X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=webcit%2Ffeed_generator.c;h=00bc5074f6f31ada34ffe77cdf44066bb25a58ad;hb=HEAD;hp=e7bcaa2ebee9c5db63d36ddb74687518c0d85396;hpb=38654157de673b1d9e1d6d87f7db4e226cdef273;p=citadel.git

diff --git a/webcit/feed_generator.c b/webcit/feed_generator.c
index e7bcaa2eb..119001bd8 100644
--- a/webcit/feed_generator.c
+++ b/webcit/feed_generator.c
@@ -1,80 +1,200 @@
 /*
- * RSS/Atom feed generator
+ * RSS feed generator (could be adapted in the future to feed both RSS and Atom)
  *
- * Copyright (c) 2010 by the citadel.org team
+ * Copyright (c) 2010-2012 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 open source software.  You can redistribute it and/or
+ * modify it under the terms of the GNU General Public License, version 3.
  *
  * 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 "webcit.h"
-#include "webserver.h"
 
 
 /*
  * RSS feed generator -- do one message
  */
 void feed_rss_one_message(long msgnum) {
-	wc_printf("<item>");
-	wc_printf("<title>title %ld title</title>", msgnum);
-	wc_printf("<pubDate>Wed, 08 Sep 2010 20:03:21 GMT</pubDate>");
-	wc_printf("<link>http://xxxxx.xxxx.xxxxxx.xxxx.xxx</link>");
-	wc_printf("<description>&#60;b&#62;foo bar baz:&#60;/b&#62; message %ld</description>", msgnum);
-	wc_printf("<guid>xxxx-xxxx-xxxx-xxxx-xxxx-xxxx</guid>");
-	wc_printf("</item>");
+	int in_body = 0;
+	int in_messagetext = 0;
+	int found_title = 0;
+	int found_guid = 0;
+	char pubdate[128];
+	StrBuf *messagetext = NULL;
+	int is_top_level_post = 1;
+	const char *BufPtr = NULL;
+	StrBuf *Line = NewStrBufPlain(NULL, 1024);
+	char buf[1024];
+	int permalink_hash = 0;
+
+	/* Phase 1: read the message into memory */
+	serv_printf("MSG4 %ld", msgnum);
+	serv_getln(buf, sizeof buf);
+	if (buf[0] != '1') return;
+	StrBuf *ServerResponse = NewStrBuf();
+	while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
+		StrBufAppendPrintf(ServerResponse, "%s\n", buf);
+	}
+
+	/* Phase 2: help SkyNet become self-aware */
+	BufPtr = NULL;
+	while (StrBufSipLine(Line, ServerResponse, &BufPtr), ((BufPtr!=StrBufNOTNULL)&&(BufPtr!=NULL)) ) {
+		if (in_body) {
+			/* do nothing */
+		}
+		else if (StrLength(Line) == 0) {
+			++in_body;
+		}
+		else if ((StrLength(Line) > 5) && (!strncasecmp(ChrPtr(Line), "wefw=", 5))) {
+			is_top_level_post = 0;	/* presence of references means it's a reply/comment */
+		}
+		else if ((StrLength(Line) > 5) && (!strncasecmp(ChrPtr(Line), "msgn=", 5))) {
+			StrBufCutLeft(Line, 5);
+			permalink_hash = ThreadIdHash(Line);
+		}
+	}
+
+	/*
+	 * Phase 3: output the message in RSS <item> form
+	 * (suppress replies [comments] if this is a blog room)
+	 */
+	if ( (WC->CurRoom.view != VIEW_BLOG) || (is_top_level_post == 1) ) {
+		wc_printf("<item>");
+		wc_printf("<link>%s/readfwd?go=", ChrPtr(site_prefix));
+		urlescputs(ChrPtr(WC->CurRoom.name));
+		if ((WC->CurRoom.view == VIEW_BLOG) && (permalink_hash != 0)) {
+			wc_printf("?p=%d", permalink_hash);
+		}
+		else {
+			wc_printf("?start_reading_at=%ld", msgnum);
+		}
+		wc_printf("</link>");
+	
+		BufPtr = NULL;
+		in_body = 0;
+		in_messagetext = 0;
+		while (StrBufSipLine(Line, ServerResponse, &BufPtr), ((BufPtr!=StrBufNOTNULL)&&(BufPtr!=NULL)) ) {
+			safestrncpy(buf, ChrPtr(Line), sizeof buf);
+
+			/* XML parsers can be picky; strip out nonprintable header characters */
+			if ((strlen(buf)>=6) && (buf[4]=='=')) {
+				char *p = &buf[5];
+				while (*p) {
+					if (!isprint(*p)) {
+						*p = 0;
+					}
+					++p;
+				}
+			}
+
+			/* Now output fields */
+			if (in_body) {
+				if (in_messagetext) {
+					StrBufAppendBufPlain(messagetext, buf, -1, 0);
+					StrBufAppendBufPlain(messagetext, HKEY("\r\n"), 0);
+				}
+				else if (IsEmptyStr(buf)) {
+					in_messagetext = 1;
+				}
+			}
+			else if (!strncasecmp(buf, "subj=", 5)) {
+				wc_printf("<title>");
+				escputs(&buf[5]);
+				wc_printf("</title>");
+				++found_title;
+			}
+			else if (!strncasecmp(buf, "exti=", 5)) {
+				wc_printf("<guid isPermaLink=\"false\">");
+				escputs(&buf[5]);
+				wc_printf("</guid>");
+				++found_guid;
+			}
+			else if (!strncasecmp(buf, "time=", 5)) {
+				http_datestring(pubdate, sizeof pubdate, atol(&buf[5]));
+				wc_printf("<pubDate>%s</pubDate>", pubdate);
+			}
+			else if (!strncasecmp(buf, "text", 4)) {
+				if (!found_title) {
+					wc_printf("<title>Message #%ld</title>", msgnum);
+				}
+				if (!found_guid) {
+					wc_printf("<guid isPermaLink=\"false\">%ld@%s</guid>",
+						msgnum,
+						ChrPtr(WC->serv_info->serv_humannode)
+					);
+				}
+				wc_printf("<description>");
+				in_body = 1;
+				messagetext = NewStrBuf();
+			}
+		}
+	
+		if (in_body) {
+			cdataout((char*)ChrPtr(messagetext));
+			FreeStrBuf(&messagetext);
+			wc_printf("</description>");
+		}
+
+		wc_printf("</item>");
+	}
+
+	FreeStrBuf(&Line);
+	FreeStrBuf(&ServerResponse);
+	return;
 }
 
