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         char cookie[1024];
 112         char httpnow[128];
 113
 114         hprintf("HTTP/1.1 200 OK\n");
 115         http_datestring(httpnow, sizeof httpnow, time(NULL));
 116
 117         if (do_httpheaders) {
 118                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 119                         "Server: %s / %s\n"
 120                         "Connection: close\r\n",
 121                         PACKAGE_STRING,
 122                         ChrPtr(serv_info.serv_software)
 123                 );
 124         }
 125
 126         if (cache) {
 127                 char httpTomorow[128];
 128
 129                 http_datestring(httpTomorow, sizeof httpTomorow,
 130                                 time(NULL) + 60 * 60 * 24 * 2);
 131
 132                 hprintf("Pragma: public\r\n"
 133                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 134                         "Last-modified: %s\r\n"
 135                         "Expires: %s\r\n",
 136                         httpnow,
 137                         httpTomorow
 138                 );
 139         }
 140         else {
 141                 hprintf("Pragma: no-cache\r\n"
 142                         "Cache-Control: no-store\r\n"
 143                         "Expires: -1\r\n"
 144                 );
 145         }
 146
 147         stuff_to_cookie(cookie, 1024,
 148                         WC->wc_session, WC->wc_username,
 149                         WC->wc_password, WC->wc_roomname);
 150
 151         if (unset_cookies) {
 152                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 153         } else {
 154                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 155                 if (server_cookie != NULL) {
 156                         hprintf("%s\n", server_cookie);
 157                 }
 158         }
 159
 160         if (do_htmlhead) {
 161                 begin_burst();
 162                 do_template("head", NULL);
 163
 164                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 165                 if (!IsEmptyStr(WC->ImportantMessage)) {
 166                         wprintf("<div id=\"important_message\">\n"
 167                                 "<span class=\"imsg\">");
 168                         escputs(WC->ImportantMessage);
 169                         wprintf("</span><br />\n"
 170                                 "</div>\n"
 171                                 "<script type=\"text/javascript\">\n"
 172                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 173                                 "</script>\n");
 174                         WC->ImportantMessage[0] = 0;
 175                 }
 176
 177                 if ( (WC->logged_in) && (!unset_cookies) ) {
 178                         wprintf("<div id=\"iconbar\">");
 179                         do_selected_iconbar();
 180                         /** check for instant messages (these display in a new window) */
 181                         page_popup();
 182                         wprintf("</div>");
 183                 }
 184
 185                 if (do_room_banner == 1) {
 186                         wprintf("<div id=\"banner\">\n");
 187                         embed_room_banner(NULL, navbar_default);
 188                         wprintf("</div>\n");
 189                 }
 190         }
 191
 192         if (do_room_banner == 1) {
 193                 wprintf("<div id=\"content\">\n");
 194         }
 195 }
 196
 197
 198 /*
 199  * Generic function to do an HTTP redirect.  Easy and fun.
 200  */
 201 void http_redirect(const char *whichpage) {
 202         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 203         hprintf("Location: %s\r\n", whichpage);
 204         hprintf("URI: %s\r\n", whichpage);
 205         hprintf("Content-type: text/html; charset=utf-8\r\n");
 206         wprintf("<html><body>");
 207         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 208         wprintf("</body></html>\n");
 209         end_burst();
 210 }
 211
 212
 213
 214 /*
 215  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 216  */
 217 void http_transmit_thing(const char *content_type,
 218                          int is_static) {
 219
 220 #ifndef TECH_PREVIEW
 221         lprintf(9, "http_transmit_thing(%s)%s\n",
 222                 content_type,
 223                 (is_static ? " (static)" : "")
 224         );
 225 #endif
 226         output_headers(0, 0, 0, 0, 0, is_static);
 227
 228         hprintf("Content-type: %s\r\n"
 229                 "Server: %s\r\n"
 230                 "Connection: close\r\n",
 231                 content_type,
 232                 PACKAGE_STRING);
 233
 234         end_burst();
 235 }
 236
 237 /*
 238  * print menu box like used in the floor view or admin interface.
 239  * This function takes pair of strings as va_args,
 240  * Title        Title string of the box
 241  * Class        CSS Class for the box
 242  * nLines       How many string pairs should we print? (URL, UrlText)
 243  * ...          Pairs of URL Strings and their Names
 244  */
 245 void print_menu_box(char* Title, char *Class, int nLines, ...)
