webcit/rss.c

   1 /*
   2  * $Id$
   3  */
   4 /**
   5  * \defgroup RssRooms Generate some RSS for our rooms.
   6  */
   7 /*@{*/
   8 #include "webcit.h"
   9 #include "webserver.h"
  10
  11
  12 time_t if_modified_since;    /**< the last modified stamp */
  13
  14 /**
  15  * \brief view rss Config menu
  16  * \param reply_to the original author
  17  * \param subject the subject of the feed
  18  */
  19 void display_rss_control(char *reply_to, char *subject)
  20 {
  21         wprintf("<div style=\"align: right;\"><p>\n");
  22         wprintf("<a href=\"display_enter?recp=");
  23         urlescputs(reply_to);
  24         wprintf("&subject=");
  25         if (strncasecmp(subject, "Re: ", 3)) wprintf("Re:%20");
  26         urlescputs(subject);
  27         wprintf("\">[%s]</a> \n", _("Reply"));
  28         wprintf("<a href=\"display_enter?recp=");
  29         urlescputs(reply_to);
  30         wprintf("&force_room=_MAIL_&subject=");
  31         if (strncasecmp(subject, "Re: ", 3)) wprintf("Re:%20");
  32         urlescputs(subject);
  33         wprintf("\">[%s]</a>\n", _("Email"));
  34         wprintf("</p></div>\n");
  35 }
  36
  37
  38 /**
  39  * \brief print the feed to the subscriber
  40  * \param roomname the room we sould print out as rss
  41  * \param request_method the way the rss is requested????
  42  */
  43 void display_rss(char *roomname, char *request_method)
  44 {
  45         int nummsgs;
  46         int a, b;
  47         int bq = 0;
  48         time_t now = 0L;
  49         struct tm now_tm;
  50 #ifdef HAVE_ICONV
  51         iconv_t ic = (iconv_t)(-1) ;
  52         char *ibuf;                   /**< Buffer of characters to be converted */
  53         char *obuf;                   /**< Buffer for converted characters      */
  54         size_t ibuflen;               /**< Length of input buffer               */
  55         size_t obuflen;               /**< Length of output buffer              */
  56         char *osav;                   /**< Saved pointer to output buffer       */
  57 #endif
  58         char buf[SIZ];
  59         char date[30];
  60         char from[256];
  61         char subj[256];
  62         char node[256];
  63         char hnod[256];
  64         char room[256];
  65         char rfca[256];
  66         char rcpt[256];
  67         char msgn[256];
  68         char content_type[256];
  69         char charset[256];
  70
  71         if (!WC->logged_in) {
  72                 authorization_required(_("Not logged in"));
  73                 return;
  74         }
  75
  76         if (gotoroom((char *)roomname)) {
  77                 lprintf(3, "RSS: Can't goto requested room\n");
  78                 wprintf("HTTP/1.1 404 Not Found\r\n");
  79                 wprintf("Content-Type: text/html\r\n");
  80                 wprintf("\r\n");
  81                 wprintf("Error retrieving RSS feed: couldn't find room\n");
  82                 return;
  83         }
  84
  85         nummsgs = load_msg_ptrs("MSGS LAST|15", 0);
  86         if (nummsgs == 0) {
  87                 lprintf(3, "RSS: No messages found\n");
  88                 wprintf("HTTP/1.1 404 Not Found\r\n");
  89                 wprintf("Content-Type: text/html\r\n");
  90                 wprintf("\r\n");
  91                 wprintf(_("Error retrieving RSS feed: couldn't find messages\n"));
  92                 return;
  93         }
  94
  95         /** Read time of last message immediately */
  96         serv_printf("MSG4 %ld", WC->msgarr[nummsgs - 1]);
  97         serv_getln(buf, sizeof buf);
  98         if (buf[0] == '1') {
  99                 while (serv_getln(buf, sizeof buf), strcasecmp(buf, "000")) {
 100                         if (!strncasecmp(buf, "msgn=", 5)) {
 101                                 strcpy(msgn, &buf[5]);
 102                         }
 103                         if (!strncasecmp(buf, "time=", 5)) {
 104                                 now = atol(&buf[5]);
 105                                 gmtime_r(&now, &now_tm);
 106                                 strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", &now_tm);
 107                         }
 108                 }
 109         }
 110
 111         if (if_modified_since > 0 && if_modified_since > now) {
 112                 lprintf(3, "RSS: Feed not updated since the last time you looked\n");
 113                 wprintf("HTTP/1.1 304 Not Modified\r\n");
 114                 wprintf("Last-Modified: %s\r\n", date);
 115                 now = time(NULL);
 116                 gmtime_r(&now, &now_tm);
 117                 strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", &now_tm);
 118                 wprintf("Date: %s\r\n", date);
 119 /*              if (*msgn) wprintf("ETag: %s\r\n\r\n", msgn); */
 120                 wDumpContent(0);
 121                 return;
 122         }
 123
 124         /* Do RSS header */
 125         lprintf(3, "RSS: Yum yum! This feed is tasty!\n");
 126         wprintf("HTTP/1.1 200 OK\r\n");
 127         wprintf("Last-Modified: %s\r\n", date);
 128 /*      if (*msgn) wprintf("ETag: %s\r\n\r\n", msgn); */
 129         wprintf("Content-Type: application/rss+xml\r\n");
 130         wprintf("$erver: %s\r\n", SERVER);
 131         wprintf("Connection: close\r\n");
 132         wprintf("\r\n");
 133         if (!strcasecmp(request_method, "HEAD"))
 134                 return;
 135
 136         wprintf("<?xml version=\"1.0\"?>\n");
 137         wprintf("<rss version=\"2.0\">\n");
