citadel/modules/rssclient/serv_rssclient.c

   1 /*
   2  * Bring external RSS feeds into rooms.
   3  *
   4  * Copyright (c) 2007-2012 by the citadel.org team
   5  *
   6  * This program is open source software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 3.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <stdlib.h>
  16 #include <unistd.h>
  17 #include <stdio.h>
  18
  19 #if TIME_WITH_SYS_TIME
  20 # include <sys/time.h>
  21 # include <time.h>
  22 #else
  23 # if HAVE_SYS_TIME_H
  24 #include <sys/time.h>
  25 # else
  26 #include <time.h>
  27 # endif
  28 #endif
  29
  30 #include <ctype.h>
  31 #include <string.h>
  32 #include <errno.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <expat.h>
  36 #include <curl/curl.h>
  37 #include <libcitadel.h>
  38 #include "citadel.h"
  39 #include "server.h"
  40 #include "citserver.h"
  41 #include "support.h"
  42 #include "config.h"
  43 #include "threads.h"
  44 #include "ctdl_module.h"
  45 #include "msgbase.h"
  46 #include "parsedate.h"
  47 #include "database.h"
  48 #include "citadel_dirs.h"
  49 #include "md5.h"
  50 #include "context.h"
  51 #include "event_client.h"
  52 #include "rss_atom_parser.h"
  53
  54
  55 #define TMP_MSGDATA 0xFF
  56 #define TMP_SHORTER_URL_OFFSET 0xFE
  57 #define TMP_SHORTER_URLS 0xFD
  58
  59 time_t last_run = 0L;
  60
  61 pthread_mutex_t RSSQueueMutex; /* locks the access to the following vars: */
  62 HashList *RSSQueueRooms = NULL; /* rss_room_counter */
  63 HashList *RSSFetchUrls = NULL; /*->rss_aggregator;->RefCount access locked*/
  64
  65 eNextState RSSAggregator_Terminate(AsyncIO *IO);
  66 eNextState RSSAggregator_TerminateDB(AsyncIO *IO);
  67 eNextState RSSAggregator_ShutdownAbort(AsyncIO *IO);
  68 struct CitContext rss_CC;
  69
  70 struct rssnetcfg *rnclist = NULL;
  71 int RSSClientDebugEnabled = 0;
  72 #define N ((rss_aggregator*)IO->Data)->QRnumber
  73
  74 #define DBGLOG(LEVEL) if ((LEVEL != LOG_DEBUG) || (RSSClientDebugEnabled != 0))
  75
  76 #define EVRSSC_syslog(LEVEL, FORMAT, ...)                               \
  77         DBGLOG(LEVEL) syslog(LEVEL,                                     \
  78                              "IO[%ld]CC[%d][%ld]RSS" FORMAT,            \
  79                              IO->ID, CCID, N, __VA_ARGS__)
  80
  81 #define EVRSSCM_syslog(LEVEL, FORMAT)                                   \
  82         DBGLOG(LEVEL) syslog(LEVEL,                                     \
  83                              "IO[%ld]CC[%d][%ld]RSS" FORMAT,            \
  84                              IO->ID, CCID, N)
  85
  86 #define EVRSSQ_syslog(LEVEL, FORMAT, ...)                               \
  87         DBGLOG(LEVEL) syslog(LEVEL, "RSS" FORMAT,                       \
  88                              __VA_ARGS__)
  89 #define EVRSSQM_syslog(LEVEL, FORMAT)                   \
  90         DBGLOG(LEVEL) syslog(LEVEL, "RSS" FORMAT)
  91
  92 #define EVRSSCSM_syslog(LEVEL, FORMAT)                                  \
  93         DBGLOG(LEVEL) syslog(LEVEL, "IO[%ld][%ld]RSS" FORMAT,           \
  94                              IO->ID, N)
  95
  96 void DeleteRoomReference(long QRnumber)
  97 {
  98         HashPos *At;
  99         long HKLen;
 100         const char *HK;
 101         void *vData = NULL;
 102         rss_room_counter *pRoomC;
 103
 104         At = GetNewHashPos(RSSQueueRooms, 0);
 105
 106         if (GetHashPosFromKey(RSSQueueRooms, LKEY(QRnumber), At))
 107         {
 108                 GetHashPos(RSSQueueRooms, At, &HKLen, &HK, &vData);
