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                   DoTemplate(HKEY("iconbar"), NULL, &NoCtx);
 179                 }
 180
 181                 if (do_room_banner == 1) {
 182                         wprintf("<div id=\"banner\">\n");
 183                         embed_room_banner(NULL, navbar_default);
 184                         wprintf("</div>\n");
 185                 }
 186         }
 187
 188         if (do_room_banner == 1) {
 189                 wprintf("<div id=\"content\">\n");
 190         }
 191 }
 192
 193 void output_custom_content_header(const char *ctype) {
 194   hprintf("HTTP/1.1 200 OK\r\n");
 195   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 196   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(serv_info.serv_software));
 197   hprintf("Connection: close\r\n");
 198 }
 199
 200
 201 /*
 202  * Generic function to do an HTTP redirect.  Easy and fun.
 203  */
 204 void http_redirect(const char *whichpage) {
 205         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 206         hprintf("Location: %s\r\n", whichpage);
 207         hprintf("URI: %s\r\n", whichpage);
 208         hprintf("Content-type: text/html; charset=utf-8\r\n");
 209         wprintf("<html><body>");
 210         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 211         wprintf("</body></html>\n");
 212         end_burst();
 213 }
 214
 215
 216
 217 /*
 218  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 219  */
 220 void http_transmit_thing(const char *content_type,
 221                          int is_static) {
 222
 223 #ifndef TECH_PREVIEW
 224         lprintf(9, "http_transmit_thing(%s)%s\n",
 225                 content_type,
 226                 (is_static ? " (static)" : "")
 227         );
 228 #endif
 229         output_headers(0, 0, 0, 0, 0, is_static);
 230
 231         hprintf("Content-type: %s\r\n"
 232                 "Server: %s\r\n"
 233                 "Connection: close\r\n",
 234                 content_type,
 235                 PACKAGE_STRING);
 236
 237         end_burst();
 238 }
 239
 240 /*
 241  * print menu box like used in the floor view or admin interface.
 242  * This function takes pair of strings as va_args,
 243  * Title        Title string of the box
 244  * Class        CSS Class for the box
 245  * nLines       How many string pairs should we print? (URL, UrlText)
 246  * ...          Pairs of URL Strings and their Names
 247  */
 248 void print_menu_box(char* Title, char *Class, int nLines, ...)
 249 {
 250         va_list arg_list;
 251         long i;
 252
 253         svput("BOXTITLE", WCS_STRING, Title);
 254         do_template("beginboxx", NULL);
 255
 256         wprintf("<ul class=\"%s\">", Class);
 257
 258         va_start(arg_list, nLines);
 259         for (i = 0; i < nLines; ++i)
 260         {
 261                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 262                 wprintf((char *) va_arg(arg_list, char *));
 263                 wprintf("</a></li>\n");
 264         }
 265         va_end (arg_list);
 266
 267         wprintf("</a></li>\n");
 268
 269         wprintf("</ul>");
 270
 271         do_template("endbox", NULL);
 272 }
 273
 274
 275 /*
 276  * dump out static pages from disk
 277  */
 278 void output_static(char *what)
 279 {
 280         int fd;
 281         struct stat statbuf;
 282         off_t bytes;
 283         off_t count = 0;
 284         const char *content_type;
 285         int len;
 286         const char *Err;
 287
 288         fd = open(what, O_RDONLY);
 289         if (fd <= 0) {
 290                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 291                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 292                 hprintf("Content-Type: text/plain\r\n");
 293                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 294                 end_burst();
 295         } else {
 296                 len = strlen (what);
 297                 content_type = GuessMimeByFilename(what, len);
 298
 299                 if (fstat(fd, &statbuf) == -1) {
 300                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 301                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 302                         hprintf("Content-Type: text/plain\r\n");
 303                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 304                         end_burst();
 305                         return;
 306                 }
 307
 308                 count = 0;
 309                 bytes = statbuf.st_size;
 310
 311                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 312                 {
 313                         if (fd > 0) close(fd);
 314                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 315                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 316                                 hprintf("Content-Type: text/plain\r\n");
 317                                 end_burst();
 318                                 return;
 319                 }
 320
 321
 322                 close(fd);
 323 #ifndef TECH_PREVIEW
 324                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 325 #endif
 326                 http_transmit_thing(content_type, 1);
 327         }
 328         if (yesbstr("force_close_session")) {
 329                 end_webcit_session();
 330         }
 331 }
 332
 333
 334 /*
 335  * Convenience functions to display a page containing only a string
 336  *
 337  * titlebarcolor        color of the titlebar of the frame
 338  * titlebarmsg          text to display in the title bar
 339  * messagetext          body of the box
 340  */
 341 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 342 {
 343         hprintf("HTTP/1.1 200 OK\n");
 344         output_headers(1, 1, 2, 0, 0, 0);
 345         wprintf("<div id=\"banner\">\n");
 346         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 347         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 348         wprintf("</td></tr></table>\n");
 349         wprintf("</div>\n<div id=\"content\">\n");
 350         escputs(messagetext);
 351
 352         wprintf("<hr />\n");
 353         wDumpContent(1);
 354 }
 355
 356
 357 /*
 358  * Display a blank page.
