webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22
  23 HashList *HandlerHash = NULL;
  24
  25 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31
  32         if (HandlerHash == NULL)
  33                 HandlerHash = NewHash(1, NULL);
  34
  35         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  36         NewHandler->F = F;
  37         NewHandler->Flags = Flags;
  38         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  39 }
  40
  41
  42 /*
  43  * web-printing funcion. uses our vsnprintf wrapper
  44  */
  45 void wprintf(const char *format,...)
  46 {
  47         wcsession *WCC = WC;
  48         va_list arg_ptr;
  49
  50         if (WCC->WBuf == NULL)
  51                 WCC->WBuf = NewStrBuf();
  52
  53         va_start(arg_ptr, format);
  54         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  55         va_end(arg_ptr);
  56 }
  57
  58 /*
  59  * http-header-printing funcion. uses our vsnprintf wrapper
  60  */
  61 void hprintf(const char *format,...)
  62 {
  63         wcsession *WCC = WC;
  64         va_list arg_ptr;
  65
  66         va_start(arg_ptr, format);
  67         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  68         va_end(arg_ptr);
  69 }
  70
  71
  72
  73 /*
  74  * wrap up an HTTP session, closes tags, etc.
  75  *
  76  * print_standard_html_footer should be set to:
  77  * 0            - to transmit only,
  78  * nonzero      - to append the closing tags
  79  */
  80 void wDumpContent(int print_standard_html_footer)
  81 {
  82         if (print_standard_html_footer) {
  83                 wprintf("</div> <!-- end of 'content' div -->\n");
  84                 do_template("trailing", NULL);
  85         }
  86
  87         /* If we've been saving it all up for one big output burst,
  88          * go ahead and do that now.
  89          */
  90         end_burst();
  91 }
  92
  93
  94
  95
  96 /*
  97  * Output HTTP headers and leading HTML for a page
  98  */
  99 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 100                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 101
 102                         int do_room_banner,     /* 0=no, 1=yes,
 103                                                  * 2 = I'm going to embed my own, so don't open the
 104                                                  *     <div id="content"> either.
 105                                                  */
 106
 107                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 108                         int suppress_check,     /* 1 = suppress check for instant messages          */
 109                         int cache               /* 1 = allow browser to cache this page             */
 110 ) {
 111         wcsession *WCC = WC;
 112         char cookie[1024];
 113         char httpnow[128];
 114
 115         hprintf("HTTP/1.1 200 OK\n");
 116         http_datestring(httpnow, sizeof httpnow, time(NULL));
 117
 118         if (do_httpheaders) {
 119                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 120                         "Server: %s / %s\n"
 121                         "Connection: close\r\n",
 122                         PACKAGE_STRING,
 123                         ChrPtr(WCC->serv_info->serv_software)
 124                 );
 125         }
 126
 127         if (cache) {
 128                 char httpTomorow[128];
 129
 130                 http_datestring(httpTomorow, sizeof httpTomorow,
 131                                 time(NULL) + 60 * 60 * 24 * 2);
 132
 133                 hprintf("Pragma: public\r\n"
 134                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 135                         "Last-modified: %s\r\n"
 136                         "Expires: %s\r\n",
 137                         httpnow,
 138                         httpTomorow
 139                 );
 140         }
 141         else {
 142                 hprintf("Pragma: no-cache\r\n"
 143                         "Cache-Control: no-store\r\n"
 144                         "Expires: -1\r\n"
 145                 );
 146         }
 147
 148         stuff_to_cookie(cookie, 1024,
 149                         WCC->wc_session, WCC->wc_username,
 150                         WCC->wc_password, WCC->wc_roomname);
 151
 152         if (unset_cookies) {
 153                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 154         } else {
 155                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 156                 if (server_cookie != NULL) {
 157                         hprintf("%s\n", server_cookie);
 158                 }
 159         }
 160
 161         if (do_htmlhead) {
 162                 begin_burst();
 163                 do_template("head", NULL);
 164
 165                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 166                 if (!IsEmptyStr(WC->ImportantMessage)) {
 167                         wprintf("<div id=\"important_message\">\n"
 168                                 "<span class=\"imsg\">");
 169                         escputs(WC->ImportantMessage);
 170                         wprintf("</span><br />\n"
 171                                 "</div>\n"
 172                         );
 173                         StrBufAppendPrintf(WCC->trailing_javascript,
 174                                 "setTimeout('hide_imsg_popup()', 5000); \n"
 175                         );
 176                         WCC->ImportantMessage[0] = 0;
 177                 }
 178
 179                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 180                   //DoTemplate(HKEY("iconbar"), NULL, &NoCtx);
 181                         page_popup();
 182                 }
 183
 184                 if (do_room_banner == 1) {
 185                         wprintf("<div id=\"banner\">\n");
 186                         embed_room_banner(NULL, navbar_default);
 187                         wprintf("</div>\n");
 188                 }
 189         }
 190
 191         if (do_room_banner == 1) {
 192                 wprintf("<div id=\"content\">\n");
 193         }
 194 }
 195
 196 void output_custom_content_header(const char *ctype) {
 197   hprintf("HTTP/1.1 200 OK\r\n");
 198   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 199   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 200   hprintf("Connection: close\r\n");
 201 }
 202
 203
 204 /*
 205  * Generic function to do an HTTP redirect.  Easy and fun.
