citadel/modules/rssclient/rss_atom_parser.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  *
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  *
  17  *
  18  *
  19  */
  20
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <stdio.h>
  24
  25 #if TIME_WITH_SYS_TIME
  26 # include <sys/time.h>
  27 # include <time.h>
  28 #else
  29 # if HAVE_SYS_TIME_H
  30 #  include <sys/time.h>
  31 # else
  32 #  include <time.h>
  33 # endif
  34 #endif
  35
  36 #include <ctype.h>
  37 #include <string.h>
  38 #include <errno.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <expat.h>
  42 #include <curl/curl.h>
  43 #include <libcitadel.h>
  44 #include "citadel.h"
  45 #include "server.h"
  46 #include "citserver.h"
  47 #include "support.h"
  48 #include "config.h"
  49 #include "threads.h"
  50 #include "ctdl_module.h"
  51 #include "clientsocket.h"
  52 #include "msgbase.h"
  53 #include "parsedate.h"
  54 #include "database.h"
  55 #include "citadel_dirs.h"
  56 #include "md5.h"
  57 #include "context.h"
  58 #include "event_client.h"
  59 #include "rss_atom_parser.h"
  60
  61 void rss_remember_item(rss_item *ri, rss_aggregator *Cfg);
  62
  63 int RSSAtomParserDebugEnabled = 0;
  64
  65 #define N ((rss_aggregator*)IO->Data)->QRnumber
  66
  67 #define DBGLOG(LEVEL) if ((LEVEL != LOG_DEBUG) || (RSSAtomParserDebugEnabled != 0))
  68
  69 #define EVRSSATOM_syslog(LEVEL, FORMAT, ...)                            \
  70         DBGLOG(LEVEL) syslog(LEVEL,                                     \
  71                              "IO[%ld]CC[%d][%ld]RSSP" FORMAT,           \
  72                              IO->ID, CCID, N, __VA_ARGS__)
  73
  74 #define EVRSSATOMM_syslog(LEVEL, FORMAT)                                \
  75         DBGLOG(LEVEL) syslog(LEVEL,                                     \
  76                              "IO[%ld]CC[%d][%ld]RSSP" FORMAT,           \
  77                              IO->ID, CCID, N)
  78
  79 #define EVRSSATOMCS_syslog(LEVEL, FORMAT, ...)                  \
  80         DBGLOG(LEVEL) syslog(LEVEL, "IO[%ld][%ld]RSSP" FORMAT,  \
  81                              IO->ID, N, __VA_ARGS__)
  82
  83 #define EVRSSATOMSM_syslog(LEVEL, FORMAT)                       \
  84         DBGLOG(LEVEL) syslog(LEVEL, "IO[%ld][%ld]RSSP" FORMAT,  \
  85                              IO->ID, N)
  86
  87 /*
  88  * Convert an RDF/RSS datestamp into a time_t
  89  */
  90 time_t rdf_parsedate(const char *p)
  91 {
  92         struct tm tm;
  93         time_t t = 0;
  94
  95         if (!p) return 0L;
  96         if (strlen(p) < 10) return 0L;
  97
  98         memset(&tm, 0, sizeof tm);
  99
 100         /*
 101          * If the timestamp appears to be in W3C datetime format, try to
 102          * parse it.  See also: http://www.w3.org/TR/NOTE-datetime
 103          *
 104          * This code, along with parsedate.c, is a potential candidate for
 105          * moving into libcitadel.
 106          */
 107         if ( (p[4] == '-') && (p[7] == '-') ) {
 108                 tm.tm_year = atoi(&p[0]) - 1900;
 109                 tm.tm_mon = atoi(&p[5]) - 1;
 110                 tm.tm_mday = atoi(&p[8]);
 111                 if ( (p[10] == 'T') && (p[13] == ':') ) {
 112                         tm.tm_hour = atoi(&p[11]);
 113                         tm.tm_min = atoi(&p[14]);
 114                 }
 115                 return mktime(&tm);
 116         }
 117
 118         /* hmm... try RFC822 date stamp format */
 119
 120         t = parsedate(p);
 121         if (t > 0) return(t);
 122
 123         /* yeesh.  ok, just return the current date and time. */
 124         return(time(NULL));
 125 }
 126
 127 void flush_rss_item(rss_item *ri)
 128 {
 129         /* Initialize the feed item data structure */
 130         FreeStrBuf(&ri->guid);
 131         FreeStrBuf(&ri->title);
 132         FreeStrBuf(&ri->link);
 133         FreeStrBuf(&ri->author_or_creator);
 134         FreeStrBuf(&ri->author_email);
 135         FreeStrBuf(&ri->author_url);
 136         FreeStrBuf(&ri->description);
 137
 138         FreeStrBuf(&ri->linkTitle);
 139         FreeStrBuf(&ri->reLink);
 140         FreeStrBuf(&ri->reLinkTitle);
 141         FreeStrBuf(&ri->channel_title);
 142 }
 143
 144
 145 /******************************************************************************
 146  *                              XML-Handler                                   *
 147  ******************************************************************************/
 148
 149
 150 void RSS_item_rss_start (StrBuf *CData,
 151                          rss_item *ri,
 152                          rss_aggregator *RSSAggr,
 153                          const char** Attr)
 154 {
 155         AsyncIO         *IO = &RSSAggr->IO;
 156         EVRSSATOMM_syslog(LOG_DEBUG, "RSS: This is an RSS feed.\n");
 157         RSSAggr->ItemType = RSS_RSS;
 158 }
 159
 160 void RSS_item_rdf_start(StrBuf *CData,
 161                         rss_item *ri,
 162                         rss_aggregator *RSSAggr,
 163                         const char** Attr)
 164 {
 165         AsyncIO         *IO = &RSSAggr->IO;
 166         EVRSSATOMM_syslog(LOG_DEBUG, "RSS: This is an RDF feed.\n");
 167         RSSAggr->ItemType = RSS_RSS;
 168 }
 169
 170 void ATOM_item_feed_start(StrBuf *CData,
 171                           rss_item *ri,
 172                           rss_aggregator *RSSAggr,
 173                           const char** Attr)
 174 {
 175         AsyncIO         *IO = &RSSAggr->IO;
 176         EVRSSATOMM_syslog(LOG_DEBUG, "RSS: This is an ATOM feed.\n");
