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"C", "cgi_pattern", "**.cgi$|**.pl$|**.php$",
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"E", "cgi_environment", NULL,
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"G", "put_delete_passwords_file", NULL,
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"I", "cgi_interpreter", NULL,
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"P", "protect_uri", NULL,
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"R", "authentication_domain", "mydomain.com",
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"S", "ssi_pattern", "**.shtml$|**.shtm$",
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"a", "access_log_file", NULL,
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"c", "ssl_chain_file", NULL,
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"d", "enable_directory_listing", "yes",
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"e", "error_log_file", NULL,
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"g", "global_passwords_file", NULL,
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"i", "index_files", "index.html,index.htm,index.cgi",
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"k", "enable_keep_alive", "no",
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"l", "access_control_list", NULL,
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"M", "max_request_size", "16384",
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"m", "extra_mime_types", NULL,
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"p", "listening_ports", "8080",
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"r", "document_root", ".",
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"s", "ssl_certificate", NULL,
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"t", "num_threads", "10",
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"u", "run_as_user", NULL,
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"w", "url_rewrite_patterns", NULL,
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#define ENTRIES_PER_CONFIG_OPTION 3
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volatile int stop_flag; // Should we stop event loop
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SSL_CTX *ssl_ctx; // SSL context
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char *config[NUM_OPTIONS]; // Mongoose configuration parameters
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mg_callback_t user_callback; // User-defined callback function
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void *user_data; // User-defined data
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struct socket *listening_sockets;
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volatile int num_threads; // Number of threads
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pthread_mutex_t mutex; // Protects (max|num)_threads
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pthread_cond_t cond; // Condvar for tracking workers terminations
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struct socket queue[20]; // Accepted sockets
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volatile int sq_head; // Head of the socket queue
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volatile int sq_tail; // Tail of the socket queue
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pthread_cond_t sq_full; // Singaled when socket is produced
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pthread_cond_t sq_empty; // Signaled when socket is consumed
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struct mg_connection {
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struct mg_request_info request_info;
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struct mg_context *ctx;
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SSL *ssl; // SSL descriptor
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struct socket client; // Connected client
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time_t birth_time; // Time connection was accepted
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int64_t num_bytes_sent; // Total bytes sent to client
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int64_t content_len; // Content-Length header value
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int64_t consumed_content; // How many bytes of content is already read
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char *buf; // Buffer for received data
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char *path_info; // PATH_INFO part of the URL
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int must_close; // 1 if connection must be closed
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int buf_size; // Buffer size
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int request_len; // Size of the request + headers in a buffer
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int data_len; // Total size of data in a buffer
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const char **mg_get_valid_option_names(void) {
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return config_options;
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static void *call_user(struct mg_connection *conn, enum mg_event event) {
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conn->request_info.user_data = conn->ctx->user_data;
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return conn->ctx->user_callback == NULL ? NULL :
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conn->ctx->user_callback(event, conn, &conn->request_info);
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static int get_option_index(const char *name) {
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for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
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if (strcmp(config_options[i], name) == 0 ||
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strcmp(config_options[i + 1], name) == 0) {
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return i / ENTRIES_PER_CONFIG_OPTION;
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const char *mg_get_option(const struct mg_context *ctx, const char *name) {
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if ((i = get_option_index(name)) == -1) {
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} else if (ctx->config[i] == NULL) {
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return ctx->config[i];
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static void sockaddr_to_string(char *buf, size_t len,
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const union usa *usa) {
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#if defined(USE_IPV6)
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inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
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(void *) &usa->sin.sin_addr :
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(void *) &usa->sin6.sin6_addr, buf, len);
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#elif defined(_WIN32)
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// Only Windoze Vista (and newer) have inet_ntop()
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strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
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inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
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// Print error message to the opened error log stream.
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static void cry(struct mg_connection *conn, const char *fmt, ...) {
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char buf[BUFSIZ], src_addr[20];
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(void) vsnprintf(buf, sizeof(buf), fmt, ap);
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// Do not lock when getting the callback value, here and below.
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// I suppose this is fine, since function cannot disappear in the
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// same way string option can.
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conn->request_info.log_message = buf;
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if (call_user(conn, MG_EVENT_LOG) == NULL) {
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fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
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mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
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timestamp = time(NULL);
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sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
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fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp,
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if (conn->request_info.request_method != NULL) {
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fprintf(fp, "%s %s: ", conn->request_info.request_method,
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conn->request_info.uri);
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(void) fprintf(fp, "%s", buf);
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conn->request_info.log_message = NULL;
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// Return OpenSSL error message
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static const char *ssl_error(void) {
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err = ERR_get_error();
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return err == 0 ? "" : ERR_error_string(err, NULL);
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// Return fake connection structure. Used for logging, if connection
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// is not applicable at the moment of logging.
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static struct mg_connection *fc(struct mg_context *ctx) {
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static struct mg_connection fake_connection;
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fake_connection.ctx = ctx;
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return &fake_connection;
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const char *mg_version(void) {
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return MONGOOSE_VERSION;
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static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
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for (; *src != '\0' && n > 1; n--) {
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static int lowercase(const char *s) {
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return tolower(* (const unsigned char *) s);
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static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
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diff = lowercase(s1++) - lowercase(s2++);
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} while (diff == 0 && s1[-1] != '\0' && --len > 0);
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static int mg_strcasecmp(const char *s1, const char *s2) {
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diff = lowercase(s1++) - lowercase(s2++);
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} while (diff == 0 && s1[-1] != '\0');
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static char * mg_strndup(const char *ptr, size_t len) {
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if ((p = (char *) malloc(len + 1)) != NULL) {
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mg_strlcpy(p, ptr, len + 1);
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static char * mg_strdup(const char *str) {
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return mg_strndup(str, strlen(str));
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// Like snprintf(), but never returns negative value, or the value
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// that is larger than a supplied buffer.
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// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
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// in his audit report.
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static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
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const char *fmt, va_list ap) {
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n = vsnprintf(buf, buflen, fmt, ap);
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cry(conn, "vsnprintf error");
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} else if (n >= (int) buflen) {
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cry(conn, "truncating vsnprintf buffer: [%.*s]",
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n > 200 ? 200 : n, buf);
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n = (int) buflen - 1;
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static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
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const char *fmt, ...) {
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n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
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// Skip the characters until one of the delimiters characters found.
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// 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
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// Advance pointer to buffer to the next word. Return found 0-terminated word.
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// Delimiters can be quoted with quotechar.
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static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) {
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char *p, *begin_word, *end_word, *end_whitespace;
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end_word = begin_word + strcspn(begin_word, delimiters);
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// Check for quotechar
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if (end_word > begin_word) {
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while (*p == quotechar) {
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// If there is anything beyond end_word, copy it
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if (*end_word == '\0') {
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size_t end_off = strcspn(end_word + 1, delimiters);
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memmove (p, end_word, end_off + 1);
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p += end_off; // p must correspond to end_word - 1
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end_word += end_off + 1;
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for (p++; p < end_word; p++) {
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if (*end_word == '\0') {
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end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
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for (p = end_word; p < end_whitespace; p++) {
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*buf = end_whitespace;
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// Simplified version of skip_quoted without quote char
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// and whitespace == delimiters
723
static char *skip(char **buf, const char *delimiters) {
724
return skip_quoted(buf, delimiters, delimiters, 0);
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// Return HTTP header value, or NULL if not found.
729
static const char *get_header(const struct mg_request_info *ri,
733
for (i = 0; i < ri->num_headers; i++)
734
if (!mg_strcasecmp(name, ri->http_headers[i].name))
735
return ri->http_headers[i].value;
740
const char *mg_get_header(const struct mg_connection *conn, const char *name) {
741
return get_header(&conn->request_info, name);
744
// A helper function for traversing comma separated list of values.
745
// It returns a list pointer shifted to the next value, of NULL if the end
746
// of the list found.
747
// Value is stored in val vector. If value has form "x=y", then eq_val
748
// vector is initialized to point to the "y" part, and val vector length
749
// is adjusted to point only to "x".
750
static const char *next_option(const char *list, struct vec *val,
751
struct vec *eq_val) {
752
if (list == NULL || *list == '\0') {
757
if ((list = strchr(val->ptr, ',')) != NULL) {
758
// Comma found. Store length and shift the list ptr
759
val->len = list - val->ptr;
762
// This value is the last one
763
list = val->ptr + strlen(val->ptr);
764
val->len = list - val->ptr;
767
if (eq_val != NULL) {
768
// Value has form "x=y", adjust pointers and lengths
769
// so that val points to "x", and eq_val points to "y".
771
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
772
if (eq_val->ptr != NULL) {
773
eq_val->ptr++; // Skip over '=' character
774
eq_val->len = val->ptr + val->len - eq_val->ptr;
775
val->len = (eq_val->ptr - val->ptr) - 1;
783
static int match_prefix(const char *pattern, int pattern_len, const char *str) {
787
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
788
res = match_prefix(pattern, or_str - pattern, str);
789
return res > 0 ? res :
790
match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
795
for (; i < pattern_len; i++, j++) {
796
if (pattern[i] == '?' && str[j] != '\0') {
798
} else if (pattern[i] == '$') {
799
return str[j] == '\0' ? j : -1;
800
} else if (pattern[i] == '*') {
802
if (pattern[i] == '*') {
804
len = strlen(str + j);
806
len = strcspn(str + j, "/");
808
if (i == pattern_len) {
812
res = match_prefix(pattern + i, pattern_len - i, str + j + len);
813
} while (res == -1 && len-- > 0);
814
return res == -1 ? -1 : j + res + len;
815
} else if (pattern[i] != str[j]) {
822
// HTTP 1.1 assumes keep alive if "Connection:" header is not set
823
// This function must tolerate situations when connection info is not
824
// set up, for example if request parsing failed.
825
static int should_keep_alive(const struct mg_connection *conn) {
826
const char *http_version = conn->request_info.http_version;
827
const char *header = mg_get_header(conn, "Connection");
828
return (!conn->must_close &&
829
!conn->request_info.status_code != 401 &&
830
!mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") &&
831
(header == NULL && http_version && !strcmp(http_version, "1.1"))) ||
832
(header != NULL && !mg_strcasecmp(header, "keep-alive"));
835
static const char *suggest_connection_header(const struct mg_connection *conn) {
836
return should_keep_alive(conn) ? "keep-alive" : "close";
839
static void send_http_error(struct mg_connection *conn, int status,
840
const char *reason, const char *fmt, ...) {
845
conn->request_info.status_code = status;
847
if (call_user(conn, MG_HTTP_ERROR) == NULL) {
851
// Errors 1xx, 204 and 304 MUST NOT send a body
852
if (status > 199 && status != 204 && status != 304) {
853
len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
854
cry(conn, "%s", buf);
858
len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
861
DEBUG_TRACE(("[%s]", buf));
863
mg_printf(conn, "HTTP/1.1 %d %s\r\n"
864
"Content-Type: text/plain\r\n"
865
"Content-Length: %d\r\n"
866
"Connection: %s\r\n\r\n", status, reason, len,
867
suggest_connection_header(conn));
868
conn->num_bytes_sent += mg_printf(conn, "%s", buf);
872
#if defined(_WIN32) && !defined(__SYMBIAN32__)
873
static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
875
*mutex = CreateMutex(NULL, FALSE, NULL);
876
return *mutex == NULL ? -1 : 0;
879
static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
880
return CloseHandle(*mutex) == 0 ? -1 : 0;
883
static int pthread_mutex_lock(pthread_mutex_t *mutex) {
884
return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
887
static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
888
return ReleaseMutex(*mutex) == 0 ? -1 : 0;
891
static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
893
cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
894
cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
895
return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
898
static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
899
HANDLE handles[] = {cv->signal, cv->broadcast};
900
ReleaseMutex(*mutex);
901
WaitForMultipleObjects(2, handles, FALSE, INFINITE);
902
return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
905
static int pthread_cond_signal(pthread_cond_t *cv) {
906
return SetEvent(cv->signal) == 0 ? -1 : 0;
909
static int pthread_cond_broadcast(pthread_cond_t *cv) {
910
// Implementation with PulseEvent() has race condition, see
911
// http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
912
return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
915
static int pthread_cond_destroy(pthread_cond_t *cv) {
916
return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
919
// For Windows, change all slashes to backslashes in path names.