 109                 if (vData != NULL)
 110                 {
 111                         pRoomC = (rss_room_counter *) vData;
 112                         pRoomC->count --;
 113                         if (pRoomC->count == 0)
 114                                 DeleteEntryFromHash(RSSQueueRooms, At);
 115                 }
 116         }
 117         DeleteHashPos(&At);
 118 }
 119
 120 void UnlinkRooms(rss_aggregator *RSSAggr)
 121 {
 122         DeleteRoomReference(RSSAggr->QRnumber);
 123         if (RSSAggr->OtherQRnumbers != NULL)
 124         {
 125                 long HKLen;
 126                 const char *HK;
 127                 HashPos *At;
 128                 void *vData;
 129
 130                 At = GetNewHashPos(RSSAggr->OtherQRnumbers, 0);
 131                 while (! server_shutting_down &&
 132                        GetNextHashPos(RSSAggr->OtherQRnumbers,
 133                                       At,
 134                                       &HKLen, &HK,
 135                                       &vData) &&
 136                        (vData != NULL))
 137                 {
 138                         long *lData = (long*) vData;
 139                         DeleteRoomReference(*lData);
 140                 }
 141
 142                 DeleteHashPos(&At);
 143         }
 144 }
 145
 146 void UnlinkRSSAggregator(rss_aggregator *RSSAggr)
 147 {
 148         HashPos *At;
 149
 150         pthread_mutex_lock(&RSSQueueMutex);
 151         UnlinkRooms(RSSAggr);
 152
 153         At = GetNewHashPos(RSSFetchUrls, 0);
 154         if (GetHashPosFromKey(RSSFetchUrls, SKEY(RSSAggr->Url), At))
 155         {
 156                 DeleteEntryFromHash(RSSFetchUrls, At);
 157         }
 158         DeleteHashPos(&At);
 159         last_run = time(NULL);
 160         pthread_mutex_unlock(&RSSQueueMutex);
 161 }
 162
 163 void DeleteRssCfg(void *vptr)
 164 {
 165         rss_aggregator *RSSAggr = (rss_aggregator *)vptr;
 166         AsyncIO *IO = &RSSAggr->IO;
 167
 168         if (IO->CitContext != NULL)
 169                 EVRSSCM_syslog(LOG_DEBUG, "RSS: destroying\n");
 170
 171         FreeStrBuf(&RSSAggr->Url);
 172         FreeStrBuf(&RSSAggr->rooms);
 173         FreeStrBuf(&RSSAggr->CData);
 174         FreeStrBuf(&RSSAggr->Key);
 175         DeleteHash(&RSSAggr->OtherQRnumbers);
 176
 177         DeleteHashPos (&RSSAggr->Pos);
 178         DeleteHash (&RSSAggr->Messages);
 179         if (RSSAggr->recp.recp_room != NULL)
 180                 free(RSSAggr->recp.recp_room);
 181
 182
 183         if (RSSAggr->Item != NULL)
 184         {
 185                 flush_rss_item(RSSAggr->Item);
 186
 187                 free(RSSAggr->Item);
 188         }
 189
 190         FreeAsyncIOContents(&RSSAggr->IO);
 191         memset(RSSAggr, 0, sizeof(rss_aggregator));
 192         free(RSSAggr);
 193 }
 194
 195 eNextState RSSAggregator_Terminate(AsyncIO *IO)
 196 {
 197         rss_aggregator *RSSAggr = (rss_aggregator *)IO->Data;
 198
 199         EVRSSCM_syslog(LOG_DEBUG, "RSS: Terminating.\n");
 200
 201         StopCurlWatchers(IO);
 202         UnlinkRSSAggregator(RSSAggr);
 203         return eAbort;
 204 }
 205
 206 eNextState RSSAggregator_TerminateDB(AsyncIO *IO)
 207 {
 208         rss_aggregator *RSSAggr = (rss_aggregator *)IO->Data;
 209
 210         EVRSSCM_syslog(LOG_DEBUG, "RSS: Terminating.\n");
 211
 212
 213         StopDBWatchers(&RSSAggr->IO);
 214         UnlinkRSSAggregator(RSSAggr);
 215         return eAbort;
 216 }
 217
 218 eNextState RSSAggregator_ShutdownAbort(AsyncIO *IO)
