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) - 5], ".html", 5))
 467                         strcpy(content_type, "text/html");
 468                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 469                         strcpy(content_type, "text/vnd.wap.wml");
 470                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 471                         strcpy(content_type, "text/vnd.wap.wmlscript");
 472                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 473                         strcpy(content_type, "application/vnd.wap.wmlc");
 474                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 475                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 476                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 477                         wprintf("Content-type: image/vnd.wap.wbmp");
 478                 else
 479                         wprintf("Content-type: application/octet-stream");
 480
 481                 fstat(fileno(fp), &statbuf);
 482                 bytes = statbuf.st_size;
 483                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 484                 bigbuffer = malloc(bytes);
 485                 fread(bigbuffer, bytes, 1, fp);
 486                 fclose(fp);
 487
 488                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 489                 free(bigbuffer);
 490         }
 491         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 492                 end_webcit_session();
 493         }
 494 }
 495
 496
 497 /*
 498  * When the browser requests an image file from the Citadel server,
 499  * this function is called to transmit it.
 500  */
 501 void output_image()
 502 {
 503         char buf[SIZ];
 504         char *xferbuf = NULL;
 505         off_t bytes;
 506
 507         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 508         serv_gets(buf);
 509         if (buf[0] == '2') {
 510                 bytes = extract_long(&buf[4], 0);
 511                 xferbuf = malloc(bytes);
 512
 513                 /* Read it from the server */
 514                 read_server_binary(xferbuf, bytes);
 515                 serv_puts("CLOS");
 516                 serv_gets(buf);
 517
 518                 /* Write it to the browser */
 519                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 520                 free(xferbuf);
 521
 522         } else {
 523
 524                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 525                  * when there's no such image on the server.
 526                  */
 527                 output_static("blank.gif");
 528
 529                 /*
 530                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 531                 output_headers(0);
 532                 wprintf("Content-Type: text/plain\n"
 533                         "\n"
 534                         "Error retrieving image: %s\n",
 535                         &buf[4]
 536                 );
 537                 */
 538
 539         }
 540
 541
 542
 543 }
 544
 545 /*
 546  */
 547 void output_mimepart()
 548 {
 549         char buf[SIZ];
 550         off_t bytes;
 551         char content_type[SIZ];
 552         char *content = NULL;
 553
 554         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 555         serv_gets(buf);
 556         if (buf[0] == '2') {
 557                 bytes = extract_long(&buf[4], 0);
 558                 content = malloc(bytes);
 559                 extract(content_type, &buf[4], 3);
 560                 output_headers(0);
 561                 read_server_binary(content, bytes);
 562                 serv_puts("CLOS");
 563                 serv_gets(buf);
 564                 http_transmit_thing(content, bytes, content_type, 0);
 565                 free(content);
 566         } else {
 567                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 568                 output_headers(0);
 569                 wprintf("Content-Type: text/plain\n");
 570                 wprintf("\n");
 571                 wprintf("Error retrieving part: %s\n", &buf[4]);
 572         }
 573
 574 }
 575
 576
 577 /*
 578  */
 579 char *load_mimepart(long msgnum, char *partnum)
 580 {
 581         char buf[SIZ];
 582         off_t bytes;
 583         char content_type[SIZ];
 584         char *content;
 585
 586         serv_printf("OPNA %ld|%s", msgnum, partnum);
 587         serv_gets(buf);
 588         if (buf[0] == '2') {
 589                 bytes = extract_long(&buf[4], 0);
 590                 extract(content_type, &buf[4], 3);
 591
 592                 content = malloc(bytes + 1);
 593                 read_server_binary(content, bytes);
 594
 595                 serv_puts("CLOS");
 596                 serv_gets(buf);
 597                 content[bytes] = 0;     /* null terminate for good measure */
 598                 return(content);
 599         }
 600         else {
 601                 return(NULL);
 602         }
 603
 604 }
 605
 606
 607 /*
 608  * Convenience functions to display a page containing only a string
 609  */
 610 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 611 {
 612         wprintf("HTTP/1.0 200 OK\n");
 613         output_headers(1);
 614         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 615         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 616         wprintf("</TD></TR></TABLE><BR>\n");
 617         escputs(messagetext);
 618
 619         wprintf("<HR>\n");
 620         wDumpContent(1);
 621 }
 622
 623
 624 /*
 625  * Display a blank page.
