webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  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  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32 #include "webserver.h"
  33 #include "mime_parser.h"
  34
  35 /*
  36  * String to unset the cookie.
  37  * Any date "in the past" will work, so I chose my birthday, right down to
  38  * the exact minute.  :)
  39  */
  40 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  41
  42 void unescape_input(char *buf)
  43 {
  44         int a, b;
  45         char hex[3];
  46
  47         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  48                 buf[strlen(buf) - 1] = 0;
  49
  50         for (a = 0; a < strlen(buf); ++a) {
  51                 if (buf[a] == '+')
  52                         buf[a] = ' ';
  53                 if (buf[a] == '%') {
  54                         hex[0] = buf[a + 1];
  55                         hex[1] = buf[a + 2];
  56                         hex[2] = 0;
  57                         sscanf(hex, "%02x", &b);
  58                         buf[a] = (char) b;
  59                         strcpy(&buf[a + 1], &buf[a + 3]);
  60                 }
  61         }
  62
  63 }
  64
  65
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (strlen(up) > 0) {
  75
  76                 /* locate the = sign */
  77                 safestrncpy(buf, up, sizeof buf);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 strcpy(u->url_key, buf);
  90
  91                 /* now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /* locate "&" and "?" delimiters */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up;
 106                 for (a = 0; a < b; ++a)
 107                         ++ptr;
 108                 strcpy(ptr, "");
 109
 110                 u->url_data = malloc(strlen(up) + 1);
 111                 strcpy(u->url_data, up);
 112                 u->url_data[b] = 0;
 113                 unescape_input(u->url_data);
 114                 up = ptr;
 115                 ++up;
 116         }
 117 }
 118
 119 void free_urls(void)
 120 {
 121         struct urlcontent *u;
 122
 123         while (WC->urlstrings != NULL) {
 124                 free(WC->urlstrings->url_data);
 125                 u = WC->urlstrings->next;
 126                 free(WC->urlstrings);
 127                 WC->urlstrings = u;
 128         }
 129 }
 130
 131 /*
 132  * Diagnostic function to display the contents of all variables
 133  */
 134 void dump_vars(void)
 135 {
 136         struct urlcontent *u;
 137
 138         for (u = WC->urlstrings; u != NULL; u = u->next) {
 139                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 140         }
 141 }
 142
 143 char *bstr(char *key)
 144 {
 145         struct urlcontent *u;
 146
 147         for (u = WC->urlstrings; u != NULL; u = u->next) {
 148                 if (!strcasecmp(u->url_key, key))
 149                         return (u->url_data);
 150         }
 151         return ("");
 152 }
 153
 154
 155 void wprintf(const char *format,...)
 156 {
 157         va_list arg_ptr;
 158         char wbuf[4096];
 159
 160         va_start(arg_ptr, format);
 161         vsprintf(wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         write(WC->http_sock, wbuf, strlen(wbuf));
 165 }
 166
 167
 168 /*
 169  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 170  *
 171  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 172  * append the main menu and closing tags, or 2 to
 173  * append the closing tags only.
 174  */
 175 void wDumpContent(int print_standard_html_footer)
 176 {
 177         if (print_standard_html_footer) {
 178                 do_template("trailing");
 179         }
 180
 181
 182 }
 183
 184
 185 /*
 186  * Copy a string, escaping characters which have meaning in HTML.  If
 187  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 188  */
 189 void stresc(char *target, char *strbuf, int nbsp)
 190 {
 191         int a;
 192         strcpy(target, "");
 193
 194         for (a = 0; a < strlen(strbuf); ++a) {
 195                 if (strbuf[a] == '<')
 196                         strcat(target, "&lt;");
 197                 else if (strbuf[a] == '>')
 198                         strcat(target, "&gt;");
 199                 else if (strbuf[a] == '&')
 200                         strcat(target, "&amp;");
 201                 else if (strbuf[a] == '\"')
 202                         strcat(target, "&quot;");
 203                 else if (strbuf[a] == '\'')
 204                         strcat(target, "&#39;");
 205                 else if (strbuf[a] == LB)
 206                         strcat(target, "<");
 207                 else if (strbuf[a] == RB)
 208                         strcat(target, ">");
 209                 else if (strbuf[a] == QU)
 210                         strcat(target, "\"");
 211                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 212                         strcat(target, "&nbsp;");
 213                 } else {
 214                         strncat(target, &strbuf[a], 1);
 215                 }
 216         }
 217 }
 218
 219 void escputs1(char *strbuf, int nbsp)
 220 {
 221         char buf[1024];
 222         stresc(buf, strbuf, nbsp);
 223         wprintf("%s", buf);
 224 }
 225
 226 void escputs(char *strbuf)
 227 {
 228         escputs1(strbuf, 0);
 229 }
 230
 231 /*
 232  * Escape a string for feeding out as a URL.