 219 {
 220         const char *pUrl;
 221         rss_aggregator *RSSAggr = (rss_aggregator *)IO->Data;
 222
 223         pUrl = IO->ConnectMe->PlainUrl;
 224         if (pUrl == NULL)
 225                 pUrl = "";
 226
 227         EVRSSC_syslog(LOG_DEBUG, "RSS: Aborting by shutdown: %s.\n", pUrl);
 228
 229         StopCurlWatchers(IO);
 230         UnlinkRSSAggregator(RSSAggr);
 231         return eAbort;
 232 }
 233
 234 void AppendLink(StrBuf *Message,
 235                 StrBuf *link,
 236                 StrBuf *LinkTitle,
 237                 const char *Title)
 238 {
 239         if (StrLength(link) > 0)
 240         {
 241                 StrBufAppendBufPlain(Message, HKEY("<a href=\""), 0);
 242                 StrBufAppendBuf(Message, link, 0);
 243                 StrBufAppendBufPlain(Message, HKEY("\">"), 0);
 244                 if (StrLength(LinkTitle) > 0)
 245                         StrBufAppendBuf(Message, LinkTitle, 0);
 246                 else if ((Title != NULL) && !IsEmptyStr(Title))
 247                         StrBufAppendBufPlain(Message, Title, -1, 0);
 248                 else
 249                         StrBufAppendBuf(Message, link, 0);
 250                 StrBufAppendBufPlain(Message, HKEY("</a><br>\n"), 0);
 251         }
 252 }
 253
 254
 255 void rss_format_item(networker_save_message *SaveMsg)
 256 {
 257         StrBuf *Message;
 258         int msglen = 0;
 259
 260         if (SaveMsg->author_or_creator != NULL) {
 261
 262                 char *From;
 263                 StrBuf *Encoded = NULL;
 264                 int FromAt;
 265
 266                 From = html_to_ascii(ChrPtr(SaveMsg->author_or_creator),
 267                                      StrLength(SaveMsg->author_or_creator),
 268                                      512, 0);
 269                 StrBufPlain(SaveMsg->author_or_creator, From, -1);
 270                 StrBufTrim(SaveMsg->author_or_creator);
 271                 free(From);
 272
 273                 FromAt = strchr(ChrPtr(SaveMsg->author_or_creator), '@') != NULL;
 274                 if (!FromAt && StrLength (SaveMsg->author_email) > 0)
 275                 {
 276                         StrBufRFC2047encode(&Encoded, SaveMsg->author_or_creator);
 277                         SaveMsg->Msg.cm_fields['A'] = SmashStrBuf(&Encoded);
 278                         SaveMsg->Msg.cm_fields['P'] =
 279                                 SmashStrBuf(&SaveMsg->author_email);
 280                 }
 281                 else
 282                 {
 283                         if (FromAt)
 284                         {
 285                                 SaveMsg->Msg.cm_fields['A'] =
 286                                         SmashStrBuf(&SaveMsg->author_or_creator);
 287                                 SaveMsg->Msg.cm_fields['P'] =
 288                                         strdup(SaveMsg->Msg.cm_fields['A']);
 289                         }
 290                         else
 291                         {
 292                                 StrBufRFC2047encode(&Encoded,
 293                                                     SaveMsg->author_or_creator);
 294                                 SaveMsg->Msg.cm_fields['A'] =
 295                                         SmashStrBuf(&Encoded);
 296                                 SaveMsg->Msg.cm_fields['P'] =
 297                                         strdup("rss@localhost");
 298
 299                         }
 300                 }
 301         }
 302         else {
