--- /dev/null
+/*
+ * Bring external RSS feeds into rooms.
+ *
+ * Copyright (c) 2007-2010 by the citadel.org team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <expat.h>
+#include <curl/curl.h>
+#include <libcitadel.h>
+#include "citadel.h"
+#include "server.h"
+#include "citserver.h"
+#include "support.h"
+#include "config.h"
+#include "threads.h"
+#include "ctdl_module.h"
+#include "clientsocket.h"
+#include "msgbase.h"
+#include "parsedate.h"
+#include "database.h"
+#include "citadel_dirs.h"
+#include "md5.h"
+#include "context.h"
+#include "event_client.h"
+#include "rss_atom_parser.h"
+
+HashList *StartHandlers = NULL;
+HashList *EndHandlers = NULL;
+HashList *KnownNameSpaces = NULL;
+void AddRSSStartHandler(rss_handler_func Handler, int Flags, const char *key, long len)
+{
+ rss_xml_handler *h;
+ h = (rss_xml_handler*) malloc(sizeof (rss_xml_handler));
+ h->Flags = Flags;
+ h->Handler = Handler;
+ Put(StartHandlers, key, len, h, NULL);
+}
+void AddRSSEndHandler(rss_handler_func Handler, int Flags, const char *key, long len)
+{
+ rss_xml_handler *h;
+ h = (rss_xml_handler*) malloc(sizeof (rss_xml_handler));
+ h->Flags = Flags;
+ h->Handler = Handler;
+ Put(EndHandlers, key, len, h, NULL);
+}
+
+
+
+/*
+ * Convert an RDF/RSS datestamp into a time_t
+ */
+time_t rdf_parsedate(const char *p)
+{
+ struct tm tm;
+ time_t t = 0;
+
+ if (!p) return 0L;
+ if (strlen(p) < 10) return 0L;
+
+ memset(&tm, 0, sizeof tm);
+
+ /*
+ * If the timestamp appears to be in W3C datetime format, try to
+ * parse it. See also: http://www.w3.org/TR/NOTE-datetime
+ *
+ * This code, along with parsedate.c, is a potential candidate for
+ * moving into libcitadel.
+ */
+ if ( (p[4] == '-') && (p[7] == '-') ) {
+ tm.tm_year = atoi(&p[0]) - 1900;
+ tm.tm_mon = atoi(&p[5]) - 1;
+ tm.tm_mday = atoi(&p[8]);
+ if ( (p[10] == 'T') && (p[13] == ':') ) {
+ tm.tm_hour = atoi(&p[11]);
+ tm.tm_min = atoi(&p[14]);
+ }
+ return mktime(&tm);
+ }
+
+ /* hmm... try RFC822 date stamp format */
+
+ t = parsedate(p);
+ if (t > 0) return(t);
+
+ /* yeesh. ok, just return the current date and time. */
+ return(time(NULL));
+}
+
+void flush_rss_item(rss_item *ri)
+{
+ /* Initialize the feed item data structure */
+ FreeStrBuf(&ri->guid);
+ FreeStrBuf(&ri->title);
+ FreeStrBuf(&ri->link);
+ FreeStrBuf(&ri->author_or_creator);
+ FreeStrBuf(&ri->author_email);
+ FreeStrBuf(&ri->author_url);
+ FreeStrBuf(&ri->description);
+}
+
+void rss_xml_start(void *data, const char *supplied_el, const char **attr)
+{
+ rss_xml_handler *h;
+ rsscollection *rssc = (rsscollection*) data;
+ rssnetcfg *Cfg = rssc->Cfg;
+ rss_item *ri = rssc->Item;
+ void *pv;
+ const char *pel;
+ char *sep = NULL;
+
+ /* Axe the namespace, we don't care about it */
+/// CtdlLogPrintf(0, "RSS: supplied el %d: %s...\n", rssc->Cfg->ItemType, supplied_el);
+ pel = supplied_el;
+ while (sep = strchr(pel, ':'), sep) {
+ pel = sep + 1;
+ }
+
+ if (pel != supplied_el)
+ {
+ void *v;
+
+ if (!GetHash(KnownNameSpaces,
+ supplied_el,
+ pel - supplied_el - 1,
+ &v))
+ {
+#ifdef DEBUG_RSS
+ CtdlLogPrintf(0, "RSS: START ignoring because of wrong namespace [%s] = [%s]\n",