 206  */
 207 void http_redirect(const char *whichpage) {
 208         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 209         hprintf("Location: %s\r\n", whichpage);
 210         hprintf("URI: %s\r\n", whichpage);
 211         hprintf("Content-type: text/html; charset=utf-8\r\n");
 212         wprintf("<html><body>");
 213         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 214         wprintf("</body></html>\n");
 215         end_burst();
 216 }
 217
 218
 219
 220 /*
 221  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 222  */
 223 void http_transmit_thing(const char *content_type,
 224                          int is_static) {
 225
 226 #ifndef TECH_PREVIEW
 227         lprintf(9, "http_transmit_thing(%s)%s\n",
 228                 content_type,
 229                 (is_static ? " (static)" : "")
 230         );
 231 #endif
 232         output_headers(0, 0, 0, 0, 0, is_static);
 233
 234         hprintf("Content-type: %s\r\n"
 235                 "Server: %s\r\n"
 236                 "Connection: close\r\n",
 237                 content_type,
 238                 PACKAGE_STRING);
 239
 240         end_burst();
 241 }
 242
 243 /*
 244  * print menu box like used in the floor view or admin interface.
 245  * This function takes pair of strings as va_args,
 246  * Title        Title string of the box
 247  * Class        CSS Class for the box
 248  * nLines       How many string pairs should we print? (URL, UrlText)
 249  * ...          Pairs of URL Strings and their Names
 250  */
 251 void print_menu_box(char* Title, char *Class, int nLines, ...)
 252 {
 253         va_list arg_list;
 254         long i;
 255
 256         svput("BOXTITLE", WCS_STRING, Title);
 257         do_template("beginboxx", NULL);
 258
 259         wprintf("<ul class=\"%s\">", Class);
 260
 261         va_start(arg_list, nLines);
 262         for (i = 0; i < nLines; ++i)
 263         {
 264                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 265                 wprintf((char *) va_arg(arg_list, char *));
 266                 wprintf("</a></li>\n");
 267         }
 268         va_end (arg_list);
 269
 270         wprintf("</a></li>\n");
 271
 272         wprintf("</ul>");
 273
 274         do_template("endbox", NULL);
 275 }
 276
 277
 278 /*
 279  * dump out static pages from disk
 280  */
 281 void output_static(char *what)
 282 {
 283         int fd;
 284         struct stat statbuf;
 285         off_t bytes;
 286         off_t count = 0;
 287         const char *content_type;
 288         int len;
 289         const char *Err;
 290
 291         fd = open(what, O_RDONLY);
 292         if (fd <= 0) {
 293                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 294                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 295                 hprintf("Content-Type: text/plain\r\n");
 296                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 297                 end_burst();
 298         } else {
 299                 len = strlen (what);
 300                 content_type = GuessMimeByFilename(what, len);
 301
 302                 if (fstat(fd, &statbuf) == -1) {
 303                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 304                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 305                         hprintf("Content-Type: text/plain\r\n");
 306                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 307                         end_burst();
 308                         return;
 309                 }
 310
 311                 count = 0;
 312                 bytes = statbuf.st_size;
 313
 314                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 315                 {
 316                         if (fd > 0) close(fd);
 317                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 318                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 319                                 hprintf("Content-Type: text/plain\r\n");
 320                                 end_burst();
 321                                 return;
 322                 }
 323
 324
 325                 close(fd);
 326 #ifndef TECH_PREVIEW
 327                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 328 #endif
 329                 http_transmit_thing(content_type, 1);
 330         }
 331         if (yesbstr("force_close_session")) {
 332                 end_webcit_session();
 333         }
 334 }
 335
 336
 337 /*
 338  * Convenience functions to display a page containing only a string
 339  *
 340  * titlebarcolor        color of the titlebar of the frame
 341  * titlebarmsg          text to display in the title bar
 342  * messagetext          body of the box
 343  */
 344 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 345 {
 346         hprintf("HTTP/1.1 200 OK\n");
 347         output_headers(1, 1, 2, 0, 0, 0);
 348         wprintf("<div id=\"banner\">\n");
 349         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 350         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 351         wprintf("</td></tr></table>\n");
 352         wprintf("</div>\n<div id=\"content\">\n");
 353         escputs(messagetext);
 354
 355         wprintf("<hr />\n");
 356         wDumpContent(1);
 357 }
 358
 359
 360 /*
 361  * Display a blank page.
