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)->Cfg.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                              "%s[%ld]CC[%d][%ld]RSS" FORMAT,            \
  79                              IOSTR, IO->ID, CCID, N, __VA_ARGS__)
  80
  81 #define EVRSSCM_syslog(LEVEL, FORMAT)                                   \
  82         DBGLOG(LEVEL) syslog(LEVEL,                                     \
  83                              "%s[%ld]CC[%d][%ld]RSS" FORMAT,            \
  84                              IOSTR, 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, "%s[%ld][%ld]RSS" FORMAT,           \
  94                              IOSTR, IO->ID, N)
  95
  96 typedef enum _RSSState {
  97         eRSSCreated,
  98         eRSSFetching,
  99         eRSSFailure,
 100         eRSSParsing,
 101         eRSSUT
 102 } RSSState;
 103 ConstStr RSSStates[] = {
 104         {HKEY("Aggregator created")},
 105         {HKEY("Fetching content")},
 106         {HKEY("Failed")},
 107         {HKEY("parsing content")},
 108         {HKEY("checking usetable")}
 109 };
 110
 111 static void SetRSSState(AsyncIO *IO, RSSState State)
 112 {
 113         CitContext* CCC = IO->CitContext;
 114         if (CCC != NULL)
 115                 memcpy(CCC->cs_clientname, RSSStates[State].Key, RSSStates[State].len + 1);
 116 }
 117
 118 void DeleteRoomReference(long QRnumber)
 119 {
 120         HashPos *At;
 121         long HKLen;
 122         const char *HK;
 123         void *vData = NULL;
 124         rss_room_counter *pRoomC;
 125
 126         At = GetNewHashPos(RSSQueueRooms, 0);
 127
 128         if (GetHashPosFromKey(RSSQueueRooms, LKEY(QRnumber), At))
 129         {
 130                 GetHashPos(RSSQueueRooms, At, &HKLen, &HK, &vData);
 131                 if (vData != NULL)
 132                 {
 133                         pRoomC = (rss_room_counter *) vData;
 134                         pRoomC->count --;
 135                         if (pRoomC->count == 0)
 136                                 DeleteEntryFromHash(RSSQueueRooms, At);
 137                 }
 138         }
 139         DeleteHashPos(&At);
 140 }
 141
 142 void UnlinkRooms(rss_aggregator *RSSAggr)
 143 {
 144         DeleteRoomReference(RSSAggr->Cfg.QRnumber);
 145         if (RSSAggr->OtherQRnumbers != NULL)
 146         {
 147                 long HKLen;
 148                 const char *HK;
 149                 HashPos *At;
 150                 void *vData;
 151
 152                 At = GetNewHashPos(RSSAggr->OtherQRnumbers, 0);
 153                 while (! server_shutting_down &&
 154                        GetNextHashPos(RSSAggr->OtherQRnumbers,
 155                                       At,
 156                                       &HKLen, &HK,
 157                                       &vData) &&
 158                        (vData != NULL))
 159                 {
 160                         pRSSConfig *Data = (pRSSConfig*) vData;
 161                         DeleteRoomReference(Data->QRnumber);
 162                 }
 163
 164                 DeleteHashPos(&At);
 165         }
 166 }
 167
 168 void UnlinkRSSAggregator(rss_aggregator *RSSAggr)
 169 {
 170         HashPos *At;
 171
 172         pthread_mutex_lock(&RSSQueueMutex);
 173         UnlinkRooms(RSSAggr);
 174
 175         At = GetNewHashPos(RSSFetchUrls, 0);
 176         if (GetHashPosFromKey(RSSFetchUrls, SKEY(RSSAggr->Url), At))
 177         {
 178                 DeleteEntryFromHash(RSSFetchUrls, At);
 179         }
 180         DeleteHashPos(&At);
 181         last_run = time(NULL);
 182         pthread_mutex_unlock(&RSSQueueMutex);
 183 }
 184
 185 void DeleteRssCfg(void *vptr)
 186 {
 187         rss_aggregator *RSSAggr = (rss_aggregator *)vptr;
 188         AsyncIO *IO = &RSSAggr->IO;
 189
 190         if (IO->CitContext != NULL)
 191                 EVRSSCM_syslog(LOG_DEBUG, "RSS: destroying\n");
 192
 193         FreeStrBuf(&RSSAggr->Url);
 194         FreeStrBuf(&RSSAggr->rooms);
 195         FreeStrBuf(&RSSAggr->CData);
 196         FreeStrBuf(&RSSAggr->Key);
 197         DeleteHash(&RSSAggr->OtherQRnumbers);
 198
 199         DeleteHashPos (&RSSAggr->Pos);
 200         DeleteHash (&RSSAggr->Messages);
 201         if (RSSAggr->recp.recp_room != NULL)
 202                 free(RSSAggr->recp.recp_room);