+ supplied_el);
+#endif
+ return;
+ }
+ }
+
+ StrBufPlain(rssc->Key, pel, -1);
+ StrBufLowerCase(rssc->Key);
+ if (GetHash(StartHandlers, SKEY(rssc->Key), &pv))
+ {
+ rssc->Current = h = (rss_xml_handler*) pv;
+
+ if (((h->Flags & RSS_UNSET) != 0) &&
+ (Cfg->ItemType == RSS_UNSET))
+ {
+ h->Handler(rssc->CData, ri, Cfg, attr);
+ }
+ else if (((h->Flags & RSS_RSS) != 0) &&
+ (Cfg->ItemType == RSS_RSS))
+ {
+ h->Handler(rssc->CData, ri, Cfg, attr);
+ }
+ else if (((h->Flags & RSS_ATOM) != 0) &&
+ (Cfg->ItemType == RSS_ATOM))
+ {
+ h->Handler(rssc->CData, ri, Cfg, attr);
+ }
+#ifdef DEBUG_RSS
+ else
+ CtdlLogPrintf(0, "RSS: START unhandled: [%s] [%s]...\n", pel, supplied_el);
+#endif
+ }
+#ifdef DEBUG_RSS
+ else
+ CtdlLogPrintf(0, "RSS: START unhandled: [%s] [%s]...\n", pel, supplied_el);
+#endif
+}
+
+void rss_xml_end(void *data, const char *supplied_el)
+{
+ rss_xml_handler *h;
+ rsscollection *rssc = (rsscollection*) data;
+ rssnetcfg *Cfg = rssc->Cfg;
+ rss_item *ri = rssc->Item;
+ const char *pel;
+ char *sep = NULL;
+ void *pv;
+
+ /* Axe the namespace, we don't care about it */
+ pel = supplied_el;
+ while (sep = strchr(pel, ':'), sep) {
+ pel = sep + 1;
+ }
+// CtdlLogPrintf(0, "RSS: END %s...\n", el);
+ if (pel != supplied_el)
+ {
+ void *v;
+
+ if (!GetHash(KnownNameSpaces,
+ supplied_el,
+ pel - supplied_el - 1,
+ &v))
+ {
+#ifdef DEBUG_RSS
+ CtdlLogPrintf(0, "RSS: END ignoring because of wrong namespace [%s] = [%s]\n",
+ supplied_el, ChrPtr(rssc->CData));
+#endif
+ FlushStrBuf(rssc->CData);
+ return;
+ }
+ }
+
+ StrBufPlain(rssc->Key, pel, -1);
+ StrBufLowerCase(rssc->Key);
+ if (GetHash(EndHandlers, SKEY(rssc->Key), &pv))
+ {
+ h = (rss_xml_handler*) pv;
+
+ if (((h->Flags & RSS_UNSET) != 0) &&
+ (Cfg->ItemType == RSS_UNSET))
+ {
+ h->Handler(rssc->CData, ri, Cfg, NULL);
+ }
+ else if (((h->Flags & RSS_RSS) != 0) &&
+ (Cfg->ItemType == RSS_RSS))
+ {
+ h->Handler(rssc->CData, ri, Cfg, NULL);
+ }
+ else if (((h->Flags & RSS_ATOM) != 0) &&
+ (Cfg->ItemType == RSS_ATOM))
+ {
+ h->Handler(rssc->CData, ri, Cfg, NULL);
+ }
+#ifdef DEBUG_RSS
+ else
+ CtdlLogPrintf(0, "RSS: END unhandled: [%s] [%s] = [%s]...\n", pel, supplied_el, ChrPtr(rssc->CData));
+#endif
+ }
+#ifdef DEBUG_RSS
+ else
+ CtdlLogPrintf(0, "RSS: END unhandled: [%s] [%s] = [%s]...\n", pel, supplied_el, ChrPtr(rssc->CData));
+#endif
+ FlushStrBuf(rssc->CData);
+ rssc->Current = NULL;
+}
+
+
+
+
+
+void RSS_item_rss_start (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ CtdlLogPrintf(CTDL_DEBUG, "RSS: This is an RSS feed.\n");
+ Cfg->ItemType = RSS_RSS;
+}
+
+void RSS_item_rdf_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ CtdlLogPrintf(CTDL_DEBUG, "RSS: This is an RDF feed.\n");
+ Cfg->ItemType = RSS_RSS;
+}
+
+void ATOM_item_feed_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ CtdlLogPrintf(CTDL_DEBUG, "RSS: This is an ATOM feed.\n");
+ Cfg->ItemType = RSS_ATOM;
+}
+
+
+void RSS_item_item_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ ri->item_tag_nesting ++;
+ flush_rss_item(ri);
+}
+
+void ATOM_item_entry_start(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+/* Atom feed... */
