webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22
  23 HashList *HandlerHash = NULL;
  24
  25 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31
  32         if (HandlerHash == NULL)
  33                 HandlerHash = NewHash(1, NULL);
  34
  35         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  36         NewHandler->F = F;
  37         NewHandler->Flags = Flags;
  38         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  39 }
  40
  41
  42 /*
  43  * web-printing funcion. uses our vsnprintf wrapper
  44  */
  45 void wprintf(const char *format,...)
  46 {
  47         wcsession *WCC = WC;
  48         va_list arg_ptr;
  49
  50         if (WCC->WBuf == NULL)
  51                 WCC->WBuf = NewStrBuf();
  52
  53         va_start(arg_ptr, format);
  54         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  55         va_end(arg_ptr);
  56 }
  57
  58 /*
  59  * http-header-printing funcion. uses our vsnprintf wrapper
  60  */
  61 void hprintf(const char *format,...)
  62 {
  63         wcsession *WCC = WC;
  64         va_list arg_ptr;
  65
  66         va_start(arg_ptr, format);
  67         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  68         va_end(arg_ptr);
  69 }
  70
  71
  72
  73 /*
  74  * wrap up an HTTP session, closes tags, etc.
  75  *
  76  * print_standard_html_footer should be set to:
  77  * 0            - to transmit only,
  78  * nonzero      - to append the closing tags
  79  */
  80 void wDumpContent(int print_standard_html_footer)
  81 {
  82         if (print_standard_html_footer) {
  83                 wprintf("</div> <!-- end of 'content' div -->\n");
  84                 do_template("trailing", NULL);
  85         }
  86
  87         /* If we've been saving it all up for one big output burst,
  88          * go ahead and do that now.
  89          */
  90         end_burst();
  91 }
  92
  93
  94
  95
  96 /*
  97  * Output HTTP headers and leading HTML for a page
  98  */
  99 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 100                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 101
 102                         int do_room_banner,     /* 0=no, 1=yes,
 103                                                  * 2 = I'm going to embed my own, so don't open the
 104                                                  *     <div id="content"> either.
 105                                                  */
 106
 107                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 108                         int suppress_check,     /* 1 = suppress check for instant messages          */
 109                         int cache               /* 1 = allow browser to cache this page             */
 110 ) {
 111         char cookie[1024];
 112         char httpnow[128];
 113
 114         hprintf("HTTP/1.1 200 OK\n");
 115         http_datestring(httpnow, sizeof httpnow, time(NULL));
 116
 117         if (do_httpheaders) {
 118                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 119                         "Server: %s / %s\n"
 120                         "Connection: close\r\n",
 121                         PACKAGE_STRING,
 122                         ChrPtr(serv_info.serv_software)
 123                 );
 124         }
 125
 126         if (cache) {
 127                 char httpTomorow[128];
 128
 129                 http_datestring(httpTomorow, sizeof httpTomorow,
 130                                 time(NULL) + 60 * 60 * 24 * 2);
 131
 132                 hprintf("Pragma: public\r\n"
 133                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 134                         "Last-modified: %s\r\n"
 135                         "Expires: %s\r\n",
 136                         httpnow,
 137                         httpTomorow
 138                 );
 139         }
 140         else {
 141                 hprintf("Pragma: no-cache\r\n"
 142                         "Cache-Control: no-store\r\n"
 143                         "Expires: -1\r\n"
 144                 );
 145         }
 146
 147         stuff_to_cookie(cookie, 1024,
 148                         WC->wc_session, WC->wc_username,
 149                         WC->wc_password, WC->wc_roomname);
 150
 151         if (unset_cookies) {
 152                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 153         } else {
 154                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 155                 if (server_cookie != NULL) {
 156                         hprintf("%s\n", server_cookie);
 157                 }
 158         }
 159
 160         if (do_htmlhead) {
 161                 begin_burst();
 162                 do_template("head", NULL);
 163
 164                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 165                 if (!IsEmptyStr(WC->ImportantMessage)) {
 166                         wprintf("<div id=\"important_message\">\n"
 167                                 "<span class=\"imsg\">");
 168                         escputs(WC->ImportantMessage);
 169                         wprintf("</span><br />\n"
 170                                 "</div>\n"
 171                         );
 172                         StrBufAppendPrintf(WC->trailing_javascript,
 173                                 "setTimeout('hide_imsg_popup()', 5000); \n"
 174                         );
 175                         WC->ImportantMessage[0] = 0;
 176                 }
 177
 178                 if ( (WC->logged_in) && (!unset_cookies) ) {
 179                   //DoTemplate(HKEY("iconbar"), NULL, &NoCtx);
 180                         page_popup();
 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 void output_custom_content_header(const char *ctype) {
 196   hprintf("HTTP/1.1 200 OK\r\n");
 197   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 198   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(serv_info.serv_software));
 199   hprintf("Connection: close\r\n");
 200 }
 201
 202
 203 /*
 204  * Generic function to do an HTTP redirect.  Easy and fun.