 177         RSSAggr->ItemType = RSS_ATOM;
 178 }
 179
 180
 181 void RSS_item_item_start(StrBuf *CData,
 182                          rss_item *ri,
 183                          rss_aggregator *RSSAggr,
 184                          const char** Attr)
 185 {
 186         ri->item_tag_nesting ++;
 187         flush_rss_item(ri);
 188 }
 189
 190 void ATOM_item_entry_start(StrBuf *CData,
 191                            rss_item *ri,
 192                            rss_aggregator *RSSAggr,
 193                            const char** Attr)
 194 {
 195 /* Atom feed... */
 196         ri->item_tag_nesting ++;
 197         flush_rss_item(ri);
 198 }
 199
 200 void ATOM_item_link_start (StrBuf *CData,
 201                            rss_item *ri,
 202                            rss_aggregator *RSSAggr,
 203                            const char** Attr)
 204 {
 205         int i;
 206         const char *pHref = NULL;
 207         const char *pType = NULL;
 208         const char *pRel = NULL;
 209         const char *pTitle = NULL;
 210
 211         for (i = 0; Attr[i] != NULL; i+=2)
 212         {
 213                 if (!strcmp(Attr[i], "href"))
 214                 {
 215                         pHref = Attr[i+1];
 216                 }
 217                 else if (!strcmp(Attr[i], "rel"))
 218                 {
 219                         pRel = Attr[i+1];
 220                 }
 221                 else if (!strcmp(Attr[i], "type"))
 222                 {
 223                         pType = Attr[i+1];
 224                 }
 225                 else if (!strcmp(Attr[i], "title"))
 226                 {
 227                         pTitle = Attr[i+1];
 228                 }
 229         }
 230         if (pHref == NULL)
 231                 return; /* WHUT? Pointing... where? */
 232         if ((pType != NULL) && !strcasecmp(pType, "application/atom+xml"))
 233                 return;
 234         /* these just point to other rss resources,
 235            we're not interested in them. */
 236         if (pRel != NULL)
 237         {
 238                 if (!strcasecmp (pRel, "replies"))
 239                 {
 240                         NewStrBufDupAppendFlush(&ri->reLink, NULL, pHref, -1);
 241                         StrBufTrim(ri->link);
 242                         NewStrBufDupAppendFlush(&ri->reLinkTitle,
 243                                                 NULL,
 244                                                 pTitle,
 245                                                 -1);
 246                 }
 247                 else if (!strcasecmp(pRel, "alternate"))
 248                 { /* Alternative representation of this Item... */
 249                         NewStrBufDupAppendFlush(&ri->link, NULL, pHref, -1);
 250                         StrBufTrim(ri->link);
 251                         NewStrBufDupAppendFlush(&ri->linkTitle,
 252                                                 NULL,
 253                                                 pTitle,
 254                                                 -1);
 255
 256                 }
 257 #if 0 /* these are also defined, but dunno what to do with them.. */
 258                 else if (!strcasecmp(pRel, "related"))
 259                 {
 260                 }
 261                 else if (!strcasecmp(pRel, "self"))
 262                 {
 263                 }
 264                 else if (!strcasecmp(pRel, "enclosure"))
 265                 {/*...reference can get big, and is probably the full article*/
 266                 }
 267                 else if (!strcasecmp(pRel, "via"))
 268                 {/* this article was provided via... */
 269                 }
 270 #endif
 271         }
 272         else if (StrLength(ri->link) == 0)
 273         {
 274                 NewStrBufDupAppendFlush(&ri->link, NULL, pHref, -1);
 275                 StrBufTrim(ri->link);
 276                 NewStrBufDupAppendFlush(&ri->linkTitle, NULL, pTitle, -1);
 277         }
 278 }
 279
 280
 281
 282
 283 void ATOMRSS_item_title_end(StrBuf *CData,
 284                             rss_item *ri,
 285                             rss_aggregator *RSSAggr,
 286                             const char** Attr)
 287 {
 288         if ((ri->item_tag_nesting == 0) && (StrLength(CData) > 0)) {
 289                 NewStrBufDupAppendFlush(&ri->channel_title, CData, NULL, 0);
 290                 StrBufTrim(ri->channel_title);
 291         }
 292 }
 293
 294 void RSS_item_guid_end(StrBuf *CData,
 295                        rss_item *ri,
 296                        rss_aggregator *RSSAggr,
 297                        const char** Attr)
 298 {
 299         if (StrLength(CData) > 0) {
 300                 NewStrBufDupAppendFlush(&ri->guid, CData, NULL, 0);
 301         }
 302 }
 303
 304 void ATOM_item_id_end(StrBuf *CData,
 305                       rss_item *ri, rss_aggregator *RSSAggr, const char** Attr)
 306 {
 307         if (StrLength(CData) > 0) {
 308                 NewStrBufDupAppendFlush(&ri->guid, CData, NULL, 0);
 309         }
 310 }
 311
 312
 313 void RSS_item_link_end (StrBuf *CData,
 314                         rss_item *ri,
 315                         rss_aggregator *RSSAggr,
 316                         const char** Attr)
 317 {
 318         if (StrLength(CData) > 0) {
 319                 NewStrBufDupAppendFlush(&ri->link, CData, NULL, 0);
 320                 StrBufTrim(ri->link);
 321         }
 322 }
 323 void RSS_item_relink_end(StrBuf *CData,
 324                          rss_item *ri,
 325                          rss_aggregator *RSSAggr,