 233  * Returns a pointer to a buffer that must be freed by the caller!
 234  */
 235 void urlesc(char *outbuf, char *strbuf)
 236 {
 237         int a, b, c;
 238         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 239
 240         strcpy(outbuf, "");
 241
 242         for (a = 0; a < strlen(strbuf); ++a) {
 243                 c = 0;
 244                 for (b = 0; b < strlen(ec); ++b) {
 245                         if (strbuf[a] == ec[b])
 246                                 c = 1;
 247                 }
 248                 b = strlen(outbuf);
 249                 if (c == 1)
 250                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 251                 else
 252                         sprintf(&outbuf[b], "%c", strbuf[a]);
 253         }
 254 }
 255
 256 void urlescputs(char *strbuf)
 257 {
 258         char outbuf[SIZ];
 259
 260         urlesc(outbuf, strbuf);
 261         wprintf("%s", outbuf);
 262 }
 263
 264
 265
 266
 267 /*
 268  * Output all that important stuff that the browser will want to see
 269  *
 270  * control codes:
 271  *
 272  * Bits 0 and 1:
 273  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 274  * 1 = HTTP headers plus the room banner
 275  * 2 = HTTP headers required to terminate the session (unset cookies)
 276  * 3 = HTTP and HTML headers, but no room banner
 277  *
 278  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 279  * Bit 3: suppress check for express messages
 280  * Bit 4: Allow browser to cache this document
 281  *
 282  */
 283 void output_headers(int controlcode)
 284 {
 285         char cookie[SIZ];
 286         int print_standard_html_head = 0;
 287         int refresh30 = 0;
 288         int suppress_check = 0;
 289         int cache = 0;
 290         char httpnow[SIZ];
 291         char onload_fcn[SIZ];
 292         static int pageseq = 0;
 293         print_standard_html_head        =       controlcode & 0x03;
 294         refresh30                       =       ((controlcode & 0x04) >> 2);
 295         suppress_check                  =       ((controlcode & 0x08) >> 3);
 296         cache                           =       ((controlcode & 0x10) >> 4);
 297
 298         wprintf("HTTP/1.0 200 OK\n");
 299
 300         httpdate(httpnow, time(NULL));
 301
 302         if (print_standard_html_head > 0) {
 303                 wprintf("Content-type: text/html\n"
 304                         "Server: %s\n", SERVER
 305                 );
 306                 if (!cache)
 307                         wprintf("Connection: close\n"
 308                                 "Pragma: no-cache\n"
 309                                 "Cache-Control: no-store\n"
 310                         );
 311         }
 312
 313         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 314                         WC->wc_password, WC->wc_roomname);
 315
 316         if (print_standard_html_head == 2) {
 317                 wprintf("Set-cookie: webcit=%s\n", unset);
 318         } else {
 319                 wprintf("Set-cookie: webcit=%s\n", cookie);
 320                 if (server_cookie != NULL) {
 321                         wprintf("%s\n", server_cookie);
 322                 }
 323         }
 324
 325         if (print_standard_html_head > 0) {
 326                 wprintf("\n");
 327
 328                 if (refresh30) svprintf("REFRESHTAG", WCS_STRING,
 329                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 330                 else svprintf("REFRESHTAG", WCS_STRING,
 331                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 332                 /* script for checking for pages (not always launched) */
 333
 334                 sprintf(onload_fcn, "function onload_fcn() { \n");
 335                 if (!WC->outside_frameset_allowed) {
 336                         strcat(onload_fcn, "  force_frameset();  \n");
 337                 }
 338                 if (!suppress_check) if (WC->HaveExpressMessages) {
 339                         strcat(onload_fcn, "  launch_page_popup();  \n");
 340                         WC->HaveExpressMessages = 0;
 341                 }
 342                 strcat(onload_fcn, "} \n");
 343
 344                 svprintf("PAGERSCRIPT", WCS_STRING,
 345                         "<SCRIPT LANGUAGE=\"JavaScript\">\n"
 346                         "function launch_page_popup() {\n"
 347                         "pwin = window.open('/page_popup', 'CitaPage%d', "
 348                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 349                         "scrollbars=yes,resizable=no,height=250,width=400');\n"
 350                         "}\n"
 351                         "function force_frameset() { \n"
 352                         " if (top.frames.length == 0) { \n"
 353                         "  top.location.replace('/do_welcome'); \n"
 354                         " } \n"
 355                         "} \n"
 356                         "%s\n"
 357                         "</SCRIPT>\n",
 358                         ++pageseq,
 359                         onload_fcn
 360                 );
 361                 /* end script */
 362
 363
 364                 do_template("head");
 365                 clear_local_substs();
 366
 367                 svprintf("extrabodyparms", WCS_STRING, "%s",
 368                         "onload='onload_fcn();' ");
 369
 370                 do_template("background");
 371                 clear_local_substs();
 372         }
 373
 374         if (print_standard_html_head == 1) {
 375                 wprintf("<A NAME=\"TheTop\"></A>");
 376                 embed_room_banner(NULL);
 377         }
 378
 379         if (strlen(WC->ImportantMessage) > 0) {