 138         wprintf("   <channel>\n");
 139         wprintf("   <title>%s - %s</title>\n", WC->wc_roomname, serv_info.serv_humannode);
 140         wprintf("   <link>%s://%s:%d/dotgoto?room=", (is_https ? "https" : "http"), WC->http_host, PORT_NUM);
 141         escputs(roomname);
 142         wprintf("</link>\n");
 143         wprintf("   <description>");
 144         /** Get room info for description */
 145         serv_puts("RINF");
 146         serv_getln(buf, sizeof buf);
 147         if (buf[0] == '1') {
 148                 while (1) {
 149                         serv_getln(buf, sizeof buf);
 150                         if (!strcmp(buf, "000"))
 151                                 break;
 152                         wprintf("%s\n", buf);
 153                 }
 154         }
 155         wprintf("</description>\n");
 156         if (now) {
 157                 wprintf("   <pubDate>%s</pubDate>\n", date);
 158         }
 159         wprintf("   <generator>%s</generator>\n", SERVER);
 160         wprintf("   <docs>http://blogs.law.harvard.edu/tech/rss</docs>\n");
 161         wprintf("   <ttl>30</ttl>\n");
 162
 163         /** Read all messages and output as RSS items */
 164         for (a = 0; a < nummsgs; ++a) {
 165                 /** Read message and output each as RSS item */
 166                 serv_printf("MSG4 %ld", WC->msgarr[a]);
 167                 serv_getln(buf, sizeof buf);
 168                 if (buf[0] != '1') continue;
 169
 170                 now = 0L;
 171                 strcpy(subj, "");
 172                 strcpy(hnod, "");
 173                 strcpy(node, "");
 174                 strcpy(room, "");
 175                 strcpy(rfca, "");
 176                 strcpy(rcpt, "");
 177                 strcpy(msgn, "");
 178
 179                 while (serv_getln(buf, sizeof buf), strcasecmp(buf, "text")) {
 180                         if (!strcmp(buf, "000")) {
 181                                 goto ENDITEM;   /** screw it */
 182                         } else if (!strncasecmp(buf, "from=", 5)) {
 183                                 strcpy(from, &buf[5]);
 184 #ifdef HAVE_ICONV
 185                                 utf8ify_rfc822_string(from);
 186 #endif
 187                         } else if (!strncasecmp(buf, "subj=", 5)) {
 188                                 strcpy(subj, &buf[5]);
 189 #ifdef HAVE_ICONV
 190                                 utf8ify_rfc822_string(subj);
 191 #endif
 192                         } else if (!strncasecmp(buf, "hnod=", 5)) {
 193                                 strcpy(node, &buf[5]);
 194                         } else if (!strncasecmp(buf, "room=", 5)) {
 195                                 strcpy(room, &buf[5]);
 196                         } else if (!strncasecmp(buf, "rfca=", 5)) {
 197                                 strcpy(rfca, &buf[5]);
 198                         } else if (!strncasecmp(buf, "rcpt=", 5)) {
 199                                 strcpy(rcpt, &buf[5]);
 200                         } else if (!strncasecmp(buf, "msgn=", 5)) {
 201                                 strcpy(msgn, &buf[5]);
 202                         } else if (!strncasecmp(buf, "time=", 5)) {
 203                                 now = atol(&buf[5]);
 204                                 gmtime_r(&now, &now_tm);
 205                                 strftime(date, sizeof date, "%a, %d %b %Y %H:%M:%S GMT", &now_tm);
 206                         }
 207                 }
 208                 wprintf("   <item>\n");
 209                 if (subj[0]) {
 210                         wprintf("      <title>%s from", subj);
 211                 } else {
 212                         wprintf("      <title>From");
 213                 }
 214                 wprintf(" %s", from);
 215                 wprintf(" in %s", room);
 216                 if (strcmp(hnod, serv_info.serv_humannode) && strlen(hnod) > 0) {
 217                         wprintf(" on %s", hnod);
 218                 }
 219                 wprintf("</title>\n");
 220                 if (now) {
 221                         wprintf("      <pubDate>%s</pubDate>\n", date);
 222                 }
 223                 wprintf("      <guid isPermaLink=\"false\">%s</guid>\n", msgn);
 224                 /** Now the hard part, the message itself */
 225                 strcpy(content_type, "text/plain");
 226                 while (serv_getln(buf, sizeof buf), strlen(buf) > 0) {
 227                         if (!strcmp(buf, "000")) {
 228                                 goto ENDBODY;
 229                         }
 230                         if (!strncasecmp(buf, "Content-type: ", 14)) {
 231                                 safestrncpy(content_type, &buf[14], sizeof content_type);
 232                                 for (b = 0; b < strlen(content_type); ++b) {
 233                                         if (!strncasecmp(&content_type[b], "charset=", 8)) {
 234                                                 safestrncpy(charset, &content_type[b + 8], sizeof charset);
 235                                         }
 236                                 }
 237                                 for (b = 0; b < strlen(content_type); ++b) {
 238                                         if (content_type[b] == ';') {
 239                                                 content_type[b] = 0;
 240                                         }
 241                                 }
 242                         }
 243                 }
