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                                 *err = strdup(str);
 137                                 content = NULL;
 138                         } else {
 139                                 json_object_get(content);
 140                         }
 141                 }
 142
 143                 json_object_put(rp);
 144         }
 145
 146         return content;
 147 }
 148
 149 struct json_object *ws_execute(struct json_object *rq)
 150 {
 151         char *err;
 152         struct json_object *result;
 153
 154         log_debug("ws_execute()");
 155         pthread_mutex_lock(&lock);
 156         log_debug("ws_execute() lock");
 157
 158         err = NULL;
 159         result = execute(session, rq, &err);
 160
 161         if (err) {
 162                 log_debug("ws_execute(): error=%s", err);
 163
 164                 if (!strcmp(err, "NOT_LOGGED_IN")) {
 165                         ws_open_session();
 166                         result = execute(session, rq, NULL);
 167                 }
 168
 169                 free(err);
 170         }
 171
 172         log_debug("ws_execute() unlock");
 173         pthread_mutex_unlock(&lock);
 174
 175         log_debug("ws_execute()");
 176
 177         return result;
 178 }
 179
 180 int ws_get_api_version()
 181 {
 182         struct json_object *rp, *rq;
 183         int v;
 184
 185         rq = ws_request_new("getApiLevel");
 186
 187         rp = ws_execute(rq);
 188
 189         json_object_put(rq);
 190
 191         if (rp) {
 192                 v = json_object_get_int(json_object_object_get(rp, "level"));
 193
 194                 json_object_put(rp);
 195         } else {
 196                 v = 0;
 197         }
 198
 199         return v;
 200 }
 201
 202 char *ws_login()
 203 {
 204         struct json_object *rq, *rp, *j;
 205         char *str;
 206
 207         rq = ws_request_new("login");
 208         ws_request_add_att_str(rq, "user", session_user);
 209         ws_request_add_att_str(rq, "password", session_pwd);
 210
 211         rp = ws_execute(rq);
 212         json_object_put(rq);
 213
 214         str = NULL;
 215         if (rp) {
 216                 j = json_object_object_get(rp, "session_id");
 217
 218                 if (j)
 219                         str = strdup(json_object_get_string(j));
 220
 221                 json_object_put(rp);
 222         }
 223
 224         return str;
 225 }
 226
 227 int ws_open_session()
 228 {
 229         int version, result;
 230
 231         log_debug("ws_open_session()");
 232
 233         if (session_id)
 234                 free(session_id);
 235
 236         session_id = NULL;
 237         session_id = ws_login();
 238
 239         if (session_id) {
 240                 version = ws_get_api_version();
 241                 log_debug("API version= %d", version);
 242
 243                 if (version > 0) {
 244                         result = 1;
 245                 } else {
 246                         free(session_id);
 247                         session_id = NULL;
 248                         result = 0;
 249                 }
 250         } else {
 251                 result =  0;
 252         }
 253
 254         return result;
 255 }
 256
 257 char *ws_get_article_content(int id)
 258 {
 259         struct json_object *rp, *rq, *content, *item;
 260         char *str;
 261
 262         rq = ws_request_new("getArticle");
 263         ws_request_add_att_int(rq, "article_id", id);
 264
 265         rp = ws_execute(rq);
 266
 267         json_object_put(rq);
 268
 269         str = NULL;
 270
 271         if (rp) {
 272                 item = json_object_array_get_idx(rp, 0);
 273
 274                 if (item) {
 275                         content = json_object_object_get(item, "content");
 276                         str = strdup(json_object_get_string(content));
 277                 }
 278
 279                 json_object_put(rp);
 280         }
 281
 282         return str;
 283 }
 284
 285 int ws_update_headlines(struct feed *feed)
 286 {
 287         struct json_object *rp, *rq, *jheadline, *j;
 288         int i, n, hid;
 289         struct headline *h, **tmp;
 290         const char *title, *url;
 291
 292         rq = ws_request_new("getHeadlines");
 293         ws_request_add_att_int(rq, "feed_id", feed->id);
 294         ws_request_add_att_bool(rq, "show_excerpt", 1);
 295
 296         rp = ws_execute(rq);
 297
 298         json_object_put(rq);
 299
 300         if (rp) {
 301                 n = json_object_array_length(rp);
 302                 for (i = 0; i < n; i++) {
 303                         jheadline = json_object_array_get_idx(rp, i);
 304
 305                         j = json_object_object_get(jheadline, "id");
 306                         hid = json_object_get_int(j);
 307                         h = feed_get_headline(feed, hid);
 308
 309                         if (!h) {
 310                                 j = json_object_object_get(jheadline, "title");
 311                                 title = json_object_get_string(j);
