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                                 content = NULL;
 138
 139                                 if (err)
 140                                         *err = strdup(str);
 141                         } else {
 142                                 json_object_get(content);
 143                         }
 144                 }
 145
 146                 json_object_put(rp);
 147         }
 148
 149         log_debug("execute() done");
 150
 151         return content;
 152 }
 153
 154 struct json_object *ws_execute(struct json_object *rq)
 155 {
 156         char *err;
 157         struct json_object *result;
 158
 159         log_debug("ws_execute()");
 160         pthread_mutex_lock(&lock);
 161         log_debug("ws_execute() lock");
 162
 163         err = NULL;
 164         result = execute(session, rq, &err);
 165
 166         if (err) {
 167                 log_debug("ws_execute(): error=%s", err);
 168
 169                 if (!strcmp(err, "NOT_LOGGED_IN")) {
 170                         ws_open_session();
 171                         result = execute(session, rq, NULL);
 172                 }
 173
 174                 free(err);
 175         }
 176
 177         log_debug("ws_execute() unlock");
 178         pthread_mutex_unlock(&lock);
 179
 180         log_debug("ws_execute()");
 181
 182         return result;
 183 }
 184
 185 int ws_get_api_version()
 186 {
 187         struct json_object *rp, *rq;
 188         int v;
 189
 190         rq = ws_request_new("getApiLevel");
 191
 192         rp = ws_execute(rq);
 193
 194         json_object_put(rq);
 195
 196         if (rp) {
 197                 v = json_object_get_int(json_object_object_get(rp, "level"));
 198
 199                 json_object_put(rp);
 200         } else {
 201                 v = 0;
 202         }
 203
 204         return v;
 205 }
 206
 207 char *ws_login()
 208 {
 209         struct json_object *rq, *rp, *j;
 210         char *str;
 211
 212         rq = ws_request_new("login");
 213         ws_request_add_att_str(rq, "user", session_user);
 214         ws_request_add_att_str(rq, "password", session_pwd);
 215
 216         rp = ws_execute(rq);
 217         json_object_put(rq);
 218
 219         str = NULL;
 220         if (rp) {
 221                 j = json_object_object_get(rp, "session_id");
 222
 223                 if (j)
 224                         str = strdup(json_object_get_string(j));
 225
 226                 json_object_put(rp);
 227         }
 228
 229         return str;
 230 }
 231
 232 int ws_open_session()
 233 {
 234         int version, result;
 235
 236         log_debug("ws_open_session()");
 237
 238         if (session_id)
 239                 free(session_id);
 240
 241         session_id = NULL;
 242         session_id = ws_login();
 243
 244         if (session_id) {
 245                 version = ws_get_api_version();
 246                 log_debug("API version= %d", version);
 247
 248                 if (version > 0) {
 249                         result = 1;
 250                 } else {
 251                         free(session_id);
 252                         session_id = NULL;
 253                         result = 0;
 254                 }
 255         } else {
 256                 result =  0;
 257         }
 258
 259         return result;
 260 }
 261
 262 char *ws_get_article_content(int id)
 263 {
 264         struct json_object *rp, *rq, *content, *item;
 265         char *str;
 266
 267         rq = ws_request_new("getArticle");
 268         ws_request_add_att_int(rq, "article_id", id);
 269
 270         rp = ws_execute(rq);
 271
 272         json_object_put(rq);
 273
 274         str = NULL;
 275
 276         if (rp) {
 277                 item = json_object_array_get_idx(rp, 0);
 278
 279                 if (item) {
 280                         content = json_object_object_get(item, "content");
 281                         str = strdup(json_object_get_string(content));
 282                 }
 283
 284                 json_object_put(rp);
 285         }
 286
 287         return str;
 288 }
 289
 290 int ws_update_headlines(struct feed *feed)
 291 {
 292         struct json_object *rp, *rq, *jheadline, *j;
 293         int i, n, hid;
 294         struct headline *h, **tmp;
 295         const char *title, *url;
 296
 297         rq = ws_request_new("getHeadlines");
 298         ws_request_add_att_int(rq, "feed_id", feed->id);
 299         ws_request_add_att_bool(rq, "show_excerpt", 1);
 300
 301         rp = ws_execute(rq);
 302
 303         json_object_put(rq);
 304
 305         if (rp) {
 306                 n = json_object_array_length(rp);
 307                 for (i = 0; i < n; i++) {
 308                         jheadline = json_object_array_get_idx(rp, i);
 309
 310                         j = json_object_object_get(jheadline, "id");
 311                         hid = json_object_get_int(j);
 312                         h = feed_get_headline(feed, hid);
 313
 314                         if (!h) {
 315                                 j = json_object_object_get(jheadline, "title");