 362  */
 363 void blank_page(void) {
 364         output_headers(1, 1, 0, 0, 0, 0);
 365         wDumpContent(2);
 366 }
 367
 368
 369 /*
 370  * A template has been requested
 371  */
 372 void url_do_template(void) {
 373         const StrBuf *MimeType;
 374         const StrBuf *Tmpl = sbstr("template");
 375         begin_burst();
 376         output_headers(0, 0, 0, 0, 1, 0);
 377         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 378         http_transmit_thing(ChrPtr(MimeType), 0);
 379 }
 380
 381
 382
 383 /*
 384  * convenience function to indicate success
 385  */
 386 void display_success(char *successmessage)
 387 {
 388         convenience_page("007700", "OK", successmessage);
 389 }
 390
 391
 392 /*
 393  * Authorization required page
 394  * This is probably temporary and should be revisited
 395  */
 396 void authorization_required(const char *message)
 397 {
 398         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 399         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 400         hprintf("Content-Type: text/html\r\n");
 401         wprintf("<h1>");
 402         wprintf(_("Authorization Required"));
 403         wprintf("</h1>\r\n");
 404         wprintf(_("The resource you requested requires a valid username and password. "
 405                 "You could not be logged in: %s\n"), message);
 406         wDumpContent(0);
 407
 408 }
 409
 410 /*
 411  * Convenience functions to wrap around asynchronous ajax responses
 412  */
 413 void begin_ajax_response(void) {
 414         wcsession *WCC = WC;
 415
 416         FlushStrBuf(WCC->HBuf);
 417         output_headers(0, 0, 0, 0, 0, 0);
 418
 419         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 420                 "Server: %s\r\n"
 421                 "Connection: close\r\n"
 422                 ,
 423                 PACKAGE_STRING);
 424         begin_burst();
 425 }
 426
 427 /*
 428  * print ajax response footer
 429  */
 430 void end_ajax_response(void) {
 431         wDumpContent(0);
 432 }
 433
 434 /*
 435  * Wraps a Citadel server command in an AJAX transaction.
 436  */
 437 void ajax_servcmd(void)
 438 {
 439         char buf[1024];
 440         char gcontent[1024];
 441         char *junk;
 442         size_t len;
 443
 444         begin_ajax_response();
 445
 446         serv_printf("%s", bstr("g_cmd"));
 447         serv_getln(buf, sizeof buf);
 448         wprintf("%s\n", buf);
 449
 450         if (buf[0] == '8') {
 451                 serv_printf("\n\n000");
 452         }
 453         if ((buf[0] == '1') || (buf[0] == '8')) {
 454                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 455                         wprintf("%s\n", gcontent);
 456                 }
 457                 wprintf("000");
 458         }
 459         if (buf[0] == '4') {
 460                 text_to_server(bstr("g_input"));
 461                 serv_puts("000");
 462         }
 463         if (buf[0] == '6') {
 464                 len = atol(&buf[4]);
 465                 junk = malloc(len);
 466                 serv_read(junk, len);
 467                 free(junk);
 468         }
 469         if (buf[0] == '7') {
 470                 len = atol(&buf[4]);
 471                 junk = malloc(len);
 472                 memset(junk, 0, len);
 473                 serv_write(junk, len);
 474                 free(junk);
 475         }
 476
 477         end_ajax_response();
 478
 479         /*
 480          * This is kind of an ugly hack, but this is the only place it can go.