 203
 204
 205         if (RSSAggr->Item != NULL)
 206         {
 207                 flush_rss_item(RSSAggr->Item);
 208
 209                 free(RSSAggr->Item);
 210         }
 211
 212         FreeAsyncIOContents(&RSSAggr->IO);
 213         memset(RSSAggr, 0, sizeof(rss_aggregator));
 214         free(RSSAggr);
 215 }
 216
 217 eNextState RSSAggregator_Terminate(AsyncIO *IO)
 218 {
 219         rss_aggregator *RSSAggr = (rss_aggregator *)IO->Data;
 220
 221         EVRSSCM_syslog(LOG_DEBUG, "RSS: Terminating.\n");
 222
 223         StopCurlWatchers(IO);
 224         UnlinkRSSAggregator(RSSAggr);
 225         return eAbort;
 226 }
 227
 228 eNextState RSSAggregator_TerminateDB(AsyncIO *IO)
 229 {
 230         rss_aggregator *RSSAggr = (rss_aggregator *)IO->Data;
 231
 232         EVRSSCM_syslog(LOG_DEBUG, "RSS: Terminating.\n");
 233
 234
 235         StopDBWatchers(&RSSAggr->IO);
 236         UnlinkRSSAggregator(RSSAggr);
 237         return eAbort;
 238 }
 239
 240 eNextState RSSAggregator_ShutdownAbort(AsyncIO *IO)
 241 {
 242         const char *pUrl;
 243         rss_aggregator *RSSAggr = (rss_aggregator *)IO->Data;
 244
 245         pUrl = IO->ConnectMe->PlainUrl;
 246         if (pUrl == NULL)
 247                 pUrl = "";
 248
 249         EVRSSC_syslog(LOG_DEBUG, "RSS: Aborting by shutdown: %s.\n", pUrl);
 250
 251         StopCurlWatchers(IO);
 252         UnlinkRSSAggregator(RSSAggr);
 253         return eAbort;
 254 }
 255
 256 void AppendLink(StrBuf *Message,
 257                 StrBuf *link,
 258                 StrBuf *LinkTitle,
 259                 const char *Title)
 260 {
 261         if (StrLength(link) > 0)
 262         {
 263                 StrBufAppendBufPlain(Message, HKEY("<a href=\""), 0);
 264                 StrBufAppendBuf(Message, link, 0);
 265                 StrBufAppendBufPlain(Message, HKEY("\">"), 0);
 266                 if (StrLength(LinkTitle) > 0)
 267                         StrBufAppendBuf(Message, LinkTitle, 0);
 268                 else if ((Title != NULL) && !IsEmptyStr(Title))
 269                         StrBufAppendBufPlain(Message, Title, -1, 0);
 270                 else
 271                         StrBufAppendBuf(Message, link, 0);
 272                 StrBufAppendBufPlain(Message, HKEY("</a><br>\n"), 0);
 273         }
 274 }
 275
 276
 277 int rss_format_item(AsyncIO *IO, networker_save_message *SaveMsg)
 278 {
 279         StrBuf *Message;
 280         int msglen = 0;
 281
 282         if (StrLength(SaveMsg->description) +
 283             StrLength(SaveMsg->link) +
 284             StrLength(SaveMsg->linkTitle) +
 285             StrLength(SaveMsg->reLink) +
 286             StrLength(SaveMsg->reLinkTitle) +
 287             StrLength(SaveMsg->title) == 0)
 288         {
 289                 EVRSSCM_syslog(LOG_INFO, "Refusing to save empty message.");
 290                 return 0;
 291         }
 292
 293         CM_Flush(&SaveMsg->Msg);
 294
 295         if (SaveMsg->author_or_creator != NULL) {
 296
 297                 char *From;
 298                 StrBuf *Encoded = NULL;
 299                 int FromAt;
 300
 301                 From = html_to_ascii(ChrPtr(SaveMsg->author_or_creator),
 302                                      StrLength(SaveMsg->author_or_creator),
 303                                      512, 0);
 304                 StrBufPlain(SaveMsg->author_or_creator, From, -1);
 305                 StrBufTrim(SaveMsg->author_or_creator);
 306                 free(From);
 307
 308                 FromAt = strchr(ChrPtr(SaveMsg->author_or_creator), '@') != NULL;
 309                 if (!FromAt && StrLength (SaveMsg->author_email) > 0)
 310                 {
 311                         StrBufRFC2047encode(&Encoded, SaveMsg->author_or_creator);
 312                         CM_SetAsFieldSB(&SaveMsg->Msg, eAuthor, &Encoded);
 313                         CM_SetAsFieldSB(&SaveMsg->Msg, eMessagePath, &SaveMsg->author_email);
 314                 }
 315                 else
 316                 {
 317                         if (FromAt)
 318                         {
 319                                 CM_SetAsFieldSB(&SaveMsg->Msg, eAuthor, &SaveMsg->author_or_creator);
 320                                 CM_CopyField(&SaveMsg->Msg, eMessagePath, eAuthor);
 321                         }