 359  */
 360 void blank_page(void) {
 361         output_headers(1, 1, 0, 0, 0, 0);
 362         wDumpContent(2);
 363 }
 364
 365
 366 /*
 367  * A template has been requested
 368  */
 369 void url_do_template(void) {
 370         const StrBuf *Tmpl = sbstr("template");
 371         begin_burst();
 372         output_headers(1, 0, 0, 0, 1, 0);
 373         DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 374         end_burst();
 375 }
 376
 377
 378
 379 /*
 380  * convenience function to indicate success
 381  */
 382 void display_success(char *successmessage)
 383 {
 384         convenience_page("007700", "OK", successmessage);
 385 }
 386
 387
 388 /*
 389  * Authorization required page
 390  * This is probably temporary and should be revisited
 391  */
 392 void authorization_required(const char *message)
 393 {
 394         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 395         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(serv_info.serv_humannode));
 396         hprintf("Content-Type: text/html\r\n");
 397         wprintf("<h1>");
 398         wprintf(_("Authorization Required"));
 399         wprintf("</h1>\r\n");
 400         wprintf(_("The resource you requested requires a valid username and password. "
 401                 "You could not be logged in: %s\n"), message);
 402         wDumpContent(0);
 403
 404 }
 405
 406 /*
 407  * Convenience functions to wrap around asynchronous ajax responses
 408  */
 409 void begin_ajax_response(void) {
 410         wcsession *WCC = WC;
 411
 412         FlushStrBuf(WCC->HBuf);
 413         output_headers(0, 0, 0, 0, 0, 0);
 414
 415         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 416                 "Server: %s\r\n"
 417                 "Connection: close\r\n"
 418                 ,
 419                 PACKAGE_STRING);
 420         begin_burst();
 421 }
 422
 423 /*
 424  * print ajax response footer
 425  */
 426 void end_ajax_response(void) {
 427         wDumpContent(0);
 428 }
 429
 430 /*
 431  * Wraps a Citadel server command in an AJAX transaction.
 432  */
 433 void ajax_servcmd(void)
 434 {
 435         char buf[1024];
 436         char gcontent[1024];
 437         char *junk;
 438         size_t len;
 439
 440         begin_ajax_response();
 441
 442         serv_printf("%s", bstr("g_cmd"));
 443         serv_getln(buf, sizeof buf);
 444         wprintf("%s\n", buf);
 445
 446         if (buf[0] == '8') {
 447                 serv_printf("\n\n000");
 448         }
 449         if ((buf[0] == '1') || (buf[0] == '8')) {
 450                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 451                         wprintf("%s\n", gcontent);
 452                 }
 453                 wprintf("000");
 454         }
 455         if (buf[0] == '4') {
 456                 text_to_server(bstr("g_input"));
 457                 serv_puts("000");
 458         }
 459         if (buf[0] == '6') {
 460                 len = atol(&buf[4]);
 461                 junk = malloc(len);
 462                 serv_read(junk, len);
 463                 free(junk);
 464         }
 465         if (buf[0] == '7') {
 466                 len = atol(&buf[4]);
 467                 junk = malloc(len);
 468                 memset(junk, 0, len);
 469                 serv_write(junk, len);
 470                 free(junk);
 471         }
 472
 473         end_ajax_response();
 474
 475         /*
 476          * This is kind of an ugly hack, but this is the only place it can go.