 481          * If the command was GEXP, then the instant messenger window must be
 482          * running, so reset the "last_pager_check" watchdog timer so
 483          * that page_popup() doesn't try to open it a second time.
 484          */
 485         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 486                 WC->last_pager_check = time(NULL);
 487         }
 488 }
 489
 490
 491 /*
 492  * Helper function for the asynchronous check to see if we need
 493  * to open the instant messenger window.
 494  */
 495 void seconds_since_last_gexp(void)
 496 {
 497         char buf[256];
 498
 499         if ( (time(NULL) - WC->last_pager_check) < 30) {
 500                 wprintf("NO\n");
 501         }
 502         else {
 503                 memset(buf, 0, 5);
 504                 serv_puts("NOOP");
 505                 serv_getln(buf, sizeof buf);
 506                 if (buf[3] == '*') {
 507                         wprintf("YES");
 508                 }
 509                 else {
 510                         wprintf("NO");
 511                 }
 512         }
 513 }
 514
 515 /**
 516  * \brief Detects a 'mobile' user agent
 517  */
 518 int is_mobile_ua(char *user_agent) {
 519       if (strstr(user_agent,"iPhone OS") != NULL) {
 520         return 1;
 521       } else if (strstr(user_agent,"Windows CE") != NULL) {
 522         return 1;
 523       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 524         return 1;
 525       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 526         return 1;
 527       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 528               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 529           return 1;
 530           }
 531       return 0;
 532 }
 533
 534
 535 /*
 536  * Entry point for WebCit transaction
 537  */
 538 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
 539 {
 540         StrBuf *Buf;
 541         const char *pch, *pchs, *pche;
 542         void *vLine;
 543         char action[1024];
 544         char arg[8][128];
 545         size_t sizes[10];
 546         char *index[10];
 547         char buf[SIZ];
 548         int a, nBackDots, nEmpty;
 549         int ContentLength = 0;
 550         StrBuf *ContentType = NULL;
 551         StrBuf *UrlLine = NULL;
 552         StrBuf *content = NULL;
 553         const char *content_end = NULL;
 554         StrBuf *browser_host = NULL;
 555         char user_agent[256];
 556         int body_start = 0;
 557         int is_static = 0;
 558         int n_static = 0;
 559         int len = 0;
 560         void *vHandler;
 561         WebcitHandler *Handler;
 562
 563         /*
 564          * We stuff these with the values coming from the client cookies,
 565          * so we can use them to reconnect a timed out session if we have to.
 566          */
 567         StrBuf *c_username;
 568         StrBuf *c_password;
 569         StrBuf *c_roomname;
 570         char c_httpauth_string[SIZ];
 571         StrBuf *c_httpauth_user;
 572         StrBuf *c_httpauth_pass;
 573         wcsession *WCC;
 574
 575         Buf = NewStrBuf();
 576         c_username = NewStrBuf();
 577         c_password = NewStrBuf();
 578         c_roomname = NewStrBuf();
 579         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 580         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 581         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 582
 583         WCC= WC;
 584         if (WCC->WBuf == NULL)
 585                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 586         FlushStrBuf(WCC->WBuf);
 587
 588         if (WCC->HBuf == NULL)
 589                 WCC->HBuf = NewStrBuf();
 590         FlushStrBuf(WCC->HBuf);
 591
 592         WCC->upload_length = 0;
 593         WCC->upload = NULL;
 594         WCC->is_mobile = 0;
 595         WCC->trailing_javascript = NewStrBuf();
 596         WCC->nWildfireHeaders = 0;
 597
 598         /** Figure out the action */
 599         index[0] = action;
 600         sizes[0] = sizeof action;
 601         for (a=1; a<9; a++)
 602         {
 603                 index[a] = arg[a-1];
 604                 sizes[a] = sizeof arg[a-1];
 605         }
 606 /*///   index[9] = &foo; todo */
 607         nBackDots = 0;
 608         nEmpty = 0;
 609         for ( a = 0; a < 9; ++a)
 610         {
 611                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 612                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 613                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 614                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 615                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 616                         nBackDots++;
 617                 if (index[a][0] == '\0')
 618                         nEmpty++;
 619         }
 620
 621
 622         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 623             (vLine != NULL)){
 624                 cookie_to_stuff((StrBuf *)vLine, NULL,
 625                                 c_username,
 626                                 c_password,
 627                                 c_roomname);
 628         }
 629         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 630             (vLine!=NULL)) {
 631 /* TODO: wrap base64 in strbuf */
 632                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
 633                 FlushStrBuf(Buf);
 634                 StrBufAppendBufPlain(Buf, c_httpauth_string, -1, 0);
