citadel/modules/rssclient/serv_rssclient.c

   1 /*
   2  * Bring external RSS feeds into rooms.
   3  *
   4  * Copyright (c) 2007-2010 by the citadel.org team
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  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  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  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
  59 typedef struct rssnetcfg rssnetcfg;
  60 struct rssnetcfg {
  61         rssnetcfg *next;
  62         char url[256];
  63         char *rooms;
  64         time_t last_error_when;
  65         int ItemType;
  66 };
  67
  68 #define RSS_UNSET       (1<<0)
  69 #define RSS_RSS         (1<<1)
  70 #define RSS_ATOM        (1<<2)
  71 #define RSS_REQUIRE_BUF (1<<3)
  72
  73 typedef struct _rss_item {
  74         char *roomlist;
  75         int done_parsing;
  76         StrBuf *guid;
  77         StrBuf *title;
  78         StrBuf *link;
  79         StrBuf *linkTitle;
  80         StrBuf *reLink;
  81         StrBuf *reLinkTitle;
  82         StrBuf *description;
  83         time_t pubdate;
  84         StrBuf *channel_title;
  85         int item_tag_nesting;
  86         StrBuf *author_or_creator;
  87         StrBuf *author_url;
  88 }rss_item;
  89
  90
  91 typedef void (*rss_handler_func)(StrBuf *CData,
  92                                  rss_item *ri,
  93                                  rssnetcfg *Cfg,
  94                                  const char** Attr);
  95
  96 typedef struct __rss_xml_handler {
  97         int Flags;
  98         rss_handler_func Handler;
  99 }rss_xml_handler;
 100
 101
 102 typedef struct _rsscollection {
 103         StrBuf *CData;
 104         StrBuf *Key;
 105
 106         rss_item *Item;
 107         rssnetcfg *Cfg;
 108
 109         rss_xml_handler *Current;
 110 } rsscollection;
 111
 112 struct rssnetcfg *rnclist = NULL;
 113 HashList *StartHandlers;
 114 HashList *EndHandlers;
 115 HashList *KnownNameSpaces;
 116 void AddRSSStartHandler(rss_handler_func Handler, int Flags, const char *key, long len)
 117 {
 118         rss_xml_handler *h;
 119         h = (rss_xml_handler*) malloc(sizeof (rss_xml_handler));
 120         h->Flags = Flags;
 121         h->Handler = Handler;
 122         Put(StartHandlers, key, len, h, NULL);
 123 }
 124 void AddRSSEndHandler(rss_handler_func Handler, int Flags, const char *key, long len)
 125 {
 126         rss_xml_handler *h;
 127         h = (rss_xml_handler*) malloc(sizeof (rss_xml_handler));
 128         h->Flags = Flags;
 129         h->Handler = Handler;
 130         Put(EndHandlers, key, len, h, NULL);
 131 }
 132
 133 ///#if 0
 134 //#ifdef HAVE_ICONV
 135 #include <iconv.h>
 136
 137
 138 /*
 139  * dug this out of the trashcan of the midgard project, lets see if it works for us.
 140  * original code by Alexander Bokovoy <bokovoy@avilink.ne> distributed under GPL V2 or later
 141  */
 142
 143 /* Returns:
 144  >= 0 - successfull, 0 means conversion doesn't use multibyte sequences
 145    -1 - error during iconv_open call
 146    -2 - error during iconv_close call
 147    ----------------------------------
 148    This function expects that multibyte encoding in 'charset' wouldn't have
 149    characters with more than 3 bytes. It is not intended to convert UTF-8 because
 150    we'll never receive UTF-8 in our handler (it is handled by Exat itself).
 151 */
 152 static int
 153 fill_encoding_info (const char *charset, XML_Encoding * info)
 154 {
 155   iconv_t cd = (iconv_t)(-1);
 156   int flag;
 157         CtdlLogPrintf(0, "RSS: fill encoding info ...\n");
 158
 159 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 160   cd = iconv_open ("UCS-2LE", charset);
 161 #else
 162   cd = iconv_open ("UCS-2BE", charset);
 163 #endif
 164
 165   if (cd == (iconv_t) (-1))
 166     {
 167       return -1;
 168     }
 169
 170   {
 171     unsigned short out;
 172     unsigned char buf[4];
 173     unsigned int i0, i1, i2;
 174     int result;
 175     flag = 0;
 176     for (i0 = 0; i0 < 0x100; i0++)
 177       {
 178         buf[0] = i0;
 179         info->map[i0] = 0;
 180         //result = try (cd, buf, 1, &out);
 181         if (result < 0)
 182           {
 183           }
 184         else if (result > 0)
 185           {
 186             info->map[i0] = out;
 187           }
 188         else
 189           {
 190             for (i1 = 0; i1 < 0x100; i1++)
 191               {
 192                 buf[1] = i1;
 193                 ///result = try (cd, buf, 2, &out);
 194                 if (result < 0)
 195                   {
 196                   }
 197                 else if (result > 0)
 198                   {
 199                     flag++;
 200                     info->map[i0] = -2;
 201                   }
 202                 else
 203                   {
 204                     for (i2 = 0; i2 < 0x100; i2++)
 205                       {
 206                         buf[2] = i2;
 207                         ////result = try (cd, buf, 3, &out);
 208                         if (result < 0)
 209                           {
 210                           }
 211                         else if (result > 0)
 212                           {
 213                             flag++;
 214                             info->map[i0] = -3;
 215                           }
 216                       }
 217                   }
 218               }
 219           }
 220       }
 221   }
 222
 223   if (iconv_close (cd) < 0)
 224     {
 225       return -2;
 226     }
 227   return flag;
 228 }
 229
 230 static int
 231 iconv_convertor (void *data, const char *s)
 232 {
 233   XML_Encoding *info = data;
 234   int res;
 235         CtdlLogPrintf(0, "RSS: Converting ...\n");
 236
 237   if (s == NULL)
 238     return -1;
 239 /*
 240   GByteArray *result;
 241   result = g_byte_array_new ();
 242   if (process_block (info->data, (char *) s, strlen (s), result) == 0)
 243     {
 244       res = *(result->data);
 245       g_byte_array_free (result, TRUE);
 246       return res;
 247     }
 248   g_byte_array_free (result, TRUE);
 249 */
 250   return -1;
 251 }
 252
 253 static void
 254 my_release (void *data)
 255 {
 256   iconv_t cd = (iconv_t) data;
 257   if (iconv_close (cd) != 0)
 258     {
 259 /// TODO: uh no.      exit (1);
 260     }
 261 }
 262 int
 263 handle_unknown_xml_encoding (void *encodingHandleData,
 264                              const XML_Char * name,
 265                              XML_Encoding * info)
 266 {
 267   int result;
 268   CtdlLogPrintf(0, "RSS: unknown encoding ...\n");
 269   result = fill_encoding_info (name, info);
 270   if (result >= 0)
 271     {
 272       /*
 273         Special case: client asked for reverse conversion, we'll provide him with
 274         iconv descriptor which handles it. Client should release it by himself.
