webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22
  23 HashList *HandlerHash = NULL;
  24
  25 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31
  32         if (HandlerHash == NULL)
  33                 HandlerHash = NewHash(1, NULL);
  34
  35         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  36         NewHandler->F = F;
  37         NewHandler->Flags = Flags;
  38         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  39 }
  40
  41
  42 /*
  43  * web-printing funcion. uses our vsnprintf wrapper
  44  */
  45 void wprintf(const char *format,...)
  46 {
  47         wcsession *WCC = WC;
  48         va_list arg_ptr;
  49
  50         if (WCC->WBuf == NULL)
  51                 WCC->WBuf = NewStrBuf();
  52
  53         va_start(arg_ptr, format);
  54         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  55         va_end(arg_ptr);
  56 }
  57
  58 /*
  59  * http-header-printing funcion. uses our vsnprintf wrapper
  60  */
  61 void hprintf(const char *format,...)
  62 {
  63         wcsession *WCC = WC;
  64         va_list arg_ptr;
  65
  66         va_start(arg_ptr, format);
  67         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  68         va_end(arg_ptr);
  69 }
  70
  71
  72
  73 /*
  74  * wrap up an HTTP session, closes tags, etc.
  75  *
  76  * print_standard_html_footer should be set to:
  77  * 0            - to transmit only,
  78  * nonzero      - to append the closing tags
  79  */
  80 void wDumpContent(int print_standard_html_footer)
  81 {
  82         if (print_standard_html_footer) {
  83                 wprintf("</div> <!-- end of 'content' div -->\n");
  84                 do_template("trailing", NULL);
  85         }
  86
  87         /* If we've been saving it all up for one big output burst,
  88          * go ahead and do that now.
  89          */
  90         end_burst();
  91 }
  92
  93
  94
  95
  96 /*
  97  * Output HTTP headers and leading HTML for a page
  98  */
  99 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 100                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 101
 102                         int do_room_banner,     /* 0=no, 1=yes,
 103                                                  * 2 = I'm going to embed my own, so don't open the
 104                                                  *     <div id="content"> either.
 105                                                  */
 106
 107                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 108                         int suppress_check,     /* 1 = suppress check for instant messages          */
 109                         int cache               /* 1 = allow browser to cache this page             */
 110 ) {
 111         wcsession *WCC = WC;
 112         char cookie[1024];
 113         char httpnow[128];
 114
 115         hprintf("HTTP/1.1 200 OK\n");
 116         http_datestring(httpnow, sizeof httpnow, time(NULL));
 117
 118         if (do_httpheaders) {
 119                 if (WCC->serv_info != NULL)
 120                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 121                                 "Server: %s / %s\n"
 122                                 "Connection: close\r\n",
 123                                 PACKAGE_STRING,
 124                                 ChrPtr(WCC->serv_info->serv_software));
 125                 else
 126                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 127                                 "Server: %s / [n/a]\n"
 128                                 "Connection: close\r\n",
 129                                 PACKAGE_STRING);
 130         }
 131
 132         if (cache) {
 133                 char httpTomorow[128];
 134
 135                 http_datestring(httpTomorow, sizeof httpTomorow,
 136                                 time(NULL) + 60 * 60 * 24 * 2);
 137
 138                 hprintf("Pragma: public\r\n"
 139                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 140                         "Last-modified: %s\r\n"
 141                         "Expires: %s\r\n",
 142                         httpnow,
 143                         httpTomorow
 144                 );
 145         }
 146         else {
 147                 hprintf("Pragma: no-cache\r\n"
 148                         "Cache-Control: no-store\r\n"
 149                         "Expires: -1\r\n"
 150                 );
 151         }
 152
 153         stuff_to_cookie(cookie, 1024,
 154                         WCC->wc_session, WCC->wc_username,
 155                         WCC->wc_password, WCC->wc_roomname);
 156
 157         if (unset_cookies) {
 158                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 159         } else {
 160                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 161                 if (server_cookie != NULL) {
 162                         hprintf("%s\n", server_cookie);
 163                 }
 164         }
 165
 166         if (do_htmlhead) {
 167                 begin_burst();
 168                 do_template("head", NULL);
 169
 170                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 171                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 172                         wprintf("<div id=\"important_message\">\n"
 173                                 "<span class=\"imsg\">");
 174                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 175                         wprintf("</span><br />\n"
 176                                 "</div>\n"
 177                         );
 178                         StrBufAppendBufPlain(WCC->trailing_javascript,
 179                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 180                                              0
 181                         );
 182                         WCC->ImportantMessage[0] = 0;
 183                 }
 184                 else if (StrLength(WCC->ImportantMsg) > 0) {
 185                         wprintf("<div id=\"important_message\">\n"
 186                                 "<span class=\"imsg\">");
 187                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 188                         wprintf("</span><br />\n"
 189                                 "</div>\n"
 190                         );
 191                         StrBufAppendBufPlain(WCC->trailing_javascript,
 192                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 193                                              0
 194                         );
 195                         FlushStrBuf(WCC->ImportantMsg);
 196                 }
 197                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 198                         /*DoTemplate(HKEY("iconbar"), NULL, &NoCtx);*/
 199                         page_popup();
 200                 }
 201
 202                 if (do_room_banner == 1) {
 203                         wprintf("<div id=\"banner\">\n");
 204                         embed_room_banner(NULL, navbar_default);
 205                         wprintf("</div>\n");
 206                 }
 207         }
 208
 209         if (do_room_banner == 1) {
 210                 wprintf("<div id=\"content\">\n");
 211         }
 212 }
 213
 214 void output_custom_content_header(const char *ctype) {
 215   hprintf("HTTP/1.1 200 OK\r\n");
 216   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 217   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 218   hprintf("Connection: close\r\n");
 219 }
 220
 221
 222 /*
 223  * Generic function to do an HTTP redirect.  Easy and fun.