 246 {
 247         va_list arg_list;
 248         long i;
 249
 250         svput("BOXTITLE", WCS_STRING, Title);
 251         do_template("beginboxx", NULL);
 252
 253         wprintf("<ul class=\"%s\">", Class);
 254
 255         va_start(arg_list, nLines);
 256         for (i = 0; i < nLines; ++i)
 257         {
 258                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 259                 wprintf((char *) va_arg(arg_list, char *));
 260                 wprintf("</a></li>\n");
 261         }
 262         va_end (arg_list);
 263
 264         wprintf("</a></li>\n");
 265
 266         wprintf("</ul>");
 267
 268         do_template("endbox", NULL);
 269 }
 270
 271
 272 /*
 273  * dump out static pages from disk
 274  */
 275 void output_static(char *what)
 276 {
 277         int fd;
 278         struct stat statbuf;
 279         off_t bytes;
 280         off_t count = 0;
 281         const char *content_type;
 282         int len;
 283         const char *Err;
 284
 285         fd = open(what, O_RDONLY);
 286         if (fd <= 0) {
 287                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 288                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 289                 hprintf("Content-Type: text/plain\r\n");
 290                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 291                 end_burst();
 292         } else {
 293                 len = strlen (what);
 294                 content_type = GuessMimeByFilename(what, len);
 295
 296                 if (fstat(fd, &statbuf) == -1) {
 297                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 298                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 299                         hprintf("Content-Type: text/plain\r\n");
 300                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 301                         end_burst();
 302                         return;
 303                 }
 304
 305                 count = 0;
 306                 bytes = statbuf.st_size;
 307
 308                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 309                 {
 310                         if (fd > 0) close(fd);
 311                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 312                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 313                                 hprintf("Content-Type: text/plain\r\n");
 314                                 end_burst();
 315                                 return;
 316                 }
 317
 318
 319                 close(fd);
 320 #ifndef TECH_PREVIEW
 321                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 322 #endif
 323                 http_transmit_thing(content_type, 1);
 324         }
 325         if (yesbstr("force_close_session")) {
 326                 end_webcit_session();
 327         }
 328 }
 329
 330
 331 /*
 332  * Convenience functions to display a page containing only a string
 333  *
 334  * titlebarcolor        color of the titlebar of the frame
 335  * titlebarmsg          text to display in the title bar
 336  * messagetext          body of the box
 337  */
 338 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 339 {
 340         hprintf("HTTP/1.1 200 OK\n");
 341         output_headers(1, 1, 2, 0, 0, 0);
 342         wprintf("<div id=\"banner\">\n");
 343         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 344         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 345         wprintf("</td></tr></table>\n");
 346         wprintf("</div>\n<div id=\"content\">\n");
 347         escputs(messagetext);
 348
 349         wprintf("<hr />\n");
 350         wDumpContent(1);
 351 }
 352
 353
 354 /*
 355  * Display a blank page.
 356  */
 357 void blank_page(void) {
 358         output_headers(1, 1, 0, 0, 0, 0);
 359         wDumpContent(2);
 360 }
 361
 362
 363 /*
 364  * A template has been requested
 365  */
 366 void url_do_template(void) {
 367         const StrBuf *Tmpl = sbstr("template");
 368         begin_burst();
 369         output_headers(1, 0, 0, 0, 1, 0);
 370         DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 371         end_burst();
 372 }
 373
 374
 375
 376 /*
 377  * convenience function to indicate success
 378  */
 379 void display_success(char *successmessage)
 380 {
 381         convenience_page("007700", "OK", successmessage);
 382 }
 383
 384
 385 /*
 386  * Authorization required page
 387  * This is probably temporary and should be revisited
 388  */
 389 void authorization_required(const char *message)
 390 {
 391         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 392         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(serv_info.serv_humannode));
 393         hprintf("Content-Type: text/html\r\n");
 394         wprintf("<h1>");
 395         wprintf(_("Authorization Required"));
 396         wprintf("</h1>\r\n");
 397         wprintf(_("The resource you requested requires a valid username and password. "
 398                 "You could not be logged in: %s\n"), message);
 399         wDumpContent(0);
 400
 401 }
 402
 403 /*
 404  * Convenience functions to wrap around asynchronous ajax responses
 405  */
 406 void begin_ajax_response(void) {
 407         wcsession *WCC = WC;
 408
 409         FlushStrBuf(WCC->HBuf);
 410         output_headers(0, 0, 0, 0, 0, 0);
 411
 412         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 413                 "Server: %s\r\n"
 414                 "Connection: close\r\n"
 415                 ,
 416                 PACKAGE_STRING);
 417         begin_burst();
 418 }
 419
 420 /*
 421  * print ajax response footer
 422  */
 423 void end_ajax_response(void) {
 424         wDumpContent(0);
 425 }
 426
 427 /*
 428  * Wraps a Citadel server command in an AJAX transaction.
