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         return content;
 148 }
 149
 150 struct json_object *ws_execute(struct json_object *rq)
 151 {
 152         char *err;
 153         struct json_object *result;
 154
 155         log_debug("ws_execute()");
 156         pthread_mutex_lock(&lock);
 157         log_debug("ws_execute() lock");
 158
 159         err = NULL;
 160         result = execute(session, rq, &err);
 161
 162         if (err) {
 163                 log_debug("ws_execute(): error=%s", err);
 164
 165                 if (!strcmp(err, "NOT_LOGGED_IN")) {
 166                         ws_open_session();
 167                         result = execute(session, rq, NULL);
 168                 }
 169
 170                 free(err);
 171         }
 172
 173         log_debug("ws_execute() unlock");
 174         pthread_mutex_unlock(&lock);
 175
 176         log_debug("ws_execute()");
 177
 178         return result;
 179 }
 180
 181 int ws_get_api_version()
 182 {
 183         struct json_object *rp, *rq;
 184         int v;
 185
 186         rq = ws_request_new("getApiLevel");
 187
 188         rp = ws_execute(rq);
 189
 190         json_object_put(rq);
 191
 192         if (rp) {
 193                 v = json_object_get_int(json_object_object_get(rp, "level"));
 194
 195                 json_object_put(rp);
 196         } else {
 197                 v = 0;
 198         }
 199
 200         return v;
 201 }
 202
 203 char *ws_login()
 204 {
 205         struct json_object *rq, *rp, *j;
 206         char *str;
 207
 208         rq = ws_request_new("login");
 209         ws_request_add_att_str(rq, "user", session_user);
 210         ws_request_add_att_str(rq, "password", session_pwd);
 211
 212         rp = ws_execute(rq);
 213         json_object_put(rq);
 214
 215         str = NULL;
 216         if (rp) {
 217                 j = json_object_object_get(rp, "session_id");
 218
 219                 if (j)
 220                         str = strdup(json_object_get_string(j));
 221
 222                 json_object_put(rp);
 223         }
 224
 225         return str;
 226 }
 227
 228 int ws_open_session()
 229 {
 230         int version, result;
 231
 232         log_debug("ws_open_session()");
 233
 234         if (session_id)
 235                 free(session_id);
 236
 237         session_id = NULL;
 238         session_id = ws_login();
 239
 240         if (session_id) {
 241                 version = ws_get_api_version();
 242                 log_debug("API version= %d", version);
 243
 244                 if (version > 0) {
 245                         result = 1;
 246                 } else {
 247                         free(session_id);
 248                         session_id = NULL;
 249                         result = 0;
 250                 }
 251         } else {
 252                 result =  0;
 253         }
 254
 255         return result;
 256 }
 257
 258 char *ws_get_article_content(int id)
 259 {
 260         struct json_object *rp, *rq, *content, *item;
 261         char *str;
 262
 263         rq = ws_request_new("getArticle");
 264         ws_request_add_att_int(rq, "article_id", id);
 265
 266         rp = ws_execute(rq);
 267
 268         json_object_put(rq);
 269
 270         str = NULL;
 271
 272         if (rp) {
 273                 item = json_object_array_get_idx(rp, 0);
 274
 275                 if (item) {
 276                         content = json_object_object_get(item, "content");
 277                         str = strdup(json_object_get_string(content));
 278                 }
 279
 280                 json_object_put(rp);
 281         }
 282
 283         return str;
 284 }
 285
 286 int ws_update_headlines(struct feed *feed)
 287 {
 288         struct json_object *rp, *rq, *jheadline, *j;
 289         int i, n, hid;
 290         struct headline *h, **tmp;
 291         const char *title, *url;
 292
 293         rq = ws_request_new("getHeadlines");
 294         ws_request_add_att_int(rq, "feed_id", feed->id);
 295         ws_request_add_att_bool(rq, "show_excerpt", 1);
 296
 297         rp = ws_execute(rq);
 298
 299         json_object_put(rq);
 300
 301         if (rp) {
 302                 n = json_object_array_length(rp);
 303                 for (i = 0; i < n; i++) {
 304                         jheadline = json_object_array_get_idx(rp, i);
 305
 306                         j = json_object_object_get(jheadline, "id");
 307                         hid = json_object_get_int(j);
 308                         h = feed_get_headline(feed, hid);
 309
 310                         if (!h) {
 311                                 j = json_object_object_get(jheadline, "title");
 312                                 title = json_object_get_string(j);
 313
 314                                 j = json_object_object_get(jheadline, "link");
 315                                 url = json_object_get_string(j);
 316