 635                 StrBufExtract_token(c_httpauth_user, Buf, 0, ':');
 636                 StrBufExtract_token(c_httpauth_pass, Buf, 1, ':');
 637         }
 638         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 639             (vLine!=NULL)) {
 640                 ContentLength = StrToi((StrBuf*)vLine);
 641         }
 642         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 643             (vLine!=NULL)) {
 644                 ContentType = (StrBuf*)vLine;
 645         }
 646         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 647             (vLine!=NULL)) {
 648                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 649 #ifdef TECH_PREVIEW
 650                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 651                         WCC->is_mobile = 1;
 652                 }
 653                 else {
 654                         WCC->is_mobile = 0;
 655                 }
 656 #endif
 657         }
 658         if ((follow_xff) &&
 659             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 660             (vLine != NULL)) {
 661                 WCC->http_host = (StrBuf*)vLine;
 662         }
 663         if ((StrLength(WCC->http_host) == 0) &&
 664             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 665             (vLine!=NULL)) {
 666                 WCC->http_host = (StrBuf*)vLine;
 667         }
 668
 669         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 670             (vLine!=NULL)) {
 671                 browser_host = (StrBuf*) vLine;
 672
 673                 while (StrBufNum_tokens(browser_host, ',') > 1) {
 674                         StrBufRemove_token(browser_host, 0, ',');
 675                 }
 676                 StrBufTrim(browser_host);
 677         }
 678
 679         if (ContentLength > 0) {
 680                 content = NewStrBuf();
 681                 StrBufPrintf(content, "Content-type: %s\n"
 682                          "Content-length: %d\n\n",
 683                          ChrPtr(ContentType), ContentLength);
 684 /*
 685                 hprintf("Content-type: %s\n"
 686                         "Content-length: %d\n\n",
 687                         ContentType, ContentLength);
 688 */
 689                 body_start = StrLength(content);
 690
 691                 /** Read the entire input data at once. */
 692                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
 693
 694                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 695                         StrBufCutLeft(content, body_start);
 696                         ParseURLParams(content);
 697                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 698                         content_end = ChrPtr(content) + ContentLength + body_start;
 699                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 700                 }
 701         } else {
 702                 content = NULL;
 703         }
 704
 705         /* make a note of where we are in case the user wants to save it */
 706         WCC->this_page = NewStrBufDup(ReqLine);
 707         StrBufRemove_token(WCC->this_page, 2, ' ');
 708         StrBufRemove_token(WCC->this_page, 0, ' ');
 709
 710         /* If there are variables in the URL, we must grab them now */
 711         UrlLine = NewStrBufDup(ReqLine);
 712         len = StrLength(UrlLine);
 713         pch = pchs = ChrPtr(UrlLine);
 714         pche = pchs + len;
 715         while (pch < pche) {
 716                 if ((*pch == '?') || (*pch == '&')) {
 717                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 718                         ParseURLParams(UrlLine);
 719                         break;
 720                 }
 721                 pch ++;
 722         }
 723         FreeStrBuf(&UrlLine);
 724
 725         /* If it's a "force 404" situation then display the error and bail. */
 726         if (!strcmp(action, "404")) {
 727                 hprintf("HTTP/1.1 404 Not found\r\n");
 728                 hprintf("Content-Type: text/plain\r\n");
 729                 wprintf("Not found\r\n");
 730                 end_burst();
 731                 goto SKIP_ALL_THIS_CRAP;
 732         }
 733
 734         /* Static content can be sent without connecting to Citadel. */
 735         is_static = 0;
 736         for (a=0; a<ndirs && ! is_static; ++a) {
 737                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 738                         is_static = 1;
 739                         n_static = a;
 740                 }
 741         }
 742         if (is_static) {
 743                 if (nBackDots < 2)
 744                 {
 745                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 746                                  static_dirs[n_static],
 747                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 748                         for (a=0; a<8; ++a) {
 749                                 if (buf[strlen(buf)-1] == '/') {
 750                                         buf[strlen(buf)-1] = 0;
 751                                 }
 752                         }
 753                         for (a = 0; a < strlen(buf); ++a) {
 754                                 if (isspace(buf[a])) {
 755                                         buf[a] = 0;
 756                                 }
 757                         }
 758                         output_static(buf);
 759                 }
 760                 else
 761                 {