 380                 do_template("beginbox_nt");
 381                 wprintf("<SPAN CLASS=\"errormsg\">"
 382                         "%s</SPAN><BR>\n", WC->ImportantMessage);
 383                 do_template("endbox");
 384                 strcpy(WC->ImportantMessage, "");
 385         }
 386 }
 387
 388
 389 /*
 390  *
 391  */
 392 void http_redirect(char *whichpage) {
 393         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 394         wprintf("Location: %s\n", whichpage);
 395         wprintf("URI: %s\n", whichpage);
 396         wprintf("Content-type: text/html\n\n");
 397         wprintf("<html><body>\n");
 398         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 399                 whichpage);
 400         wprintf("</body></html>\n");
 401 }
 402
 403
 404
 405 void check_for_express_messages()
 406 {
 407         char buf[SIZ];
 408
 409         serv_puts("NOOP");
 410         serv_gets(buf);
 411         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 412 }
 413
 414
 415
 416
 417 /*
 418  * Output a piece of content to the web browser
 419  */
 420 void http_transmit_thing(char *thing, size_t length, char *content_type,
 421                          int is_static) {
 422         output_headers(is_static ? 0x10 : 0x00);
 423         wprintf("Content-type: %s\n"
 424                 "Content-length: %ld\n"
 425                 "Server: %s\n"
 426                 "Connection: close\n"
 427                 "\n",
 428                 content_type,
 429                 (long) length,
 430                 SERVER
 431         );
 432         write(WC->http_sock, thing, (size_t)length);
 433 }
 434
 435
 436
 437
 438 void output_static(char *what)
 439 {
 440         char buf[4096];
 441         FILE *fp;
 442         struct stat statbuf;
 443         off_t bytes;
 444         char *bigbuffer;
 445         char content_type[SIZ];
 446
 447         lprintf(9, "output_static(%s)\n", what);
 448         sprintf(buf, "static/%s", what);
 449         fp = fopen(buf, "rb");
 450         if (fp == NULL) {
 451                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 452                 wprintf("Content-Type: text/plain\n");
 453                 wprintf("\n");
 454                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 455         } else {
 456                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 457                         strcpy(content_type, "image/gif");
 458                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 459                         strcpy(content_type, "text/plain");
 460                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 461                         strcpy(content_type, "text/css");
 462                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 463                         strcpy(content_type, "image/jpeg");
 464                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 465                         strcpy(content_type, "image/png");
 466                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 467                         strcpy(content_type, "image/x-icon");
 468                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 469                         strcpy(content_type, "text/html");
 470                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 471                         strcpy(content_type, "text/vnd.wap.wml");
 472                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 473                         strcpy(content_type, "text/vnd.wap.wmlscript");
 474                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 475                         strcpy(content_type, "application/vnd.wap.wmlc");
 476                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 477                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 478                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 479                         wprintf("Content-type: image/vnd.wap.wbmp");
 480                 else
 481                         wprintf("Content-type: application/octet-stream");
 482
 483                 fstat(fileno(fp), &statbuf);
 484                 bytes = statbuf.st_size;
 485                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 486                 bigbuffer = malloc(bytes);
 487                 fread(bigbuffer, bytes, 1, fp);
 488                 fclose(fp);
 489
 490                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 491                 free(bigbuffer);
 492         }
 493         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 494                 end_webcit_session();
 495         }
 496 }
 497
 498
 499 /*
 500  * When the browser requests an image file from the Citadel server,
 501  * this function is called to transmit it.
 502  */
 503 void output_image()
 504 {
 505         char buf[SIZ];
 506         char *xferbuf = NULL;
 507         off_t bytes;
 508
 509         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 510         serv_gets(buf);
 511         if (buf[0] == '2') {
 512                 bytes = extract_long(&buf[4], 0);
 513                 xferbuf = malloc(bytes);
 514
 515                 /* Read it from the server */
 516                 read_server_binary(xferbuf, bytes);
 517                 serv_puts("CLOS");
 518                 serv_gets(buf);
 519
 520                 /* Write it to the browser */
 521                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 522                 free(xferbuf);
 523
 524         } else {
 525
 526                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 527                  * when there's no such image on the server.