 205  */
 206 void http_redirect(const char *whichpage) {
 207         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 208         hprintf("Location: %s\r\n", whichpage);
 209         hprintf("URI: %s\r\n", whichpage);
 210         hprintf("Content-type: text/html; charset=utf-8\r\n");
 211         wprintf("<html><body>");
 212         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 213         wprintf("</body></html>\n");
 214         end_burst();
 215 }
 216
 217
 218
 219 /*
 220  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 221  */
 222 void http_transmit_thing(const char *content_type,
 223                          int is_static) {
 224
 225 #ifndef TECH_PREVIEW
 226         lprintf(9, "http_transmit_thing(%s)%s\n",
 227                 content_type,
 228                 (is_static ? " (static)" : "")
 229         );
 230 #endif
 231         output_headers(0, 0, 0, 0, 0, is_static);
 232
 233         hprintf("Content-type: %s\r\n"
 234                 "Server: %s\r\n"
 235                 "Connection: close\r\n",
 236                 content_type,
 237                 PACKAGE_STRING);
 238
 239         end_burst();
 240 }
 241
 242 /*
 243  * print menu box like used in the floor view or admin interface.
 244  * This function takes pair of strings as va_args,
 245  * Title        Title string of the box
 246  * Class        CSS Class for the box
 247  * nLines       How many string pairs should we print? (URL, UrlText)
 248  * ...          Pairs of URL Strings and their Names
 249  */
 250 void print_menu_box(char* Title, char *Class, int nLines, ...)
 251 {
 252         va_list arg_list;
 253         long i;
 254
 255         svput("BOXTITLE", WCS_STRING, Title);
 256         do_template("beginboxx", NULL);
 257
 258         wprintf("<ul class=\"%s\">", Class);
 259
 260         va_start(arg_list, nLines);
 261         for (i = 0; i < nLines; ++i)
 262         {
 263                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 264                 wprintf((char *) va_arg(arg_list, char *));
 265                 wprintf("</a></li>\n");
 266         }
 267         va_end (arg_list);
 268
 269         wprintf("</a></li>\n");
 270
 271         wprintf("</ul>");
 272
 273         do_template("endbox", NULL);
 274 }
 275
 276
 277 /*
 278  * dump out static pages from disk
 279  */
 280 void output_static(char *what)
 281 {
 282         int fd;
 283         struct stat statbuf;
 284         off_t bytes;
 285         off_t count = 0;
 286         const char *content_type;
 287         int len;
 288         const char *Err;
 289
 290         fd = open(what, O_RDONLY);
 291         if (fd <= 0) {
 292                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 293                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 294                 hprintf("Content-Type: text/plain\r\n");
 295                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 296                 end_burst();
 297         } else {
 298                 len = strlen (what);
 299                 content_type = GuessMimeByFilename(what, len);
 300
 301                 if (fstat(fd, &statbuf) == -1) {
 302                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 303                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 304                         hprintf("Content-Type: text/plain\r\n");
 305                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 306                         end_burst();
 307                         return;
 308                 }
 309
 310                 count = 0;
 311                 bytes = statbuf.st_size;
 312
 313                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 314                 {
 315                         if (fd > 0) close(fd);
 316                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 317                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 318                                 hprintf("Content-Type: text/plain\r\n");
 319                                 end_burst();
 320                                 return;
 321                 }
 322
 323
 324                 close(fd);
 325 #ifndef TECH_PREVIEW
 326                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 327 #endif
 328                 http_transmit_thing(content_type, 1);
 329         }
 330         if (yesbstr("force_close_session")) {
 331                 end_webcit_session();
 332         }
 333 }
 334
 335
 336 /*
 337  * Convenience functions to display a page containing only a string
 338  *
 339  * titlebarcolor        color of the titlebar of the frame
 340  * titlebarmsg          text to display in the title bar
 341  * messagetext          body of the box
 342  */
 343 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 344 {
 345         hprintf("HTTP/1.1 200 OK\n");
 346         output_headers(1, 1, 2, 0, 0, 0);
 347         wprintf("<div id=\"banner\">\n");
 348         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 349         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 350         wprintf("</td></tr></table>\n");
 351         wprintf("</div>\n<div id=\"content\">\n");
 352         escputs(messagetext);
 353
 354         wprintf("<hr />\n");
 355         wDumpContent(1);
 356 }
 357
 358
 359 /*
 360  * Display a blank page.