+ ri->item_tag_nesting ++;
+ flush_rss_item(ri);
+}
+
+void ATOM_item_link_start (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ int i;
+ const char *pHref = NULL;
+ const char *pType = NULL;
+ const char *pRel = NULL;
+ const char *pTitle = NULL;
+
+ for (i = 0; Attr[i] != NULL; i+=2)
+ {
+ if (!strcmp(Attr[i], "href"))
+ {
+ pHref = Attr[i+1];
+ }
+ else if (!strcmp(Attr[i], "rel"))
+ {
+ pRel = Attr[i+1];
+ }
+ else if (!strcmp(Attr[i], "type"))
+ {
+ pType = Attr[i+1];
+ }
+ else if (!strcmp(Attr[i], "title"))
+ {
+ pTitle = Attr[i+1];
+ }
+ }
+ if (pHref == NULL)
+ return; /* WHUT? Pointing... where? */
+ if ((pType != NULL) && !strcasecmp(pType, "application/atom+xml"))
+ return; /* these just point to other rss resources, we're not interested in them. */
+ if (pRel != NULL)
+ {
+ if (!strcasecmp (pRel, "replies"))
+ {
+ NewStrBufDupAppendFlush(&ri->reLink, NULL, pHref, -1);
+ StrBufTrim(ri->link);
+ NewStrBufDupAppendFlush(&ri->reLinkTitle, NULL, pTitle, -1);
+ }
+ else if (!strcasecmp(pRel, "alternate")) /* Alternative representation of this Item... */
+ {
+ NewStrBufDupAppendFlush(&ri->link, NULL, pHref, -1);
+ StrBufTrim(ri->link);
+ NewStrBufDupAppendFlush(&ri->linkTitle, NULL, pTitle, -1);
+
+ }
+#if 0 /* these are also defined, but dunno what to do with them.. */
+ else if (!strcasecmp(pRel, "related"))
+ {
+ }
+ else if (!strcasecmp(pRel, "self"))
+ {
+ }
+ else if (!strcasecmp(pRel, "enclosure"))
+ {/* this reference can get big, and is probably the full article... */
+ }
+ else if (!strcasecmp(pRel, "via"))
+ {/* this article was provided via... */
+ }
+#endif
+ }
+ else if (StrLength(ri->link) == 0)
+ {
+ NewStrBufDupAppendFlush(&ri->link, NULL, pHref, -1);
+ StrBufTrim(ri->link);
+ NewStrBufDupAppendFlush(&ri->linkTitle, NULL, pTitle, -1);
+ }
+}
+
+
+
+
+void ATOMRSS_item_title_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if ((ri->item_tag_nesting == 0) && (StrLength(CData) > 0)) {
+ NewStrBufDupAppendFlush(&ri->channel_title, CData, NULL, 0);
+ StrBufTrim(ri->channel_title);
+ }
+}
+
+void RSS_item_guid_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->guid, CData, NULL, 0);
+ }
+}
+
+void ATOM_item_id_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->guid, CData, NULL, 0);
+ }
+}
+
+
+void RSS_item_link_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->link, CData, NULL, 0);
+ StrBufTrim(ri->link);
+ }
+}
+void RSS_item_relink_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->reLink, CData, NULL, 0);
+ StrBufTrim(ri->reLink);
+ }
+}
+
+void RSSATOM_item_title_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->title, CData, NULL, 0);
+ StrBufTrim(ri->title);
+ }
+}
+
+void ATOM_item_content_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ long olen = StrLength (ri->description);
+ long clen = StrLength (CData);
+ if (clen > 0)
+ {
+ if (olen == 0) {
+ NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
+ StrBufTrim(ri->description);
+ }
+ else if (olen < clen) {
+ FlushStrBuf(ri->description);
+ NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
