src/lp_ws.c

   1 /*
   2     Copyright (C) 2011 jeanfi@gmail.com
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17     02110-1301 USA
  18 */
  19
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include <curl/curl.h>
  24 #include <json/json.h>
  25
  26 #include "cache.h"
  27 #include "lp_ws.h"
  28 #include "lp_json.h"
  29 #include "ppastats.h"
  30
  31 #define QUERY_GET_PUBLISHED_BINARIES \
  32         "?ws.op=getPublishedBinaries&status=Published"
  33 #define QUERY_GET_DOWNLOAD_COUNT "?ws.op=getDownloadCount"
  34 #define QUERY_GET_DAILY_DOWNLOAD_TOTALS \
  35         "?ws.op=getDailyDownloadTotals"
  36
  37 static CURL *curl;
  38
  39 struct ucontent {
  40         char *data;
  41         size_t len;
  42 };
  43
  44 static size_t cbk_curl(void *buffer, size_t size, size_t nmemb, void *userp)
  45 {
  46         size_t realsize = size * nmemb;
  47         struct ucontent *mem = (struct ucontent *)userp;
  48
  49         mem->data = realloc(mem->data, mem->len + realsize + 1);
  50
  51         memcpy(&(mem->data[mem->len]), buffer, realsize);
  52         mem->len += realsize;
  53         mem->data[mem->len] = 0;
  54
  55         return realsize;
  56 }
  57
  58 static char *fetch_url(const char *url)
  59 {
  60         struct ucontent *content = malloc(sizeof(struct ucontent));
  61         char *result = NULL;
  62         long code;
  63
  64         if (debug)
  65                 printf("DEBUG: fetch_url %s\n", url);
  66
  67         if (!curl) {
  68                 curl_global_init(CURL_GLOBAL_ALL);
  69                 curl = curl_easy_init();
  70         }
  71
  72         if (!curl)
  73                 exit(EXIT_FAILURE);
  74
  75         content->data = malloc(1);
  76         content->data[0] = '\0';
  77         content->len = 0;
  78
  79         curl_easy_setopt(curl, CURLOPT_URL, url);
  80         curl_easy_setopt(curl, CURLOPT_VERBOSE, 0);
  81         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, cbk_curl);
  82         curl_easy_setopt(curl, CURLOPT_WRITEDATA, content);
  83         curl_easy_setopt(curl, CURLOPT_USERAGENT, "ppastats/0.0");
  84
  85         if (curl_easy_perform(curl) == CURLE_OK) {
  86
  87                 curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
  88                 if (code == 200)
  89                         result = content->data;
  90         }
  91
  92         if (!result)
  93                 free(content->data);
  94
  95         free(content);
  96
  97         return result;
  98 }
  99
 100 static json_object *get_json_object(const char *url)
 101 {
 102         json_object *obj = NULL;
 103         char *body;
 104
 105         body = fetch_url(url);
 106
 107         if (body) {
 108                 obj = json_tokener_parse(body);
 109
 110                 free(body);
 111
 112                 return obj;
 113         }
 114
 115         return NULL;
 116 }
 117
 118 struct binary_package_publishing_history * *
 119 get_binary_package_publishing_history_list(const char *archive_url)
 120 {
 121         char *url = malloc(strlen(archive_url)+
 122                            strlen(QUERY_GET_PUBLISHED_BINARIES)+
 123                            1);
 124         json_object *o;
 125         struct binary_package_publishing_history **result;
 126
 127         strcpy(url, archive_url);
 128         strcat(url, QUERY_GET_PUBLISHED_BINARIES);
 129
 130         o = get_json_object(url);
 131         free(url);
 132
 133         if (!o)
 134                 return NULL;
 135
 136         result = json_object_to_binary_package_publishing_history_list(o);
 137
 138         json_object_put(o);
 139
 140         return result;
 141 }
 142
 143 int get_download_count(const char *archive_url)
 144 {
 145         int n = strlen(archive_url) + strlen(QUERY_GET_DOWNLOAD_COUNT) + 1;
 146         char *url = malloc(n);
 147         int result;
 148         json_object *obj;
 149
 150         strcpy(url, archive_url);
 151         strcat(url, QUERY_GET_DOWNLOAD_COUNT);
 152
 153         obj = get_json_object(url);
 154         free(url);
 155
 156         if (!obj)
 157                 return -1;
 158
 159         result = json_object_get_int(obj);
 160
 161         json_object_put(obj);
 162
 163         return result;
 164 }
 165
 166 const struct distro_arch_series *get_distro_arch_series(const char *url)
 167 {
 168         json_object *obj;
 169         const struct distro_arch_series *distro;
 170
 171         distro = cache_get(url);
 172         if (distro)
 173                 return (struct distro_arch_series *)distro;
 174
 175         obj = get_json_object(url);
 176
 177         if (!obj)
 178                 return NULL;
 179
 180         distro = json_object_to_distro_arch_series(obj);
 181
 182         json_object_put(obj);
 183
 184         cache_put(url, distro, (void (*)(void *))&distro_arch_series_free);
 185
 186         return distro;
 187 }
 188
 189 const struct distro_series *get_distro_series(const char *url)
 190 {
 191         json_object *obj;
 192         const struct distro_series *distro;
 193
 194         distro = cache_get(url);
 195         if (distro)
 196                 return (struct distro_series *)distro;
 197
 198         obj = get_json_object(url);
 199
 200         if (!obj)
 201                 return NULL;
 202
 203         distro = json_object_to_distro_series(obj);
 204
 205         json_object_put(obj);
 206
 207         cache_put(url, distro, (void (*)(void *))&distro_series_free);
 208
 209         return distro;
 210 }
 211
 212 struct daily_download_total **get_daily_download_totals(const char *binary_url)
 213 {
 214         char *url;
 215         json_object *obj;
 216         struct daily_download_total **result = NULL;
 217
 218         url = malloc(strlen(binary_url)+
 219                      strlen(QUERY_GET_DAILY_DOWNLOAD_TOTALS)+1);
 220
 221         strcpy(url, binary_url);
 222         strcat(url, QUERY_GET_DAILY_DOWNLOAD_TOTALS);
 223
 224         obj = get_json_object(url);
 225
 226         if (obj) {
 227                 result = json_object_to_daily_download_totals(obj);
 228                 json_object_put(obj);
 229         }
 230
 231         free(url);
 232
 233         return result;
 234 }
 235
 236 void lp_ws_cleanup()
 237 {
 238         if (debug)
 239                 printf("DEBUG: cleanup CURL\n");
 240
 241         curl_easy_cleanup(curl);
 242         curl_global_cleanup();
 243 }