 361  */
 362 void blank_page(void) {
 363         output_headers(1, 1, 0, 0, 0, 0);
 364         wDumpContent(2);
 365 }
 366
 367
 368 /*
 369  * A template has been requested
 370  */
 371 void url_do_template(void) {
 372         const StrBuf *MimeType;
 373         const StrBuf *Tmpl = sbstr("template");
 374         begin_burst();
 375         output_headers(0, 0, 0, 0, 1, 0);
 376         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 377         http_transmit_thing(ChrPtr(MimeType), 0);
 378 }
 379
 380
 381
 382 /*
 383  * convenience function to indicate success
 384  */
 385 void display_success(char *successmessage)
 386 {
 387         convenience_page("007700", "OK", successmessage);
 388 }
 389
 390
 391 /*
 392  * Authorization required page
 393  * This is probably temporary and should be revisited
 394  */
 395 void authorization_required(const char *message)
 396 {
 397         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 398         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(serv_info.serv_humannode));
 399         hprintf("Content-Type: text/html\r\n");
 400         wprintf("<h1>");
 401         wprintf(_("Authorization Required"));
 402         wprintf("</h1>\r\n");
 403         wprintf(_("The resource you requested requires a valid username and password. "
 404                 "You could not be logged in: %s\n"), message);
 405         wDumpContent(0);
 406
 407 }
 408
 409 /*
 410  * Convenience functions to wrap around asynchronous ajax responses
 411  */
 412 void begin_ajax_response(void) {
 413         wcsession *WCC = WC;
 414
 415         FlushStrBuf(WCC->HBuf);
 416         output_headers(0, 0, 0, 0, 0, 0);
 417
 418         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 419                 "Server: %s\r\n"
 420                 "Connection: close\r\n"
 421                 ,
 422                 PACKAGE_STRING);
 423         begin_burst();
 424 }
 425
 426 /*
 427  * print ajax response footer
 428  */
 429 void end_ajax_response(void) {
 430         wDumpContent(0);
 431 }
 432
 433 /*
 434  * Wraps a Citadel server command in an AJAX transaction.
 435  */
 436 void ajax_servcmd(void)
 437 {
 438         char buf[1024];
 439         char gcontent[1024];
 440         char *junk;
 441         size_t len;
 442
 443         begin_ajax_response();
 444
 445         serv_printf("%s", bstr("g_cmd"));
 446         serv_getln(buf, sizeof buf);
 447         wprintf("%s\n", buf);
 448
 449         if (buf[0] == '8') {
 450                 serv_printf("\n\n000");
 451         }
 452         if ((buf[0] == '1') || (buf[0] == '8')) {
 453                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 454                         wprintf("%s\n", gcontent);
 455                 }
 456                 wprintf("000");
 457         }
 458         if (buf[0] == '4') {
 459                 text_to_server(bstr("g_input"));
 460                 serv_puts("000");
 461         }
 462         if (buf[0] == '6') {
 463                 len = atol(&buf[4]);
 464                 junk = malloc(len);
 465                 serv_read(junk, len);
 466                 free(junk);
 467         }
 468         if (buf[0] == '7') {
 469                 len = atol(&buf[4]);
 470                 junk = malloc(len);
 471                 memset(junk, 0, len);
 472                 serv_write(junk, len);
 473                 free(junk);
 474         }
 475
 476         end_ajax_response();
 477
 478         /*
 479          * This is kind of an ugly hack, but this is the only place it can go.