 275       */
 276       if(encodingHandleData != NULL)
 277             *((iconv_t *)encodingHandleData) = iconv_open(name, "UTF-8");
 278       /*
 279          Optimization: we do not need conversion function if encoding is one-to-one,
 280          info->map table will be enough
 281        */
 282       if (result == 0)
 283         {
 284           info->data = NULL;
 285           info->convert = NULL;
 286           info->release = NULL;
 287           return 1;
 288         }
 289       /*
 290          We do need conversion function because this encoding uses multibyte sequences
 291        */
 292       info->data = (void *) iconv_open ("UTF-8", name);
 293       if ((int)info->data == -1)
 294         return -1;
 295       info->convert = iconv_convertor;
 296       info->release = my_release;
 297       return 1;
 298     }
 299   if(encodingHandleData != NULL)
 300     *(iconv_t *)encodingHandleData = NULL;
 301   return 0;
 302 }
 303
 304 ///#endif
 305 //#endif
 306
 307 /*
 308  * Commit a fetched and parsed RSS item to disk
 309  */
 310 void rss_save_item(rss_item *ri)
 311 {
 312
 313         struct MD5Context md5context;
 314         u_char rawdigest[MD5_DIGEST_LEN];
 315         int i;
 316         char utmsgid[SIZ];
 317         struct cdbdata *cdbut;
 318         struct UseTable ut;
 319         struct CtdlMessage *msg;
 320         struct recptypes *recp = NULL;
 321         int msglen = 0;
 322
 323         recp = (struct recptypes *) malloc(sizeof(struct recptypes));
 324         if (recp == NULL) return;
 325         memset(recp, 0, sizeof(struct recptypes));
 326         memset(&ut, 0, sizeof(struct UseTable));
 327         recp->recp_room = strdup(ri->roomlist);
 328         recp->num_room = num_tokens(ri->roomlist, '|');
 329         recp->recptypes_magic = RECPTYPES_MAGIC;
 330
 331         /* Construct a GUID to use in the S_USETABLE table.
 332          * If one is not present in the item itself, make one up.
 333          */
 334         if (ri->guid != NULL) {
 335                 StrBufSpaceToBlank(ri->guid);
 336                 StrBufTrim(ri->guid);
 337                 snprintf(utmsgid, sizeof utmsgid, "rss/%s", ChrPtr(ri->guid));
 338         }
 339         else {
 340                 MD5Init(&md5context);
 341                 if (ri->title != NULL) {
 342                         MD5Update(&md5context, (const unsigned char*)ChrPtr(ri->title), StrLength(ri->title));
 343                 }
 344                 if (ri->link != NULL) {
 345                         MD5Update(&md5context, (const unsigned char*)ChrPtr(ri->link), StrLength(ri->link));
 346                 }
 347                 MD5Final(rawdigest, &md5context);
 348                 for (i=0; i<MD5_DIGEST_LEN; i++) {
 349                         sprintf(&utmsgid[i*2], "%02X", (unsigned char) (rawdigest[i] & 0xff));
 350                         utmsgid[i*2] = tolower(utmsgid[i*2]);
 351                         utmsgid[(i*2)+1] = tolower(utmsgid[(i*2)+1]);
 352                 }
 353                 strcat(utmsgid, "_rss2ctdl");
 354         }
 355
 356         /* Find out if we've already seen this item */
 357
 358         cdbut = cdb_fetch(CDB_USETABLE, utmsgid, strlen(utmsgid));
 359 #ifndef DEBUG_RSS
 360         if (cdbut != NULL) {
 361                 /* Item has already been seen */
 362                 CtdlLogPrintf(CTDL_DEBUG, "%s has already been seen\n", utmsgid);
 363                 cdb_free(cdbut);
 364
 365                 /* rewrite the record anyway, to update the timestamp */
 366                 strcpy(ut.ut_msgid, utmsgid);
 367                 ut.ut_timestamp = time(NULL);
 368                 cdb_store(CDB_USETABLE, utmsgid, strlen(utmsgid), &ut, sizeof(struct UseTable) );
 369         }
 370         else
 371 #endif
 372 {
 373                 /* Item has not been seen, so save it. */
 374                 CtdlLogPrintf(CTDL_DEBUG, "RSS: saving item...\n");
 375                 if (ri->description == NULL) ri->description = NewStrBufPlain(HKEY(""));
 376                 StrBufSpaceToBlank(ri->description);
 377                 msg = malloc(sizeof(struct CtdlMessage));
 378                 memset(msg, 0, sizeof(struct CtdlMessage));
 379                 msg->cm_magic = CTDLMESSAGE_MAGIC;
 380                 msg->cm_anon_type = MES_NORMAL;
 381                 msg->cm_format_type = FMT_RFC822;
 382
 383                 if (ri->guid != NULL) {
 384                         msg->cm_fields['E'] = strdup(ChrPtr(ri->guid));
 385                 }
 386
 387                 if (ri->author_or_creator != NULL) {
 388                         char *From;
 389                         StrBuf *Encoded, *QPEncoded;
 390                         StrBuf *UserName;
 391                         StrBuf *EmailAddress;
 392                         StrBuf *EncBuf;
 393
 394                         UserName = NewStrBuf();
 395                         EmailAddress = NewStrBuf();
 396                         EncBuf = NewStrBuf();
 397 ////TODO!