+ StrBufTrim(ri->description);
+ }
+ }
+}
+void ATOM_item_summary_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ /* this can contain an abstract of the article. but we don't want to verwrite a full document if we already have it. */
+ if ((StrLength(CData) > 0) && (StrLength(ri->description) == 0))
+ {
+ NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
+ StrBufTrim(ri->description);
+ }
+}
+
+void RSS_item_description_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ long olen = StrLength (ri->description);
+ long clen = StrLength (CData);
+ if (clen > 0)
+ {
+ if (olen == 0) {
+ NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
+ StrBufTrim(ri->description);
+ }
+ else if (olen < clen) {
+ FlushStrBuf(ri->description);
+ NewStrBufDupAppendFlush(&ri->description, CData, NULL, 0);
+ StrBufTrim(ri->description);
+ }
+ }
+}
+
+void ATOM_item_published_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ StrBufTrim(CData);
+ ri->pubdate = rdf_parsedate(ChrPtr(CData));
+ }
+}
+
+void ATOM_item_updated_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ StrBufTrim(CData);
+ ri->pubdate = rdf_parsedate(ChrPtr(CData));
+ }
+}
+
+void RSS_item_pubdate_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ StrBufTrim(CData);
+ ri->pubdate = rdf_parsedate(ChrPtr(CData));
+ }
+}
+
+
+void RSS_item_date_end (StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ StrBufTrim(CData);
+ ri->pubdate = rdf_parsedate(ChrPtr(CData));
+ }
+}
+
+
+
+void RSS_item_author_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
+ StrBufTrim(ri->author_or_creator);
+ }
+}
+
+
+void ATOM_item_name_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
+ StrBufTrim(ri->author_or_creator);
+ }
+}
+
+void ATOM_item_email_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->author_email, CData, NULL, 0);
+ StrBufTrim(ri->author_email);
+ }
+}
+
+void RSS_item_creator_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if ((StrLength(CData) > 0) &&
+ (StrLength(ri->author_or_creator) == 0))
+ {
+ NewStrBufDupAppendFlush(&ri->author_or_creator, CData, NULL, 0);
+ StrBufTrim(ri->author_or_creator);
+ }
+}
+
+
+void ATOM_item_uri_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ if (StrLength(CData) > 0) {
+ NewStrBufDupAppendFlush(&ri->author_url, CData, NULL, 0);
+ StrBufTrim(ri->author_url);
+ }
+}
+
+void RSS_item_item_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ --ri->item_tag_nesting;
+ rss_save_item(ri);
+}
+
+
+void ATOM_item_entry_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+ --ri->item_tag_nesting;
+ rss_save_item(ri);
+}
+
+void RSS_item_rss_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+// CtdlLogPrintf(CTDL_DEBUG, "End of feed detected. Closing parser.\n");
+ ri->done_parsing = 1;
+
+}
+void RSS_item_rdf_end(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+// CtdlLogPrintf(CTDL_DEBUG, "End of feed detected. Closing parser.\n");
+ ri->done_parsing = 1;
+}
+
+
+void RSSATOM_item_ignore(StrBuf *CData, rss_item *ri, rssnetcfg *Cfg, const char** Attr)
+{
+}
+
+
+
+/*
+ * This callback stores up the data which appears in between tags.
