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, serv_info.serv_software
 122                 );
 123         }
 124
 125         if (cache) {
 126                 char httpTomorow[128];
 127
 128                 http_datestring(httpTomorow, sizeof httpTomorow,
 129                                 time(NULL) + 60 * 60 * 24 * 2);
 130
 131                 hprintf("Pragma: public\r\n"
 132                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 133                         "Last-modified: %s\r\n"
 134                         "Expires: %s\r\n",
 135                         httpnow,
 136                         httpTomorow
 137                 );
 138         }
 139         else {
 140                 hprintf("Pragma: no-cache\r\n"
 141                         "Cache-Control: no-store\r\n"
 142                         "Expires: -1\r\n"
 143                 );
 144         }
 145
 146         stuff_to_cookie(cookie, 1024, WC->wc_session, WC->wc_username,
 147                         WC->wc_password, WC->wc_roomname);
 148
 149         if (unset_cookies) {
 150                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 151         } else {
 152                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 153                 if (server_cookie != NULL) {
 154                         hprintf("%s\n", server_cookie);
 155                 }
 156         }
 157
 158         if (do_htmlhead) {
 159                 begin_burst();
 160                 do_template("head", NULL);
 161         }
 162
 163         /* ICONBAR */
 164         if (do_htmlhead) {
 165                 begin_burst();
 166
 167                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 168                 if (!IsEmptyStr(WC->ImportantMessage)) {
 169                         wprintf("<div id=\"important_message\">\n"
 170                                 "<span class=\"imsg\">");
 171                         escputs(WC->ImportantMessage);
 172                         wprintf("</span><br />\n"
 173                                 "</div>\n"
 174                                 "<script type=\"text/javascript\">\n"
 175                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 176                                 "</script>\n");
 177                         WC->ImportantMessage[0] = 0;
 178                 }
 179
 180                 if ( (WC->logged_in) && (!unset_cookies) ) {
 181                         wprintf("<div id=\"iconbar\">");
 182                         do_selected_iconbar();
 183                         /** check for instant messages (these display in a new window) */
 184                         page_popup();
 185                         wprintf("</div>");
 186                 }
 187
 188                 if (do_room_banner == 1) {
 189                         wprintf("<div id=\"banner\">\n");
 190                         embed_room_banner(NULL, navbar_default);
 191                         wprintf("</div>\n");
 192                 }
 193         }
 194
 195         if (do_room_banner == 1) {
 196                 wprintf("<div id=\"content\">\n");
 197         }
 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(ChrPtr(Tmpl), StrLength(Tmpl), NULL, NULL, 0);
 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", 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, 5, 0);
 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         const char *pch, *pchs, *pche;
 537         void *vLine;
 538         char action[1024];
 539         char arg[8][128];
 540         size_t sizes[10];
 541         char *index[10];
 542         char buf[SIZ];
 543         int a, nBackDots, nEmpty;
 544         int ContentLength = 0;
 545         StrBuf *ContentType = NULL;
 546         StrBuf *UrlLine = NULL;
 547         StrBuf *content = NULL;
 548         const char *content_end = NULL;
 549         char browser_host[256];
 550         char user_agent[256];
 551         int body_start = 0;
 552         int is_static = 0;
 553         int n_static = 0;
 554         int len = 0;
 555         void *vHandler;
 556         WebcitHandler *Handler;
 557
 558         /*
 559          * We stuff these with the values coming from the client cookies,
 560          * so we can use them to reconnect a timed out session if we have to.