 626  */
 627 void blank_page(void) {
 628         output_headers(7);
 629         wDumpContent(2);
 630 }
 631
 632
 633 /*
 634  * A template has been requested
 635  */
 636 void url_do_template(void) {
 637         do_template(bstr("template"));
 638 }
 639
 640
 641
 642 /*
 643  * Offer to make any page the user's "start page."
 644  */
 645 void offer_start_page(void) {
 646         wprintf("<A HREF=\"/change_start_page?startpage=");
 647         urlescputs(WC->this_page);
 648         wprintf("\">"
 649                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 650                 "</A>"
 651         );
 652 }
 653
 654
 655 /*
 656  * Change the user's start page
 657  */
 658 void change_start_page(void) {
 659
 660         if (bstr("startpage") == NULL) {
 661                 strcpy(WC->ImportantMessage,
 662                         "startpage set to null");
 663                 display_main_menu();
 664                 return;
 665         }
 666
 667         set_preference("startpage", bstr("startpage"));
 668
 669         output_headers(3);
 670         do_template("newstartpage");
 671         wDumpContent(1);
 672 }
 673
 674
 675
 676
 677 void display_success(char *successmessage)
 678 {
 679         convenience_page("007700", "OK", successmessage);
 680 }
 681
 682
 683
 684 void extract_action(char *actbuf, char *cmdbuf)
 685 {
 686         int i;
 687
 688         strcpy(actbuf, cmdbuf);
 689         if (!strncasecmp(actbuf, "GET /", 5))
 690                 strcpy(actbuf, &actbuf[5]);
 691         if (!strncasecmp(actbuf, "PUT /", 5))
 692                 strcpy(actbuf, &actbuf[5]);
 693         if (!strncasecmp(actbuf, "POST /", 6))
 694                 strcpy(actbuf, &actbuf[6]);
 695
 696         for (i = 0; i < strlen(actbuf); ++i) {
 697                 if (actbuf[i] == ' ') {
 698                         actbuf[i] = 0;
 699                         i = 0;
 700                 }
 701                 if (actbuf[i] == '/') {
 702                         actbuf[i] = 0;
 703                         i = 0;
 704                 }
 705                 if (actbuf[i] == '?') {
 706                         actbuf[i] = 0;
 707                         i = 0;
 708                 }
 709                 if (actbuf[i] == '&') {
 710                         actbuf[i] = 0;
 711                         i = 0;
 712                 }
 713         }
 714 }
 715
 716
 717 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 718                         void *content, char *cbtype, size_t length,
 719                         char *encoding, void *userdata)
 720 {
 721         struct urlcontent *u;
 722
 723         /* Form fields */
 724         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 725                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 726                 u->next = WC->urlstrings;
 727                 WC->urlstrings = u;
 728                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 729                 u->url_data = malloc(length + 1);
 730                 memcpy(u->url_data, content, length);
 731                 u->url_data[length] = 0;
 732         }
 733
 734         /* Uploaded files */
 735         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 736                 WC->upload = malloc(length);
 737                 if (WC->upload != NULL) {
 738                         WC->upload_length = length;
 739                         safestrncpy(WC->upload_filename, filename,
 740                                         sizeof(WC->upload_filename));
 741                         safestrncpy(WC->upload_content_type, cbtype,
 742                                         sizeof(WC->upload_content_type));
 743                         memcpy(WC->upload, content, length);
 744                 }
 745                 else {
 746                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 747                 }
 748         }
 749
 750 }
 751
 752
 753
 754
 755 /*
 756  * Entry point for WebCit transaction
 757  */
 758 void session_loop(struct httprequest *req)
 759 {
 760         char cmd[SIZ];
 761         char action[SIZ];
 762         char buf[SIZ];
 763         int a, b;
 764         int ContentLength = 0;
 765         int BytesRead;
 766         char ContentType[512];
 767         char *content;
 768         char *content_end;
 769         struct httprequest *hptr;
 770         char browser_host[SIZ];
 771         char user_agent[SIZ];
 772         int body_start;
 773
 774         /* We stuff these with the values coming from the client cookies,
 775          * so we can use them to reconnect a timed out session if we have to.
