webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22
  23 HashList *HandlerHash = NULL;
  24
  25 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31
  32         if (HandlerHash == NULL)
  33                 HandlerHash = NewHash(1, NULL);
  34
  35         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  36         NewHandler->F = F;
  37         NewHandler->Flags = Flags;
  38         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  39 }
  40
  41
  42 /*
  43  * web-printing funcion. uses our vsnprintf wrapper
  44  */
  45 void wprintf(const char *format,...)
  46 {
  47         wcsession *WCC = WC;
  48         va_list arg_ptr;
  49
  50         if (WCC->WBuf == NULL)
  51                 WCC->WBuf = NewStrBuf();
  52
  53         va_start(arg_ptr, format);
  54         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  55         va_end(arg_ptr);
  56 }
  57
  58 /*
  59  * http-header-printing funcion. uses our vsnprintf wrapper
  60  */
  61 void hprintf(const char *format,...)
  62 {
  63         wcsession *WCC = WC;
  64         va_list arg_ptr;
  65
  66         va_start(arg_ptr, format);
  67         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  68         va_end(arg_ptr);
  69 }
  70
  71
  72
  73 /*
  74  * wrap up an HTTP session, closes tags, etc.
  75  *
  76  * print_standard_html_footer should be set to:
  77  * 0            - to transmit only,
  78  * nonzero      - to append the closing tags
  79  */
  80 void wDumpContent(int print_standard_html_footer)
  81 {
  82         if (print_standard_html_footer) {
  83                 wprintf("</div> <!-- end of 'content' div -->\n");
  84                 do_template("trailing", NULL);
  85         }
  86
  87         /* If we've been saving it all up for one big output burst,
  88          * go ahead and do that now.
  89          */
  90         end_burst();
  91 }
  92
  93
  94
  95
  96 /*
  97  * Output HTTP headers and leading HTML for a page
  98  */
  99 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 100                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 101
 102                         int do_room_banner,     /* 0=no, 1=yes,
 103                                                  * 2 = I'm going to embed my own, so don't open the
 104                                                  *     <div id="content"> either.
 105                                                  */
 106
 107                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 108                         int suppress_check,     /* 1 = suppress check for instant messages          */
 109                         int cache               /* 1 = allow browser to cache this page             */
 110 ) {
 111         wcsession *WCC = WC;
 112         char cookie[1024];
 113         char httpnow[128];
 114
 115         hprintf("HTTP/1.1 200 OK\n");
 116         http_datestring(httpnow, sizeof httpnow, time(NULL));
 117
 118         if (do_httpheaders) {
 119                 if (WCC->serv_info != NULL)
 120                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 121                                 "Server: %s / %s\n"
 122                                 "Connection: close\r\n",
 123                                 PACKAGE_STRING,
 124                                 ChrPtr(WCC->serv_info->serv_software));
 125                 else
 126                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 127                                 "Server: %s / [n/a]\n"
 128                                 "Connection: close\r\n",
 129                                 PACKAGE_STRING);
 130         }
 131
 132         if (cache) {
 133                 char httpTomorow[128];
 134
 135                 http_datestring(httpTomorow, sizeof httpTomorow,
 136                                 time(NULL) + 60 * 60 * 24 * 2);
 137
 138                 hprintf("Pragma: public\r\n"
 139                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 140                         "Last-modified: %s\r\n"
 141                         "Expires: %s\r\n",
 142                         httpnow,
 143                         httpTomorow
 144                 );
 145         }
 146         else {
 147                 hprintf("Pragma: no-cache\r\n"
 148                         "Cache-Control: no-store\r\n"
 149                         "Expires: -1\r\n"
 150                 );
 151         }
 152
 153         stuff_to_cookie(cookie, 1024,
 154                         WCC->wc_session, WCC->wc_username,
 155                         WCC->wc_password, WCC->wc_roomname);
 156
 157         if (unset_cookies) {
 158                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 159         } else {
 160                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 161                 if (server_cookie != NULL) {
 162                         hprintf("%s\n", server_cookie);
 163                 }
 164         }
 165
 166         if (do_htmlhead) {
 167                 begin_burst();
 168                 do_template("head", NULL);
 169
 170                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 171                 if (!IsEmptyStr(WC->ImportantMessage)) {
 172                         wprintf("<div id=\"important_message\">\n"
 173                                 "<span class=\"imsg\">");
 174                         escputs(WC->ImportantMessage);
 175                         wprintf("</span><br />\n"
 176                                 "</div>\n"
 177                         );
 178                         StrBufAppendPrintf(WCC->trailing_javascript,
 179                                 "setTimeout('hide_imsg_popup()', 5000); \n"
 180                         );
 181                         WCC->ImportantMessage[0] = 0;
 182                 }
 183
 184                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 185                   //DoTemplate(HKEY("iconbar"), NULL, &NoCtx);
 186                         page_popup();
 187                 }
 188
 189                 if (do_room_banner == 1) {
 190                         wprintf("<div id=\"banner\">\n");
 191                         embed_room_banner(NULL, navbar_default);
 192                         wprintf("</div>\n");
 193                 }
 194         }
 195
 196         if (do_room_banner == 1) {
 197                 wprintf("<div id=\"content\">\n");
 198         }
 199 }
 200
 201 void output_custom_content_header(const char *ctype) {
 202   hprintf("HTTP/1.1 200 OK\r\n");
 203   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 204   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 205   hprintf("Connection: close\r\n");
 206 }
 207
 208
 209 /*
 210  * Generic function to do an HTTP redirect.  Easy and fun.