 480          * If the command was GEXP, then the instant messenger window must be
 481          * running, so reset the "last_pager_check" watchdog timer so
 482          * that page_popup() doesn't try to open it a second time.
 483          */
 484         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 485                 WC->last_pager_check = time(NULL);
 486         }
 487 }
 488
 489
 490 /*
 491  * Helper function for the asynchronous check to see if we need
 492  * to open the instant messenger window.
 493  */
 494 void seconds_since_last_gexp(void)
 495 {
 496         char buf[256];
 497
 498         if ( (time(NULL) - WC->last_pager_check) < 30) {
 499                 wprintf("NO\n");
 500         }
 501         else {
 502                 memset(buf, 0, 5);
 503                 serv_puts("NOOP");
 504                 serv_getln(buf, sizeof buf);
 505                 if (buf[3] == '*') {
 506                         wprintf("YES");
 507                 }
 508                 else {
 509                         wprintf("NO");
 510                 }
 511         }
 512 }
 513
 514 /**
 515  * \brief Detects a 'mobile' user agent
 516  */
 517 int is_mobile_ua(char *user_agent) {
 518       if (strstr(user_agent,"iPhone OS") != NULL) {
 519         return 1;
 520       } else if (strstr(user_agent,"Windows CE") != NULL) {
 521         return 1;
 522       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 523         return 1;
 524       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 525         return 1;
 526       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 527               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 528           return 1;
 529           }
 530       return 0;
 531 }
 532
 533
 534 /*
 535  * Entry point for WebCit transaction
 536  */
 537 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
 538 {
 539         StrBuf *Buf;
 540         const char *pch, *pchs, *pche;
 541         void *vLine;
 542         char action[1024];
 543         char arg[8][128];
 544         size_t sizes[10];
 545         char *index[10];
 546         char buf[SIZ];
 547         int a, nBackDots, nEmpty;
 548         int ContentLength = 0;
 549         StrBuf *ContentType = NULL;
 550         StrBuf *UrlLine = NULL;
 551         StrBuf *content = NULL;
 552         const char *content_end = NULL;
 553         StrBuf *browser_host = NULL;
 554         char user_agent[256];
 555         int body_start = 0;
 556         int is_static = 0;
 557         int n_static = 0;
 558         int len = 0;
 559         void *vHandler;
 560         WebcitHandler *Handler;
 561
 562         /*
 563          * We stuff these with the values coming from the client cookies,
 564          * so we can use them to reconnect a timed out session if we have to.
 565          */
 566         StrBuf *c_username;
 567         StrBuf *c_password;
 568         StrBuf *c_roomname;
 569         char c_httpauth_string[SIZ];
 570         StrBuf *c_httpauth_user;
 571         StrBuf *c_httpauth_pass;
 572         wcsession *WCC;
 573
 574         Buf = NewStrBuf();
 575         c_username = NewStrBuf();
 576         c_password = NewStrBuf();
 577         c_roomname = NewStrBuf();
 578         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 579         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 580         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 581
 582         WCC= WC;
 583         if (WCC->WBuf == NULL)
 584                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 585         FlushStrBuf(WCC->WBuf);
 586
 587         if (WCC->HBuf == NULL)
 588                 WCC->HBuf = NewStrBuf();
 589         FlushStrBuf(WCC->HBuf);
 590
 591         WCC->upload_length = 0;
 592         WCC->upload = NULL;
 593         WCC->is_mobile = 0;
 594         WCC->trailing_javascript = NewStrBuf();
 595         WCC->nWildfireHeaders = 0;
 596
 597         /** Figure out the action */
 598         index[0] = action;
 599         sizes[0] = sizeof action;
 600         for (a=1; a<9; a++)
 601         {
 602                 index[a] = arg[a-1];
 603                 sizes[a] = sizeof arg[a-1];
 604         }
 605 /*///   index[9] = &foo; todo */
 606         nBackDots = 0;
 607         nEmpty = 0;
 608         for ( a = 0; a < 9; ++a)
 609         {
 610                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 611                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 612                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 613                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 614                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 615                         nBackDots++;
 616                 if (index[a][0] == '\0')
 617                         nEmpty++;
 618         }
 619
 620
 621         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 622             (vLine != NULL)){
 623                 cookie_to_stuff((StrBuf *)vLine, NULL,
 624                                 c_username,
 625                                 c_password,
 626                                 c_roomname);
 627         }
 628         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 629             (vLine!=NULL)) {
 630 /* TODO: wrap base64 in strbuf */
 631                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
 632                 FlushStrBuf(Buf);