 316                                 title = json_object_get_string(j);
 317
 318                                 j = json_object_object_get(jheadline, "link");
 319                                 url = json_object_get_string(j);
 320
 321                                 h = headline_new(hid, url, title);
 322
 323                                 j = json_object_object_get(jheadline,
 324                                                            "excerpt");
 325                                 h->excerpt = strdup(json_object_get_string(j));
 326
 327                                 j = json_object_object_get(jheadline,
 328                                                            "updated");
 329                                 h->date = json_object_get_int(j);
 330
 331                                 tmp = headlines_add(feed->headlines, h);
 332                                 if (feed->headlines)
 333                                         free(feed->headlines);
 334                                 feed->headlines = tmp;
 335                         }
 336
 337                         j = json_object_object_get(jheadline, "unread");
 338                         h->unread = json_object_get_boolean(j);
 339                 }
 340
 341                 if (!feed->headlines) {
 342                         feed->headlines = malloc(sizeof(struct headline *));
 343                         *(feed->headlines) = NULL;
 344                 }
 345
 346                 json_object_put(rp);
 347                 return 1;
 348         } else {
 349                 return 0;
 350         }
 351 }
 352
 353 static struct feed **
 354 feeds_update(struct feed **feeds, struct json_object *jarray)
 355 {
 356         int i, n, id;
 357         struct json_object *jfeed, *j;
 358         const char *url, *title;
 359         struct feed *feed, **tmp;
 360
 361         if (jarray) {
 362                 n = json_object_array_length(jarray);
 363
 364                 for (i = 0; i < n; i++) {
 365                         jfeed = json_object_array_get_idx(jarray, i);
 366
 367                         j = json_object_object_get(jfeed, "id");
 368                         id = json_object_get_int(j);
 369
 370                         feed = feeds_get_feed(feeds, id);
 371
 372                         if (!feed) {
 373                                 j = json_object_object_get(jfeed, "title");
 374                                 title = json_object_get_string(j);
 375
 376                                 j = json_object_object_get(jfeed, "feed_url");
 377                                 url = json_object_get_string(j);
 378
 379                                 feed = feed_new(id, url, title);
 380
 381                                 tmp = feeds_add(feeds, feed);
 382                                 free(feeds);
 383                                 feeds = tmp;
 384                         }
 385
 386                         j = json_object_object_get(jfeed, "unread");
 387                         feed->unread = json_object_get_int(j);
 388
 389                         ws_update_headlines(feed);
 390                 }
 391         }
 392
 393         return feeds;
 394 }
 395
 396 struct feed **ws_update_feeds(struct feed **feeds)
 397 {
 398         struct json_object *rp, *rq;
 399
 400         log_debug("ws_update_feeds()");
 401
 402         rq = ws_request_new("getFeeds");
 403         ws_request_add_att_int(rq, "cat_id", 0);
 404
 405         rp = ws_execute(rq);
 406
 407         if (rp) {
 408                 feeds = feeds_update(feeds, rp);
 409                 json_object_put(rp);
 410         }
 411
 412         ws_request_add_att_int(rq, "cat_id", -3);
 413         rp = ws_execute(rq);
 414         json_object_put(rq);
 415
 416         if (rp) {
 417                 feeds = feeds_update(feeds, rp);
 418                 json_object_put(rp);
 419         }
 420
 421         log_debug("ws_update_feeds() done");
 422
 423         return feeds;
 424 }
 425
 426 struct json_object *ws_request_new_set_article_unread(int id, int unread)
 427 {
 428         struct json_object *rq;
 429
 430         rq = ws_request_new("updateArticle");
 431         json_object_object_add(rq, "article_ids", json_object_new_int(id));
 432         json_object_object_add(rq, "field", json_object_new_int(2));
 433         json_object_object_add(rq, "mode", json_object_new_int(unread));
 434
 435         return rq;
 436 }
 437
 438 void ws_set_article_unread(int id, int unread)
 439 {
 440         struct json_object *rp, *rq;
 441
 442         log_debug("ws_set_article_unread(%d,%d)", id, unread);
 443
 444         rq = ws_request_new_set_article_unread(id, unread);
 445
 446         rp = ws_execute(rq);
 447
 448         json_object_put(rq);
 449
 450         if (rp)
 451                 json_object_put(rp);
 452
 453         log_debug("ws_set_article_unread(%d,%d) done", id, unread);
 454 }
 455
 456 void ws_init()
 457 {
 458         pthread_mutexattr_t attr;
 459         pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
 460         pthread_mutex_init(&lock, &attr);
 461
 462         session = http_session_new();
 463 }