 224  */
 225 void http_redirect(const char *whichpage) {
 226         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 227         hprintf("Location: %s\r\n", whichpage);
 228         hprintf("URI: %s\r\n", whichpage);
 229         hprintf("Content-type: text/html; charset=utf-8\r\n");
 230         wprintf("<html><body>");
 231         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 232         wprintf("</body></html>\n");
 233         end_burst();
 234 }
 235
 236
 237
 238 /*
 239  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 240  */
 241 void http_transmit_thing(const char *content_type,
 242                          int is_static) {
 243
 244 #ifndef TECH_PREVIEW
 245         lprintf(9, "http_transmit_thing(%s)%s\n",
 246                 content_type,
 247                 (is_static ? " (static)" : "")
 248         );
 249 #endif
 250         output_headers(0, 0, 0, 0, 0, is_static);
 251
 252         hprintf("Content-type: %s\r\n"
 253                 "Server: %s\r\n"
 254                 "Connection: close\r\n",
 255                 content_type,
 256                 PACKAGE_STRING);
 257
 258         end_burst();
 259 }
 260
 261 /*
 262  * print menu box like used in the floor view or admin interface.
 263  * This function takes pair of strings as va_args,
 264  * Title        Title string of the box
 265  * Class        CSS Class for the box
 266  * nLines       How many string pairs should we print? (URL, UrlText)
 267  * ...          Pairs of URL Strings and their Names
 268  */
 269 void print_menu_box(char* Title, char *Class, int nLines, ...)
 270 {
 271         va_list arg_list;
 272         long i;
 273
 274         svput("BOXTITLE", WCS_STRING, Title);
 275         do_template("beginboxx", NULL);
 276
 277         wprintf("<ul class=\"%s\">", Class);
 278
 279         va_start(arg_list, nLines);
 280         for (i = 0; i < nLines; ++i)
 281         {
 282                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 283                 wprintf((char *) va_arg(arg_list, char *));
 284                 wprintf("</a></li>\n");
 285         }
 286         va_end (arg_list);
 287
 288         wprintf("</a></li>\n");
 289
 290         wprintf("</ul>");
 291
 292         do_template("endbox", NULL);
 293 }
 294
 295
 296 /*
 297  * dump out static pages from disk
 298  */
 299 void output_static(const char *what)
 300 {
 301         int fd;
 302         struct stat statbuf;
 303         off_t bytes;
 304         off_t count = 0;
 305         const char *content_type;
 306         int len;
 307         const char *Err;
 308
 309         fd = open(what, O_RDONLY);
 310         if (fd <= 0) {
 311                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 312                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 313                 hprintf("Content-Type: text/plain\r\n");
 314                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 315                 end_burst();
 316         } else {
 317                 len = strlen (what);
 318                 content_type = GuessMimeByFilename(what, len);
 319
 320                 if (fstat(fd, &statbuf) == -1) {
 321                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 322                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 323                         hprintf("Content-Type: text/plain\r\n");
 324                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 325                         end_burst();
 326                         return;
 327                 }
 328
 329                 count = 0;
 330                 bytes = statbuf.st_size;
 331
 332                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 333                 {
 334                         if (fd > 0) close(fd);
 335                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 336                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 337                                 hprintf("Content-Type: text/plain\r\n");
 338                                 end_burst();
 339                                 return;
 340                 }
 341
 342
 343                 close(fd);
 344 #ifndef TECH_PREVIEW
 345                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 346 #endif
 347                 http_transmit_thing(content_type, 1);
 348         }
 349         if (yesbstr("force_close_session")) {
 350                 end_webcit_session();
 351         }
 352 }
 353
 354
 355 /*
 356  * Convenience functions to display a page containing only a string
 357  *
 358  * titlebarcolor        color of the titlebar of the frame
 359  * titlebarmsg          text to display in the title bar
 360  * messagetext          body of the box
 361  */
 362 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 363 {
 364         hprintf("HTTP/1.1 200 OK\n");
 365         output_headers(1, 1, 2, 0, 0, 0);
 366         wprintf("<div id=\"banner\">\n");
 367         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 368         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 369         wprintf("</td></tr></table>\n");
 370         wprintf("</div>\n<div id=\"content\">\n");
 371         escputs(messagetext);
 372
 373         wprintf("<hr />\n");
 374         wDumpContent(1);
 375 }
 376
 377
 378 /*
 379  * Display a blank page.