 322                         else
 323                         {
 324                                 StrBufRFC2047encode(&Encoded,
 325                                                     SaveMsg->author_or_creator);
 326                                 CM_SetAsFieldSB(&SaveMsg->Msg, eAuthor, &Encoded);
 327                                 CM_SetField(&SaveMsg->Msg, eMessagePath, HKEY("rss@localhost"));
 328
 329                         }
 330                 }
 331         }
 332         else {
 333                 CM_SetField(&SaveMsg->Msg, eAuthor, HKEY("rss"));
 334         }
 335
 336         CM_SetField(&SaveMsg->Msg, eNodeName, CFG_KEY(c_nodename));
 337         if (SaveMsg->title != NULL) {
 338                 long len;
 339                 char *Sbj;
 340                 StrBuf *Encoded, *QPEncoded;
 341
 342                 QPEncoded = NULL;
 343                 StrBufSpaceToBlank(SaveMsg->title);
 344                 len = StrLength(SaveMsg->title);
 345                 Sbj = html_to_ascii(ChrPtr(SaveMsg->title), len, 512, 0);
 346                 len = strlen(Sbj);
 347                 if ((len > 0) && (Sbj[len - 1] == '\n'))
 348                 {
 349                         len --;
 350                         Sbj[len] = '\0';
 351                 }
 352                 Encoded = NewStrBufPlain(Sbj, len);
 353                 free(Sbj);
 354
 355                 StrBufTrim(Encoded);
 356                 StrBufRFC2047encode(&QPEncoded, Encoded);
 357
 358                 CM_SetAsFieldSB(&SaveMsg->Msg, eMsgSubject, &QPEncoded);
 359                 FreeStrBuf(&Encoded);
 360         }
 361         if (SaveMsg->link == NULL)
 362                 SaveMsg->link = NewStrBufPlain(HKEY(""));
 363
 364 #if 0 /* temporarily disable shorter urls. */
 365         SaveMsg->Msg.cm_fields[TMP_SHORTER_URLS] =
 366                 GetShorterUrls(SaveMsg->description);
 367 #endif
 368
 369         msglen += 1024 + StrLength(SaveMsg->link) + StrLength(SaveMsg->description) ;
 370
 371         Message = NewStrBufPlain(NULL, msglen);
 372
 373         StrBufPlain(Message, HKEY(
 374                             "Content-type: text/html; charset=\"UTF-8\"\r\n\r\n"
 375                             "<html><body>\n"));
 376 #if 0 /* disable shorter url for now. */
 377         SaveMsg->Msg.cm_fields[TMP_SHORTER_URL_OFFSET] = StrLength(Message);
 378 #endif
 379         StrBufAppendBuf(Message, SaveMsg->description, 0);
 380         StrBufAppendBufPlain(Message, HKEY("<br><br>\n"), 0);
 381
 382         AppendLink(Message, SaveMsg->link, SaveMsg->linkTitle, NULL);
 383         AppendLink(Message, SaveMsg->reLink, SaveMsg->reLinkTitle, "Reply to this");
 384         StrBufAppendBufPlain(Message, HKEY("</body></html>\n"), 0);
 385
 386         SaveMsg->Message = Message;
 387         return 1;
 388 }
 389
 390 eNextState RSSSaveMessage(AsyncIO *IO)
 391 {
 392         long len;
 393         const char *Key;
 394         rss_aggregator *RSSAggr = (rss_aggregator *) IO->Data;
 395
 396         if (rss_format_item(IO, RSSAggr->ThisMsg))
 397         {
 398                 CM_SetAsFieldSB(&RSSAggr->ThisMsg->Msg, eMesageText,
 399                                        &RSSAggr->ThisMsg->Message);
 400
 401                 CtdlSubmitMsg(&RSSAggr->ThisMsg->Msg, &RSSAggr->recp, NULL, 0);
 402
 403                 /* write the uidl to the use table so we don't store this item again */
 404
 405                 CheckIfAlreadySeen("RSS Item Insert", RSSAggr->ThisMsg->MsgGUID, IO->Now, 0, eWrite, CCID, IO->ID);
 406         }
 407
 408         if (GetNextHashPos(RSSAggr->Messages,
 409                            RSSAggr->Pos,
 410                            &len, &Key,
 411                            (void**) &RSSAggr->ThisMsg))
 412                 return NextDBOperation(IO, RSS_FetchNetworkUsetableEntry);
 413         else
 414                 return eAbort;
 415 }
 416
 417 eNextState RSS_FetchNetworkUsetableEntry(AsyncIO *IO)
 418 {
 419         static const time_t antiExpire = USETABLE_ANTIEXPIRE_HIRES;
 420         time_t seenstamp = 0;
 421 #ifndef DEBUG_RSS
 422         const char *Key;
 423         long len;
 424         rss_aggregator *Ctx = (rss_aggregator *) IO->Data;
 425
 426         /* Find out if we've already seen this item */
 427 // todo: expiry?