 776          */
 777         char c_username[SIZ];
 778         char c_password[SIZ];
 779         char c_roomname[SIZ];
 780         char cookie[SIZ];
 781
 782         strcpy(c_username, "");
 783         strcpy(c_password, "");
 784         strcpy(c_roomname, "");
 785
 786         WC->upload_length = 0;
 787         WC->upload = NULL;
 788
 789         WC->is_wap = 0;
 790
 791         hptr = req;
 792         if (hptr == NULL) return;
 793
 794         strcpy(cmd, hptr->line);
 795         hptr = hptr->next;
 796         extract_action(action, cmd);
 797
 798         while (hptr != NULL) {
 799                 strcpy(buf, hptr->line);
 800                 hptr = hptr->next;
 801
 802                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 803                         strcpy(cookie, &buf[15]);
 804                         cookie_to_stuff(cookie, NULL,
 805                                       c_username, c_password, c_roomname);
 806                 }
 807                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 808                         ContentLength = atoi(&buf[16]);
 809                 }
 810                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 811                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 812                 }
 813                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 814                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 815                 }
 816                 else if (!strncasecmp(buf, "Host: ", 6)) {
 817                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 818                 }
 819                 /* Only WAP gateways explicitly name this content-type */
 820                 else if (strstr(buf, "text/vnd.wap.wml")) {
 821                         WC->is_wap = 1;
 822                 }
 823         }
 824
 825         if (ContentLength > 0) {
 826                 content = malloc(ContentLength + SIZ);
 827                 memset(content, 0, ContentLength + SIZ);
 828                 sprintf(content, "Content-type: %s\n"
 829                                 "Content-length: %d\n\n",
 830                                 ContentType, ContentLength);
 831                 body_start = strlen(content);
 832
 833                 BytesRead = 0;
 834                 while (BytesRead < ContentLength) {
 835                         a=read(WC->http_sock, &content[BytesRead+body_start],
 836                                 ContentLength - BytesRead);
 837                         if (a <= 0) BytesRead = ContentLength;
 838                         else BytesRead += a;
 839                 }
 840
 841                 if (!strncasecmp(ContentType,
 842                               "application/x-www-form-urlencoded", 33)) {
 843                         addurls(&content[body_start]);
 844                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 845                         content_end = content + ContentLength + body_start;
 846                         mime_parser(content, content_end, *upload_handler,
 847                                         NULL, NULL, NULL, 0);
 848                 }
 849         } else {
 850                 content = NULL;
 851         }
 852
 853         /* make a note of where we are in case the user wants to save it */
 854         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 855         remove_token(WC->this_page, 2, ' ');
 856         remove_token(WC->this_page, 0, ' ');
 857
 858         /* If there are variables in the URL, we must grab them now */
 859         for (a = 0; a < strlen(cmd); ++a) {
 860                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 861                         for (b = a; b < strlen(cmd); ++b)
 862                                 if (isspace(cmd[b]))
 863                                         cmd[b] = 0;
 864                         addurls(&cmd[a + 1]);
 865                         cmd[a] = 0;
 866                 }
 867         }
 868
 869         /* Static content can be sent without connecting to Citadel. */
 870         if (!strcasecmp(action, "static")) {
 871                 strcpy(buf, &cmd[12]);
 872                 for (a = 0; a < strlen(buf); ++a)
 873                         if (isspace(buf[a]))
 874                                 buf[a] = 0;
 875                 output_static(buf);
 876                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 877         }
 878
 879         /*
 880          * If we're not connected to a Citadel server, try to hook up the
 881          * connection now.
