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         if (json_object_get_type(content) != json_type_object)
 107                 return NULL;
 108
 109         jerror = json_object_object_get(content, "error");
 110
 111         if (!jerror)
 112                 return NULL;
 113
 114         return json_object_get_string(jerror);
 115 }
 116
 117 static struct json_object *
 118 execute(struct http_session *sess, struct json_object *rq, char **err)
 119 {
 120         struct json_object *rp, *content;
 121         const char *str;
 122
 123         rp = http_json_get(sess, session_url, rq);
 124
 125         content = NULL;
 126
 127         if (rp) {
 128                 content = ws_reply_get_content(rp);
 129
 130                 if (content) {
 131                         str = ws_reply_get_error(content);
 132
 133                         if (str) {
 134                                 *err = strdup(str);
 135                                 content = NULL;
 136                         } else {
 137                                 json_object_get(content);
 138                         }
 139                 }
 140
 141                 json_object_put(rp);
 142         }
 143
 144         return content;
 145 }
 146
 147 struct json_object *ws_execute(struct json_object *rq)
 148 {
 149         char *err;
 150         struct json_object *result;
 151
 152         log_debug("ws_execute()");
 153         pthread_mutex_lock(&lock);
 154         log_debug("ws_execute() lock");
 155
 156         err = NULL;
 157         result = execute(session, rq, &err);
 158
 159         if (err) {
 160                 log_debug("ws_execute(): error=%s", err);
 161
 162                 if (!strcmp(err, "NOT_LOGGED_IN")) {
 163                         ws_open_session();
 164                         result = execute(session, rq, NULL);
 165                 }
 166
 167                 free(err);
 168         }
 169
 170         log_debug("ws_execute() unlock");
 171         pthread_mutex_unlock(&lock);
 172
 173         log_debug("ws_execute()");
 174
 175         return result;
 176 }
 177
 178 int ws_get_api_version()
 179 {
 180         struct json_object *rp, *rq;
 181         int v;
 182
 183         rq = ws_request_new("getApiLevel");
 184
 185         rp = ws_execute(rq);
 186
 187         json_object_put(rq);
 188
 189         if (rp) {
 190                 v = json_object_get_int(json_object_object_get(rp, "level"));
 191
 192                 json_object_put(rp);
 193         } else {
 194                 v = 0;
 195         }
 196
 197         return v;
 198 }
 199
 200 char *ws_login()
 201 {
 202         struct json_object *rq, *rp, *j;
 203         char *str;
 204
 205         rq = ws_request_new("login");
 206         ws_request_add_att_str(rq, "user", session_user);
 207         ws_request_add_att_str(rq, "password", session_pwd);
 208
 209         rp = ws_execute(rq);
 210         json_object_put(rq);
 211
 212         str = NULL;
 213         if (rp) {
 214                 j = json_object_object_get(rp, "session_id");
 215
 216                 if (j)
 217                         str = strdup(json_object_get_string(j));
 218
 219                 json_object_put(rp);
 220         }
 221
 222         return str;
 223 }
 224
 225 int ws_open_session()
 226 {
 227         int version, result;
 228
 229         log_debug("ws_open_session()");
 230
 231         if (session_id)
 232                 free(session_id);
 233
 234         session_id = NULL;
 235         session_id = ws_login();
 236
 237         if (session_id) {
 238                 version = ws_get_api_version();
 239                 log_debug("API version= %d", version);
 240
 241                 if (version > 0) {
 242                         result = 1;
 243                 } else {
 244                         free(session_id);
 245                         session_id = NULL;
 246                         result = 0;
 247                 }
 248         } else {
 249                 result =  0;
 250         }
 251
 252         return result;
 253 }
 254
 255 char *ws_get_article_content(int id)
 256 {
 257         struct json_object *rp, *rq, *content, *item;
 258         char *str;
 259
 260         rq = ws_request_new("getArticle");
 261         ws_request_add_att_int(rq, "article_id", id);
 262
 263         rp = ws_execute(rq);
 264
 265         json_object_put(rq);
 266
 267         str = NULL;
 268
 269         if (rp) {
 270                 item = json_object_array_get_idx(rp, 0);
 271
 272                 if (item) {
 273                         content = json_object_object_get(item, "content");
 274                         str = strdup(json_object_get_string(content));
 275                 }
 276
 277                 json_object_put(rp);
 278         }
 279
 280         return str;
 281 }
 282
 283 int ws_update_headlines(struct feed *feed)
 284 {
 285         struct json_object *rp, *rq, *jheadline, *j;
 286         int i, n, hid;
 287         struct headline *h, **tmp;
 288         const char *title, *url;
 289
 290         rq = ws_request_new("getHeadlines");
 291         ws_request_add_att_int(rq, "feed_id", feed->id);
 292         ws_request_add_att_bool(rq, "show_excerpt", 1);
 293
 294         rp = ws_execute(rq);
 295
 296         json_object_put(rq);
 297
 298         if (rp) {
 299                 n = json_object_array_length(rp);
 300                 for (i = 0; i < n; i++) {
 301                         jheadline = json_object_array_get_idx(rp, i);