 398                         From = html_to_ascii(ChrPtr(ri->author_or_creator),
 399                                              StrLength(ri->author_or_creator),
 400                                              512, 0);
 401
 402                         Encoded = NewStrBufPlain(From, -1);
 403                         free(From);
 404                         StrBufTrim(Encoded);
 405                         QPEncoded = StrBufSanitizeEmailRecipientVector(Encoded, UserName, EmailAddress, EncBuf);
 406                         msg->cm_fields['A'] = SmashStrBuf(&QPEncoded);
 407
 408                         FreeStrBuf(&Encoded);
 409                         FreeStrBuf(&UserName);
 410                         FreeStrBuf(&EmailAddress);
 411                         FreeStrBuf(&EncBuf);
 412
 413                 }
 414                 else {
 415                         msg->cm_fields['A'] = strdup("rss");
 416                 }
 417
 418                 msg->cm_fields['N'] = strdup(NODENAME);
 419                 if (ri->title != NULL) {
 420                         long len;
 421                         char *Sbj;
 422                         StrBuf *Encoded, *QPEncoded;
 423
 424                         QPEncoded = NULL;
 425                         StrBufSpaceToBlank(ri->title);
 426                         len = StrLength(ri->title);
 427                         Sbj = html_to_ascii(ChrPtr(ri->title), len, 512, 0);
 428                         Encoded = NewStrBufPlain(Sbj, -1);
 429                         free(Sbj);
 430
 431                         StrBufTrim(Encoded);
 432                         StrBufRFC2047encode(&QPEncoded, Encoded);
 433
 434                         msg->cm_fields['U'] = SmashStrBuf(&QPEncoded);
 435                         FreeStrBuf(&Encoded);
 436                 }
 437                 msg->cm_fields['T'] = malloc(64);
 438                 snprintf(msg->cm_fields['T'], 64, "%ld", ri->pubdate);
 439                 if (ri->channel_title != NULL) {
 440                         if (StrLength(ri->channel_title) > 0) {
 441                                 msg->cm_fields['O'] = strdup(ChrPtr(ri->channel_title));
 442                         }
 443                 }
 444                 if (ri->link == NULL)
 445                         ri->link = NewStrBufPlain(HKEY(""));
 446                 msglen += 1024 + StrLength(ri->link) + StrLength(ri->description) ;
 447                 msg->cm_fields['M'] = malloc(msglen);
 448                 snprintf(msg->cm_fields['M'], msglen,
 449                          "Content-type: text/html; charset=\"UTF-8\"\r\n\r\n"
 450                          "<html><body>\n"
 451                          "%s<br><br>\n"
 452                          "<a href=\"%s\">%s</a><br>\n"
 453                          "<a href=\"%s\">%s</a>\n"
 454                          "</body></html>\n"
 455                          ,
 456                          ChrPtr(ri->description),
 457                          ChrPtr(ri->link),
 458                          (StrLength(ri->linkTitle)>0)?ChrPtr(ri->linkTitle):ChrPtr(ri->link),
 459                          ChrPtr(ri->reLink),
 460                          (StrLength(ri->reLinkTitle)>0)?ChrPtr(ri->reLinkTitle):"Reply to this"
 461                 );
 462
 463                 CtdlSubmitMsg(msg, recp, NULL, 0);
 464                 CtdlFreeMessage(msg);
 465
 466                 /* write the uidl to the use table so we don't store this item again */
 467                 strcpy(ut.ut_msgid, utmsgid);
 468                 ut.ut_timestamp = time(NULL);
 469                 cdb_store(CDB_USETABLE, utmsgid, strlen(utmsgid), &ut, sizeof(struct UseTable) );
 470         }
 471         free_recipients(recp);
 472 }
 473
 474
 475
 476 /*
 477  * Convert an RDF/RSS datestamp into a time_t
 478  */
 479 time_t rdf_parsedate(const char *p)
 480 {
 481         struct tm tm;
 482         time_t t = 0;
 483
 484         if (!p) return 0L;
 485         if (strlen(p) < 10) return 0L;
 486
 487         memset(&tm, 0, sizeof tm);
 488
 489         /*
 490          * If the timestamp appears to be in W3C datetime format, try to
 491          * parse it.  See also: http://www.w3.org/TR/NOTE-datetime
 492          *
 493          * This code, along with parsedate.c, is a potential candidate for
 494          * moving into libcitadel.
 495          */
 496         if ( (p[4] == '-') && (p[7] == '-') ) {
 497                 tm.tm_year = atoi(&p[0]) - 1900;
 498                 tm.tm_mon = atoi(&p[5]) - 1;
 499                 tm.tm_mday = atoi(&p[8]);
 500                 if ( (p[10] == 'T') && (p[13] == ':') ) {
 501                         tm.tm_hour = atoi(&p[11]);
 502                         tm.tm_min = atoi(&p[14]);
 503                 }
 504                 return mktime(&tm);
 505         }
 506
 507         /* hmm... try RFC822 date stamp format */
 508
 509         t = parsedate(p);
 510         if (t > 0) return(t);
 511
 512         /* yeesh.  ok, just return the current date and time. */
 513         return(time(NULL));
 514 }
 515
 516 void flush_rss_item(rss_item *ri)
 517 {
 518         /* Initialize the feed item data structure */
 519         FreeStrBuf(&ri->guid);
 520         FreeStrBuf(&ri->title);
 521         FreeStrBuf(&ri->link);
 522         FreeStrBuf(&ri->author_or_creator);
 523         FreeStrBuf(&ri->author_url);
 524         FreeStrBuf(&ri->description);
 525 }
 526
 527 void rss_xml_start(void *data, const char *supplied_el, const char **attr)
 528 {
 529         rss_xml_handler *h;
 530         rsscollection   *rssc = (rsscollection*) data;
 531         rssnetcfg       *Cfg = rssc->Cfg;
 532         rss_item        *ri = rssc->Item;
 533         void            *pv;
 534         const char      *pel;
 535         char            *sep = NULL;
 536
 537         /* Axe the namespace, we don't care about it */
 538 ///     CtdlLogPrintf(0, "RSS: supplied el %d: %s...\n", rssc->Cfg->ItemType, supplied_el);
 539         pel = supplied_el;
 540         while (sep = strchr(pel, ':'), sep) {
 541                 pel = sep + 1;
 542         }
 543
 544         if (pel != supplied_el)
 545         {
 546                 void *v;
 547
 548                 if (!GetHash(KnownNameSpaces,
 549                              supplied_el,
 550                              pel - supplied_el - 1,
 551                              &v))
 552                 {
 553 #ifdef DEBUG_RSS
 554                         CtdlLogPrintf(0, "RSS: START ignoring because of wrong namespace [%s] = [%s]\n",
 555                                       supplied_el);
 556 #endif
 557                         return;
 558                 }
 559         }