 429  */
 430 void ajax_servcmd(void)
 431 {
 432         char buf[1024];
 433         char gcontent[1024];
 434         char *junk;
 435         size_t len;
 436
 437         begin_ajax_response();
 438
 439         serv_printf("%s", bstr("g_cmd"));
 440         serv_getln(buf, sizeof buf);
 441         wprintf("%s\n", buf);
 442
 443         if (buf[0] == '8') {
 444                 serv_printf("\n\n000");
 445         }
 446         if ((buf[0] == '1') || (buf[0] == '8')) {
 447                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 448                         wprintf("%s\n", gcontent);
 449                 }
 450                 wprintf("000");
 451         }
 452         if (buf[0] == '4') {
 453                 text_to_server(bstr("g_input"));
 454                 serv_puts("000");
 455         }
 456         if (buf[0] == '6') {
 457                 len = atol(&buf[4]);
 458                 junk = malloc(len);
 459                 serv_read(junk, len);
 460                 free(junk);
 461         }
 462         if (buf[0] == '7') {
 463                 len = atol(&buf[4]);
 464                 junk = malloc(len);
 465                 memset(junk, 0, len);
 466                 serv_write(junk, len);
 467                 free(junk);
 468         }
 469
 470         end_ajax_response();
 471
 472         /*
 473          * This is kind of an ugly hack, but this is the only place it can go.
 474          * If the command was GEXP, then the instant messenger window must be
 475          * running, so reset the "last_pager_check" watchdog timer so
 476          * that page_popup() doesn't try to open it a second time.
 477          */
 478         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 479                 WC->last_pager_check = time(NULL);
 480         }
 481 }
 482
 483
 484 /*
 485  * Helper function for the asynchronous check to see if we need
 486  * to open the instant messenger window.
 487  */
 488 void seconds_since_last_gexp(void)
 489 {
 490         char buf[256];
 491
 492         if ( (time(NULL) - WC->last_pager_check) < 30) {
 493                 wprintf("NO\n");
 494         }
 495         else {
 496                 memset(buf, 0, 5);
 497                 serv_puts("NOOP");
 498                 serv_getln(buf, sizeof buf);
 499                 if (buf[3] == '*') {
 500                         wprintf("YES");
 501                 }
 502                 else {
 503                         wprintf("NO");
 504                 }
 505         }
 506 }
 507
 508 /**
 509  * \brief Detects a 'mobile' user agent
 510  */
 511 int is_mobile_ua(char *user_agent) {
 512       if (strstr(user_agent,"iPhone OS") != NULL) {
 513         return 1;
 514       } else if (strstr(user_agent,"Windows CE") != NULL) {
 515         return 1;
 516       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 517         return 1;
 518       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 519         return 1;
 520       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 521               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 522           return 1;
 523           }
 524       return 0;
 525 }
 526
 527
 528 /*
 529  * Entry point for WebCit transaction
 530  */
 531 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
 532 {
 533         StrBuf *Buf;
 534         const char *pch, *pchs, *pche;
 535         void *vLine;
 536         char action[1024];
 537         char arg[8][128];
 538         size_t sizes[10];
 539         char *index[10];
 540         char buf[SIZ];
 541         int a, nBackDots, nEmpty;
 542         int ContentLength = 0;
 543         StrBuf *ContentType = NULL;
 544         StrBuf *UrlLine = NULL;
 545         StrBuf *content = NULL;
 546         const char *content_end = NULL;
 547         char browser_host[256];
 548         char user_agent[256];
 549         int body_start = 0;
 550         int is_static = 0;
 551         int n_static = 0;
 552         int len = 0;
 553         void *vHandler;
 554         WebcitHandler *Handler;
 555
 556         /*
 557          * We stuff these with the values coming from the client cookies,
 558          * so we can use them to reconnect a timed out session if we have to.