920
static void change_slashes_to_backslashes(char *path) {
923
for (i = 0; path[i] != '\0'; i++) {
926
// i > 0 check is to preserve UNC paths, like \\server\file.txt
927
if (path[i] == '\\' && i > 0)
928
while (path[i + 1] == '\\' || path[i + 1] == '/')
929
(void) memmove(path + i + 1,
930
path + i + 2, strlen(path + i + 1));
934
// Encode 'path' which is assumed UTF-8 string, into UNICODE string.
935
// wbuf and wbuf_len is a target buffer and its length.
936
static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
937
char buf[PATH_MAX], buf2[PATH_MAX], *p;
939
mg_strlcpy(buf, path, sizeof(buf));
940
change_slashes_to_backslashes(buf);
942
// Point p to the end of the file name
943
p = buf + strlen(buf) - 1;
945
// Trim trailing backslash character
946
while (p > buf && *p == '\\' && p[-1] != ':') {
950
// Protect from CGI code disclosure.
951
// This is very nasty hole. Windows happily opens files with
952
// some garbage in the end of file name. So fopen("a.cgi ", "r")
953
// actually opens "a.cgi", and does not return an error!
954
if (*p == 0x20 || // No space at the end
955
(*p == 0x2e && p > buf) || // No '.' but allow '.' as full path
956
*p == 0x2b || // No '+'
957
(*p & ~0x7f)) { // And generally no non-ascii chars
958
(void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
961
// Convert to Unicode and back. If doubly-converted string does not
962
// match the original, something is fishy, reject.
963
memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
964
MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
965
WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
967
if (strcmp(buf, buf2) != 0) {
973
#if defined(_WIN32_WCE)
974
static time_t time(time_t *ptime) {
980
SystemTimeToFileTime(&st, &ft);
981
t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
990
static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
991
int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
994
TIME_ZONE_INFORMATION tzinfo;
1000
* (int64_t *) &ft = t;
1001
FileTimeToLocalFileTime(&ft, &lft);
1002
FileTimeToSystemTime(&lft, &st);
1003
ptm->tm_year = st.wYear - 1900;
1004
ptm->tm_mon = st.wMonth - 1;
1005
ptm->tm_wday = st.wDayOfWeek;
1006
ptm->tm_mday = st.wDay;
1007
ptm->tm_hour = st.wHour;
1008
ptm->tm_min = st.wMinute;
1009
ptm->tm_sec = st.wSecond;
1010
ptm->tm_yday = 0; // hope nobody uses this
1012
GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
1017
static struct tm *gmtime(const time_t *ptime, struct tm *ptm) {
1018
// FIXME(lsm): fix this.
1019
return localtime(ptime, ptm);
1022
static size_t strftime(char *dst, size_t dst_size, const char *fmt,
1023
const struct tm *tm) {
1024
(void) snprintf(dst, dst_size, "implement strftime() for WinCE");
1029
static int mg_rename(const char* oldname, const char* newname) {
1030
wchar_t woldbuf[PATH_MAX];
1031
wchar_t wnewbuf[PATH_MAX];
1033
to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
1034
to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
1036
return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
1040
static FILE *mg_fopen(const char *path, const char *mode) {
1041
wchar_t wbuf[PATH_MAX], wmode[20];
1043
to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
1044
MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
1046
return _wfopen(wbuf, wmode);
1049
static int mg_stat(const char *path, struct mgstat *stp) {
1050
int ok = -1; // Error
1051
wchar_t wbuf[PATH_MAX];
1052
WIN32_FILE_ATTRIBUTE_DATA info;
1054
to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
1056
if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
1057
stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
1058
stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
1059
info.ftLastWriteTime.dwHighDateTime);
1061
info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
1068
static int mg_remove(const char *path) {
1069
wchar_t wbuf[PATH_MAX];
1070
to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
1071
return DeleteFileW(wbuf) ? 0 : -1;
1074
static int mg_mkdir(const char *path, int mode) {
1076
wchar_t wbuf[PATH_MAX];
1079
mg_strlcpy(buf, path, sizeof(buf));
1080
change_slashes_to_backslashes(buf);
1082
(void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
1084
return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
1087
// Implementation of POSIX opendir/closedir/readdir for Windows.
1088
static DIR * opendir(const char *name) {
1090
wchar_t wpath[PATH_MAX];
1094
SetLastError(ERROR_BAD_ARGUMENTS);
1095
} else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
1096
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
1098
to_unicode(name, wpath, ARRAY_SIZE(wpath));
1099
attrs = GetFileAttributesW(wpath);
1100
if (attrs != 0xFFFFFFFF &&
1101
((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
1102
(void) wcscat(wpath, L"\\*");
1103
dir->handle = FindFirstFileW(wpath, &dir->info);
1104
dir->result.d_name[0] = '\0';
1114
static int closedir(DIR *dir) {
1118
if (dir->handle != INVALID_HANDLE_VALUE)
1119
result = FindClose(dir->handle) ? 0 : -1;
1124
SetLastError(ERROR_BAD_ARGUMENTS);
1130
struct dirent * readdir(DIR *dir) {
1131
struct dirent *result = 0;
1134
if (dir->handle != INVALID_HANDLE_VALUE) {
1135
result = &dir->result;
1136
(void) WideCharToMultiByte(CP_UTF8, 0,
1137
dir->info.cFileName, -1, result->d_name,
1138
sizeof(result->d_name), NULL, NULL);
1140
if (!FindNextFileW(dir->handle, &dir->info)) {
1141
(void) FindClose(dir->handle);
1142
dir->handle = INVALID_HANDLE_VALUE;
1146
SetLastError(ERROR_FILE_NOT_FOUND);
1149
SetLastError(ERROR_BAD_ARGUMENTS);
1155
#define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
1157
static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) {
1158
return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0;
1161
static HANDLE dlopen(const char *dll_name, int flags) {
1162
wchar_t wbuf[PATH_MAX];
1163
flags = 0; // Unused
1164
to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
1165
return LoadLibraryW(wbuf);
1168
#if !defined(NO_CGI)
1170
static int kill(pid_t pid, int sig_num) {
1171
(void) TerminateProcess(pid, sig_num);
1172
(void) CloseHandle(pid);
1176
static pid_t spawn_process(struct mg_connection *conn, const char *prog,
1177
char *envblk, char *envp[], int fd_stdin,
1178
int fd_stdout, const char *dir) {
1180
char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
1182
STARTUPINFOA si = { sizeof(si) };
1183
PROCESS_INFORMATION pi = { 0 };
1185
envp = NULL; // Unused
1187
// TODO(lsm): redirect CGI errors to the error log file
1188
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
1189
si.wShowWindow = SW_HIDE;
1191
me = GetCurrentProcess();
1192
(void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
1193
&si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
1194
(void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
1195
&si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
1197
// If CGI file is a script, try to read the interpreter line
1198
interp = conn->ctx->config[CGI_INTERPRETER];
1199
if (interp == NULL) {
1201
mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog);
1202
if ((fp = fopen(cmdline, "r")) != NULL) {
1203
(void) fgets(buf, sizeof(buf), fp);
1204
if (buf[0] != '#' || buf[1] != '!') {
1205
// First line does not start with "#!". Do not set interpreter.
1208
// Trim whitespaces in interpreter name
1209
for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
1218
(void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
1219
interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
1221
DEBUG_TRACE(("Running [%s]", cmdline));
1222
if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
1223
CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
1224
cry(conn, "%s: CreateProcess(%s): %d",
1225
__func__, cmdline, ERRNO);
1226
pi.hProcess = (pid_t) -1;
1228
(void) close(fd_stdin);
1229
(void) close(fd_stdout);
1232
(void) CloseHandle(si.hStdOutput);
1233
(void) CloseHandle(si.hStdInput);
1234
(void) CloseHandle(pi.hThread);
1236
return (pid_t) pi.hProcess;
1240
static int set_non_blocking_mode(SOCKET sock) {
1241
unsigned long on = 1;
1242
return ioctlsocket(sock, FIONBIO, &on);
1246
static int mg_stat(const char *path, struct mgstat *stp) {
1250
if (stat(path, &st) == 0) {
1252
stp->size = st.st_size;
1253
stp->mtime = st.st_mtime;
1254
stp->is_directory = S_ISDIR(st.st_mode);
1262
static void set_close_on_exec(int fd) {
1263
(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
1266
static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
1268
pthread_t thread_id;
1269
pthread_attr_t attr;
1272
(void) pthread_attr_init(&attr);
1273
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
1274
// TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
1275
// (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
1277
if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) {
1278
cry(fc(ctx), "%s: %s", __func__, strerror(retval));
1285
static pid_t spawn_process(struct mg_connection *conn, const char *prog,
1286
char *envblk, char *envp[], int fd_stdin,
1287
int fd_stdout, const char *dir) {
1291
envblk = NULL; // Unused
1293
if ((pid = fork()) == -1) {
1295
send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
1296
} else if (pid == 0) {
1298
if (chdir(dir) != 0) {
1299
cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
1300
} else if (dup2(fd_stdin, 0) == -1) {
1301
cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
1302
} else if (dup2(fd_stdout, 1) == -1) {
1303
cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
1305
(void) dup2(fd_stdout, 2);
1306
(void) close(fd_stdin);
1307
(void) close(fd_stdout);
1309
// Execute CGI program. No need to lock: new process
1310
interp = conn->ctx->config[CGI_INTERPRETER];
1311
if (interp == NULL) {
1312
(void) execle(prog, prog, NULL, envp);
1313
cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
1315
(void) execle(interp, interp, prog, NULL, envp);
1316
cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
1322
// Parent. Close stdio descriptors
1323
(void) close(fd_stdin);
1324
(void) close(fd_stdout);
1331
static int set_non_blocking_mode(SOCKET sock) {
1334
flags = fcntl(sock, F_GETFL, 0);
1335
(void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
1341
// Write data to the IO channel - opened file descriptor, socket or SSL
1342
// descriptor. Return number of bytes written.
1343
static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
1349
while (sent < len) {
1351
// How many bytes we send in this iteration
1352
k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
1355
n = SSL_write(ssl, buf + sent, k);
1356
} else if (fp != NULL) {
1357
n = fwrite(buf + sent, 1, (size_t) k, fp);
1361
n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL);
1373
// Read from IO channel - opened file descriptor, socket, or SSL descriptor.
1374
// Return number of bytes read.
1375
static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) {
1379
nread = SSL_read(ssl, buf, len);
1380
} else if (fp != NULL) {
1381
// Use read() instead of fread(), because if we're reading from the CGI
1382
// pipe, fread() may block until IO buffer is filled up. We cannot afford
1383
// to block and must pass all read bytes immediately to the client.
1384
nread = read(fileno(fp), buf, (size_t) len);
1388
nread = recv(sock, buf, (size_t) len, 0);
1394
int mg_read(struct mg_connection *conn, void *buf, size_t len) {
1395
int n, buffered_len, nread;
1396
const char *buffered;
1398
assert((conn->content_len == -1 && conn->consumed_content == 0) ||
1399
conn->consumed_content <= conn->content_len);
1400
DEBUG_TRACE(("%p %zu %lld %lld", buf, len,
1401
conn->content_len, conn->consumed_content));
1403
if (conn->consumed_content < conn->content_len) {
1405
// Adjust number of bytes to read.
1406
int64_t to_read = conn->content_len - conn->consumed_content;
1407
if (to_read < (int64_t) len) {
1408
len = (int) to_read;
1411
// How many bytes of data we have buffered in the request buffer?
1412
buffered = conn->buf + conn->request_len + conn->consumed_content;
1413
buffered_len = conn->data_len - conn->request_len;
1414
assert(buffered_len >= 0);
1416
// Return buffered data back if we haven't done that yet.