 380  */
 381 void blank_page(void) {
 382         output_headers(1, 1, 0, 0, 0, 0);
 383         wDumpContent(2);
 384 }
 385
 386
 387 /*
 388  * A template has been requested
 389  */
 390 void url_do_template(void) {
 391         const StrBuf *MimeType;
 392         const StrBuf *Tmpl = sbstr("template");
 393         begin_burst();
 394         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 395         http_transmit_thing(ChrPtr(MimeType), 0);
 396 }
 397
 398
 399
 400 /*
 401  * convenience function to indicate success
 402  */
 403 void display_success(char *successmessage)
 404 {
 405         convenience_page("007700", "OK", successmessage);
 406 }
 407
 408
 409 /*
 410  * Authorization required page
 411  * This is probably temporary and should be revisited
 412  */
 413 void authorization_required(const char *message)
 414 {
 415         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 416         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 417         hprintf("Content-Type: text/html\r\n");
 418         wprintf("<h1>");
 419         wprintf(_("Authorization Required"));
 420         wprintf("</h1>\r\n");
 421         wprintf(_("The resource you requested requires a valid username and password. "
 422                 "You could not be logged in: %s\n"), message);
 423         wDumpContent(0);
 424
 425 }
 426
 427 /*
 428  * Convenience functions to wrap around asynchronous ajax responses
 429  */
 430 void begin_ajax_response(void) {
 431         wcsession *WCC = WC;
 432
 433         FlushStrBuf(WCC->HBuf);
 434         output_headers(0, 0, 0, 0, 0, 0);
 435
 436         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 437                 "Server: %s\r\n"
 438                 "Connection: close\r\n"
 439                 ,
 440                 PACKAGE_STRING);
 441         begin_burst();
 442 }
 443
 444 /*
 445  * print ajax response footer
 446  */
 447 void end_ajax_response(void) {
 448         wDumpContent(0);
 449 }
 450
 451 /*
 452  * Wraps a Citadel server command in an AJAX transaction.
 453  */
 454 void ajax_servcmd(void)
 455 {
 456         wcsession *WCC = WC;
 457         int Done = 0;
 458         StrBuf *Buf;
 459         char *junk;
 460         size_t len;
 461
 462         begin_ajax_response();
 463         Buf = NewStrBuf();
 464         serv_puts(bstr("g_cmd"));
 465         StrBuf_ServGetln(Buf);
 466         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 467         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 468
 469         switch (GetServerStatus(Buf, NULL)) {
 470         case 8:
 471                 serv_puts("\n\n000");
 472                 if ( (StrLength(Buf)==3) &&
 473                      !strcmp(ChrPtr(Buf), "000")) {
 474                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 475                         break;
 476                 }
 477         case 1:
 478                 while (!Done) {
 479                         StrBuf_ServGetlnBuffered(Buf);
 480                         if ( (StrLength(Buf)==3) &&
 481                              !strcmp(ChrPtr(Buf), "000")) {
 482                                 Done = 1;
 483                         }
 484                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 485                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 486                 }
 487                 break;
 488         case 4:
 489                 text_to_server(bstr("g_input"));
 490                 serv_puts("000");
 491                 break;
 492         case 6:
 493                 len = atol(&ChrPtr(Buf)[4]);
 494                 StrBuf_ServGetBLOBBuffered(Buf, len);
 495                 break;
 496         case 7:
 497                 len = atol(&ChrPtr(Buf)[4]);
 498                 junk = malloc(len);
 499                 memset(junk, 0, len);
 500                 serv_write(junk, len);
 501                 free(junk);
 502         }
 503
 504         end_ajax_response();
 505
 506         /*
 507          * This is kind of an ugly hack, but this is the only place it can go.