 428         SetRSSState(IO, eRSSUT);
 429         seenstamp = CheckIfAlreadySeen("RSS Item Seen",
 430                                        Ctx->ThisMsg->MsgGUID,
 431                                        IO->Now,
 432                                        antiExpire,
 433                                        eCheckUpdate,
 434                                        CCID, IO->ID);
 435         if (seenstamp < antiExpire)
 436         {
 437                 /* Item has already been seen */
 438                 EVRSSC_syslog(LOG_DEBUG,
 439                               "%s has already been seen - %ld < %ld",
 440                               ChrPtr(Ctx->ThisMsg->MsgGUID),
 441                               seenstamp, antiExpire);
 442
 443                 SetRSSState(IO, eRSSParsing);
 444
 445                 if (GetNextHashPos(Ctx->Messages,
 446                                    Ctx->Pos,
 447                                    &len, &Key,
 448                                    (void**) &Ctx->ThisMsg))
 449                         return NextDBOperation(
 450                                 IO,
 451                                 RSS_FetchNetworkUsetableEntry);
 452                 else
 453                         return eAbort;
 454         }
 455         else
 456 #endif
 457         {
 458                 /* Item has already been seen */
 459                 EVRSSC_syslog(LOG_DEBUG,
 460                               "%s Parsing - %ld >= %ld",
 461                               ChrPtr(Ctx->ThisMsg->MsgGUID),
 462                               seenstamp, antiExpire);
 463                 SetRSSState(IO, eRSSParsing);
 464
 465                 NextDBOperation(IO, RSSSaveMessage);
 466                 return eSendMore;
 467         }
 468         return eSendMore;
 469 }
 470
 471 void UpdateLastKnownGood(pRSSConfig *pCfg, time_t now)
 472 {
 473         OneRoomNetCfg* pRNCfg;
 474         begin_critical_section(S_NETCONFIGS);
 475         pRNCfg = CtdlGetNetCfgForRoom (pCfg->QRnumber);
 476         if (pRNCfg != NULL)
 477         {
 478                 RSSCfgLine *RSSCfg = (RSSCfgLine *)pRNCfg->NetConfigs[rssclient];
 479
 480                 while (RSSCfg != NULL)
 481                 {
 482                         if (RSSCfg == pCfg->pCfg)
 483                                 break;
 484
 485                         RSSCfg = RSSCfg->next;
 486                 }
 487                 if (RSSCfg != NULL)
 488                 {
 489                         pRNCfg->changed = 1;
 490                         RSSCfg->last_known_good = now;
 491                 }
 492         }
 493
 494         end_critical_section(S_NETCONFIGS);
 495 }
 496
 497 eNextState RSSAggregator_AnalyseReply(AsyncIO *IO)
 498 {
 499         HashPos *it = NULL;
 500         long len;
 501         const char *Key;
 502         pRSSConfig *pCfg;
 503         u_char rawdigest[MD5_DIGEST_LEN];
 504         struct MD5Context md5context;
 505         StrBuf *guid;
 506         rss_aggregator *Ctx = (rss_aggregator *) IO->Data;
 507
 508         if (IO->HttpReq.httpcode != 200)
 509         {
 510                 StrBuf *ErrMsg;
 511                 long lens[2];
 512                 const char *strs[2];
 513
 514                 SetRSSState(IO, eRSSFailure);
 515                 ErrMsg = NewStrBuf();
 516                 EVRSSC_syslog(LOG_ALERT, "need a 200, got a %ld !\n",
 517                               IO->HttpReq.httpcode);
 518
 519                 strs[0] = ChrPtr(Ctx->Url);
 520                 lens[0] = StrLength(Ctx->Url);
 521
 522                 strs[1] = ChrPtr(Ctx->rooms);
 523                 lens[1] = StrLength(Ctx->rooms);
 524
 525                 if (IO->HttpReq.CurlError == NULL)
 526                         IO->HttpReq.CurlError = "";
 527
 528                 StrBufPrintf(ErrMsg,
 529                              "Error while RSS-Aggregation Run of %s\n"