 560
 561         StrBufPlain(rssc->Key, pel, -1);
 562         StrBufLowerCase(rssc->Key);
 563         if (GetHash(StartHandlers, SKEY(rssc->Key), &pv))
 564         {
 565                 rssc->Current = h = (rss_xml_handler*) pv;
 566
 567                 if (((h->Flags & RSS_UNSET) != 0) &&
 568                     (Cfg->ItemType == RSS_UNSET))
 569                 {
 570                         h->Handler(rssc->CData, ri, Cfg, attr);
 571                 }
 572                 else if (((h->Flags & RSS_RSS) != 0) &&
 573                     (Cfg->ItemType == RSS_RSS))
 574                 {
 575                         h->Handler(rssc->CData, ri, Cfg, attr);
 576                 }
 577                 else if (((h->Flags & RSS_ATOM) != 0) &&
 578                          (Cfg->ItemType == RSS_ATOM))
 579                 {
 580                         h->Handler(rssc->CData, ri, Cfg, attr);
 581                 }
 582 #ifdef DEBUG_RSS
 583                 else
 584                         CtdlLogPrintf(0, "RSS: START unhandled: [%s] [%s]...\n", pel, supplied_el);
 585 #endif
 586         }
 587 #ifdef DEBUG_RSS
 588         else
 589                 CtdlLogPrintf(0, "RSS: START unhandled: [%s] [%s]...\n", pel,  supplied_el);
 590 #endif
 591 }
 592
 593 void rss_xml_end(void *data, const char *supplied_el)
 594 {
 595         rss_xml_handler *h;
 596         rsscollection   *rssc = (rsscollection*) data;
 597         rssnetcfg       *Cfg = rssc->Cfg;
 598         rss_item        *ri = rssc->Item;
 599         const char      *pel;
 600         char            *sep = NULL;
 601         void            *pv;
 602
 603         /* Axe the namespace, we don't care about it */
 604         pel = supplied_el;
 605         while (sep = strchr(pel, ':'), sep) {
 606                 pel = sep + 1;
 607         }
 608 //      CtdlLogPrintf(0, "RSS: END %s...\n", el);
 609         if (pel != supplied_el)
 610         {
 611                 void *v;
 612
 613                 if (!GetHash(KnownNameSpaces,
 614                              supplied_el,
 615                              pel - supplied_el - 1,
 616                              &v))
 617                 {
 618 #ifdef DEBUG_RSS
 619                         CtdlLogPrintf(0, "RSS: END ignoring because of wrong namespace [%s] = [%s]\n",
 620                                       supplied_el, ChrPtr(rssc->CData));
 621 #endif
 622                         FlushStrBuf(rssc->CData);
 623                         return;
 624                 }
 625         }
 626
 627         StrBufPlain(rssc->Key, pel, -1);
 628         StrBufLowerCase(rssc->Key);
 629         if (GetHash(EndHandlers, SKEY(rssc->Key), &pv))
 630         {
 631                 h = (rss_xml_handler*) pv;
 632
 633                 if (((h->Flags & RSS_UNSET) != 0) &&
 634                     (Cfg->ItemType == RSS_UNSET))
 635                 {
 636                         h->Handler(rssc->CData, ri, Cfg, NULL);
 637                 }
 638                 else if (((h->Flags & RSS_RSS) != 0) &&
 639                     (Cfg->ItemType == RSS_RSS))
 640                 {
 641                         h->Handler(rssc->CData, ri, Cfg, NULL);
 642                 }
 643                 else if (((h->Flags & RSS_ATOM) != 0) &&
 644                          (Cfg->ItemType == RSS_ATOM))
 645                 {
 646                         h->Handler(rssc->CData, ri, Cfg, NULL);
 647                 }
 648 #ifdef DEBUG_RSS
 649                 else
 650                         CtdlLogPrintf(0, "RSS: END   unhandled: [%s]  [%s] = [%s]...\n", pel, supplied_el, ChrPtr(rssc->CData));
 651 #endif
 652         }
 653 #ifdef DEBUG_RSS
 654         else
 655                 CtdlLogPrintf(0, "RSS: END   unhandled: [%s]  [%s] = [%s]...\n", pel, supplied_el, ChrPtr(rssc->CData));
 656 #endif
 657         FlushStrBuf(rssc->CData);
 658         rssc->Current = NULL;
 659 }
 660
 661
 662
 663
 664
 665 void RSS_item_rss_start (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 666 {
 667         CtdlLogPrintf(CTDL_DEBUG, "RSS: This is an RSS feed.\n");
 668         Cfg->ItemType = RSS_RSS;
 669 }
 670
 671 void RSS_item_rdf_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 672 {
 673         CtdlLogPrintf(CTDL_DEBUG, "RSS: This is an RDF feed.\n");
 674         Cfg->ItemType = RSS_RSS;
 675 }
 676
 677 void ATOM_item_feed_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 678 {
 679         CtdlLogPrintf(CTDL_DEBUG, "RSS: This is an ATOM feed.\n");
 680         Cfg->ItemType = RSS_ATOM;
 681 }
 682
 683
 684 void RSS_item_item_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 685 {
 686         ri->item_tag_nesting ++;
 687         flush_rss_item(ri);
 688 }
 689
 690 void ATOM_item_entry_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 691 {
 692 /* Atom feed... */
 693         ri->item_tag_nesting ++;
 694         flush_rss_item(ri);
 695 }
 696
 697 void ATOM_item_link_start (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 698 {
 699         int i;
 700         const char *pHref = NULL;
 701         const char *pType = NULL;
 702         const char *pRel = NULL;
 703         const char *pTitle = NULL;
 704
 705         for (i = 0; Attr[i] != NULL; i+=2)
 706         {
 707                 if (!strcmp(Attr[i], "href"))
 708                 {
 709                         pHref = Attr[i+1];
 710                 }
 711                 else if (!strcmp(Attr[i], "rel"))
 712                 {
 713                         pRel = Attr[i+1];
 714                 }
 715                 else if (!strcmp(Attr[i], "type"))
 716                 {
 717                         pType = Attr[i+1];
 718                 }
 719                 else if (!strcmp(Attr[i], "title"))
 720                 {
 721                         pTitle = Attr[i+1];
 722                 }
 723         }
 724         if (pHref == NULL)
 725                 return; /* WHUT? Pointing... where? */
 726         if ((pType != NULL) && !strcasecmp(pType, "application/atom+xml"))
 727                 return; /* these just point to other rss resources, we're not interested in them. */
 728         if (pRel != NULL)
 729         {
 730                 if (!strcasecmp (pRel, "replies"))
 731                 {
 732                         NewStrBufDupAppendFlush(&ri->reLink, NULL, pHref, -1);
 733                         StrBufTrim(ri->link);
 734                         NewStrBufDupAppendFlush(&ri->reLinkTitle, NULL, pTitle, -1);
 735                 }
 736                 else if (!strcasecmp(pRel, "alternate")) /* Alternative representation of this Item... */
 737                 {