 326                          const char** Attr)
 327 {
 328         if (StrLength(CData) > 0) {
 329                 NewStrBufDupAppendFlush(&ri->reLink, CData, NULL, 0);
 330                 StrBufTrim(ri->reLink);
 331         }
 332 }
 333
 334 void RSSATOM_item_title_end (StrBuf *CData,
 335                              rss_item *ri,
 336                              rss_aggregator *RSSAggr,
 337                              const char** Attr)
 338 {
 339         if (StrLength(CData) > 0) {
 340                 NewStrBufDupAppendFlush(&ri->title, CData, NULL, 0);
 341                 StrBufTrim(ri->title);
 342         }
 343 }
 344
 345 void ATOM_item_content_end (StrBuf *CData,
 346                             rss_item *ri,
 347                             rss_aggregator *RSSAggr,
 348                             const char** Attr)
 349 {
 350         long olen = StrLength (ri->description);
 351         long clen = StrLength (CData);
 352         if (clen > 0)
 353         {
 354                 if (olen == 0) {
 355                         NewStrBufDupAppendFlush(&ri->description,
 356                                                 CData,
 357                                                 NULL,
 358                                                 0);
 359                         StrBufTrim(ri->description);
 360                 }
 361                 else if (olen < clen) {
 362                         FlushStrBuf(ri->description);
 363                         NewStrBufDupAppendFlush(&ri->description,
 364                                                 CData,
 365                                                 NULL,
 366                                                 0);
 367
 368                         StrBufTrim(ri->description);
 369                 }
 370         }
 371 }
 372 void ATOM_item_summary_end (StrBuf *CData,
 373                             rss_item *ri,
 374                             rss_aggregator *RSSAggr,
 375                             const char** Attr)
 376 {
 377         /*
 378          * this can contain an abstract of the article.
 379          * but we don't want to verwrite a full document if we already have it.
 380          */
 381         if ((StrLength(CData) > 0) && (StrLength(ri->description) == 0))
 382         {
 383                 NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
 384                 StrBufTrim(ri->description);
 385         }
 386 }
 387
 388 void RSS_item_description_end (StrBuf *CData,
 389                                rss_item *ri,
 390                                rss_aggregator *RSSAggr,
 391                                const char** Attr)
 392 {
 393         long olen = StrLength (ri->description);
 394         long clen = StrLength (CData);
 395         if (clen > 0)
 396         {
 397                 if (olen == 0) {
 398                         NewStrBufDupAppendFlush(&ri->description,
 399                                                 CData,
 400                                                 NULL,
 401                                                 0);
 402                         StrBufTrim(ri->description);
 403                 }
 404                 else if (olen < clen) {
 405                         FlushStrBuf(ri->description);
 406                         NewStrBufDupAppendFlush(&ri->description,
 407                                                 CData,
 408                                                 NULL,
 409                                                 0);
 410                         StrBufTrim(ri->description);
 411                 }
 412         }
 413 }
 414
 415 void ATOM_item_published_end (StrBuf *CData,
 416                               rss_item *ri,
 417                               rss_aggregator *RSSAggr,
 418                               const char** Attr)
 419 {
 420         if (StrLength(CData) > 0) {
 421                 StrBufTrim(CData);
 422                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 423         }
 424 }
 425
 426 void ATOM_item_updated_end (StrBuf *CData,
 427                             rss_item *ri,
 428                             rss_aggregator *RSSAggr,
 429                             const char** Attr)
 430 {
 431         if (StrLength(CData) > 0) {
 432                 StrBufTrim(CData);
 433                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 434         }
 435 }
 436
 437 void RSS_item_pubdate_end (StrBuf *CData,
 438                            rss_item *ri,
 439                            rss_aggregator *RSSAggr,
 440                            const char** Attr)
 441 {
 442         if (StrLength(CData) > 0) {
 443                 StrBufTrim(CData);
 444                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 445         }
 446 }
 447
 448
 449 void RSS_item_date_end (StrBuf *CData,
 450                         rss_item *ri,
 451                         rss_aggregator *RSSAggr,
 452                         const char** Attr)
 453 {
 454         if (StrLength(CData) > 0) {
 455                 StrBufTrim(CData);
 456                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 457         }
 458 }
 459
 460
 461
 462 void RSS_item_author_end(StrBuf *CData,
 463                          rss_item *ri,
 464                          rss_aggregator *RSSAggr,
 465                          const char** Attr)
 466 {
 467         if (StrLength(CData) > 0) {
 468                 NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
 469                 StrBufTrim(ri->author_or_creator);