 211  */
 212 void http_redirect(const char *whichpage) {
 213         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 214         hprintf("Location: %s\r\n", whichpage);
 215         hprintf("URI: %s\r\n", whichpage);
 216         hprintf("Content-type: text/html; charset=utf-8\r\n");
 217         wprintf("<html><body>");
 218         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 219         wprintf("</body></html>\n");
 220         end_burst();
 221 }
 222
 223
 224
 225 /*
 226  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 227  */
 228 void http_transmit_thing(const char *content_type,
 229                          int is_static) {
 230
 231 #ifndef TECH_PREVIEW
 232         lprintf(9, "http_transmit_thing(%s)%s\n",
 233                 content_type,
 234                 (is_static ? " (static)" : "")
 235         );
 236 #endif
 237         output_headers(0, 0, 0, 0, 0, is_static);
 238
 239         hprintf("Content-type: %s\r\n"
 240                 "Server: %s\r\n"
 241                 "Connection: close\r\n",
 242                 content_type,
 243                 PACKAGE_STRING);
 244
 245         end_burst();
 246 }
 247
 248 /*
 249  * print menu box like used in the floor view or admin interface.
 250  * This function takes pair of strings as va_args,
 251  * Title        Title string of the box
 252  * Class        CSS Class for the box
 253  * nLines       How many string pairs should we print? (URL, UrlText)
 254  * ...          Pairs of URL Strings and their Names
 255  */
 256 void print_menu_box(char* Title, char *Class, int nLines, ...)
 257 {
 258         va_list arg_list;
 259         long i;
 260
 261         svput("BOXTITLE", WCS_STRING, Title);
 262         do_template("beginboxx", NULL);
 263
 264         wprintf("<ul class=\"%s\">", Class);
 265
 266         va_start(arg_list, nLines);
 267         for (i = 0; i < nLines; ++i)
 268         {
 269                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 270                 wprintf((char *) va_arg(arg_list, char *));
 271                 wprintf("</a></li>\n");
 272         }
 273         va_end (arg_list);
 274
 275         wprintf("</a></li>\n");
 276
 277         wprintf("</ul>");
 278
 279         do_template("endbox", NULL);
 280 }
 281
 282
 283 /*
 284  * dump out static pages from disk
 285  */
 286 void output_static(const char *what)
 287 {
 288         int fd;
 289         struct stat statbuf;
 290         off_t bytes;
 291         off_t count = 0;
 292         const char *content_type;
 293         int len;
 294         const char *Err;
 295
 296         fd = open(what, O_RDONLY);
 297         if (fd <= 0) {
 298                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 299                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 300                 hprintf("Content-Type: text/plain\r\n");
 301                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 302                 end_burst();
 303         } else {
 304                 len = strlen (what);
 305                 content_type = GuessMimeByFilename(what, len);
 306
 307                 if (fstat(fd, &statbuf) == -1) {
 308                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 309                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 310                         hprintf("Content-Type: text/plain\r\n");
 311                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 312                         end_burst();
 313                         return;
 314                 }
 315
 316                 count = 0;
 317                 bytes = statbuf.st_size;
 318
 319                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 320                 {
 321                         if (fd > 0) close(fd);
 322                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 323                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 324                                 hprintf("Content-Type: text/plain\r\n");
 325                                 end_burst();
 326                                 return;
 327                 }
 328
 329
 330                 close(fd);
 331 #ifndef TECH_PREVIEW
 332                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 333 #endif
 334                 http_transmit_thing(content_type, 1);
 335         }
 336         if (yesbstr("force_close_session")) {
 337                 end_webcit_session();
 338         }
 339 }
 340
 341
 342 /*
 343  * Convenience functions to display a page containing only a string
 344  *
 345  * titlebarcolor        color of the titlebar of the frame
 346  * titlebarmsg          text to display in the title bar
 347  * messagetext          body of the box
 348  */
 349 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 350 {
 351         hprintf("HTTP/1.1 200 OK\n");
 352         output_headers(1, 1, 2, 0, 0, 0);
 353         wprintf("<div id=\"banner\">\n");
 354         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 355         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 356         wprintf("</td></tr></table>\n");
 357         wprintf("</div>\n<div id=\"content\">\n");
 358         escputs(messagetext);
 359
 360         wprintf("<hr />\n");
 361         wDumpContent(1);
 362 }
 363
 364
 365 /*
 366  * Display a blank page.