 738                         NewStrBufDupAppendFlush(&ri->link, NULL, pHref, -1);
 739                         StrBufTrim(ri->link);
 740                         NewStrBufDupAppendFlush(&ri->linkTitle, NULL, pTitle, -1);
 741
 742                 }
 743 #if 0 /* these are also defined, but dunno what to do with them.. */
 744                 else if (!strcasecmp(pRel, "related"))
 745                 {
 746                 }
 747                 else if (!strcasecmp(pRel, "self"))
 748                 {
 749                 }
 750                 else if (!strcasecmp(pRel, "enclosure"))
 751                 {/* this reference can get big, and is probably the full article... */
 752                 }
 753                 else if (!strcasecmp(pRel, "via"))
 754                 {/* this article was provided via... */
 755                 }
 756 #endif
 757         }
 758         else if (StrLength(ri->link) == 0)
 759         {
 760                 NewStrBufDupAppendFlush(&ri->link, NULL, pHref, -1);
 761                 StrBufTrim(ri->link);
 762                 NewStrBufDupAppendFlush(&ri->linkTitle, NULL, pTitle, -1);
 763         }
 764 }
 765
 766
 767
 768
 769 void ATOMRSS_item_title_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 770 {
 771         if ((ri->item_tag_nesting == 0) && (StrLength(CData) > 0)) {
 772                 NewStrBufDupAppendFlush(&ri->channel_title, CData, NULL, 0);
 773                 StrBufTrim(ri->channel_title);
 774         }
 775 }
 776
 777 void RSS_item_guid_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 778 {
 779         if (StrLength(CData) > 0) {
 780                 NewStrBufDupAppendFlush(&ri->guid, CData, NULL, 0);
 781         }
 782 }
 783
 784 void ATOM_item_id_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 785 {
 786         if (StrLength(CData) > 0) {
 787                 NewStrBufDupAppendFlush(&ri->guid, CData, NULL, 0);
 788         }
 789 }
 790
 791
 792 void RSS_item_link_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 793 {
 794         if (StrLength(CData) > 0) {
 795                 NewStrBufDupAppendFlush(&ri->link, CData, NULL, 0);
 796                 StrBufTrim(ri->link);
 797         }
 798 }
 799
 800 void RSSATOM_item_title_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 801 {
 802         if (StrLength(CData) > 0) {
 803                 NewStrBufDupAppendFlush(&ri->title, CData, NULL, 0);
 804                 StrBufTrim(ri->title);
 805         }
 806 }
 807
 808 void ATOM_item_content_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 809 {
 810         if (StrLength(CData) > 0) {
 811                 NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
 812                 StrBufTrim(ri->description);
 813         }
 814 }
 815 void ATOM_item_summary_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 816 {
 817         /* this can contain an abstract of the article. but we don't want to verwrite a full document if we already have it. */
 818         if ((StrLength(CData) > 0) && (StrLength(ri->description) == 0))
 819         {
 820                 NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
 821                 StrBufTrim(ri->description);
 822         }
 823 }
 824
 825 void RSS_item_description_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 826 {
 827         if (StrLength(CData) > 0) {
 828                 NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
 829         }
 830 }
 831
 832 void ATOM_item_published_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 833 {
 834         if (StrLength(CData) > 0) {
 835                 StrBufTrim(CData);
 836                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 837         }
 838 }
 839
 840 void ATOM_item_updated_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 841 {
 842         if (StrLength(CData) > 0) {
 843                 StrBufTrim(CData);
 844                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 845         }
 846 }
 847
 848 void RSS_item_pubdate_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 849 {
 850         if (StrLength(CData) > 0) {
 851                 StrBufTrim(CData);
 852                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 853         }
 854 }
 855
 856
 857 void RSS_item_date_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 858 {
 859         if (StrLength(CData) > 0) {
 860                 StrBufTrim(CData);
 861                 ri->pubdate = rdf_parsedate(ChrPtr(CData));
 862         }
 863 }
 864
 865
 866
 867 void RSS_item_author_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 868 {
 869         if (StrLength(CData) > 0) {
 870                 NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
 871                 StrBufTrim(ri->author_or_creator);
 872         }
 873 }
 874
 875
 876 void ATOM_item_name_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 877 {
 878         if (StrLength(CData) > 0) {
 879                 NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
 880                 StrBufTrim(ri->author_or_creator);
 881         }
 882 }
 883
 884 void RSS_item_creator_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 885 {
 886         if ((StrLength(CData) > 0) &&
 887             (StrLength(ri->author_or_creator) == 0))
 888         {
 889                 NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
 890                 StrBufTrim(ri->author_or_creator);
 891         }
 892 }
 893
 894
 895 void ATOM_item_uri_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 896 {
 897         if (StrLength(CData) > 0) {
 898                 NewStrBufDupAppendFlush(&ri->author_url, CData, NULL, 0);
 899                 StrBufTrim(ri->author_url);
 900         }
 901 }
 902
 903 void RSS_item_item_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 904 {
 905         --ri->item_tag_nesting;
 906         rss_save_item(ri);
 907 }
 908
 909
 910 void ATOM_item_entry_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 911 {
 912         --ri->item_tag_nesting;
 913         rss_save_item(ri);
 914 }
 915
 916 void RSS_item_rss_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 917 {
 918 //              CtdlLogPrintf(CTDL_DEBUG, "End of feed detected.  Closing parser.\n");
 919         ri->done_parsing = 1;
 920
 921 }
 922 void RSS_item_rdf_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 923 {
 924 //              CtdlLogPrintf(CTDL_DEBUG, "End of feed detected.  Closing parser.\n");
 925         ri->done_parsing = 1;
 926 }
 927
 928
 929 void RSSATOM_item_ignore(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
 930 {
 931 }
 932
 933
 934
 935 /*
 936  * This callback stores up the data which appears in between tags.