1417
if (conn->consumed_content < (int64_t) buffered_len) {
1418
buffered_len -= (int) conn->consumed_content;
1419
if (len < (size_t) buffered_len) {
1422
memcpy(buf, buffered, (size_t)buffered_len);
1423
len -= buffered_len;
1424
buf = (char *) buf + buffered_len;
1425
conn->consumed_content += buffered_len;
1426
nread = buffered_len;
1429
// We have returned all buffered data. Read new data from the remote socket.
1431
n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len);
1435
buf = (char *) buf + n;
1436
conn->consumed_content += n;
1444
int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
1445
return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
1449
int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
1455
len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap);
1458
return mg_write(conn, buf, (size_t)len);
1461
// URL-decode input buffer into destination buffer.
1462
// 0-terminate the destination buffer. Return the length of decoded data.
1463
// form-url-encoded data differs from URI encoding in a way that it
1464
// uses '+' as character for space, see RFC 1866 section 8.2.1
1465
// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
1466
static size_t url_decode(const char *src, size_t src_len, char *dst,
1467
size_t dst_len, int is_form_url_encoded) {
1470
#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
1472
for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
1473
if (src[i] == '%' &&
1474
isxdigit(* (const unsigned char *) (src + i + 1)) &&
1475
isxdigit(* (const unsigned char *) (src + i + 2))) {
1476
a = tolower(* (const unsigned char *) (src + i + 1));
1477
b = tolower(* (const unsigned char *) (src + i + 2));
1478
dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
1480
} else if (is_form_url_encoded && src[i] == '+') {
1487
dst[j] = '\0'; // Null-terminate the destination
1492
// Scan given buffer and fetch the value of the given variable.
1493
// It can be specified in query string, or in the POST data.
1494
// Return NULL if the variable not found, or allocated 0-terminated value.
1495
// It is caller's responsibility to free the returned value.
1496
int mg_get_var(const char *buf, size_t buf_len, const char *name,
1497
char *dst, size_t dst_len) {
1498
const char *p, *e, *s;
1499
size_t name_len, len;
1501
name_len = strlen(name);
1506
// buf is "var1=val1&var2=val2...". Find variable first
1507
for (p = buf; p != NULL && p + name_len < e; p++) {
1508
if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
1509
!mg_strncasecmp(name, p, name_len)) {
1511
// Point p to variable value
1514
// Point s to the end of the value
1515
s = (const char *) memchr(p, '&', (size_t)(e - p));
1521
// Decode variable into destination buffer
1522
if ((size_t) (s - p) < dst_len) {
1523
len = url_decode(p, (size_t)(s - p), dst, dst_len, 1);
1532
int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
1533
char *dst, size_t dst_size) {
1534
const char *s, *p, *end;
1535
int name_len, len = -1;
1538
if ((s = mg_get_header(conn, "Cookie")) == NULL) {
1542
name_len = strlen(cookie_name);
1543
end = s + strlen(s);
1545
for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
1546
if (s[name_len] == '=') {
1548
if ((p = strchr(s, ' ')) == NULL)
1552
if (*s == '"' && p[-1] == '"' && p > s + 1) {
1556
if ((size_t) (p - s) < dst_size) {
1558
mg_strlcpy(dst, s, (size_t)len);
1566
static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
1567
size_t buf_len, struct mgstat *st) {
1569
const char *rewrite, *uri = conn->request_info.uri;
1571
int match_len, stat_result;
1573
buf_len--; // This is because memmove() for PATH_INFO may shift part
1574
// of the path one byte on the right.
1575
mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT],
1578
rewrite = conn->ctx->config[REWRITE];
1579
while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
1580
if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
1581
mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len);
1586
#if defined(_WIN32) && !defined(__SYMBIAN32__)
1587
//change_slashes_to_backslashes(buf);
1590
if ((stat_result = mg_stat(buf, st)) != 0) {
1591
// Support PATH_INFO for CGI scripts.
1592
for (p = buf + strlen(buf); p > buf + 1; p--) {
1595
if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
1596
strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 &&
1597
(stat_result = mg_stat(buf, st)) == 0) {
1598
conn->path_info = p + 1;
1599
memmove(p + 2, p + 1, strlen(p + 1));
1613
static int sslize(struct mg_connection *conn, int (*func)(SSL *)) {
1614
return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL &&
1615
SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
1616
func(conn->ssl) == 1;
1619
// Check whether full request is buffered. Return:
1620
// -1 if request is malformed
1621
// 0 if request is not yet fully buffered
1622
// >0 actual request length, including last \r\n\r\n
1623
static int get_request_len(const char *buf, int buflen) {
1627
DEBUG_TRACE(("buf: %p, len: %d", buf, buflen));
1628
for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
1629
// Control characters are not allowed but >=128 is.
1630
if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
1631
*s != '\n' && * (const unsigned char *) s < 128) {
1633
} else if (s[0] == '\n' && s[1] == '\n') {
1634
len = (int) (s - buf) + 2;
1635
} else if (s[0] == '\n' && &s[1] < e &&
1636
s[1] == '\r' && s[2] == '\n') {
1637
len = (int) (s - buf) + 3;
1643
// Convert month to the month number. Return -1 on error, or month number
1644
static int get_month_index(const char *s) {
1647
for (i = 0; i < ARRAY_SIZE(month_names); i++)
1648
if (!strcmp(s, month_names[i]))
1654
// Parse UTC date-time string, and return the corresponding time_t value.
1655
static time_t parse_date_string(const char *datetime) {
1656
static const unsigned short days_before_month[] = {
1657
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
1660
int second, minute, hour, day, month, year, leap_days, days;
1661
time_t result = (time_t) 0;
1663
if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
1664
&day, month_str, &year, &hour, &minute, &second) == 6) ||
1665
(sscanf(datetime, "%d %3s %d %d:%d:%d",
1666
&day, month_str, &year, &hour, &minute, &second) == 6) ||
1667
(sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
1668
&day, month_str, &year, &hour, &minute, &second) == 6) ||
1669
(sscanf(datetime, "%d-%3s-%d %d:%d:%d",
1670
&day, month_str, &year, &hour, &minute, &second) == 6)) &&
1672
(month = get_month_index(month_str)) != -1) {
1674
leap_days = year / 4 - year / 100 + year / 400;
1675
days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
1676
result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
1682
// Protect against directory disclosure attack by removing '..',
1683
// excessive '/' and '\' characters
1684
static void remove_double_dots_and_double_slashes(char *s) {
1687
while (*s != '\0') {
1689
if (IS_DIRSEP_CHAR(s[-1])) {
1690
// Skip all following slashes and backslashes
1691
while (IS_DIRSEP_CHAR(s[0])) {
1695
// Skip all double-dots
1696
while (*s == '.' && s[1] == '.') {
1704
static const struct {
1705
const char *extension;
1707
const char *mime_type;
1708
size_t mime_type_len;
1709
} builtin_mime_types[] = {
1710
{".html", 5, "text/html", 9},
1711
{".htm", 4, "text/html", 9},
1712
{".shtm", 5, "text/html", 9},
1713
{".shtml", 6, "text/html", 9},
1714
{".css", 4, "text/css", 8},
1715
{".js", 3, "application/x-javascript", 24},
1716
{".ico", 4, "image/x-icon", 12},
1717
{".gif", 4, "image/gif", 9},
1718
{".jpg", 4, "image/jpeg", 10},
1719
{".jpeg", 5, "image/jpeg", 10},
1720
{".png", 4, "image/png", 9},
1721
{".svg", 4, "image/svg+xml", 13},
1722
{".torrent", 8, "application/x-bittorrent", 24},
1723
{".wav", 4, "audio/x-wav", 11},
1724
{".mp3", 4, "audio/x-mp3", 11},
1725
{".mid", 4, "audio/mid", 9},
1726
{".m3u", 4, "audio/x-mpegurl", 15},
1727
{".ram", 4, "audio/x-pn-realaudio", 20},
1728
{".xml", 4, "text/xml", 8},
1729
{".xslt", 5, "application/xml", 15},
1730
{".ra", 3, "audio/x-pn-realaudio", 20},
1731
{".doc", 4, "application/msword", 19},
1732
{".exe", 4, "application/octet-stream", 24},
1733
{".zip", 4, "application/x-zip-compressed", 28},
1734
{".xls", 4, "application/excel", 17},
1735
{".tgz", 4, "application/x-tar-gz", 20},
1736
{".tar", 4, "application/x-tar", 17},
1737
{".gz", 3, "application/x-gunzip", 20},
1738
{".arj", 4, "application/x-arj-compressed", 28},
1739
{".rar", 4, "application/x-arj-compressed", 28},
1740
{".rtf", 4, "application/rtf", 15},
1741
{".pdf", 4, "application/pdf", 15},
1742
{".swf", 4, "application/x-shockwave-flash",29},
1743
{".mpg", 4, "video/mpeg", 10},
1744
{".mpeg", 5, "video/mpeg", 10},
1745
{".mp4", 4, "video/mp4", 9},
1746
{".m4v", 4, "video/x-m4v", 11},
1747
{".asf", 4, "video/x-ms-asf", 14},
1748
{".avi", 4, "video/x-msvideo", 15},
1749
{".bmp", 4, "image/bmp", 9},
1753
// Look at the "path" extension and figure what mime type it has.
1754
// Store mime type in the vector.
1755
static void get_mime_type(struct mg_context *ctx, const char *path,
1757
struct vec ext_vec, mime_vec;
1758
const char *list, *ext;
1761
path_len = strlen(path);
1763
// Scan user-defined mime types first, in case user wants to
1764
// override default mime types.
1765
list = ctx->config[EXTRA_MIME_TYPES];
1766
while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
1767
// ext now points to the path suffix
1768
ext = path + path_len - ext_vec.len;
1769
if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
1775
// Now scan built-in mime types
1776
for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
1777
ext = path + (path_len - builtin_mime_types[i].ext_len);
1778
if (path_len > builtin_mime_types[i].ext_len &&
1779
mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
1780
vec->ptr = builtin_mime_types[i].mime_type;
1781
vec->len = builtin_mime_types[i].mime_type_len;
1786
// Nothing found. Fall back to "text/plain"
1787
vec->ptr = "text/plain";
1792
typedef struct MD5Context {
1795
unsigned char in[64];
1798
#if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
1799
#define byteReverse(buf, len) // Do nothing
1801
static void byteReverse(unsigned char *buf, unsigned longs) {
1804
t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
1805
((unsigned) buf[1] << 8 | buf[0]);
1806
*(uint32_t *) buf = t;
1812
#define F1(x, y, z) (z ^ (x & (y ^ z)))
1813
#define F2(x, y, z) F1(z, x, y)
1814
#define F3(x, y, z) (x ^ y ^ z)
1815
#define F4(x, y, z) (y ^ (x | ~z))
1817
#define MD5STEP(f, w, x, y, z, data, s) \
1818
( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
1820
// Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
1821
// initialization constants.