 882          */
 883         if (!WC->connected) {
 884                 if (!strcasecmp(ctdlhost, "uds")) {
 885                         /* unix domain socket */
 886                         sprintf(buf, "%s/citadel.socket", ctdlport);
 887                         WC->serv_sock = uds_connectsock(buf);
 888                 }
 889                 else {
 890                         /* tcp socket */
 891                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 892                 }
 893
 894                 if (WC->serv_sock < 0) {
 895                         do_logout();
 896                         goto SKIP_ALL_THIS_CRAP;
 897                 }
 898                 else {
 899                         WC->connected = 1;
 900                         serv_gets(buf); /* get the server welcome message */
 901                         locate_host(browser_host, WC->http_sock);
 902                         get_serv_info(browser_host, user_agent);
 903                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 904                                 wprintf("You are connected to a Citadel "
 905                                         "server running Citadel %d.%02d;\nin "
 906                                         "order to run this version of WebCit "
 907                                         "you must also have Citadel %d.%02d or"
 908                                         " newer.\n\n\n",
 909                                                 serv_info.serv_rev_level / 100,
 910                                                 serv_info.serv_rev_level % 100,
 911                                                 MINIMUM_CIT_VERSION / 100,
 912                                                 MINIMUM_CIT_VERSION % 100
 913                                         );
 914                                 end_webcit_session();
 915                                 goto SKIP_ALL_THIS_CRAP;
 916                         }
 917                 }
 918         }
 919
 920         /*
 921          * Functions which can be performed without logging in
 922          */
 923         if (!strcasecmp(action, "listsub")) {
 924                 do_listsub();
 925                 goto SKIP_ALL_THIS_CRAP;
 926         }
 927 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
 928         if (!strcasecmp(action, "freebusy")) {
 929                 do_freebusy(cmd);
 930                 goto SKIP_ALL_THIS_CRAP;
 931         }
 932 #endif
 933
 934         check_for_express_messages();
 935
 936         /*
 937          * If we're not logged in, but we have username and password cookies
 938          * supplied by the browser, try using them to log in.
 939          */
 940         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 941                 serv_printf("USER %s", c_username);
 942                 serv_gets(buf);
 943                 if (buf[0] == '3') {
 944                         serv_printf("PASS %s", c_password);
 945                         serv_gets(buf);
 946                         if (buf[0] == '2') {
 947                                 become_logged_in(c_username, c_password, buf);
 948                         }
 949                 }
 950         }
 951         /*
 952          * If we don't have a current room, but a cookie specifying the
 953          * current room is supplied, make an effort to go there.
 954          */
 955         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 956                 serv_printf("GOTO %s", c_roomname);
 957                 serv_gets(buf);
 958                 if (buf[0] == '2') {
 959                         strcpy(WC->wc_roomname, c_roomname);
 960                 }
 961         }
 962
 963         if (!strcasecmp(action, "image")) {
 964                 output_image();
 965
 966         /*
 967          * All functions handled below this point ... make sure we log in
 968          * before doing anything else!
 969          */
 970         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 971                 do_login();
 972         } else if (!WC->logged_in) {
 973                 display_login(NULL);
 974         }
 975
 976         /*
 977          * Various commands...
 978          */
 979
 980         else if (!strcasecmp(action, "do_welcome")) {
 981                 do_welcome();
 982         } else if (!strcasecmp(action, "blank")) {
 983                 blank_page();
 984         } else if (!strcasecmp(action, "do_template")) {
 985                 url_do_template();
 986         } else if (!strcasecmp(action, "display_main_menu")) {
 987                 display_main_menu();
 988         } else if (!strcasecmp(action, "whobbs")) {
 989                 whobbs();
 990         } else if (!strcasecmp(action, "knrooms")) {
 991                 knrooms();
 992         } else if (!strcasecmp(action, "gotonext")) {
 993                 slrp_highest();
 994                 gotonext();
 995         } else if (!strcasecmp(action, "skip")) {
 996                 gotonext();
 997         } else if (!strcasecmp(action, "ungoto")) {
 998                 ungoto();
 999         } else if (!strcasecmp(action, "dotgoto")) {
1000                 slrp_highest();