 470         }
 471 }
 472
 473
 474 void ATOM_item_name_end(StrBuf *CData,
 475                         rss_item *ri,
 476                         rss_aggregator *RSSAggr,
 477                         const char** Attr)
 478 {
 479         if (StrLength(CData) > 0) {
 480                 NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
 481                 StrBufTrim(ri->author_or_creator);
 482         }
 483 }
 484
 485 void ATOM_item_email_end(StrBuf *CData,
 486                          rss_item *ri,
 487                          rss_aggregator *RSSAggr,
 488                          const char** Attr)
 489 {
 490         if (StrLength(CData) > 0) {
 491                 NewStrBufDupAppendFlush(&ri->author_email, CData, NULL, 0);
 492                 StrBufTrim(ri->author_email);
 493         }
 494 }
 495
 496 void RSS_item_creator_end(StrBuf *CData,
 497                           rss_item *ri,
 498                           rss_aggregator *RSSAggr,
 499                           const char** Attr)
 500 {
 501         if ((StrLength(CData) > 0) &&
 502             (StrLength(ri->author_or_creator) == 0))
 503         {
 504                 NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
 505                 StrBufTrim(ri->author_or_creator);
 506         }
 507 }
 508
 509
 510 void ATOM_item_uri_end(StrBuf *CData,
 511                        rss_item *ri,
 512                        rss_aggregator *RSSAggr,
 513                        const char** Attr)
 514 {
 515         if (StrLength(CData) > 0) {
 516                 NewStrBufDupAppendFlush(&ri->author_url, CData, NULL, 0);
 517                 StrBufTrim(ri->author_url);
 518         }
 519 }
 520
 521 void RSS_item_item_end(StrBuf *CData,
 522                        rss_item *ri,
 523                        rss_aggregator *RSSAggr,
 524                        const char** Attr)
 525 {
 526         --ri->item_tag_nesting;
 527         rss_remember_item(ri, RSSAggr);
 528 }
 529
 530
 531 void ATOM_item_entry_end(StrBuf *CData,
 532                          rss_item *ri,
 533                          rss_aggregator *RSSAggr,
 534                          const char** Attr)
 535 {
 536         --ri->item_tag_nesting;
 537         rss_remember_item(ri, RSSAggr);
 538 }
 539
 540 void RSS_item_rss_end(StrBuf *CData,
 541                       rss_item *ri,
 542                       rss_aggregator *RSSAggr,
 543                       const char** Attr)
 544 {
 545         AsyncIO         *IO = &RSSAggr->IO;
 546         EVRSSATOMM_syslog(LOG_DEBUG, "End of feed detected.  Closing parser.\n");
 547         ri->done_parsing = 1;
 548 }
 549
 550 void RSS_item_rdf_end(StrBuf *CData,
 551                       rss_item *ri,
 552                       rss_aggregator *RSSAggr,
 553                       const char** Attr)
 554 {
 555         AsyncIO         *IO = &RSSAggr->IO;
 556         EVRSSATOMM_syslog(LOG_DEBUG, "End of feed detected.  Closing parser.\n");
 557         ri->done_parsing = 1;
 558 }
 559
 560
 561 void RSSATOM_item_ignore(StrBuf *CData,
 562                          rss_item *ri,
 563                          rss_aggregator *RSSAggr,
 564                          const char** Attr)
 565 {
 566 }
 567
 568
 569
 570 /*
 571  * This callback stores up the data which appears in between tags.
 572  */
 573 void rss_xml_cdata_start(void *data)
 574 {
 575         rss_aggregator *RSSAggr = (rss_aggregator*) data;
 576
 577         FlushStrBuf(RSSAggr->CData);
 578 }
 579
 580 void rss_xml_cdata_end(void *data)
 581 {
 582 }
 583 void rss_xml_chardata(void *data, const XML_Char *s, int len)
 584 {
 585         rss_aggregator *RSSAggr = (rss_aggregator*) data;
 586
 587         StrBufAppendBufPlain (RSSAggr->CData, s, len, 0);
 588 }
 589
 590
 591 /******************************************************************************
 592  *                            RSS parser logic                                *
 593  ******************************************************************************/
 594
 595 extern pthread_mutex_t RSSQueueMutex;
 596
 597 HashList *StartHandlers = NULL;
 598 HashList *EndHandlers = NULL;
 599 HashList *KnownNameSpaces = NULL;
 600
 601 void FreeNetworkSaveMessage (void *vMsg)
 602 {
 603         networker_save_message *Msg = (networker_save_message *) vMsg;
 604
 605         CtdlFreeMessageContents(&Msg->Msg);
 606         FreeStrBuf(&Msg->Message);
 607         FreeStrBuf(&Msg->MsgGUID);
 608
 609         FreeStrBuf(&Msg->author_email);
 610         FreeStrBuf(&Msg->author_or_creator);
 611         FreeStrBuf(&Msg->title);
 612         FreeStrBuf(&Msg->description);
 613
 614         FreeStrBuf(&Msg->link);
 615         FreeStrBuf(&Msg->linkTitle);
 616
 617         FreeStrBuf(&Msg->reLink);
 618         FreeStrBuf(&Msg->reLinkTitle);
 619
 620         free(Msg);
 621 }
 622
 623
 624 /*
 625  * Commit a fetched and parsed RSS item to disk
 626  */
 627 void rss_remember_item(rss_item *ri, rss_aggregator *RSSAggr)
 628 {
 629         networker_save_message *SaveMsg;
 630         struct MD5Context md5context;
 631         u_char rawdigest[MD5_DIGEST_LEN];
 632         StrBuf *guid;
 633         AsyncIO *IO = &RSSAggr->IO;
 634         int n;
 635
 636
 637         SaveMsg = (networker_save_message *) malloc(
 638                 sizeof(networker_save_message));
 639         memset(SaveMsg, 0, sizeof(networker_save_message));
 640
 641         /* Construct a GUID to use in the S_USETABLE table.
 642          * If one is not present in the item itself, make one up.
