webcit/rss.c

   1 /*
   2  * $Id$
   3  *
   4  * Generate some RSS for our rooms.
   5  */
   6
   7 #include "webcit.h"
   8 #include "webserver.h"
   9
  10
  11 time_t if_modified_since;
  12
  13
  14 void display_rss_control(char *reply_to, char *subject)
  15 {
  16         wprintf("<div style=\"align: right;\"><p>\n");
  17         wprintf("<a href=\"/display_enter?recp=");
  18         urlescputs(reply_to);
  19         wprintf("&subject=");
  20         if (strncasecmp(subject, "Re: ", 3)) wprintf("Re:%20");
  21         urlescputs(subject);
  22         wprintf("\">[%s]</a> \n", _("Reply"));
  23         wprintf("<a href=\"/display_enter?recp=");
  24         urlescputs(reply_to);
  25         wprintf("&force_room=_MAIL_&subject=");
  26         if (strncasecmp(subject, "Re: ", 3)) wprintf("Re:%20");
  27         urlescputs(subject);
  28         wprintf("\">[%s]</a>\n", _("Email"));
  29         wprintf("</p></div>\n");
  30 }
  31
  32
  33 void display_rss(char *roomname, char *request_method)
  34 {
  35         int nummsgs;
  36         int a, b;
  37         int bq = 0;
  38         time_t now = 0L;
  39         struct tm now_tm;
  40         iconv_t ic = (iconv_t)(-1) ;
  41         char *ibuf;                   /* Buffer of characters to be converted */
  42         char *obuf;                   /* Buffer for converted characters      */
  43         size_t ibuflen;               /* Length of input buffer               */
  44         size_t obuflen;               /* Length of output buffer              */
  45         char *osav;                   /* Saved pointer to output buffer       */
  46         char buf[SIZ];
  47         char date[30];
  48         char from[256];
  49         char subj[256];
  50         char node[256];
  51         char hnod[256];
  52         char room[256];
  53         char rfca[256];
  54         char rcpt[256];
  55         char msgn[256];
  56         char content_type[256];
  57         char charset[256];
  58
  59         if (!WC->logged_in) {
  60                 authorization_required(_("Not logged in"));
  61                 return;
  62         }
  63
  64         if (gotoroom((char *)roomname)) {
  65                 lprintf(3, "RSS: Can't goto requested room\n");
  66                 wprintf("HTTP/1.1 404 Not Found\r\n");
  67                 wprintf("Content-Type: text/html\r\n");
  68                 wprintf("\r\n");
  69                 wprintf("Error retrieving RSS feed: couldn't find room\n");
  70                 return;
  71         }
  72
  73         nummsgs = load_msg_ptrs("MSGS LAST|15", 0);
  74         if (nummsgs == 0) {
  75                 lprintf(3, "RSS: No messages found\n");
  76                 wprintf("HTTP/1.1 404 Not Found\r\n");
  77                 wprintf("Content-Type: text/html\r\n");
  78                 wprintf("\r\n");
  79                 wprintf(_("Error retrieving RSS feed: couldn't find messages\n"));
  80                 return;
  81         }
  82
  83         /* Read time of last message immediately */
  84         serv_printf("MSG4 %ld", WC->msgarr[nummsgs - 1]);
  85         serv_getln(buf, sizeof buf);
  86         if (buf[0] == '1') {
  87                 while (serv_getln(buf, sizeof buf), strcasecmp(buf, "000")) {
  88                         if (!strncasecmp(buf, "msgn=", 5)) {
  89                                 strcpy(msgn, &buf[5]);
  90                         }
  91                         if (!strncasecmp(buf, "time=", 5)) {
  92                                 now = atol(&buf[5]);
  93                                 gmtime_r(&now, &now_tm);
  94                                 strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", &now_tm);
  95                         }
  96                 }
  97         }
  98
  99         if (if_modified_since > 0 && if_modified_since > now) {
 100                 lprintf(3, "RSS: Feed not updated since the last time you looked\n");
 101                 wprintf("HTTP/1.1 304 Not Modified\r\n");
 102                 wprintf("Last-Modified: %s\r\n", date);
 103                 now = time(NULL);
 104                 gmtime_r(&now, &now_tm);
 105                 strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", &now_tm);
 106                 wprintf("Date: %s\r\n", date);
 107 /*              if (*msgn) wprintf("ETag: %s\r\n\r\n", msgn); */
 108                 wDumpContent(0);
 109                 return;
 110         }
 111
 112         /* Do RSS header */
 113         lprintf(3, "RSS: Yum yum! This feed is tasty!\n");
 114         wprintf("HTTP/1.1 200 OK\r\n");
 115         wprintf("Last-Modified: %s\r\n", date);
 116 /*      if (*msgn) wprintf("ETag: %s\r\n\r\n", msgn); */
 117         wprintf("Content-Type: application/rss+xml\r\n");
 118         wprintf("$erver: %s\r\n", SERVER);
 119         wprintf("Connection: close\r\n");
 120         wprintf("\r\n");
 121         if (!strcasecmp(request_method, "HEAD"))
 122                 return;
 123
 124         wprintf("<?xml version=\"1.0\"?>\n");
 125         wprintf("<rss version=\"2.0\">\n");
 126         wprintf("   <channel>\n");
 127         wprintf("   <title>%s - %s</title>\n", WC->wc_roomname, serv_info.serv_humannode);
 128         wprintf("   <link>%s://%s:%d/dotgoto?room=", (is_https ? "https" : "http"), WC->http_host, PORT_NUM);