 477          * If the command was GEXP, then the instant messenger window must be
 478          * running, so reset the "last_pager_check" watchdog timer so
 479          * that page_popup() doesn't try to open it a second time.
 480          */
 481         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 482                 WC->last_pager_check = time(NULL);
 483         }
 484 }
 485
 486
 487 /*
 488  * Helper function for the asynchronous check to see if we need
 489  * to open the instant messenger window.
 490  */
 491 void seconds_since_last_gexp(void)
 492 {
 493         char buf[256];
 494
 495         if ( (time(NULL) - WC->last_pager_check) < 30) {
 496                 wprintf("NO\n");
 497         }
 498         else {
 499                 memset(buf, 0, 5);
 500                 serv_puts("NOOP");
 501                 serv_getln(buf, sizeof buf);
 502                 if (buf[3] == '*') {
 503                         wprintf("YES");
 504                 }
 505                 else {
 506                         wprintf("NO");
 507                 }
 508         }
 509 }
 510
 511 /**
 512  * \brief Detects a 'mobile' user agent
 513  */
 514 int is_mobile_ua(char *user_agent) {
 515       if (strstr(user_agent,"iPhone OS") != NULL) {
 516         return 1;
 517       } else if (strstr(user_agent,"Windows CE") != NULL) {
 518         return 1;
 519       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 520         return 1;
 521       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 522         return 1;
 523       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 524               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 525           return 1;
 526           }
 527       return 0;
 528 }
 529
 530
 531 /*
 532  * Entry point for WebCit transaction
 533  */
 534 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
 535 {
 536         StrBuf *Buf;
 537         const char *pch, *pchs, *pche;
 538         void *vLine;
 539         char action[1024];
 540         char arg[8][128];
 541         size_t sizes[10];
 542         char *index[10];
 543         char buf[SIZ];
 544         int a, nBackDots, nEmpty;
 545         int ContentLength = 0;
 546         StrBuf *ContentType = NULL;
 547         StrBuf *UrlLine = NULL;
 548         StrBuf *content = NULL;
 549         const char *content_end = NULL;
 550         char browser_host[256];
 551         char user_agent[256];
 552         int body_start = 0;
 553         int is_static = 0;
 554         int n_static = 0;
 555         int len = 0;
 556         void *vHandler;
 557         WebcitHandler *Handler;
 558
 559         /*
 560          * We stuff these with the values coming from the client cookies,
 561          * so we can use them to reconnect a timed out session if we have to.
 562          */
 563         StrBuf *c_username;
 564         StrBuf *c_password;
 565         StrBuf *c_roomname;
 566         char c_httpauth_string[SIZ];
 567         StrBuf *c_httpauth_user;
 568         StrBuf *c_httpauth_pass;
 569         wcsession *WCC;
 570
 571         Buf = NewStrBuf();
 572         c_username = NewStrBuf();
 573         c_password = NewStrBuf();
 574         c_roomname = NewStrBuf();
 575         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 576         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 577         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 578         strcpy(browser_host, "");
 579
 580         WCC= WC;
 581         if (WCC->WBuf == NULL)
 582                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 583         FlushStrBuf(WCC->WBuf);
 584
 585         if (WCC->HBuf == NULL)
 586                 WCC->HBuf = NewStrBuf();
 587         FlushStrBuf(WCC->HBuf);
 588
 589         WCC->upload_length = 0;
 590         WCC->upload = NULL;
 591         WCC->is_mobile = 0;
 592         WCC->trailing_javascript = NewStrBuf();
 593
 594         /** Figure out the action */
 595         index[0] = action;
 596         sizes[0] = sizeof action;
 597         for (a=1; a<9; a++)
 598         {
 599                 index[a] = arg[a-1];
 600                 sizes[a] = sizeof arg[a-1];
 601         }
 602 /*///   index[9] = &foo; todo */
 603         nBackDots = 0;
 604         nEmpty = 0;
 605         for ( a = 0; a < 9; ++a)
 606         {
 607                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 608                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 609                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 610                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 611                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 612                         nBackDots++;
 613                 if (index[a][0] == '\0')
 614                         nEmpty++;
 615         }
 616
 617
 618         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 619             (vLine != NULL)){
 620                 cookie_to_stuff((StrBuf *)vLine, NULL,
 621                                 c_username,
 622                                 c_password,
 623                                 c_roomname);
 624         }
 625         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 626             (vLine!=NULL)) {
 627 /* TODO: wrap base64 in strbuf */
 628                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
 629                 FlushStrBuf(Buf);
 630                 StrBufAppendBufPlain(Buf, c_httpauth_string, -1, 0);