 559          */
 560         StrBuf *c_username;
 561         StrBuf *c_password;
 562         StrBuf *c_roomname;
 563         char c_httpauth_string[SIZ];
 564         StrBuf *c_httpauth_user;
 565         StrBuf *c_httpauth_pass;
 566         wcsession *WCC;
 567
 568         Buf = NewStrBuf();
 569         c_username = NewStrBuf();
 570         c_password = NewStrBuf();
 571         c_roomname = NewStrBuf();
 572         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 573         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 574         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 575         strcpy(browser_host, "");
 576
 577         WCC= WC;
 578         if (WCC->WBuf == NULL)
 579                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 580         FlushStrBuf(WCC->WBuf);
 581
 582         if (WCC->HBuf == NULL)
 583                 WCC->HBuf = NewStrBuf();
 584         FlushStrBuf(WCC->HBuf);
 585
 586         WCC->upload_length = 0;
 587         WCC->upload = NULL;
 588         WCC->is_mobile = 0;
 589         WCC->trailing_javascript = NewStrBuf();
 590
 591         /** Figure out the action */
 592         index[0] = action;
 593         sizes[0] = sizeof action;
 594         for (a=1; a<9; a++)
 595         {
 596                 index[a] = arg[a-1];
 597                 sizes[a] = sizeof arg[a-1];
 598         }
 599 /*///   index[9] = &foo; todo */
 600         nBackDots = 0;
 601         nEmpty = 0;
 602         for ( a = 0; a < 9; ++a)
 603         {
 604                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 605                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 606                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 607                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 608                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 609                         nBackDots++;
 610                 if (index[a][0] == '\0')
 611                         nEmpty++;
 612         }
 613
 614
 615         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 616             (vLine != NULL)){
 617                 cookie_to_stuff((StrBuf *)vLine, NULL,
 618                                 c_username,
 619                                 c_password,
 620                                 c_roomname);
 621         }
 622         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 623             (vLine!=NULL)) {
 624 /* TODO: wrap base64 in strbuf */
 625                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
 626                 FlushStrBuf(Buf);
 627                 StrBufAppendBufPlain(Buf, c_httpauth_string, -1, 0);
 628                 StrBufExtract_token(c_httpauth_user, Buf, 0, ':');
 629                 StrBufExtract_token(c_httpauth_pass, Buf, 1, ':');
 630         }
 631         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 632             (vLine!=NULL)) {
 633                 ContentLength = StrToi((StrBuf*)vLine);
 634         }
 635         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 636             (vLine!=NULL)) {
 637                 ContentType = (StrBuf*)vLine;
 638         }
 639         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 640             (vLine!=NULL)) {
 641                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 642 #ifdef TECH_PREVIEW
 643                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 644                         WCC->is_mobile = 1;
 645                 }
 646                 else {
 647                         WCC->is_mobile = 0;
 648                 }
 649 #endif
 650         }
 651         if ((follow_xff) &&
 652             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 653             (vLine != NULL)) {
 654                 safestrncpy(WCC->http_host,
 655                             ChrPtr((StrBuf*)vLine),
 656                             sizeof WCC->http_host);
 657         }
 658         if (IsEmptyStr(WCC->http_host) &&
 659             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 660             (vLine!=NULL)) {
 661                 safestrncpy(WCC->http_host,
 662                             ChrPtr((StrBuf*)vLine),
 663                             sizeof WCC->http_host);
 664
 665         }
 666         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 667             (vLine!=NULL)) {
 668                 safestrncpy(browser_host,
 669                             ChrPtr((StrBuf*) vLine),
 670                             sizeof browser_host);
 671                 while (num_tokens(browser_host, ',') > 1) {
 672                         remove_token(browser_host, 0, ',');
 673                 }
 674                 striplt(browser_host);
 675         }
 676
 677         if (ContentLength > 0) {
 678                 content = NewStrBuf();
 679                 StrBufPrintf(content, "Content-type: %s\n"
 680                          "Content-length: %d\n\n",
 681                          ChrPtr(ContentType), ContentLength);
 682 /*
 683                 hprintf("Content-type: %s\n"
 684                         "Content-length: %d\n\n",
 685                         ContentType, ContentLength);
 686 */
 687                 body_start = StrLength(content);
 688
 689                 /** Read the entire input data at once. */
 690                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
 691
 692                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 693                         StrBufCutLeft(content, body_start);
