src/ttrss_ws.c

   1 /*
   2  * Copyright (C) 2010-2013 jeanfi@gmail.com
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * 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 <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include <pthread.h>
  25
  26 #include <json/json.h>
  27
  28 #include "http.h"
  29 #include "log.h"
  30 #include "ttrss_ws.h"
  31 #include "url.h"
  32
  33 static char *session_id;
  34 static char *session_url;
  35 static char *session_user;
  36 static char *session_pwd;
  37
  38 static pthread_mutex_t lock;
  39 static struct http_session *session;
  40
  41 void ws_request_add_att_str(json_object *rq, const char *k, const char *str)
  42 {
  43         json_object_object_add(rq, k, json_object_new_string(str));
  44 }
  45
  46 void ws_request_add_att_int(json_object *rq, const char *k, int v)
  47 {
  48         json_object_object_add(rq, k, json_object_new_int(v));
  49 }
  50
  51 void ws_request_add_att_bool(json_object *rq, const char *k, int v)
  52 {
  53         json_object_object_add(rq, k, json_object_new_boolean(v));
  54 }
  55
  56 struct json_object *ws_request_new(const char *op)
  57 {
  58         struct json_object *rq;
  59
  60         rq = json_object_new_object();
  61
  62         ws_request_add_att_str(rq, "op", op);
  63
  64         if (session_id)
  65                 ws_request_add_att_str(rq, "sid", session_id);
  66
  67         return rq;
  68 }
  69
  70 void ws_set_config(const char *url, const char *user, const char *pwd)
  71 {
  72         char *tmp;
  73
  74         if (session_url && !strcmp(session_url, url)
  75             && session_user && !strcmp(session_user, user)
  76             && session_pwd && !strcmp(session_pwd, pwd))
  77                 return ;
  78
  79         free(session_id);
  80         session_id = NULL;
  81
  82         free(session_user);
  83         session_user = strdup(user);
  84
  85         free(session_pwd);
  86         session_pwd = strdup(pwd);
  87
  88         tmp = url_normalize(url);
  89         free(session_url);
  90         session_url = malloc(strlen(tmp) + strlen("/api/") + 1);
  91         strcpy(session_url, tmp);
  92         strcat(session_url, "/api/");
  93         free(tmp);
  94 }
  95
  96 struct json_object *ws_reply_get_content(struct json_object *rp)
  97 {
  98         log_debug("ws_reply_get_content");
  99         return json_object_object_get(rp, "content");
 100 }
 101
 102 static const char *ws_reply_get_error(struct json_object *content)
 103 {
 104         struct json_object *jerror;
 105
 106         log_debug("ws_reply_get_error");
 107
 108         if (json_object_get_type(content) != json_type_object)
 109                 return NULL;
 110
 111         jerror = json_object_object_get(content, "error");
 112
 113         if (!jerror)
 114                 return NULL;
 115
 116         return json_object_get_string(jerror);
 117 }
 118
 119 static struct json_object *
 120 execute(struct http_session *sess, struct json_object *rq, char **err)
 121 {
 122         struct json_object *rp, *content;
 123         const char *str;
 124
 125         rp = http_json_get(sess, session_url, rq);
 126
 127         content = NULL;
 128
 129         if (rp) {
 130                 content = ws_reply_get_content(rp);
 131
 132                 if (content) {
 133                         str = ws_reply_get_error(content);
 134
 135                         if (str) {
 136                                 log_debug("execute() err=%s", str);
 137                                 *err = strdup(str);
 138                                 content = NULL;
 139                         } else {
 140                                 json_object_get(content);
 141                         }
 142                 }
 143
 144                 json_object_put(rp);
 145         }
 146
 147         log_debug("execute() done");
 148
 149         return content;
 150 }
 151
 152 struct json_object *ws_execute(struct json_object *rq)
 153 {
 154         char *err;
 155         struct json_object *result;
 156
 157         log_debug("ws_execute()");
 158         pthread_mutex_lock(&lock);
 159         log_debug("ws_execute() lock");
 160
 161         err = NULL;
 162         result = execute(session, rq, &err);
 163
 164         if (err) {
 165                 log_debug("ws_execute(): error=%s", err);
 166
 167                 if (!strcmp(err, "NOT_LOGGED_IN")) {
 168                         ws_open_session();
 169                         result = execute(session, rq, NULL);
 170                 }