 631                 StrBufExtract_token(c_httpauth_user, Buf, 0, ':');
 632                 StrBufExtract_token(c_httpauth_pass, Buf, 1, ':');
 633         }
 634         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 635             (vLine!=NULL)) {
 636                 ContentLength = StrToi((StrBuf*)vLine);
 637         }
 638         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 639             (vLine!=NULL)) {
 640                 ContentType = (StrBuf*)vLine;
 641         }
 642         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 643             (vLine!=NULL)) {
 644                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 645 #ifdef TECH_PREVIEW
 646                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 647                         WCC->is_mobile = 1;
 648                 }
 649                 else {
 650                         WCC->is_mobile = 0;
 651                 }
 652 #endif
 653         }
 654         if ((follow_xff) &&
 655             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 656             (vLine != NULL)) {
 657                 safestrncpy(WCC->http_host,
 658                             ChrPtr((StrBuf*)vLine),
 659                             sizeof WCC->http_host);
 660         }
 661         if (IsEmptyStr(WCC->http_host) &&
 662             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 663             (vLine!=NULL)) {
 664                 safestrncpy(WCC->http_host,
 665                             ChrPtr((StrBuf*)vLine),
 666                             sizeof WCC->http_host);
 667
 668         }
 669         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 670             (vLine!=NULL)) {
 671                 safestrncpy(browser_host,
 672                             ChrPtr((StrBuf*) vLine),
 673                             sizeof browser_host);
 674                 while (num_tokens(browser_host, ',') > 1) {
 675                         remove_token(browser_host, 0, ',');
 676                 }
 677                 striplt(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         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
 708         remove_token(WCC->this_page, 2, ' ');
 709         remove_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 (!strcasecmp(ctdlhost, "uds")) {
 792                         /* unix domain socket */
 793                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 794                         WCC->serv_sock = uds_connectsock(buf);
 795                 }
 796                 else {
 797                         /* tcp socket */
 798                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 799                 }
 800
 801                 if (WCC->serv_sock < 0) {
 802                         do_logout();
 803                         goto SKIP_ALL_THIS_CRAP;
 804                 }
 805                 else {
 806                         WCC->connected = 1;
 807                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
 808
 809                         /**
 810                          * From what host is our user connecting?  Go with
 811                          * the host at the other end of the HTTP socket,
 812                          * unless we are following X-Forwarded-For: headers
 813                          * and such a header has already turned up something.
 814                          */
 815                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
 816                                 locate_host(browser_host, WCC->http_sock);
 817                         }
 818
 819                         get_serv_info(browser_host, user_agent);
 820                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 821                                 begin_burst();
 822                                 wprintf(_("You are connected to a Citadel "
 823                                         "server running Citadel %d.%02d. \n"
 824                                         "In order to run this version of WebCit "
 825                                         "you must also have Citadel %d.%02d or"
 826                                         " newer.\n\n\n"),
 827                                                 serv_info.serv_rev_level / 100,
 828                                                 serv_info.serv_rev_level % 100,
 829                                                 MINIMUM_CIT_VERSION / 100,
 830                                                 MINIMUM_CIT_VERSION % 100
 831                                         );
 832                                 end_burst();
 833                                 end_webcit_session();
 834                                 goto SKIP_ALL_THIS_CRAP;
 835                         }
 836                 }
 837         }
 838 /*///////todo: restore language in this case */
 839         /*
 840          * Functions which can be performed without logging in
 841          */
 842         if (!strcasecmp(action, "listsub")) {
 843                 do_listsub();
 844                 goto SKIP_ALL_THIS_CRAP;
 845         }
 846         if (!strcasecmp(action, "freebusy")) {
 847                 do_freebusy(ChrPtr(ReqLine));
 848                 goto SKIP_ALL_THIS_CRAP;
 849         }
 850
 851         /*
 852          * If we're not logged in, but we have HTTP Authentication data,
 853          * try logging in to Citadel using that.