 633                 StrBufAppendBufPlain(Buf, c_httpauth_string, -1, 0);
 634                 StrBufExtract_token(c_httpauth_user, Buf, 0, ':');
 635                 StrBufExtract_token(c_httpauth_pass, Buf, 1, ':');
 636         }
 637         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 638             (vLine!=NULL)) {
 639                 ContentLength = StrToi((StrBuf*)vLine);
 640         }
 641         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 642             (vLine!=NULL)) {
 643                 ContentType = (StrBuf*)vLine;
 644         }
 645         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 646             (vLine!=NULL)) {
 647                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 648 #ifdef TECH_PREVIEW
 649                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 650                         WCC->is_mobile = 1;
 651                 }
 652                 else {
 653                         WCC->is_mobile = 0;
 654                 }
 655 #endif
 656         }
 657         if ((follow_xff) &&
 658             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 659             (vLine != NULL)) {
 660                 WCC->http_host = (StrBuf*)vLine;
 661         }
 662         if ((StrLength(WCC->http_host) == 0) &&
 663             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 664             (vLine!=NULL)) {
 665                 WCC->http_host = (StrBuf*)vLine;
 666         }
 667
 668         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 669             (vLine!=NULL)) {
 670                 browser_host = (StrBuf*) vLine;
 671
 672                 while (StrBufNum_tokens(browser_host, ',') > 1) {
 673                         StrBufRemove_token(browser_host, 0, ',');
 674                 }
 675                 StrBufTrim(browser_host);
 676         }
 677
 678         if (ContentLength > 0) {
 679                 content = NewStrBuf();
 680                 StrBufPrintf(content, "Content-type: %s\n"
 681                          "Content-length: %d\n\n",
 682                          ChrPtr(ContentType), ContentLength);
 683 /*
 684                 hprintf("Content-type: %s\n"
 685                         "Content-length: %d\n\n",
 686                         ContentType, ContentLength);
 687 */
 688                 body_start = StrLength(content);
 689
 690                 /** Read the entire input data at once. */
 691                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
 692
 693                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 694                         StrBufCutLeft(content, body_start);
 695                         ParseURLParams(content);
 696                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 697                         content_end = ChrPtr(content) + ContentLength + body_start;
 698                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 699                 }
 700         } else {
 701                 content = NULL;
 702         }
 703
 704         /* make a note of where we are in case the user wants to save it */
 705         WCC->this_page = NewStrBufDup(ReqLine);
 706         StrBufRemove_token(WCC->this_page, 2, ' ');
 707         StrBufRemove_token(WCC->this_page, 0, ' ');
 708
 709         /* If there are variables in the URL, we must grab them now */
 710         UrlLine = NewStrBufDup(ReqLine);
 711         len = StrLength(UrlLine);
 712         pch = pchs = ChrPtr(UrlLine);
 713         pche = pchs + len;
 714         while (pch < pche) {
 715                 if ((*pch == '?') || (*pch == '&')) {
 716                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 717                         ParseURLParams(UrlLine);
 718                         break;
 719                 }
 720                 pch ++;
 721         }
 722         FreeStrBuf(&UrlLine);
 723
 724         /* If it's a "force 404" situation then display the error and bail. */
 725         if (!strcmp(action, "404")) {
 726                 hprintf("HTTP/1.1 404 Not found\r\n");
 727                 hprintf("Content-Type: text/plain\r\n");
 728                 wprintf("Not found\r\n");
 729                 end_burst();
 730                 goto SKIP_ALL_THIS_CRAP;
 731         }
 732
 733         /* Static content can be sent without connecting to Citadel. */
 734         is_static = 0;
 735         for (a=0; a<ndirs && ! is_static; ++a) {
 736                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 737                         is_static = 1;
 738                         n_static = a;
 739                 }
 740         }
 741         if (is_static) {
 742                 if (nBackDots < 2)
 743                 {
 744                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 745                                  static_dirs[n_static],
 746                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 747                         for (a=0; a<8; ++a) {
 748                                 if (buf[strlen(buf)-1] == '/') {
 749                                         buf[strlen(buf)-1] = 0;
 750                                 }
 751                         }
 752                         for (a = 0; a < strlen(buf); ++a) {
 753                                 if (isspace(buf[a])) {
 754                                         buf[a] = 0;
 755                                 }
 756                         }
 757                         output_static(buf);