1822
static void MD5Init(MD5_CTX *ctx) {
1823
ctx->buf[0] = 0x67452301;
1824
ctx->buf[1] = 0xefcdab89;
1825
ctx->buf[2] = 0x98badcfe;
1826
ctx->buf[3] = 0x10325476;
1832
static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
1833
register uint32_t a, b, c, d;
1840
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
1841
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
1842
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
1843
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
1844
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
1845
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
1846
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
1847
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
1848
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
1849
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
1850
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
1851
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
1852
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
1853
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
1854
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
1855
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
1857
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
1858
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
1859
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
1860
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
1861
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
1862
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
1863
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
1864
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
1865
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
1866
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
1867
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
1868
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
1869
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
1870
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
1871
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
1872
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
1874
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
1875
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
1876
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
1877
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
1878
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
1879
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
1880
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
1881
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
1882
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
1883
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
1884
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
1885
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
1886
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
1887
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
1888
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
1889
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
1891
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
1892
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
1893
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
1894
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
1895
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
1896
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
1897
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
1898
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
1899
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
1900
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
1901
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
1902
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
1903
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
1904
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
1905
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
1906
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
1914
static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
1918
if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
1920
ctx->bits[1] += len >> 29;
1922
t = (t >> 3) & 0x3f;
1925
unsigned char *p = (unsigned char *) ctx->in + t;
1929
memcpy(p, buf, len);
1933
byteReverse(ctx->in, 16);
1934
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
1940
memcpy(ctx->in, buf, 64);
1941
byteReverse(ctx->in, 16);
1942
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
1947
memcpy(ctx->in, buf, len);
1950
static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
1954
count = (ctx->bits[0] >> 3) & 0x3F;
1956
p = ctx->in + count;
1958
count = 64 - 1 - count;
1960
memset(p, 0, count);
1961
byteReverse(ctx->in, 16);
1962
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
1963
memset(ctx->in, 0, 56);
1965
memset(p, 0, count - 8);
1967
byteReverse(ctx->in, 14);
1969
((uint32_t *) ctx->in)[14] = ctx->bits[0];
1970
((uint32_t *) ctx->in)[15] = ctx->bits[1];
1972
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
1973
byteReverse((unsigned char *) ctx->buf, 4);
1974
memcpy(digest, ctx->buf, 16);
1975
memset((char *) ctx, 0, sizeof(*ctx));
1979
// Stringify binary data. Output buffer must be twice as big as input,
1980
// because each byte takes 2 bytes in string representation
1981
static void bin2str(char *to, const unsigned char *p, size_t len) {
1982
static const char *hex = "0123456789abcdef";
1984
for (; len--; p++) {
1985
*to++ = hex[p[0] >> 4];
1986
*to++ = hex[p[0] & 0x0f];
1991
// Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes.
1992
void mg_md5(char *buf, ...) {
1993
unsigned char hash[16];
2001
while ((p = va_arg(ap, const char *)) != NULL) {
2002
MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
2006
MD5Final(hash, &ctx);
2007
bin2str(buf, hash, sizeof(hash));
2010
// Check the user's password, return 1 if OK
2011
static int check_password(const char *method, const char *ha1, const char *uri,
2012
const char *nonce, const char *nc, const char *cnonce,
2013
const char *qop, const char *response) {
2014
char ha2[32 + 1], expected_response[32 + 1];
2016
// Some of the parameters may be NULL
2017
if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
2018
qop == NULL || response == NULL) {
2022
// NOTE(lsm): due to a bug in MSIE, we do not compare the URI
2023
// TODO(lsm): check for authentication timeout
2024
if (// strcmp(dig->uri, c->ouri) != 0 ||
2025
strlen(response) != 32
2026
// || now - strtoul(dig->nonce, NULL, 10) > 3600
2031
mg_md5(ha2, method, ":", uri, NULL);
2032
mg_md5(expected_response, ha1, ":", nonce, ":", nc,
2033
":", cnonce, ":", qop, ":", ha2, NULL);
2035
return mg_strcasecmp(response, expected_response) == 0;
2038
// Use the global passwords file, if specified by auth_gpass option,
2039
// or search for .htpasswd in the requested directory.
2040
static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
2041
struct mg_context *ctx = conn->ctx;
2042
char name[PATH_MAX];
2047
if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
2048
// Use global passwords file
2049
fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
2051
cry(fc(ctx), "fopen(%s): %s",
2052
ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
2053
} else if (!mg_stat(path, &st) && st.is_directory) {
2054
(void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
2055
path, DIRSEP, PASSWORDS_FILE_NAME);
2056
fp = mg_fopen(name, "r");
2058
// Try to find .htpasswd in requested directory.
2059
for (p = path, e = p + strlen(p) - 1; e > p; e--)
2060
if (IS_DIRSEP_CHAR(*e))
2062
(void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
2063
(int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
2064
fp = mg_fopen(name, "r");
2070
// Parsed Authorization header
2072
char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
2075
static int parse_auth_header(struct mg_connection *conn, char *buf,
2076
size_t buf_size, struct ah *ah) {
2077
char *name, *value, *s;
2078
const char *auth_header;
2080
if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
2081
mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
2085
// Make modifiable copy of the auth header
2086
(void) mg_strlcpy(buf, auth_header + 7, buf_size);
2089
(void) memset(ah, 0, sizeof(*ah));
2091
// Parse authorization header
2093
// Gobble initial spaces
2094
while (isspace(* (unsigned char *) s)) {
2097
name = skip_quoted(&s, "=", " ", 0);
2098
// Value is either quote-delimited, or ends at first comma or space.
2101
value = skip_quoted(&s, "\"", " ", '\\');
2106
value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces
2108
if (*name == '\0') {
2112
if (!strcmp(name, "username")) {
2114
} else if (!strcmp(name, "cnonce")) {
2116
} else if (!strcmp(name, "response")) {
2117
ah->response = value;
2118
} else if (!strcmp(name, "uri")) {
2120
} else if (!strcmp(name, "qop")) {
2122
} else if (!strcmp(name, "nc")) {
2124
} else if (!strcmp(name, "nonce")) {
2129
// CGI needs it as REMOTE_USER
2130
if (ah->user != NULL) {
2131
conn->request_info.remote_user = mg_strdup(ah->user);
2139
// Authorize against the opened passwords file. Return 1 if authorized.
2140
static int authorize(struct mg_connection *conn, FILE *fp) {
2142
char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ];
2144
if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
2148
// Loop over passwords file
2149
while (fgets(line, sizeof(line), fp) != NULL) {
2150
if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
2154
if (!strcmp(ah.user, f_user) &&
2155
!strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
2156
return check_password(
2157
conn->request_info.request_method,
2158
ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
2165
// Return 1 if request is authorised, 0 otherwise.
2166
static int check_authorization(struct mg_connection *conn, const char *path) {
2168
char fname[PATH_MAX];
2169
struct vec uri_vec, filename_vec;
2176
list = conn->ctx->config[PROTECT_URI];
2177
while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
2178
if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
2179
(void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
2180
filename_vec.len, filename_vec.ptr);
2181
if ((fp = mg_fopen(fname, "r")) == NULL) {
2182
cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
2189
fp = open_auth_file(conn, path);
2193
authorized = authorize(conn, fp);
2200
static void send_authorization_request(struct mg_connection *conn) {
2201
conn->request_info.status_code = 401;
2202
(void) mg_printf(conn,
2203
"HTTP/1.1 401 Unauthorized\r\n"
2204
"Content-Length: 0\r\n"
2205
"WWW-Authenticate: Digest qop=\"auth\", "
2206
"realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
2207
conn->ctx->config[AUTHENTICATION_DOMAIN],
2208
(unsigned long) time(NULL));
2211
static int is_authorized_for_put(struct mg_connection *conn) {
2215
fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
2216
mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
2219
ret = authorize(conn, fp);
2226
int mg_modify_passwords_file(const char *fname, const char *domain,
2227
const char *user, const char *pass) {
2229
char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
2235
// Regard empty password as no password - remove user record.
2236
if (pass != NULL && pass[0] == '\0') {
2240
(void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
2242
// Create the file if does not exist
2243
if ((fp = mg_fopen(fname, "a+")) != NULL) {
2247
// Open the given file and temporary file
2248
if ((fp = mg_fopen(fname, "r")) == NULL) {
2250
} else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
2255
// Copy the stuff to temporary file
2256
while (fgets(line, sizeof(line), fp) != NULL) {
2257
if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
2261
if (!strcmp(u, user) && !strcmp(d, domain)) {
2264
mg_md5(ha1, user, ":", domain, ":", pass, NULL);
2265
fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
2268
(void) fprintf(fp2, "%s", line);
2272
// If new user, just add it
2273
if (!found && pass != NULL) {
2274
mg_md5(ha1, user, ":", domain, ":", pass, NULL);
2275
(void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
2282
// Put the temp file in place of real file
2283
(void) mg_remove(fname);
2284
(void) mg_rename(tmp, fname);
2290
struct mg_connection *conn;
2295
static void url_encode(const char *src, char *dst, size_t dst_len) {
2296
static const char *dont_escape = "._-$,;~()";
2297
static const char *hex = "0123456789abcdef";
2298
const char *end = dst + dst_len - 1;
2300
for (; *src != '\0' && dst < end; src++, dst++) {
2301
if (isalnum(*(const unsigned char *) src) ||
2302
strchr(dont_escape, * (const unsigned char *) src) != NULL) {
2304
} else if (dst + 2 < end) {
2306
dst[1] = hex[(* (const unsigned char *) src) >> 4];
2307
dst[2] = hex[(* (const unsigned char *) src) & 0xf];
2315
static void print_dir_entry(struct de *de) {
2316
char size[64], mod[64], href[PATH_MAX];
2318
if (de->st.is_directory) {
2319
(void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
2321
// We use (signed) cast below because MSVC 6 compiler cannot
2322
// convert unsigned __int64 to double. Sigh.
2323
if (de->st.size < 1024) {
2324
(void) mg_snprintf(de->conn, size, sizeof(size),
2325
"%lu", (unsigned long) de->st.size);
2326
} else if (de->st.size < 1024 * 1024) {
2327
(void) mg_snprintf(de->conn, size, sizeof(size),
2328
"%.1fk", (double) de->st.size / 1024.0);
2329
} else if (de->st.size < 1024 * 1024 * 1024) {
2330
(void) mg_snprintf(de->conn, size, sizeof(size),
2331
"%.1fM", (double) de->st.size / 1048576);
2333
(void) mg_snprintf(de->conn, size, sizeof(size),
2334
"%.1fG", (double) de->st.size / 1073741824);
2337
(void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
2338
url_encode(de->file_name, href, sizeof(href));
2339
de->conn->num_bytes_sent += mg_printf(de->conn,
2340
"<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
2341
"<td> %s</td><td> %s</td></tr>\n",
2342
de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
2343
de->file_name, de->st.is_directory ? "/" : "", mod, size);
2346
// This function is called from send_directory() and used for
2347
// sorting directory entries by size, or name, or modification time.
2348
// On windows, __cdecl specification is needed in case if project is built
2349
// with __stdcall convention. qsort always requires __cdels callback.
2350
static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
2351
const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
2352
const char *query_string = a->conn->request_info.query_string;
2355
if (query_string == NULL) {
2356
query_string = "na";
2359
if (a->st.is_directory && !b->st.is_directory) {
2360
return -1; // Always put directories on top
2361
} else if (!a->st.is_directory && b->st.is_directory) {
2362
return 1; // Always put directories on top
2363
} else if (*query_string == 'n') {
2364
cmp_result = strcmp(a->file_name, b->file_name);
2365
} else if (*query_string == 's') {
2366
cmp_result = a->st.size == b->st.size ? 0 :
2367
a->st.size > b->st.size ? 1 : -1;
2368
} else if (*query_string == 'd') {
2369
cmp_result = a->st.mtime == b->st.mtime ? 0 :
2370
a->st.mtime > b->st.mtime ? 1 : -1;
2373
return query_string[1] == 'd' ? -cmp_result : cmp_result;
2376
static int scan_directory(struct mg_connection *conn, const char *dir,
2377
void *data, void (*cb)(struct de *, void *)) {
2378
char path[PATH_MAX];
2383
if ((dirp = opendir(dir)) == NULL) {
2388
while ((dp = readdir(dirp)) != NULL) {
2389
// Do not show current dir and passwords file
2390
if (!strcmp(dp->d_name, ".") ||
2391
!strcmp(dp->d_name, "..") ||
2392
!strcmp(dp->d_name, PASSWORDS_FILE_NAME))
2395
mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
2397
// If we don't memset stat structure to zero, mtime will have
2398
// garbage and strftime() will segfault later on in
2399
// print_dir_entry(). memset is required only if mg_stat()
2400
// fails. For more details, see
2401
// http://code.google.com/p/mongoose/issues/detail?id=79
2402
if (mg_stat(path, &de.st) != 0) {
2403
memset(&de.st, 0, sizeof(de.st));
2405
de.file_name = dp->d_name;
2409
(void) closedir(dirp);
2414
struct dir_scan_data {
2420
static void dir_scan_callback(struct de *de, void *data) {
2421
struct dir_scan_data *dsd = (struct dir_scan_data *) data;
2423
if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
2425
dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size *
2426
sizeof(dsd->entries[0]));
2428
if (dsd->entries == NULL) {
2429
// TODO(lsm): propagate an error to the caller
2430
dsd->num_entries = 0;
2432
dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
2433
dsd->entries[dsd->num_entries].st = de->st;
2434
dsd->entries[dsd->num_entries].conn = de->conn;
2439
static void handle_directory_request(struct mg_connection *conn,
2441
int i, sort_direction;
2442
struct dir_scan_data data = { NULL, 0, 128 };
2444
if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
2445
send_http_error(conn, 500, "Cannot open directory",
2446
"Error: opendir(%s): %s", dir, strerror(ERRNO));
2450
sort_direction = conn->request_info.query_string != NULL &&
2451
conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
2453
conn->must_close = 1;
2454
mg_printf(conn, "%s",
2455
"HTTP/1.1 200 OK\r\n"
2456
"Connection: close\r\n"
2457
"Content-Type: text/html; charset=utf-8\r\n\r\n");
2459
conn->num_bytes_sent += mg_printf(conn,
2460
"<html><head><title>Index of %s</title>"
2461
"<style>th {text-align: left;}</style></head>"
2462
"<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
2463
"<tr><th><a href=\"?n%c\">Name</a></th>"
2464
"<th><a href=\"?d%c\">Modified</a></th>"
2465
"<th><a href=\"?s%c\">Size</a></th></tr>"
2466
"<tr><td colspan=\"3\"><hr></td></tr>",
2467
conn->request_info.uri, conn->request_info.uri,
2468
sort_direction, sort_direction, sort_direction);
2470
// Print first entry - link to a parent directory
2471
conn->num_bytes_sent += mg_printf(conn,
2472
"<tr><td><a href=\"%s%s\">%s</a></td>"
2473
"<td> %s</td><td> %s</td></tr>\n",
2474
conn->request_info.uri, "..", "Parent directory", "-", "-");
2476
// Sort and print directory entries
2477
qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
2478
compare_dir_entries);
2479
for (i = 0; i < data.num_entries; i++) {
2480
print_dir_entry(&data.entries[i]);
2481
free(data.entries[i].file_name);
2485
conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
2486
conn->request_info.status_code = 200;
2489
// Send len bytes from the opened file to the client.