 854          */
 855         if ((!WCC->logged_in)
 856             && (StrLength(c_httpauth_user) > 0)
 857             && (StrLength(c_httpauth_pass) > 0))
 858         {
 859                 FlushStrBuf(Buf);
 860                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 861                 StrBuf_ServGetln(Buf);
 862                 if (GetServerStatus(Buf, NULL) == 3) {
 863                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 864                         StrBuf_ServGetln(Buf);
 865                         if (GetServerStatus(Buf, NULL) == 2) {
 866                                 become_logged_in(c_httpauth_user,
 867                                                 c_httpauth_pass, Buf);
 868                                 if (WCC->httpauth_user == NULL)
 869                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 870                                 else {
 871                                         FlushStrBuf(WCC->httpauth_user);
 872                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 873                                 }
 874                                 if (WCC->httpauth_pass == NULL)
 875                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 876                                 else {
 877                                         FlushStrBuf(WCC->httpauth_pass);
 878                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 879                                 }
 880                         } else {
 881                                 /* Should only display when password is wrong */
 882                                 authorization_required(&buf[4]);
 883                                 FreeStrBuf(&Buf);
 884                                 goto SKIP_ALL_THIS_CRAP;
 885                         }
 886                 }
 887         }
 888
 889         /* This needs to run early */
 890 #ifdef TECH_PREVIEW
 891         if (!strcasecmp(action, "rss")) {
 892                 display_rss(sbstr("room"), request_method);
 893                 goto SKIP_ALL_THIS_CRAP;
 894         }
 895 #endif
 896
 897         /*
 898          * The GroupDAV stuff relies on HTTP authentication instead of
 899          * our session's authentication.
 900          */
 901         if (!strncasecmp(action, "groupdav", 8)) {
 902                 groupdav_main(HTTPHeaders,
 903                               ReqLine, request_method,
 904                               ContentType, /* do GroupDAV methods */
 905                               ContentLength, content, body_start);
 906                 if (!WCC->logged_in) {
 907                         WCC->killthis = 1;      /* If not logged in, don't */
 908                 }                               /* keep the session active */
 909                 goto SKIP_ALL_THIS_CRAP;
 910         }
 911
 912
 913         /*
 914          * Automatically send requests with any method other than GET or
 915          * POST to the GroupDAV code as well.
 916          */
 917         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 918                 groupdav_main(HTTPHeaders, ReqLine,
 919                               request_method, ContentType, /** do GroupDAV methods */
 920                               ContentLength, content, body_start);
 921                 if (!WCC->logged_in) {
 922                         WCC->killthis = 1;      /** If not logged in, don't */
 923                 }                               /** keep the session active */
 924                 goto SKIP_ALL_THIS_CRAP;
 925         }
 926
 927         /*
 928          * If we're not logged in, but we have username and password cookies
 929          * supplied by the browser, try using them to log in.
 930          */
 931         if ((!WCC->logged_in)
 932            && (StrLength(c_username)>0)
 933            && (StrLength(c_password)>0)) {
 934                 serv_printf("USER %s", ChrPtr(c_username));
 935                 StrBuf_ServGetln(Buf);
 936                 if (GetServerStatus(Buf, NULL) == 3) {
 937                         serv_printf("PASS %s", ChrPtr(c_password));
 938                         StrBuf_ServGetln(Buf);
 939                         if (GetServerStatus(Buf, NULL) == 2) {
 940                                 StrBuf *Lang;
 941                                 become_logged_in(c_username, c_password, Buf);
 942                                 if (get_preference("language", &Lang)) {
 943                                         set_selected_language(ChrPtr(Lang));
 944                                         go_selected_language();         /* set locale */
 945                                 }
 946                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 947                         }
 948                 }
 949         }
 950
 951         /*
 952          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 953          * prior to doing anything else.