 530                              " need a 200, got a %ld !\n"
 531                              " Curl Error message: \n%s / %s\n"
 532                              " Response text was: \n"
 533                              " \n %s\n",
 534                              ChrPtr(Ctx->Url),
 535                              IO->HttpReq.httpcode,
 536                              IO->HttpReq.errdesc,
 537                              IO->HttpReq.CurlError,
 538                              ChrPtr(IO->HttpReq.ReplyData)
 539                         );
 540
 541                 CtdlAideFPMessage(
 542                         ChrPtr(ErrMsg),
 543                         "RSS Aggregation run failure",
 544                         2, strs, (long*) &lens,
 545                         IO->Now,
 546                         IO->ID, CCID);
 547
 548                 FreeStrBuf(&ErrMsg);
 549                 EVRSSC_syslog(LOG_DEBUG,
 550                               "RSS feed returned an invalid http status code. <%s><HTTP %ld>\n",
 551                               ChrPtr(Ctx->Url),
 552                               IO->HttpReq.httpcode);
 553                 return eAbort;
 554         }
 555
 556         pCfg = &Ctx->Cfg;
 557
 558         while (pCfg != NULL)
 559         {
 560                 UpdateLastKnownGood (pCfg, IO->Now);
 561                 if ((Ctx->roomlist_parts > 1) &&
 562                     (it == NULL))
 563                 {
 564                         it = GetNewHashPos(RSSFetchUrls, 0);
 565                 }
 566                 if (it != NULL)
 567                 {
 568                         void *vptr;
 569                         if (GetNextHashPos(Ctx->OtherQRnumbers, it, &len, &Key, &vptr))
 570                                 pCfg = vptr;
 571                         else
 572                                 pCfg = NULL;
 573                 }
 574                 else
 575                         pCfg = NULL;
 576         }
 577         DeleteHashPos (&it);
 578
 579         SetRSSState(IO, eRSSUT);
 580
 581         MD5Init(&md5context);
 582
 583         MD5Update(&md5context,
 584                   (const unsigned char*)SKEY(IO->HttpReq.ReplyData));
 585
 586         MD5Update(&md5context,
 587                   (const unsigned char*)SKEY(Ctx->Url));
 588
 589         MD5Final(rawdigest, &md5context);
 590         guid = NewStrBufPlain(NULL,
 591                               MD5_DIGEST_LEN * 2 + 12 /* _rss2ctdl*/);
 592         StrBufHexEscAppend(guid, NULL, rawdigest, MD5_DIGEST_LEN);
 593         StrBufAppendBufPlain(guid, HKEY("_rssFM"), 0);
 594         if (StrLength(guid) > 40)
 595                 StrBufCutAt(guid, 40, NULL);
 596         /* Find out if we've already seen this item */
 597
 598 #ifndef DEBUG_RSS
 599
 600         if (CheckIfAlreadySeen("RSS Whole",
 601                                guid,
 602                                IO->Now,
 603                                IO->Now - USETABLE_ANTIEXPIRE,
 604                                eCheckUpdate,
 605                                CCID, IO->ID)
 606             != 0)
 607         {
 608                 FreeStrBuf(&guid);
 609
 610                 EVRSSC_syslog(LOG_DEBUG, "RSS feed already seen. <%s>\n", ChrPtr(Ctx->Url));
 611                 return eAbort;
 612         }
 613         FreeStrBuf(&guid);
 614 #endif
 615         SetRSSState(IO, eRSSParsing);
 616         return RSSAggregator_ParseReply(IO);
 617 }
 618
 619 eNextState RSSAggregator_FinishHttp(AsyncIO *IO)
 620 {
 621         return CurlQueueDBOperation(IO, RSSAggregator_AnalyseReply);
 622 }
 623
 624 /*
 625  * Begin a feed parse
 626  */
 627 int rss_do_fetching(rss_aggregator *RSSAggr)
 628 {
 629         AsyncIO         *IO = &RSSAggr->IO;
 630         rss_item *ri;
 631         time_t now;
 632
 633         now = time(NULL);
 634
