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/**************************************************************************
Lightspark, a free flash player implementation
Copyright (C) 2009,2010 Alessandro Pignotti (a.pignotti@sssup.it)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
**************************************************************************/
#include "netutils.h"
#include <curl/curl.h>
#include <string>
#include <iostream>
using namespace lightspark;
CurlDownloader::CurlDownloader(const tiny_string& u):buffer(NULL),len(0),tail(0),failed(false),waiting(false)
{
//TODO: Url encode the string
std::string tmp2;
tmp2.reserve(u.len()*2);
for(int i=0;i<u.len();i++)
{
if(u[i]==' ')
{
char buf[4];
sprintf(buf,"%%%x",(unsigned char)u[i]);
tmp2+=buf;
}
else
tmp2.push_back(u[i]);
}
url=tmp2.c_str();
sem_init(&available,0,0);
sem_init(&mutex,0,1);
}
void CurlDownloader::execute()
{
if(url.len()==0)
{
setFailed();
return;
}
CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl)
{
std::cout << url << std::endl;
curl_easy_setopt(curl, CURLOPT_URL, url.raw_buf());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, write_header);
curl_easy_setopt(curl, CURLOPT_HEADERDATA, this);
res = curl_easy_perform(curl);
if(res!=0)
setFailed();
curl_easy_cleanup(curl);
}
else
setFailed();
return;
}
bool CurlDownloader::download()
{
execute();
return !failed;
}
size_t CurlDownloader::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
{
CurlDownloader* th=static_cast<CurlDownloader*>(userp);
sem_wait(&th->mutex);
memcpy(th->buffer + th->tail,buffer,size*nmemb);
th->tail+=(size*nmemb);
if(th->waiting)
{
th->waiting=false;
assert(size*nmemb);
sem_post(&th->available);
}
else
sem_post(&th->mutex);
return size*nmemb;
}
size_t CurlDownloader::write_header(void *buffer, size_t size, size_t nmemb, void *userp)
{
CurlDownloader* th=static_cast<CurlDownloader*>(userp);
char* headerLine=(char*)buffer;
std::cout << headerLine << std::endl;
if(strncmp(headerLine,"HTTP/1.1 4",10)==0) //HTTP error, let's fail
th->setFailed();
else if(strncmp(headerLine,"Content-Length: ",16)==0)
{
//Now read the length and allocate the byteArray
assert(th->buffer==NULL);
th->len=atoi(headerLine+16);
th->buffer=new uint8_t[th->len];
th->setg((char*)th->buffer,(char*)th->buffer,(char*)th->buffer);
}
return size*nmemb;
}
void CurlDownloader::setFailed()
{
sem_wait(&mutex);
failed=true;
if(waiting) //If we are waiting for some bytes, gives up and return EOF
sem_post(&available);
else
sem_post(&mutex);
}
CurlDownloader::int_type CurlDownloader::underflow()
{
sem_wait(&mutex);
assert(gptr()==egptr());
unsigned int firstIndex=tail;
if((buffer+tail)==(uint8_t*)egptr()) //We have no more bytes
{
if(failed)
{
sem_post(&mutex);
return -1;
}
else
{
waiting=true;
sem_post(&mutex);
sem_wait(&available);
}
}
//The current pointer has to be saved
char* cur=gptr();
if(failed)
{
sem_post(&mutex);
return -1;
}
//We have some bytes now, let's use them
setg((char*)buffer,cur,(char*)buffer+tail);
sem_post(&mutex);
//Cast to signed, otherwise 0xff would become eof
return (unsigned char)buffer[firstIndex];
}
CurlDownloader::pos_type CurlDownloader::seekpos(pos_type pos, std::ios_base::openmode mode)
{
assert(mode==std::ios_base::in);
sem_wait(&mutex);
setg((char*)buffer,(char*)buffer+pos,(char*)buffer+tail);
sem_post(&mutex);
return pos;
}
CurlDownloader::pos_type CurlDownloader::seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode mode)
{
assert(mode==std::ios_base::in);
assert(off==0);
pos_type ret=gptr()-eback();
return ret;
}
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