+ */
+void rss_xml_cdata_start(void *data)
+{
+ rsscollection *rssc = (rsscollection*) data;
+
+ FlushStrBuf(rssc->CData);
+}
+
+void rss_xml_cdata_end(void *data)
+{
+}
+void rss_xml_chardata(void *data, const XML_Char *s, int len)
+{
+ rsscollection *rssc = (rsscollection*) data;
+
+ StrBufAppendBufPlain (rssc->CData, s, len, 0);
+}
+
+/*
+ * Callback function for passing libcurl's output to expat for parsing
+ */
+size_t rss_libcurl_callback(void *ptr, size_t size, size_t nmemb, void *stream)
+{
+ XML_Parse((XML_Parser)stream, ptr, (size * nmemb), 0);
+ return (size*nmemb);
+}
+
+
+
+eNextState ParseRSSReply(AsyncIO *IO)
+{
+ rsscollection *rssc;
+ rss_item *ri;
+ const char *at;
+ char *ptr;
+ long len;
+
+ rssc = IO->Data;
+ ri = rssc->Item;
+ rssc->CData = NewStrBufPlain(NULL, SIZ);
+ rssc->Key = NewStrBuf();
+ at = NULL;
+ StrBufSipLine(rssc->Key, IO->HttpReq.ReplyData, &at);
+ ptr = NULL;
+
+#define encoding "encoding=\""
+ ptr = strstr(ChrPtr(rssc->Key), encoding);
+ if (ptr != NULL)
+ {
+ char *pche;
+
+ ptr += sizeof (encoding) - 1;
+ pche = strchr(ptr, '"');
+ if (pche != NULL)
+ StrBufCutAt(rssc->Key, -1, pche);
+ else
+ ptr = "UTF-8";
+ }
+ else
+ ptr = "UTF-8";
+
+
+ rssc->xp = XML_ParserCreateNS(ptr, ':');
+ if (!rssc->xp) {
+ CtdlLogPrintf(CTDL_ALERT, "Cannot create XML parser!\n");
+ goto shutdown;
+ }
+ FlushStrBuf(rssc->Key);
+
+ XML_SetElementHandler(rssc->xp, rss_xml_start, rss_xml_end);
+ XML_SetCharacterDataHandler(rssc->xp, rss_xml_chardata);
+ XML_SetUserData(rssc->xp, &rssc);
+ XML_SetCdataSectionHandler(rssc->xp,
+ rss_xml_cdata_start,
+ rss_xml_cdata_end);
+
+
+ len = StrLength(IO->HttpReq.ReplyData);
+ ptr = SmashStrBuf(&IO->HttpReq.ReplyData);
+ XML_Parse(rssc->xp, ptr, len, 0);
+ free (ptr);
+ if (ri->done_parsing == 0)
+ XML_Parse(rssc->xp, "", 0, 1);
+
+
+ CtdlLogPrintf(CTDL_ALERT, "RSS: XML Status [%s] \n",
+ XML_ErrorString(
+ XML_GetErrorCode(rssc->xp)));
+
+shutdown:
+ XML_ParserFree(rssc->xp);
+
+ flush_rss_item(ri);
+ FreeStrBuf(&rssc->CData);
+ FreeStrBuf(&rssc->Key);
+
+ ///Cfg->next_poll = time(NULL) + config.c_net_freq;
+
+ return eTerminateConnection;
+}
+
+
+void rss_cleanup(void)
+{
+ DeleteHash(&StartHandlers);
+ DeleteHash(&EndHandlers);
+ DeleteHash(&KnownNameSpaces);
+}
+
+
+CTDL_MODULE_INIT(rssparser)
+{
+ if (!threading)
+ {
+ StartHandlers = NewHash(1, NULL);
+ EndHandlers = NewHash(1, NULL);
+
+ AddRSSStartHandler(RSS_item_rss_start, RSS_UNSET, HKEY("rss"));
+ AddRSSStartHandler(RSS_item_rdf_start, RSS_UNSET, HKEY("rdf"));
+ AddRSSStartHandler(ATOM_item_feed_start, RSS_UNSET, HKEY("feed"));
+ AddRSSStartHandler(RSS_item_item_start, RSS_RSS, HKEY("item"));
+ AddRSSStartHandler(ATOM_item_entry_start, RSS_ATOM, HKEY("entry"));
+ AddRSSStartHandler(ATOM_item_link_start, RSS_ATOM, HKEY("link"));
+
+ AddRSSEndHandler(ATOMRSS_item_title_end, RSS_ATOM|RSS_RSS|RSS_REQUIRE_BUF, HKEY("title"));
+ AddRSSEndHandler(RSS_item_guid_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("guid"));
+ AddRSSEndHandler(ATOM_item_id_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("id"));
+ AddRSSEndHandler(RSS_item_link_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("link"));
+#if 0
+// hm, rss to the comments of that blog, might be interesting in future, but...
+ AddRSSEndHandler(RSS_item_relink_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("commentrss"));
+// comment count...