+
 /*
  * RSS feed generator -- go through the message list
  */
 void feed_rss_do_messages(void) {
-	char buf[1024];
-	long *msgs = NULL;
+	wcsession *WCC = WC;
 	int num_msgs = 0;
-	int num_msgs_alloc = 0;
 	int i;
+	SharedMessageStatus Stat;
+	message_summary *Msg = NULL;
 
-	serv_puts("MSGS ALL");
-	serv_getln(buf, sizeof buf);
-	if (buf[0] != '1') return;
-
-	while (serv_getln(buf, sizeof buf), strcmp(buf, "000"))
-	{
-		if (num_msgs >= num_msgs_alloc) {
-			num_msgs_alloc += 1024;
-			msgs = realloc(msgs, num_msgs_alloc*sizeof(long) );
-		}
-		msgs[num_msgs++] = atol(buf);
-	}
+	memset(&Stat, 0, sizeof Stat);
+	Stat.maxload = INT_MAX;
+	Stat.lowest_found = (-1);
+	Stat.highest_found = (-1);
+	num_msgs = load_msg_ptrs("MSGS ALL", NULL, NULL, &Stat, NULL, NULL, NULL, NULL, 0);
+	if (num_msgs < 1) return;
 
-	i = num_msgs;
+	i = num_msgs;					/* convention is to feed newest-to-oldest */
 	while (i > 0) {
-		feed_rss_one_message(msgs[i-1]);
+		Msg = GetMessagePtrAt(i-1, WCC->summ);
+		if (Msg != NULL) {
+			feed_rss_one_message(Msg->msgnum);
+		}
 		--i;
 	}
+}
 
-	free(msgs);
 
+/*
+ * Output the room info file of the current room as a <description> for the channel
+ */
+void feed_rss_do_room_info_as_description(void)
+{
+	wc_printf("<description>");
+	escputs(ChrPtr(WC->CurRoom.name));	/* FIXME use the output of RINF instead */
+	wc_printf("</description>\r\n");
 }
 
+
 /*
  * Entry point for RSS feed generator
  */
 void feed_rss(void) {
+	char buf[1024];
 