 694                         ParseURLParams(content);
 695                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 696                         content_end = ChrPtr(content) + ContentLength + body_start;
 697                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 698                 }
 699         } else {
 700                 content = NULL;
 701         }
 702
 703         /* make a note of where we are in case the user wants to save it */
 704         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
 705         remove_token(WCC->this_page, 2, ' ');
 706         remove_token(WCC->this_page, 0, ' ');
 707
 708         /* If there are variables in the URL, we must grab them now */
 709         UrlLine = NewStrBufDup(ReqLine);
 710         len = StrLength(UrlLine);
 711         pch = pchs = ChrPtr(UrlLine);
 712         pche = pchs + len;
 713         while (pch < pche) {
 714                 if ((*pch == '?') || (*pch == '&')) {
 715                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 716                         ParseURLParams(UrlLine);
 717                         break;
 718                 }
 719                 pch ++;
 720         }
 721         FreeStrBuf(&UrlLine);
 722
 723         /* If it's a "force 404" situation then display the error and bail. */
 724         if (!strcmp(action, "404")) {
 725                 hprintf("HTTP/1.1 404 Not found\r\n");
 726                 hprintf("Content-Type: text/plain\r\n");
 727                 wprintf("Not found\r\n");
 728                 end_burst();
 729                 goto SKIP_ALL_THIS_CRAP;
 730         }
 731
 732         /* Static content can be sent without connecting to Citadel. */
 733         is_static = 0;
 734         for (a=0; a<ndirs && ! is_static; ++a) {
 735                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 736                         is_static = 1;
 737                         n_static = a;
 738                 }
 739         }
 740         if (is_static) {
 741                 if (nBackDots < 2)
 742                 {
 743                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 744                                  static_dirs[n_static],
 745                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 746                         for (a=0; a<8; ++a) {
 747                                 if (buf[strlen(buf)-1] == '/') {
 748                                         buf[strlen(buf)-1] = 0;
 749                                 }
 750                         }
 751                         for (a = 0; a < strlen(buf); ++a) {
 752                                 if (isspace(buf[a])) {
 753                                         buf[a] = 0;
 754                                 }
 755                         }
 756                         output_static(buf);
 757                 }
 758                 else
 759                 {
 760                         lprintf(9, "Suspicious request. Ignoring.");
 761                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 762                         hprintf("Content-Type: text/plain\r\n\r\n");
 763                         wprintf("You have sent a malformed or invalid request.\r\n");
 764                         end_burst();
 765                 }
 766                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 767         }
 768
 769         /* If the client sent a nonce that is incorrect, kill the request. */
 770         if (strlen(bstr("nonce")) > 0) {
 771                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 772                         bstr("nonce"), WCC->nonce);
 773                 if (ibstr("nonce") != WCC->nonce) {
 774                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 775                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 776                         hprintf("Content-Type: text/plain\r\n\r\n");
 777                         wprintf("Security check failed.\r\n");
 778                         end_burst();
 779                         goto SKIP_ALL_THIS_CRAP;
 780                 }
 781         }
 782
 783         /*
 784          * If we're not connected to a Citadel server, try to hook up the
 785          * connection now.
 786          */
 787         if (!WCC->connected) {
 788                 if (!strcasecmp(ctdlhost, "uds")) {
 789                         /* unix domain socket */
 790                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 791                         WCC->serv_sock = uds_connectsock(buf);
 792                 }
 793                 else {
 794                         /* tcp socket */
 795                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 796                 }
 797
 798                 if (WCC->serv_sock < 0) {
 799                         do_logout();
 800                         goto SKIP_ALL_THIS_CRAP;
 801                 }
 802                 else {
 803                         WCC->connected = 1;
 804                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
 805
 806                         /**
 807                          * From what host is our user connecting?  Go with
 808                          * the host at the other end of the HTTP socket,
 809                          * unless we are following X-Forwarded-For: headers
 810                          * and such a header has already turned up something.
