git.maemo.org Git - monky/blob - src/rss.c

   1 /*
   2  * rss.c
   3  * RSS stuff (prss version)
   4  *
   5  * prss.c and prss.h written by Sisu (Mikko Sysikaski)
   6  * new rss.c written by hifi (Toni Spets)
   7  */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <time.h>
  12 #include <assert.h>
  13 #include "prss.h"
  14 #include <curl/curl.h>
  15 #include <curl/types.h>
  16 #include <curl/easy.h>
  17
  18 #define MAX_FEEDS 16
  19
  20 struct MemoryStruct {
  21         char *memory;
  22         size_t size;
  23 };
  24
  25 typedef struct feed_ {
  26         char* uri;
  27         int last_update;
  28         PRSS* data;
  29 } feed;
  30
  31 int num_feeds = 0;
  32 feed feeds[MAX_FEEDS];
  33
  34 size_t
  35 WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *data)
  36 {
  37         size_t realsize = size * nmemb;
  38         struct MemoryStruct *mem = (struct MemoryStruct *)data;
  39
  40         mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
  41         if (mem->memory) {
  42                 memcpy(&(mem->memory[mem->size]), ptr, realsize);
  43                 mem->size += realsize;
  44                 mem->memory[mem->size] = 0;
  45         }
  46         return realsize;
  47 }
  48
  49
  50 int rss_delay(int *wait, int delay)
  51 {
  52         time_t now = time(NULL);
  53
  54         // make it minutes
  55         if(delay < 1) delay = 1;
  56         delay *= 60;
  57
  58         if(!*wait) {
  59                 *wait = now + delay;
  60                 return 1;
  61         }
  62
  63         if(now >= *wait + delay) {
  64                 *wait = now + delay;
  65                 return 1;
  66         }
  67
  68         return 0;
  69 }
  70
  71 PRSS*
  72 get_rss_info(char *uri, int delay)
  73 {
  74         CURL *curl = NULL;
  75         CURLcode res;
  76         // curl temps
  77         struct MemoryStruct chunk;
  78         chunk.memory = NULL;
  79         chunk.size = 0;
  80
  81         // pointers to struct
  82         feed *curfeed = NULL;
  83         PRSS *curdata = NULL;
  84         int *last_update = 0;
  85
  86         int i;
  87
  88         // first seek for the uri in list
  89         if(num_feeds > 0) {
  90                 for(i = 0; i < num_feeds; i++) {
  91                         if(feeds[i].uri != NULL)
  92                                 if(!strcmp(feeds[i].uri, uri)) {
  93                                         curfeed = &feeds[i];
  94                                         break;
  95                                 }
  96                 }
  97         }
  98
  99         if(!curfeed) { // new feed
 100                 if(num_feeds == MAX_FEEDS-1) return NULL;
 101                 curfeed = &feeds[num_feeds];
 102                 curfeed->uri = (char *)malloc(sizeof(char) * strlen(uri)+1);
 103                 strncpy(curfeed->uri, uri, strlen(uri)+1);
 104                 num_feeds++;
 105         }
 106
 107         last_update = &curfeed->last_update;
 108         curdata = curfeed->data;
 109
 110         if(!rss_delay(last_update, delay))
 111                 return curdata; // wait for delay to pass
 112
 113         if(curdata != NULL)
 114                 prss_free(curdata); // clean up old data
 115
 116         curl = curl_easy_init();
 117         if(curl) {
 118                 curl_easy_setopt(curl, CURLOPT_URL, uri);
 119                 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1);
 120                 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
 121                 curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
 122                 curl_easy_setopt(curl, CURLOPT_USERAGENT, "conky-rss/1.0");
 123
 124                 res = curl_easy_perform(curl);
 125                 if(chunk.size) {
 126                         curdata = prss_parse_data(chunk.memory);
 127                         free(chunk.memory);
 128                 }
 129
 130                 curfeed->data = curdata;
 131
 132                 curl_easy_cleanup(curl);
 133         }
 134
 135         return curdata;
 136 }