+ AddRSSEndHandler(RSS_item_relink_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("comments"));
+#endif
+ AddRSSEndHandler(RSSATOM_item_title_end, RSS_ATOM|RSS_RSS|RSS_REQUIRE_BUF, HKEY("title"));
+ AddRSSEndHandler(ATOM_item_content_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("content"));
+ AddRSSEndHandler(RSS_item_description_end, RSS_RSS|RSS_ATOM|RSS_REQUIRE_BUF, HKEY("encoded"));
+ AddRSSEndHandler(ATOM_item_summary_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("summary"));
+ AddRSSEndHandler(RSS_item_description_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("description"));
+ AddRSSEndHandler(ATOM_item_published_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("published"));
+ AddRSSEndHandler(ATOM_item_updated_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("updated"));
+ AddRSSEndHandler(RSS_item_pubdate_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("pubdate"));
+ AddRSSEndHandler(RSS_item_date_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("date"));
+ AddRSSEndHandler(RSS_item_author_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("author"));
+ AddRSSEndHandler(RSS_item_creator_end, RSS_RSS|RSS_REQUIRE_BUF, HKEY("creator"));
+/* <author> */
+ AddRSSEndHandler(ATOM_item_email_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("email"));
+ AddRSSEndHandler(ATOM_item_name_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("name"));
+ AddRSSEndHandler(ATOM_item_uri_end, RSS_ATOM|RSS_REQUIRE_BUF, HKEY("uri"));
+/* </author> */
+ AddRSSEndHandler(RSS_item_item_end, RSS_RSS, HKEY("item"));
+ AddRSSEndHandler(RSS_item_rss_end, RSS_RSS, HKEY("rss"));
+ AddRSSEndHandler(RSS_item_rdf_end, RSS_RSS, HKEY("rdf"));
+ AddRSSEndHandler(ATOM_item_entry_end, RSS_ATOM, HKEY("entry"));
+
+
+/* at the start of atoms: <seq> <li>link to resource</li></seq> ignore them. */
+ AddRSSStartHandler(RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("seq"));
+ AddRSSEndHandler (RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("seq"));
+ AddRSSStartHandler(RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("li"));
+ AddRSSEndHandler (RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("li"));
+
+/* links to other feed generators... */
+ AddRSSStartHandler(RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("feedflare"));
+ AddRSSEndHandler (RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("feedflare"));
+ AddRSSStartHandler(RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("browserfriendly"));
+ AddRSSEndHandler (RSSATOM_item_ignore, RSS_RSS|RSS_ATOM, HKEY("browserfriendly"));
+
+ KnownNameSpaces = NewHash(1, NULL);
+ Put(KnownNameSpaces, HKEY("http://a9.com/-/spec/opensearch/1.1/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://a9.com/-/spec/opensearchrss/1.0/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://backend.userland.com/creativeCommonsRssModule"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/atom/ns#"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/dc/elements/1.1/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/content/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/slash/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/modules/syndication/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/rss/1.0/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://purl.org/syndication/thread/1.0"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://rssnamespace.org/feedburner/ext/1.0"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://schemas.google.com/g/2005"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://webns.net/mvcb/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://web.resource.org/cc/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://wellformedweb.org/CommentAPI/"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://www.georss.org/georss"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/xhtml"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/02/22-rdf-syntax-ns#"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://www.w3.org/1999/02/22-rdf-syntax-ns#"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://www.w3.org/2003/01/geo/wgs84_pos#"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("http://www.w3.org/2005/Atom"), NULL, reference_free_handler);