 528                  */
 529                 output_static("blank.gif");
 530
 531                 /*
 532                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 533                 output_headers(0);
 534                 wprintf("Content-Type: text/plain\n"
 535                         "\n"
 536                         "Error retrieving image: %s\n",
 537                         &buf[4]
 538                 );
 539                 */
 540
 541         }
 542
 543
 544
 545 }
 546
 547 /*
 548  */
 549 void output_mimepart()
 550 {
 551         char buf[SIZ];
 552         off_t bytes;
 553         char content_type[SIZ];
 554         char *content = NULL;
 555
 556         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 557         serv_gets(buf);
 558         if (buf[0] == '2') {
 559                 bytes = extract_long(&buf[4], 0);
 560                 content = malloc(bytes);
 561                 extract(content_type, &buf[4], 3);
 562                 output_headers(0);
 563                 read_server_binary(content, bytes);
 564                 serv_puts("CLOS");
 565                 serv_gets(buf);
 566                 http_transmit_thing(content, bytes, content_type, 0);
 567                 free(content);
 568         } else {
 569                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 570                 output_headers(0);
 571                 wprintf("Content-Type: text/plain\n");
 572                 wprintf("\n");
 573                 wprintf("Error retrieving part: %s\n", &buf[4]);
 574         }
 575
 576 }
 577
 578
 579 /*
 580  */
 581 char *load_mimepart(long msgnum, char *partnum)
 582 {
 583         char buf[SIZ];
 584         off_t bytes;
 585         char content_type[SIZ];
 586         char *content;
 587
 588         serv_printf("OPNA %ld|%s", msgnum, partnum);
 589         serv_gets(buf);
 590         if (buf[0] == '2') {
 591                 bytes = extract_long(&buf[4], 0);
 592                 extract(content_type, &buf[4], 3);
 593
 594                 content = malloc(bytes + 1);
 595                 read_server_binary(content, bytes);
 596
 597                 serv_puts("CLOS");
 598                 serv_gets(buf);
 599                 content[bytes] = 0;     /* null terminate for good measure */
 600                 return(content);
 601         }
 602         else {
 603                 return(NULL);
 604         }
 605
 606 }
 607
 608
 609 /*
 610  * Convenience functions to display a page containing only a string
 611  */
 612 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 613 {
 614         wprintf("HTTP/1.0 200 OK\n");
 615         output_headers(1);
 616         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 617         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 618         wprintf("</TD></TR></TABLE><BR>\n");
 619         escputs(messagetext);
 620
 621         wprintf("<HR>\n");
 622         wDumpContent(1);
 623 }
 624
 625
 626 /*
 627  * Display a blank page.
 628  */
 629 void blank_page(void) {
 630         output_headers(7);
 631         wDumpContent(2);
 632 }
 633
 634
 635 /*
 636  * A template has been requested
 637  */
 638 void url_do_template(void) {
 639         do_template(bstr("template"));
 640 }
 641
 642
 643
 644 /*
 645  * Offer to make any page the user's "start page."
 646  */
 647 void offer_start_page(void) {
 648         wprintf("<A HREF=\"/change_start_page?startpage=");
 649         urlescputs(WC->this_page);
 650         wprintf("\">"
 651                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 652                 "</A>"
 653         );
 654 }
 655
 656
 657 /*
 658  * Change the user's start page
 659  */
 660 void change_start_page(void) {
 661
 662         if (bstr("startpage") == NULL) {
 663                 strcpy(WC->ImportantMessage,
 664                         "startpage set to null");
 665                 display_main_menu();
 666                 return;
 667         }
 668
 669         set_preference("startpage", bstr("startpage"));
 670
 671         output_headers(3);
 672         do_template("newstartpage");
 673         wDumpContent(1);
 674 }
 675
 676
 677
 678
 679 void display_success(char *successmessage)
 680 {
 681         convenience_page("007700", "OK", successmessage);
 682 }
 683
 684
 685
 686 void extract_action(char *actbuf, char *cmdbuf)
 687 {
 688         int i;
 689
 690         strcpy(actbuf, cmdbuf);
 691         if (!strncasecmp(actbuf, "GET /", 5))
 692                 strcpy(actbuf, &actbuf[5]);
 693         if (!strncasecmp(actbuf, "PUT /", 5))
 694                 strcpy(actbuf, &actbuf[5]);
 695         if (!strncasecmp(actbuf, "POST /", 6))
 696                 strcpy(actbuf, &actbuf[6]);
 697
 698         for (i = 0; i < strlen(actbuf); ++i) {
 699                 if (actbuf[i] == ' ') {
 700                         actbuf[i] = 0;
 701                         i = 0;
 702                 }
 703                 if (actbuf[i] == '/') {
 704                         actbuf[i] = 0;
 705                         i = 0;
 706                 }
 707                 if (actbuf[i] == '?') {
 708                         actbuf[i] = 0;
 709                         i = 0;
 710                 }
 711                 if (actbuf[i] == '&') {
 712                         actbuf[i] = 0;
 713                         i = 0;
 714                 }
 715         }
 716 }
 717
 718
 719 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 720                         void *content, char *cbtype, size_t length,
 721                         char *encoding, void *userdata)
 722 {
 723         struct urlcontent *u;
 724
 725         /* Form fields */
 726         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 727                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 728                 u->next = WC->urlstrings;
 729                 WC->urlstrings = u;
 730                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 731                 u->url_data = malloc(length + 1);
 732                 memcpy(u->url_data, content, length);
 733                 u->url_data[length] = 0;
