2 * RSS feed generator (could be adapted in the future to feed both RSS and Atom)
4 * Copyright (c) 2010-2011 by the citadel.org team
6 * This program is open source software. You can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 3 of the
9 * License, or (at your option) any later version.
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.
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
22 #include "webserver.h"
26 * RSS feed generator -- do one message
28 void feed_rss_one_message(long msgnum) {
30 int in_messagetext = 0;
34 StrBuf *messagetext = NULL;
35 int is_top_level_post = 1;
36 const char *BufPtr = NULL;
37 StrBuf *Line = NewStrBufPlain(NULL, 1024);
39 int permalink_hash = 0;
41 /* Phase 1: read the message into memory */
42 serv_printf("MSG4 %ld", msgnum);
43 serv_getln(buf, sizeof buf);
44 if (buf[0] != '1') return;
45 StrBuf *ServerResponse = NewStrBuf();
46 while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
47 StrBufAppendPrintf(ServerResponse, "%s\n", buf);
50 /* Phase 2: help SkyNet become self-aware */
52 while (StrBufSipLine(Line, ServerResponse, &BufPtr), ((BufPtr!=StrBufNOTNULL)&&(BufPtr!=NULL)) ) {
56 else if (StrLength(Line) == 0) {
59 else if ((StrLength(Line) > 5) && (!strncasecmp(ChrPtr(Line), "wefw=", 5))) {
60 is_top_level_post = 0; /* presence of references means it's a reply/comment */
62 else if ((StrLength(Line) > 5) && (!strncasecmp(ChrPtr(Line), "msgn=", 5))) {
63 StrBufCutLeft(Line, 5);
64 permalink_hash = ThreadIdHash(Line);
69 * Phase 3: output the message in RSS <item> form
70 * (suppress replies [comments] if this is a blog room)
72 if ( (WC->CurRoom.view != VIEW_BLOG) || (is_top_level_post == 1) ) {
74 wc_printf("<link>%s/readfwd?go=", ChrPtr(site_prefix));
75 urlescputs(ChrPtr(WC->CurRoom.name));
76 if ((WC->CurRoom.view == VIEW_BLOG) && (permalink_hash != 0)) {
77 wc_printf("?p=%d", permalink_hash);
80 wc_printf("?start_reading_at=%ld", msgnum);
87 while (StrBufSipLine(Line, ServerResponse, &BufPtr), ((BufPtr!=StrBufNOTNULL)&&(BufPtr!=NULL)) ) {
88 safestrncpy(buf, ChrPtr(Line), sizeof buf);
91 StrBufAppendBufPlain(messagetext, buf, -1, 0);
92 StrBufAppendBufPlain(messagetext, HKEY("\r\n"), 0);
94 else if (IsEmptyStr(buf)) {
98 else if (!strncasecmp(buf, "subj=", 5)) {
101 wc_printf("</title>");
104 else if (!strncasecmp(buf, "exti=", 5)) {
105 wc_printf("<guid isPermaLink=\"false\">");
107 wc_printf("</guid>");
110 else if (!strncasecmp(buf, "time=", 5)) {
111 http_datestring(pubdate, sizeof pubdate, atol(&buf[5]));
112 wc_printf("<pubDate>%s</pubDate>", pubdate);
114 else if (!strncasecmp(buf, "text", 4)) {
116 wc_printf("<title>Message #%ld</title>", msgnum);
119 wc_printf("<guid isPermaLink=\"false\">%ld@%s</guid>",
121 ChrPtr(WC->serv_info->serv_humannode)
124 wc_printf("<description>");
126 messagetext = NewStrBuf();
131 cdataout((char*)ChrPtr(messagetext));
132 FreeStrBuf(&messagetext);
133 wc_printf("</description>");
136 wc_printf("</item>");
140 FreeStrBuf(&ServerResponse);
145 * RSS feed generator -- go through the message list
147 void feed_rss_do_messages(void) {
