vcs.maemo.org Git - monky/blob - src/ccurl_thread.c

   1 /*
   2  * Conky, a system monitor, based on torsmo
   3  *
   4  * Please see COPYING for details
   5  *
   6  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
   7  *      (see AUTHORS)
   8  * All rights reserved.
   9  *
  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.
  14  *
  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/>.
  21  *
  22  */
  23
  24 #include "conky.h"
  25 #include "logging.h"
  26 #include "ccurl_thread.h"
  27
  28 #ifdef DEBUG
  29 #include <assert.h>
  30 #endif /* DEBUG */
  31
  32 #include <curl/curl.h>
  33 #include <curl/types.h>
  34 #include <curl/easy.h>
  35
  36 typedef struct _ccurl_memory_t {
  37         char *memory;
  38         size_t size;
  39 } ccurl_memory_t;
  40
  41 ccurl_location_t *ccurl_find_location(ccurl_location_t **locations_head, char *uri)
  42 {
  43         ccurl_location_t *tail = *locations_head;
  44         ccurl_location_t *new = 0;
  45         while (tail) {
  46                 if (tail->uri &&
  47                                 strcmp(tail->uri, uri) == EQUAL) {
  48                         return tail;
  49                 }
  50                 tail = tail->next;
  51         }
  52         if (!tail) { /* new location!!!!!!! */
  53                 new = malloc(sizeof(ccurl_location_t));
  54                 memset(new, 0, sizeof(ccurl_location_t));
  55                 new->uri = strndup(uri, text_buffer_size);
  56                 tail = *locations_head;
  57                 while (tail && tail->next) {
  58                         tail = tail->next;
  59                 }
  60                 if (!tail) {
  61                         /* omg the first one!!!!!!! */
  62                         *locations_head = new;
  63                 } else {
  64                         tail->next = new;
  65                 }
  66         }
  67         return new;
  68 }
  69
  70 void ccurl_free_locations(ccurl_location_t **locations_head)
  71 {
  72         ccurl_location_t *tail = *locations_head;
  73         ccurl_location_t *last = 0;
  74
  75         while (tail) {
  76                 if (tail->uri) free(tail->uri);
  77                 if (tail->result) free(tail->result);
  78                 last = tail;
  79                 tail = tail->next;
  80                 free(last);
  81         }
  82         *locations_head = 0;
  83 }
  84
  85 size_t ccurl_write_memory_callback(void *ptr, size_t size, size_t nmemb, void *data)
  86 {
  87         size_t realsize = size * nmemb;
  88         ccurl_memory_t *mem = (ccurl_memory_t*)data;
  89
  90         mem->memory = (char *) realloc(mem->memory, mem->size + realsize + 1);
  91         if (mem->memory) {
  92                 memcpy(&(mem->memory[mem->size]), ptr, realsize);
  93                 mem->size += realsize;
  94                 mem->memory[mem->size] = 0;
  95         }
  96         return realsize;
  97 }
  98
  99
 100
 101 void ccurl_fetch_data(ccurl_location_t *curloc)
 102 {
 103         CURL *curl = NULL;
 104         CURLcode res;
 105
 106         // curl temps
 107         ccurl_memory_t chunk;
 108
 109         chunk.memory = NULL;
 110         chunk.size = 0;
 111
 112         curl = curl_easy_init();
 113         if (curl) {
 114                 curl_easy_setopt(curl, CURLOPT_URL, curloc->uri);
 115                 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1);
 116                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ccurl_write_memory_callback);
 117                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *) &chunk);
 118                 curl_easy_setopt(curl, CURLOPT_USERAGENT, "conky-curl/1.0");
 119
 120                 res = curl_easy_perform(curl);
 121                 if (res == CURLE_OK && chunk.size) {
 122                         timed_thread_lock(curloc->p_timed_thread);
 123                         (*curloc->process_function)(curloc->result, chunk.memory);
 124                         timed_thread_unlock(curloc->p_timed_thread);
 125                         free(chunk.memory);
 126                 } else {
 127                         ERR("weather: no data from server");
 128                 }
 129
 130                 curl_easy_cleanup(curl);
 131         }
 132
 133         return;
 134 }
 135
 136 void *ccurl_thread(void *) __attribute__((noreturn));
 137
 138 void ccurl_init_thread(ccurl_location_t *curloc, int interval)
 139 {
 140 #ifdef DEBUG
 141         assert(curloc->result);
 142 #endif /* DEBUG */
 143         curloc->p_timed_thread =
 144                 timed_thread_create(&ccurl_thread,
 145                                 (void *)curloc, interval * 1000000);
 146
 147         if (!curloc->p_timed_thread) {
 148                 ERR("curl thread: error creating timed thread");
 149         }
 150         timed_thread_register(curloc->p_timed_thread,
 151                         &curloc->p_timed_thread);
 152         if (timed_thread_run(curloc->p_timed_thread)) {
 153                 ERR("curl thread: error running timed thread");
 154         }
 155 }
 156
 157 void *ccurl_thread(void *arg)
 158 {
 159         ccurl_location_t *curloc = (ccurl_location_t*)arg;
 160
 161         while (1) {
 162                 ccurl_fetch_data(curloc);
 163                 if (timed_thread_test(curloc->p_timed_thread, 0)) {
 164                         timed_thread_exit(curloc->p_timed_thread);
 165                 }
 166         }
 167         /* never reached */
 168 }
 169
 170 static ccurl_location_t *ccurl_locations_head = 0;
 171
 172 void ccurl_free_info(void)
 173 {
 174         ccurl_free_locations(&ccurl_locations_head);
 175 }
 176
 177 void ccurl_parse_data(void *result, const char *data)
 178 {
 179         strncpy(result, data, max_user_text);
 180 }
 181
 182 void ccurl_process_info(char *p, int p_max_size, char *uri, int interval)
 183 {
 184         ccurl_location_t *curloc = ccurl_find_location(&ccurl_locations_head, uri);
 185         if (!curloc->p_timed_thread) {
 186                 curloc->result = malloc(max_user_text);
 187                 memset(curloc->result, 0, max_user_text);
 188                 curloc->process_function = &ccurl_parse_data;
 189                 ccurl_init_thread(curloc, interval);
 190                 if (!curloc->p_timed_thread) {
 191                         ERR("error setting up weather thread");
 192                 }
 193         }
 194
 195         timed_thread_lock(curloc->p_timed_thread);
 196         strncpy(p, curloc->result, p_max_size);
 197         timed_thread_unlock(curloc->p_timed_thread);
 198 }
 199