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/*
* Copyright (C) 2009 by Marc Boris Duerner, Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <cxxtools/http/messageheader.h>
#include <cxxtools/clock.h>
#include <cxxtools/log.h>
#include <cctype>
#include <sstream>
#include <stdio.h>
#include <string.h>
log_define("cxxtools.http.messageheader")
namespace cxxtools
{
namespace http
{
namespace
{
int compareIgnoreCase(const char* s1, const char* s2)
{
const char* it1 = s1;
const char* it2 = s2;
while (*it1 && *it2)
{
if (*it1 != *it2)
{
char c1 = std::toupper(*it1);
char c2 = std::toupper(*it2);
if (c1 < c2)
return -1;
else if (c2 < c1)
return 1;
}
++it1;
++it2;
}
return *it1 ? 1
: *it2 ? -1 : 0;
}
}
const char* MessageHeader::getHeader(const char* key) const
{
for (const_iterator it = begin(); it != end(); ++it)
{
if (compareIgnoreCase(key, it->first) == 0)
return it->second;
}
return 0;
}
bool MessageHeader::isHeaderValue(const char* key, const char* value) const
{
const char* h = getHeader(key);
if (h == 0)
return false;
return compareIgnoreCase(h, value) == 0;
}
void MessageHeader::clear()
{
_rawdata[0] = _rawdata[1] = '\0';
_endOffset = 0;
_httpVersionMajor = 1;
_httpVersionMinor = 1;
}
void MessageHeader::setHeader(const char* key, const char* value, bool replace)
{
log_debug("setHeader(\"" << key << "\", \"" << value << "\", " << replace << ')');
if (!*key)
throw std::runtime_error("empty key not allowed in messageheader");
if (replace)
removeHeader(key);
char* p = eptr();
size_t lk = strlen(key); // length of key
size_t lv = strlen(value); // length of value
if (p - _rawdata + lk + lv + 2 > MAXHEADERSIZE)
throw std::runtime_error("message header too big");
std::strcpy(p, key); // copy key
p += lk + 1;
std::strcpy(p, value); // copy value
p[lv + 1] = '\0'; // put new message end marker in place
_endOffset = (p + lv + 1) - _rawdata;
}
void MessageHeader::removeHeader(const char* key)
{
if (!*key)
throw std::runtime_error("empty key not allowed in messageheader");
char* p = eptr();
const_iterator it = begin();
while (it != end())
{
if (compareIgnoreCase(key, it->first) == 0)
{
unsigned slen = it->second - it->first + std::strlen(it->second) + 1;
std::memcpy(
const_cast<char*>(it->first),
it->first + slen,
p - it->first + slen);
p -= slen;
it.fixup();
}
else
++it;
}
_endOffset = p - _rawdata;
}
bool MessageHeader::chunkedTransferEncoding() const
{
return isHeaderValue("Transfer-Encoding", "chunked");
}
std::size_t MessageHeader::contentLength() const
{
const char* s = getHeader("Content-Length");
if (s == 0)
return 0;
std::size_t size = 0;
while (*s >= '0' && *s <= '9')
size = size * 10 + (*s++ - '0');
return size;
}
bool MessageHeader::keepAlive() const
{
const char* ch = getHeader("Connection");
if (ch == 0)
return httpVersionMajor() == 1
&& httpVersionMinor() >= 1;
else
return compareIgnoreCase(ch, "keep-alive") == 0;
}
char* MessageHeader::htdateCurrent(char* buffer)
{
int year = 0;
unsigned month = 0;
unsigned day = 0;
unsigned hour = 0;
unsigned min = 0;
unsigned sec = 0;
unsigned msec = 0;
DateTime dt = Clock::getSystemTime();
dt.get(year, month, day, hour, min, sec, msec);
unsigned dayOfWeek = dt.date().dayOfWeek();
static const char* wday[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
static const char* monthn[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
sprintf(buffer, "%s, %02d %s %d %02d:%02d:%02d GMT",
wday[dayOfWeek], day, monthn[month-1], year, hour, min, sec);
return buffer;
}
} // namespace http
} // namespace cxxtools
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