 561          */
 562         char c_username[SIZ];
 563         char c_password[SIZ];
 564         char c_roomname[SIZ];
 565         char c_httpauth_string[SIZ];
 566         char c_httpauth_user[SIZ];
 567         char c_httpauth_pass[SIZ];
 568         wcsession *WCC;
 569
 570         safestrncpy(c_username, "", sizeof c_username);
 571         safestrncpy(c_password, "", sizeof c_password);
 572         safestrncpy(c_roomname, "", sizeof c_roomname);
 573         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 574         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
 575         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
 576         strcpy(browser_host, "");
 577
 578         WCC= WC;
 579         if (WCC->WBuf == NULL)
 580                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 581         FlushStrBuf(WCC->WBuf);
 582
 583         if (WCC->HBuf == NULL)
 584                 WCC->HBuf = NewStrBuf();
 585         FlushStrBuf(WCC->HBuf);
 586
 587         WCC->upload_length = 0;
 588         WCC->upload = NULL;
 589         WCC->is_mobile = 0;
 590         WCC->trailing_javascript = NewStrBuf();
 591
 592         /** Figure out the action */
 593         index[0] = action;
 594         sizes[0] = sizeof action;
 595         for (a=1; a<9; a++)
 596         {
 597                 index[a] = arg[a-1];
 598                 sizes[a] = sizeof arg[a-1];
 599         }
 600 ////    index[9] = &foo; todo
 601         nBackDots = 0;
 602         nEmpty = 0;
 603         for ( a = 0; a < 9; ++a)
 604         {
 605                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 606                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 607                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 608                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 609                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 610                         nBackDots++;
 611                 if (index[a][0] == '\0')
 612                         nEmpty++;
 613         }
 614
 615
 616         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 617             (vLine != NULL)){
 618                 cookie_to_stuff((StrBuf *)vLine, NULL,
 619                                 c_username, sizeof c_username,
 620                                 c_password, sizeof c_password,
 621                                 c_roomname, sizeof c_roomname);
 622         }
 623         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 624             (vLine!=NULL)) {
 625                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
 626                 extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
 627                 extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
 628         }
 629         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 630             (vLine!=NULL)) {
 631                 ContentLength = StrToi((StrBuf*)vLine);
 632         }
 633         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 634             (vLine!=NULL)) {
 635                 ContentType = (StrBuf*)vLine;
 636         }
 637         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 638             (vLine!=NULL)) {
 639                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 640 #ifdef TECH_PREVIEW
 641                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 642                         WCC->is_mobile = 1;
 643                 }
 644                 else {
 645                         WCC->is_mobile = 0;
 646                 }
 647 #endif
 648         }
 649         if ((follow_xff) &&
 650             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 651             (vLine != NULL)) {
 652                 safestrncpy(WCC->http_host,
 653                             ChrPtr((StrBuf*)vLine),
 654                             sizeof WCC->http_host);
 655         }
 656         if (IsEmptyStr(WCC->http_host) &&
 657             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 658             (vLine!=NULL)) {
 659                 safestrncpy(WCC->http_host,
 660                             ChrPtr((StrBuf*)vLine),
 661                             sizeof WCC->http_host);
 662
 663         }
 664         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 665             (vLine!=NULL)) {
 666                 safestrncpy(browser_host,
 667                             ChrPtr((StrBuf*) vLine),
 668                             sizeof browser_host);
 669                 while (num_tokens(browser_host, ',') > 1) {
 670                         remove_token(browser_host, 0, ',');
 671                 }
 672                 striplt(browser_host);
 673         }
 674
 675         if (ContentLength > 0) {
 676                 content = NewStrBuf();
 677                 StrBufPrintf(content, "Content-type: %s\n"
 678                          "Content-length: %d\n\n",
 679                          ChrPtr(ContentType), ContentLength);
 680 /*
 681                 hprintf("Content-type: %s\n"
 682                         "Content-length: %d\n\n",
 683                         ContentType, ContentLength);
 684 */
 685                 body_start = StrLength(content);
 686
 687                 /** Read the entire input data at once. */
 688                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
 689
 690                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 691                         StrBufCutLeft(content, body_start);
 692                         ParseURLParams(content);
 693                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 694                         content_end = ChrPtr(content) + ContentLength + body_start;
 695                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 696                 }
 697         } else {
 698                 content = NULL;
 699         }
 700
 701         /* make a note of where we are in case the user wants to save it */
 702         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
 703         remove_token(WCC->this_page, 2, ' ');
 704         remove_token(WCC->this_page, 0, ' ');
 705
 706         /* If there are variables in the URL, we must grab them now */
 707         UrlLine = NewStrBufDup(ReqLine);
 708         len = StrLength(UrlLine);
 709         pch = pchs = ChrPtr(UrlLine);
 710         pche = pchs + len;
 711         while (pch < pche) {
 712                 if ((*pch == '?') || (*pch == '&')) {