 635         if ((RSSAggr->next_poll != 0) && (now < RSSAggr->next_poll))
 636                 return 0;
 637
 638         ri = (rss_item*) malloc(sizeof(rss_item));
 639         memset(ri, 0, sizeof(rss_item));
 640         RSSAggr->Item = ri;
 641
 642         if (! InitcURLIOStruct(&RSSAggr->IO,
 643                                RSSAggr,
 644                                "Citadel RSS Client",
 645                                RSSAggregator_FinishHttp,
 646                                RSSAggregator_Terminate,
 647                                RSSAggregator_TerminateDB,
 648                                RSSAggregator_ShutdownAbort))
 649         {
 650                 EVRSSCM_syslog(LOG_ALERT, "Unable to initialize libcurl.\n");
 651                 return 0;
 652         }
 653         SetRSSState(IO, eRSSCreated);
 654
 655         safestrncpy(((CitContext*)RSSAggr->IO.CitContext)->cs_host,
 656                     ChrPtr(RSSAggr->Url),
 657                     sizeof(((CitContext*)RSSAggr->IO.CitContext)->cs_host));
 658
 659         EVRSSC_syslog(LOG_DEBUG, "Fetching RSS feed <%s>\n", ChrPtr(RSSAggr->Url));
 660         ParseURL(&RSSAggr->IO.ConnectMe, RSSAggr->Url, 80);
 661         CurlPrepareURL(RSSAggr->IO.ConnectMe);
 662
 663         SetRSSState(IO, eRSSFetching);
 664         QueueCurlContext(&RSSAggr->IO);
 665         return 1;
 666 }
 667
 668 /*
 669  * Scan a room's netconfig to determine whether it is requesting any RSS feeds
 670  */
 671 void rssclient_scan_room(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCFG)
 672 {
 673         const RSSCfgLine *RSSCfg = (RSSCfgLine *)OneRNCFG->NetConfigs[rssclient];
 674         rss_aggregator *RSSAggr = NULL;
 675         rss_aggregator *use_this_RSSAggr = NULL;
 676         void *vptr;
 677
 678         pthread_mutex_lock(&RSSQueueMutex);
 679         if (GetHash(RSSQueueRooms, LKEY(qrbuf->QRnumber), &vptr))
 680         {
 681                 EVRSSQ_syslog(LOG_DEBUG,
 682                               "rssclient: [%ld] %s already in progress.\n",
 683                               qrbuf->QRnumber,
 684                               qrbuf->QRname);
 685                 pthread_mutex_unlock(&RSSQueueMutex);
 686                 return;
 687         }
 688         pthread_mutex_unlock(&RSSQueueMutex);
 689
 690         if (server_shutting_down) return;
 691
 692         while (RSSCfg != NULL)
 693         {
 694                 pthread_mutex_lock(&RSSQueueMutex);
 695                 GetHash(RSSFetchUrls,
 696                         SKEY(RSSCfg->Url),
 697                         &vptr);
 698
 699                 use_this_RSSAggr = (rss_aggregator *)vptr;
 700                 if (use_this_RSSAggr != NULL)
 701                 {
 702                         pRSSConfig *pRSSCfg;
 703
 704                         StrBufAppendBufPlain(
 705                                 use_this_RSSAggr->rooms,
 706                                 qrbuf->QRname,
 707                                 -1, 0);
 708                         if (use_this_RSSAggr->roomlist_parts==1)
 709                         {
 710                                 use_this_RSSAggr->OtherQRnumbers
 711                                         = NewHash(1, lFlathash);
 712                         }
 713
 714                         pRSSCfg = (pRSSConfig *) malloc(sizeof(pRSSConfig));
 715
 716                         pRSSCfg->QRnumber = qrbuf->QRnumber;
 717                         pRSSCfg->pCfg = RSSCfg;
 718
 719                         Put(use_this_RSSAggr->OtherQRnumbers,
 720                             LKEY(qrbuf->QRnumber),
 721                             pRSSCfg,
 722                             NULL);
 723                         use_this_RSSAggr->roomlist_parts++;
 724
 725                         pthread_mutex_unlock(&RSSQueueMutex);
 726
 727                         RSSCfg = RSSCfg->next;
 728                         continue;