 643          */
 644         if (ri->guid != NULL) {
 645                 StrBufSpaceToBlank(ri->guid);
 646                 StrBufTrim(ri->guid);
 647                 guid = NewStrBufPlain(HKEY("rss/"));
 648                 StrBufAppendBuf(guid, ri->guid, 0);
 649         }
 650         else {
 651                 MD5Init(&md5context);
 652                 if (ri->title != NULL) {
 653                         MD5Update(&md5context,
 654                                   (const unsigned char*)SKEY(ri->title));
 655                 }
 656                 if (ri->link != NULL) {
 657                         MD5Update(&md5context,
 658                                   (const unsigned char*)SKEY(ri->link));
 659                 }
 660                 MD5Final(rawdigest, &md5context);
 661                 guid = NewStrBufPlain(NULL,
 662                                       MD5_DIGEST_LEN * 2 + 12 /* _rss2ctdl*/);
 663                 StrBufHexEscAppend(guid, NULL, rawdigest, MD5_DIGEST_LEN);
 664                 StrBufAppendBufPlain(guid, HKEY("_rss2ctdl"), 0);
 665         }
 666
 667         /* translate Item into message. */
 668         EVRSSATOMM_syslog(LOG_DEBUG, "RSS: translating item...\n");
 669         if (ri->description == NULL) ri->description = NewStrBufPlain(HKEY(""));
 670         StrBufSpaceToBlank(ri->description);
 671         SaveMsg->Msg.cm_magic = CTDLMESSAGE_MAGIC;
 672         SaveMsg->Msg.cm_anon_type = MES_NORMAL;
 673         SaveMsg->Msg.cm_format_type = FMT_RFC822;
 674
 675         /* gather the cheaply computed information now... */
 676
 677         if (ri->guid != NULL) {
 678                 SaveMsg->Msg.cm_fields['E'] = strdup(ChrPtr(ri->guid));
 679         }
 680
 681         SaveMsg->MsgGUID = guid;
 682
 683         if (ri->pubdate <= 0) {
 684                 ri->pubdate = time(NULL); /// TODO: use event time!
 685         }
 686         SaveMsg->Msg.cm_fields['T'] = malloc(64);
 687         snprintf(SaveMsg->Msg.cm_fields['T'], 64, "%ld", ri->pubdate);
 688         if (ri->channel_title != NULL) {
 689                 if (StrLength(ri->channel_title) > 0) {
 690                         SaveMsg->Msg.cm_fields['O'] =
 691                                 strdup(ChrPtr(ri->channel_title));
 692                 }
 693         }
 694
 695         /* remember the ones for defferred processing to save computing power after we know if we realy need it. */
 696
 697         SaveMsg->author_or_creator = ri->author_or_creator;
 698         ri->author_or_creator = NULL;
 699
 700         SaveMsg->author_email = ri->author_email;
 701         ri->author_email = NULL;
 702
 703         SaveMsg->title = ri->title;
 704         ri->title = NULL;
 705
 706         SaveMsg->link = ri->link;
 707         ri->link = NULL;
 708
 709         SaveMsg->description = ri->description;
 710         ri->description = NULL;
 711
 712         SaveMsg->linkTitle = ri->linkTitle;
 713         ri->linkTitle = NULL;
 714
 715         SaveMsg->reLink = ri->reLink;
 716         ri->reLink = NULL;
 717
 718         SaveMsg->reLinkTitle = ri->reLinkTitle;
 719         ri->reLinkTitle = NULL;
 720
 721         n = GetCount(RSSAggr->Messages) + 1;
 722         Put(RSSAggr->Messages, IKEY(n), SaveMsg, FreeNetworkSaveMessage);
 723 }
 724
 725
 726
 727 void rss_xml_start(void *data, const char *supplied_el, const char **attr)
 728 {
 729         rss_xml_handler *h;
 730         rss_aggregator  *RSSAggr = (rss_aggregator*) data;
 731         AsyncIO         *IO = &RSSAggr->IO;
 732         rss_item        *ri = RSSAggr->Item;
 733         void            *pv;
 734         const char      *pel;
 735         char            *sep = NULL;
 736
 737         /* Axe the namespace, we don't care about it */
 738         /*
 739           syslog(LOG_DEBUG,
 740           "RSS: supplied el %d: %s\n", RSSAggr->RSSAggr->ItemType, supplied_el);
 741         */
 742         pel = supplied_el;
 743         while (sep = strchr(pel, ':'), sep) {
 744                 pel = sep + 1;
 745         }
 746
 747         if (pel != supplied_el)
 748         {
 749                 void *v;
 750
 751                 if (!GetHash(KnownNameSpaces,
 752                              supplied_el,
 753                              pel - supplied_el - 1,
 754                              &v))
 755                 {
 756                         EVRSSATOM_syslog(LOG_DEBUG,
 757                                          "RSS: START ignoring "
 758                                          "because of wrong namespace [%s]\n",
 759                                          supplied_el);
 760                         return;
 761                 }
 762         }
 763
 764         StrBufPlain(RSSAggr->Key, pel, -1);
 765         StrBufLowerCase(RSSAggr->Key);
 766         if (GetHash(StartHandlers, SKEY(RSSAggr->Key), &pv))
 767         {
 768                 h = (rss_xml_handler*) pv;
 769
 770                 if (((h->Flags & RSS_UNSET) != 0) &&
 771                     (RSSAggr->ItemType == RSS_UNSET))
 772                 {
 773                         h->Handler(RSSAggr->CData, ri, RSSAggr, attr);
 774                 }
 775                 else if (((h->Flags & RSS_RSS) != 0) &&
