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