 302
 303                         j = json_object_object_get(jheadline, "id");
 304                         hid = json_object_get_int(j);
 305                         h = feed_get_headline(feed, hid);
 306
 307                         if (!h) {
 308                                 j = json_object_object_get(jheadline, "title");
 309                                 title = json_object_get_string(j);
 310
 311                                 j = json_object_object_get(jheadline, "link");
 312                                 url = json_object_get_string(j);
 313
 314                                 h = headline_new(hid, url, title);
 315
 316                                 j = json_object_object_get(jheadline,
 317                                                            "excerpt");
 318                                 h->excerpt = strdup(json_object_get_string(j));
 319
 320                                 j = json_object_object_get(jheadline,
 321                                                            "updated");
 322                                 h->date = json_object_get_int(j);
 323
 324                                 tmp = headlines_add(feed->headlines, h);
 325                                 if (feed->headlines)
 326                                         free(feed->headlines);
 327                                 feed->headlines = tmp;
 328                         }
 329
 330                         j = json_object_object_get(jheadline, "unread");
 331                         h->unread = json_object_get_boolean(j);
 332                 }
 333
 334                 if (!feed->headlines) {
 335                         feed->headlines = malloc(sizeof(struct headline *));
 336                         *(feed->headlines) = NULL;
 337                 }
 338
 339                 json_object_put(rp);
 340                 return 1;
 341         } else {
 342                 return 0;
 343         }
 344 }
 345
 346 static struct feed **
 347 feeds_update(struct feed **feeds, struct json_object *jarray)
 348 {
 349         int i, n, id;
 350         struct json_object *jfeed, *j;
 351         const char *url, *title;
 352         struct feed *feed, **tmp;
 353
 354         if (jarray) {
 355                 n = json_object_array_length(jarray);
 356
 357                 for (i = 0; i < n; i++) {
 358                         jfeed = json_object_array_get_idx(jarray, i);
 359
 360                         j = json_object_object_get(jfeed, "id");
 361                         id = json_object_get_int(j);
 362
 363                         feed = feeds_get_feed(feeds, id);
 364
 365                         if (!feed) {
 366                                 j = json_object_object_get(jfeed, "title");
 367                                 title = json_object_get_string(j);
 368
 369                                 j = json_object_object_get(jfeed, "feed_url");
 370                                 url = json_object_get_string(j);
 371
 372                                 feed = feed_new(id, url, title);
 373
 374                                 tmp = feeds_add(feeds, feed);
 375                                 free(feeds);
 376                                 feeds = tmp;
 377                         }
 378
 379                         j = json_object_object_get(jfeed, "unread");
 380                         feed->unread = json_object_get_int(j);
 381
 382                         ws_update_headlines(feed);
 383                 }
 384         }
 385
 386         return feeds;
 387 }
 388
 389 struct feed **ws_update_feeds(struct feed **feeds)
 390 {
 391         struct json_object *rp, *rq;
 392
 393         log_debug("ws_update_feeds()");
 394
 395         rq = ws_request_new("getFeeds");
 396         ws_request_add_att_int(rq, "cat_id", 0);
 397
 398         rp = ws_execute(rq);
 399
 400         if (rp) {
 401                 feeds = feeds_update(feeds, rp);
 402                 json_object_put(rp);
 403         }
 404
 405         ws_request_add_att_int(rq, "cat_id", -3);
 406         rp = ws_execute(rq);
 407         json_object_put(rq);
 408
 409         if (rp) {
 410                 feeds = feeds_update(feeds, rp);
 411                 json_object_put(rp);
 412         }
 413
 414         log_debug("ws_update_feeds() done");
 415
 416         return feeds;
 417 }
 418
 419 struct json_object *ws_request_new_set_article_unread(int id, int unread)
 420 {
 421         struct json_object *rq;
 422
 423         rq = ws_request_new("updateArticle");
 424         json_object_object_add(rq, "article_ids", json_object_new_int(id));
 425         json_object_object_add(rq, "field", json_object_new_int(2));
 426         json_object_object_add(rq, "mode", json_object_new_int(unread));
 427
 428         return rq;
 429 }
 430
 431 void ws_set_article_unread(int id, int unread)
 432 {
 433         struct json_object *rp, *rq;
 434
 435         log_debug("ws_set_article_unread(%d,%d)", id, unread);
 436
 437         rq = ws_request_new_set_article_unread(id, unread);
 438
 439         rp = ws_execute(rq);
 440
 441         json_object_put(rq);
 442
 443         if (rp)
 444                 json_object_put(rp);
 445
 446         log_debug("ws_set_article_unread(%d,%d) done", id, unread);
 447 }
 448
 449 void ws_init()
 450 {
 451         pthread_mutexattr_t attr;
 452         pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
 453         pthread_mutex_init(&lock, &attr);
 454
 455         session = http_session_new();
 456 }