 734         }
 735
 736         /* Uploaded files */
 737         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 738                 WC->upload = malloc(length);
 739                 if (WC->upload != NULL) {
 740                         WC->upload_length = length;
 741                         safestrncpy(WC->upload_filename, filename,
 742                                         sizeof(WC->upload_filename));
 743                         safestrncpy(WC->upload_content_type, cbtype,
 744                                         sizeof(WC->upload_content_type));
 745                         memcpy(WC->upload, content, length);
 746                 }
 747                 else {
 748                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 749                 }
 750         }
 751
 752 }
 753
 754
 755
 756
 757 /*
 758  * Entry point for WebCit transaction
 759  */
 760 void session_loop(struct httprequest *req)
 761 {
 762         char cmd[SIZ];
 763         char action[SIZ];
 764         char buf[SIZ];
 765         int a, b;
 766         int ContentLength = 0;
 767         int BytesRead;
 768         char ContentType[512];
 769         char *content;
 770         char *content_end;
 771         struct httprequest *hptr;
 772         char browser_host[SIZ];
 773         char user_agent[SIZ];
 774         int body_start;
 775
 776         /* We stuff these with the values coming from the client cookies,
 777          * so we can use them to reconnect a timed out session if we have to.
 778          */
 779         char c_username[SIZ];
 780         char c_password[SIZ];
 781         char c_roomname[SIZ];
 782         char cookie[SIZ];
 783
 784         strcpy(c_username, "");
 785         strcpy(c_password, "");
 786         strcpy(c_roomname, "");
 787
 788         WC->upload_length = 0;
 789         WC->upload = NULL;
 790
 791         WC->is_wap = 0;
 792
 793         hptr = req;
 794         if (hptr == NULL) return;
 795
 796         strcpy(cmd, hptr->line);
 797         hptr = hptr->next;
 798         extract_action(action, cmd);
 799
 800         while (hptr != NULL) {
 801                 strcpy(buf, hptr->line);
 802                 hptr = hptr->next;
 803
 804                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 805                         strcpy(cookie, &buf[15]);
 806                         cookie_to_stuff(cookie, NULL,
 807                                       c_username, c_password, c_roomname);
 808                 }
 809                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 810                         ContentLength = atoi(&buf[16]);
 811                 }
 812                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 813                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 814                 }
 815                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 816                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 817                 }
 818                 else if (!strncasecmp(buf, "Host: ", 6)) {
 819                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 820                 }
 821                 /* Only WAP gateways explicitly name this content-type */
 822                 else if (strstr(buf, "text/vnd.wap.wml")) {
 823                         WC->is_wap = 1;
 824                 }
 825         }
 826
 827         if (ContentLength > 0) {
 828                 content = malloc(ContentLength + SIZ);
 829                 memset(content, 0, ContentLength + SIZ);
 830                 sprintf(content, "Content-type: %s\n"
 831                                 "Content-length: %d\n\n",
 832                                 ContentType, ContentLength);
 833                 body_start = strlen(content);
 834
 835                 BytesRead = 0;
 836                 while (BytesRead < ContentLength) {
 837                         a=read(WC->http_sock, &content[BytesRead+body_start],
 838                                 ContentLength - BytesRead);
 839                         if (a <= 0) BytesRead = ContentLength;
 840                         else BytesRead += a;
 841                 }
 842
 843                 if (!strncasecmp(ContentType,
 844                               "application/x-www-form-urlencoded", 33)) {
 845                         addurls(&content[body_start]);
 846                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 847                         content_end = content + ContentLength + body_start;
 848                         mime_parser(content, content_end, *upload_handler,
 849                                         NULL, NULL, NULL, 0);
 850                 }
 851         } else {
 852                 content = NULL;
 853         }
 854
 855         /* make a note of where we are in case the user wants to save it */
 856         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 857         remove_token(WC->this_page, 2, ' ');
 858         remove_token(WC->this_page, 0, ' ');
 859
 860         /* If there are variables in the URL, we must grab them now */
 861         for (a = 0; a < strlen(cmd); ++a) {
 862                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 863                         for (b = a; b < strlen(cmd); ++b)
 864                                 if (isspace(cmd[b]))
 865                                         cmd[b] = 0;
 866                         addurls(&cmd[a + 1]);
 867                         cmd[a] = 0;
 868                 }
 869         }
 870
 871         /* Static content can be sent without connecting to Citadel. */
 872         if (!strcasecmp(action, "static")) {
 873                 strcpy(buf, &cmd[12]);
 874                 for (a = 0; a < strlen(buf); ++a)
 875                         if (isspace(buf[a]))
 876                                 buf[a] = 0;
 877                 output_static(buf);
 878                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 879         }
 880
 881         /*
 882          * If we're not connected to a Citadel server, try to hook up the
 883          * connection now.
