#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
#include <glib.h>
#include <glib/gstdio.h>
#include <glib/gi18n.h>
curl_download_user_agent = g_strdup_printf ("%s/%s %s", PACKAGE, VERSION, curl_version());
}
-int curl_download_uri ( const char *uri, FILE *f, DownloadOptions *options )
+int curl_download_uri ( const char *uri, FILE *f, DownloadOptions *options, time_t time_condition, void *handle )
{
CURL *curl;
CURLcode res = CURLE_FAILED_INIT;
g_debug("%s: uri=%s", __PRETTY_FUNCTION__, uri);
- curl = curl_easy_init ();
- if ( curl )
- {
- if (vik_verbose)
- curl_easy_setopt ( curl, CURLOPT_VERBOSE, 1 );
- curl_easy_setopt ( curl, CURLOPT_URL, uri );
- curl_easy_setopt ( curl, CURLOPT_WRITEDATA, f );
- curl_easy_setopt ( curl, CURLOPT_WRITEFUNCTION, curl_write_func);
- curl_easy_setopt ( curl, CURLOPT_NOPROGRESS, 0 );
- curl_easy_setopt ( curl, CURLOPT_PROGRESSDATA, NULL );
- curl_easy_setopt ( curl, CURLOPT_PROGRESSFUNCTION, curl_progress_func);
- if (options != NULL) {
- if(options->referer != NULL)
- curl_easy_setopt ( curl, CURLOPT_REFERER, options->referer);
- if(options->follow_location != 0) {
- curl_easy_setopt ( curl, CURLOPT_FOLLOWLOCATION, 1);
- curl_easy_setopt ( curl, CURLOPT_MAXREDIRS, options->follow_location);
- }
- }
- curl_easy_setopt ( curl, CURLOPT_USERAGENT, curl_download_user_agent );
- if ((cookie_file = get_cookie_file(FALSE)) != NULL)
- curl_easy_setopt(curl, CURLOPT_COOKIEFILE, cookie_file);
- res = curl_easy_perform ( curl );
- curl_easy_cleanup ( curl );
+ curl = handle ? handle : curl_easy_init ();
+ if ( !curl ) {
+ return DOWNLOAD_ERROR;
+ }
+ if (vik_verbose)
+ curl_easy_setopt ( curl, CURLOPT_VERBOSE, 1 );
+ curl_easy_setopt ( curl, CURLOPT_URL, uri );
+ curl_easy_setopt ( curl, CURLOPT_WRITEDATA, f );
+ curl_easy_setopt ( curl, CURLOPT_WRITEFUNCTION, curl_write_func);
+ curl_easy_setopt ( curl, CURLOPT_NOPROGRESS, 0 );
+ curl_easy_setopt ( curl, CURLOPT_PROGRESSDATA, NULL );
+ curl_easy_setopt ( curl, CURLOPT_PROGRESSFUNCTION, curl_progress_func);
+ if (options != NULL) {
+ if(options->referer != NULL)
+ curl_easy_setopt ( curl, CURLOPT_REFERER, options->referer);
+ if(options->follow_location != 0) {
+ curl_easy_setopt ( curl, CURLOPT_FOLLOWLOCATION, 1);
+ curl_easy_setopt ( curl, CURLOPT_MAXREDIRS, options->follow_location);
+ }
+ if(options->check_file_server_time && time_condition != 0) {
+ /* if file exists, check against server if file is recent enough */
+ curl_easy_setopt ( curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
+ curl_easy_setopt ( curl, CURLOPT_TIMEVALUE, time_condition);
}
- return(res);
+ }
+ curl_easy_setopt ( curl, CURLOPT_USERAGENT, curl_download_user_agent );
+ if ((cookie_file = get_cookie_file(FALSE)) != NULL)
+ curl_easy_setopt(curl, CURLOPT_COOKIEFILE, cookie_file);
+ res = curl_easy_perform ( curl );
+ if (res == 0) {
+ glong response;
+ curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);
+ if (response == 304) { // 304 = Not Modified
+ res = DOWNLOAD_NO_NEWER_FILE;
+ } else if (response == 200 || // http: 200 = Ok
+ response == 226) { // ftp: 226 = sucess
+ gdouble size;
+ /* verify if curl sends us any data - this is a workaround on using CURLOPT_TIMECONDITION
+ when the server has a (incorrect) time earlier than the time on the file we already have */
+ curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &size);
+ if (size == 0)
+ res = DOWNLOAD_ERROR;
+ else
+ res = DOWNLOAD_NO_ERROR;
+ } else {
+ g_warning("%s: http response: %ld for uri %s (time_condition = %ld)\n", __FUNCTION__, response, uri, time_condition);
+ res = DOWNLOAD_ERROR;
+ }
+ } else {
+ res = DOWNLOAD_ERROR;
+ }
+ if (!handle)
+ curl_easy_cleanup ( curl );
+ return res;
}
-int curl_download_get_url ( const char *hostname, const char *uri, FILE *f, DownloadOptions *options, gboolean ftp )
+int curl_download_get_url ( const char *hostname, const char *uri, FILE *f, DownloadOptions *options, gboolean ftp, time_t time_condition, void *handle )
{
int ret;
gchar *full = NULL;
/* Compose the full url */
full = g_strdup_printf ( "%s://%s%s", (ftp?"ftp":"http"), hostname, uri );
- ret = curl_download_uri ( full, f, options );
+ ret = curl_download_uri ( full, f, options, time_condition, handle );
g_free ( full );
full = NULL;
- return (ret ? -2 : 0); /* -2 HTTP error */
+ return ret;
+}
+
+void * curl_download_handle_init ()
+{
+ return curl_easy_init();
+}
+
+void curl_download_handle_cleanup ( void *handle )
+{
+ curl_easy_cleanup(handle);
}