1001                 smart_goto(bstr("room"));
1002         } else if (!strcasecmp(action, "dotskip")) {
1003                 smart_goto(bstr("room"));
1004         } else if (!strcasecmp(action, "termquit")) {
1005                 do_logout();
1006         } else if (!strcasecmp(action, "readnew")) {
1007                 readloop("readnew");
1008         } else if (!strcasecmp(action, "readold")) {
1009                 readloop("readold");
1010         } else if (!strcasecmp(action, "readfwd")) {
1011                 readloop("readfwd");
1012         } else if (!strcasecmp(action, "headers")) {
1013                 readloop("headers");
1014         } else if (!strcasecmp(action, "display_enter")) {
1015                 display_enter();
1016         } else if (!strcasecmp(action, "post")) {
1017                 post_message();
1018         } else if (!strcasecmp(action, "delete_msg")) {
1019                 delete_msg();
1020         } else if (!strcasecmp(action, "confirm_move_msg")) {
1021                 confirm_move_msg();
1022         } else if (!strcasecmp(action, "move_msg")) {
1023                 move_msg();
1024         } else if (!strcasecmp(action, "userlist")) {
1025                 userlist();
1026         } else if (!strcasecmp(action, "showuser")) {
1027                 showuser();
1028         } else if (!strcasecmp(action, "display_page")) {
1029                 display_page();
1030         } else if (!strcasecmp(action, "page_user")) {
1031                 page_user();
1032         } else if (!strcasecmp(action, "chat")) {
1033                 do_chat();
1034         } else if (!strcasecmp(action, "display_private")) {
1035                 display_private("", 0);
1036         } else if (!strcasecmp(action, "goto_private")) {
1037                 goto_private();
1038         } else if (!strcasecmp(action, "zapped_list")) {
1039                 zapped_list();
1040         } else if (!strcasecmp(action, "display_zap")) {
1041                 display_zap();
1042         } else if (!strcasecmp(action, "zap")) {
1043                 zap();
1044         } else if (!strcasecmp(action, "display_entroom")) {
1045                 display_entroom();
1046         } else if (!strcasecmp(action, "entroom")) {
1047                 entroom();
1048         } else if (!strcasecmp(action, "display_editroom")) {
1049                 display_editroom();
1050         } else if (!strcasecmp(action, "netedit")) {
1051                 netedit();
1052         } else if (!strcasecmp(action, "editroom")) {
1053                 editroom();
1054         } else if (!strcasecmp(action, "display_whok")) {
1055                 display_whok();
1056         } else if (!strcasecmp(action, "display_editinfo")) {
1057                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1058         } else if (!strcasecmp(action, "editinfo")) {
1059                 save_edit("Room info", "EINF 1", 1);
1060         } else if (!strcasecmp(action, "display_editbio")) {
1061                 sprintf(buf, "RBIO %s", WC->wc_username);
1062                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1063         } else if (!strcasecmp(action, "editbio")) {
1064                 save_edit("Your bio", "EBIO", 0);
1065         } else if (!strcasecmp(action, "confirm_delete_room")) {
1066                 confirm_delete_room();
1067         } else if (!strcasecmp(action, "delete_room")) {
1068                 delete_room();
1069         } else if (!strcasecmp(action, "validate")) {
1070                 validate();
1071         } else if (!strcasecmp(action, "display_editpic")) {
1072                 display_graphics_upload("your photo",
1073                                         "UIMG 0|_userpic_",
1074                                         "/editpic");
1075         } else if (!strcasecmp(action, "editpic")) {
1076                 do_graphics_upload("UIMG 1|_userpic_");
1077         } else if (!strcasecmp(action, "display_editroompic")) {
1078                 display_graphics_upload("the graphic for this room",
1079                                         "UIMG 0|_roompic_",
1080                                         "/editroompic");
1081         } else if (!strcasecmp(action, "editroompic")) {
1082                 do_graphics_upload("UIMG 1|_roompic_");
1083         } else if (!strcasecmp(action, "delete_floor")) {
1084                 delete_floor();
1085         } else if (!strcasecmp(action, "rename_floor")) {
1086                 rename_floor();
1087         } else if (!strcasecmp(action, "create_floor")) {
1088                 create_floor();
1089         } else if (!strcasecmp(action, "display_editfloorpic")) {
1090                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1091                         bstr("which_floor"));
1092                 display_graphics_upload("the graphic for this floor",
1093                                         buf,
1094                                         "/editfloorpic");
1095         } else if (!strcasecmp(action, "editfloorpic")) {
1096                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1097                         bstr("which_floor"));
1098                 do_graphics_upload(buf);