 312
 313                                 j = json_object_object_get(jheadline, "link");
 314                                 url = json_object_get_string(j);
 315
 316                                 h = headline_new(hid, url, title);
 317
 318                                 j = json_object_object_get(jheadline,
 319                                                            "excerpt");
 320                                 h->excerpt = strdup(json_object_get_string(j));
 321
 322                                 j = json_object_object_get(jheadline,
 323                                                            "updated");
 324                                 h->date = json_object_get_int(j);
 325
 326                                 tmp = headlines_add(feed->headlines, h);
 327                                 if (feed->headlines)
 328                                         free(feed->headlines);
 329                                 feed->headlines = tmp;
 330                         }
 331
 332                         j = json_object_object_get(jheadline, "unread");
 333                         h->unread = json_object_get_boolean(j);
 334                 }
 335
 336                 if (!feed->headlines) {
 337                         feed->headlines = malloc(sizeof(struct headline *));
 338                         *(feed->headlines) = NULL;
 339                 }
 340
 341                 json_object_put(rp);
 342                 return 1;
 343         } else {
 344                 return 0;
 345         }
 346 }
 347
 348 static struct feed **
 349 feeds_update(struct feed **feeds, struct json_object *jarray)
 350 {
 351         int i, n, id;
 352         struct json_object *jfeed, *j;
 353         const char *url, *title;
 354         struct feed *feed, **tmp;
 355
 356         if (jarray) {
 357                 n = json_object_array_length(jarray);
 358
 359                 for (i = 0; i < n; i++) {
 360                         jfeed = json_object_array_get_idx(jarray, i);
 361
 362                         j = json_object_object_get(jfeed, "id");
 363                         id = json_object_get_int(j);
 364
 365                         feed = feeds_get_feed(feeds, id);
 366
 367                         if (!feed) {
 368                                 j = json_object_object_get(jfeed, "title");
 369                                 title = json_object_get_string(j);
 370
 371                                 j = json_object_object_get(jfeed, "feed_url");
 372                                 url = json_object_get_string(j);
 373
 374                                 feed = feed_new(id, url, title);
 375
 376                                 tmp = feeds_add(feeds, feed);
 377                                 free(feeds);
 378                                 feeds = tmp;
 379                         }
 380
 381                         j = json_object_object_get(jfeed, "unread");
 382                         feed->unread = json_object_get_int(j);
 383
 384                         ws_update_headlines(feed);
 385                 }
 386         }
 387
 388         return feeds;
 389 }
 390
 391 struct feed **ws_update_feeds(struct feed **feeds)
 392 {
 393         struct json_object *rp, *rq;
 394
 395         log_debug("ws_update_feeds()");
 396
 397         rq = ws_request_new("getFeeds");
 398         ws_request_add_att_int(rq, "cat_id", 0);
 399
 400         rp = ws_execute(rq);
 401
 402         if (rp) {
 403                 feeds = feeds_update(feeds, rp);
 404                 json_object_put(rp);
 405         }
 406
 407         ws_request_add_att_int(rq, "cat_id", -3);
 408         rp = ws_execute(rq);
 409         json_object_put(rq);
 410
 411         if (rp) {
 412                 feeds = feeds_update(feeds, rp);
 413                 json_object_put(rp);
 414         }
 415
 416         log_debug("ws_update_feeds() done");
 417
 418         return feeds;
 419 }
 420
 421 struct json_object *ws_request_new_set_article_unread(int id, int unread)
 422 {
 423         struct json_object *rq;
 424
 425         rq = ws_request_new("updateArticle");
 426         json_object_object_add(rq, "article_ids", json_object_new_int(id));
 427         json_object_object_add(rq, "field", json_object_new_int(2));
 428         json_object_object_add(rq, "mode", json_object_new_int(unread));
 429
 430         return rq;
 431 }
 432
 433 void ws_set_article_unread(int id, int unread)
 434 {
 435         struct json_object *rp, *rq;
 436
 437         log_debug("ws_set_article_unread(%d,%d)", id, unread);
 438
 439         rq = ws_request_new_set_article_unread(id, unread);
 440
 441         rp = ws_execute(rq);
 442
 443         json_object_put(rq);
 444
 445         if (rp)
 446                 json_object_put(rp);
 447
 448         log_debug("ws_set_article_unread(%d,%d) done", id, unread);
 449 }
 450
 451 void ws_init()
 452 {
 453         pthread_mutexattr_t attr;
 454         pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
 455         pthread_mutex_init(&lock, &attr);
 456
 457         session = http_session_new();
 458 }