 244
 245                 /** Set up a character set conversion if we need to */
 246 #ifdef HAVE_ICONV
 247                 if (strcasecmp(charset, "us-ascii") && strcasecmp(charset, "utf-8") && strcasecmp(charset, "") ) {
 248                         ic = iconv_open("UTF-8", charset);
 249                         if (ic == (iconv_t)(-1)) {
 250                                 lprintf(5, "%s:%d iconv_open() failed: %s\n",
 251                                         __FILE__, __LINE__, strerror(errno));
 252                                 goto ENDBODY;
 253                         }
 254                 }
 255 #endif
 256
 257                 /** Messages in legacy Citadel variformat get handled thusly... */
 258                 if (!strcasecmp(content_type, "text/x-citadel-variformat")) {
 259                         int intext = 0;
 260
 261                         wprintf("      <description><![CDATA[");
 262                         while (1) {
 263                                 serv_getln(buf, sizeof buf);
 264                                 if (!strcmp(buf, "000")) {
 265                                         if (bq == 1)
 266                                                 wprintf("</blockquote>");
 267                                         wprintf("\n");
 268                                         break;
 269                                 }
 270                                 if (intext == 1 && isspace(buf[0])) {
 271                                         wprintf("<br/>");
 272                                 }
 273                                 intext = 1;
 274                                 if (bq == 0 && !strncmp(buf, " >", 2)) {
 275                                         wprintf("<blockquote>");
 276                                         bq = 1;
 277                                 } else if (bq == 1 && strncmp(buf, " >", 2)) {
 278                                         wprintf("</blockquote>");
 279                                         bq = 0;
 280                                 }
 281                                 url(buf);
 282                                 escputs(buf);
 283                                 wprintf("\n");
 284                         }
 285                         display_rss_control(from, subj);
 286                         wprintf("]]></description>\n");
 287                 }
 288                 /** Boring old 80-column fixed format text gets handled this way... */
 289                 else if (!strcasecmp(content_type, "text/plain")) {
 290                         wprintf("      <description><![CDATA[");
 291                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 292                                 if (buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = 0;
 293                                 if (buf[strlen(buf)-1] == '\r') buf[strlen(buf)-1] = 0;
 294
 295 #ifdef HAVE_ICONV
 296                                 if (ic != (iconv_t)(-1) ) {
 297                                         ibuf = buf;
 298                                         ibuflen = strlen(ibuf);
 299                                         obuflen = SIZ;
 300                                         obuf = (char *) malloc(obuflen);
 301                                         osav = obuf;
 302                                         iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
 303                                         osav[SIZ-obuflen] = 0;
 304                                         safestrncpy(buf, osav, sizeof buf);
 305                                         free(osav);
 306                                 }
 307 #endif
 308
 309                                 while ((strlen(buf) > 0) && (isspace(buf[strlen(buf) - 1])))
 310                                         buf[strlen(buf) - 1] = 0;
 311                                 if ((bq == 0) &&
 312                                 ((!strncmp(buf, ">", 1)) || (!strncmp(buf, " >", 2)) || (!strncmp(buf, " :-)", 4)))) {
 313                                         wprintf("<blockquote>");
 314                                         bq = 1;
 315                                 } else if ((bq == 1) &&
 316                                         (strncmp(buf, ">", 1)) && (strncmp(buf, " >", 2)) && (strncmp(buf, " :-)", 4))) {
 317                                         wprintf("</blockquote>");
 318                                         bq = 0;
 319                                 }
 320                                 wprintf("<tt>");
 321                                 url(buf);
 322                                 escputs(buf);
 323                                 wprintf("</tt><br />\n");
 324                         }
 325                         display_rss_control(from, subj);
 326                         wprintf("]]></description>\n");
 327                 }
 328                 /** HTML is fun, but we've got to strip it first */
 329                 else if (!strcasecmp(content_type, "text/html")) {
 330                         wprintf("      <description><![CDATA[");
 331                         output_html(charset);
 332                         wprintf("]]></description>\n");
 333                 }
 334
 335 ENDBODY:
 336                 wprintf("   </item>\n");
 337 ENDITEM:
 338                 now = 0L;
 339         }
 340
 341         /** Do RSS footer */
 342         wprintf("   </channel>\n");
 343         wprintf("</rss>\n");
 344         wDumpContent(0);
 345 }
 346
 347
 348 /*@}*/