2490
static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
2492
int to_read, num_read, num_written;
2495
// Calculate how much to read from the file in the buffer
2496
to_read = sizeof(buf);
2497
if ((int64_t) to_read > len)
2498
to_read = (int) len;
2500
// Read from file, exit the loop on error
2501
if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
2504
// Send read bytes to the client, exit the loop on error
2505
if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
2508
// Both read and were successful, adjust counters
2509
conn->num_bytes_sent += num_written;
2514
static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
2515
return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
2518
static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
2519
strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
2522
static void handle_file_request(struct mg_connection *conn, const char *path,
2523
struct mgstat *stp) {
2524
char date[64], lm[64], etag[64], range[64];
2525
const char *msg = "OK", *hdr;
2526
time_t curtime = time(NULL);
2528
struct vec mime_vec;
2532
get_mime_type(conn->ctx, path, &mime_vec);
2534
conn->request_info.status_code = 200;
2537
if ((fp = mg_fopen(path, "rb")) == NULL) {
2538
send_http_error(conn, 500, http_500_error,
2539
"fopen(%s): %s", path, strerror(ERRNO));
2542
set_close_on_exec(fileno(fp));
2544
// If Range: header specified, act accordingly
2546
hdr = mg_get_header(conn, "Range");
2547
if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
2548
conn->request_info.status_code = 206;
2549
(void) fseeko(fp, (off_t) r1, SEEK_SET);
2550
cl = n == 2 ? r2 - r1 + 1: cl - r1;
2551
(void) mg_snprintf(conn, range, sizeof(range),
2552
"Content-Range: bytes "
2554
INT64_FMT "/%" INT64_FMT "\r\n",
2555
r1, r1 + cl - 1, stp->size);
2556
msg = "Partial Content";
2559
// Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
2560
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
2561
gmt_time_string(date, sizeof(date), &curtime);
2562
gmt_time_string(lm, sizeof(lm), &stp->mtime);
2563
(void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
2564
(unsigned long) stp->mtime, (unsigned long) stp->size);
2566
(void) mg_printf(conn,
2567
"HTTP/1.1 %d %s\r\n"
2569
"Last-Modified: %s\r\n"
2571
"Content-Type: %.*s\r\n"
2572
"Content-Length: %" INT64_FMT "\r\n"
2573
"Connection: %s\r\n"
2574
"Accept-Ranges: bytes\r\n"
2576
conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len,
2577
mime_vec.ptr, cl, suggest_connection_header(conn), range);
2579
if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
2580
send_file_data(conn, fp, cl);
2585
void mg_send_file(struct mg_connection *conn, const char *path) {
2587
if (mg_stat(path, &st) == 0) {
2588
handle_file_request(conn, path, &st);
2590
send_http_error(conn, 404, "Not Found", "%s", "File not found");
2595
// Parse HTTP headers from the given buffer, advance buffer to the point
2596
// where parsing stopped.
2597
static void parse_http_headers(char **buf, struct mg_request_info *ri) {
2600
for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
2601
ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
2602
ri->http_headers[i].value = skip(buf, "\r\n");
2603
if (ri->http_headers[i].name[0] == '\0')
2605
ri->num_headers = i + 1;
2609
static int is_valid_http_method(const char *method) {
2610
return !strcmp(method, "GET") || !strcmp(method, "POST") ||
2611
!strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
2612
!strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
2613
!strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
2616
// Parse HTTP request, fill in mg_request_info structure.
2617
static int parse_http_request(char *buf, struct mg_request_info *ri) {
2620
// RFC says that all initial whitespaces should be ingored
2621
while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
2625
ri->request_method = skip(&buf, " ");
2626
ri->uri = skip(&buf, " ");
2627
ri->http_version = skip(&buf, "\r\n");
2629
if (is_valid_http_method(ri->request_method) &&
2630
strncmp(ri->http_version, "HTTP/", 5) == 0) {
2631
ri->http_version += 5; // Skip "HTTP/"
2632
parse_http_headers(&buf, ri);
2639
// Keep reading the input (either opened file descriptor fd, or socket sock,
2640
// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
2641
// buffer (which marks the end of HTTP request). Buffer buf may already
2642
// have some data. The length of the data is stored in nread.
2643
// Upon every read operation, increase nread by the number of bytes read.
2644
static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
2649
while (*nread < bufsiz && request_len == 0) {
2650
n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread);
2655
request_len = get_request_len(buf, *nread);
2662
// For given directory path, substitute it to valid index file.
2663
// Return 0 if index file has been found, -1 if not found.
2664
// If the file is found, it's stats is returned in stp.
2665
static int substitute_index_file(struct mg_connection *conn, char *path,
2666
size_t path_len, struct mgstat *stp) {
2667
const char *list = conn->ctx->config[INDEX_FILES];
2669
struct vec filename_vec;
2670
size_t n = strlen(path);
2673
// The 'path' given to us points to the directory. Remove all trailing
2674
// directory separator characters from the end of the path, and
2675
// then append single directory separator character.
2676
while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
2681
// Traverse index files list. For each entry, append it to the given
2682
// path and see if the file exists. If it exists, break the loop
2683
while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
2685
// Ignore too long entries that may overflow path buffer
2686
if (filename_vec.len > path_len - (n + 2))
2689
// Prepare full path to the index file
2690
(void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
2693
if (mg_stat(path, &st) == 0) {
2694
// Yes it does, break the loop
2701
// If no index file exists, restore directory path
2709
// Return True if we should reply 304 Not Modified.
2710
static int is_not_modified(const struct mg_connection *conn,
2711
const struct mgstat *stp) {
2712
const char *ims = mg_get_header(conn, "If-Modified-Since");
2713
return ims != NULL && stp->mtime <= parse_date_string(ims);
2716
static int forward_body_data(struct mg_connection *conn, FILE *fp,
2717
SOCKET sock, SSL *ssl) {
2718
const char *expect, *buffered;
2720
int to_read, nread, buffered_len, success = 0;
2722
expect = mg_get_header(conn, "Expect");
2725
if (conn->content_len == -1) {
2726
send_http_error(conn, 411, "Length Required", "");
2727
} else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
2728
send_http_error(conn, 417, "Expectation Failed", "");
2730
if (expect != NULL) {
2731
(void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
2734
buffered = conn->buf + conn->request_len;
2735
buffered_len = conn->data_len - conn->request_len;
2736
assert(buffered_len >= 0);
2737
assert(conn->consumed_content == 0);
2739
if (buffered_len > 0) {
2740
if ((int64_t) buffered_len > conn->content_len) {
2741
buffered_len = (int) conn->content_len;
2743
push(fp, sock, ssl, buffered, (int64_t) buffered_len);
2744
conn->consumed_content += buffered_len;
2747
while (conn->consumed_content < conn->content_len) {
2748
to_read = sizeof(buf);
2749
if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
2750
to_read = (int) (conn->content_len - conn->consumed_content);
2752
nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
2753
if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
2756
conn->consumed_content += nread;
2759
if (conn->consumed_content == conn->content_len) {
2763
// Each error code path in this function must send an error
2765
send_http_error(conn, 577, http_500_error, "");
2772
#if !defined(NO_CGI)
2773
// This structure helps to create an environment for the spawned CGI program.
2774
// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
2775
// last element must be NULL.
2776
// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
2777
// strings must reside in a contiguous buffer. The end of the buffer is
2778
// marked by two '\0' characters.
2779
// We satisfy both worlds: we create an envp array (which is vars), all
2780
// entries are actually pointers inside buf.
2781
struct cgi_env_block {
2782
struct mg_connection *conn;
2783
char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
2784
int len; // Space taken
2785
char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
2786
int nvars; // Number of variables
2789
// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
2790
// pointer into the vars array.
2791
static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
2796
// Calculate how much space is left in the buffer
2797
space = sizeof(block->buf) - block->len - 2;
2800
// Make a pointer to the free space int the buffer
2801
added = block->buf + block->len;
2803
// Copy VARIABLE=VALUE\0 string into the free space
2805
n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
2808
// Make sure we do not overflow buffer and the envp array
2809
if (n > 0 && n < space &&
2810
block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
2811
// Append a pointer to the added string into the envp array
2812
block->vars[block->nvars++] = block->buf + block->len;
2813
// Bump up used length counter. Include \0 terminator
2814
block->len += n + 1;
2820
static void prepare_cgi_environment(struct mg_connection *conn,
2822
struct cgi_env_block *blk) {
2823
const char *s, *slash;
2825
char *p, src_addr[20];
2828
blk->len = blk->nvars = 0;
2830
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
2832
addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
2833
addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
2834
addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
2836
// Prepare the environment block
2837
addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
2838
addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
2839
addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
2841
// TODO(lsm): fix this for IPv6 case
2842
addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
2844
addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
2845
addenv(blk, "REMOTE_ADDR=%s", src_addr);
2846
addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
2847
addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
2850
assert(conn->request_info.uri[0] == '/');
2851
slash = strrchr(conn->request_info.uri, '/');
2852
if ((s = strrchr(prog, '/')) == NULL)
2854
addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
2855
conn->request_info.uri, s);
2857
addenv(blk, "SCRIPT_FILENAME=%s", prog);
2858
addenv(blk, "PATH_TRANSLATED=%s", prog);
2859
addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
2861
if ((s = mg_get_header(conn, "Content-Type")) != NULL)
2862
addenv(blk, "CONTENT_TYPE=%s", s);
2864
if (conn->request_info.query_string != NULL)
2865
addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
2867
if ((s = mg_get_header(conn, "Content-Length")) != NULL)
2868
addenv(blk, "CONTENT_LENGTH=%s", s);
2870
if ((s = getenv("PATH")) != NULL)
2871
addenv(blk, "PATH=%s", s);
2873
if (conn->path_info != NULL) {
2874
addenv(blk, "PATH_INFO=%s", conn->path_info);
2878
if ((s = getenv("COMSPEC")) != NULL) {
2879
addenv(blk, "COMSPEC=%s", s);
2881
if ((s = getenv("SYSTEMROOT")) != NULL) {
2882
addenv(blk, "SYSTEMROOT=%s", s);
2884
if ((s = getenv("SystemDrive")) != NULL) {
2885
addenv(blk, "SystemDrive=%s", s);
2888
if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
2889
addenv(blk, "LD_LIBRARY_PATH=%s", s);
2892
if ((s = getenv("PERLLIB")) != NULL)
2893
addenv(blk, "PERLLIB=%s", s);
2895
if (conn->request_info.remote_user != NULL) {
2896
addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
2897
addenv(blk, "%s", "AUTH_TYPE=Digest");
2900
// Add all headers as HTTP_* variables
2901
for (i = 0; i < conn->request_info.num_headers; i++) {
2902
p = addenv(blk, "HTTP_%s=%s",
2903
conn->request_info.http_headers[i].name,
2904
conn->request_info.http_headers[i].value);
2906
// Convert variable name into uppercase, and change - to _
2907
for (; *p != '=' && *p != '\0'; p++) {
2910
*p = (char) toupper(* (unsigned char *) p);
2914
// Add user-specified variables
2915
s = conn->ctx->config[CGI_ENVIRONMENT];
2916
while ((s = next_option(s, &var_vec, NULL)) != NULL) {
2917
addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
2920
blk->vars[blk->nvars++] = NULL;
2921
blk->buf[blk->len++] = '\0';
2923
assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
2924
assert(blk->len > 0);
2925
assert(blk->len < (int) sizeof(blk->buf));
2928
static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
2929
int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
2930
const char *status, *status_text;
2931
char buf[BUFSIZ], *pbuf, dir[PATH_MAX], *p;
2932
struct mg_request_info ri;
2933
struct cgi_env_block blk;
2937
prepare_cgi_environment(conn, prog, &blk);
2939
// CGI must be executed in its own directory. 'dir' must point to the
2940
// directory containing executable program, 'p' must point to the
2941
// executable program name relative to 'dir'.