 171
 172                 free(err);
 173         }
 174
 175         log_debug("ws_execute() unlock");
 176         pthread_mutex_unlock(&lock);
 177
 178         log_debug("ws_execute()");
 179
 180         return result;
 181 }
 182
 183 int ws_get_api_version()
 184 {
 185         struct json_object *rp, *rq;
 186         int v;
 187
 188         rq = ws_request_new("getApiLevel");
 189
 190         rp = ws_execute(rq);
 191
 192         json_object_put(rq);
 193
 194         if (rp) {
 195                 v = json_object_get_int(json_object_object_get(rp, "level"));
 196
 197                 json_object_put(rp);
 198         } else {
 199                 v = 0;
 200         }
 201
 202         return v;
 203 }
 204
 205 char *ws_login()
 206 {
 207         struct json_object *rq, *rp, *j;
 208         char *str;
 209
 210         rq = ws_request_new("login");
 211         ws_request_add_att_str(rq, "user", session_user);
 212         ws_request_add_att_str(rq, "password", session_pwd);
 213
 214         rp = ws_execute(rq);
 215         json_object_put(rq);
 216
 217         str = NULL;
 218         if (rp) {
 219                 j = json_object_object_get(rp, "session_id");
 220
 221                 if (j)
 222                         str = strdup(json_object_get_string(j));
 223
 224                 json_object_put(rp);
 225         }
 226
 227         return str;
 228 }
 229
 230 int ws_open_session()
 231 {
 232         int version, result;
 233
 234         log_debug("ws_open_session()");
 235
 236         if (session_id)
 237                 free(session_id);
 238
 239         session_id = NULL;
 240         session_id = ws_login();
 241
 242         if (session_id) {
 243                 version = ws_get_api_version();
 244                 log_debug("API version= %d", version);
 245
 246                 if (version > 0) {
 247                         result = 1;
 248                 } else {
 249                         free(session_id);
 250                         session_id = NULL;
 251                         result = 0;
 252                 }
 253         } else {
 254                 result =  0;
 255         }
 256
 257         return result;
 258 }
 259
 260 char *ws_get_article_content(int id)
 261 {
 262         struct json_object *rp, *rq, *content, *item;
 263         char *str;
 264
 265         rq = ws_request_new("getArticle");
 266         ws_request_add_att_int(rq, "article_id", id);
 267
 268         rp = ws_execute(rq);
 269
 270         json_object_put(rq);
 271
 272         str = NULL;
 273
 274         if (rp) {
 275                 item = json_object_array_get_idx(rp, 0);
 276
 277                 if (item) {
 278                         content = json_object_object_get(item, "content");
 279                         str = strdup(json_object_get_string(content));
 280                 }
 281
 282                 json_object_put(rp);
 283         }
 284
 285         return str;
 286 }
 287
 288 int ws_update_headlines(struct feed *feed)
 289 {
 290         struct json_object *rp, *rq, *jheadline, *j;
 291         int i, n, hid;
 292         struct headline *h, **tmp;
 293         const char *title, *url;
 294
 295         rq = ws_request_new("getHeadlines");
 296         ws_request_add_att_int(rq, "feed_id", feed->id);
 297         ws_request_add_att_bool(rq, "show_excerpt", 1);
 298
 299         rp = ws_execute(rq);
 300
 301         json_object_put(rq);
 302
 303         if (rp) {
 304                 n = json_object_array_length(rp);
 305                 for (i = 0; i < n; i++) {
 306                         jheadline = json_object_array_get_idx(rp, i);
 307
 308                         j = json_object_object_get(jheadline, "id");
 309                         hid = json_object_get_int(j);
 310                         h = feed_get_headline(feed, hid);
 311
 312                         if (!h) {
 313                                 j = json_object_object_get(jheadline, "title");
 314                                 title = json_object_get_string(j);
 315
 316                                 j = json_object_object_get(jheadline, "link");
 317                                 url = json_object_get_string(j);
 318
 319                                 h = headline_new(hid, url, title);
 320
 321                                 j = json_object_object_get(jheadline,
 322                                                            "excerpt");
 323                                 h->excerpt = strdup(json_object_get_string(j));
 324
 325                                 j = json_object_object_get(jheadline,
