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