2942
(void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
2943
if ((p = strrchr(dir, DIRSEP)) != NULL) {
2946
dir[0] = '.', dir[1] = '\0';
2951
fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
2954
if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
2955
send_http_error(conn, 500, http_500_error,
2956
"Cannot create CGI pipe: %s", strerror(ERRNO));
2958
} else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
2959
fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
2961
} else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
2962
(out = fdopen(fd_stdout[0], "rb")) == NULL) {
2963
send_http_error(conn, 500, http_500_error,
2964
"fopen: %s", strerror(ERRNO));
2971
// spawn_process() must close those!
2972
// If we don't mark them as closed, close() attempt before
2973
// return from this function throws an exception on Windows.
2974
// Windows does not like when closed descriptor is closed again.
2975
fd_stdin[0] = fd_stdout[1] = -1;
2977
// Send POST data to the CGI process if needed
2978
if (!strcmp(conn->request_info.request_method, "POST") &&
2979
!forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
2983
// Now read CGI reply into a buffer. We need to set correct
2984
// status code, thus we need to see all HTTP headers first.
2985
// Do not send anything back to client, until we buffer in all
2988
headers_len = read_request(out, INVALID_SOCKET, NULL,
2989
buf, sizeof(buf), &data_len);
2990
if (headers_len <= 0) {
2991
send_http_error(conn, 500, http_500_error,
2992
"CGI program sent malformed HTTP headers: [%.*s]",
2997
buf[headers_len - 1] = '\0';
2998
parse_http_headers(&pbuf, &ri);
3000
// Make up and send the status line
3002
if ((status = get_header(&ri, "Status")) != NULL) {
3003
conn->request_info.status_code = atoi(status);
3004
status_text = status;
3005
while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
3008
} else if (get_header(&ri, "Location") != NULL) {
3009
conn->request_info.status_code = 302;
3011
conn->request_info.status_code = 200;
3013
if (get_header(&ri, "Connection") != NULL &&
3014
!mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
3015
conn->must_close = 1;
3017
(void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code,
3021
for (i = 0; i < ri.num_headers; i++) {
3022
mg_printf(conn, "%s: %s\r\n",
3023
ri.http_headers[i].name, ri.http_headers[i].value);
3025
(void) mg_write(conn, "\r\n", 2);
3027
// Send chunk of data that may be read after the headers
3028
conn->num_bytes_sent += mg_write(conn, buf + headers_len,
3029
(size_t)(data_len - headers_len));
3031
// Read the rest of CGI output and send to the client
3032
send_file_data(conn, out, INT64_MAX);
3035
if (pid != (pid_t) -1) {
3038
if (fd_stdin[0] != -1) {
3039
(void) close(fd_stdin[0]);
3041
if (fd_stdout[1] != -1) {
3042
(void) close(fd_stdout[1]);
3047
} else if (fd_stdin[1] != -1) {
3048
(void) close(fd_stdin[1]);
3053
} else if (fd_stdout[0] != -1) {
3054
(void) close(fd_stdout[0]);
3059
// For a given PUT path, create all intermediate subdirectories
3060
// for given path. Return 0 if the path itself is a directory,
3061
// or -1 on error, 1 if OK.
3062
static int put_dir(const char *path) {
3068
for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
3070
if (len >= (int) sizeof(buf)) {
3074
memcpy(buf, path, len);
3077
// Try to create intermediate directory
3078
DEBUG_TRACE(("mkdir(%s)", buf));
3079
if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
3084
// Is path itself a directory?
3093
static void put_file(struct mg_connection *conn, const char *path) {
3100
conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
3102
if ((rc = put_dir(path)) == 0) {
3103
mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
3104
} else if (rc == -1) {
3105
send_http_error(conn, 500, http_500_error,
3106
"put_dir(%s): %s", path, strerror(ERRNO));
3107
} else if ((fp = mg_fopen(path, "wb+")) == NULL) {
3108
send_http_error(conn, 500, http_500_error,
3109
"fopen(%s): %s", path, strerror(ERRNO));
3111
set_close_on_exec(fileno(fp));
3112
range = mg_get_header(conn, "Content-Range");
3114
if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
3115
conn->request_info.status_code = 206;
3116
// TODO(lsm): handle seek error
3117
(void) fseeko(fp, (off_t) r1, SEEK_SET);
3119
if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
3120
(void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
3121
conn->request_info.status_code);
3126
static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
3128
static void do_ssi_include(struct mg_connection *conn, const char *ssi,
3129
char *tag, int include_level) {
3130
char file_name[BUFSIZ], path[PATH_MAX], *p;
3133
// sscanf() is safe here, since send_ssi_file() also uses buffer
3134
// of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ.
3135
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
3136
// File name is relative to the webserver root
3137
(void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
3138
conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name);
3139
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
3140
// File name is relative to the webserver working directory
3141
// or it is absolute system path
3142
(void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
3143
} else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
3144
// File name is relative to the currect document
3145
(void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
3146
if ((p = strrchr(path, DIRSEP)) != NULL) {
3149
(void) mg_snprintf(conn, path + strlen(path),
3150
sizeof(path) - strlen(path), "%s", file_name);
3152
cry(conn, "Bad SSI #include: [%s]", tag);
3156
if ((fp = mg_fopen(path, "rb")) == NULL) {
3157
cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
3158
tag, path, strerror(ERRNO));
3160
set_close_on_exec(fileno(fp));
3161
if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
3162
strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
3163
send_ssi_file(conn, path, fp, include_level + 1);
3165
send_file_data(conn, fp, INT64_MAX);
3171
#if !defined(NO_POPEN)
3172
static void do_ssi_exec(struct mg_connection *conn, char *tag) {
3176
if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
3177
cry(conn, "Bad SSI #exec: [%s]", tag);
3178
} else if ((fp = popen(cmd, "r")) == NULL) {
3179
cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
3181
send_file_data(conn, fp, INT64_MAX);
3187
static void send_ssi_file(struct mg_connection *conn, const char *path,
3188
FILE *fp, int include_level) {
3190
int ch, len, in_ssi_tag;
3192
if (include_level > 10) {
3193
cry(conn, "SSI #include level is too deep (%s)", path);
3200
while ((ch = fgetc(fp)) != EOF) {
3201
if (in_ssi_tag && ch == '>') {
3203
buf[len++] = (char) ch;
3205
assert(len <= (int) sizeof(buf));
3206
if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
3207
// Not an SSI tag, pass it
3208
(void) mg_write(conn, buf, (size_t)len);
3210
if (!memcmp(buf + 5, "include", 7)) {
3211
do_ssi_include(conn, path, buf + 12, include_level);
3212
#if !defined(NO_POPEN)
3213
} else if (!memcmp(buf + 5, "exec", 4)) {
3214
do_ssi_exec(conn, buf + 9);
3217
cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
3221
} else if (in_ssi_tag) {
3222
if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
3225
} else if (len == (int) sizeof(buf) - 2) {
3226
cry(conn, "%s: SSI tag is too large", path);
3229
buf[len++] = ch & 0xff;
3230
} else if (ch == '<') {
3233
(void) mg_write(conn, buf, (size_t)len);
3236
buf[len++] = ch & 0xff;
3238
buf[len++] = ch & 0xff;
3239
if (len == (int) sizeof(buf)) {
3240
(void) mg_write(conn, buf, (size_t)len);
3246
// Send the rest of buffered data
3248
(void) mg_write(conn, buf, (size_t)len);
3252
static void handle_ssi_file_request(struct mg_connection *conn,
3256
if ((fp = mg_fopen(path, "rb")) == NULL) {
3257
send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
3260
conn->must_close = 1;
3261
set_close_on_exec(fileno(fp));
3262
mg_printf(conn, "HTTP/1.1 200 OK\r\n"
3263
"Content-Type: text/html\r\nConnection: %s\r\n\r\n",
3264
suggest_connection_header(conn));
3265
send_ssi_file(conn, path, fp, 0);
3270
static void send_options(struct mg_connection *conn) {
3271
conn->request_info.status_code = 200;
3273
(void) mg_printf(conn,
3274
"HTTP/1.1 200 OK\r\n"
3275
"Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n"
3279
// Writes PROPFIND properties for a collection element
3280
static void print_props(struct mg_connection *conn, const char* uri,
3281
struct mgstat* st) {
3283
gmt_time_string(mtime, sizeof(mtime), &st->mtime);
3284
conn->num_bytes_sent += mg_printf(conn,
3286
"<d:href>%s</d:href>"
3289
"<d:resourcetype>%s</d:resourcetype>"
3290
"<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
3291
"<d:getlastmodified>%s</d:getlastmodified>"
3293
"<d:status>HTTP/1.1 200 OK</d:status>"
3297
st->is_directory ? "<d:collection/>" : "",
3302
static void print_dav_dir_entry(struct de *de, void *data) {
3303
char href[PATH_MAX];
3304
struct mg_connection *conn = (struct mg_connection *) data;
3305
mg_snprintf(conn, href, sizeof(href), "%s%s",
3306
conn->request_info.uri, de->file_name);
3307
print_props(conn, href, &de->st);
3310
static void handle_propfind(struct mg_connection *conn, const char* path,
3311
struct mgstat* st) {
3312
const char *depth = mg_get_header(conn, "Depth");
3314
conn->must_close = 1;
3315
conn->request_info.status_code = 207;
3316
mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
3317
"Connection: close\r\n"
3318
"Content-Type: text/xml; charset=utf-8\r\n\r\n");
3320
conn->num_bytes_sent += mg_printf(conn,
3321
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
3322
"<d:multistatus xmlns:d='DAV:'>\n");
3324
// Print properties for the requested resource itself
3325
print_props(conn, conn->request_info.uri, st);
3327
// If it is a directory, print directory entries too if Depth is not 0
3328
if (st->is_directory &&
3329
!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
3330
(depth == NULL || strcmp(depth, "0") != 0)) {
3331
scan_directory(conn, path, conn, &print_dav_dir_entry);
3334
conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
3337
// This is the heart of the Mongoose's logic.
3338
// This function is called when the request is read, parsed and validated,
3339
// and Mongoose must decide what action to take: serve a file, or
3340
// a directory, or call embedded function, etcetera.