151 SharedMessageStatus Stat;
152 message_summary *Msg = NULL;
154 memset(&Stat, 0, sizeof Stat);
155 Stat.maxload = INT_MAX;
156 Stat.lowest_found = (-1);
157 Stat.highest_found = (-1);
158 num_msgs = load_msg_ptrs("MSGS ALL", &Stat, NULL);
159 if (num_msgs < 1) return;
161 i = num_msgs; /* convention is to feed newest-to-oldest */
163 Msg = GetMessagePtrAt(i-1, WCC->summ);
165 feed_rss_one_message(Msg->msgnum);
173 * Output the room info file of the current room as a <description> for the channel
175 void feed_rss_do_room_info_as_description(void)
177 wc_printf("<description>");
178 escputs(ChrPtr(WC->CurRoom.name)); /* FIXME use the output of RINF instead */
179 wc_printf("</description>\r\n");
184 * Entry point for RSS feed generator
186 void feed_rss(void) {
189 output_headers(0, 0, 0, 0, 1, 0);
190 hprintf("Content-type: text/xml; charset=utf-8\r\n");
192 "Server: %s / %s\r\n"
193 "Connection: close\r\n"
195 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
199 wc_printf("<?xml version=\"1.0\"?>"
200 "<rss version=\"2.0\">"
204 wc_printf("<title>");
205 escputs(ChrPtr(WC->CurRoom.name));
206 wc_printf("</title>");
209 escputs(ChrPtr(site_prefix));
210 wc_printf("/</link>");
213 serv_getln(buf, sizeof buf);
215 wc_printf("<description>\r\n");
216 while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
220 wc_printf("</description>");
223 wc_printf("<image><title>");
224 escputs(ChrPtr(WC->CurRoom.name));
225 wc_printf("</title><url>");
226 escputs(ChrPtr(site_prefix));
227 wc_printf("/image?name=_roompic_?go=");
228 urlescputs(ChrPtr(WC->CurRoom.name));
229 wc_printf("</url><link>");
230 escputs(ChrPtr(site_prefix));
231 wc_printf("/</link></image>\r\n");
233 feed_rss_do_room_info_as_description();
234 feed_rss_do_messages();
236 wc_printf("</channel>"
246 * Offer the RSS feed meta tag for this room
248 void tmplput_rssmeta(StrBuf *Target, WCTemplputParams *TP)
251 char feed_link[1024];
252 char encoded_link[1024];
254 strcpy(feed_link, "/feed_rss?go=");
255 urlesc(&feed_link[20], sizeof(feed_link) - 20, (char *)ChrPtr(WCC->CurRoom.name) );
256 CtdlEncodeBase64(encoded_link, feed_link, strlen(feed_link), 0);
258 StrBufAppendPrintf(Target,
259 "<link rel=\"alternate\" title=\"RSS\" href=\"/B64%s\" type=\"application/rss+xml\">",
266 * Offer the RSS feed button for this room
268 void tmplput_rssbutton(StrBuf *Target, WCTemplputParams *TP)
270 StrBuf *FeedLink = NULL;
272 FeedLink = NewStrBufPlain(HKEY("/feed_rss?go="));
273 StrBufUrlescAppend(FeedLink, WC->CurRoom.name, NULL);
275 StrBufAppendPrintf(Target, "<a type=\"application/rss+xml\" href=\"");
276 StrBufAppendBuf(Target, FeedLink, 0);
277 StrBufAppendPrintf(Target, "\"><img src=\"static/webcit_icons/essen/16x16/rss.png\" alt=\"RSS\">");
278 StrBufAppendPrintf(Target, "</a>");
280 FreeStrBuf(&FeedLink);
288 WebcitAddUrlHandler(HKEY("feed_rss"), "", 0, feed_rss, ANONYMOUS|COOKIEUNNEEDED);
289 RegisterNamespace("THISROOM:FEED:RSS", 0, 0, tmplput_rssbutton, NULL, CTX_NONE);
290 RegisterNamespace("THISROOM:FEED:RSSMETA", 0, 0, tmplput_rssmeta, NULL, CTX_NONE);