 758                 }
 759                 else
 760                 {
 761                         lprintf(9, "Suspicious request. Ignoring.");
 762                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 763                         hprintf("Content-Type: text/plain\r\n\r\n");
 764                         wprintf("You have sent a malformed or invalid request.\r\n");
 765                         end_burst();
 766                 }
 767                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 768         }
 769
 770         /* If the client sent a nonce that is incorrect, kill the request. */
 771         if (strlen(bstr("nonce")) > 0) {
 772                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 773                         bstr("nonce"), WCC->nonce);
 774                 if (ibstr("nonce") != WCC->nonce) {
 775                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 776                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 777                         hprintf("Content-Type: text/plain\r\n\r\n");
 778                         wprintf("Security check failed.\r\n");
 779                         end_burst();
 780                         goto SKIP_ALL_THIS_CRAP;
 781                 }
 782         }
 783
 784         /*
 785          * If we're not connected to a Citadel server, try to hook up the
 786          * connection now.
 787          */
 788         if (!WCC->connected) {
 789                 if (!strcasecmp(ctdlhost, "uds")) {
 790                         /* unix domain socket */
 791                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 792                         WCC->serv_sock = uds_connectsock(buf);
 793                 }
 794                 else {
 795                         /* tcp socket */
 796                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 797                 }
 798
 799                 if (WCC->serv_sock < 0) {
 800                         do_logout();
 801                         goto SKIP_ALL_THIS_CRAP;
 802                 }
 803                 else {
 804                         WCC->connected = 1;
 805                         serv_getln(buf, sizeof buf);    /* get the server greeting */
 806
 807                         /* Are there too many users already logged in? */
 808                         if (!strncmp(buf, "571", 3)) {
 809                                 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."));
 810                                 end_burst();
 811                                 end_webcit_session();
 812                                 goto SKIP_ALL_THIS_CRAP;
 813                         }
 814
 815                         /*
 816                          * From what host is our user connecting?  Go with
 817                          * the host at the other end of the HTTP socket,
 818                          * unless we are following X-Forwarded-For: headers
 819                          * and such a header has already turned up something.
 820                          */
 821                         if ( (!follow_xff) || (StrLength(browser_host) == 0) ) {
 822                                 if (browser_host == NULL) {
 823                                         browser_host = NewStrBuf();
 824                                         Put(HTTPHeaders, HKEY("FreeMeWithTheOtherHeaders"),
 825                                             browser_host, HFreeStrBuf);
 826                                 }
 827                                 locate_host(browser_host, WCC->http_sock);
 828                         }
 829
 830                         get_serv_info(browser_host, user_agent);
 831                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 832                                 begin_burst();
 833                                 wprintf(_("You are connected to a Citadel "
 834                                         "server running Citadel %d.%02d. \n"
 835                                         "In order to run this version of WebCit "
 836                                         "you must also have Citadel %d.%02d or"
 837                                         " newer.\n\n\n"),
 838                                                 serv_info.serv_rev_level / 100,
 839                                                 serv_info.serv_rev_level % 100,
 840                                                 MINIMUM_CIT_VERSION / 100,
 841                                                 MINIMUM_CIT_VERSION % 100
 842                                         );
 843                                 end_burst();
 844                                 end_webcit_session();
 845                                 goto SKIP_ALL_THIS_CRAP;
 846                         }
 847                 }
 848         }
 849 /*///////todo: restore language in this case */
 850         /*
 851          * Functions which can be performed without logging in
 852          */
 853         if (!strcasecmp(action, "listsub")) {
 854                 do_listsub();
 855                 goto SKIP_ALL_THIS_CRAP;
 856         }
 857         if (!strcasecmp(action, "freebusy")) {
 858                 do_freebusy(ChrPtr(ReqLine));
 859                 goto SKIP_ALL_THIS_CRAP;
 860         }
 861
 862         /*
 863          * If we're not logged in, but we have HTTP Authentication data,
 864          * try logging in to Citadel using that.
