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//
// bidwatcher
// copyright (c) 1999-2005
// Trent McNair (trent@rmci.net)
// Tom McNair (tmcnair@cyberhighway.net)
// Wayne Schlitt (wayne@midwestcs.com)
// Ben Byer (bushing@users.sourceforge.net)
// Kevin Dwyer (kevin@pheared.net)
//
// use of this code is restricted to the terms
// of the GNU GPL, which should have been included in this
// distribution. If not, see www.gnu.org/copyleft/gpl.html.
// Here is the short version:
//
// 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 2 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.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <gtk/gtk.h>
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>
#include <string>
#include <iostream>
#include "bidwatcher.h"
using namespace std;
// The next two functions are essentially taken from the examples
// that come with the curl library. For speed we don't want to
// start with an empty buffer, so memsize should be larger than size.
struct MemoryBufferStruct {
char *memory; // This is the character array
size_t size; // This is the length of the string
size_t memsize; // This is the actual length of the array
};
size_t WriteMemoryBuffer(void *ptr, size_t size, size_t nmemb, void *data)
{
//DPRINTF(DHIGH, ("WMB: ptr:%#x size:%i nmemb:%i data:%#x\n",
// ptr, size, nmemb, data));
register int realsize = size * nmemb;
struct MemoryBufferStruct *mem = (struct MemoryBufferStruct *)data;
if ((size_t) (realsize) >= (mem->memsize - mem->size)) {
mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
mem->memsize = mem->size + realsize + 1;
}
if (mem->memory) {
memcpy(&(mem->memory[mem->size]), ptr, realsize);
mem->size += realsize; // Update the string length
mem->memory[mem->size] = 0; // Terminate the string with a NULL
}
return realsize;
}
struct MemoryBufferStruct curl_memory_chunk;
bool cancelPressed;
double avg_load_time = INITIAL_LOAD_TIME;
URL::URL(char *newurl, char *postval, URL *proxy) {
DPRINTF(DMED, ("New URL(%s).\n", newurl));
proxyuser = NULL;
proxypass = NULL;
create(newurl, postval, proxy);
}
URL::URL(char *newurl, char *postval, URL *proxy, char *user, char *pass) {
DPRINTF(DMED, ("New URL(%s).\n", newurl));
proxyuser = strdup(user);
proxypass = strdup(pass);
create(newurl, postval, proxy);
}
inline void constFree(const void *ptr)
{
free((void*)ptr);
}
/*
void URL::freeHostInfo(bool free_all)
{
if(!hostinfo) return;
if (hostinfo->h_name)
constFree(hostinfo->h_name);
int i;
for(i=0; i < numaliases; i++)
constFree(hostinfo->h_aliases[i]);
if (i > 0)
constFree(hostinfo->h_aliases);
for(i=0; i < numaddrs; i++)
constFree(hostinfo->h_addr_list[i]);
if (i > 0)
constFree(hostinfo->h_addr_list);
if(free_all)
constFree(hostinfo);
}
*/
URL::~URL() {
// Clean this memory waster up.
DPRINTF(DMED, ("Destroying URL(%s)\n", fullurl));
// If we are using a proxy, don't kill this.
/*if (!useproxy && hostinfo) {
freeHostInfo(true);
}*/
if(proxyuser != NULL) free(proxyuser);
if(proxypass != NULL) free(proxypass);
}
void URL::create(char *newurl, char *postval, URL *proxy) {
sprintf(fullurl, "%s", newurl);
sprintf(fullurlpost, "%s", postval);
string tmp = fullurl;
string hostport;
unsigned int hostStart = strlen("http://");
unsigned int hostEnd;
hostEnd = tmp.find(":", hostStart);
if (hostEnd == string::npos) {
// No port
hostEnd = tmp.find("/", hostStart);
} else {
// There is a port
unsigned int portStart = hostEnd + 1;
unsigned int portEnd = tmp.find("/", hostEnd);
hostport = tmp.substr(portStart, portEnd - portStart);
port = atoi(hostport.c_str());
}
hostname = tmp.substr(hostStart, hostEnd - hostStart);
if (proxy == NULL) {
useproxy = FALSE;
} else {
#ifdef DEBUG_NETWORK
printf("Configured for proxy - host: %s, port: %d\n",
proxy->hostname,
proxy->port);
#endif
useproxy = TRUE;
proxyuser = strdup(proxy->proxyuser);
proxypass = strdup(proxy->proxypass);
}
}
bool checkredir(URL *url, char *buff) {
// We are extracting the URL from a string of the form
// location: http://...
if (stristr(buff,"location: http") != NULL) {
char *loc = stristr(buff,"location: http");
loc = loc + 10;
loc[strcspn(loc,"\r\n")] = '\0';
sprintf(url->fullurl,"%s\n",loc);
return TRUE;
}
// We are extracting the URL from a string of the form
// <meta http-equiv="Refresh" content="0; url = http://...">
// First we seek to the end of the "url =" part, then start
// counting until we hit the ending " mark. Could we just
// link to a regular expression library instead?