 326                                                            "updated");
 327                                 h->date = json_object_get_int(j);
 328
 329                                 tmp = headlines_add(feed->headlines, h);
 330                                 if (feed->headlines)
 331                                         free(feed->headlines);
 332                                 feed->headlines = tmp;
 333                         }
 334
 335                         j = json_object_object_get(jheadline, "unread");
 336                         h->unread = json_object_get_boolean(j);
 337                 }
 338
 339                 if (!feed->headlines) {
 340                         feed->headlines = malloc(sizeof(struct headline *));
 341                         *(feed->headlines) = NULL;
 342                 }
 343
 344                 json_object_put(rp);
 345                 return 1;
 346         } else {
 347                 return 0;
 348         }
 349 }
 350
 351 static struct feed **
 352 feeds_update(struct feed **feeds, struct json_object *jarray)
 353 {
 354         int i, n, id;
 355         struct json_object *jfeed, *j;
 356         const char *url, *title;
 357         struct feed *feed, **tmp;
 358
 359         if (jarray) {
 360                 n = json_object_array_length(jarray);
 361
 362                 for (i = 0; i < n; i++) {
 363                         jfeed = json_object_array_get_idx(jarray, i);
 364
 365                         j = json_object_object_get(jfeed, "id");
 366                         id = json_object_get_int(j);
 367
 368                         feed = feeds_get_feed(feeds, id);
 369
 370                         if (!feed) {
 371                                 j = json_object_object_get(jfeed, "title");
 372                                 title = json_object_get_string(j);
 373
 374                                 j = json_object_object_get(jfeed, "feed_url");
 375                                 url = json_object_get_string(j);
 376
 377                                 feed = feed_new(id, url, title);
 378
 379                                 tmp = feeds_add(feeds, feed);
 380                                 free(feeds);
 381                                 feeds = tmp;
 382                         }
 383
 384                         j = json_object_object_get(jfeed, "unread");
 385                         feed->unread = json_object_get_int(j);
 386
 387                         ws_update_headlines(feed);
 388                 }
 389         }
 390
 391         return feeds;
 392 }
 393
 394 struct feed **ws_update_feeds(struct feed **feeds)
 395 {
 396         struct json_object *rp, *rq;
 397
 398         log_debug("ws_update_feeds()");
 399
 400         rq = ws_request_new("getFeeds");
 401         ws_request_add_att_int(rq, "cat_id", 0);
 402
 403         rp = ws_execute(rq);
 404
 405         if (rp) {
 406                 feeds = feeds_update(feeds, rp);
 407                 json_object_put(rp);
 408         }
 409
 410         ws_request_add_att_int(rq, "cat_id", -3);
 411         rp = ws_execute(rq);
 412         json_object_put(rq);
 413
 414         if (rp) {
 415                 feeds = feeds_update(feeds, rp);
 416                 json_object_put(rp);
 417         }
 418
 419         log_debug("ws_update_feeds() done");
 420
 421         return feeds;
 422 }
 423
 424 struct json_object *ws_request_new_set_article_unread(int id, int unread)
 425 {
 426         struct json_object *rq;
 427
 428         rq = ws_request_new("updateArticle");
 429         json_object_object_add(rq, "article_ids", json_object_new_int(id));
 430         json_object_object_add(rq, "field", json_object_new_int(2));
 431         json_object_object_add(rq, "mode", json_object_new_int(unread));
 432
 433         return rq;
 434 }
 435
 436 void ws_set_article_unread(int id, int unread)
 437 {
 438         struct json_object *rp, *rq;
 439
 440         log_debug("ws_set_article_unread(%d,%d)", id, unread);
 441
 442         rq = ws_request_new_set_article_unread(id, unread);
 443
 444         rp = ws_execute(rq);
 445
 446         json_object_put(rq);
 447
 448         if (rp)
 449                 json_object_put(rp);
 450
 451         log_debug("ws_set_article_unread(%d,%d) done", id, unread);
 452 }
 453
 454 void ws_init()
 455 {
 456         pthread_mutexattr_t attr;
 457         pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
 458         pthread_mutex_init(&lock, &attr);
 459
 460         session = http_session_new();
 461 }