 713                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 714                         ParseURLParams(UrlLine);
 715                         break;
 716                 }
 717                 pch ++;
 718         }
 719         FreeStrBuf(&UrlLine);
 720
 721         /* If it's a "force 404" situation then display the error and bail. */
 722         if (!strcmp(action, "404")) {
 723                 hprintf("HTTP/1.1 404 Not found\r\n");
 724                 hprintf("Content-Type: text/plain\r\n");
 725                 wprintf("Not found\r\n");
 726                 end_burst();
 727                 goto SKIP_ALL_THIS_CRAP;
 728         }
 729
 730         /* Static content can be sent without connecting to Citadel. */
 731         is_static = 0;
 732         for (a=0; a<ndirs && ! is_static; ++a) {
 733                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 734                         is_static = 1;
 735                         n_static = a;
 736                 }
 737         }
 738         if (is_static) {
 739                 if (nBackDots < 2)
 740                 {
 741                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 742                                  static_dirs[n_static],
 743                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 744                         for (a=0; a<8; ++a) {
 745                                 if (buf[strlen(buf)-1] == '/') {
 746                                         buf[strlen(buf)-1] = 0;
 747                                 }
 748                         }
 749                         for (a = 0; a < strlen(buf); ++a) {
 750                                 if (isspace(buf[a])) {
 751                                         buf[a] = 0;
 752                                 }
 753                         }
 754                         output_static(buf);
 755                 }
 756                 else
 757                 {
 758                         lprintf(9, "Suspicious request. Ignoring.");
 759                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 760                         hprintf("Content-Type: text/plain\r\n");
 761                         wprintf("You have sent a malformed or invalid request.\r\n");
 762                         end_burst();
 763                 }
 764                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 765         }
 766
 767         /* If the client sent a nonce that is incorrect, kill the request. */
 768         if (strlen(bstr("nonce")) > 0) {
 769                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 770                         bstr("nonce"), WCC->nonce);
 771                 if (ibstr("nonce") != WCC->nonce) {
 772                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 773                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 774                         hprintf("Content-Type: text/plain\r\n");
 775                         wprintf("Security check failed.\r\n");
 776                         end_burst();
 777                         goto SKIP_ALL_THIS_CRAP;
 778                 }
 779         }
 780
 781         /*
 782          * If we're not connected to a Citadel server, try to hook up the
 783          * connection now.
 784          */
 785         if (!WCC->connected) {
 786                 if (!strcasecmp(ctdlhost, "uds")) {
 787                         /* unix domain socket */
 788                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 789                         WCC->serv_sock = uds_connectsock(buf);
 790                 }
 791                 else {
 792                         /* tcp socket */
 793                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 794                 }
 795
 796                 if (WCC->serv_sock < 0) {
 797                         do_logout();
 798                         goto SKIP_ALL_THIS_CRAP;
 799                 }
 800                 else {
 801                         WCC->connected = 1;
 802                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
 803
 804                         /**
 805                          * From what host is our user connecting?  Go with
 806                          * the host at the other end of the HTTP socket,
 807                          * unless we are following X-Forwarded-For: headers
 808                          * and such a header has already turned up something.
 809                          */
 810                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
 811                                 locate_host(browser_host, WCC->http_sock);
 812                         }
 813
 814                         get_serv_info(browser_host, user_agent);
 815                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 816                                 begin_burst();
 817                                 wprintf(_("You are connected to a Citadel "
 818                                         "server running Citadel %d.%02d. \n"
 819                                         "In order to run this version of WebCit "
 820                                         "you must also have Citadel %d.%02d or"
 821                                         " newer.\n\n\n"),
 822                                                 serv_info.serv_rev_level / 100,
 823                                                 serv_info.serv_rev_level % 100,
 824                                                 MINIMUM_CIT_VERSION / 100,
 825                                                 MINIMUM_CIT_VERSION % 100
 826                                         );
 827                                 end_burst();
 828                                 end_webcit_session();
 829                                 goto SKIP_ALL_THIS_CRAP;
 830                         }
 831                 }
 832         }
 833 ////////todo: restore language in this case
 834         /*
 835          * Functions which can be performed without logging in
 836          */
 837         if (!strcasecmp(action, "listsub")) {
 838                 do_listsub();
 839                 goto SKIP_ALL_THIS_CRAP;
 840         }
 841         if (!strcasecmp(action, "freebusy")) {
 842                 do_freebusy(ChrPtr(ReqLine));
 843                 goto SKIP_ALL_THIS_CRAP;
 844         }
 845
 846         /*
 847          * If we're not logged in, but we have HTTP Authentication data,
 848          * try logging in to Citadel using that.