 865          */
 866         if ((!WCC->logged_in)
 867             && (StrLength(c_httpauth_user) > 0)
 868             && (StrLength(c_httpauth_pass) > 0))
 869         {
 870                 FlushStrBuf(Buf);
 871                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 872                 StrBuf_ServGetln(Buf);
 873                 if (GetServerStatus(Buf, NULL) == 3) {
 874                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 875                         StrBuf_ServGetln(Buf);
 876                         if (GetServerStatus(Buf, NULL) == 2) {
 877                                 become_logged_in(c_httpauth_user,
 878                                                 c_httpauth_pass, Buf);
 879                                 if (WCC->httpauth_user == NULL)
 880                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 881                                 else {
 882                                         FlushStrBuf(WCC->httpauth_user);
 883                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 884                                 }
 885                                 if (WCC->httpauth_pass == NULL)
 886                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 887                                 else {
 888                                         FlushStrBuf(WCC->httpauth_pass);
 889                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 890                                 }
 891                         } else {
 892                                 /* Should only display when password is wrong */
 893                                 authorization_required(&buf[4]);
 894                                 FreeStrBuf(&Buf);
 895                                 goto SKIP_ALL_THIS_CRAP;
 896                         }
 897                 }
 898         }
 899
 900         /* This needs to run early */
 901 #ifdef TECH_PREVIEW
 902         if (!strcasecmp(action, "rss")) {
 903                 display_rss(sbstr("room"), request_method);
 904                 goto SKIP_ALL_THIS_CRAP;
 905         }
 906 #endif
 907
 908         /*
 909          * The GroupDAV stuff relies on HTTP authentication instead of
 910          * our session's authentication.
 911          */
 912         if (!strncasecmp(action, "groupdav", 8)) {
 913                 groupdav_main(HTTPHeaders,
 914                               ReqLine, request_method,
 915                               ContentType, /* do GroupDAV methods */
 916                               ContentLength, content, body_start);
 917                 if (!WCC->logged_in) {
 918                         WCC->killthis = 1;      /* If not logged in, don't */
 919                 }                               /* keep the session active */
 920                 goto SKIP_ALL_THIS_CRAP;
 921         }
 922
 923
 924         /*
 925          * Automatically send requests with any method other than GET or
 926          * POST to the GroupDAV code as well.
 927          */
 928         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 929                 groupdav_main(HTTPHeaders, ReqLine,
 930                               request_method, ContentType, /** do GroupDAV methods */
 931                               ContentLength, content, body_start);
 932                 if (!WCC->logged_in) {
 933                         WCC->killthis = 1;      /** If not logged in, don't */
 934                 }                               /** keep the session active */
 935                 goto SKIP_ALL_THIS_CRAP;
 936         }
 937
 938         /*
 939          * If we're not logged in, but we have username and password cookies
 940          * supplied by the browser, try using them to log in.
 941          */
 942         if ((!WCC->logged_in)
 943            && (StrLength(c_username)>0)
 944            && (StrLength(c_password)>0)) {
 945                 serv_printf("USER %s", ChrPtr(c_username));
 946                 StrBuf_ServGetln(Buf);
 947                 if (GetServerStatus(Buf, NULL) == 3) {
 948                         serv_printf("PASS %s", ChrPtr(c_password));
 949                         StrBuf_ServGetln(Buf);
 950                         if (GetServerStatus(Buf, NULL) == 2) {
 951                                 StrBuf *Lang;
 952                                 become_logged_in(c_username, c_password, Buf);
 953                                 if (get_preference("language", &Lang)) {
 954                                         set_selected_language(ChrPtr(Lang));
 955                                         go_selected_language();         /* set locale */
 956                                 }
 957                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 958                         }
 959                 }
 960         }
 961
 962         /*
 963          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 964          * prior to doing anything else.