 303                 SaveMsg->Msg.cm_fields['A'] = strdup("rss");
 304         }
 305
 306         SaveMsg->Msg.cm_fields['N'] = strdup(NODENAME);
 307         if (SaveMsg->title != NULL) {
 308                 long len;
 309                 char *Sbj;
 310                 StrBuf *Encoded, *QPEncoded;
 311
 312                 QPEncoded = NULL;
 313                 StrBufSpaceToBlank(SaveMsg->title);
 314                 len = StrLength(SaveMsg->title);
 315                 Sbj = html_to_ascii(ChrPtr(SaveMsg->title), len, 512, 0);
 316                 len = strlen(Sbj);
 317                 if ((len > 0) && (Sbj[len - 1] == '\n'))
 318                 {
 319                         len --;
 320                         Sbj[len] = '\0';
 321                 }
 322                 Encoded = NewStrBufPlain(Sbj, len);
 323                 free(Sbj);
 324
 325                 StrBufTrim(Encoded);
 326                 StrBufRFC2047encode(&QPEncoded, Encoded);
 327
 328                 SaveMsg->Msg.cm_fields['U'] = SmashStrBuf(&QPEncoded);
 329                 FreeStrBuf(&Encoded);
 330         }
 331         if (SaveMsg->link == NULL)
 332                 SaveMsg->link = NewStrBufPlain(HKEY(""));
 333
 334 #if 0 /* temporarily disable shorter urls. */
 335         SaveMsg->Msg.cm_fields[TMP_SHORTER_URLS] =
 336                 GetShorterUrls(SaveMsg->description);
 337 #endif
 338
 339         msglen += 1024 + StrLength(SaveMsg->link) + StrLength(SaveMsg->description) ;
 340
 341         Message = NewStrBufPlain(NULL, msglen);
 342
 343         StrBufPlain(Message, HKEY(
 344                             "Content-type: text/html; charset=\"UTF-8\"\r\n\r\n"
 345                             "<html><body>\n"));
 346 #if 0 /* disable shorter url for now. */
 347         SaveMsg->Msg.cm_fields[TMP_SHORTER_URL_OFFSET] = StrLength(Message);
 348 #endif
 349         StrBufAppendBuf(Message, SaveMsg->description, 0);
 350         StrBufAppendBufPlain(Message, HKEY("<br><br>\n"), 0);
 351
 352         AppendLink(Message, SaveMsg->link, SaveMsg->linkTitle, NULL);
 353         AppendLink(Message, SaveMsg->reLink, SaveMsg->reLinkTitle, "Reply to this");
 354         StrBufAppendBufPlain(Message, HKEY("</body></html>\n"), 0);
 355
 356
 357         SaveMsg->Message = Message;
 358 }
 359
 360 eNextState RSSSaveMessage(AsyncIO *IO)
 361 {
 362         long len;
 363         const char *Key;
 364         rss_aggregator *RSSAggr = (rss_aggregator *) IO->Data;
 365
 366         rss_format_item(RSSAggr->ThisMsg);
 367
 368         RSSAggr->ThisMsg->Msg.cm_fields['M'] =
 369                 SmashStrBuf(&RSSAggr->ThisMsg->Message);
 370
 371         CtdlSubmitMsg(&RSSAggr->ThisMsg->Msg, &RSSAggr->recp, NULL, 0);
 372
 373         /* write the uidl to the use table so we don't store this item again */
 374
 375         CheckIfAlreadySeen("RSS Item Insert", RSSAggr->ThisMsg->MsgGUID, IO->Now, 0, eWrite, IO->ID, CCID);
 376
 377         if (GetNextHashPos(RSSAggr->Messages,
 378                            RSSAggr->Pos,
 379                            &len, &Key,
 380                            (void**) &RSSAggr->ThisMsg))
 381                 return NextDBOperation(IO, RSS_FetchNetworkUsetableEntry);
 382         else
 383                 return eAbort;
 384 }
 385
 386 eNextState RSS_FetchNetworkUsetableEntry(AsyncIO *IO)
 387 {
 388         const char *Key;
 389         long len;
 390         rss_aggregator *Ctx = (rss_aggregator *) IO->Data;
 391
 392         /* Find out if we've already seen this item */
 393 // todo: expiry?