 129         escputs(roomname);
 130         wprintf("</link>\n");
 131         wprintf("   <description>");
 132         /* Get room info for description */
 133         serv_puts("RINF");
 134         serv_getln(buf, sizeof buf);
 135         if (buf[0] == '1') {
 136                 while (1) {
 137                         serv_getln(buf, sizeof buf);
 138                         if (!strcmp(buf, "000"))
 139                                 break;
 140                         wprintf("%s\n", buf);
 141                 }
 142         }
 143         wprintf("</description>\n");
 144         if (now) {
 145                 wprintf("   <pubDate>%s</pubDate>\n", date);
 146         }
 147         wprintf("   <generator>%s</generator>\n", SERVER);
 148         wprintf("   <docs>http://blogs.law.harvard.edu/tech/rss</docs>\n");
 149         wprintf("   <ttl>30</ttl>\n");
 150
 151         /* Read all messages and output as RSS items */
 152         for (a = 0; a < nummsgs; ++a) {
 153                 /* Read message and output each as RSS item */
 154                 serv_printf("MSG4 %ld", WC->msgarr[a]);
 155                 serv_getln(buf, sizeof buf);
 156                 if (buf[0] != '1') continue;
 157
 158                 now = 0L;
 159                 strcpy(subj, "");
 160                 strcpy(hnod, "");
 161                 strcpy(node, "");
 162                 strcpy(room, "");
 163                 strcpy(rfca, "");
 164                 strcpy(rcpt, "");
 165                 strcpy(msgn, "");
 166
 167                 while (serv_getln(buf, sizeof buf), strcasecmp(buf, "text")) {
 168                         if (!strcmp(buf, "000")) {
 169                                 goto ENDITEM;   /* screw it */
 170                         } else if (!strncasecmp(buf, "from=", 5)) {
 171                                 strcpy(from, &buf[5]);
 172 #ifdef HAVE_ICONV
 173                                 utf8ify_rfc822_string(from);
 174 #endif
 175                         } else if (!strncasecmp(buf, "subj=", 5)) {
 176                                 strcpy(subj, &buf[5]);
 177 #ifdef HAVE_ICONV
 178                                 utf8ify_rfc822_string(subj);
 179 #endif
 180                         } else if (!strncasecmp(buf, "hnod=", 5)) {
 181                                 strcpy(node, &buf[5]);
 182                         } else if (!strncasecmp(buf, "room=", 5)) {
 183                                 strcpy(room, &buf[5]);
 184                         } else if (!strncasecmp(buf, "rfca=", 5)) {
 185                                 strcpy(rfca, &buf[5]);
 186                         } else if (!strncasecmp(buf, "rcpt=", 5)) {
 187                                 strcpy(rcpt, &buf[5]);
 188                         } else if (!strncasecmp(buf, "msgn=", 5)) {
 189                                 strcpy(msgn, &buf[5]);
 190                         } else if (!strncasecmp(buf, "time=", 5)) {
 191                                 now = atol(&buf[5]);
 192                                 gmtime_r(&now, &now_tm);
 193                                 strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", &now_tm);
 194                         }
 195                 }
 196                 wprintf("   <item>\n");
 197                 if (subj[0]) {
 198                         wprintf("      <title>%s from", subj);
 199                 } else {
 200                         wprintf("      <title>From");
 201                 }
 202                 wprintf(" %s", from);
 203                 wprintf(" in %s", room);
 204                 if (strcmp(hnod, serv_info.serv_humannode) && strlen(hnod) > 0) {
 205                         wprintf(" on %s", hnod);
 206                 }
 207                 wprintf("</title>\n");
 208                 if (now) {
 209                         wprintf("      <pubDate>%s</pubDate>\n", date);
 210                 }
 211                 wprintf("      <guid isPermaLink=\"false\">%s</guid>\n", msgn);
 212                 /* Now the hard part, the message itself */
 213                 strcpy(content_type, "text/plain");
 214                 while (serv_getln(buf, sizeof buf), strlen(buf) > 0) {
 215                         if (!strcmp(buf, "000")) {
 216                                 goto ENDBODY;
 217                         }
 218                         if (!strncasecmp(buf, "Content-type: ", 14)) {
 219                                 safestrncpy(content_type, &buf[14], sizeof content_type);
 220                                 for (b = 0; b < strlen(content_type); ++b) {
 221                                         if (!strncasecmp(&content_type[b], "charset=", 8)) {
 222                                                 safestrncpy(charset, &content_type[b + 8], sizeof charset);
 223                                         }
 224                                 }
 225                                 for (b = 0; b < strlen(content_type); ++b) {
 226                                         if (content_type[b] == ';') {
 227                                                 content_type[b] = 0;
 228                                         }
 229                                 }
 230                         }
 231                 }
 232
 233                 /* Set up a character set conversion if we need to */