 367  */
 368 void blank_page(void) {
 369         output_headers(1, 1, 0, 0, 0, 0);
 370         wDumpContent(2);
 371 }
 372
 373
 374 /*
 375  * A template has been requested
 376  */
 377 void url_do_template(void) {
 378         const StrBuf *MimeType;
 379         const StrBuf *Tmpl = sbstr("template");
 380         begin_burst();
 381         output_headers(0, 0, 0, 0, 1, 0);
 382         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 383         http_transmit_thing(ChrPtr(MimeType), 0);
 384 }
 385
 386
 387
 388 /*
 389  * convenience function to indicate success
 390  */
 391 void display_success(char *successmessage)
 392 {
 393         convenience_page("007700", "OK", successmessage);
 394 }
 395
 396
 397 /*
 398  * Authorization required page
 399  * This is probably temporary and should be revisited
 400  */
 401 void authorization_required(const char *message)
 402 {
 403         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 404         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 405         hprintf("Content-Type: text/html\r\n");
 406         wprintf("<h1>");
 407         wprintf(_("Authorization Required"));
 408         wprintf("</h1>\r\n");
 409         wprintf(_("The resource you requested requires a valid username and password. "
 410                 "You could not be logged in: %s\n"), message);
 411         wDumpContent(0);
 412
 413 }
 414
 415 /*
 416  * Convenience functions to wrap around asynchronous ajax responses
 417  */
 418 void begin_ajax_response(void) {
 419         wcsession *WCC = WC;
 420
 421         FlushStrBuf(WCC->HBuf);
 422         output_headers(0, 0, 0, 0, 0, 0);
 423
 424         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 425                 "Server: %s\r\n"
 426                 "Connection: close\r\n"
 427                 ,
 428                 PACKAGE_STRING);
 429         begin_burst();
 430 }
 431
 432 /*
 433  * print ajax response footer
 434  */
 435 void end_ajax_response(void) {
 436         wDumpContent(0);
 437 }
 438
 439 /*
 440  * Wraps a Citadel server command in an AJAX transaction.
 441  */
 442 void ajax_servcmd(void)
 443 {
 444         char buf[1024];
 445         char gcontent[1024];
 446         char *junk;
 447         size_t len;
 448
 449         begin_ajax_response();
 450
 451         serv_printf("%s", bstr("g_cmd"));
 452         serv_getln(buf, sizeof buf);
 453         wprintf("%s\n", buf);
 454
 455         if (buf[0] == '8') {
 456                 serv_printf("\n\n000");
 457         }
 458         if ((buf[0] == '1') || (buf[0] == '8')) {
 459                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 460                         wprintf("%s\n", gcontent);
 461                 }
 462                 wprintf("000");
 463         }
 464         if (buf[0] == '4') {
 465                 text_to_server(bstr("g_input"));
 466                 serv_puts("000");
 467         }
 468         if (buf[0] == '6') {
 469                 len = atol(&buf[4]);
 470                 junk = malloc(len);
 471                 serv_read(junk, len);
 472                 free(junk);
 473         }
 474         if (buf[0] == '7') {
 475                 len = atol(&buf[4]);
 476                 junk = malloc(len);
 477                 memset(junk, 0, len);
 478                 serv_write(junk, len);
 479                 free(junk);
 480         }
 481
 482         end_ajax_response();
 483
 484         /*
 485          * This is kind of an ugly hack, but this is the only place it can go.
 486          * If the command was GEXP, then the instant messenger window must be
 487          * running, so reset the "last_pager_check" watchdog timer so
 488          * that page_popup() doesn't try to open it a second time.