 317                                 h = headline_new(hid, url, title);
 318
 319                                 j = json_object_object_get(jheadline,
 320                                                            "excerpt");
 321                                 h->excerpt = strdup(json_object_get_string(j));
 322
 323                                 j = json_object_object_get(jheadline,
 324                                                            "updated");
 325                                 h->date = json_object_get_int(j);
 326
 327                                 tmp = headlines_add(feed->headlines, h);
 328                                 if (feed->headlines)
 329                                         free(feed->headlines);
 330                                 feed->headlines = tmp;
 331                         }
 332
 333                         j = json_object_object_get(jheadline, "unread");
 334                         h->unread = json_object_get_boolean(j);
 335                 }
 336
 337                 if (!feed->headlines) {
 338                         feed->headlines = malloc(sizeof(struct headline *));
 339                         *(feed->headlines) = NULL;
 340                 }
 341
 342                 json_object_put(rp);
 343                 return 1;
 344         } else {
 345                 return 0;
 346         }
 347 }
 348
 349 static struct feed **
 350 feeds_update(struct feed **feeds, struct json_object *jarray)
 351 {
 352         int i, n, id;
 353         struct json_object *jfeed, *j;
 354         const char *url, *title;
 355         struct feed *feed, **tmp;
 356
 357         if (jarray) {
 358                 n = json_object_array_length(jarray);
 359
 360                 for (i = 0; i < n; i++) {
 361                         jfeed = json_object_array_get_idx(jarray, i);
 362
 363                         j = json_object_object_get(jfeed, "id");
 364                         id = json_object_get_int(j);
 365
 366                         feed = feeds_get_feed(feeds, id);
 367
 368                         if (!feed) {
 369                                 j = json_object_object_get(jfeed, "title");
 370                                 title = json_object_get_string(j);
 371
 372                                 j = json_object_object_get(jfeed, "feed_url");
 373                                 url = json_object_get_string(j);
 374
 375                                 feed = feed_new(id, url, title);
 376
 377                                 tmp = feeds_add(feeds, feed);
 378                                 free(feeds);
 379                                 feeds = tmp;
 380                         }
 381
 382                         j = json_object_object_get(jfeed, "unread");
 383                         feed->unread = json_object_get_int(j);
 384
 385                         ws_update_headlines(feed);
 386                 }
 387         }
 388
 389         return feeds;
 390 }
 391
 392 struct feed **ws_update_feeds(struct feed **feeds)
 393 {
 394         struct json_object *rp, *rq;
 395
 396         log_debug("ws_update_feeds()");
 397
 398         rq = ws_request_new("getFeeds");
 399         ws_request_add_att_int(rq, "cat_id", 0);
 400
 401         rp = ws_execute(rq);
 402
 403         if (rp) {
 404                 feeds = feeds_update(feeds, rp);
 405                 json_object_put(rp);
 406         }
 407
 408         ws_request_add_att_int(rq, "cat_id", -3);
 409         rp = ws_execute(rq);
 410         json_object_put(rq);
 411
 412         if (rp) {
 413                 feeds = feeds_update(feeds, rp);
 414                 json_object_put(rp);
 415         }
 416
 417         log_debug("ws_update_feeds() done");
 418
 419         return feeds;
 420 }
 421
 422 struct json_object *ws_request_new_set_article_unread(int id, int unread)
 423 {
 424         struct json_object *rq;
 425
 426         rq = ws_request_new("updateArticle");
 427         json_object_object_add(rq, "article_ids", json_object_new_int(id));
 428         json_object_object_add(rq, "field", json_object_new_int(2));
 429         json_object_object_add(rq, "mode", json_object_new_int(unread));
 430
 431         return rq;
 432 }
 433
 434 void ws_set_article_unread(int id, int unread)
 435 {
 436         struct json_object *rp, *rq;
 437
 438         log_debug("ws_set_article_unread(%d,%d)", id, unread);
 439
 440         rq = ws_request_new_set_article_unread(id, unread);
 441
 442         rp = ws_execute(rq);
 443
 444         json_object_put(rq);
 445
 446         if (rp)
 447                 json_object_put(rp);
 448
 449         log_debug("ws_set_article_unread(%d,%d) done", id, unread);
 450 }
 451
 452 void ws_init()
 453 {
 454         pthread_mutexattr_t attr;
 455         pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
 456         pthread_mutex_init(&lock, &attr);
 457
 458         session = http_session_new();
 459 }