 508          * If the command was GEXP, then the instant messenger window must be
 509          * running, so reset the "last_pager_check" watchdog timer so
 510          * that page_popup() doesn't try to open it a second time.
 511          */
 512         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 513                 WCC->last_pager_check = time(NULL);
 514         }
 515         FreeStrBuf(&Buf);
 516 }
 517
 518
 519 /*
 520  * Helper function for the asynchronous check to see if we need
 521  * to open the instant messenger window.
 522  */
 523 void seconds_since_last_gexp(void)
 524 {
 525         char buf[256];
 526
 527         if ( (time(NULL) - WC->last_pager_check) < 30) {
 528                 wprintf("NO\n");
 529         }
 530         else {
 531                 memset(buf, 0, 5);
 532                 serv_puts("NOOP");
 533                 serv_getln(buf, sizeof buf);
 534                 if (buf[3] == '*') {
 535                         wprintf("YES");
 536                 }
 537                 else {
 538                         wprintf("NO");
 539                 }
 540         }
 541 }
 542
 543 /**
 544  * \brief Detects a 'mobile' user agent
 545  */
 546 int is_mobile_ua(char *user_agent) {
 547       if (strstr(user_agent,"iPhone OS") != NULL) {
 548         return 1;
 549       } else if (strstr(user_agent,"Windows CE") != NULL) {
 550         return 1;
 551       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 552         return 1;
 553       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 554         return 1;
 555       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 556               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 557           return 1;
 558           }
 559       return 0;
 560 }
 561
 562
 563 /*
 564  * Entry point for WebCit transaction
 565  */
 566 void session_loop(HashList *HTTPHeaders,
 567                   StrBuf *ReqLine,
 568                   StrBuf *request_method,
 569                   StrBuf *ReadBuf,
 570                   const char **Pos)
 571 {
 572         StrBuf *Buf;
 573         const char *pch, *pchs, *pche;
 574         void *vLine;
 575         char action[1024];
 576         char arg[8][128];
 577         size_t sizes[10];
 578         char *index[10];
 579         char buf[SIZ];
 580         int a, nBackDots, nEmpty;
 581         int ContentLength = 0;
 582         StrBuf *ContentType = NULL;
 583         StrBuf *UrlLine = NULL;
 584         StrBuf *content = NULL;
 585         const char *content_end = NULL;
 586         StrBuf *browser_host = NULL;
 587         char user_agent[256];
 588         int body_start = 0;
 589         int is_static = 0;
 590         int n_static = 0;
 591         int len = 0;
 592         void *vHandler;
 593         WebcitHandler *Handler;
 594         struct timeval tx_start;
 595         struct timeval tx_finish;
 596
 597         /*
 598          * We stuff these with the values coming from the client cookies,
 599          * so we can use them to reconnect a timed out session if we have to.
 600          */
 601         StrBuf *c_username;
 602         StrBuf *c_password;
 603         StrBuf *c_roomname;
 604         char c_httpauth_string[SIZ];
 605         StrBuf *c_httpauth_user;
 606         StrBuf *c_httpauth_pass;
 607         wcsession *WCC;
 608
 609         gettimeofday(&tx_start, NULL);          /* start a stopwatch for performance timing */
 610
 611         Buf = NewStrBuf();
 612         c_username = NewStrBuf();
 613         c_password = NewStrBuf();
 614         c_roomname = NewStrBuf();
 615         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 616         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 617         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 618
 619         WCC= WC;
 620         if (WCC->WBuf == NULL)
 621                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 622         FlushStrBuf(WCC->WBuf);
 623
 624         if (WCC->HBuf == NULL)
 625                 WCC->HBuf = NewStrBuf();
 626         FlushStrBuf(WCC->HBuf);
 627
 628         WCC->upload_length = 0;
 629         WCC->upload = NULL;
 630         WCC->is_mobile = 0;
 631         WCC->trailing_javascript = NewStrBuf();
 632         WCC->nWildfireHeaders = 0;
 633
 634         /** Figure out the action */
 635         index[0] = action;
 636         sizes[0] = sizeof action;
 637         for (a=1; a<9; a++)
 638         {
 639                 index[a] = arg[a-1];
 640                 sizes[a] = sizeof arg[a-1];
 641         }
 642         nBackDots = 0;
 643         nEmpty = 0;
 644         for ( a = 0; a < 9; ++a)
 645         {
 646                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 647                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 648                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 649                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 650                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 651                         nBackDots++;
 652                 if (index[a][0] == '\0')
 653                         nEmpty++;
 654         }
 655
 656
 657         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 658             (vLine != NULL)){
 659                 cookie_to_stuff((StrBuf *)vLine, NULL,
 660                                 c_username,
 661                                 c_password,
 662                                 c_roomname);
 663         }
 664         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 665             (vLine!=NULL)) {
 666                 StrBufDecodeBase64((StrBuf*)vLine);
 667                 StrBufExtract_token(c_httpauth_user, (StrBuf*)vLine, 0, ':');
 668                 StrBufExtract_token(c_httpauth_pass, (StrBuf*)vLine, 1, ':');
 669         }
 670         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 671             (vLine!=NULL)) {
 672                 ContentLength = StrToi((StrBuf*)vLine);
 673         }
 674         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 675             (vLine!=NULL)) {
 676                 ContentType = (StrBuf*)vLine;
 677         }
 678         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 679             (vLine!=NULL)) {
 680                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 681 #ifdef TECH_PREVIEW