 884          */
 885         if (!WC->connected) {
 886                 if (!strcasecmp(ctdlhost, "uds")) {
 887                         /* unix domain socket */
 888                         sprintf(buf, "%s/citadel.socket", ctdlport);
 889                         WC->serv_sock = uds_connectsock(buf);
 890                 }
 891                 else {
 892                         /* tcp socket */
 893                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 894                 }
 895
 896                 if (WC->serv_sock < 0) {
 897                         do_logout();
 898                         goto SKIP_ALL_THIS_CRAP;
 899                 }
 900                 else {
 901                         WC->connected = 1;
 902                         serv_gets(buf); /* get the server welcome message */
 903                         locate_host(browser_host, WC->http_sock);
 904                         get_serv_info(browser_host, user_agent);
 905                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 906                                 wprintf("You are connected to a Citadel "
 907                                         "server running Citadel %d.%02d;\nin "
 908                                         "order to run this version of WebCit "
 909                                         "you must also have Citadel %d.%02d or"
 910                                         " newer.\n\n\n",
 911                                                 serv_info.serv_rev_level / 100,
 912                                                 serv_info.serv_rev_level % 100,
 913                                                 MINIMUM_CIT_VERSION / 100,
 914                                                 MINIMUM_CIT_VERSION % 100
 915                                         );
 916                                 end_webcit_session();
 917                                 goto SKIP_ALL_THIS_CRAP;
 918                         }
 919                 }
 920         }
 921
 922         /*
 923          * Functions which can be performed without logging in
 924          */
 925         if (!strcasecmp(action, "listsub")) {
 926                 do_listsub();
 927                 goto SKIP_ALL_THIS_CRAP;
 928         }
 929 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
 930         if (!strcasecmp(action, "freebusy")) {
 931                 do_freebusy(cmd);
 932                 goto SKIP_ALL_THIS_CRAP;
 933         }
 934 #endif
 935
 936         check_for_express_messages();
 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 ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 943                 serv_printf("USER %s", c_username);
 944                 serv_gets(buf);
 945                 if (buf[0] == '3') {
 946                         serv_printf("PASS %s", c_password);
 947                         serv_gets(buf);
 948                         if (buf[0] == '2') {
 949                                 become_logged_in(c_username, c_password, buf);
 950                         }
 951                 }
 952         }
 953         /*
 954          * If we don't have a current room, but a cookie specifying the
 955          * current room is supplied, make an effort to go there.
 956          */
 957         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 958                 serv_printf("GOTO %s", c_roomname);
 959                 serv_gets(buf);
 960                 if (buf[0] == '2') {
 961                         strcpy(WC->wc_roomname, c_roomname);
 962                 }
 963         }
 964
 965         if (!strcasecmp(action, "image")) {
 966                 output_image();
 967
 968         /*
 969          * All functions handled below this point ... make sure we log in
 970          * before doing anything else!
 971          */
 972         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 973                 do_login();
 974         } else if (!WC->logged_in) {
 975                 display_login(NULL);
 976         }
 977
 978         /*
 979          * Various commands...