 394 #ifndef DEBUG_RSS
 395         if (CheckIfAlreadySeen("RSS Item Seen",
 396                                Ctx->ThisMsg->MsgGUID,
 397                                IO->Now,
 398                                IO->Now - USETABLE_ANTIEXPIRE,
 399                                eCheckUpdate,
 400                                IO->ID, CCID)
 401             != 0)
 402         {
 403                 /* Item has already been seen */
 404                 EVRSSC_syslog(LOG_DEBUG,
 405                           "%s has already been seen\n",
 406                           ChrPtr(Ctx->ThisMsg->MsgGUID));
 407
 408                 if (GetNextHashPos(Ctx->Messages,
 409                                    Ctx->Pos,
 410                                    &len, &Key,
 411                                    (void**) &Ctx->ThisMsg))
 412                         return NextDBOperation(
 413                                 IO,
 414                                 RSS_FetchNetworkUsetableEntry);
 415                 else
 416                         return eAbort;
 417         }
 418         else
 419 #endif
 420         {
 421                 NextDBOperation(IO, RSSSaveMessage);
 422                 return eSendMore;
 423         }
 424         return eSendMore;
 425 }
 426
 427 eNextState RSSAggregator_AnalyseReply(AsyncIO *IO)
 428 {
 429         u_char rawdigest[MD5_DIGEST_LEN];
 430         struct MD5Context md5context;
 431         StrBuf *guid;
 432         rss_aggregator *Ctx = (rss_aggregator *) IO->Data;
 433
 434         if (IO->HttpReq.httpcode != 200)
 435         {
 436                 StrBuf *ErrMsg;
 437                 long lens[2];
 438                 const char *strs[2];
 439
 440                 ErrMsg = NewStrBuf();
 441                 EVRSSC_syslog(LOG_ALERT, "need a 200, got a %ld !\n",
 442                               IO->HttpReq.httpcode);
 443
 444                 strs[0] = ChrPtr(Ctx->Url);
 445                 lens[0] = StrLength(Ctx->Url);
 446
 447                 strs[1] = ChrPtr(Ctx->rooms);
 448                 lens[1] = StrLength(Ctx->rooms);
 449                 StrBufPrintf(ErrMsg,
 450                              "Error while RSS-Aggregation Run of %s\n"
 451                              " need a 200, got a %ld !\n"
 452                              " Response text was: \n"
 453                              " \n %s\n",
 454                              ChrPtr(Ctx->Url),
 455                              IO->HttpReq.httpcode,
 456                              ChrPtr(IO->HttpReq.ReplyData));
 457                 CtdlAideFPMessage(
 458                         ChrPtr(ErrMsg),
 459                         "RSS Aggregation run failure",
 460                         2, strs, (long*) &lens,
 461                         IO->Now,
 462                         IO->ID, CCID);
 463
 464                 FreeStrBuf(&ErrMsg);
 465                 EVRSSC_syslog(LOG_DEBUG,
 466                               "RSS feed returned an invalid http status code. <%s><HTTP %ld>\n",
 467                               ChrPtr(Ctx->Url),
 468                               IO->HttpReq.httpcode);
 469                 return eAbort;
 470         }
 471
 472         MD5Init(&md5context);
 473
 474         MD5Update(&md5context,
 475                   (const unsigned char*)SKEY(IO->HttpReq.ReplyData));
 476
 477         MD5Update(&md5context,
 478                   (const unsigned char*)SKEY(Ctx->Url));
 479
 480         MD5Final(rawdigest, &md5context);
 481         guid = NewStrBufPlain(NULL,
 482                               MD5_DIGEST_LEN * 2 + 12 /* _rss2ctdl*/);
 483         StrBufHexEscAppend(guid, NULL, rawdigest, MD5_DIGEST_LEN);