 234 #ifdef HAVE_ICONV
 235                 if (strcasecmp(charset, "us-ascii") && strcasecmp(charset, "utf-8")) {
 236                         ic = iconv_open("UTF-8", charset);
 237                         if (ic == (iconv_t)(-1)) {
 238                                 lprintf(5, "iconv_open() failed: %s\n", strerror(errno));
 239                                 goto ENDBODY;
 240                         }
 241                 }
 242 #endif
 243
 244                 /* Messages in legacy Citadel variformat get handled thusly... */
 245                 if (!strcasecmp(content_type, "text/x-citadel-variformat")) {
 246                         int intext = 0;
 247
 248                         wprintf("      <description><![CDATA[");
 249                         while (1) {
 250                                 serv_getln(buf, sizeof buf);
 251                                 if (!strcmp(buf, "000")) {
 252                                         if (bq == 1)
 253                                                 wprintf("</blockquote>");
 254                                         wprintf("\n");
 255                                         break;
 256                                 }
 257                                 if (intext == 1 && isspace(buf[0])) {
 258                                         wprintf("<br/>");
 259                                 }
 260                                 intext = 1;
 261                                 if (bq == 0 && !strncmp(buf, " >", 2)) {
 262                                         wprintf("<blockquote>");
 263                                         bq = 1;
 264                                 } else if (bq == 1 && strncmp(buf, " >", 2)) {
 265                                         wprintf("</blockquote>");
 266                                         bq = 0;
 267                                 }
 268                                 url(buf);
 269                                 escputs(buf);
 270                                 wprintf("\n");
 271                         }
 272                         display_rss_control(from, subj);
 273                         wprintf("]]></description>\n");
 274                 }
 275                 /* Boring old 80-column fixed format text gets handled this way... */
 276                 else if (!strcasecmp(content_type, "text/plain")) {
 277                         wprintf("      <description><![CDATA[");
 278                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 279                                 if (buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = 0;
 280                                 if (buf[strlen(buf)-1] == '\r') buf[strlen(buf)-1] = 0;
 281
 282 #ifdef HAVE_ICONV
 283                                 if (ic != (iconv_t)(-1) ) {
 284                                         ibuf = buf;
 285                                         ibuflen = strlen(ibuf);
 286                                         obuflen = SIZ;
 287                                         obuf = (char *) malloc(obuflen);
 288                                         osav = obuf;
 289                                         iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
 290                                         osav[SIZ-obuflen] = 0;
 291                                         safestrncpy(buf, osav, sizeof buf);
 292                                         free(osav);
 293                                 }
 294 #endif
 295
 296                                 while ((strlen(buf) > 0) && (isspace(buf[strlen(buf) - 1])))
 297                                         buf[strlen(buf) - 1] = 0;
 298                                 if ((bq == 0) &&
 299                                 ((!strncmp(buf, ">", 1)) || (!strncmp(buf, " >", 2)) || (!strncmp(buf, " :-)", 4)))) {
 300                                         wprintf("<blockquote>");
 301                                         bq = 1;
 302                                 } else if ((bq == 1) &&
 303                                         (strncmp(buf, ">", 1)) && (strncmp(buf, " >", 2)) && (strncmp(buf, " :-)", 4))) {
 304                                         wprintf("</blockquote>");
 305                                         bq = 0;
 306                                 }
 307                                 wprintf("<tt>");
 308                                 url(buf);
 309                                 escputs(buf);
 310                                 wprintf("</tt><br />\n");
 311                         }
 312                         display_rss_control(from, subj);
 313                         wprintf("]]></description>\n");
 314                 }
 315                 /* HTML is fun, but we've got to strip it first */
 316                 else if (!strcasecmp(content_type, "text/html")) {
 317                         wprintf("      <description><![CDATA[");
 318                         output_html(charset);
 319                         wprintf("]]></description>\n");
 320                 }
 321
 322 ENDBODY:
 323                 wprintf("   </item>\n");
 324 ENDITEM:
 325                 now = 0L;
 326         }
 327
 328         /* Do RSS footer */
 329         wprintf("   </channel>\n");
 330         wprintf("</rss>\n");
 331         wDumpContent(0);
 332 }