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(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(char *titlebarcolor, char *titlebarmsg, 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         output_headers(0, 0, 0, 0, 1, 0);
 382         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 383         http_transmit_thing(ChrPtr(MimeType), 0);
 384 }
 385
 386
 387
 388 /*
 389  * convenience function to indicate success
 390  */
 391 void display_success(char *successmessage)
 392 {
 393         convenience_page("007700", "OK", successmessage);
 394 }
 395
 396
 397 /*
 398  * Authorization required page
 399  * This is probably temporary and should be revisited
 400  */
 401 void authorization_required(const char *message)
 402 {
 403         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 404         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 405         hprintf("Content-Type: text/html\r\n");
 406         wprintf("<h1>");
 407         wprintf(_("Authorization Required"));
 408         wprintf("</h1>\r\n");
 409         wprintf(_("The resource you requested requires a valid username and password. "
 410                 "You could not be logged in: %s\n"), message);
 411         wDumpContent(0);
 412
 413 }
 414
 415 /*
 416  * Convenience functions to wrap around asynchronous ajax responses
 417  */
 418 void begin_ajax_response(void) {
 419         wcsession *WCC = WC;
 420
 421         FlushStrBuf(WCC->HBuf);
 422         output_headers(0, 0, 0, 0, 0, 0);
 423
 424         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 425                 "Server: %s\r\n"
 426                 "Connection: close\r\n"
 427                 ,
 428                 PACKAGE_STRING);
 429         begin_burst();
 430 }
 431
 432 /*
 433  * print ajax response footer
 434  */
 435 void end_ajax_response(void) {
 436         wDumpContent(0);
 437 }
 438
 439 /*
 440  * Wraps a Citadel server command in an AJAX transaction.
 441  */
 442 void ajax_servcmd(void)
 443 {
 444         char buf[1024];
 445         char gcontent[1024];
 446         char *junk;
 447         size_t len;
 448
 449         begin_ajax_response();
 450
 451         serv_printf("%s", bstr("g_cmd"));
 452         serv_getln(buf, sizeof buf);
 453         wprintf("%s\n", buf);
 454
 455         if (buf[0] == '8') {
 456                 serv_printf("\n\n000");
 457         }
 458         if ((buf[0] == '1') || (buf[0] == '8')) {
 459                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 460                         wprintf("%s\n", gcontent);
 461                 }
 462                 wprintf("000");
 463         }
 464         if (buf[0] == '4') {
 465                 text_to_server(bstr("g_input"));
 466                 serv_puts("000");
 467         }
 468         if (buf[0] == '6') {
 469                 len = atol(&buf[4]);
 470                 junk = malloc(len);
 471                 serv_read(junk, len);
 472                 free(junk);
 473         }
 474         if (buf[0] == '7') {
 475                 len = atol(&buf[4]);
 476                 junk = malloc(len);
 477                 memset(junk, 0, len);
 478                 serv_write(junk, len);
 479                 free(junk);
 480         }
 481
 482         end_ajax_response();
 483
 484         /*
 485          * This is kind of an ugly hack, but this is the only place it can go.
 486          * If the command was GEXP, then the instant messenger window must be
 487          * running, so reset the "last_pager_check" watchdog timer so
 488          * that page_popup() doesn't try to open it a second time.
 489          */
 490         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 491                 WC->last_pager_check = time(NULL);
 492         }
 493 }
 494
 495
 496 /*
 497  * Helper function for the asynchronous check to see if we need
 498  * to open the instant messenger window.
