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/*
Copyright © 2015-2016 Gluzskiy Alexandr (sss)
This file is part of Unknown Download Manager (UDM).
UDM 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 2 of the License, or
(at your option) any later version.
UDM 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 UDM. If not, see <http://www.gnu.org/licenses/>.
*/
#include "curl_download.h"
#include <boost/thread.hpp>
#include <boost/log/trivial.hpp>
size_t curl_w_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
{
curl_download *d = (curl_download*)userdata;
if(d->get_cancel_state())
return -1; //cancel transfer
//TODO: implement pause
std::ofstream &of(d->get_ofile());
if(!of.is_open())
{
//TODO: sanity check and path validation
try{
of.open(d->get_download_path(), std::ios::out | std::ios::binary);
}
catch(...) //TODO: handle exception
{
}
}
size_t size_ = size * nmemb;
if(size_)
{
if(of.is_open())
{
try{
of.write(ptr, size_);
}
catch(...) //TODO: handle exception
{
}
}
else
{
return -1;
//TODO: handle error
}
}
return size_;
}
curl_download::curl_download(std::map<int, std::string> params, core_api *a, module_base *m)
{
//for now we use single transfer connection for url
//TODO: support multiple connections in parallel for multithreaded download
easy_handle = curl_easy_init();
if(!easy_handle)
; //TODO: handle error
api = a;
module = m;
curl_easy_setopt(easy_handle, CURLOPT_URL, params[0].c_str()); //Url as set in module_info
curl_easy_setopt(easy_handle, CURLOPT_WRITEFUNCTION, curl_w_callback);
curl_easy_setopt(easy_handle, CURLOPT_WRITEDATA, this);
if(!params[1].empty())
download_path = params[1];
else
{
download_path = api->get_core_settings()["default_download_directory"];
//extract name from url
auto p1 = params[0].rfind("/");
if(p1 != std::string::npos)
{
download_path += "/";
download_path += params[0].substr(p1+1);
}
}
//curl_easy_setopt(h, CURLOPT_DEFAULT_PROTOCOL, "http"); //require curl >= 7.45
}
bool curl_download::start()
{
boost::thread(boost::bind(&curl_download::perform_internal, this));
state = core_events::download_running;
return true; //TODO:
}
bool curl_download::stop()
{
cancel_transfer = true;
state = core_events::download_stopped;
return true; //TODO:
}
bool curl_download::delete_download()
{
cancel_transfer = true;
curl_easy_cleanup(easy_handle);
return true; //TODO:
}
void curl_download::perform_internal()
{
auto status = curl_easy_perform(easy_handle);
if(status != CURLE_OK)
state = core_events::download_error;
else
state = core_events::download_completed;
ofile.close();
{//curl debug
char *url;
curl_easy_getinfo(easy_handle, CURLINFO_EFFECTIVE_URL, &url);
BOOST_LOG_TRIVIAL(debug)<<__FILE__<<":"<<__LINE__<<"\t"<<__func__<<"\nCURLINFO_EFFECTIVE_URL:\t"<<url;
long code = 0;
curl_easy_getinfo(easy_handle, CURLINFO_RESPONSE_CODE, &code);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_RESPONSE_CODE:\t"<<code;
curl_easy_getinfo(easy_handle, CURLINFO_HTTP_CONNECTCODE, &code);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_HTTP_CONNECTCODE:\t"<<code;
curl_easy_getinfo(easy_handle, CURLINFO_REDIRECT_COUNT, &code);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_REDIRECT_COUNT:\t"<<code;
curl_easy_getinfo(easy_handle, CURLINFO_SIZE_DOWNLOAD, &code);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_SIZE_DOWNLOAD:\t"<<code;
curl_easy_getinfo(easy_handle, CURLINFO_HEADER_SIZE, &code);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_HEADER_SIZE:\t"<<code;
double length = 0;
curl_easy_getinfo(easy_handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &length);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_CONTENT_LENGTH_DOWNLOAD:\t"<<length;
curl_easy_getinfo(easy_handle, CURLINFO_CONTENT_TYPE, &url);
BOOST_LOG_TRIVIAL(debug)<<"\nCURLINFO_CONTENT_TYPE:\t"<<url;
std::cout<<std::endl;
}
std::list<core_events::download_state_info> l;
core_events::download_state_info i;
i.download_id = id;
i.state = state;
l.push_back(i);
api->download_state_changed(module, l);
//TODO: save state
}
curl_download::~curl_download()
{
//curl_easy_cleanup(easy_handle); //this crashes for some reason
}
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