src/curl_download.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <unistd.h>
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <gtk/gtk.h>
  29
  30 #include <curl/curl.h>
  31
  32 #include "file.h"
  33 #include "curl_download.h"
  34
  35 static gchar *get_cookie_file(gboolean init)
  36 {
  37   static gchar *cookie_file = NULL;
  38   static GMutex *mutex = NULL;
  39
  40   if (init) { /* to make sure  it's thread safe */
  41     mutex = g_mutex_new();
  42     static gchar *cookie_fn = "cookies.txt";
  43     const gchar *viking_dir = a_get_viking_dir();
  44     cookie_file = g_strdup_printf("%s/%s", viking_dir, cookie_fn);
  45     unlink(cookie_file);
  46     return NULL;
  47   }
  48
  49   g_assert(cookie_file != NULL);
  50
  51   g_mutex_lock(mutex);
  52   if (access(cookie_file, F_OK)) {  /* file not there */
  53     FILE * out_file = fopen("/dev/null", "w");
  54     CURLcode res;
  55     CURL *curl = curl_easy_init();
  56     curl_easy_setopt(curl, CURLOPT_URL, "http://maps.google.com/"); /* google.com sets "PREF" cookie */
  57     curl_easy_setopt ( curl, CURLOPT_FILE, out_file );
  58     curl_easy_setopt(curl, CURLOPT_COOKIEJAR, cookie_file);
  59     res = curl_easy_perform(curl);
  60     if (res != CURLE_OK) {
  61       g_warning("%s() Curl perform failed: %s\n", __PRETTY_FUNCTION__,
  62           curl_easy_strerror(res));
  63       unlink(cookie_file);
  64     }
  65     curl_easy_cleanup(curl);
  66   }
  67   g_mutex_unlock(mutex);
  68
  69   return(cookie_file);
  70 }
  71
  72 /* This should to be called from main() to make sure thread safe */
  73 void curl_download_init()
  74 {
  75   curl_global_init(CURL_GLOBAL_ALL);
  76   get_cookie_file(TRUE);
  77 }
  78
  79 int curl_download_uri ( const char *uri, FILE *f, DownloadOptions *options )
  80 {
  81   CURL *curl;
  82   CURLcode res = CURLE_FAILED_INIT;
  83   const gchar *cookie_file;
  84
  85   curl = curl_easy_init ();
  86   if ( curl )
  87     {
  88       curl_easy_setopt ( curl, CURLOPT_URL, uri );
  89       curl_easy_setopt ( curl, CURLOPT_FILE, f );
  90       if (options != NULL && options->referer != NULL)
  91         curl_easy_setopt ( curl, CURLOPT_REFERER, options->referer);
  92       curl_easy_setopt ( curl, CURLOPT_USERAGENT, "viking/" VERSION " libcurl/7.15.4" );
  93       if ((cookie_file = get_cookie_file(FALSE)) != NULL)
  94         curl_easy_setopt(curl, CURLOPT_COOKIEFILE, cookie_file);
  95       res = curl_easy_perform ( curl );
  96       curl_easy_cleanup ( curl );
  97     }
  98   return(res);
  99 }
 100
 101 int curl_download_get_url ( const char *hostname, const char *uri, FILE *f, DownloadOptions *options )
 102 {
 103   int ret;
 104   gchar *full = NULL;
 105
 106   /* Compose the full url */
 107   full = g_strdup_printf ( "http://%s%s", hostname, uri );
 108   ret = curl_download_uri ( full, f, options );
 109   g_free ( full );
 110   full = NULL;
 111
 112   return (ret ? -2 : 0);   /* -2 HTTP error */
 113 }