 499  */
 500 void seconds_since_last_gexp(void)
 501 {
 502         char buf[256];
 503
 504         if ( (time(NULL) - WC->last_pager_check) < 30) {
 505                 wprintf("NO\n");
 506         }
 507         else {
 508                 memset(buf, 0, 5);
 509                 serv_puts("NOOP");
 510                 serv_getln(buf, sizeof buf);
 511                 if (buf[3] == '*') {
 512                         wprintf("YES");
 513                 }
 514                 else {
 515                         wprintf("NO");
 516                 }
 517         }
 518 }
 519
 520 /**
 521  * \brief Detects a 'mobile' user agent
 522  */
 523 int is_mobile_ua(char *user_agent) {
 524       if (strstr(user_agent,"iPhone OS") != NULL) {
 525         return 1;
 526       } else if (strstr(user_agent,"Windows CE") != NULL) {
 527         return 1;
 528       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 529         return 1;
 530       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 531         return 1;
 532       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 533               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 534           return 1;
 535           }
 536       return 0;
 537 }
 538
 539
 540 /*
 541  * Entry point for WebCit transaction
 542  */
 543 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
 544 {
 545         StrBuf *Buf;
 546         const char *pch, *pchs, *pche;
 547         void *vLine;
 548         char action[1024];
 549         char arg[8][128];
 550         size_t sizes[10];
 551         char *index[10];
 552         char buf[SIZ];
 553         int a, nBackDots, nEmpty;
 554         int ContentLength = 0;
 555         StrBuf *ContentType = NULL;
 556         StrBuf *UrlLine = NULL;
 557         StrBuf *content = NULL;
 558         const char *content_end = NULL;
 559         StrBuf *browser_host = NULL;
 560         char user_agent[256];
 561         int body_start = 0;
 562         int is_static = 0;
 563         int n_static = 0;
 564         int len = 0;
 565         void *vHandler;
 566         WebcitHandler *Handler;
 567
 568         /*
 569          * We stuff these with the values coming from the client cookies,
 570          * so we can use them to reconnect a timed out session if we have to.
 571          */
 572         StrBuf *c_username;
 573         StrBuf *c_password;
 574         StrBuf *c_roomname;
 575         char c_httpauth_string[SIZ];
 576         StrBuf *c_httpauth_user;
 577         StrBuf *c_httpauth_pass;
 578         wcsession *WCC;
 579
 580         Buf = NewStrBuf();
 581         c_username = NewStrBuf();
 582         c_password = NewStrBuf();
 583         c_roomname = NewStrBuf();
 584         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 585         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 586         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 587
 588         WCC= WC;
 589         if (WCC->WBuf == NULL)
 590                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 591         FlushStrBuf(WCC->WBuf);
 592
 593         if (WCC->HBuf == NULL)
 594                 WCC->HBuf = NewStrBuf();
 595         FlushStrBuf(WCC->HBuf);
 596
 597         WCC->upload_length = 0;
 598         WCC->upload = NULL;
 599         WCC->is_mobile = 0;
 600         WCC->trailing_javascript = NewStrBuf();
 601         WCC->nWildfireHeaders = 0;
 602
 603         /** Figure out the action */
 604         index[0] = action;
 605         sizes[0] = sizeof action;
 606         for (a=1; a<9; a++)
 607         {
 608                 index[a] = arg[a-1];
 609                 sizes[a] = sizeof arg[a-1];
 610         }
 611         nBackDots = 0;
 612         nEmpty = 0;
 613         for ( a = 0; a < 9; ++a)
 614         {
 615                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 616                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 617                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 618                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 619                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 620                         nBackDots++;
 621                 if (index[a][0] == '\0')
 622                         nEmpty++;
 623         }
 624
 625
 626         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 627             (vLine != NULL)){
 628                 cookie_to_stuff((StrBuf *)vLine, NULL,
 629                                 c_username,
 630                                 c_password,
 631                                 c_roomname);
 632         }
 633         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 634             (vLine!=NULL)) {
 635                 StrBufDecodeBase64((StrBuf*)vLine);
 636                 StrBufExtract_token(c_httpauth_user, (StrBuf*)vLine, 0, ':');
 637                 StrBufExtract_token(c_httpauth_pass, (StrBuf*)vLine, 1, ':');
 638         }
 639         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 640             (vLine!=NULL)) {
 641                 ContentLength = StrToi((StrBuf*)vLine);
 642         }
 643         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 644             (vLine!=NULL)) {
 645                 ContentType = (StrBuf*)vLine;
 646         }
 647         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 648             (vLine!=NULL)) {
 649                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 650 #ifdef TECH_PREVIEW
 651                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 652                         WCC->is_mobile = 1;
 653                 }
 654                 else {
 655                         WCC->is_mobile = 0;
 656                 }
 657 #endif
 658         }
 659         if ((follow_xff) &&