 849          */
 850         if ((!WCC->logged_in)
 851            && (strlen(c_httpauth_user) > 0)
 852            && (strlen(c_httpauth_pass) > 0)) {
 853                 serv_printf("USER %s", c_httpauth_user);
 854                 serv_getln(buf, sizeof buf);
 855                 if (buf[0] == '3') {
 856                         serv_printf("PASS %s", c_httpauth_pass);
 857                         serv_getln(buf, sizeof buf);
 858                         if (buf[0] == '2') {
 859                                 become_logged_in(c_httpauth_user,
 860                                                 c_httpauth_pass, buf);
 861                                 safestrncpy(WCC->httpauth_user, c_httpauth_user, sizeof WCC->httpauth_user);
 862                                 safestrncpy(WCC->httpauth_pass, c_httpauth_pass, sizeof WCC->httpauth_pass);
 863                         } else {
 864                                 /* Should only display when password is wrong */
 865                                 authorization_required(&buf[4]);
 866                                 goto SKIP_ALL_THIS_CRAP;
 867                         }
 868                 }
 869         }
 870
 871         /* This needs to run early */
 872 #ifdef TECH_PREVIEW
 873         if (!strcasecmp(action, "rss")) {
 874                 display_rss(bstr("room"), request_method);
 875                 goto SKIP_ALL_THIS_CRAP;
 876         }
 877 #endif
 878
 879         /*
 880          * The GroupDAV stuff relies on HTTP authentication instead of
 881          * our session's authentication.
 882          */
 883         if (!strncasecmp(action, "groupdav", 8)) {
 884                 groupdav_main(HTTPHeaders,
 885                               ReqLine, request_method,
 886                               ContentType, /* do GroupDAV methods */
 887                               ContentLength, content, body_start);
 888                 if (!WCC->logged_in) {
 889                         WCC->killthis = 1;      /* If not logged in, don't */
 890                 }                               /* keep the session active */
 891                 goto SKIP_ALL_THIS_CRAP;
 892         }
 893
 894
 895         /*
 896          * Automatically send requests with any method other than GET or
 897          * POST to the GroupDAV code as well.
 898          */
 899         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 900                 groupdav_main(HTTPHeaders, ReqLine,
 901                               request_method, 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          * If we're not logged in, but we have username and password cookies
 911          * supplied by the browser, try using them to log in.
 912          */
 913         if ((!WCC->logged_in)
 914            && (!IsEmptyStr(c_username))
 915            && (!IsEmptyStr(c_password))) {
 916                 serv_printf("USER %s", c_username);
 917                 serv_getln(buf, sizeof buf);
 918                 if (buf[0] == '3') {
 919                         serv_printf("PASS %s", c_password);
 920                         serv_getln(buf, sizeof buf);
 921                         if (buf[0] == '2') {
 922                                 StrBuf *Lang;
 923                                 become_logged_in(c_username, c_password, buf);
 924                                 if (get_preference("language", &Lang)) {
 925                                         set_selected_language(ChrPtr(Lang));
 926                                         go_selected_language();         /* set locale */
 927                                 }
 928                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 929                         }
 930                 }
 931         }
 932         /*
 933          * If we don't have a current room, but a cookie specifying the
 934          * current room is supplied, make an effort to go there.
 935          */
 936         if ((IsEmptyStr(WCC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
 937                 serv_printf("GOTO %s", c_roomname);
 938                 serv_getln(buf, sizeof buf);
 939                 if (buf[0] == '2') {
 940                         safestrncpy(WCC->wc_roomname, c_roomname, sizeof WCC->wc_roomname);
 941                 }
 942         }
 943
 944         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 945                 Handler = (WebcitHandler*) vHandler;
 946         if (Handler != NULL) {
 947                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 948                         display_login(NULL);
 949                 }
 950                 else {
 951                         if((Handler->Flags & NEED_URL)) {
 952                                 if (WCC->UrlFragment1 == NULL)
 953                                         WCC->UrlFragment1 = NewStrBuf();
 954                                 if (WCC->UrlFragment2 == NULL)
 955                                         WCC->UrlFragment2 = NewStrBuf();
 956                                 if (WCC->UrlFragment3 == NULL)
 957                                         WCC->UrlFragment3 = NewStrBuf();
 958                                 StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
 959                                 StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
 960                                 StrBufPrintf(WCC->UrlFragment3, "%s", index[2]);
 961                         }
 962                         if ((Handler->Flags & AJAX) != 0)
 963                                 begin_ajax_response();
 964                         Handler->F();