 811                          */
 812                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
 813                                 locate_host(browser_host, WCC->http_sock);
 814                         }
 815
 816                         get_serv_info(browser_host, user_agent);
 817                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 818                                 begin_burst();
 819                                 wprintf(_("You are connected to a Citadel "
 820                                         "server running Citadel %d.%02d. \n"
 821                                         "In order to run this version of WebCit "
 822                                         "you must also have Citadel %d.%02d or"
 823                                         " newer.\n\n\n"),
 824                                                 serv_info.serv_rev_level / 100,
 825                                                 serv_info.serv_rev_level % 100,
 826                                                 MINIMUM_CIT_VERSION / 100,
 827                                                 MINIMUM_CIT_VERSION % 100
 828                                         );
 829                                 end_burst();
 830                                 end_webcit_session();
 831                                 goto SKIP_ALL_THIS_CRAP;
 832                         }
 833                 }
 834         }
 835 /*///////todo: restore language in this case */
 836         /*
 837          * Functions which can be performed without logging in
 838          */
 839         if (!strcasecmp(action, "listsub")) {
 840                 do_listsub();
 841                 goto SKIP_ALL_THIS_CRAP;
 842         }
 843         if (!strcasecmp(action, "freebusy")) {
 844                 do_freebusy(ChrPtr(ReqLine));
 845                 goto SKIP_ALL_THIS_CRAP;
 846         }
 847
 848         /*
 849          * If we're not logged in, but we have HTTP Authentication data,
 850          * try logging in to Citadel using that.
 851          */
 852         if ((!WCC->logged_in)
 853             && (StrLength(c_httpauth_user) > 0)
 854             && (StrLength(c_httpauth_pass) > 0))
 855         {
 856                 FlushStrBuf(Buf);
 857                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 858                 StrBuf_ServGetln(Buf);
 859                 if (GetServerStatus(Buf, NULL) == 3) {
 860                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 861                         StrBuf_ServGetln(Buf);
 862                         if (GetServerStatus(Buf, NULL) == 2) {
 863                                 become_logged_in(c_httpauth_user,
 864                                                 c_httpauth_pass, Buf);
 865                                 if (WCC->httpauth_user == NULL)
 866                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 867                                 else {
 868                                         FlushStrBuf(WCC->httpauth_user);
 869                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 870                                 }
 871                                 if (WCC->httpauth_pass == NULL)
 872                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 873                                 else {
 874                                         FlushStrBuf(WCC->httpauth_pass);
 875                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 876                                 }
 877                         } else {
 878                                 /* Should only display when password is wrong */
 879                                 authorization_required(&buf[4]);
 880                                 FreeStrBuf(&Buf);
 881                                 goto SKIP_ALL_THIS_CRAP;
 882                         }
 883                 }
 884         }
 885
 886         /* This needs to run early */
 887 #ifdef TECH_PREVIEW
 888         if (!strcasecmp(action, "rss")) {
 889                 display_rss(sbstr("room"), request_method);
 890                 goto SKIP_ALL_THIS_CRAP;
 891         }
 892 #endif
 893
 894         /*
 895          * The GroupDAV stuff relies on HTTP authentication instead of
 896          * our session's authentication.
 897          */
 898         if (!strncasecmp(action, "groupdav", 8)) {
 899                 groupdav_main(HTTPHeaders,
 900                               ReqLine, request_method,
 901                               ContentType, /* do GroupDAV methods */
 902                               ContentLength, content, body_start);
 903                 if (!WCC->logged_in) {
 904                         WCC->killthis = 1;      /* If not logged in, don't */
 905                 }                               /* keep the session active */
 906                 goto SKIP_ALL_THIS_CRAP;
 907         }
 908
 909
 910         /*
 911          * Automatically send requests with any method other than GET or
 912          * POST to the GroupDAV code as well.
 913          */
 914         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 915                 groupdav_main(HTTPHeaders, ReqLine,
 916                               request_method, ContentType, /** do GroupDAV methods */
 917                               ContentLength, content, body_start);
 918                 if (!WCC->logged_in) {
 919                         WCC->killthis = 1;      /** If not logged in, don't */
 920                 }                               /** keep the session active */
 921                 goto SKIP_ALL_THIS_CRAP;
 922         }
 923
 924         /*
 925          * If we're not logged in, but we have username and password cookies
 926          * supplied by the browser, try using them to log in.
 927          */
 928         if ((!WCC->logged_in)
 929            && (StrLength(c_username)>0)
 930            && (StrLength(c_password)>0)) {
 931                 serv_printf("USER %s", ChrPtr(c_username));
 932                 StrBuf_ServGetln(Buf);
 933                 if (GetServerStatus(Buf, NULL) == 3) {
 934                         serv_printf("PASS %s", ChrPtr(c_password));
 935                         StrBuf_ServGetln(Buf);
 936                         if (GetServerStatus(Buf, NULL) == 2) {
 937                                 StrBuf *Lang;
 938                                 become_logged_in(c_username, c_password, Buf);
 939                                 if (get_preference("language", &Lang)) {
 940                                         set_selected_language(ChrPtr(Lang));
 941                                         go_selected_language();         /* set locale */
 942                                 }
 943                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 944                         }
 945                 }
 946         }
 947
 948         /*
 949          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 950          * prior to doing anything else.