 937  */
 938 void rss_xml_cdata_start(void *data)
 939 {
 940         rsscollection *rssc = (rsscollection*) data;
 941
 942         FlushStrBuf(rssc->CData);
 943 }
 944
 945 void rss_xml_cdata_end(void *data)
 946 {
 947 }
 948 void rss_xml_chardata(void *data, const XML_Char *s, int len)
 949 {
 950         rsscollection *rssc = (rsscollection*) data;
 951
 952         StrBufAppendBufPlain (rssc->CData, s, len, 0);
 953 }
 954
 955 /*
 956  * Callback function for passing libcurl's output to expat for parsing
 957  */
 958 size_t rss_libcurl_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 959 {
 960         XML_Parse((XML_Parser)stream, ptr, (size * nmemb), 0);
 961         return (size*nmemb);
 962 }
 963
 964
 965
 966 /*
 967  * Begin a feed parse
 968  */
 969 void rss_do_fetching(rssnetcfg *Cfg) {
 970         rsscollection rssc;
 971         rss_item ri;
 972         XML_Parser xp;
 973         StrBuf *Answer;
 974
 975         CURL *curl;
 976         CURLcode res;
 977         char errmsg[1024] = "";
 978         char *ptr;
 979         const char *at;
 980         long len;
 981
 982         memset(&ri, 0, sizeof(rss_item));
 983         rssc.Item = &ri;
 984         rssc.Cfg = Cfg;
 985
 986         CtdlLogPrintf(CTDL_DEBUG, "Fetching RSS feed <%s>\n", Cfg->url);
 987
 988         curl = curl_easy_init();
 989         if (!curl) {
 990                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 991                 return;
 992         }
 993         Answer = NewStrBufPlain(NULL, SIZ);
 994
 995         curl_easy_setopt(curl, CURLOPT_URL, Cfg->url);
 996         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 997         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 998         curl_easy_setopt(curl, CURLOPT_WRITEDATA, Answer);
 999 //      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, rss_libcurl_callback);
1000         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1001         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
1002         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
1003 #ifdef CURLOPT_HTTP_CONTENT_DECODING
1004         curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
1005         curl_easy_setopt(curl, CURLOPT_ENCODING, "");
1006 #endif
1007         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
1008         curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180);           /* die after 180 seconds */
1009         if (
1010                 (!IsEmptyStr(config.c_ip_addr))
1011                 && (strcmp(config.c_ip_addr, "*"))
1012                 && (strcmp(config.c_ip_addr, "::"))
1013                 && (strcmp(config.c_ip_addr, "0.0.0.0"))
1014         ) {
1015                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
1016         }
1017
1018         if (CtdlThreadCheckStop())
1019         {
1020                 curl_easy_cleanup(curl);
1021                 return;
1022         }
1023
1024         if (CtdlThreadCheckStop())
1025                 goto shutdown ;
1026
1027         res = curl_easy_perform(curl);
1028         if (res) {
1029                 CtdlLogPrintf(CTDL_ALERT, "libcurl error %d: %s\n", res, errmsg);
1030         }
1031
1032         if (CtdlThreadCheckStop())
1033                 goto shutdown ;
1034
1035
1036
1037
1038         memset(&ri, 0, sizeof(rss_item));
1039         ri.roomlist = Cfg->rooms;
1040         rssc.CData = NewStrBufPlain(NULL, SIZ);
1041         rssc.Key = NewStrBuf();
1042         at = NULL;
1043         StrBufSipLine(rssc.Key, Answer, &at);
1044         ptr = NULL;
1045
1046 #define encoding "encoding=\""
1047         ptr = strstr(ChrPtr(rssc.Key), encoding);
1048         if (ptr != NULL)
1049         {
1050                 char *pche;
1051
1052                 ptr += sizeof (encoding) - 1;
1053                 pche = strchr(ptr, '"');
1054                 if (pche != NULL)
1055                         StrBufCutAt(rssc.Key, -1, pche);
1056                 else
1057                         ptr = "UTF-8";
1058         }
1059         else
1060                 ptr = "UTF-8";
1061
1062
1063         xp = XML_ParserCreateNS(ptr, ':');
1064         if (!xp) {
1065                 CtdlLogPrintf(CTDL_ALERT, "Cannot create XML parser!\n");
1066                 goto shutdown;
1067         }
1068         FlushStrBuf(rssc.Key);
1069 //#ifdef HAVE_ICONV
1070 #if 0
1071         XML_SetUnknownEncodingHandler(xp,
1072                                       handle_unknown_xml_encoding,
1073                                       &rssc);
1074 #endif
1075 //#endif
1076         XML_SetElementHandler(xp, rss_xml_start, rss_xml_end);
1077         XML_SetCharacterDataHandler(xp, rss_xml_chardata);
1078         XML_SetUserData(xp, &rssc);
1079         XML_SetCdataSectionHandler(xp,
1080                                    rss_xml_cdata_start,
1081                                    rss_xml_cdata_end);
1082
1083
1084         len = StrLength(Answer);
1085         ptr = SmashStrBuf(&Answer);
1086         XML_Parse(xp, ptr, len, 0);
1087         free (ptr);
1088         if (ri.done_parsing == 0)
1089                 XML_Parse(xp, "", 0, 1);
1090
1091
1092         CtdlLogPrintf(CTDL_ALERT, "RSS: XML Status [%s] \n",
1093                       XML_ErrorString(
1094                               XML_GetErrorCode(xp)));
1095
1096 shutdown:
1097         curl_easy_cleanup(curl);
1098         XML_ParserFree(xp);
1099
1100         flush_rss_item(&ri);
1101         FreeStrBuf(&rssc.CData);
1102         FreeStrBuf(&rssc.Key);
1103 }
1104
1105
1106 /*
1107  * Scan a room's netconfig to determine whether it is requesting any RSS feeds
1108  */
1109 void rssclient_scan_room(struct ctdlroom *qrbuf, void *data)
1110 {
1111         char filename[PATH_MAX];
1112         char buf[1024];
1113         char instr[32];
1114         FILE *fp;
1115         char feedurl[256];
1116         rssnetcfg *rncptr = NULL;
1117         rssnetcfg *use_this_rncptr = NULL;
1118         int len = 0;
1119         char *ptr = NULL;
1120
1121         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
1122
1123         if (CtdlThreadCheckStop())
1124                 return;
1125
1126         /* Only do net processing for rooms that have netconfigs */
1127         fp = fopen(filename, "r");
1128         if (fp == NULL) {
1129                 return;
1130         }
1131
1132         while (fgets(buf, sizeof buf, fp) != NULL && !CtdlThreadCheckStop()) {
1133                 buf[strlen(buf)-1] = 0;
1134
1135                 extract_token(instr, buf, 0, '|', sizeof instr);
1136                 if (!strcasecmp(instr, "rssclient")) {
1137
1138                         use_this_rncptr = NULL;
1139
1140                         extract_token(feedurl, buf, 1, '|', sizeof feedurl);
1141
1142                         /* If any other rooms have requested the same feed, then we will just add this
1143                          * room to the target list for that client request.