 489          */
 490         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 491                 WC->last_pager_check = time(NULL);
 492         }
 493 }
 494
 495
 496 /*
 497  * Helper function for the asynchronous check to see if we need
 498  * to open the instant messenger window.
 499  */
 500 void seconds_since_last_gexp(void)
 501 {
 502         char buf[256];
 503
 504         if ( (time(NULL) - WC->last_pager_check) < 30) {
 505                 wprintf("NO\n");
 506         }
 507         else {
 508                 memset(buf, 0, 5);
 509                 serv_puts("NOOP");
 510                 serv_getln(buf, sizeof buf);
 511                 if (buf[3] == '*') {
 512                         wprintf("YES");
 513                 }
 514                 else {
 515                         wprintf("NO");
 516                 }
 517         }
 518 }
 519
 520 /**
 521  * \brief Detects a 'mobile' user agent
 522  */
 523 int is_mobile_ua(char *user_agent) {
 524       if (strstr(user_agent,"iPhone OS") != NULL) {
 525         return 1;
 526       } else if (strstr(user_agent,"Windows CE") != NULL) {
 527         return 1;
 528       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 529         return 1;
 530       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 531         return 1;
 532       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 533               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 534           return 1;
 535           }
 536       return 0;
 537 }
 538
 539
 540 /*
 541  * Entry point for WebCit transaction
 542  */
 543 void session_loop(HashList *HTTPHeaders,
 544                   StrBuf *ReqLine,
 545                   StrBuf *request_method,
 546                   StrBuf *ReadBuf,
 547                   const char **Pos)
 548 {
 549         StrBuf *Buf;
 550         const char *pch, *pchs, *pche;
 551         void *vLine;
 552         char action[1024];
 553         char arg[8][128];
 554         size_t sizes[10];
 555         char *index[10];
 556         char buf[SIZ];
 557         int a, nBackDots, nEmpty;
 558         int ContentLength = 0;
 559         StrBuf *ContentType = NULL;
 560         StrBuf *UrlLine = NULL;
 561         StrBuf *content = NULL;
 562         const char *content_end = NULL;
 563         StrBuf *browser_host = NULL;
 564         char user_agent[256];
 565         int body_start = 0;
 566         int is_static = 0;
 567         int n_static = 0;
 568         int len = 0;
 569         void *vHandler;
 570         WebcitHandler *Handler;
 571         struct timeval tx_start;
 572         struct timeval tx_finish;
 573
 574         /*
 575          * We stuff these with the values coming from the client cookies,
 576          * so we can use them to reconnect a timed out session if we have to.
 577          */
 578         StrBuf *c_username;
 579         StrBuf *c_password;
 580         StrBuf *c_roomname;
 581         char c_httpauth_string[SIZ];
 582         StrBuf *c_httpauth_user;
 583         StrBuf *c_httpauth_pass;
 584         wcsession *WCC;
 585
 586         gettimeofday(&tx_start, NULL);          /* start a stopwatch for performance timing */
 587
 588         Buf = NewStrBuf();
 589         c_username = NewStrBuf();
 590         c_password = NewStrBuf();
 591         c_roomname = NewStrBuf();
 592         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 593         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 594         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 595
 596         WCC= WC;
 597         if (WCC->WBuf == NULL)
 598                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 599         FlushStrBuf(WCC->WBuf);
 600
 601         if (WCC->HBuf == NULL)
 602                 WCC->HBuf = NewStrBuf();
 603         FlushStrBuf(WCC->HBuf);
 604
 605         WCC->upload_length = 0;
 606         WCC->upload = NULL;
 607         WCC->is_mobile = 0;
 608         WCC->trailing_javascript = NewStrBuf();
 609         WCC->nWildfireHeaders = 0;
 610
 611         /** Figure out the action */
 612         index[0] = action;
 613         sizes[0] = sizeof action;
 614         for (a=1; a<9; a++)
 615         {
 616                 index[a] = arg[a-1];
 617                 sizes[a] = sizeof arg[a-1];
 618         }
 619         nBackDots = 0;
 620         nEmpty = 0;
 621         for ( a = 0; a < 9; ++a)
 622         {
 623                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 624                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 625                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 626                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 627                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 628                         nBackDots++;
 629                 if (index[a][0] == '\0')
 630                         nEmpty++;
 631         }
 632
 633
 634         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 635             (vLine != NULL)){
 636                 cookie_to_stuff((StrBuf *)vLine, NULL,
 637                                 c_username,
 638                                 c_password,
 639                                 c_roomname);
 640         }
 641         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 642             (vLine!=NULL)) {
 643                 StrBufDecodeBase64((StrBuf*)vLine);
 644                 StrBufExtract_token(c_httpauth_user, (StrBuf*)vLine, 0, ':');
 645                 StrBufExtract_token(c_httpauth_pass, (StrBuf*)vLine, 1, ':');
 646         }
 647         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 648             (vLine!=NULL)) {
 649                 ContentLength = StrToi((StrBuf*)vLine);
 650         }
 651         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 652             (vLine!=NULL)) {
 653                 ContentType = (StrBuf*)vLine;
 654         }
 655         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 656             (vLine!=NULL)) {
 657                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 658 #ifdef TECH_PREVIEW
 659                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 660                         WCC->is_mobile = 1;