+ Put(KnownNameSpaces, HKEY("urn:flickr:"), NULL, reference_free_handler);
+#if 0
+ /* we don't like these namespaces because of they shadow our usefull parameters. */
+ Put(KnownNameSpaces, HKEY("http://search.yahoo.com/mrss/"), NULL, reference_free_handler);
+#endif
+ CtdlRegisterCleanupHook(rss_cleanup);
+ }
+ return "rssparser";
+}
--- /dev/null
+/*
+ *
+ * Copyright (c) 1998-2009 by the citadel.org team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "sysdep.h"
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <pwd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <syslog.h>
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+#include <sys/wait.h>
+#include <ctype.h>
+#include <string.h>
+#include <limits.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <assert.h>
+
+#include <libcitadel.h>
+#include "citadel.h"
+#include "server.h"
+#include "citserver.h"
+#include "support.h"
+#include "config.h"
+#include "control.h"
+#include "user_ops.h"
+#include "database.h"
+#include "msgbase.h"
+#include "internet_addressing.h"
+#include "genstamp.h"
+#include "domain.h"
+#include "ctdl_module.h"
+#include "locate_host.h"
+#include "citadel_dirs.h"
+
+#include "event_client.h"
+
+HashList *UrlShorteners = NULL;
+
+size_t GetLocationString( void *ptr, size_t size, size_t nmemb, void *userdata)
+{
+#define LOCATION "location"
+ if (strncasecmp((char*)ptr, LOCATION, sizeof(LOCATION) - 1) == 0)
+ {
+ StrBuf *pURL = (StrBuf*) userdata;
+ char *pch = (char*) ptr;
+ char *pche;
+
+ pche = pch + (size * nmemb);
+ pch += sizeof(LOCATION);
+
+ while (isspace(*pch) || (*pch == ':'))
+ pch ++;
+
+ while (isspace(*pche) || (*pche == '\0'))
+ pche--;
+
+ FlushStrBuf(pURL);
+ StrBufPlain(pURL, pch, pche - pch + 1);
+ }
+ return size * nmemb;
+}
+
+
+eNextState LookupUrlResult(AsyncIO *IO)
+{
+ return eTerminateConnection; /// /TODO
+}
+
+int LookupUrl(StrBuf *ShorterUrlStr)
+{
+ CURLcode sta;
+ int rc = 0;
+ CURL *chnd;
+ AsyncIO *IO;
+
+
+ IO = (AsyncIO*) malloc(sizeof(AsyncIO));
+ memset(IO, 0, sizeof(AsyncIO));
+ IO->CitContext = CloneContext(CC);
+
+ ParseURL(&IO->ConnectMe, ShorterUrlStr, 80);
+ CurlPrepareURL(IO->ConnectMe);
+
+ if (! evcurl_init(IO,
+// Ctx,
+ NULL,
+ "Citadel RSS ShorterURL Expander",
+ LookupUrlResult))
+ {
+ CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
+ goto shutdown;
+ }
+ chnd = IO->HttpReq.chnd;
+
+ OPT(SSL_VERIFYPEER, 0);
+ OPT(SSL_VERIFYHOST, 0);
+ OPT(FOLLOWLOCATION, 10);
+#ifdef CURLOPT_HTTP_CONTENT_DECODING
+ OPT(HTTP_CONTENT_DECODING, 1);
+ OPT(ENCODING, "");
+#endif
+ OPT(HEADERFUNCTION , GetLocationString);
+ OPT(WRITEHEADER, ShorterUrlStr);
+
+
+ if (CtdlThreadCheckStop())
+ goto shutdown ;
+
+ evcurl_handle_start(IO);
+
+shutdown:
+
+ return rc;
+
+}
+
+
+
+void CrawlMessageForShorterUrls(HashList *pUrls, StrBuf *Message)
+{
+ int nHits = 0;
+ void *pv;
+ int nShorter = 0;
+ const char *pch;
+ const char *pUrl;
+ ConstStr *pCUrl;
+
+ while (GetHash(UrlShorteners, IKEY(nShorter), &pv))
+ {
+ nShorter++;
+ pch = ChrPtr(Message);
+ pUrl = strstr(pch, ChrPtr((StrBuf*)pv));
+ while ((pUrl != NULL) && (nHits < 99))
+ {
+ pCUrl = malloc(sizeof(ConstStr));
+
+ pCUrl->Key = pUrl;
+ pch = pUrl + StrLength((StrBuf*)pv);
+ while (isalnum(*pch)||(*pch == '-')||(*pch == '/'))
+ pch++;
+ pCUrl->len = pch - pCUrl->Key;
+
+ Put(pUrls, IKEY(nHits), pCUrl, NULL);
+ nHits ++;
+ pUrl = strstr(pch, ChrPtr((StrBuf*)pv));
+ }
+ }
+}
+
+int SortConstStrByPosition(const void *Item1, const void *Item2)
+{
+ const ConstStr *p1, *p2;
+ p1 = (const ConstStr*) Item1;
+ p2 = (const ConstStr*) Item2;
+ if (p1->Key == p2->Key)
+ return 0;
+ if (p1->Key > p2->Key)
+ return 1;
+ return -1;
+}
+
+void ExpandShortUrls(StrBuf *Message)
+{
+ StrBuf *Shadow;
+ HashList *pUrls;
+ ConstStr *pCUrl;
+ const char *pch;
+ const char *pche;
+
+ /* we just suspect URL shorteners to be inside of feeds from twitter
+ * or other short content messages, so don't crawl through real blogs.