 682                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 683                         WCC->is_mobile = 1;
 684                 }
 685                 else {
 686                         WCC->is_mobile = 0;
 687                 }
 688 #endif
 689         }
 690         if ((follow_xff) &&
 691             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 692             (vLine != NULL)) {
 693                 WCC->http_host = (StrBuf*)vLine;
 694         }
 695         if ((StrLength(WCC->http_host) == 0) &&
 696             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 697             (vLine!=NULL)) {
 698                 WCC->http_host = (StrBuf*)vLine;
 699         }
 700
 701         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 702             (vLine!=NULL)) {
 703                 browser_host = (StrBuf*) vLine;
 704
 705                 while (StrBufNum_tokens(browser_host, ',') > 1) {
 706                         StrBufRemove_token(browser_host, 0, ',');
 707                 }
 708                 StrBufTrim(browser_host);
 709         }
 710
 711         if (ContentLength > 0) {
 712                 content = NewStrBuf();
 713                 StrBufPrintf(content, "Content-type: %s\n"
 714                          "Content-length: %d\n\n",
 715                          ChrPtr(ContentType), ContentLength);
 716 /*
 717                 hprintf("Content-type: %s\n"
 718                         "Content-length: %d\n\n",
 719                         ContentType, ContentLength);
 720 */
 721                 body_start = StrLength(content);
 722
 723                 /** Read the entire input data at once. */
 724                 client_read_to(&WCC->http_sock,
 725                                content,
 726                                ReadBuf, Pos,
 727                                ContentLength,
 728                                SLEEPING);
 729
 730                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 731                         StrBufCutLeft(content, body_start);
 732                         ParseURLParams(content);
 733                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 734                         content_end = ChrPtr(content) + ContentLength + body_start;
 735                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 736                 }
 737         } else {
 738                 content = NULL;
 739         }
 740
 741         /* make a note of where we are in case the user wants to save it */
 742         WCC->this_page = NewStrBufDup(ReqLine);
 743         StrBufRemove_token(WCC->this_page, 2, ' ');
 744         StrBufRemove_token(WCC->this_page, 0, ' ');
 745
 746         /* If there are variables in the URL, we must grab them now */
 747         UrlLine = NewStrBufDup(ReqLine);
 748         len = StrLength(UrlLine);
 749         pch = pchs = ChrPtr(UrlLine);
 750         pche = pchs + len;
 751         while (pch < pche) {
 752                 if ((*pch == '?') || (*pch == '&')) {
 753                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 754                         ParseURLParams(UrlLine);
 755                         break;
 756                 }
 757                 pch ++;
 758         }
 759         FreeStrBuf(&UrlLine);
 760
 761         /* If it's a "force 404" situation then display the error and bail. */
 762         if (!strcmp(action, "404")) {
 763                 hprintf("HTTP/1.1 404 Not found\r\n");
 764                 hprintf("Content-Type: text/plain\r\n");
 765                 wprintf("Not found\r\n");
 766                 end_burst();
 767                 goto SKIP_ALL_THIS_CRAP;
 768         }
 769
 770         /* Static content can be sent without connecting to Citadel. */
 771         is_static = 0;
 772         for (a=0; a<ndirs && ! is_static; ++a) {
 773                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 774                         is_static = 1;
 775                         n_static = a;
 776                 }
 777         }
 778         if (is_static) {
 779                 if (nBackDots < 2)
 780                 {
 781                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 782                                  static_dirs[n_static],
 783                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 784                         for (a=0; a<8; ++a) {
 785                                 if (buf[strlen(buf)-1] == '/') {
 786                                         buf[strlen(buf)-1] = 0;
 787                                 }
 788                         }
 789                         for (a = 0; a < strlen(buf); ++a) {
 790                                 if (isspace(buf[a])) {
 791                                         buf[a] = 0;
 792                                 }
 793                         }
 794                         output_static(buf);
 795                 }
 796                 else
 797                 {
 798                         lprintf(9, "Suspicious request. Ignoring.");
 799                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 800                         hprintf("Content-Type: text/plain\r\n\r\n");
 801                         wprintf("You have sent a malformed or invalid request.\r\n");
 802                         end_burst();
 803                 }
 804                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 805         }
 806
 807         /* If the client sent a nonce that is incorrect, kill the request. */
 808         if (havebstr("nonce")) {
 809                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 810                         bstr("nonce"), WCC->nonce);
 811                 if (ibstr("nonce") != WCC->nonce) {
 812                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 813                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 814                         hprintf("Content-Type: text/plain\r\n\r\n");
 815                         wprintf("Security check failed.\r\n");
 816                         end_burst();
 817                         goto SKIP_ALL_THIS_CRAP;
 818                 }
 819         }
 820
 821         /*
 822          * If we're not connected to a Citadel server, try to hook up the
 823          * connection now.