 660             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 661             (vLine != NULL)) {
 662                 WCC->http_host = (StrBuf*)vLine;
 663         }
 664         if ((StrLength(WCC->http_host) == 0) &&
 665             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 666             (vLine!=NULL)) {
 667                 WCC->http_host = (StrBuf*)vLine;
 668         }
 669
 670         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 671             (vLine!=NULL)) {
 672                 browser_host = (StrBuf*) vLine;
 673
 674                 while (StrBufNum_tokens(browser_host, ',') > 1) {
 675                         StrBufRemove_token(browser_host, 0, ',');
 676                 }
 677                 StrBufTrim(browser_host);
 678         }
 679
 680         if (ContentLength > 0) {
 681                 content = NewStrBuf();
 682                 StrBufPrintf(content, "Content-type: %s\n"
 683                          "Content-length: %d\n\n",
 684                          ChrPtr(ContentType), ContentLength);
 685 /*
 686                 hprintf("Content-type: %s\n"
 687                         "Content-length: %d\n\n",
 688                         ContentType, ContentLength);
 689 */
 690                 body_start = StrLength(content);
 691
 692                 /** Read the entire input data at once. */
 693                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
 694
 695                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 696                         StrBufCutLeft(content, body_start);
 697                         ParseURLParams(content);
 698                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 699                         content_end = ChrPtr(content) + ContentLength + body_start;
 700                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 701                 }
 702         } else {
 703                 content = NULL;
 704         }
 705
 706         /* make a note of where we are in case the user wants to save it */
 707         WCC->this_page = NewStrBufDup(ReqLine);
 708         StrBufRemove_token(WCC->this_page, 2, ' ');
 709         StrBufRemove_token(WCC->this_page, 0, ' ');
 710
 711         /* If there are variables in the URL, we must grab them now */
 712         UrlLine = NewStrBufDup(ReqLine);
 713         len = StrLength(UrlLine);
 714         pch = pchs = ChrPtr(UrlLine);
 715         pche = pchs + len;
 716         while (pch < pche) {
 717                 if ((*pch == '?') || (*pch == '&')) {
 718                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 719                         ParseURLParams(UrlLine);
 720                         break;
 721                 }
 722                 pch ++;
 723         }
 724         FreeStrBuf(&UrlLine);
 725
 726         /* If it's a "force 404" situation then display the error and bail. */
 727         if (!strcmp(action, "404")) {
 728                 hprintf("HTTP/1.1 404 Not found\r\n");
 729                 hprintf("Content-Type: text/plain\r\n");
 730                 wprintf("Not found\r\n");
 731                 end_burst();
 732                 goto SKIP_ALL_THIS_CRAP;
 733         }
 734
 735         /* Static content can be sent without connecting to Citadel. */
 736         is_static = 0;
 737         for (a=0; a<ndirs && ! is_static; ++a) {
 738                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 739                         is_static = 1;
 740                         n_static = a;
 741                 }
 742         }
 743         if (is_static) {
 744                 if (nBackDots < 2)
 745                 {
 746                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 747                                  static_dirs[n_static],
 748                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 749                         for (a=0; a<8; ++a) {
 750                                 if (buf[strlen(buf)-1] == '/') {
 751                                         buf[strlen(buf)-1] = 0;
 752                                 }
 753                         }
 754                         for (a = 0; a < strlen(buf); ++a) {
 755                                 if (isspace(buf[a])) {
 756                                         buf[a] = 0;
 757                                 }
 758                         }
 759                         output_static(buf);
 760                 }
 761                 else
 762                 {
 763                         lprintf(9, "Suspicious request. Ignoring.");
 764                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 765                         hprintf("Content-Type: text/plain\r\n\r\n");
 766                         wprintf("You have sent a malformed or invalid request.\r\n");
 767                         end_burst();
 768                 }
 769                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 770         }
 771
 772         /* If the client sent a nonce that is incorrect, kill the request. */
 773         if (strlen(bstr("nonce")) > 0) {
 774                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 775                         bstr("nonce"), WCC->nonce);
 776                 if (ibstr("nonce") != WCC->nonce) {
 777                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 778                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 779                         hprintf("Content-Type: text/plain\r\n\r\n");
 780                         wprintf("Security check failed.\r\n");
 781                         end_burst();
 782                         goto SKIP_ALL_THIS_CRAP;
 783                 }
 784         }
 785
 786         /*
 787          * If we're not connected to a Citadel server, try to hook up the
 788          * connection now.