1099         } else if (!strcasecmp(action, "display_reg")) {
1100                 display_reg(0);
1101         } else if (!strcasecmp(action, "display_changepw")) {
1102                 display_changepw();
1103         } else if (!strcasecmp(action, "changepw")) {
1104                 changepw();
1105         } else if (!strcasecmp(action, "display_edit_node")) {
1106                 display_edit_node();
1107         } else if (!strcasecmp(action, "edit_node")) {
1108                 edit_node();
1109         } else if (!strcasecmp(action, "display_netconf")) {
1110                 display_netconf();
1111         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1112                 display_confirm_delete_node();
1113         } else if (!strcasecmp(action, "delete_node")) {
1114                 delete_node();
1115         } else if (!strcasecmp(action, "display_add_node")) {
1116                 display_add_node();
1117         } else if (!strcasecmp(action, "add_node")) {
1118                 add_node();
1119         } else if (!strcasecmp(action, "terminate_session")) {
1120                 slrp_highest();
1121                 terminate_session();
1122         } else if (!strcasecmp(action, "edit_me")) {
1123                 edit_me();
1124         } else if (!strcasecmp(action, "display_siteconfig")) {
1125                 display_siteconfig();
1126         } else if (!strcasecmp(action, "page_popup")) {
1127                 page_popup();
1128         } else if (!strcasecmp(action, "siteconfig")) {
1129                 siteconfig();
1130         } else if (!strcasecmp(action, "display_generic")) {
1131                 display_generic();
1132         } else if (!strcasecmp(action, "do_generic")) {
1133                 do_generic();
1134         } else if (!strcasecmp(action, "display_menubar")) {
1135                 display_menubar(1);
1136         } else if (!strcasecmp(action, "output_mimepart")) {
1137                 output_mimepart();
1138         } else if (!strcasecmp(action, "edit_vcard")) {
1139                 edit_vcard();
1140         } else if (!strcasecmp(action, "submit_vcard")) {
1141                 submit_vcard();
1142         } else if (!strcasecmp(action, "select_user_to_edit")) {
1143                 select_user_to_edit(NULL, NULL);
1144         } else if (!strcasecmp(action, "display_edituser")) {
1145                 display_edituser(NULL);
1146         } else if (!strcasecmp(action, "edituser")) {
1147                 edituser();
1148         } else if (!strcasecmp(action, "create_user")) {
1149                 create_user();
1150         } else if (!strcasecmp(action, "changeview")) {
1151                 change_view();
1152         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1153                 do_stuff_to_msgs();
1154         } else if (!strcasecmp(action, "change_start_page")) {
1155                 change_start_page();
1156         } else if (!strcasecmp(action, "display_floorconfig")) {
1157                 display_floorconfig(NULL);
1158         } else if (!strcasecmp(action, "toggle_self_service")) {
1159                 toggle_self_service();
1160 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1161         } else if (!strcasecmp(action, "display_edit_task")) {
1162                 display_edit_task();
1163         } else if (!strcasecmp(action, "save_task")) {
1164                 save_task();
1165         } else if (!strcasecmp(action, "display_edit_event")) {
1166                 display_edit_event();
1167         } else if (!strcasecmp(action, "save_event")) {
1168                 save_event();
1169         } else if (!strcasecmp(action, "respond_to_request")) {
1170                 respond_to_request();
1171         } else if (!strcasecmp(action, "handle_rsvp")) {
1172                 handle_rsvp();
1173 #endif
1174         } else if (!strcasecmp(action, "summary")) {
1175                 summary();
1176         } else if (!strcasecmp(action, "iconbar")) {
1177                 do_iconbar();
1178         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1179                 display_customize_iconbar();
1180         } else if (!strcasecmp(action, "commit_iconbar")) {
1181                 commit_iconbar();
1182         } else if (!strcasecmp(action, "diagnostics")) {
1183                 output_headers(1);
1184
1185                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1186                 wprintf("Command: <BR><PRE>\n");
1187                 escputs(cmd);
1188                 wprintf("</PRE><HR>\n");
1189                 wprintf("Variables: <BR><PRE>\n");
1190                 dump_vars();
1191                 wprintf("</PRE><HR>\n");
1192                 wDumpContent(1);
1193         }
1194         /* When all else fais, display the main menu. */
1195         else {
1196                 display_main_menu();
1197         }
1198
1199 SKIP_ALL_THIS_CRAP:
1200         fflush(stdout);
1201         if (content != NULL) {
1202                 free(content);
1203                 content = NULL;
1204         }
1205         free_urls();
1206         if (WC->upload_length > 0) {
1207                 free(WC->upload);
1208                 WC->upload_length = 0;
1209         }
1210
1211 }