 965                         if ((Handler->Flags & AJAX) != 0)
 966                                 end_ajax_response();
 967                 }
 968         }
 969         /* When all else fais, display the main menu. */
 970         else {
 971                 if (!WCC->logged_in)
 972                         display_login(NULL);
 973                 else
 974                         display_main_menu();
 975         }
 976
 977 SKIP_ALL_THIS_CRAP:
 978         fflush(stdout);
 979         if (content != NULL) {
 980                 FreeStrBuf(&content);
 981                 content = NULL;
 982         }
 983         DeleteHash(&WCC->urlstrings);
 984         if (WCC->upload_length > 0) {
 985                 free(WCC->upload);
 986                 WCC->upload_length = 0;
 987         }
 988         FreeStrBuf(&WCC->trailing_javascript);
 989 }
 990
 991
 992 /*
 993  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 994  */
 995 void sleeeeeeeeeep(int seconds)
 996 {
 997         struct timeval tv;
 998
 999         tv.tv_sec = seconds;
1000         tv.tv_usec = 0;
1001         select(0, NULL, NULL, NULL, &tv);
1002 }
1003
1004 void diagnostics(void)
1005 {
1006         output_headers(1, 1, 1, 0, 0, 0);
1007         wprintf("Session: %d<hr />\n", WC->wc_session);
1008         wprintf("Command: <br /><PRE>\n");
1009         StrEscPuts(WC->UrlFragment1);
1010         wprintf("<br />\n");
1011         StrEscPuts(WC->UrlFragment2);
1012         wprintf("<br />\n");
1013         StrEscPuts(WC->UrlFragment3);
1014         wprintf("</PRE><hr />\n");
1015         wprintf("Variables: <br /><PRE>\n");
1016         dump_vars();
1017         wprintf("</PRE><hr />\n");
1018         wDumpContent(1);
1019 }
1020
1021
1022 int ConditionalImportantMesage(WCTemplateToken *Tokens, void *Context, int ContextType)
1023 {
1024         wcsession *WCC = WC;
1025         if (WCC != NULL)
1026                 return (!IsEmptyStr(WCC->ImportantMessage));
1027         else
1028                 return 0;
1029 }
1030
1031 void tmplput_importantmessage(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1032 {
1033         wcsession *WCC = WC;
1034
1035         if (WCC != NULL) {
1036 /*
1037                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1038                                      WCC->ImportantMessage, 0);
1039 */
1040                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1041                 WCC->ImportantMessage[0] = '\0';
1042         }
1043 }
1044
1045 int ConditionalBstr(WCTemplateToken *Tokens, void *Context, int ContextType)
1046 {
1047         if(Tokens->nParameters == 3)
1048                 return HaveBstr(Tokens->Params[2]->Start,
1049                                 Tokens->Params[2]->len);
1050         else
1051                 return strcmp(Bstr(Tokens->Params[2]->Start,
1052                                    Tokens->Params[2]->len),
1053                               Tokens->Params[3]->Start) == 0;
1054 }
1055
1056 void tmplput_bstr(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1057 {
1058         const StrBuf *Buf = SBstr(Tokens->Params[0]->Start,
1059                             Tokens->Params[0]->len);
1060         if (Buf != NULL)
1061                 StrBufAppendTemplate(Target, nArgs, Tokens,
1062                                      Context, ContextType,
1063                                      Buf, 1);
1064 }
1065
1066 void tmplput_trailing_javascript(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *vContext, int ContextType)
1067 {
1068         wcsession *WCC = WC;
1069
1070         if (WCC != NULL)
1071                 StrBufAppendTemplate(Target, nArgs, Tokens, vContext, ContextType,
1072                                      WCC->trailing_javascript, 0);
1073 }
1074
1075 void tmplput_csslocal(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1076 {
1077         extern StrBuf *csslocal;
1078         StrBufAppendBuf(Target,
1079                         csslocal, 0);
1080 }
1081
1082 void tmplput_url_part(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1083 {
1084         StrBuf *UrlBuf;
1085         wcsession *WCC = WC;
1086
1087         if (WCC != NULL) {
1088                 if (Tokens->Params[0]->lvalue == 0)
1089                         UrlBuf = WCC->UrlFragment1;
1090                 else if (Tokens->Params[0]->lvalue == 1)
1091                         UrlBuf = WCC->UrlFragment2;
1092                 else
1093                         UrlBuf = WCC->UrlFragment3;
1094
1095                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1096                                      UrlBuf, 1);
1097         }
1098 }
1099
1100
1101
1102
1103 void
1104 InitModule_WEBCIT
1105 (void)
1106 {
1107         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1108         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1109         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1110         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1111         WebcitAddUrlHandler(HKEY("diagnostics"), diagnostics, NEED_URL);
1112
1113         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1114         RegisterConditional(HKEY("COND:BSTR"), 1, ConditionalBstr, CTX_NONE);
1115         RegisterNamespace("BSTR", 1, 2, tmplput_bstr, CTX_NONE);
1116         RegisterNamespace("URLPART", 1, 2, tmplput_url_part, CTX_NONE);
1117         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1118         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1119         RegisterNamespace("OFFERSTARTPAGE", 0, 0, offer_start_page, CTX_NONE);
1120         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1121 }