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 "list.h"
  28 #include "lp_ws.h"
  29 #include "lp_json.h"
  30 #include "ppastats.h"
  31
  32 #define QUERY_GET_PUBLISHED_BINARIES \
  33         "?ws.op=getPublishedBinaries"
  34 #define QUERY_GET_DOWNLOAD_COUNT "?ws.op=getDownloadCount"
  35 #define QUERY_GET_DAILY_DOWNLOAD_TOTALS \
  36         "?ws.op=getDailyDownloadTotals"
  37
  38 static CURL *curl;
  39
  40 struct ucontent {
  41         char *data;
  42         size_t len;
  43 };
  44
  45 static size_t cbk_curl(void *buffer, size_t size, size_t nmemb, void *userp)
  46 {
  47         size_t realsize = size * nmemb;
  48         struct ucontent *mem = (struct ucontent *)userp;
  49
  50         mem->data = realloc(mem->data, mem->len + realsize + 1);
  51
  52         memcpy(&(mem->data[mem->len]), buffer, realsize);
  53         mem->len += realsize;
  54         mem->data[mem->len] = 0;
  55
  56         return realsize;
  57 }
  58
  59 static char *fetch_url(const char *url)
  60 {
  61         struct ucontent *content = malloc(sizeof(struct ucontent));
  62         char *result = NULL;
  63         long code;
  64
  65         if (debug)
  66                 printf("DEBUG: fetch_url %s\n", url);
  67
  68         if (!curl) {
  69                 curl_global_init(CURL_GLOBAL_ALL);
  70                 curl = curl_easy_init();
  71         }
  72
  73         if (!curl)
  74                 exit(EXIT_FAILURE);
  75
  76         content->data = malloc(1);
  77         content->data[0] = '\0';
  78         content->len = 0;
  79
  80         curl_easy_setopt(curl, CURLOPT_URL, url);
  81         curl_easy_setopt(curl, CURLOPT_VERBOSE, 0);
  82         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, cbk_curl);
  83         curl_easy_setopt(curl, CURLOPT_WRITEDATA, content);
  84         curl_easy_setopt(curl, CURLOPT_USERAGENT, "ppastats/0.0");
  85
  86         if (curl_easy_perform(curl) == CURLE_OK) {
  87
  88                 curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
  89                 if (code == 200)
  90                         result = content->data;
  91         }
  92
  93         if (!result)
  94                 free(content->data);
  95
  96         free(content);
  97
  98         return result;
  99 }
 100
 101 static json_object *get_json_object(const char *url)
 102 {
 103         json_object *obj = NULL;
 104         char *body;
 105
 106         body = fetch_url(url);
 107
 108         if (body) {
 109                 obj = json_tokener_parse(body);
 110
 111                 free(body);
 112
 113                 return obj;
 114         }
 115
 116         return NULL;
 117 }
 118
 119 #define json_object_to_bpph_list \
 120 json_object_to_binary_package_publishing_history_list
 121
 122 struct binary_package_publishing_history * *
 123 get_binary_package_publishing_history_list(const char *archive_url,
 124                                            const char *pkg_status)
 125 {
 126         struct json_object *o_next;
 127         char *url;
 128         json_object *o;
 129         void **result = NULL;
 130
 131         url = malloc(strlen(archive_url)+
 132                      strlen(QUERY_GET_PUBLISHED_BINARIES)+
 133                      (pkg_status ? strlen("&status=")+strlen(pkg_status) : 0)+
 134                      1);
 135
 136         strcpy(url, archive_url);
 137         strcat(url, QUERY_GET_PUBLISHED_BINARIES);
 138
 139         if (pkg_status) {
 140                 strcat(url, "&status=");
 141                 strcat(url, pkg_status);
 142         }
 143
 144         while (url) {
 145                 o = get_json_object(url);
 146                 free(url);
 147                 url = NULL;
 148
 149                 if (!o)
 150                         break;
 151
 152                 result = list_append_list(result,
 153                                           (void **)json_object_to_bpph_list(o));
 154
 155                 o_next = json_object_object_get(o, "next_collection_link");
 156
 157                 if (o_next)
 158                         url = strdup(json_object_get_string(o_next));
 159
 160                 json_object_put(o);
 161         }
 162
 163         return (struct binary_package_publishing_history **)result;
 164 }
 165
 166 int get_download_count(const char *archive_url)
 167 {
 168         int n = strlen(archive_url) + strlen(QUERY_GET_DOWNLOAD_COUNT) + 1;
 169         char *url = malloc(n);
 170         int result;
 171         json_object *obj;
 172
 173         strcpy(url, archive_url);
 174         strcat(url, QUERY_GET_DOWNLOAD_COUNT);
 175
 176         obj = get_json_object(url);
 177         free(url);
 178
 179         if (!obj)
 180                 return -1;
 181
 182         result = json_object_get_int(obj);
 183
 184         json_object_put(obj);
 185
 186         return result;
 187 }
 188
 189 const struct distro_arch_series *get_distro_arch_series(const char *url)
 190 {
 191         json_object *obj;
 192         const struct distro_arch_series *distro;
 193
 194         distro = cache_get(url);
 195         if (distro)
 196                 return (struct distro_arch_series *)distro;
 197
 198         obj = get_json_object(url);
 199
 200         if (!obj)
 201                 return NULL;
 202
 203         distro = json_object_to_distro_arch_series(obj);
 204
 205         json_object_put(obj);
 206
 207         cache_put(url, distro, (void (*)(void *))&distro_arch_series_free);
 208
 209         return distro;
 210 }
 211
 212 const struct distro_series *get_distro_series(const char *url)
 213 {
 214         json_object *obj;
 215         const struct distro_series *distro;
 216
 217         distro = cache_get(url);
 218         if (distro)
 219                 return (struct distro_series *)distro;
 220
 221         obj = get_json_object(url);
 222
 223         if (!obj)
 224                 return NULL;
 225
 226         distro = json_object_to_distro_series(obj);
 227
 228         json_object_put(obj);
 229
 230         cache_put(url, distro, (void (*)(void *))&distro_series_free);
 231
 232         return distro;
 233 }
 234
 235 struct daily_download_total **get_daily_download_totals(const char *binary_url)
 236 {
 237         char *url;
 238         json_object *obj;
 239         struct daily_download_total **result = NULL;
 240
 241         url = malloc(strlen(binary_url)+
 242                      strlen(QUERY_GET_DAILY_DOWNLOAD_TOTALS)+1);
 243
 244         strcpy(url, binary_url);
 245         strcat(url, QUERY_GET_DAILY_DOWNLOAD_TOTALS);
 246
 247         obj = get_json_object(url);
 248
 249         if (obj) {
 250                 result = json_object_to_daily_download_totals(obj);
 251                 json_object_put(obj);
 252         }
 253
 254         free(url);
 255
 256         return result;
 257 }
 258
 259 void lp_ws_cleanup()
 260 {
 261         if (debug)
 262                 printf("DEBUG: cleanup CURL\n");
 263
 264         curl_easy_cleanup(curl);
 265         curl_global_cleanup();
 266 }