1144                          */
1145                         for (rncptr=rnclist; rncptr!=NULL; rncptr=rncptr->next) {
1146                                 if (!strcmp(rncptr->url, feedurl)) {
1147                                         use_this_rncptr = rncptr;
1148                                 }
1149                         }
1150
1151                         /* Otherwise create a new client request */
1152                         if (use_this_rncptr == NULL) {
1153                                 rncptr = (rssnetcfg *) malloc(sizeof(rssnetcfg));
1154                                 rncptr->ItemType = RSS_UNSET;
1155                                 if (rncptr != NULL) {
1156                                         rncptr->next = rnclist;
1157                                         safestrncpy(rncptr->url, feedurl, sizeof rncptr->url);
1158                                         rncptr->rooms = NULL;
1159                                         rnclist = rncptr;
1160                                         use_this_rncptr = rncptr;
1161                                 }
1162                         }
1163
1164                         /* Add the room name to the request */
1165                         if (use_this_rncptr != NULL) {
1166                                 if (use_this_rncptr->rooms == NULL) {
1167                                         rncptr->rooms = strdup(qrbuf->QRname);
1168                                 }
1169                                 else {
1170                                         len = strlen(use_this_rncptr->rooms) + strlen(qrbuf->QRname) + 5;
1171                                         ptr = realloc(use_this_rncptr->rooms, len);
1172                                         if (ptr != NULL) {
1173                                                 strcat(ptr, "|");
1174                                                 strcat(ptr, qrbuf->QRname);
1175                                                 use_this_rncptr->rooms = ptr;
1176                                         }
1177                                 }
1178                         }
1179                 }
1180
1181         }
1182
1183         fclose(fp);
1184
1185 }
1186
1187 /*
1188  * Scan for rooms that have RSS client requests configured
1189  */
1190 void *rssclient_scan(void *args) {
1191         static time_t last_run = 0L;
1192         static int doing_rssclient = 0;
1193         rssnetcfg *rptr = NULL;
1194         CitContext rssclientCC;
1195
1196         /* Give this thread its own private CitContext */
1197         CtdlFillSystemContext(&rssclientCC, "rssclient");
1198         citthread_setspecific(MyConKey, (void *)&rssclientCC );
1199
1200         /*
1201          * This is a simple concurrency check to make sure only one rssclient run
1202          * is done at a time.  We could do this with a mutex, but since we
1203          * don't really require extremely fine granularity here, we'll do it
1204          * with a static variable instead.
1205          */
1206         if (doing_rssclient) return NULL;
1207         doing_rssclient = 1;
1208
1209         CtdlLogPrintf(CTDL_DEBUG, "rssclient started\n");
1210         CtdlForEachRoom(rssclient_scan_room, NULL);
1211
1212         while (rnclist != NULL && !CtdlThreadCheckStop()) {
1213                 rss_do_fetching(rnclist);
1214                 rptr = rnclist;
1215                 rnclist = rnclist->next;
1216                 if (rptr->rooms != NULL) free(rptr->rooms);
1217                 free(rptr);
1218         }
1219
1220         CtdlLogPrintf(CTDL_DEBUG, "rssclient ended\n");
1221         last_run = time(NULL);
1222         doing_rssclient = 0;
1223         if (!CtdlThreadCheckStop())
1224                 CtdlThreadSchedule ("RSS Client", CTDLTHREAD_BIGSTACK, rssclient_scan, NULL, last_run + config.c_net_freq);
1225         else
1226                 CtdlLogPrintf(CTDL_DEBUG, "rssclient: Task STOPPED.\n");
1227         CtdlClearSystemContext();
1228         return NULL;
1229 }
1230
1231
1232 CTDL_MODULE_INIT(rssclient)
1233 {
1234         if (threading)
1235         {
1236                 CtdlLogPrintf(CTDL_INFO, "%s\n", curl_version());
1237                 CtdlThreadSchedule ("RSS Client", CTDLTHREAD_BIGSTACK, rssclient_scan, NULL, 0);
1238         }
1239
1240         StartHandlers = NewHash(1, NULL);
1241         EndHandlers = NewHash(1, NULL);
1242
1243         AddRSSStartHandler(RSS_item_rss_start,     RSS_UNSET, HKEY("rss"));
1244         AddRSSStartHandler(RSS_item_rdf_start,     RSS_UNSET, HKEY("rdf"));
1245         AddRSSStartHandler(ATOM_item_feed_start,    RSS_UNSET, HKEY("feed"));
1246         AddRSSStartHandler(RSS_item_item_start,    RSS_RSS, HKEY("item"));
1247         AddRSSStartHandler(ATOM_item_entry_start,  RSS_ATOM, HKEY("entry"));
1248         AddRSSStartHandler(ATOM_item_link_start,   RSS_ATOM, HKEY("link"));
1249
1250         AddRSSEndHandler(ATOMRSS_item_title_end,   RSS_ATOM|RSS_RSS|RSS_REQUIRE_BUF, HKEY("title"));
1251         AddRSSEndHandler(RSS_item_guid_end,        RSS_RSS|RSS_REQUIRE_BUF, HKEY("guid"));
1252         AddRSSEndHandler(ATOM_item_id_end,         RSS_ATOM|RSS_REQUIRE_BUF, HKEY("id"));
1253         AddRSSEndHandler(RSS_item_link_end,        RSS_RSS|RSS_REQUIRE_BUF, HKEY("link"));