3341
static void handle_request(struct mg_connection *conn) {
3342
struct mg_request_info *ri = &conn->request_info;
3343
char path[PATH_MAX];
3344
int stat_result, uri_len;
3347
if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
3348
* conn->request_info.query_string++ = '\0';
3350
uri_len = strlen(ri->uri);
3351
url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
3352
remove_double_dots_and_double_slashes(ri->uri);
3353
stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st);
3355
DEBUG_TRACE(("%s", ri->uri));
3356
if (!check_authorization(conn, path)) {
3357
send_authorization_request(conn);
3358
} else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
3359
// Do nothing, callback has served the request
3360
} else if (!strcmp(ri->request_method, "OPTIONS")) {
3362
} else if (strstr(path, PASSWORDS_FILE_NAME)) {
3363
// Do not allow to view passwords files
3364
send_http_error(conn, 403, "Forbidden", "Access Forbidden");
3365
} else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
3366
send_http_error(conn, 404, "Not Found", "Not Found");
3367
} else if ((!strcmp(ri->request_method, "PUT") ||
3368
!strcmp(ri->request_method, "DELETE")) &&
3369
(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
3370
!is_authorized_for_put(conn))) {
3371
send_authorization_request(conn);
3372
} else if (!strcmp(ri->request_method, "PUT")) {
3373
put_file(conn, path);
3374
} else if (!strcmp(ri->request_method, "DELETE")) {
3375
if (mg_remove(path) == 0) {
3376
send_http_error(conn, 200, "OK", "");
3378
send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
3381
} else if (stat_result != 0) {
3382
send_http_error(conn, 404, "Not Found", "%s", "File not found");
3383
} else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
3384
(void) mg_printf(conn,
3385
"HTTP/1.1 301 Moved Permanently\r\n"
3386
"Location: %s/\r\n\r\n", ri->uri);
3387
} else if (!strcmp(ri->request_method, "PROPFIND")) {
3388
handle_propfind(conn, path, &st);
3389
} else if (st.is_directory &&
3390
!substitute_index_file(conn, path, sizeof(path), &st)) {
3391
if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
3392
handle_directory_request(conn, path);
3394
send_http_error(conn, 403, "Directory Listing Denied",
3395
"Directory listing denied");
3397
#if !defined(NO_CGI)
3398
} else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
3399
strlen(conn->ctx->config[CGI_EXTENSIONS]),
3401
if (strcmp(ri->request_method, "POST") &&
3402
strcmp(ri->request_method, "GET")) {
3403
send_http_error(conn, 501, "Not Implemented",
3404
"Method %s is not implemented", ri->request_method);
3406
handle_cgi_request(conn, path);
3409
} else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
3410
strlen(conn->ctx->config[SSI_EXTENSIONS]),
3412
handle_ssi_file_request(conn, path);
3413
} else if (is_not_modified(conn, &st)) {
3414
send_http_error(conn, 304, "Not Modified", "");
3416
handle_file_request(conn, path, &st);
3420
static void close_all_listening_sockets(struct mg_context *ctx) {
3421
struct socket *sp, *tmp;
3422
for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
3424
(void) closesocket(sp->sock);
3429
// Valid listening port specification is: [ip_address:]port[s]
3430
// Examples: 80, 443s, 127.0.0.1:3128,1.2.3.4:8080s
3431
// TODO(lsm): add parsing of the IPv6 address
3432
static int parse_port_string(const struct vec *vec, struct socket *so) {
3433
int a, b, c, d, port, len;
3435
// MacOS needs that. If we do not zero it, subsequent bind() will fail.
3436
// Also, all-zeroes in the socket address means binding to all addresses
3437
// for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
3438
memset(so, 0, sizeof(*so));
3440
if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
3441
// Bind to a specific IPv4 address
3442
so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
3443
} else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 ||
3445
len > (int) vec->len ||
3446
(vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) {
3450
so->is_ssl = vec->ptr[len] == 's';
3451
#if defined(USE_IPV6)
3452
so->lsa.sin6.sin6_family = AF_INET6;
3453
so->lsa.sin6.sin6_port = htons((uint16_t) port);
3455
so->lsa.sin.sin_family = AF_INET;
3456
so->lsa.sin.sin_port = htons((uint16_t) port);
3462
static int set_ports_option(struct mg_context *ctx) {
3463
const char *list = ctx->config[LISTENING_PORTS];
3464
int on = 1, success = 1;
3467
struct socket so, *listener;
3469
while (success && (list = next_option(list, &vec, NULL)) != NULL) {
3470
if (!parse_port_string(&vec, &so)) {
3471
cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
3472
__func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
3474
} else if (so.is_ssl && ctx->ssl_ctx == NULL) {
3475
cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
3477
} else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) ==
3479
#if !defined(_WIN32)
3480
// On Windows, SO_REUSEADDR is recommended only for
3481
// broadcast UDP sockets
3482
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on,
3485
// Set TCP keep-alive. This is needed because if HTTP-level
3486
// keep-alive is enabled, and client resets the connection,
3487
// server won't get TCP FIN or RST and will keep the connection
3488
// open forever. With TCP keep-alive, next keep-alive
3489
// handshake will figure out that the client is down and
3490
// will close the server end.
3491
// Thanks to Igor Klopov who suggested the patch.
3492
setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on,
3494
bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 ||
3495
listen(sock, 100) != 0) {
3497
cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
3498
vec.len, vec.ptr, strerror(ERRNO));
3500
} else if ((listener = (struct socket *)
3501
calloc(1, sizeof(*listener))) == NULL) {
3503
cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
3507
listener->sock = sock;
3508
set_close_on_exec(listener->sock);
3509
listener->next = ctx->listening_sockets;
3510
ctx->listening_sockets = listener;
3515
close_all_listening_sockets(ctx);
3520
static void log_header(const struct mg_connection *conn, const char *header,
3522
const char *header_value;
3524
if ((header_value = mg_get_header(conn, header)) == NULL) {
3525
(void) fprintf(fp, "%s", " -");
3527
(void) fprintf(fp, " \"%s\"", header_value);
3531
static void log_access(const struct mg_connection *conn) {
3532
const struct mg_request_info *ri;
3534
char date[64], src_addr[20];
3536
fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL :
3537
mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
3542
strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
3543
localtime(&conn->birth_time));
3545
ri = &conn->request_info;
3548
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
3549
fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
3550
src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date,
3551
ri->request_method ? ri->request_method : "-",
3552
ri->uri ? ri->uri : "-", ri->http_version,
3553
conn->request_info.status_code, conn->num_bytes_sent);
3554
log_header(conn, "Referer", fp);
3555
log_header(conn, "User-Agent", fp);
3563
static int isbyte(int n) {
3564
return n >= 0 && n <= 255;
3567
// Verify given socket address against the ACL.
3568
// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
3569
static int check_acl(struct mg_context *ctx, const union usa *usa) {
3570
int a, b, c, d, n, mask, allowed;
3572
uint32_t acl_subnet, acl_mask, remote_ip;
3574
const char *list = ctx->config[ACCESS_CONTROL_LIST];
3580
(void) memcpy(&remote_ip, &usa->sin.sin_addr, sizeof(remote_ip));
3582
// If any ACL is set, deny by default
3585
while ((list = next_option(list, &vec, NULL)) != NULL) {
3588
if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
3589
cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
3591
} else if (flag != '+' && flag != '-') {
3592
cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
3594
} else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
3595
cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
3597
} else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
3598
// Do nothing, no mask specified
3599
} else if (mask < 0 || mask > 32) {
3600
cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
3604
acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
3605
acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
3607
if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
3612
return allowed == '+';
3615
static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
3617
if (fd > (SOCKET) *max_fd) {
3622
#if !defined(_WIN32)
3623
static int set_uid_option(struct mg_context *ctx) {
3625
const char *uid = ctx->config[RUN_AS_USER];
3631
if ((pw = getpwnam(uid)) == NULL) {
3632
cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
3633
} else if (setgid(pw->pw_gid) == -1) {
3634
cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
3635
} else if (setuid(pw->pw_uid) == -1) {
3636
cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
3646
#if !defined(NO_SSL)
3647
static pthread_mutex_t *ssl_mutexes;
3649
static void ssl_locking_callback(int mode, int mutex_num, const char *file,
3652
file = NULL; // Unused
3654
if (mode & CRYPTO_LOCK) {
3655
(void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
3657
(void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
3661
static unsigned long ssl_id_callback(void) {
3662
return (unsigned long) pthread_self();
3665
#if !defined(NO_SSL_DL)
3666
static int load_dll(struct mg_context *ctx, const char *dll_name,
3667
struct ssl_func *sw) {
3668
union {void *p; void (*fp)(void);} u;
3670
struct ssl_func *fp;
3672
if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
3673
cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
3677
for (fp = sw; fp->name != NULL; fp++) {
3679
// GetProcAddress() returns pointer to function
3680
u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
3682
// dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
3683
// function pointers. We need to use a union to make a cast.
3684
u.p = dlsym(dll_handle, fp->name);
3687
cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
3698
// Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
3699
static int set_ssl_option(struct mg_context *ctx) {
3700
struct mg_request_info request_info;
3703
const char *pem = ctx->config[SSL_CERTIFICATE];
3704
const char *chain = ctx->config[SSL_CHAIN_FILE];
3710
#if !defined(NO_SSL_DL)
3711
if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
3712
!load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
3717
// Initialize SSL crap
3719
SSL_load_error_strings();
3721
if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) {
3722
cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
3723
} else if (ctx->user_callback != NULL) {
3724
memset(&request_info, 0, sizeof(request_info));
3725
request_info.user_data = ctx->user_data;
3726
ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX,
3730
if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem,
3731
SSL_FILETYPE_PEM) == 0) {
3732
cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
3734
} else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem,
3735
SSL_FILETYPE_PEM) == 0) {
3736
cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error());
3740
if (CTX != NULL && chain != NULL &&
3741
SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) {
3742
cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error());
3746
// Initialize locking callbacks, needed for thread safety.
3747
// http://www.openssl.org/support/faq.html#PROG1
3748
size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
3749
if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
3750
cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
3754
for (i = 0; i < CRYPTO_num_locks(); i++) {
3755
pthread_mutex_init(&ssl_mutexes[i], NULL);
3758
CRYPTO_set_locking_callback(&ssl_locking_callback);
3759
CRYPTO_set_id_callback(&ssl_id_callback);
3761
// Done with everything. Save the context.
3767
static void uninitialize_ssl(struct mg_context *ctx) {
3769
if (ctx->ssl_ctx != NULL) {
3770
CRYPTO_set_locking_callback(NULL);
3771
for (i = 0; i < CRYPTO_num_locks(); i++) {
3772
pthread_mutex_destroy(&ssl_mutexes[i]);
3774
CRYPTO_set_locking_callback(NULL);
3775
CRYPTO_set_id_callback(NULL);
3780
static int set_gpass_option(struct mg_context *ctx) {
3781
struct mgstat mgstat;
3782
const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
3783
return path == NULL || mg_stat(path, &mgstat) == 0;
3786
static int set_acl_option(struct mg_context *ctx) {
3788
return check_acl(ctx, &fake) != -1;
3791
static void reset_per_request_attributes(struct mg_connection *conn) {
3792
struct mg_request_info *ri = &conn->request_info;
3794
// Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
3795
ri->remote_user = ri->request_method = ri->uri = ri->http_version =
3796
conn->path_info = NULL;
3797
ri->num_headers = 0;
3798
ri->status_code = -1;
3800
conn->num_bytes_sent = conn->consumed_content = 0;
3801
conn->content_len = -1;
3802
conn->request_len = conn->data_len = 0;
3803
conn->must_close = 0;
3806
static void close_socket_gracefully(SOCKET sock) {
3808
struct linger linger;
3811
// Set linger option to avoid socket hanging out after close. This prevent
3812
// ephemeral port exhaust problem under high QPS.
3814
linger.l_linger = 1;
3815
setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger, sizeof(linger));
3817
// Send FIN to the client
3818
(void) shutdown(sock, SHUT_WR);
3819
set_non_blocking_mode(sock);
3821
// Read and discard pending data. If we do not do that and close the
3822
// socket, the data in the send buffer may be discarded. This
3823
// behaviour is seen on Windows, when client keeps sending data
3824
// when server decide to close the connection; then when client
3825
// does recv() it gets no data back.