 484         StrBufAppendBufPlain(guid, HKEY("_rssFM"), 0);
 485         if (StrLength(guid) > 40)
 486                 StrBufCutAt(guid, 40, NULL);
 487         /* Find out if we've already seen this item */
 488
 489 #ifndef DEBUG_RSS
 490
 491         if (CheckIfAlreadySeen("RSS Whole",
 492                                guid,
 493                                IO->Now,
 494                                IO->Now - USETABLE_ANTIEXPIRE,
 495                                eCheckUpdate,
 496                                IO->ID, CCID)
 497             != 0)
 498         {
 499                 FreeStrBuf(&guid);
 500
 501                 EVRSSC_syslog(LOG_DEBUG, "RSS feed already seen. <%s>\n", ChrPtr(Ctx->Url));
 502                 return eAbort;
 503         }
 504         FreeStrBuf(&guid);
 505 #endif
 506         return RSSAggregator_ParseReply(IO);
 507 }
 508
 509 eNextState RSSAggregator_FinishHttp(AsyncIO *IO)
 510 {
 511         return QueueDBOperation(IO, RSSAggregator_AnalyseReply);
 512 }
 513
 514 /*
 515  * Begin a feed parse
 516  */
 517 int rss_do_fetching(rss_aggregator *RSSAggr)
 518 {
 519         AsyncIO         *IO = &RSSAggr->IO;
 520         rss_item *ri;
 521         time_t now;
 522
 523         now = time(NULL);
 524
 525         if ((RSSAggr->next_poll != 0) && (now < RSSAggr->next_poll))
 526                 return 0;
 527
 528         ri = (rss_item*) malloc(sizeof(rss_item));
 529         memset(ri, 0, sizeof(rss_item));
 530         RSSAggr->Item = ri;
 531
 532         if (! InitcURLIOStruct(&RSSAggr->IO,
 533                                RSSAggr,
 534                                "Citadel RSS Client",
 535                                RSSAggregator_FinishHttp,
 536                                RSSAggregator_Terminate,
 537                                RSSAggregator_TerminateDB,
 538                                RSSAggregator_ShutdownAbort))
 539         {
 540                 EVRSSCM_syslog(LOG_ALERT, "Unable to initialize libcurl.\n");
 541                 return 0;
 542         }
 543
 544         safestrncpy(((CitContext*)RSSAggr->IO.CitContext)->cs_host,
 545                     ChrPtr(RSSAggr->Url),
 546                     sizeof(((CitContext*)RSSAggr->IO.CitContext)->cs_host));
 547
 548         EVRSSC_syslog(LOG_DEBUG, "Fetching RSS feed <%s>\n", ChrPtr(RSSAggr->Url));
 549         ParseURL(&RSSAggr->IO.ConnectMe, RSSAggr->Url, 80);
 550         CurlPrepareURL(RSSAggr->IO.ConnectMe);
 551
 552         QueueCurlContext(&RSSAggr->IO);
 553         return 1;
 554 }
 555
 556 /*
 557  * Scan a room's netconfig to determine whether it is requesting any RSS feeds
 558  */
 559 void rssclient_scan_room(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCFG)
 560 {
 561         const RoomNetCfgLine *pLine;
 562         rss_aggregator *RSSAggr = NULL;
 563         rss_aggregator *use_this_RSSAggr = NULL;
 564         void *vptr;
 565
 566         pthread_mutex_lock(&RSSQueueMutex);
 567         if (GetHash(RSSQueueRooms, LKEY(qrbuf->QRnumber), &vptr))
 568         {
 569                 EVRSSQ_syslog(LOG_DEBUG,
 570                               "rssclient: [%ld] %s already in progress.\n",
 571                               qrbuf->QRnumber,
 572                               qrbuf->QRname);
 573                 pthread_mutex_unlock(&RSSQueueMutex);
 574                 return;
 575         }
 576         pthread_mutex_unlock(&RSSQueueMutex);
 577
 578         if (server_shutting_down) return;
 579
 580         pLine = OneRNCFG->NetConfigs[rssclient];
 581
 582         while (pLine != NULL)
 583         {
 584                 const char *lPtr = NULL;
 585