1254         AddRSSEndHandler(RSSATOM_item_title_end,   RSS_ATOM|RSS_RSS|RSS_REQUIRE_BUF, HKEY("title"));
1255         AddRSSEndHandler(ATOM_item_content_end,    RSS_ATOM|RSS_REQUIRE_BUF, HKEY("content"));
1256         AddRSSEndHandler(RSS_item_description_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("encoded"));
1257         AddRSSEndHandler(ATOM_item_summary_end,    RSS_ATOM|RSS_REQUIRE_BUF, HKEY("summary"));
1258         AddRSSEndHandler(RSS_item_description_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("description"));
1259         AddRSSEndHandler(ATOM_item_published_end,  RSS_ATOM|RSS_REQUIRE_BUF, HKEY("published"));
1260         AddRSSEndHandler(ATOM_item_updated_end,    RSS_ATOM|RSS_REQUIRE_BUF, HKEY("updated"));
1261         AddRSSEndHandler(RSS_item_pubdate_end,     RSS_RSS|RSS_REQUIRE_BUF, HKEY("pubdate"));
1262         AddRSSEndHandler(RSS_item_date_end,        RSS_RSS|RSS_REQUIRE_BUF, HKEY("date"));
1263         AddRSSEndHandler(RSS_item_author_end,      RSS_RSS|RSS_REQUIRE_BUF, HKEY("author"));
1264         AddRSSEndHandler(RSS_item_creator_end,     RSS_RSS|RSS_REQUIRE_BUF, HKEY("creator"));
1265         AddRSSEndHandler(ATOM_item_name_end,       RSS_ATOM|RSS_REQUIRE_BUF, HKEY("name"));
1266         AddRSSEndHandler(ATOM_item_uri_end,        RSS_ATOM|RSS_REQUIRE_BUF, HKEY("uri"));
1267
1268         AddRSSEndHandler(RSS_item_item_end,        RSS_RSS, HKEY("item"));
1269         AddRSSEndHandler(RSS_item_rss_end,         RSS_RSS, HKEY("rss"));
1270         AddRSSEndHandler(RSS_item_rdf_end,         RSS_RSS, HKEY("rdf"));
1271         AddRSSEndHandler(ATOM_item_entry_end,      RSS_ATOM, HKEY("entry"));
1272
1273
1274 /* at the start of atoms: <seq> <li>link to resource</li></seq> ignore them. */
1275         AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("seq"));
1276         AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("seq"));
1277         AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("li"));
1278         AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("li"));
1279
1280 /* links to other feed generators... */
1281         AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("feedflare"));
1282         AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("feedflare"));
1283         AddRSSStartHandler(RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("browserfriendly"));
1284         AddRSSEndHandler  (RSSATOM_item_ignore,      RSS_RSS|RSS_ATOM, HKEY("browserfriendly"));
1285
1286         KnownNameSpaces = NewHash(1, NULL);
1287         Put(KnownNameSpaces, HKEY("http://a9.com/-/spec/opensearch/1.1/"), NULL, reference_free_handler);
1288         Put(KnownNameSpaces, HKEY("http://a9.com/-/spec/opensearchrss/1.0/"), NULL, reference_free_handler);
1289         Put(KnownNameSpaces, HKEY("http://backend.userland.com/creativeCommonsRssModule"), NULL, reference_free_handler);
1290         Put(KnownNameSpaces, HKEY("http://purl.org/atom/ns#"), NULL, reference_free_handler);
1291         Put(KnownNameSpaces, HKEY("http://purl.org/dc/elements/1.1/"), NULL, reference_free_handler);
1292         Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/"), NULL, reference_free_handler);
1293         Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/content/"), NULL, reference_free_handler);
1294         Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/slash/"), NULL, reference_free_handler);
1295         Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/syndication/"), NULL, reference_free_handler);
1296         Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/"), NULL, reference_free_handler);
1297         Put(KnownNameSpaces, HKEY("http://purl.org/syndication/thread/1.0"), NULL, reference_free_handler);
1298         Put(KnownNameSpaces, HKEY("http://rssnamespace.org/feedburner/ext/1.0"), NULL, reference_free_handler);
1299         Put(KnownNameSpaces, HKEY("http://schemas.google.com/g/2005"), NULL, reference_free_handler);
1300         Put(KnownNameSpaces, HKEY("http://webns.net/mvcb/"), NULL, reference_free_handler);
1301         Put(KnownNameSpaces, HKEY("http://web.resource.org/cc/"), NULL, reference_free_handler);
1302         Put(KnownNameSpaces, HKEY("http://wellformedweb.org/CommentAPI/"), NULL, reference_free_handler);
1303         Put(KnownNameSpaces, HKEY("http://www.georss.org/georss"), NULL, reference_free_handler);
1304         Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/xhtml"), NULL, reference_free_handler);
1305         Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/02/22-rdf-syntax-ns#"), NULL, reference_free_handler);
1306         Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/02/22-rdf-syntax-ns#"), NULL, reference_free_handler);
1307         Put(KnownNameSpaces, HKEY("http://www.w3.org/2003/01/geo/wgs84_pos#"), NULL, reference_free_handler);
1308         Put(KnownNameSpaces, HKEY("http://www.w3.org/2005/Atom"), NULL, reference_free_handler);
1309         Put(KnownNameSpaces, HKEY("urn:flickr:"), NULL, reference_free_handler);
1310 #if 0
1311         /* we don't like these namespaces because of they shadow our usefull parameters. */
1312         Put(KnownNameSpaces, HKEY("http://search.yahoo.com/mrss/"), NULL, reference_free_handler);
1313 #endif
1314         return "rssclient";
1315 }