 789          */
 790         if (!WCC->connected) {
 791                 if (WCC->ReadBuf == NULL)
 792                         WCC->ReadBuf = NewStrBuf();
 793                 if (!strcasecmp(ctdlhost, "uds")) {
 794                         /* unix domain socket */
 795                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 796                         WCC->serv_sock = uds_connectsock(buf);
 797                 }
 798                 else {
 799                         /* tcp socket */
 800                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 801                 }
 802
 803                 if (WCC->serv_sock < 0) {
 804                         do_logout();
 805                         FreeStrBuf(&WCC->ReadBuf);
 806                         goto SKIP_ALL_THIS_CRAP;
 807                 }
 808                 else {
 809                         WCC->connected = 1;
 810                         serv_getln(buf, sizeof buf);    /* get the server greeting */
 811
 812                         /* Are there too many users already logged in? */
 813                         if (!strncmp(buf, "571", 3)) {
 814                                 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."));
 815                                 end_burst();
 816                                 end_webcit_session();
 817                                 goto SKIP_ALL_THIS_CRAP;
 818                         }
 819
 820                         /*
 821                          * From what host is our user connecting?  Go with
 822                          * the host at the other end of the HTTP socket,
 823                          * unless we are following X-Forwarded-For: headers
 824                          * and such a header has already turned up something.
 825                          */
 826                         if ( (!follow_xff) || (StrLength(browser_host) == 0) ) {
 827                                 if (browser_host == NULL) {
 828                                         browser_host = NewStrBuf();
 829                                         Put(HTTPHeaders, HKEY("FreeMeWithTheOtherHeaders"),
 830                                             browser_host, HFreeStrBuf);
 831                                 }
 832                                 locate_host(browser_host, WCC->http_sock);
 833                         }
 834                         if (WCC->serv_info == NULL)
 835                                 WCC->serv_info = get_serv_info(browser_host, user_agent);
 836                         if (WCC->serv_info->serv_rev_level < MINIMUM_CIT_VERSION) {
 837                                 begin_burst();
 838                                 wprintf(_("You are connected to a Citadel "
 839                                         "server running Citadel %d.%02d. \n"
 840                                         "In order to run this version of WebCit "
 841                                         "you must also have Citadel %d.%02d or"
 842                                         " newer.\n\n\n"),
 843                                                 WCC->serv_info->serv_rev_level / 100,
 844                                                 WCC->serv_info->serv_rev_level % 100,
 845                                                 MINIMUM_CIT_VERSION / 100,
 846                                                 MINIMUM_CIT_VERSION % 100
 847                                         );
 848                                 hprintf("HTTP/1.1 200 OK\r\n");
 849                                 hprintf("Content-type: text/plain; charset=utf-8\r\n");
 850                                 end_burst();
 851                                 end_webcit_session();
 852                                 goto SKIP_ALL_THIS_CRAP;
 853                         }
 854                 }
 855         }
 856
 857         /*
 858          * Functions which can be performed without logging in
 859          */
 860         if (!strcasecmp(action, "listsub")) {
 861                 do_listsub();
 862                 goto SKIP_ALL_THIS_CRAP;
 863         }
 864         if (!strcasecmp(action, "freebusy")) {
 865                 do_freebusy(ChrPtr(ReqLine));
 866                 goto SKIP_ALL_THIS_CRAP;
 867         }
 868
 869         /*
 870          * If we're not logged in, but we have HTTP Authentication data,
 871          * try logging in to Citadel using that.