 954          */
 955         if (havebstr("gotofirst")) {
 956                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 957         }
 958
 959         /*
 960          * If we don't have a current room, but a cookie specifying the
 961          * current room is supplied, make an effort to go there.
 962          */
 963         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 964                 serv_printf("GOTO %s", ChrPtr(c_roomname));
 965                 StrBuf_ServGetln(Buf);
 966                 if (GetServerStatus(Buf, NULL) == 2) {
 967                         if (WCC->wc_roomname == NULL) {
 968                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
 969                         }
 970                         else {
 971                                 FlushStrBuf(WCC->wc_roomname);
 972                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
 973                         }
 974                 }
 975         }
 976
 977         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 978                 Handler = (WebcitHandler*) vHandler;
 979         if (Handler != NULL) {
 980                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 981                         display_login(NULL);
 982                 }
 983                 else {
 984                         if((Handler->Flags & NEED_URL)) {
 985                                 if (WCC->UrlFragment1 == NULL)
 986                                         WCC->UrlFragment1 = NewStrBuf();
 987                                 if (WCC->UrlFragment2 == NULL)
 988                                         WCC->UrlFragment2 = NewStrBuf();
 989                                 if (WCC->UrlFragment3 == NULL)
 990                                         WCC->UrlFragment3 = NewStrBuf();
 991                                 StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
 992                                 StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
 993                                 StrBufPrintf(WCC->UrlFragment3, "%s", index[2]);
 994                         }
 995                         if ((Handler->Flags & AJAX) != 0)
 996                                 begin_ajax_response();
 997                         Handler->F();
 998                         if ((Handler->Flags & AJAX) != 0)
 999                                 end_ajax_response();
1000                 }
1001         }
1002         /* When all else fais, display the main menu. */
1003         else {
1004                 if (!WCC->logged_in)
1005                         display_login(NULL);
1006                 else
1007                         display_main_menu();
1008         }
1009
1010 SKIP_ALL_THIS_CRAP:
1011         if (WCC->SavePrefsToServer) {
1012                 save_preferences();
1013                 WCC->SavePrefsToServer = 0;
1014         }
1015         FreeStrBuf(&Buf);
1016         FreeStrBuf(&c_username);
1017         FreeStrBuf(&c_password);
1018         FreeStrBuf(&c_roomname);
1019         FreeStrBuf(&c_httpauth_user);
1020         FreeStrBuf(&c_httpauth_pass);
1021         fflush(stdout);
1022         if (content != NULL) {
1023                 FreeStrBuf(&content);
1024                 content = NULL;
1025         }
1026         DeleteHash(&WCC->urlstrings);
1027         if (WCC->upload_length > 0) {
1028                 free(WCC->upload);
1029                 WCC->upload_length = 0;
1030         }
1031         FreeStrBuf(&WCC->trailing_javascript);
1032 }
1033
1034
1035 /*
1036  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1037  */
1038 void sleeeeeeeeeep(int seconds)
1039 {
1040         struct timeval tv;
1041
1042         tv.tv_sec = seconds;
1043         tv.tv_usec = 0;
1044         select(0, NULL, NULL, NULL, &tv);
1045 }
1046
1047
1048 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1049 {
1050         wcsession *WCC = WC;
1051         if (WCC != NULL)
1052                 return (!IsEmptyStr(WCC->ImportantMessage));
1053         else
1054                 return 0;
1055 }
1056
1057 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1058 {
1059         wcsession *WCC = WC;
1060
1061         if (WCC != NULL) {
1062 /*
1063                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1064                                      WCC->ImportantMessage, 0);
1065 */
1066                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1067                 WCC->ImportantMessage[0] = '\0';
1068         }
1069 }
1070
1071 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1072 {
1073         wcsession *WCC = WC;
1074
1075         if (WCC != NULL)
1076                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1077 }
1078
1079 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1080 {
1081         extern StrBuf *csslocal;
1082         StrBufAppendBuf(Target,
1083                         csslocal, 0);
1084 }
1085
1086
1087
1088
1089 void
1090 InitModule_WEBCIT
1091 (void)
1092 {
1093         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1094         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1095         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1096         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1097
1098         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1099         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1100         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1101         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1102 }