 776                     (RSSAggr->ItemType == RSS_RSS))
 777                 {
 778                         h->Handler(RSSAggr->CData, ri, RSSAggr, attr);
 779                 }
 780                 else if (((h->Flags & RSS_ATOM) != 0) &&
 781                          (RSSAggr->ItemType == RSS_ATOM))
 782                 {
 783                         h->Handler(RSSAggr->CData,
 784                                    ri,
 785                                    RSSAggr,
 786                                    attr);
 787                 }
 788                 else
 789                         EVRSSATOM_syslog(LOG_DEBUG,
 790                                           "RSS: START unhandled: [%s] [%s]...\n",
 791                                          pel,
 792                                          supplied_el);
 793         }
 794         else
 795                 EVRSSATOM_syslog(LOG_DEBUG,
 796                                  "RSS: START unhandled: [%s] [%s]...\n",
 797                                  pel,
 798                                  supplied_el);
 799 }
 800
 801 void rss_xml_end(void *data, const char *supplied_el)
 802 {
 803         rss_xml_handler *h;
 804         rss_aggregator  *RSSAggr = (rss_aggregator*) data;
 805         AsyncIO         *IO = &RSSAggr->IO;
 806         rss_item        *ri = RSSAggr->Item;
 807         const char      *pel;
 808         char            *sep = NULL;
 809         void            *pv;
 810
 811         /* Axe the namespace, we don't care about it */
 812         pel = supplied_el;
 813         while (sep = strchr(pel, ':'), sep) {
 814                 pel = sep + 1;
 815         }
 816         EVRSSATOM_syslog(LOG_DEBUG, "RSS: END %s...\n", supplied_el);
 817         if (pel != supplied_el)
 818         {
 819                 void *v;
 820
 821                 if (!GetHash(KnownNameSpaces,
 822                              supplied_el,
 823                              pel - supplied_el - 1,
 824                              &v))
 825                 {
 826                         EVRSSATOM_syslog(LOG_DEBUG,
 827                                          "RSS: END ignoring because of wrong namespace"
 828                                          "[%s] = [%s]\n",
 829                                          supplied_el,
 830                                          ChrPtr(RSSAggr->CData));
 831                         FlushStrBuf(RSSAggr->CData);
 832                         return;
 833                 }
 834         }
 835
 836         StrBufPlain(RSSAggr->Key, pel, -1);
 837         StrBufLowerCase(RSSAggr->Key);
 838         if (GetHash(EndHandlers, SKEY(RSSAggr->Key), &pv))
 839         {
 840                 h = (rss_xml_handler*) pv;
 841
 842                 if (((h->Flags & RSS_UNSET) != 0) &&
 843                     (RSSAggr->ItemType == RSS_UNSET))
 844                 {
 845                         h->Handler(RSSAggr->CData, ri, RSSAggr, NULL);
 846                 }
 847                 else if (((h->Flags & RSS_RSS) != 0) &&
 848                     (RSSAggr->ItemType == RSS_RSS))
 849                 {
 850                         h->Handler(RSSAggr->CData, ri, RSSAggr, NULL);
 851                 }
 852                 else if (((h->Flags & RSS_ATOM) != 0) &&
 853                          (RSSAggr->ItemType == RSS_ATOM))
 854                 {
 855                         h->Handler(RSSAggr->CData, ri, RSSAggr, NULL);
 856                 }
 857                 else
 858                         EVRSSATOM_syslog(LOG_DEBUG,
 859                                          "RSS: END   unhandled: [%s]  [%s] = [%s]...\n",
 860                                          pel,
 861                                          supplied_el,
 862                                          ChrPtr(RSSAggr->CData));
 863         }
 864         else
 865                 EVRSSATOM_syslog(LOG_DEBUG,
 866                                  "RSS: END   unhandled: [%s]  [%s] = [%s]...\n",
 867                                  pel,
 868                                  supplied_el,
 869                                  ChrPtr(RSSAggr->CData));
 870         FlushStrBuf(RSSAggr->CData);
 871 }
 872
 873
 874
 875 /*
 876  * Callback function for passing libcurl's output to expat for parsing
 877  * we don't do streamed parsing so expat can handle non-utf8 documents
 878 size_t rss_libcurl_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 879 {
 880         XML_Parse((XML_Parser)stream, ptr, (size * nmemb), 0);
 881         return (size*nmemb);
 882 }
 883  */
 884
 885
 886
 887 eNextState RSSAggregator_ParseReply(AsyncIO *IO)
 888 {
 889         StrBuf *Buf;
 890         rss_aggregator *RSSAggr;
 891         rss_item *ri;
 892         const char *at;
 893         char *ptr;
 894         long len;
 895         const char *Key;
 896
 897         RSSAggr = IO->Data;
 898         ri = RSSAggr->Item;
 899         RSSAggr->CData = NewStrBufPlain(NULL, SIZ);
 900         RSSAggr->Key = NewStrBuf();
 901         at = NULL;
 902         StrBufSipLine(RSSAggr->Key, IO->HttpReq.ReplyData, &at);
 903         ptr = NULL;
 904
 905 #define encoding "encoding=\""
 906         ptr = strstr(ChrPtr(RSSAggr->Key), encoding);
 907         if (ptr != NULL)
