2 * Conky, a system monitor, based on torsmo
4 * Please see COPYING for details
6 * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * vim: ts=4 sw=4 noet ai cindent syntax=c
28 #include "ccurl_thread.h"
34 #include <curl/curl.h>
35 #include <curl/types.h>
36 #include <curl/easy.h>
39 * The following code is the conky curl thread lib, which can be re-used to
40 * create any curl-based object (see weather and rss). Below is an
41 * implementation of a curl-only object ($curl) which can also be used as an
44 typedef struct _ccurl_memory_t {
49 /* finds a location based on uri in the list provided */
50 ccurl_location_t *ccurl_find_location(ccurl_location_t **locations_head, char *uri)
52 ccurl_location_t *tail = *locations_head;
53 ccurl_location_t *new = 0;
56 strcmp(tail->uri, uri) == EQUAL) {
61 if (!tail) { /* new location!!!!!!! */
62 DBGP("new curl location: '%s'", uri);
63 new = malloc(sizeof(ccurl_location_t));
64 memset(new, 0, sizeof(ccurl_location_t));
65 new->uri = strndup(uri, text_buffer_size);
66 tail = *locations_head;
67 while (tail && tail->next) {
71 /* omg the first one!!!!!!! */
72 *locations_head = new;
80 /* iterates over the list provided, frees stuff (list item, uri, result) */
81 void ccurl_free_locations(ccurl_location_t **locations_head)
83 ccurl_location_t *tail = *locations_head;
84 ccurl_location_t *last = 0;
87 if (tail->uri) free(tail->uri);
88 if (tail->result) free(tail->result);
96 /* callback used by curl for writing the received data */
97 size_t ccurl_write_memory_callback(void *ptr, size_t size, size_t nmemb, void *data)
99 size_t realsize = size * nmemb;
100 ccurl_memory_t *mem = (ccurl_memory_t*)data;
102 mem->memory = (char *) realloc(mem->memory, mem->size + realsize + 1);
104 memcpy(&(mem->memory[mem->size]), ptr, realsize);
105 mem->size += realsize;
106 mem->memory[mem->size] = 0;
112 /* fetch our datums */
113 void ccurl_fetch_data(ccurl_location_t *curloc)
119 ccurl_memory_t chunk;
124 curl = curl_easy_init();
126 DBGP("reading curl data from '%s'", curloc->uri);
127 curl_easy_setopt(curl, CURLOPT_URL, curloc->uri);
128 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1);
129 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ccurl_write_memory_callback);
130 curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *) &chunk);
131 curl_easy_setopt(curl, CURLOPT_USERAGENT, "conky-curl/1.0");
133 res = curl_easy_perform(curl);
134 if (res == CURLE_OK && chunk.size) {
135 timed_thread_lock(curloc->p_timed_thread);
136 (*curloc->process_function)(curloc->result, chunk.memory);
137 timed_thread_unlock(curloc->p_timed_thread);
140 ERR("curl: no data from server");
143 curl_easy_cleanup(curl);
147 void *ccurl_thread(void *) __attribute__((noreturn));
149 void ccurl_init_thread(ccurl_location_t *curloc, int interval)
152 assert(curloc->result);
154 curloc->p_timed_thread =
155 timed_thread_create(&ccurl_thread,
156 (void *)curloc, interval * 1000000);
158 if (!curloc->p_timed_thread) {
159 ERR("curl thread: error creating timed thread");
161 timed_thread_register(curloc->p_timed_thread,
162 &curloc->p_timed_thread);
163 if (timed_thread_run(curloc->p_timed_thread)) {
164 ERR("curl thread: error running timed thread");
168 void *ccurl_thread(void *arg)
170 ccurl_location_t *curloc = (ccurl_location_t*)arg;
173 ccurl_fetch_data(curloc);
174 if (timed_thread_test(curloc->p_timed_thread, 0)) {
175 timed_thread_exit(curloc->p_timed_thread);
183 * This is where the $curl section begins.
186 /* internal location pointer for use by $curl, no touchy */
187 static ccurl_location_t *ccurl_locations_head = 0;
189 /* used to free data used by $curl */
190 void ccurl_free_info(void)
192 ccurl_free_locations(&ccurl_locations_head);
195 /* straight copy, used by $curl */
196 void ccurl_parse_data(void *result, const char *data)
198 strncpy(result, data, max_user_text);
201 /* prints result data to text buffer, used by $curl */
202 void ccurl_process_info(char *p, int p_max_size, char *uri, int interval)
204 ccurl_location_t *curloc = ccurl_find_location(&ccurl_locations_head, uri);
205 if (!curloc->p_timed_thread) {
206 curloc->result = malloc(max_user_text);
207 memset(curloc->result, 0, max_user_text);
208 curloc->process_function = &ccurl_parse_data;
209 ccurl_init_thread(curloc, interval);
210 if (!curloc->p_timed_thread) {
211 ERR("error setting up curl thread");
215 timed_thread_lock(curloc->p_timed_thread);
216 strncpy(p, curloc->result, p_max_size);
217 timed_thread_unlock(curloc->p_timed_thread);