 586                 RSSAggr = (rss_aggregator *) malloc(
 587                         sizeof(rss_aggregator));
 588
 589                 memset (RSSAggr, 0, sizeof(rss_aggregator));
 590                 RSSAggr->QRnumber = qrbuf->QRnumber;
 591                 RSSAggr->roomlist_parts = 1;
 592                 RSSAggr->Url = NewStrBufPlain(NULL, StrLength(pLine->Value[0]));
 593                 StrBufExtract_NextToken(RSSAggr->Url,
 594                                         pLine->Value[0],
 595                                         &lPtr,
 596                                         '|');
 597
 598                 pthread_mutex_lock(&RSSQueueMutex);
 599                 GetHash(RSSFetchUrls,
 600                         SKEY(RSSAggr->Url),
 601                         &vptr);
 602
 603                 use_this_RSSAggr = (rss_aggregator *)vptr;
 604                 if (use_this_RSSAggr != NULL)
 605                 {
 606                         long *QRnumber;
 607                         StrBufAppendBufPlain(
 608                                 use_this_RSSAggr->rooms,
 609                                 qrbuf->QRname,
 610                                 -1, 0);
 611                         if (use_this_RSSAggr->roomlist_parts==1)
 612                         {
 613                                 use_this_RSSAggr->OtherQRnumbers
 614                                         = NewHash(1, lFlathash);
 615                         }
 616                         QRnumber = (long*)malloc(sizeof(long));
 617                         *QRnumber = qrbuf->QRnumber;
 618                         Put(use_this_RSSAggr->OtherQRnumbers,
 619                             LKEY(qrbuf->QRnumber),
 620                             QRnumber,
 621                             NULL);
 622                         use_this_RSSAggr->roomlist_parts++;
 623
 624                         pthread_mutex_unlock(&RSSQueueMutex);
 625
 626                         FreeStrBuf(&RSSAggr->Url);
 627                         free(RSSAggr);
 628                         RSSAggr = NULL;
 629                         pLine = pLine->next;
 630                         continue;
 631                 }
 632                 pthread_mutex_unlock(&RSSQueueMutex);
 633
 634                 RSSAggr->ItemType = RSS_UNSET;
 635
 636                 RSSAggr->rooms = NewStrBufPlain(
 637                         qrbuf->QRname, -1);
 638
 639                 pthread_mutex_lock(&RSSQueueMutex);
 640
 641                 Put(RSSFetchUrls,
 642                     SKEY(RSSAggr->Url),
 643                     RSSAggr,
 644                     DeleteRssCfg);
 645
 646                 pthread_mutex_unlock(&RSSQueueMutex);
 647                 pLine = pLine->next;
 648         }
 649 }
 650
 651 /*
 652  * Scan for rooms that have RSS client requests configured
 653  */
 654 void rssclient_scan(void) {
 655         int RSSRoomCount, RSSCount;
 656         rss_aggregator *rptr = NULL;
 657         void *vrptr = NULL;
 658         HashPos *it;
 659         long len;
 660         const char *Key;
 661         time_t now = time(NULL);
 662
 663         /* Run no more than once every 15 minutes. */
 664         if ((now - last_run) < 900) {
 665                 EVRSSQ_syslog(LOG_DEBUG,
 666                               "Client: polling interval not yet reached; last run was %ldm%lds ago",
 667                               ((now - last_run) / 60),
 668                               ((now - last_run) % 60)
 669                 );
 670                 return;
 671         }
 672
 673         /*
 674          * This is a simple concurrency check to make sure only one rssclient
 675          * run is done at a time.