 908         {
 909                 char *pche;
 910
 911                 ptr += sizeof (encoding) - 1;
 912                 pche = strchr(ptr, '"');
 913                 if (pche != NULL)
 914                         StrBufCutAt(RSSAggr->Key, -1, pche);
 915                 else
 916                         ptr = "UTF-8";
 917         }
 918         else
 919                 ptr = "UTF-8";
 920
 921         EVRSSATOM_syslog(LOG_DEBUG, "RSS: Now parsing [%s] \n", ChrPtr(RSSAggr->Url));
 922
 923         RSSAggr->xp = XML_ParserCreateNS(ptr, ':');
 924         if (!RSSAggr->xp) {
 925                 EVRSSATOMM_syslog(LOG_ALERT, "Cannot create XML parser!\n");
 926                 return eAbort;
 927         }
 928         FlushStrBuf(RSSAggr->Key);
 929
 930         RSSAggr->Messages = NewHash(1, Flathash);
 931         XML_SetElementHandler(RSSAggr->xp, rss_xml_start, rss_xml_end);
 932         XML_SetCharacterDataHandler(RSSAggr->xp, rss_xml_chardata);
 933         XML_SetUserData(RSSAggr->xp, RSSAggr);
 934         XML_SetCdataSectionHandler(RSSAggr->xp,
 935                                    rss_xml_cdata_start,
 936                                    rss_xml_cdata_end);
 937
 938
 939         len = StrLength(IO->HttpReq.ReplyData);
 940         ptr = SmashStrBuf(&IO->HttpReq.ReplyData);
 941         XML_Parse(RSSAggr->xp, ptr, len, 0);
 942         free (ptr);
 943         if (ri->done_parsing == 0)
 944                 XML_Parse(RSSAggr->xp, "", 0, 1);
 945
 946
 947         EVRSSATOM_syslog(LOG_DEBUG, "RSS: XML Status [%s] \n",
 948                          XML_ErrorString(XML_GetErrorCode(RSSAggr->xp)));
 949
 950         XML_ParserFree(RSSAggr->xp);
 951         flush_rss_item(ri);
 952
 953         Buf = NewStrBufDup(RSSAggr->rooms);
 954         RSSAggr->recp.recp_room = SmashStrBuf(&Buf);
 955         RSSAggr->recp.num_room = RSSAggr->roomlist_parts;
 956         RSSAggr->recp.recptypes_magic = RECPTYPES_MAGIC;
 957
 958         RSSAggr->Pos = GetNewHashPos(RSSAggr->Messages, 1);
 959
 960 //RSSAggr->next_poll = time(NULL) + config.c_net_freq;
 961         if (GetNextHashPos(RSSAggr->Messages,
 962                            RSSAggr->Pos,
 963                            &len,
 964                            &Key,
 965                            (void**) &RSSAggr->ThisMsg))
 966                 return NextDBOperation(IO, RSS_FetchNetworkUsetableEntry);
 967         else
 968                 return eAbort;
 969 }
 970
 971
 972 /******************************************************************************
 973  *                    RSS handler registering logic                           *
 974  ******************************************************************************/
 975
 976 void AddRSSStartHandler(rss_handler_func Handler,
 977                         int Flags,
 978                         const char *key,
 979                         long len)
 980 {
 981         rss_xml_handler *h;
 982         h = (rss_xml_handler*) malloc(sizeof (rss_xml_handler));
 983         h->Flags = Flags;
 984         h->Handler = Handler;
 985         Put(StartHandlers, key, len, h, NULL);
 986 }
 987
 988 void AddRSSEndHandler(rss_handler_func Handler,
 989                       int Flags,
 990                       const char *key,
 991                       long len)
 992 {
 993         rss_xml_handler *h;
 994         h = (rss_xml_handler*) malloc(sizeof (rss_xml_handler));
 995         h->Flags = Flags;
 996         h->Handler = Handler;
 997         Put(EndHandlers, key, len, h, NULL);
 998 }
 999
1000 void rss_parser_cleanup(void)
1001 {
1002         DeleteHash(&StartHandlers);
1003         DeleteHash(&EndHandlers);
1004         DeleteHash(&KnownNameSpaces);
1005 }
1006
1007 void LogDebugEnableRSSATOMParser(const int n)
1008 {
1009         RSSAtomParserDebugEnabled = n;
1010 }
1011
1012 CTDL_MODULE_INIT(rssparser)
1013 {
1014         if (!threading)
1015         {
1016                 StartHandlers = NewHash(1, NULL);
1017                 EndHandlers = NewHash(1, NULL);
1018
1019                 AddRSSStartHandler(RSS_item_rss_start,     RSS_UNSET, HKEY("rss"));
1020                 AddRSSStartHandler(RSS_item_rdf_start,     RSS_UNSET, HKEY("rdf"));
1021                 AddRSSStartHandler(ATOM_item_feed_start,   RSS_UNSET, HKEY("feed"));
1022                 AddRSSStartHandler(RSS_item_item_start,    RSS_RSS, HKEY("item"));
1023                 AddRSSStartHandler(ATOM_item_entry_start,  RSS_ATOM, HKEY("entry"));
1024                 AddRSSStartHandler(ATOM_item_link_start,   RSS_ATOM, HKEY("link"));
1025
1026                 AddRSSEndHandler(ATOMRSS_item_title_end,   RSS_ATOM|RSS_RSS|RSS_REQUIRE_BUF, HKEY("title"));
1027                 AddRSSEndHandler(RSS_item_guid_end,        RSS_RSS|RSS_REQUIRE_BUF, HKEY("guid"));
1028                 AddRSSEndHandler(ATOM_item_id_end,         RSS_ATOM|RSS_REQUIRE_BUF, HKEY("id"));
1029                 AddRSSEndHandler(RSS_item_link_end,        RSS_RSS|RSS_REQUIRE_BUF, HKEY("link"));
1030 #if 0
1031 // hm, rss to the comments of that blog, might be interesting in future, but...
1032                 AddRSSEndHandler(RSS_item_relink_end,      RSS_RSS|RSS_REQUIRE_BUF, HKEY("commentrss"));
1033 // comment count...