 824          */
 825         if (!WCC->connected) {
 826                 if (WCC->ReadBuf == NULL)
 827                         WCC->ReadBuf = NewStrBuf();
 828                 if (!strcasecmp(ctdlhost, "uds")) {
 829                         /* unix domain socket */
 830                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 831                         WCC->serv_sock = uds_connectsock(buf);
 832                 }
 833                 else {
 834                         /* tcp socket */
 835                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 836                 }
 837
 838                 if (WCC->serv_sock < 0) {
 839                         do_logout();
 840                         FreeStrBuf(&WCC->ReadBuf);
 841                         goto SKIP_ALL_THIS_CRAP;
 842                 }
 843                 else {
 844                         WCC->connected = 1;
 845                         serv_getln(buf, sizeof buf);    /* get the server greeting */
 846
 847                         /* Are there too many users already logged in? */
 848                         if (!strncmp(buf, "571", 3)) {
 849                                 wprintf(_("This server is already serving its maximum number of users and cannot accept any additional logins at this time.  Please try again later or contact your system administrator."));
 850                                 end_burst();
 851                                 end_webcit_session();
 852                                 goto SKIP_ALL_THIS_CRAP;
 853                         }
 854
 855                         /*
 856                          * From what host is our user connecting?  Go with
 857                          * the host at the other end of the HTTP socket,
 858                          * unless we are following X-Forwarded-For: headers
 859                          * and such a header has already turned up something.
 860                          */
 861                         if ( (!follow_xff) || (StrLength(browser_host) == 0) ) {
 862                                 if (browser_host == NULL) {
 863                                         browser_host = NewStrBuf();
 864                                         Put(HTTPHeaders, HKEY("FreeMeWithTheOtherHeaders"),
 865                                             browser_host, HFreeStrBuf);
 866                                 }
 867                                 locate_host(browser_host, WCC->http_sock);
 868                         }
 869                         if (WCC->serv_info == NULL)
 870                                 WCC->serv_info = get_serv_info(browser_host, user_agent);
 871                         if (WCC->serv_info == NULL){
 872                                 begin_burst();
 873                                 wprintf(_("Received unexpected answer from Citadel "
 874                                           "server; bailing out."));
 875                                 hprintf("HTTP/1.1 200 OK\r\n");
 876                                 hprintf("Content-type: text/plain; charset=utf-8\r\n");
 877                                 end_burst();
 878                                 end_webcit_session();
 879                                 goto SKIP_ALL_THIS_CRAP;
 880                         }
 881                         if (WCC->serv_info->serv_rev_level < MINIMUM_CIT_VERSION) {
 882                                 begin_burst();
 883                                 wprintf(_("You are connected to a Citadel "
 884                                         "server running Citadel %d.%02d. \n"
 885                                         "In order to run this version of WebCit "
 886                                         "you must also have Citadel %d.%02d or"
 887                                         " newer.\n\n\n"),
 888                                                 WCC->serv_info->serv_rev_level / 100,
 889                                                 WCC->serv_info->serv_rev_level % 100,
 890                                                 MINIMUM_CIT_VERSION / 100,
 891                                                 MINIMUM_CIT_VERSION % 100
 892                                         );
 893                                 hprintf("HTTP/1.1 200 OK\r\n");
 894                                 hprintf("Content-type: text/plain; charset=utf-8\r\n");
 895                                 end_burst();
 896                                 end_webcit_session();
 897                                 goto SKIP_ALL_THIS_CRAP;
 898                         }
 899                 }
 900         }
 901
 902         /*
 903          * Functions which can be performed without logging in
 904          */
 905         if (!strcasecmp(action, "listsub")) {
 906                 do_listsub();
 907                 goto SKIP_ALL_THIS_CRAP;
 908         }
 909         if (!strcasecmp(action, "freebusy")) {
 910                 do_freebusy(ChrPtr(ReqLine));
 911                 goto SKIP_ALL_THIS_CRAP;
 912         }
 913
 914         /*
 915          * If we're not logged in, but we have HTTP Authentication data,
 916          * try logging in to Citadel using that.