 762                         lprintf(9, "Suspicious request. Ignoring.");
 763                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 764                         hprintf("Content-Type: text/plain\r\n\r\n");
 765                         wprintf("You have sent a malformed or invalid request.\r\n");
 766                         end_burst();
 767                 }
 768                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 769         }
 770
 771         /* If the client sent a nonce that is incorrect, kill the request. */
 772         if (strlen(bstr("nonce")) > 0) {
 773                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 774                         bstr("nonce"), WCC->nonce);
 775                 if (ibstr("nonce") != WCC->nonce) {
 776                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 777                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 778                         hprintf("Content-Type: text/plain\r\n\r\n");
 779                         wprintf("Security check failed.\r\n");
 780                         end_burst();
 781                         goto SKIP_ALL_THIS_CRAP;
 782                 }
 783         }
 784
 785         /*
 786          * If we're not connected to a Citadel server, try to hook up the
 787          * connection now.
 788          */
 789         if (!WCC->connected) {
 790                 if (!strcasecmp(ctdlhost, "uds")) {
 791                         /* unix domain socket */
 792                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 793                         WCC->serv_sock = uds_connectsock(buf);
 794                 }
 795                 else {
 796                         /* tcp socket */
 797                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 798                 }
 799
 800                 if (WCC->serv_sock < 0) {
 801                         do_logout();
 802                         goto SKIP_ALL_THIS_CRAP;
 803                 }
 804                 else {
 805                         WCC->connected = 1;
 806                         serv_getln(buf, sizeof buf);    /* get the server greeting */
 807
 808                         /* Are there too many users already logged in? */
 809                         if (!strncmp(buf, "571", 3)) {
 810                                 wprintf(_("This server is already serving its maximum number of users and cannot accept any additional logins at this time.  Please try again later or contact your system administrator."));
 811                                 end_burst();
 812                                 end_webcit_session();
 813                                 goto SKIP_ALL_THIS_CRAP;
 814                         }
 815
 816                         /*
 817                          * From what host is our user connecting?  Go with
 818                          * the host at the other end of the HTTP socket,
 819                          * unless we are following X-Forwarded-For: headers
 820                          * and such a header has already turned up something.
 821                          */
 822                         if ( (!follow_xff) || (StrLength(browser_host) == 0) ) {
 823                                 if (browser_host == NULL) {
 824                                         browser_host = NewStrBuf();
 825                                         Put(HTTPHeaders, HKEY("FreeMeWithTheOtherHeaders"),
 826                                             browser_host, HFreeStrBuf);
 827                                 }
 828                                 locate_host(browser_host, WCC->http_sock);
 829                         }
 830
 831                         WCC->serv_info = get_serv_info(browser_host, user_agent);
 832                         if (WCC->serv_info->serv_rev_level < MINIMUM_CIT_VERSION) {
 833                                 begin_burst();
 834                                 wprintf(_("You are connected to a Citadel "
 835                                         "server running Citadel %d.%02d. \n"
 836                                         "In order to run this version of WebCit "
 837                                         "you must also have Citadel %d.%02d or"
 838                                         " newer.\n\n\n"),
 839                                                 WCC->serv_info->serv_rev_level / 100,
 840                                                 WCC->serv_info->serv_rev_level % 100,
 841                                                 MINIMUM_CIT_VERSION / 100,
 842                                                 MINIMUM_CIT_VERSION % 100
 843                                         );
 844                                 end_burst();
 845                                 end_webcit_session();
 846                                 goto SKIP_ALL_THIS_CRAP;
 847                         }
 848                 }
 849         }
 850 /*///////todo: restore language in this case */
 851         /*
 852          * Functions which can be performed without logging in
 853          */
 854         if (!strcasecmp(action, "listsub")) {
 855                 do_listsub();
 856                 goto SKIP_ALL_THIS_CRAP;
 857         }
 858         if (!strcasecmp(action, "freebusy")) {
 859                 do_freebusy(ChrPtr(ReqLine));
 860                 goto SKIP_ALL_THIS_CRAP;
 861         }
 862
 863         /*
 864          * If we're not logged in, but we have HTTP Authentication data,
 865          * try logging in to Citadel using that.