 980          */
 981
 982         else if (!strcasecmp(action, "do_welcome")) {
 983                 do_welcome();
 984         } else if (!strcasecmp(action, "blank")) {
 985                 blank_page();
 986         } else if (!strcasecmp(action, "do_template")) {
 987                 url_do_template();
 988         } else if (!strcasecmp(action, "display_main_menu")) {
 989                 display_main_menu();
 990         } else if (!strcasecmp(action, "whobbs")) {
 991                 whobbs();
 992         } else if (!strcasecmp(action, "knrooms")) {
 993                 knrooms();
 994         } else if (!strcasecmp(action, "gotonext")) {
 995                 slrp_highest();
 996                 gotonext();
 997         } else if (!strcasecmp(action, "skip")) {
 998                 gotonext();
 999         } else if (!strcasecmp(action, "ungoto")) {
1000                 ungoto();
1001         } else if (!strcasecmp(action, "dotgoto")) {
1002                 slrp_highest();
1003                 smart_goto(bstr("room"));
1004         } else if (!strcasecmp(action, "dotskip")) {
1005                 smart_goto(bstr("room"));
1006         } else if (!strcasecmp(action, "termquit")) {
1007                 do_logout();
1008         } else if (!strcasecmp(action, "readnew")) {
1009                 readloop("readnew");
1010         } else if (!strcasecmp(action, "readold")) {
1011                 readloop("readold");
1012         } else if (!strcasecmp(action, "readfwd")) {
1013                 readloop("readfwd");
1014         } else if (!strcasecmp(action, "headers")) {
1015                 readloop("headers");
1016         } else if (!strcasecmp(action, "display_enter")) {
1017                 display_enter();
1018         } else if (!strcasecmp(action, "post")) {
1019                 post_message();
1020         } else if (!strcasecmp(action, "delete_msg")) {
1021                 delete_msg();
1022         } else if (!strcasecmp(action, "confirm_move_msg")) {
1023                 confirm_move_msg();
1024         } else if (!strcasecmp(action, "move_msg")) {
1025                 move_msg();
1026         } else if (!strcasecmp(action, "userlist")) {
1027                 userlist();
1028         } else if (!strcasecmp(action, "showuser")) {
1029                 showuser();
1030         } else if (!strcasecmp(action, "display_page")) {
1031                 display_page();
1032         } else if (!strcasecmp(action, "page_user")) {
1033                 page_user();
1034         } else if (!strcasecmp(action, "chat")) {
1035                 do_chat();
1036         } else if (!strcasecmp(action, "display_private")) {
1037                 display_private("", 0);
1038         } else if (!strcasecmp(action, "goto_private")) {
1039                 goto_private();
1040         } else if (!strcasecmp(action, "zapped_list")) {
1041                 zapped_list();
1042         } else if (!strcasecmp(action, "display_zap")) {
1043                 display_zap();
1044         } else if (!strcasecmp(action, "zap")) {
1045                 zap();
1046         } else if (!strcasecmp(action, "display_entroom")) {
1047                 display_entroom();
1048         } else if (!strcasecmp(action, "entroom")) {
1049                 entroom();
1050         } else if (!strcasecmp(action, "display_editroom")) {
1051                 display_editroom();
1052         } else if (!strcasecmp(action, "netedit")) {
1053                 netedit();
1054         } else if (!strcasecmp(action, "editroom")) {
1055                 editroom();
1056         } else if (!strcasecmp(action, "display_whok")) {
1057                 display_whok();
1058         } else if (!strcasecmp(action, "display_editinfo")) {
1059                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1060         } else if (!strcasecmp(action, "editinfo")) {
1061                 save_edit("Room info", "EINF 1", 1);
1062         } else if (!strcasecmp(action, "display_editbio")) {
1063                 sprintf(buf, "RBIO %s", WC->wc_username);
1064                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1065         } else if (!strcasecmp(action, "editbio")) {
1066                 save_edit("Your bio", "EBIO", 0);
1067         } else if (!strcasecmp(action, "confirm_delete_room")) {
1068                 confirm_delete_room();
1069         } else if (!strcasecmp(action, "delete_room")) {
1070                 delete_room();
1071         } else if (!strcasecmp(action, "validate")) {
1072                 validate();
1073         } else if (!strcasecmp(action, "display_editpic")) {
1074                 display_graphics_upload("your photo",
1075                                         "UIMG 0|_userpic_",
1076                                         "/editpic");
1077         } else if (!strcasecmp(action, "editpic")) {
1078                 do_graphics_upload("UIMG 1|_userpic_");
1079         } else if (!strcasecmp(action, "display_editroompic")) {
1080                 display_graphics_upload("the graphic for this room",
1081                                         "UIMG 0|_roompic_",
1082                                         "/editroompic");
1083         } else if (!strcasecmp(action, "editroompic")) {
1084                 do_graphics_upload("UIMG 1|_roompic_");
1085         } else if (!strcasecmp(action, "delete_floor")) {
1086                 delete_floor();
1087         } else if (!strcasecmp(action, "rename_floor")) {
1088                 rename_floor();
1089         } else if (!strcasecmp(action, "create_floor")) {
1090                 create_floor();
1091         } else if (!strcasecmp(action, "display_editfloorpic")) {
1092                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1093                         bstr("which_floor"));