 661                 }
 662                 else {
 663                         WCC->is_mobile = 0;
 664                 }
 665 #endif
 666         }
 667         if ((follow_xff) &&
 668             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 669             (vLine != NULL)) {
 670                 WCC->http_host = (StrBuf*)vLine;
 671         }
 672         if ((StrLength(WCC->http_host) == 0) &&
 673             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 674             (vLine!=NULL)) {
 675                 WCC->http_host = (StrBuf*)vLine;
 676         }
 677
 678         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 679             (vLine!=NULL)) {
 680                 browser_host = (StrBuf*) vLine;
 681
 682                 while (StrBufNum_tokens(browser_host, ',') > 1) {
 683                         StrBufRemove_token(browser_host, 0, ',');
 684                 }
 685                 StrBufTrim(browser_host);
 686         }
 687
 688         if (ContentLength > 0) {
 689                 content = NewStrBuf();
 690                 StrBufPrintf(content, "Content-type: %s\n"
 691                          "Content-length: %d\n\n",
 692                          ChrPtr(ContentType), ContentLength);
 693 /*
 694                 hprintf("Content-type: %s\n"
 695                         "Content-length: %d\n\n",
 696                         ContentType, ContentLength);
 697 */
 698                 body_start = StrLength(content);
 699
 700                 /** Read the entire input data at once. */
 701                 client_read_to(&WCC->http_sock,
 702                                content,
 703                                ReadBuf, Pos,
 704                                ContentLength,
 705                                SLEEPING);
 706
 707                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 708                         StrBufCutLeft(content, body_start);
 709                         ParseURLParams(content);
 710                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 711                         content_end = ChrPtr(content) + ContentLength + body_start;
 712                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 713                 }
 714         } else {
 715                 content = NULL;
 716         }
 717
 718         /* make a note of where we are in case the user wants to save it */
 719         WCC->this_page = NewStrBufDup(ReqLine);
 720         StrBufRemove_token(WCC->this_page, 2, ' ');
 721         StrBufRemove_token(WCC->this_page, 0, ' ');
 722
 723         /* If there are variables in the URL, we must grab them now */
 724         UrlLine = NewStrBufDup(ReqLine);
 725         len = StrLength(UrlLine);
 726         pch = pchs = ChrPtr(UrlLine);
 727         pche = pchs + len;
 728         while (pch < pche) {
 729                 if ((*pch == '?') || (*pch == '&')) {
 730                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 731                         ParseURLParams(UrlLine);
 732                         break;
 733                 }
 734                 pch ++;
 735         }
 736         FreeStrBuf(&UrlLine);
 737
 738         /* If it's a "force 404" situation then display the error and bail. */
 739         if (!strcmp(action, "404")) {
 740                 hprintf("HTTP/1.1 404 Not found\r\n");
 741                 hprintf("Content-Type: text/plain\r\n");
 742                 wprintf("Not found\r\n");
 743                 end_burst();
 744                 goto SKIP_ALL_THIS_CRAP;
 745         }
 746
 747         /* Static content can be sent without connecting to Citadel. */
 748         is_static = 0;
 749         for (a=0; a<ndirs && ! is_static; ++a) {
 750                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 751                         is_static = 1;
 752                         n_static = a;
 753                 }
 754         }
 755         if (is_static) {
 756                 if (nBackDots < 2)
 757                 {
 758                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 759                                  static_dirs[n_static],
 760                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 761                         for (a=0; a<8; ++a) {
 762                                 if (buf[strlen(buf)-1] == '/') {
 763                                         buf[strlen(buf)-1] = 0;
 764                                 }
 765                         }
 766                         for (a = 0; a < strlen(buf); ++a) {
 767                                 if (isspace(buf[a])) {
 768                                         buf[a] = 0;
 769                                 }
 770                         }
 771                         output_static(buf);
 772                 }
 773                 else
 774                 {
 775                         lprintf(9, "Suspicious request. Ignoring.");
 776                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 777                         hprintf("Content-Type: text/plain\r\n\r\n");
 778                         wprintf("You have sent a malformed or invalid request.\r\n");
 779                         end_burst();
 780                 }
 781                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 782         }
 783
 784         /* If the client sent a nonce that is incorrect, kill the request. */
 785         if (strlen(bstr("nonce")) > 0) {
 786                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 787                         bstr("nonce"), WCC->nonce);
 788                 if (ibstr("nonce") != WCC->nonce) {
 789                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 790                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 791                         hprintf("Content-Type: text/plain\r\n\r\n");
 792                         wprintf("Security check failed.\r\n");
 793                         end_burst();
 794                         goto SKIP_ALL_THIS_CRAP;
 795                 }
 796         }
 797
 798         /*
 799          * If we're not connected to a Citadel server, try to hook up the
 800          * connection now.