if (strstr(buff,"<meta http-equiv=\"Refresh\" content=") != NULL) {
char *loc = stristr(buff,"<meta http-equiv=\"Refresh\" content=");
loc = loc + 35;
while ( (*loc != '\0') && (*loc != '"' ) ){
loc++;
}
if( *loc != '\0' ) loc++;
while ( (*loc != '\0') && (*loc != '=' ) && (*loc != '"' ) ){
loc++;
}
if( *loc == '=' ) loc++;
while (*loc == ' ' ){
loc++;
}
int substring_len = 0;
while ( loc[substring_len] != '\0' && (loc[substring_len]) != '"' ) {
substring_len++;
}
sprintf(url->fullurl,"%.*s\n",substring_len,loc);
return TRUE;
}
return FALSE;
}
int fetchURL(URL *url, int Post, char **Buff, char *cookiejar, int redir)
{
size_t avebuffsize = 1 << 15; // 2 to the 15th power
CURL *curl_handle;
CURLM *multi_handle;
curl_memory_chunk.memory = (char *) malloc(avebuffsize*sizeof(char));
curl_memory_chunk.size = 0;
curl_memory_chunk.memsize = avebuffsize;
// Initialize the curl session
curl_handle = curl_easy_init();
multi_handle = curl_multi_init();
// Return both the headers and the body
curl_easy_setopt(curl_handle, CURLOPT_HEADER, 1);
curl_easy_setopt(curl_handle, CURLOPT_NOBODY, 0);
// Automatically handle all the cookies
curl_easy_setopt(curl_handle, CURLOPT_COOKIEJAR, cookiejar);
curl_easy_setopt(curl_handle, CURLOPT_COOKIEFILE, cookiejar);
// Act like we are the mozilla browser
curl_easy_setopt(curl_handle, CURLOPT_USERAGENT,
"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) "
"Gecko/20040113");
// This next feature doesn't appear to work properly so we follow by hand
curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1);
if (url->useproxy) {
char proxyuserpwd[200];
memset(proxyuserpwd, 0, sizeof proxyuserpwd);
if (strlen(proxyurl->proxyuser)) {
snprintf(proxyuserpwd, sizeof proxyuserpwd - 1, "%s:%s",
proxyurl->proxyuser, proxyurl->proxypass);
curl_easy_setopt(curl_handle, CURLOPT_PROXYUSERPWD, proxyuserpwd);
}
char proxyinfo[200];
memset(proxyinfo, 0, sizeof proxyinfo);
snprintf(proxyinfo, sizeof proxyinfo - 1, "%s:%d",
proxyurl->hostname.c_str(), proxyurl->port);
curl_easy_setopt(curl_handle, CURLOPT_PROXY, proxyinfo);
}
// Set the URL we wish to fetch
curl_easy_setopt(curl_handle, CURLOPT_URL, url->fullurl);
// Follow redirects
curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1);
// If we are posting, set the post fields
if (Post) {
curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDS, url->fullurlpost);
}
// All the data will be sent to this function by curl
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryBuffer);
// We will need our memory buffer to be pass to the write function
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&curl_memory_chunk);
curl_multi_add_handle(multi_handle, curl_handle);
int still_running;
while(CURLM_CALL_MULTI_PERFORM ==
curl_multi_perform(multi_handle, &still_running));
// Now get that URL
while(still_running) {
struct timeval timeout;
int rc; /* select() return code */
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* set a suitable timeout to play around with */
timeout.tv_sec = 0;
timeout.tv_usec = 1;
/* get file descriptors from the transfers */
curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
switch(rc) {
case -1:
/* select error */
break;
case 0:
/* timeout */
default:
/* timeout or readable/writable sockets */
gtk_main_iteration_do(FALSE);
while(CURLM_CALL_MULTI_PERFORM ==
curl_multi_perform(multi_handle, &still_running));
break;
}
}
int remaining_msgs = 1;
int error = 0;
CURLMsg *msg;
while (remaining_msgs) {
msg = curl_multi_info_read(multi_handle, &remaining_msgs);
if (msg != NULL) {
if (CURLE_OK != msg->data.result)
error = 1;
}
}
curl_multi_cleanup(multi_handle);
if (error == 0) {
// If we haven't hit redirect limit, follow any redirects
//if (redir && checkredir(url,curl_memory_chunk.memory)) {
/* cleanup curl stuff */
// curl_easy_cleanup(curl_handle);
// return fetchURL(url, 0, Buff, cookiejar, redir - 1);
//}
// Set the buffer pointer to the curl memory buffer
*Buff = curl_memory_chunk.memory;
/* cleanup curl stuff */
curl_easy_cleanup(curl_handle);
return NET_SUCCESS;
} else {
return NET_NETERROR;
}
}
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