-	output_headers(0, 0, 0, 1, 1, 0);
-	hprintf("Content-type: text/xml\r\n");
+	output_headers(0, 0, 0, 0, 1, 0);
+	hprintf("Content-type: text/xml; charset=utf-8\r\n");
 	hprintf(
 		"Server: %s / %s\r\n"
 		"Connection: close\r\n"
@@ -84,7 +204,7 @@ void feed_rss(void) {
 	begin_burst();
 
 	wc_printf("<?xml version=\"1.0\"?>"
-		"<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">"
+		"<rss version=\"2.0\">"
 		"<channel>"
 	);
 
@@ -93,19 +213,31 @@ void feed_rss(void) {
 	wc_printf("</title>");
 
 	wc_printf("<link>");
-	urlescputs(ChrPtr(site_prefix));
-	wc_printf("</link>");
+	escputs(ChrPtr(site_prefix));
+	wc_printf("/</link>");
 
-	//	<language>en-us</language>
-	//	<description>Linux Today News Service</description>
-	//	<atom:link href="http://linuxtoday.com/biglt.rss" rel="self" type="application/rss+xml" />
+	serv_puts("RINF");
+	serv_getln(buf, sizeof buf);
+	if (buf[0] == '1') {
+		wc_printf("<description>\r\n");
+		while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
+			escputs(buf);
+			wc_printf("\r\n");
+		}
+		wc_printf("</description>");
+	}
 
-	//    <image>
-	//      <title>Linux Today</title>
-	//      <url>http://linuxtoday.com/pics/ltnet.png</url>
-	//      <link>http://linuxtoday.com</link>
-	//    </image>
+	wc_printf("<image><title>");
+	escputs(ChrPtr(WC->CurRoom.name));
+	wc_printf("</title><url>");
+	escputs(ChrPtr(site_prefix));
+	wc_printf("/roompic?room=");
+	urlescputs(ChrPtr(WC->CurRoom.name));
+	wc_printf("</url><link>");
+	escputs(ChrPtr(site_prefix));
+	wc_printf("/</link></image>\r\n");
 
+	feed_rss_do_room_info_as_description();
 	feed_rss_do_messages();
 
 	wc_printf("</channel>"
@@ -114,7 +246,41 @@ void feed_rss(void) {
 	);
 
 	wDumpContent(0);
-	end_webcit_session();
+}
+
+
+/*
+ * Offer the RSS feed meta tag for this room
+ */
+void tmplput_rssmeta(StrBuf *Target, WCTemplputParams *TP) 
+{
+	wcsession *WCC = WC;
+	char feed_link[1024];
+
+	strcpy(feed_link, "/feed_rss?go=");
+	urlesc(&feed_link[20], sizeof(feed_link) - 20, (char *)ChrPtr(WCC->CurRoom.name) );
+	StrBufAppendPrintf(Target,
+		"<link rel=\"alternate\" title=\"RSS\" href=\"%s\" type=\"application/rss+xml\">",
+		feed_link
+	);
+}
+
+
+/*
+ * Offer the RSS feed button for this room
+ */
+void tmplput_rssbutton(StrBuf *Target, WCTemplputParams *TP) 
+{
+	StrBuf *FeedLink = NULL;
+
+	FeedLink = NewStrBufPlain(HKEY("/feed_rss?go="));
+	StrBufUrlescAppend(FeedLink, WC->CurRoom.name, NULL);
+
+	StrBufAppendPrintf(Target, "<a type=\"application/rss+xml\" href=\"");
+	StrBufAppendBuf(Target, FeedLink, 0);
+	StrBufAppendPrintf(Target, "\"><img src=\"static/webcit_icons/essen/16x16/rss.png\" alt=\"RSS\">");
+	StrBufAppendPrintf(Target, "</a>");
+	FreeStrBuf(&FeedLink);
 }
 
 
@@ -122,5 +288,7 @@ void
 InitModule_RSS
 (void)
 {
-	WebcitAddUrlHandler(HKEY("feed_rss"), "", 0, feed_rss, ANONYMOUS|COOKIEUNNEEDED|FORCE_SESSIONCLOSE);
+	WebcitAddUrlHandler(HKEY("feed_rss"), "", 0, feed_rss, ANONYMOUS|COOKIEUNNEEDED);
+	RegisterNamespace("THISROOM:FEED:RSS", 0, 0, tmplput_rssbutton, NULL, CTX_NONE);
+	RegisterNamespace("THISROOM:FEED:RSSMETA", 0, 0, tmplput_rssmeta, NULL, CTX_NONE);
 }