git.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                 DBGP("new curl location: '%s'", uri);
  54                 new = malloc(sizeof(ccurl_location_t));
  55                 memset(new, 0, sizeof(ccurl_location_t));
  56                 new->uri = strndup(uri, text_buffer_size);
  57                 tail = *locations_head;
  58                 while (tail && tail->next) {
  59                         tail = tail->next;
  60                 }
  61                 if (!tail) {
  62                         /* omg the first one!!!!!!! */
  63                         *locations_head = new;
  64                 } else {
  65                         tail->next = new;
  66                 }
  67         }
  68         return new;
  69 }
  70
  71 void ccurl_free_locations(ccurl_location_t **locations_head)
  72 {
  73         ccurl_location_t *tail = *locations_head;
  74         ccurl_location_t *last = 0;
  75
  76         while (tail) {
  77                 if (tail->uri) free(tail->uri);
  78                 if (tail->result) free(tail->result);
  79                 last = tail;
  80                 tail = tail->next;
  81                 free(last);
  82         }
  83         *locations_head = 0;
  84 }
  85
  86 size_t ccurl_write_memory_callback(void *ptr, size_t size, size_t nmemb, void *data)
  87 {
  88         size_t realsize = size * nmemb;
  89         ccurl_memory_t *mem = (ccurl_memory_t*)data;
  90
  91         mem->memory = (char *) realloc(mem->memory, mem->size + realsize + 1);
  92         if (mem->memory) {
  93                 memcpy(&(mem->memory[mem->size]), ptr, realsize);
  94                 mem->size += realsize;
  95                 mem->memory[mem->size] = 0;
  96         }
  97         return realsize;
  98 }
  99
 100
 101
 102 void ccurl_fetch_data(ccurl_location_t *curloc)
 103 {
 104         CURL *curl = NULL;
 105         CURLcode res;
 106
 107         // curl temps
 108         ccurl_memory_t chunk;
 109
 110         chunk.memory = NULL;
 111         chunk.size = 0;
 112
 113         curl = curl_easy_init();
 114         if (curl) {
 115                 DBGP("reading curl data from '%s'", curloc->uri);
 116                 curl_easy_setopt(curl, CURLOPT_URL, curloc->uri);
 117                 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1);
 118                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ccurl_write_memory_callback);
 119                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *) &chunk);
 120                 curl_easy_setopt(curl, CURLOPT_USERAGENT, "conky-curl/1.0");
 121
 122                 res = curl_easy_perform(curl);
 123                 if (res == CURLE_OK && chunk.size) {
 124                         timed_thread_lock(curloc->p_timed_thread);
 125                         (*curloc->process_function)(curloc->result, chunk.memory);
 126                         timed_thread_unlock(curloc->p_timed_thread);
 127                         free(chunk.memory);
 128                 } else {
 129                         ERR("weather: no data from server");
 130                 }
 131
 132                 curl_easy_cleanup(curl);
 133         }
 134
 135         return;
 136 }
 137
 138 void *ccurl_thread(void *) __attribute__((noreturn));
 139
 140 void ccurl_init_thread(ccurl_location_t *curloc, int interval)
 141 {
 142 #ifdef DEBUG
 143         assert(curloc->result);
 144 #endif /* DEBUG */
 145         curloc->p_timed_thread =
 146                 timed_thread_create(&ccurl_thread,
 147                                 (void *)curloc, interval * 1000000);
 148
 149         if (!curloc->p_timed_thread) {
 150                 ERR("curl thread: error creating timed thread");
 151         }
 152         timed_thread_register(curloc->p_timed_thread,
 153                         &curloc->p_timed_thread);
 154         if (timed_thread_run(curloc->p_timed_thread)) {
 155                 ERR("curl thread: error running timed thread");
 156         }
 157 }
 158
 159 void *ccurl_thread(void *arg)
 160 {
 161         ccurl_location_t *curloc = (ccurl_location_t*)arg;
 162
 163         while (1) {
 164                 ccurl_fetch_data(curloc);
 165                 if (timed_thread_test(curloc->p_timed_thread, 0)) {
 166                         timed_thread_exit(curloc->p_timed_thread);
 167                 }
 168         }
 169         /* never reached */
 170 }
 171
 172 static ccurl_location_t *ccurl_locations_head = 0;
 173
 174 void ccurl_free_info(void)
 175 {
 176         ccurl_free_locations(&ccurl_locations_head);
 177 }
 178
 179 void ccurl_parse_data(void *result, const char *data)
 180 {
 181         strncpy(result, data, max_user_text);
 182 }
 183
 184 void ccurl_process_info(char *p, int p_max_size, char *uri, int interval)
 185 {
 186         ccurl_location_t *curloc = ccurl_find_location(&ccurl_locations_head, uri);
 187         if (!curloc->p_timed_thread) {
 188                 curloc->result = malloc(max_user_text);
 189                 memset(curloc->result, 0, max_user_text);
 190                 curloc->process_function = &ccurl_parse_data;
 191                 ccurl_init_thread(curloc, interval);
 192                 if (!curloc->p_timed_thread) {
 193                         ERR("error setting up weather thread");
 194                 }
 195         }
 196
 197         timed_thread_lock(curloc->p_timed_thread);
 198         strncpy(p, curloc->result, p_max_size);
 199         timed_thread_unlock(curloc->p_timed_thread);
 200 }
 201