 801          */
 802         if (!WCC->connected) {
 803                 if (WCC->ReadBuf == NULL)
 804                         WCC->ReadBuf = NewStrBuf();
 805                 if (!strcasecmp(ctdlhost, "uds")) {
 806                         /* unix domain socket */
 807                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 808                         WCC->serv_sock = uds_connectsock(buf);
 809                 }
 810                 else {
 811                         /* tcp socket */
 812                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 813                 }
 814
 815                 if (WCC->serv_sock < 0) {
 816                         do_logout();
 817                         FreeStrBuf(&WCC->ReadBuf);
 818                         goto SKIP_ALL_THIS_CRAP;
 819                 }
 820                 else {
 821                         WCC->connected = 1;
 822                         serv_getln(buf, sizeof buf);    /* get the server greeting */
 823
 824                         /* Are there too many users already logged in? */
 825                         if (!strncmp(buf, "571", 3)) {
 826                                 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."));
 827                                 end_burst();
 828                                 end_webcit_session();
 829                                 goto SKIP_ALL_THIS_CRAP;
 830                         }
 831
 832                         /*
 833                          * From what host is our user connecting?  Go with
 834                          * the host at the other end of the HTTP socket,
 835                          * unless we are following X-Forwarded-For: headers
 836                          * and such a header has already turned up something.
 837                          */
 838                         if ( (!follow_xff) || (StrLength(browser_host) == 0) ) {
 839                                 if (browser_host == NULL) {
 840                                         browser_host = NewStrBuf();
 841                                         Put(HTTPHeaders, HKEY("FreeMeWithTheOtherHeaders"),
 842                                             browser_host, HFreeStrBuf);
 843                                 }
 844                                 locate_host(browser_host, WCC->http_sock);
 845                         }
 846                         if (WCC->serv_info == NULL)
 847                                 WCC->serv_info = get_serv_info(browser_host, user_agent);
 848                         if (WCC->serv_info == NULL){
 849                                 begin_burst();
 850                                 wprintf(_("Received unexpected answer from Citadel "
 851                                           "server; bailing out."));
 852                                 hprintf("HTTP/1.1 200 OK\r\n");
 853                                 hprintf("Content-type: text/plain; charset=utf-8\r\n");
 854                                 end_burst();
 855                                 end_webcit_session();
 856                                 goto SKIP_ALL_THIS_CRAP;
 857                         }
 858                         if (WCC->serv_info->serv_rev_level < MINIMUM_CIT_VERSION) {
 859                                 begin_burst();
 860                                 wprintf(_("You are connected to a Citadel "
 861                                         "server running Citadel %d.%02d. \n"
 862                                         "In order to run this version of WebCit "
 863                                         "you must also have Citadel %d.%02d or"
 864                                         " newer.\n\n\n"),
 865                                                 WCC->serv_info->serv_rev_level / 100,
 866                                                 WCC->serv_info->serv_rev_level % 100,
 867                                                 MINIMUM_CIT_VERSION / 100,
 868                                                 MINIMUM_CIT_VERSION % 100
 869                                         );
 870                                 hprintf("HTTP/1.1 200 OK\r\n");
 871                                 hprintf("Content-type: text/plain; charset=utf-8\r\n");
 872                                 end_burst();
 873                                 end_webcit_session();
 874                                 goto SKIP_ALL_THIS_CRAP;
 875                         }
 876                 }
 877         }
 878
 879         /*
 880          * Functions which can be performed without logging in
 881          */
 882         if (!strcasecmp(action, "listsub")) {
 883                 do_listsub();
 884                 goto SKIP_ALL_THIS_CRAP;
 885         }
 886         if (!strcasecmp(action, "freebusy")) {
 887                 do_freebusy(ChrPtr(ReqLine));
 888                 goto SKIP_ALL_THIS_CRAP;
 889         }
 890
 891         /*
 892          * If we're not logged in, but we have HTTP Authentication data,
 893          * try logging in to Citadel using that.