 866          */
 867         if ((!WCC->logged_in)
 868             && (StrLength(c_httpauth_user) > 0)
 869             && (StrLength(c_httpauth_pass) > 0))
 870         {
 871                 FlushStrBuf(Buf);
 872                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 873                 StrBuf_ServGetln(Buf);
 874                 if (GetServerStatus(Buf, NULL) == 3) {
 875                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 876                         StrBuf_ServGetln(Buf);
 877                         if (GetServerStatus(Buf, NULL) == 2) {
 878                                 become_logged_in(c_httpauth_user,
 879                                                 c_httpauth_pass, Buf);
 880                                 if (WCC->httpauth_user == NULL)
 881                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 882                                 else {
 883                                         FlushStrBuf(WCC->httpauth_user);
 884                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 885                                 }
 886                                 if (WCC->httpauth_pass == NULL)
 887                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 888                                 else {
 889                                         FlushStrBuf(WCC->httpauth_pass);
 890                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 891                                 }
 892                         } else {
 893                                 /* Should only display when password is wrong */
 894                                 authorization_required(&buf[4]);
 895                                 FreeStrBuf(&Buf);
 896                                 goto SKIP_ALL_THIS_CRAP;
 897                         }
 898                 }
 899         }
 900
 901         /* This needs to run early */
 902 #ifdef TECH_PREVIEW
 903         if (!strcasecmp(action, "rss")) {
 904                 display_rss(sbstr("room"), request_method);
 905                 goto SKIP_ALL_THIS_CRAP;
 906         }
 907 #endif
 908
 909         /*
 910          * The GroupDAV stuff relies on HTTP authentication instead of
 911          * our session's authentication.
 912          */
 913         if (!strncasecmp(action, "groupdav", 8)) {
 914                 groupdav_main(HTTPHeaders,
 915                               ReqLine, request_method,
 916                               ContentType, /* do GroupDAV methods */
 917                               ContentLength, content, body_start);
 918                 if (!WCC->logged_in) {
 919                         WCC->killthis = 1;      /* If not logged in, don't */
 920                 }                               /* keep the session active */
 921                 goto SKIP_ALL_THIS_CRAP;
 922         }
 923
 924
 925         /*
 926          * Automatically send requests with any method other than GET or
 927          * POST to the GroupDAV code as well.
 928          */
 929         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 930                 groupdav_main(HTTPHeaders, ReqLine,
 931                               request_method, ContentType, /** do GroupDAV methods */
 932                               ContentLength, content, body_start);
 933                 if (!WCC->logged_in) {
 934                         WCC->killthis = 1;      /** If not logged in, don't */
 935                 }                               /** keep the session active */
 936                 goto SKIP_ALL_THIS_CRAP;
 937         }
 938
 939         /*
 940          * If we're not logged in, but we have username and password cookies
 941          * supplied by the browser, try using them to log in.
 942          */
 943         if ((!WCC->logged_in)
 944            && (StrLength(c_username)>0)
 945            && (StrLength(c_password)>0)) {
 946                 serv_printf("USER %s", ChrPtr(c_username));
 947                 StrBuf_ServGetln(Buf);
 948                 if (GetServerStatus(Buf, NULL) == 3) {
 949                         serv_printf("PASS %s", ChrPtr(c_password));
 950                         StrBuf_ServGetln(Buf);
 951                         if (GetServerStatus(Buf, NULL) == 2) {
 952                                 StrBuf *Lang;
 953                                 become_logged_in(c_username, c_password, Buf);
 954                                 if (get_preference("language", &Lang)) {
 955                                         set_selected_language(ChrPtr(Lang));
 956                                         go_selected_language();         /* set locale */
 957                                 }
 958                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 959                         }
 960                 }
 961         }
 962
 963         /*
 964          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 965          * prior to doing anything else.