3827
n = pull(NULL, sock, NULL, buf, sizeof(buf));
3830
// Now we know that our FIN is ACK-ed, safe to close
3831
(void) closesocket(sock);
3834
static void close_connection(struct mg_connection *conn) {
3836
SSL_free(conn->ssl);
3840
if (conn->client.sock != INVALID_SOCKET) {
3841
close_socket_gracefully(conn->client.sock);
3845
static void discard_current_request_from_buffer(struct mg_connection *conn) {
3847
int buffered_len, body_len;
3849
buffered = conn->buf + conn->request_len;
3850
buffered_len = conn->data_len - conn->request_len;
3851
assert(buffered_len >= 0);
3853
if (conn->content_len == -1) {
3855
} else if (conn->content_len < (int64_t) buffered_len) {
3856
body_len = (int) conn->content_len;
3858
body_len = buffered_len;
3861
conn->data_len -= conn->request_len + body_len;
3862
memmove(conn->buf, conn->buf + conn->request_len + body_len,
3863
(size_t) conn->data_len);
3866
static int is_valid_uri(const char *uri) {
3867
// Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
3868
// URI can be an asterisk (*) or should start with slash.
3869
return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
3872
static void process_new_connection(struct mg_connection *conn) {
3873
struct mg_request_info *ri = &conn->request_info;
3874
int keep_alive_enabled;
3877
keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
3880
reset_per_request_attributes(conn);
3882
// If next request is not pipelined, read it in
3883
if ((conn->request_len = get_request_len(conn->buf, conn->data_len)) == 0) {
3884
conn->request_len = read_request(NULL, conn->client.sock, conn->ssl,
3885
conn->buf, conn->buf_size, &conn->data_len);
3887
assert(conn->data_len >= conn->request_len);
3888
if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
3889
send_http_error(conn, 413, "Request Too Large", "");
3891
} if (conn->request_len <= 0) {
3892
return; // Remote end closed the connection
3895
// Nul-terminate the request cause parse_http_request() uses sscanf
3896
conn->buf[conn->request_len - 1] = '\0';
3897
if (!parse_http_request(conn->buf, ri) || !is_valid_uri(ri->uri)) {
3898
// Do not put garbage in the access log, just send it back to the client
3899
send_http_error(conn, 400, "Bad Request",
3900
"Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
3901
} else if (strcmp(ri->http_version, "1.0") &&
3902
strcmp(ri->http_version, "1.1")) {
3903
// Request seems valid, but HTTP version is strange
3904
send_http_error(conn, 505, "HTTP version not supported", "");
3907
// Request is valid, handle it
3908
cl = get_header(ri, "Content-Length");
3909
conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
3910
conn->birth_time = time(NULL);
3911
handle_request(conn);
3912
call_user(conn, MG_REQUEST_COMPLETE);
3914
discard_current_request_from_buffer(conn);
3916
if (ri->remote_user != NULL) {
3917
free((void *) ri->remote_user);
3919
} while (conn->ctx->stop_flag == 0 &&
3920
keep_alive_enabled &&
3921
should_keep_alive(conn));
3924
// Worker threads take accepted socket from the queue
3925
static int consume_socket(struct mg_context *ctx, struct socket *sp) {
3926
(void) pthread_mutex_lock(&ctx->mutex);
3927
DEBUG_TRACE(("going idle"));
3929
// If the queue is empty, wait. We're idle at this point.
3930
while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
3931
pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
3934
// If we're stopping, sq_head may be equal to sq_tail.
3935
if (ctx->sq_head > ctx->sq_tail) {
3936
// Copy socket from the queue and increment tail
3937
*sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
3939
DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
3941
// Wrap pointers if needed
3942
while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
3943
ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
3944
ctx->sq_head -= ARRAY_SIZE(ctx->queue);
3948
(void) pthread_cond_signal(&ctx->sq_empty);
3949
(void) pthread_mutex_unlock(&ctx->mutex);
3951
return !ctx->stop_flag;
3954
static void worker_thread(struct mg_context *ctx) {
3955
struct mg_connection *conn;
3956
int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
3958
conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size);
3960
cry(fc(ctx), "%s", "Cannot create new connection struct, OOM");
3963
conn->buf_size = buf_size;
3964
conn->buf = (char *) (conn + 1);
3966
// Call consume_socket() even when ctx->stop_flag > 0, to let it signal
3967
// sq_empty condvar to wake up the master waiting in produce_socket()
3968
while (consume_socket(ctx, &conn->client)) {
3969
conn->birth_time = time(NULL);
3972
// Fill in IP, port info early so even if SSL setup below fails,
3973
// error handler would have the corresponding info.
3974
// Thanks to Johannes Winkelmann for the patch.
3975
// TODO(lsm): Fix IPv6 case
3976
conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port);
3977
memcpy(&conn->request_info.remote_ip,
3978
&conn->client.rsa.sin.sin_addr.s_addr, 4);
3979
conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
3980
conn->request_info.is_ssl = conn->client.is_ssl;
3982
if (!conn->client.is_ssl ||
3983
(conn->client.is_ssl && sslize(conn, SSL_accept))) {
3984
process_new_connection(conn);
3987
close_connection(conn);
3991
// Signal master that we're done with connection and exiting
3992
(void) pthread_mutex_lock(&ctx->mutex);
3994
(void) pthread_cond_signal(&ctx->cond);
3995
assert(ctx->num_threads >= 0);
3996
(void) pthread_mutex_unlock(&ctx->mutex);
3998
DEBUG_TRACE(("exiting"));
4001
// Master thread adds accepted socket to a queue
4002
static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
4003
(void) pthread_mutex_lock(&ctx->mutex);
4005
// If the queue is full, wait
4006
while (ctx->stop_flag == 0 &&
4007
ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
4008
(void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
4011
if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
4012
// Copy socket to the queue and increment head
4013
ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
4015
DEBUG_TRACE(("queued socket %d", sp->sock));
4018
(void) pthread_cond_signal(&ctx->sq_full);
4019
(void) pthread_mutex_unlock(&ctx->mutex);
4022
static void accept_new_connection(const struct socket *listener,
4023
struct mg_context *ctx) {
4024
struct socket accepted;
4029
len = sizeof(accepted.rsa);
4030
accepted.lsa = listener->lsa;
4031
accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len);
4032
if (accepted.sock != INVALID_SOCKET) {
4033
allowed = check_acl(ctx, &accepted.rsa);
4035
// Put accepted socket structure into the queue
4036
DEBUG_TRACE(("accepted socket %d", accepted.sock));
4037
accepted.is_ssl = listener->is_ssl;
4038
produce_socket(ctx, &accepted);
4040
sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa);
4041
cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr);
4042
(void) closesocket(accepted.sock);
4047
static void master_thread(struct mg_context *ctx) {
4053
// Increase priority of the master thread
4055
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
4058
#if defined(ISSUE_317)
4059
struct sched_param sched_param;
4060
sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
4061
pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
4064
while (ctx->stop_flag == 0) {
4068
// Add listening sockets to the read set
4069
for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
4070
add_to_set(sp->sock, &read_set, &max_fd);
4074
tv.tv_usec = 200 * 1000;
4076
if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
4078
// On windows, if read_set and write_set are empty,
4079
// select() returns "Invalid parameter" error
4080
// (at least on my Windows XP Pro). So in this case, we sleep here.
4084
for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
4085
if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) {
4086
accept_new_connection(sp, ctx);
4091
DEBUG_TRACE(("stopping workers"));
4093
// Stop signal received: somebody called mg_stop. Quit.
4094
close_all_listening_sockets(ctx);
4096
// Wakeup workers that are waiting for connections to handle.
4097
pthread_cond_broadcast(&ctx->sq_full);
4099
// Wait until all threads finish
4100
(void) pthread_mutex_lock(&ctx->mutex);
4101
while (ctx->num_threads > 0) {
4102
(void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
4104
(void) pthread_mutex_unlock(&ctx->mutex);
4106
// All threads exited, no sync is needed. Destroy mutex and condvars
4107
(void) pthread_mutex_destroy(&ctx->mutex);
4108
(void) pthread_cond_destroy(&ctx->cond);
4109
(void) pthread_cond_destroy(&ctx->sq_empty);
4110
(void) pthread_cond_destroy(&ctx->sq_full);
4112
#if !defined(NO_SSL)
4113
uninitialize_ssl(ctx);
4116
// Signal mg_stop() that we're done
4119
DEBUG_TRACE(("exiting"));
4122
static void free_context(struct mg_context *ctx) {
4125
// Deallocate config parameters
4126
for (i = 0; i < NUM_OPTIONS; i++) {
4127
if (ctx->config[i] != NULL)
4128
free(ctx->config[i]);
4131
// Deallocate SSL context
4132
if (ctx->ssl_ctx != NULL) {
4133
SSL_CTX_free(ctx->ssl_ctx);
4136
if (ssl_mutexes != NULL) {
4141
// Deallocate context itself
4145
void mg_stop(struct mg_context *ctx) {
4148
// Wait until mg_fini() stops
4149
while (ctx->stop_flag != 2) {
4154
#if defined(_WIN32) && !defined(__SYMBIAN32__)
4155
(void) WSACleanup();
4159
struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
4160
const char **options) {
4161
struct mg_context *ctx;
4162
const char *name, *value, *default_value;
4165
#if defined(_WIN32) && !defined(__SYMBIAN32__)
4167
WSAStartup(MAKEWORD(2,2), &data);
4168
InitializeCriticalSection(&global_log_file_lock);
4171
// Allocate context and initialize reasonable general case defaults.
4172
// TODO(lsm): do proper error handling here.
4173
ctx = (struct mg_context *) calloc(1, sizeof(*ctx));
4174
ctx->user_callback = user_callback;
4175
ctx->user_data = user_data;
4177
while (options && (name = *options++) != NULL) {
4178
if ((i = get_option_index(name)) == -1) {
4179
cry(fc(ctx), "Invalid option: %s", name);
4182
} else if ((value = *options++) == NULL) {
4183
cry(fc(ctx), "%s: option value cannot be NULL", name);
4187
if (ctx->config[i] != NULL) {
4188
cry(fc(ctx), "%s: duplicate option", name);
4190
ctx->config[i] = mg_strdup(value);
4191
DEBUG_TRACE(("[%s] -> [%s]", name, value));
4194
// Set default value if needed
4195
for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
4196
default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
4197
if (ctx->config[i] == NULL && default_value != NULL) {
4198
ctx->config[i] = mg_strdup(default_value);
4199
DEBUG_TRACE(("Setting default: [%s] -> [%s]",
4200
config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
4205
// NOTE(lsm): order is important here. SSL certificates must
4206
// be initialized before listening ports. UID must be set last.
4207
if (!set_gpass_option(ctx) ||
4208
#if !defined(NO_SSL)
4209
!set_ssl_option(ctx) ||
4211
!set_ports_option(ctx) ||
4212
#if !defined(_WIN32)
4213
!set_uid_option(ctx) ||
4215
!set_acl_option(ctx)) {
4220
#if !defined(_WIN32) && !defined(__SYMBIAN32__)
4221
// Ignore SIGPIPE signal, so if browser cancels the request, it
4222
// won't kill the whole process.
4223
(void) signal(SIGPIPE, SIG_IGN);
4224
// Also ignoring SIGCHLD to let the OS to reap zombies properly.
4225
(void) signal(SIGCHLD, SIG_IGN);
4228
(void) pthread_mutex_init(&ctx->mutex, NULL);
4229
(void) pthread_cond_init(&ctx->cond, NULL);
4230
(void) pthread_cond_init(&ctx->sq_empty, NULL);
4231
(void) pthread_cond_init(&ctx->sq_full, NULL);
4233
// Start master (listening) thread
4234
start_thread(ctx, (mg_thread_func_t) master_thread, ctx);
4236
// Start worker threads
4237
for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
4238
if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
4239
cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);