 729                 }
 730                 pthread_mutex_unlock(&RSSQueueMutex);
 731
 732                 RSSAggr = (rss_aggregator *) malloc(
 733                         sizeof(rss_aggregator));
 734
 735                 memset (RSSAggr, 0, sizeof(rss_aggregator));
 736                 RSSAggr->Cfg.QRnumber = qrbuf->QRnumber;
 737                 RSSAggr->Cfg.pCfg = RSSCfg;
 738                 RSSAggr->roomlist_parts = 1;
 739                 RSSAggr->Url = NewStrBufDup(RSSCfg->Url);
 740
 741                 RSSAggr->ItemType = RSS_UNSET;
 742
 743                 RSSAggr->rooms = NewStrBufPlain(
 744                         qrbuf->QRname, -1);
 745
 746                 pthread_mutex_lock(&RSSQueueMutex);
 747
 748                 Put(RSSFetchUrls,
 749                     SKEY(RSSAggr->Url),
 750                     RSSAggr,
 751                     DeleteRssCfg);
 752
 753                 pthread_mutex_unlock(&RSSQueueMutex);
 754                 RSSCfg = RSSCfg->next;
 755         }
 756 }
 757
 758 /*
 759  * Scan for rooms that have RSS client requests configured
 760  */
 761 void rssclient_scan(void) {
 762         int RSSRoomCount, RSSCount;
 763         rss_aggregator *rptr = NULL;
 764         void *vrptr = NULL;
 765         HashPos *it;
 766         long len;
 767         const char *Key;
 768         time_t now = time(NULL);
 769
 770         /* Run no more than once every 15 minutes. */
 771         if ((now - last_run) < 900) {
 772                 EVRSSQ_syslog(LOG_DEBUG,
 773                               "Client: polling interval not yet reached; last run was %ldm%lds ago",
 774                               ((now - last_run) / 60),
 775                               ((now - last_run) % 60)
 776                 );
 777                 return;
 778         }
 779
 780         /*
 781          * This is a simple concurrency check to make sure only one rssclient
 782          * run is done at a time.
 783          */
 784         pthread_mutex_lock(&RSSQueueMutex);
 785         RSSCount = GetCount(RSSFetchUrls);
 786         RSSRoomCount = GetCount(RSSQueueRooms);
 787         pthread_mutex_unlock(&RSSQueueMutex);
 788
 789         if ((RSSRoomCount > 0) || (RSSCount > 0)) {
 790                 EVRSSQ_syslog(LOG_DEBUG,
 791                               "rssclient: concurrency check failed; %d rooms and %d url's are queued",
 792                               RSSRoomCount, RSSCount
 793                         );
 794                 return;
 795         }
 796
 797         become_session(&rss_CC);
 798         EVRSSQM_syslog(LOG_DEBUG, "rssclient started");
 799         CtdlForEachNetCfgRoom(rssclient_scan_room, NULL, rssclient);
 800
 801         if (GetCount(RSSFetchUrls) > 0)
 802         {
 803                 pthread_mutex_lock(&RSSQueueMutex);
 804                 EVRSSQ_syslog(LOG_DEBUG,
 805                                "rssclient starting %d Clients",
 806                                GetCount(RSSFetchUrls));
 807
 808                 it = GetNewHashPos(RSSFetchUrls, 0);
 809                 while (!server_shutting_down &&
 810                        GetNextHashPos(RSSFetchUrls, it, &len, &Key, &vrptr) &&
 811                        (vrptr != NULL)) {
 812                         rptr = (rss_aggregator *)vrptr;
 813                         if (!rss_do_fetching(rptr))
 814                                 UnlinkRSSAggregator(rptr);
 815                 }
 816                 DeleteHashPos(&it);
 817                 pthread_mutex_unlock(&RSSQueueMutex);
 818         }
 819         else
 820                 EVRSSQM_syslog(LOG_DEBUG, "Nothing to do.");
 821
 822         EVRSSQM_syslog(LOG_DEBUG, "rssclient ended\n");
 823         return;
 824 }
 825
 826 void rss_cleanup(void)
 827 {
 828         /* citthread_mutex_destroy(&RSSQueueMutex); TODO */
 829         DeleteHash(&RSSFetchUrls);
 830         DeleteHash(&RSSQueueRooms);