 966          */
 967         if (havebstr("gotofirst")) {
 968                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 969         }
 970
 971         /*
 972          * If we don't have a current room, but a cookie specifying the
 973          * current room is supplied, make an effort to go there.
 974          */
 975         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 976                 serv_printf("GOTO %s", ChrPtr(c_roomname));
 977                 StrBuf_ServGetln(Buf);
 978                 if (GetServerStatus(Buf, NULL) == 2) {
 979                         if (WCC->wc_roomname == NULL) {
 980                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
 981                         }
 982                         else {
 983                                 FlushStrBuf(WCC->wc_roomname);
 984                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
 985                         }
 986                 }
 987         }
 988
 989         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 990                 Handler = (WebcitHandler*) vHandler;
 991         if (Handler != NULL) {
 992                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 993                         display_login(NULL);
 994                 }
 995                 else {
 996                         if((Handler->Flags & NEED_URL)) {
 997                                 if (WCC->UrlFragment1 == NULL)
 998                                         WCC->UrlFragment1 = NewStrBuf();
 999                                 if (WCC->UrlFragment2 == NULL)
1000                                         WCC->UrlFragment2 = NewStrBuf();
1001                                 if (WCC->UrlFragment3 == NULL)
1002                                         WCC->UrlFragment3 = NewStrBuf();
1003                                 StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
1004                                 StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
1005                                 StrBufPrintf(WCC->UrlFragment3, "%s", index[2]);
1006                         }
1007                         if ((Handler->Flags & AJAX) != 0)
1008                                 begin_ajax_response();
1009                         Handler->F();
1010                         if ((Handler->Flags & AJAX) != 0)
1011                                 end_ajax_response();
1012                 }
1013         }
1014         /* When all else fais, display the main menu. */
1015         else {
1016                 if (!WCC->logged_in)
1017                         display_login(NULL);
1018                 else
1019                         display_main_menu();
1020         }
1021
1022 SKIP_ALL_THIS_CRAP:
1023         if (WCC->SavePrefsToServer) {
1024                 save_preferences();
1025                 WCC->SavePrefsToServer = 0;
1026         }
1027         FreeStrBuf(&Buf);
1028         FreeStrBuf(&c_username);
1029         FreeStrBuf(&c_password);
1030         FreeStrBuf(&c_roomname);
1031         FreeStrBuf(&c_httpauth_user);
1032         FreeStrBuf(&c_httpauth_pass);
1033         FreeStrBuf(&WCC->this_page);
1034         fflush(stdout);
1035         if (content != NULL) {
1036                 FreeStrBuf(&content);
1037                 content = NULL;
1038         }
1039         DeleteHash(&WCC->urlstrings);
1040         if (WCC->upload_length > 0) {
1041                 free(WCC->upload);
1042                 WCC->upload_length = 0;
1043         }
1044         FreeStrBuf(&WCC->trailing_javascript);
1045         WCC->http_host = NULL;
1046 }
1047
1048
1049 /*
1050  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1051  */
1052 void sleeeeeeeeeep(int seconds)
1053 {
1054         struct timeval tv;
1055
1056         tv.tv_sec = seconds;
1057         tv.tv_usec = 0;
1058         select(0, NULL, NULL, NULL, &tv);
1059 }
1060
1061
1062 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1063 {
1064         wcsession *WCC = WC;
1065         if (WCC != NULL)
1066                 return (!IsEmptyStr(WCC->ImportantMessage));
1067         else
1068                 return 0;
1069 }
1070
1071 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1072 {
1073         wcsession *WCC = WC;
1074
1075         if (WCC != NULL) {
1076 /*
1077                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1078                                      WCC->ImportantMessage, 0);
1079 */
1080                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1081                 WCC->ImportantMessage[0] = '\0';
1082         }
1083 }
1084
1085 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1086 {
1087         wcsession *WCC = WC;
1088
1089         if (WCC != NULL)
1090                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1091 }
1092
1093 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1094 {
1095         extern StrBuf *csslocal;
1096         StrBufAppendBuf(Target,
1097                         csslocal, 0);
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
1112         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1113         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1114         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1115         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1116 }