 917          */
 918         if ((!WCC->logged_in)
 919             && (StrLength(c_httpauth_user) > 0)
 920             && (StrLength(c_httpauth_pass) > 0))
 921         {
 922                 FlushStrBuf(Buf);
 923                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 924                 StrBuf_ServGetln(Buf);
 925                 if (GetServerStatus(Buf, NULL) == 3) {
 926                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 927                         StrBuf_ServGetln(Buf);
 928                         if (GetServerStatus(Buf, NULL) == 2) {
 929                                 become_logged_in(c_httpauth_user,
 930                                                 c_httpauth_pass, Buf);
 931                                 if (WCC->httpauth_user == NULL)
 932                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 933                                 else {
 934                                         FlushStrBuf(WCC->httpauth_user);
 935                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 936                                 }
 937                                 if (WCC->httpauth_pass == NULL)
 938                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 939                                 else {
 940                                         FlushStrBuf(WCC->httpauth_pass);
 941                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 942                                 }
 943                         } else {
 944                                 /* Should only display when password is wrong */
 945                                 authorization_required(&buf[4]);
 946                                 FreeStrBuf(&Buf);
 947                                 goto SKIP_ALL_THIS_CRAP;
 948                         }
 949                 }
 950         }
 951
 952         /* This needs to run early */
 953 #ifdef TECH_PREVIEW
 954         if (!strcasecmp(action, "rss")) {
 955                 display_rss(sbstr("room"), request_method);
 956                 goto SKIP_ALL_THIS_CRAP;
 957         }
 958 #endif
 959
 960         /*
 961          * The GroupDAV stuff relies on HTTP authentication instead of
 962          * our session's authentication.
 963          */
 964         if (!strncasecmp(action, "groupdav", 8)) {
 965                 groupdav_main(HTTPHeaders,
 966                               ReqLine, request_method,
 967                               ContentType, /* do GroupDAV methods */
 968                               ContentLength, content, body_start);
 969                 if (!WCC->logged_in) {
 970                         WCC->killthis = 1;      /* If not logged in, don't */
 971                 }                               /* keep the session active */
 972                 goto SKIP_ALL_THIS_CRAP;
 973         }
 974
 975
 976         /*
 977          * Automatically send requests with any method other than GET or
 978          * POST to the GroupDAV code as well.
 979          */
 980         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 981                 groupdav_main(HTTPHeaders, ReqLine,
 982                               request_method, ContentType, /** do GroupDAV methods */
 983                               ContentLength, content, body_start);
 984                 if (!WCC->logged_in) {
 985                         WCC->killthis = 1;      /** If not logged in, don't */
 986                 }                               /** keep the session active */
 987                 goto SKIP_ALL_THIS_CRAP;
 988         }
 989
 990         /*
 991          * If we're not logged in, but we have username and password cookies
 992          * supplied by the browser, try using them to log in.
 993          */
 994         if ((!WCC->logged_in)
 995            && (StrLength(c_username)>0)
 996            && (StrLength(c_password)>0)) {
 997                 serv_printf("USER %s", ChrPtr(c_username));
 998                 StrBuf_ServGetln(Buf);
 999                 if (GetServerStatus(Buf, NULL) == 3) {
1000                         serv_printf("PASS %s", ChrPtr(c_password));
1001                         StrBuf_ServGetln(Buf);
1002                         if (GetServerStatus(Buf, NULL) == 2) {
1003                                 become_logged_in(c_username, c_password, Buf);
1004                                 get_preference("default_header_charset", &WCC->DefaultCharset);
1005                         }
1006                 }
1007         }
1008
1009         /*
1010          * If a 'gotofirst' parameter has been specified, attempt to goto that room
1011          * prior to doing anything else.
1012          */
1013         if (havebstr("gotofirst")) {
1014                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
1015         }
1016
1017         /*
1018          * If we don't have a current room, but a cookie specifying the
1019          * current room is supplied, make an effort to go there.