 951          */
 952         if (havebstr("gotofirst")) {
 953                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 954         }
 955
 956         /*
 957          * If we don't have a current room, but a cookie specifying the
 958          * current room is supplied, make an effort to go there.
 959          */
 960         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 961                 serv_printf("GOTO %s", ChrPtr(c_roomname));
 962                 StrBuf_ServGetln(Buf);
 963                 if (GetServerStatus(Buf, NULL) == 2) {
 964                         if (WCC->wc_roomname == NULL) {
 965                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
 966                         }
 967                         else {
 968                                 FlushStrBuf(WCC->wc_roomname);
 969                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
 970                         }
 971                 }
 972         }
 973
 974         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 975                 Handler = (WebcitHandler*) vHandler;
 976         if (Handler != NULL) {
 977                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 978                         display_login(NULL);
 979                 }
 980                 else {
 981                         if((Handler->Flags & NEED_URL)) {
 982                                 if (WCC->UrlFragment1 == NULL)
 983                                         WCC->UrlFragment1 = NewStrBuf();
 984                                 if (WCC->UrlFragment2 == NULL)
 985                                         WCC->UrlFragment2 = NewStrBuf();
 986                                 if (WCC->UrlFragment3 == NULL)
 987                                         WCC->UrlFragment3 = NewStrBuf();
 988                                 StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
 989                                 StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
 990                                 StrBufPrintf(WCC->UrlFragment3, "%s", index[2]);
 991                         }
 992                         if ((Handler->Flags & AJAX) != 0)
 993                                 begin_ajax_response();
 994                         Handler->F();
 995                         if ((Handler->Flags & AJAX) != 0)
 996                                 end_ajax_response();
 997                 }
 998         }
 999         /* When all else fais, display the main menu. */
1000         else {
1001                 if (!WCC->logged_in)
1002                         display_login(NULL);
1003                 else
1004                         display_main_menu();
1005         }
1006
1007 SKIP_ALL_THIS_CRAP:
1008         FreeStrBuf(&Buf);
1009         FreeStrBuf(&c_username);
1010         FreeStrBuf(&c_password);
1011         FreeStrBuf(&c_roomname);
1012         FreeStrBuf(&c_httpauth_user);
1013         FreeStrBuf(&c_httpauth_pass);
1014         fflush(stdout);
1015         if (content != NULL) {
1016                 FreeStrBuf(&content);
1017                 content = NULL;
1018         }
1019         DeleteHash(&WCC->urlstrings);
1020         if (WCC->upload_length > 0) {
1021                 free(WCC->upload);
1022                 WCC->upload_length = 0;
1023         }
1024         FreeStrBuf(&WCC->trailing_javascript);
1025 }
1026
1027
1028 /*
1029  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1030  */
1031 void sleeeeeeeeeep(int seconds)
1032 {
1033         struct timeval tv;
1034
1035         tv.tv_sec = seconds;
1036         tv.tv_usec = 0;
1037         select(0, NULL, NULL, NULL, &tv);
1038 }
1039
1040
1041 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1042 {
1043         wcsession *WCC = WC;
1044         if (WCC != NULL)
1045                 return (!IsEmptyStr(WCC->ImportantMessage));
1046         else
1047                 return 0;
1048 }
1049
1050 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1051 {
1052         wcsession *WCC = WC;
1053
1054         if (WCC != NULL) {
1055 /*
1056                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1057                                      WCC->ImportantMessage, 0);
1058 */
1059                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1060                 WCC->ImportantMessage[0] = '\0';
1061         }
1062 }
1063
1064 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1065 {
1066         wcsession *WCC = WC;
1067
1068         if (WCC != NULL)
1069                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1070 }
1071
1072 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1073 {
1074         extern StrBuf *csslocal;
1075         StrBufAppendBuf(Target,
1076                         csslocal, 0);
1077 }
1078
1079
1080
1081
1082 void
1083 InitModule_WEBCIT
1084 (void)
1085 {
1086         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1087         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1088         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1089         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1090
1091         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1092         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1093         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1094         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1095 }