1094                 display_graphics_upload("the graphic for this floor",
1095                                         buf,
1096                                         "/editfloorpic");
1097         } else if (!strcasecmp(action, "editfloorpic")) {
1098                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1099                         bstr("which_floor"));
1100                 do_graphics_upload(buf);
1101         } else if (!strcasecmp(action, "display_reg")) {
1102                 display_reg(0);
1103         } else if (!strcasecmp(action, "display_changepw")) {
1104                 display_changepw();
1105         } else if (!strcasecmp(action, "changepw")) {
1106                 changepw();
1107         } else if (!strcasecmp(action, "display_edit_node")) {
1108                 display_edit_node();
1109         } else if (!strcasecmp(action, "edit_node")) {
1110                 edit_node();
1111         } else if (!strcasecmp(action, "display_netconf")) {
1112                 display_netconf();
1113         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1114                 display_confirm_delete_node();
1115         } else if (!strcasecmp(action, "delete_node")) {
1116                 delete_node();
1117         } else if (!strcasecmp(action, "display_add_node")) {
1118                 display_add_node();
1119         } else if (!strcasecmp(action, "add_node")) {
1120                 add_node();
1121         } else if (!strcasecmp(action, "terminate_session")) {
1122                 slrp_highest();
1123                 terminate_session();
1124         } else if (!strcasecmp(action, "edit_me")) {
1125                 edit_me();
1126         } else if (!strcasecmp(action, "display_siteconfig")) {
1127                 display_siteconfig();
1128         } else if (!strcasecmp(action, "chat_recv")) {
1129                 chat_recv();
1130         } else if (!strcasecmp(action, "chat_send")) {
1131                 chat_send();
1132         } else if (!strcasecmp(action, "page_popup")) {
1133                 page_popup();
1134         } else if (!strcasecmp(action, "siteconfig")) {
1135                 siteconfig();
1136         } else if (!strcasecmp(action, "display_generic")) {
1137                 display_generic();
1138         } else if (!strcasecmp(action, "do_generic")) {
1139                 do_generic();
1140         } else if (!strcasecmp(action, "display_menubar")) {
1141                 display_menubar(1);
1142         } else if (!strcasecmp(action, "output_mimepart")) {
1143                 output_mimepart();
1144         } else if (!strcasecmp(action, "edit_vcard")) {
1145                 edit_vcard();
1146         } else if (!strcasecmp(action, "submit_vcard")) {
1147                 submit_vcard();
1148         } else if (!strcasecmp(action, "select_user_to_edit")) {
1149                 select_user_to_edit(NULL, NULL);
1150         } else if (!strcasecmp(action, "display_edituser")) {
1151                 display_edituser(NULL);
1152         } else if (!strcasecmp(action, "edituser")) {
1153                 edituser();
1154         } else if (!strcasecmp(action, "create_user")) {
1155                 create_user();
1156         } else if (!strcasecmp(action, "changeview")) {
1157                 change_view();
1158         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1159                 do_stuff_to_msgs();
1160         } else if (!strcasecmp(action, "change_start_page")) {
1161                 change_start_page();
1162         } else if (!strcasecmp(action, "display_floorconfig")) {
1163                 display_floorconfig(NULL);
1164         } else if (!strcasecmp(action, "toggle_self_service")) {
1165                 toggle_self_service();
1166 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1167         } else if (!strcasecmp(action, "display_edit_task")) {
1168                 display_edit_task();
1169         } else if (!strcasecmp(action, "save_task")) {
1170                 save_task();
1171         } else if (!strcasecmp(action, "display_edit_event")) {
1172                 display_edit_event();
1173         } else if (!strcasecmp(action, "save_event")) {
1174                 save_event();
1175         } else if (!strcasecmp(action, "respond_to_request")) {
1176                 respond_to_request();
1177         } else if (!strcasecmp(action, "handle_rsvp")) {
1178                 handle_rsvp();
1179 #endif
1180         } else if (!strcasecmp(action, "summary")) {
1181                 summary();
1182         } else if (!strcasecmp(action, "iconbar")) {
1183                 do_iconbar();
1184         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1185                 display_customize_iconbar();
1186         } else if (!strcasecmp(action, "commit_iconbar")) {
1187                 commit_iconbar();
1188         } else if (!strcasecmp(action, "diagnostics")) {
1189                 output_headers(1);
1190
1191                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1192                 wprintf("Command: <BR><PRE>\n");
1193                 escputs(cmd);
1194                 wprintf("</PRE><HR>\n");
1195                 wprintf("Variables: <BR><PRE>\n");
1196                 dump_vars();
1197                 wprintf("</PRE><HR>\n");
1198                 wDumpContent(1);
1199         }
1200         /* When all else fais, display the main menu. */
1201         else {
1202                 display_main_menu();
1203         }
1204
1205 SKIP_ALL_THIS_CRAP:
1206         fflush(stdout);
1207         if (content != NULL) {
1208                 free(content);
1209                 content = NULL;
1210         }
1211         free_urls();
1212         if (WC->upload_length > 0) {
1213                 free(WC->upload);
1214                 WC->upload_length = 0;
1215         }
1216
1217 }