 872          */
 873         if ((!WCC->logged_in)
 874             && (StrLength(c_httpauth_user) > 0)
 875             && (StrLength(c_httpauth_pass) > 0))
 876         {
 877                 FlushStrBuf(Buf);
 878                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 879                 StrBuf_ServGetln(Buf);
 880                 if (GetServerStatus(Buf, NULL) == 3) {
 881                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 882                         StrBuf_ServGetln(Buf);
 883                         if (GetServerStatus(Buf, NULL) == 2) {
 884                                 become_logged_in(c_httpauth_user,
 885                                                 c_httpauth_pass, Buf);
 886                                 if (WCC->httpauth_user == NULL)
 887                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 888                                 else {
 889                                         FlushStrBuf(WCC->httpauth_user);
 890                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 891                                 }
 892                                 if (WCC->httpauth_pass == NULL)
 893                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 894                                 else {
 895                                         FlushStrBuf(WCC->httpauth_pass);
 896                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 897                                 }
 898                         } else {
 899                                 /* Should only display when password is wrong */
 900                                 authorization_required(&buf[4]);
 901                                 FreeStrBuf(&Buf);
 902                                 goto SKIP_ALL_THIS_CRAP;
 903                         }
 904                 }
 905         }
 906
 907         /* This needs to run early */
 908 #ifdef TECH_PREVIEW
 909         if (!strcasecmp(action, "rss")) {
 910                 display_rss(sbstr("room"), request_method);
 911                 goto SKIP_ALL_THIS_CRAP;
 912         }
 913 #endif
 914
 915         /*
 916          * The GroupDAV stuff relies on HTTP authentication instead of
 917          * our session's authentication.
 918          */
 919         if (!strncasecmp(action, "groupdav", 8)) {
 920                 groupdav_main(HTTPHeaders,
 921                               ReqLine, request_method,
 922                               ContentType, /* do GroupDAV methods */
 923                               ContentLength, content, body_start);
 924                 if (!WCC->logged_in) {
 925                         WCC->killthis = 1;      /* If not logged in, don't */
 926                 }                               /* keep the session active */
 927                 goto SKIP_ALL_THIS_CRAP;
 928         }
 929
 930
 931         /*
 932          * Automatically send requests with any method other than GET or
 933          * POST to the GroupDAV code as well.
 934          */
 935         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 936                 groupdav_main(HTTPHeaders, ReqLine,
 937                               request_method, ContentType, /** do GroupDAV methods */
 938                               ContentLength, content, body_start);
 939                 if (!WCC->logged_in) {
 940                         WCC->killthis = 1;      /** If not logged in, don't */
 941                 }                               /** keep the session active */
 942                 goto SKIP_ALL_THIS_CRAP;
 943         }
 944
 945         /*
 946          * If we're not logged in, but we have username and password cookies
 947          * supplied by the browser, try using them to log in.
 948          */
 949         if ((!WCC->logged_in)
 950            && (StrLength(c_username)>0)
 951            && (StrLength(c_password)>0)) {
 952                 serv_printf("USER %s", ChrPtr(c_username));
 953                 StrBuf_ServGetln(Buf);
 954                 if (GetServerStatus(Buf, NULL) == 3) {
 955                         serv_printf("PASS %s", ChrPtr(c_password));
 956                         StrBuf_ServGetln(Buf);
 957                         if (GetServerStatus(Buf, NULL) == 2) {
 958                                 become_logged_in(c_username, c_password, Buf);
 959                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 960                         }
 961                 }
 962         }
 963
 964         /*
 965          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 966          * prior to doing anything else.
 967          */
 968         if (havebstr("gotofirst")) {
 969                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 970         }
 971
 972         /*
 973          * If we don't have a current room, but a cookie specifying the
 974          * current room is supplied, make an effort to go there.