 676          */
 677         pthread_mutex_lock(&RSSQueueMutex);
 678         RSSCount = GetCount(RSSFetchUrls);
 679         RSSRoomCount = GetCount(RSSQueueRooms);
 680         pthread_mutex_unlock(&RSSQueueMutex);
 681
 682         if ((RSSRoomCount > 0) || (RSSCount > 0)) {
 683                 EVRSSQ_syslog(LOG_DEBUG,
 684                               "rssclient: concurrency check failed; %d rooms and %d url's are queued",
 685                               RSSRoomCount, RSSCount
 686                         );
 687                 return;
 688         }
 689
 690         become_session(&rss_CC);
 691         EVRSSQM_syslog(LOG_DEBUG, "rssclient started");
 692         CtdlForEachNetCfgRoom(rssclient_scan_room, NULL, rssclient);
 693
 694         if (GetCount(RSSFetchUrls) > 0)
 695         {
 696                 pthread_mutex_lock(&RSSQueueMutex);
 697                 EVRSSQ_syslog(LOG_DEBUG,
 698                                "rssclient starting %d Clients",
 699                                GetCount(RSSFetchUrls));
 700
 701                 it = GetNewHashPos(RSSFetchUrls, 0);
 702                 while (!server_shutting_down &&
 703                        GetNextHashPos(RSSFetchUrls, it, &len, &Key, &vrptr) &&
 704                        (vrptr != NULL)) {
 705                         rptr = (rss_aggregator *)vrptr;
 706                         if (!rss_do_fetching(rptr))
 707                                 UnlinkRSSAggregator(rptr);
 708                 }
 709                 DeleteHashPos(&it);
 710                 pthread_mutex_unlock(&RSSQueueMutex);
 711         }
 712         else
 713                 EVRSSQM_syslog(LOG_DEBUG, "Nothing to do.");
 714
 715         EVRSSQM_syslog(LOG_DEBUG, "rssclient ended\n");
 716         return;
 717 }
 718
 719 void rss_cleanup(void)
 720 {
 721         /* citthread_mutex_destroy(&RSSQueueMutex); TODO */
 722         DeleteHash(&RSSFetchUrls);
 723         DeleteHash(&RSSQueueRooms);
 724 }
 725
 726 void LogDebugEnableRSSClient(const int n)
 727 {
 728         RSSClientDebugEnabled = n;
 729 }
 730
 731 CTDL_MODULE_INIT(rssclient)
 732 {
 733         if (!threading)
 734         {
 735                 CtdlREGISTERRoomCfgType(rssclient, ParseGeneric, 0, 1, SerializeGeneric, DeleteGenericCfgLine); /// todo: implement rss specific parser
 736                 pthread_mutex_init(&RSSQueueMutex, NULL);
 737                 RSSQueueRooms = NewHash(1, lFlathash);
 738                 RSSFetchUrls = NewHash(1, NULL);
 739                 syslog(LOG_INFO, "%s\n", curl_version());
 740                 CtdlRegisterSessionHook(rssclient_scan, EVT_TIMER, PRIO_AGGR + 300);
 741                 CtdlRegisterEVCleanupHook(rss_cleanup);
 742                 CtdlRegisterDebugFlagHook(HKEY("rssclient"), LogDebugEnableRSSClient, &RSSClientDebugEnabled);
 743         }
 744         else
 745         {
 746                 CtdlFillSystemContext(&rss_CC, "rssclient");
 747         }
 748         return "rssclient";
 749 }