 894          */
 895         if ((!WCC->logged_in)
 896             && (StrLength(c_httpauth_user) > 0)
 897             && (StrLength(c_httpauth_pass) > 0))
 898         {
 899                 FlushStrBuf(Buf);
 900                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 901                 StrBuf_ServGetln(Buf);
 902                 if (GetServerStatus(Buf, NULL) == 3) {
 903                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 904                         StrBuf_ServGetln(Buf);
 905                         if (GetServerStatus(Buf, NULL) == 2) {
 906                                 become_logged_in(c_httpauth_user,
 907                                                 c_httpauth_pass, Buf);
 908                                 if (WCC->httpauth_user == NULL)
 909                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 910                                 else {
 911                                         FlushStrBuf(WCC->httpauth_user);
 912                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 913                                 }
 914                                 if (WCC->httpauth_pass == NULL)
 915                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 916                                 else {
 917                                         FlushStrBuf(WCC->httpauth_pass);
 918                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 919                                 }
 920                         } else {
 921                                 /* Should only display when password is wrong */
 922                                 authorization_required(&buf[4]);
 923                                 FreeStrBuf(&Buf);
 924                                 goto SKIP_ALL_THIS_CRAP;
 925                         }
 926                 }
 927         }
 928
 929         /* This needs to run early */
 930 #ifdef TECH_PREVIEW
 931         if (!strcasecmp(action, "rss")) {
 932                 display_rss(sbstr("room"), request_method);
 933                 goto SKIP_ALL_THIS_CRAP;
 934         }
 935 #endif
 936
 937         /*
 938          * The GroupDAV stuff relies on HTTP authentication instead of
 939          * our session's authentication.
 940          */
 941         if (!strncasecmp(action, "groupdav", 8)) {
 942                 groupdav_main(HTTPHeaders,
 943                               ReqLine, request_method,
 944                               ContentType, /* do GroupDAV methods */
 945                               ContentLength, content, body_start);
 946                 if (!WCC->logged_in) {
 947                         WCC->killthis = 1;      /* If not logged in, don't */
 948                 }                               /* keep the session active */
 949                 goto SKIP_ALL_THIS_CRAP;
 950         }
 951
 952
 953         /*
 954          * Automatically send requests with any method other than GET or
 955          * POST to the GroupDAV code as well.
 956          */
 957         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 958                 groupdav_main(HTTPHeaders, ReqLine,
 959                               request_method, ContentType, /** do GroupDAV methods */
 960                               ContentLength, content, body_start);
 961                 if (!WCC->logged_in) {
 962                         WCC->killthis = 1;      /** If not logged in, don't */
 963                 }                               /** keep the session active */
 964                 goto SKIP_ALL_THIS_CRAP;
 965         }
 966
 967         /*
 968          * If we're not logged in, but we have username and password cookies
 969          * supplied by the browser, try using them to log in.
 970          */
 971         if ((!WCC->logged_in)
 972            && (StrLength(c_username)>0)
 973            && (StrLength(c_password)>0)) {
 974                 serv_printf("USER %s", ChrPtr(c_username));
 975                 StrBuf_ServGetln(Buf);
 976                 if (GetServerStatus(Buf, NULL) == 3) {
 977                         serv_printf("PASS %s", ChrPtr(c_password));
 978                         StrBuf_ServGetln(Buf);
 979                         if (GetServerStatus(Buf, NULL) == 2) {
 980                                 become_logged_in(c_username, c_password, Buf);
 981                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 982                         }
 983                 }
 984         }
 985
 986         /*
 987          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 988          * prior to doing anything else.
 989          */
 990         if (havebstr("gotofirst")) {
 991                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 992         }
 993
 994         /*
 995          * If we don't have a current room, but a cookie specifying the
 996          * current room is supplied, make an effort to go there.