 975          */
 976         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 977                 serv_printf("GOTO %s", ChrPtr(c_roomname));
 978                 StrBuf_ServGetln(Buf);
 979                 if (GetServerStatus(Buf, NULL) == 2) {
 980                         if (WCC->wc_roomname == NULL) {
 981                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
 982                         }
 983                         else {
 984                                 FlushStrBuf(WCC->wc_roomname);
 985                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
 986                         }
 987                 }
 988         }
 989
 990         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 991                 Handler = (WebcitHandler*) vHandler;
 992         if (Handler != NULL) {
 993                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 994                         display_login(NULL);
 995                 }
 996                 else {
 997                         if((Handler->Flags & NEED_URL)) {
 998                                 if (WCC->UrlFragment1 == NULL)
 999                                         WCC->UrlFragment1 = NewStrBuf();
1000                                 if (WCC->UrlFragment2 == NULL)
1001                                         WCC->UrlFragment2 = NewStrBuf();
1002                                 if (WCC->UrlFragment3 == NULL)
1003                                         WCC->UrlFragment3 = NewStrBuf();
1004                                 if (WCC->UrlFragment4 == NULL)
1005                                         WCC->UrlFragment4 = NewStrBuf();
1006                                 StrBufPlain(WCC->UrlFragment1, index[0], -1);
1007                                 StrBufPlain(WCC->UrlFragment2, index[1], -1);
1008                                 StrBufPlain(WCC->UrlFragment3, index[2], -1);
1009                                 StrBufPlain(WCC->UrlFragment4, index[3], -1);
1010                         }
1011                         if ((Handler->Flags & AJAX) != 0)
1012                                 begin_ajax_response();
1013                         Handler->F();
1014                         if ((Handler->Flags & AJAX) != 0)
1015                                 end_ajax_response();
1016                 }
1017         }
1018         /* When all else fais, display the main menu. */
1019         else {
1020                 if (!WCC->logged_in)
1021                         display_login(NULL);
1022                 else
1023                         display_main_menu();
1024         }
1025
1026 SKIP_ALL_THIS_CRAP:
1027         if (WCC->SavePrefsToServer) {
1028                 save_preferences();
1029                 WCC->SavePrefsToServer = 0;
1030         }
1031         FreeStrBuf(&Buf);
1032         FreeStrBuf(&c_username);
1033         FreeStrBuf(&c_password);
1034         FreeStrBuf(&c_roomname);
1035         FreeStrBuf(&c_httpauth_user);
1036         FreeStrBuf(&c_httpauth_pass);
1037         FreeStrBuf(&WCC->this_page);
1038         fflush(stdout);
1039         if (content != NULL) {
1040                 FreeStrBuf(&content);
1041                 content = NULL;
1042         }
1043         DeleteHash(&WCC->urlstrings);
1044         if (WCC->upload_length > 0) {
1045                 free(WCC->upload);
1046                 WCC->upload_length = 0;
1047         }
1048         FreeStrBuf(&WCC->trailing_javascript);
1049         WCC->http_host = NULL;
1050 }
1051
1052
1053 /*
1054  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1055  */
1056 void sleeeeeeeeeep(int seconds)
1057 {
1058         struct timeval tv;
1059
1060         tv.tv_sec = seconds;
1061         tv.tv_usec = 0;
1062         select(0, NULL, NULL, NULL, &tv);
1063 }
1064
1065
1066 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1067 {
1068         wcsession *WCC = WC;
1069         if (WCC != NULL)
1070                 return (!IsEmptyStr(WCC->ImportantMessage));
1071         else
1072                 return 0;
1073 }
1074
1075 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1076 {
1077         wcsession *WCC = WC;
1078
1079         if (WCC != NULL) {
1080 /*
1081                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1082                                      WCC->ImportantMessage, 0);
1083 */
1084                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1085                 WCC->ImportantMessage[0] = '\0';
1086         }
1087 }
1088
1089 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1090 {
1091         wcsession *WCC = WC;
1092
1093         if (WCC != NULL)
1094                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1095 }
1096
1097 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1098 {
1099         extern StrBuf *csslocal;
1100         StrBufAppendBuf(Target,
1101                         csslocal, 0);
1102 }
1103
1104
1105
1106
1107 void
1108 InitModule_WEBCIT
1109 (void)
1110 {
1111         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1112         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1113         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1114         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1115
1116         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1117         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1118         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1119         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1120 }