 965          */
 966         if (havebstr("gotofirst")) {
 967                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 968         }
 969
 970         /*
 971          * If we don't have a current room, but a cookie specifying the
 972          * current room is supplied, make an effort to go there.
 973          */
 974         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 975                 serv_printf("GOTO %s", ChrPtr(c_roomname));
 976                 StrBuf_ServGetln(Buf);
 977                 if (GetServerStatus(Buf, NULL) == 2) {
 978                         if (WCC->wc_roomname == NULL) {
 979                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
 980                         }
 981                         else {
 982                                 FlushStrBuf(WCC->wc_roomname);
 983                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
 984                         }
 985                 }
 986         }
 987
 988         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 989                 Handler = (WebcitHandler*) vHandler;
 990         if (Handler != NULL) {
 991                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 992                         display_login(NULL);
 993                 }
 994                 else {
 995                         if((Handler->Flags & NEED_URL)) {
 996                                 if (WCC->UrlFragment1 == NULL)
 997                                         WCC->UrlFragment1 = NewStrBuf();
 998                                 if (WCC->UrlFragment2 == NULL)
 999                                         WCC->UrlFragment2 = NewStrBuf();
1000                                 if (WCC->UrlFragment3 == NULL)
1001                                         WCC->UrlFragment3 = NewStrBuf();
1002                                 StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
1003                                 StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
1004                                 StrBufPrintf(WCC->UrlFragment3, "%s", index[2]);
1005                         }
1006                         if ((Handler->Flags & AJAX) != 0)
1007                                 begin_ajax_response();
1008                         Handler->F();
1009                         if ((Handler->Flags & AJAX) != 0)
1010                                 end_ajax_response();
1011                 }
1012         }
1013         /* When all else fais, display the main menu. */
1014         else {
1015                 if (!WCC->logged_in)
1016                         display_login(NULL);
1017                 else
1018                         display_main_menu();
1019         }
1020
1021 SKIP_ALL_THIS_CRAP:
1022         if (WCC->SavePrefsToServer) {
1023                 save_preferences();
1024                 WCC->SavePrefsToServer = 0;
1025         }
1026         FreeStrBuf(&Buf);
1027         FreeStrBuf(&c_username);
1028         FreeStrBuf(&c_password);
1029         FreeStrBuf(&c_roomname);
1030         FreeStrBuf(&c_httpauth_user);
1031         FreeStrBuf(&c_httpauth_pass);
1032         FreeStrBuf(&WCC->this_page);
1033         fflush(stdout);
1034         if (content != NULL) {
1035                 FreeStrBuf(&content);
1036                 content = NULL;
1037         }
1038         DeleteHash(&WCC->urlstrings);
1039         if (WCC->upload_length > 0) {
1040                 free(WCC->upload);
1041                 WCC->upload_length = 0;
1042         }
1043         FreeStrBuf(&WCC->trailing_javascript);
1044         WCC->http_host = NULL;
1045 }
1046
1047
1048 /*
1049  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1050  */
1051 void sleeeeeeeeeep(int seconds)
1052 {
1053         struct timeval tv;
1054
1055         tv.tv_sec = seconds;
1056         tv.tv_usec = 0;
1057         select(0, NULL, NULL, NULL, &tv);
1058 }
1059
1060
1061 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1062 {
1063         wcsession *WCC = WC;
1064         if (WCC != NULL)
1065                 return (!IsEmptyStr(WCC->ImportantMessage));
1066         else
1067                 return 0;
1068 }
1069
1070 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1071 {
1072         wcsession *WCC = WC;
1073
1074         if (WCC != NULL) {
1075 /*
1076                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1077                                      WCC->ImportantMessage, 0);
1078 */
1079                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1080                 WCC->ImportantMessage[0] = '\0';
1081         }
1082 }
1083
1084 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1085 {
1086         wcsession *WCC = WC;
1087
1088         if (WCC != NULL)
1089                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1090 }
1091
1092 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1093 {
1094         extern StrBuf *csslocal;
1095         StrBufAppendBuf(Target,
1096                         csslocal, 0);
1097 }
1098
1099
1100
1101
1102 void
1103 InitModule_WEBCIT
1104 (void)
1105 {
1106         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1107         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1108         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1109         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1110
1111         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1112         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1113         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1114         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1115 }