 831 }
 832
 833 void LogDebugEnableRSSClient(const int n)
 834 {
 835         RSSClientDebugEnabled = n;
 836 }
 837
 838
 839 typedef struct __RSSVetoInfo {
 840         StrBuf *ErrMsg;
 841         time_t Now;
 842         int Veto;
 843 }RSSVetoInfo;
 844
 845 void rssclient_veto_scan_room(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCFG)
 846 {
 847         RSSVetoInfo *Info = (RSSVetoInfo *) data;
 848         const RSSCfgLine *RSSCfg = (RSSCfgLine *)OneRNCFG->NetConfigs[rssclient];
 849
 850         while (RSSCfg != NULL)
 851         {
 852                 if ((RSSCfg->last_known_good != 0) &&
 853                     (RSSCfg->last_known_good + USETABLE_ANTIEXPIRE < Info->Now))
 854                 {
 855                         StrBufAppendPrintf(Info->ErrMsg,
 856                                            "RSS feed not seen for a %d days:: <",
 857                                            (Info->Now - RSSCfg->last_known_good) / (24 * 60 * 60));
 858
 859                         StrBufAppendBuf(Info->ErrMsg, RSSCfg->Url, 0);
 860                         StrBufAppendBufPlain(Info->ErrMsg, HKEY(">\n"), 0);
 861                 }
 862                 RSSCfg = RSSCfg->next;
 863         }
 864 }
 865
 866 int RSSCheckUsetableVeto(StrBuf *ErrMsg)
 867 {
 868         RSSVetoInfo Info;
 869
 870         Info.ErrMsg = ErrMsg;
 871         Info.Now = time (NULL);
 872         Info.Veto = 0;
 873
 874         CtdlForEachNetCfgRoom(rssclient_veto_scan_room, &Info, rssclient);
 875
 876         return Info.Veto;;
 877 }
 878
 879
 880
 881
 882 void ParseRSSClientCfgLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 883 {
 884         RSSCfgLine *RSSCfg;
 885
 886         RSSCfg = (RSSCfgLine *) malloc (sizeof(RSSCfgLine));
 887         RSSCfg->Url = NewStrBufPlain (NULL, StrLength (Line));
 888
 889
 890         StrBufExtract_NextToken(RSSCfg->Url, Line, &LinePos, '|');
 891         RSSCfg->last_known_good = StrBufExtractNext_long(Line, &LinePos, '|');
 892
 893
 894         RSSCfg->next = (RSSCfgLine *)OneRNCFG->NetConfigs[ThisOne->C];
 895         OneRNCFG->NetConfigs[ThisOne->C] = (RoomNetCfgLine*) RSSCfg;
 896 }
 897
 898 void SerializeRSSClientCfgLine(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *RNCfg, RoomNetCfgLine *data)
 899 {
 900         RSSCfgLine *RSSCfg = (RSSCfgLine*) data;
 901
 902         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 903         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 904         StrBufAppendBufPlain(OutputBuffer, SKEY(RSSCfg->Url), 0);
 905         StrBufAppendPrintf(OutputBuffer, "|%ld\n", RSSCfg->last_known_good);
 906 }
 907
 908 void DeleteRSSClientCfgLine(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 909 {
 910         RSSCfgLine *RSSCfg = (RSSCfgLine*) *data;
 911
 912         FreeStrBuf(&RSSCfg->Url);
 913         free(*data);
 914         *data = NULL;
 915 }
 916
 917
 918 CTDL_MODULE_INIT(rssclient)
 919 {
 920         if (!threading)
 921         {
 922                 CtdlRegisterTDAPVetoHook (RSSCheckUsetableVeto, CDB_USETABLE, 0);
 923
 924                 CtdlREGISTERRoomCfgType(rssclient, ParseRSSClientCfgLine, 0, 1, SerializeRSSClientCfgLine, DeleteRSSClientCfgLine);
 925                 pthread_mutex_init(&RSSQueueMutex, NULL);
 926                 RSSQueueRooms = NewHash(1, lFlathash);
 927                 RSSFetchUrls = NewHash(1, NULL);
 928                 syslog(LOG_INFO, "%s\n", curl_version());
 929                 CtdlRegisterSessionHook(rssclient_scan, EVT_TIMER, PRIO_AGGR + 300);
 930                 CtdlRegisterEVCleanupHook(rss_cleanup);
 931                 CtdlRegisterDebugFlagHook(HKEY("rssclient"), LogDebugEnableRSSClient, &RSSClientDebugEnabled);
 932         }
 933         else
 934         {
 935                 CtdlFillSystemContext(&rss_CC, "rssclient");
 936         }
 937         return "rssclient";
 938 }