+ */
+ if (StrLength(Message) > 500)
+ return;
+
+ pUrls = NewHash(1, Flathash);
+ CrawlMessageForShorterUrls(pUrls, Message);
+
+ if (GetCount(pUrls) > 0)
+ {
+ StrBuf *ShorterUrlStr;
+ HashPos *Pos;
+ const char *Key;
+ void *pv;
+ long len;
+
+ Shadow = NewStrBufPlain(NULL, StrLength(Message));
+ SortByPayload (pUrls, SortConstStrByPosition);
+
+ ShorterUrlStr = NewStrBufPlain(NULL, StrLength(Message));
+
+ pch = ChrPtr(Message);
+ pche = pch + StrLength(Message);
+ Pos = GetNewHashPos(pUrls, 1);
+ while (GetNextHashPos(pUrls, Pos, &len, &Key, &pv))
+ {
+ pCUrl = (ConstStr*) pv;
+
+ if (pch != pCUrl->Key)
+ StrBufAppendBufPlain(Shadow, pch, pCUrl->Key - pch, 0);
+
+ StrBufPlain(ShorterUrlStr, CKEY(*pCUrl));
+ if (LookupUrl(ShorterUrlStr))
+ {
+ StrBufAppendBufPlain(Shadow, HKEY("<a href=\""), 0);
+ StrBufAppendBuf(Shadow, ShorterUrlStr, 0);
+ StrBufAppendBufPlain(Shadow, HKEY("\">"), 0);
+ StrBufAppendBuf(Shadow, ShorterUrlStr, 0);
+ StrBufAppendBufPlain(Shadow, HKEY("["), 0);
+ StrBufAppendBufPlain(Shadow, pCUrl->Key, pCUrl->len, 0);
+ StrBufAppendBufPlain(Shadow, HKEY("]</a>"), 0);
+ }
+ else
+ {
+ StrBufAppendBufPlain(Shadow, HKEY("<a href=\""), 0);
+ StrBufAppendBufPlain(Shadow, pCUrl->Key, pCUrl->len, 0);
+ StrBufAppendBufPlain(Shadow, HKEY("\">"), 0);
+ StrBufAppendBufPlain(Shadow, pCUrl->Key, pCUrl->len, 0);
+ StrBufAppendBufPlain(Shadow, HKEY("</a>"), 0);
+ }
+ pch = pCUrl->Key + pCUrl->len + 1;
+
+ }
+ if (pch < pche)
+ StrBufAppendBufPlain(Shadow, pch, pche - pch, 0);
+ FlushStrBuf(Message);
+ StrBufAppendBuf(Message, Shadow, 0);
+
+ FreeStrBuf(&ShorterUrlStr);
+ FreeStrBuf(&Shadow);
+ DeleteHashPos(&Pos);
+ }
+
+ DeleteHash(&pUrls);
+}
+
+void LoadUrlShorteners(void)
+{
+ int i = 0;
+ int fd;
+ const char *POS = NULL;
+ const char *Err = NULL;
+ StrBuf *Content, *Line;
+
+
+ UrlShorteners = NewHash(0, Flathash);
+
+ fd = open(file_citadel_urlshorteners, 0);
+
+ if (fd != 0)
+ {
+ Content = NewStrBufPlain(NULL, SIZ);
+ Line = NewStrBuf();
+ while (POS != StrBufNOTNULL)
+ {
+ StrBufTCP_read_buffered_line_fast (Line, Content, &POS, &fd, 1, 1, &Err);
+ StrBufTrim(Line);
+ if ((*ChrPtr(Line) != '#') && (StrLength(Line) > 0))
+ {
+ Put(UrlShorteners, IKEY(i), Line, HFreeStrBuf);
+ i++;
+ Line = NewStrBuf();
+ }
+ else
+ FlushStrBuf(Line);
+ if (POS == NULL)
+ POS = StrBufNOTNULL;
+ }
+ FreeStrBuf(&Line);
+ FreeStrBuf(&Content);
+ }
+ close(fd);
+}
+
+void shorter_url_cleanup(void)
+{
+ DeleteHash(&UrlShorteners);
+}
+
+
+CTDL_MODULE_INIT(urldeshortener)
+{
+ if (threading)
+ {
+ CtdlLogPrintf(CTDL_INFO, "%s\n", curl_version());
+ }
+ else
+ {
+ LoadUrlShorteners ();
+ CtdlRegisterCleanupHook(shorter_url_cleanup);
+ }
+ return "UrlShortener";
+}
projects / citadel.git / commitdiff