1020          */
1021         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
1022                 serv_printf("GOTO %s", ChrPtr(c_roomname));
1023                 StrBuf_ServGetln(Buf);
1024                 if (GetServerStatus(Buf, NULL) == 2) {
1025                         if (WCC->wc_roomname == NULL) {
1026                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
1027                         }
1028                         else {
1029                                 FlushStrBuf(WCC->wc_roomname);
1030                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
1031                         }
1032                 }
1033         }
1034
1035         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1036                 Handler = (WebcitHandler*) vHandler;
1037         if (Handler != NULL) {
1038                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1039                         display_login(NULL);
1040                 }
1041                 else {
1042                         if((Handler->Flags & NEED_URL)) {
1043                                 if (WCC->UrlFragment1 == NULL)
1044                                         WCC->UrlFragment1 = NewStrBuf();
1045                                 if (WCC->UrlFragment2 == NULL)
1046                                         WCC->UrlFragment2 = NewStrBuf();
1047                                 if (WCC->UrlFragment3 == NULL)
1048                                         WCC->UrlFragment3 = NewStrBuf();
1049                                 if (WCC->UrlFragment4 == NULL)
1050                                         WCC->UrlFragment4 = NewStrBuf();
1051                                 StrBufPlain(WCC->UrlFragment1, index[0], -1);
1052                                 StrBufPlain(WCC->UrlFragment2, index[1], -1);
1053                                 StrBufPlain(WCC->UrlFragment3, index[2], -1);
1054                                 StrBufPlain(WCC->UrlFragment4, index[3], -1);
1055                         }
1056                         if ((Handler->Flags & AJAX) != 0)
1057                                 begin_ajax_response();
1058                         Handler->F();
1059                         if ((Handler->Flags & AJAX) != 0)
1060                                 end_ajax_response();
1061                 }
1062         }
1063         /* When all else fais, display the main menu. */
1064         else {
1065                 if (!WCC->logged_in)
1066                         display_login(NULL);
1067                 else
1068                         display_main_menu();
1069         }
1070
1071 SKIP_ALL_THIS_CRAP:
1072         if (WCC->SavePrefsToServer) {
1073                 save_preferences();
1074                 WCC->SavePrefsToServer = 0;
1075         }
1076         FreeStrBuf(&Buf);
1077         FreeStrBuf(&c_username);
1078         FreeStrBuf(&c_password);
1079         FreeStrBuf(&c_roomname);
1080         FreeStrBuf(&c_httpauth_user);
1081         FreeStrBuf(&c_httpauth_pass);
1082         FreeStrBuf(&WCC->this_page);
1083         fflush(stdout);
1084         if (content != NULL) {
1085                 FreeStrBuf(&content);
1086                 content = NULL;
1087         }
1088         DeleteHash(&WCC->urlstrings);
1089         if (WCC->upload_length > 0) {
1090                 free(WCC->upload);
1091                 WCC->upload_length = 0;
1092         }
1093         FreeStrBuf(&WCC->trailing_javascript);
1094         WCC->http_host = NULL;
1095
1096         /* How long did this transaction take? */
1097         gettimeofday(&tx_finish, NULL);
1098
1099         lprintf(9, "Transaction completed in %ld.%06ld seconds.\n",
1100                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
1101                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000
1102         );
1103 }
1104
1105
1106 /*
1107  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1108  */
1109 void sleeeeeeeeeep(int seconds)
1110 {
1111         struct timeval tv;
1112
1113         tv.tv_sec = seconds;
1114         tv.tv_usec = 0;
1115         select(0, NULL, NULL, NULL, &tv);
1116 }
1117
1118
1119 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1120 {
1121         wcsession *WCC = WC;
1122         if (WCC != NULL)
1123                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
1124                         (StrLength(WCC->ImportantMsg) > 0));
1125         else
1126                 return 0;
1127 }
1128
1129 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1130 {
1131         wcsession *WCC = WC;
1132
1133         if (WCC != NULL) {
1134                 if (!IsEmptyStr(WCC->ImportantMessage)) {
1135                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1136                         WCC->ImportantMessage[0] = '\0';
1137                 }
1138                 else if (StrLength(WCC->ImportantMsg) > 0) {
1139                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
1140                         FlushStrBuf(WCC->ImportantMsg);
1141                 }
1142         }
1143 }
1144
1145 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1146 {
1147         wcsession *WCC = WC;
1148
1149         if (WCC != NULL)
1150                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1151 }
1152
1153 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1154 {
1155         extern StrBuf *csslocal;
1156         StrBufAppendBuf(Target,
1157                         csslocal, 0);
1158 }
1159
1160
1161
1162
1163 void
1164 InitModule_WEBCIT
1165 (void)
1166 {
1167         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1168         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1169         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1170         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1171
1172         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1173         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1174         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1175         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1176 }