1034                 AddRSSEndHandler(RSS_item_relink_end,      RSS_RSS|RSS_REQUIRE_BUF, HKEY("comments"));
1035 #endif
1036                 AddRSSEndHandler(RSSATOM_item_title_end,   RSS_ATOM|RSS_RSS|RSS_REQUIRE_BUF, HKEY("title"));
1037                 AddRSSEndHandler(ATOM_item_content_end,    RSS_ATOM|RSS_REQUIRE_BUF, HKEY("content"));
1038                 AddRSSEndHandler(RSS_item_description_end, RSS_RSS|RSS_ATOM|RSS_REQUIRE_BUF, HKEY("encoded"));
1039                 AddRSSEndHandler(ATOM_item_summary_end,    RSS_ATOM|RSS_REQUIRE_BUF, HKEY("summary"));
1040                 AddRSSEndHandler(RSS_item_description_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("description"));
1041                 AddRSSEndHandler(ATOM_item_published_end,  RSS_ATOM|RSS_REQUIRE_BUF, HKEY("published"));
1042                 AddRSSEndHandler(ATOM_item_updated_end,    RSS_ATOM|RSS_REQUIRE_BUF, HKEY("updated"));
1043                 AddRSSEndHandler(RSS_item_pubdate_end,     RSS_RSS|RSS_REQUIRE_BUF, HKEY("pubdate"));
1044                 AddRSSEndHandler(RSS_item_date_end,        RSS_RSS|RSS_REQUIRE_BUF, HKEY("date"));
1045                 AddRSSEndHandler(RSS_item_author_end,      RSS_RSS|RSS_REQUIRE_BUF, HKEY("author"));
1046                 AddRSSEndHandler(RSS_item_creator_end,     RSS_RSS|RSS_REQUIRE_BUF, HKEY("creator"));
1047 /* <author> */
1048                 AddRSSEndHandler(ATOM_item_email_end,      RSS_ATOM|RSS_REQUIRE_BUF, HKEY("email"));
1049                 AddRSSEndHandler(ATOM_item_name_end,       RSS_ATOM|RSS_REQUIRE_BUF, HKEY("name"));
1050                 AddRSSEndHandler(ATOM_item_uri_end,        RSS_ATOM|RSS_REQUIRE_BUF, HKEY("uri"));
1051 /* </author> */
1052                 AddRSSEndHandler(RSS_item_item_end,        RSS_RSS, HKEY("item"));
1053                 AddRSSEndHandler(RSS_item_rss_end,         RSS_RSS, HKEY("rss"));
1054                 AddRSSEndHandler(RSS_item_rdf_end,         RSS_RSS, HKEY("rdf"));
1055                 AddRSSEndHandler(ATOM_item_entry_end,      RSS_ATOM, HKEY("entry"));
1056
1057
1058 /* at the start of atoms: <seq> <li>link to resource</li></seq> ignore them. */
1059                 AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("seq"));
1060                 AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("seq"));
1061                 AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("li"));
1062                 AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("li"));
1063
1064 /* links to other feed generators... */
1065                 AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("feedflare"));
1066                 AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("feedflare"));
1067                 AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("browserfriendly"));
1068                 AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("browserfriendly"));
1069
1070                 KnownNameSpaces = NewHash(1, NULL);
1071                 Put(KnownNameSpaces, HKEY("http://a9.com/-/spec/opensearch/1.1/"), NULL, reference_free_handler);
1072                 Put(KnownNameSpaces, HKEY("http://a9.com/-/spec/opensearchrss/1.0/"), NULL, reference_free_handler);
1073                 Put(KnownNameSpaces, HKEY("http://backend.userland.com/creativeCommonsRssModule"), NULL, reference_free_handler);
1074                 Put(KnownNameSpaces, HKEY("http://purl.org/atom/ns#"), NULL, reference_free_handler);
1075                 Put(KnownNameSpaces, HKEY("http://purl.org/dc/elements/1.1/"), NULL, reference_free_handler);
1076                 Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/"), NULL, reference_free_handler);
1077                 Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/content/"), NULL, reference_free_handler);
1078                 Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/slash/"), NULL, reference_free_handler);
1079                 Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/syndication/"), NULL, reference_free_handler);
1080                 Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/"), NULL, reference_free_handler);
1081                 Put(KnownNameSpaces, HKEY("http://purl.org/syndication/thread/1.0"), NULL, reference_free_handler);
1082                 Put(KnownNameSpaces, HKEY("http://rssnamespace.org/feedburner/ext/1.0"), NULL, reference_free_handler);
1083                 Put(KnownNameSpaces, HKEY("http://schemas.google.com/g/2005"), NULL, reference_free_handler);
1084                 Put(KnownNameSpaces, HKEY("http://webns.net/mvcb/"), NULL, reference_free_handler);
1085                 Put(KnownNameSpaces, HKEY("http://web.resource.org/cc/"), NULL, reference_free_handler);
1086                 Put(KnownNameSpaces, HKEY("http://wellformedweb.org/CommentAPI/"), NULL, reference_free_handler);
1087                 Put(KnownNameSpaces, HKEY("http://www.georss.org/georss"), NULL, reference_free_handler);
1088                 Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/xhtml"), NULL, reference_free_handler);
1089                 Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/02/22-rdf-syntax-ns#"), NULL, reference_free_handler);
1090                 Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/02/22-rdf-syntax-ns#"), NULL, reference_free_handler);
1091                 Put(KnownNameSpaces, HKEY("http://www.w3.org/2003/01/geo/wgs84_pos#"), NULL, reference_free_handler);
1092                 Put(KnownNameSpaces, HKEY("http://www.w3.org/2005/Atom"), NULL, reference_free_handler);
1093                 Put(KnownNameSpaces, HKEY("urn:flickr:"), NULL, reference_free_handler);
1094 #if 0
1095                 /* we don't like these namespaces because of they shadow our usefull parameters. */
1096                 Put(KnownNameSpaces, HKEY("http://search.yahoo.com/mrss/"), NULL, reference_free_handler);
1097 #endif
1098                 CtdlRegisterDebugFlagHook(HKEY("RSSAtomParser"), LogDebugEnableRSSATOMParser, &RSSAtomParserDebugEnabled);
1099                 CtdlRegisterCleanupHook(rss_parser_cleanup);
1100         }
1101         return "rssparser";
1102 }