 997          */
 998         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 999                 serv_printf("GOTO %s", ChrPtr(c_roomname));
1000                 StrBuf_ServGetln(Buf);
1001                 if (GetServerStatus(Buf, NULL) == 2) {
1002                         if (WCC->wc_roomname == NULL) {
1003                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
1004                         }
1005                         else {
1006                                 FlushStrBuf(WCC->wc_roomname);
1007                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
1008                         }
1009                 }
1010         }
1011
1012         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1013                 Handler = (WebcitHandler*) vHandler;
1014         if (Handler != NULL) {
1015                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1016                         display_login(NULL);
1017                 }
1018                 else {
1019                         if((Handler->Flags & NEED_URL)) {
1020                                 if (WCC->UrlFragment1 == NULL)
1021                                         WCC->UrlFragment1 = NewStrBuf();
1022                                 if (WCC->UrlFragment2 == NULL)
1023                                         WCC->UrlFragment2 = NewStrBuf();
1024                                 if (WCC->UrlFragment3 == NULL)
1025                                         WCC->UrlFragment3 = NewStrBuf();
1026                                 if (WCC->UrlFragment4 == NULL)
1027                                         WCC->UrlFragment4 = NewStrBuf();
1028                                 StrBufPlain(WCC->UrlFragment1, index[0], -1);
1029                                 StrBufPlain(WCC->UrlFragment2, index[1], -1);
1030                                 StrBufPlain(WCC->UrlFragment3, index[2], -1);
1031                                 StrBufPlain(WCC->UrlFragment4, index[3], -1);
1032                         }
1033                         if ((Handler->Flags & AJAX) != 0)
1034                                 begin_ajax_response();
1035                         Handler->F();
1036                         if ((Handler->Flags & AJAX) != 0)
1037                                 end_ajax_response();
1038                 }
1039         }
1040         /* When all else fais, display the main menu. */
1041         else {
1042                 if (!WCC->logged_in)
1043                         display_login(NULL);
1044                 else
1045                         display_main_menu();
1046         }
1047
1048 SKIP_ALL_THIS_CRAP:
1049         if (WCC->SavePrefsToServer) {
1050                 save_preferences();
1051                 WCC->SavePrefsToServer = 0;
1052         }
1053         FreeStrBuf(&Buf);
1054         FreeStrBuf(&c_username);
1055         FreeStrBuf(&c_password);
1056         FreeStrBuf(&c_roomname);
1057         FreeStrBuf(&c_httpauth_user);
1058         FreeStrBuf(&c_httpauth_pass);
1059         FreeStrBuf(&WCC->this_page);
1060         fflush(stdout);
1061         if (content != NULL) {
1062                 FreeStrBuf(&content);
1063                 content = NULL;
1064         }
1065         DeleteHash(&WCC->urlstrings);
1066         if (WCC->upload_length > 0) {
1067                 free(WCC->upload);
1068                 WCC->upload_length = 0;
1069         }
1070         FreeStrBuf(&WCC->trailing_javascript);
1071         WCC->http_host = NULL;
1072
1073         /* How long did this transaction take? */
1074         gettimeofday(&tx_finish, NULL);
1075
1076         lprintf(9, "Transaction completed in %ld.%06ld seconds.\n",
1077                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
1078                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000
1079         );
1080 }
1081
1082
1083 /*
1084  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1085  */
1086 void sleeeeeeeeeep(int seconds)
1087 {
1088         struct timeval tv;
1089
1090         tv.tv_sec = seconds;
1091         tv.tv_usec = 0;
1092         select(0, NULL, NULL, NULL, &tv);
1093 }
1094
1095
1096 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1097 {
1098         wcsession *WCC = WC;
1099         if (WCC != NULL)
1100                 return (!IsEmptyStr(WCC->ImportantMessage));
1101         else
1102                 return 0;
1103 }
1104
1105 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1106 {
1107         wcsession *WCC = WC;
1108
1109         if (WCC != NULL) {
1110 /*
1111                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1112                                      WCC->ImportantMessage, 0);
1113 */
1114                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1115                 WCC->ImportantMessage[0] = '\0';
1116         }
1117 }
1118
1119 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1120 {
1121         wcsession *WCC = WC;
1122
1123         if (WCC != NULL)
1124                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1125 }
1126
1127 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1128 {
1129         extern StrBuf *csslocal;
1130         StrBufAppendBuf(Target,
1131                         csslocal, 0);
1132 }
1133
1134
1135
1136
1137 void
1138 InitModule_WEBCIT
1139 (void)
1140 {
1141         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1142         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1143         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1144         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1145
1146         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1147         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1148         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1149         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1150 }