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 the & sign */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if (!strncmp(ptr, "&", 1)) {
 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[1024];
 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 (WC->fake_frames) {
 178                 wprintf("</TABLE>\n");
 179                 WC->fake_frames = 0;
 180         }
 181
 182         if (print_standard_html_footer) {
 183                 if (print_standard_html_footer != 2) {
 184                         wprintf("<BR>");
 185                 }
 186                 wprintf("</BODY></HTML>\n");
 187         }
 188
 189
 190 }
 191
 192
 193 /*
 194  * Copy a string, escaping characters which have meaning in HTML.  If
 195  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 196  */
 197 void stresc(char *target, char *strbuf, int nbsp)
 198 {
 199         int a;
 200         strcpy(target, "");
 201
 202         for (a = 0; a < strlen(strbuf); ++a) {
 203                 if (strbuf[a] == '<')
 204                         strcat(target, "&lt;");
 205                 else if (strbuf[a] == '>')
 206                         strcat(target, "&gt;");
 207                 else if (strbuf[a] == '&')
 208                         strcat(target, "&amp;");
 209                 else if (strbuf[a] == '\"')
 210                         strcat(target, "&quot;");
 211                 else if (strbuf[a] == '\'')
 212                         strcat(target, "&#39;");
 213                 else if (strbuf[a] == LB)
 214                         strcat(target, "<");
 215                 else if (strbuf[a] == RB)
 216                         strcat(target, ">");
 217                 else if (strbuf[a] == QU)
 218                         strcat(target, "\"");
 219                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 220                         strcat(target, "&nbsp;");
 221                 } else {
 222                         strncat(target, &strbuf[a], 1);
 223                 }
 224         }
 225 }
 226
 227 void escputs1(char *strbuf, int nbsp)
 228 {
 229         char buf[1024];
 230         stresc(buf, strbuf, nbsp);
 231         wprintf("%s", buf);
 232 }
 233
 234 void escputs(char *strbuf)
 235 {
 236         escputs1(strbuf, 0);
 237 }
 238
 239 /*
 240  * Escape a string for feeding out as a URL.
 241  * Returns a pointer to a buffer that must be freed by the caller!
 242  */
 243 void urlesc(char *outbuf, char *strbuf)
 244 {
 245         int a, b, c;
 246         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 247
 248         strcpy(outbuf, "");
 249
 250         for (a = 0; a < strlen(strbuf); ++a) {
 251                 c = 0;
 252                 for (b = 0; b < strlen(ec); ++b) {
 253                         if (strbuf[a] == ec[b])
 254                                 c = 1;
 255                 }
 256                 b = strlen(outbuf);
 257                 if (c == 1)
 258                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 259                 else
 260                         sprintf(&outbuf[b], "%c", strbuf[a]);
 261         }
 262 }
 263
 264 void urlescputs(char *strbuf)
 265 {
 266         char outbuf[SIZ];
 267
 268         urlesc(outbuf, strbuf);
 269         wprintf("%s", outbuf);
 270 }
 271
 272
 273
 274
 275 /*
 276  * Output all that important stuff that the browser will want to see
 277  *
 278  * control codes:
 279  *
 280  * Bits 0 and 1:
 281  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 282  * 1 = HTTP headers plus the room banner
 283  * 2 = HTTP headers required to terminate the session (unset cookies)
 284  * 3 = HTTP and HTML headers, but no room banner
 285  *
 286  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 287  *
 288  * Bit 3: suppress check for express messages
 289  */
 290 void output_headers(int controlcode)
 291 {
 292         char cookie[SIZ];
 293         int print_standard_html_head = 0;
 294         int refresh30 = 0;
 295         int suppress_check = 0;
 296         char httpnow[SIZ];
 297         static int pageseq = 0;
 298         print_standard_html_head        =       controlcode & 0x03;
 299         refresh30                       =       ((controlcode & 0x04) >> 2);
 300         suppress_check                  =       ((controlcode & 0x08) >> 3);
 301
 302         wprintf("HTTP/1.0 200 OK\n");
 303
 304         httpdate(httpnow, time(NULL));
 305
 306         if (print_standard_html_head > 0) {
 307                 wprintf("Content-type: text/html\n"
 308                         "Server: %s\n", SERVER
 309                 );
 310                 wprintf("Connection: close\n"
 311                         "Pragma: no-cache\n"
 312                         "Cache-Control: no-store\n"
 313                 );
 314         }
 315         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 316                         WC->wc_password, WC->wc_roomname);
 317         if (print_standard_html_head == 2) {
 318                 wprintf("Set-cookie: webcit=%s\n", unset);
 319         } else {
 320                 wprintf("Set-cookie: webcit=%s\n", cookie);
 321                 if (server_cookie != NULL) {
 322                         wprintf("%s\n", server_cookie);
 323                 }
 324         }
 325
 326         if (print_standard_html_head > 0) {
 327                 wprintf("\n");
 328
 329                 wprintf("<HTML><HEAD><TITLE>");
 330                 escputs(serv_info.serv_humannode);
 331                 wprintf("</TITLE>\n"
 332                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 333                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 334                         "<META NAME=\"MSSmartTagsPreventParsing\" CONTENT=\"TRUE\">\n");
 335                 if (refresh30) wprintf(
 336                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 337                 else wprintf(
 338                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 339                 wprintf("</HEAD>\n");
 340
 341                 /* script for checking for pages (not always launched) */
 342                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 343                 wprintf("function launch_page_popup() {\n");
 344                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 345                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 346                         "scrollbars=yes,resizable=no,height=250,width=400');\n",
 347                         ++pageseq);
 348                 wprintf("}\n");
 349                 wprintf("</SCRIPT>\n");
 350                 /* end script */
 351
 352                 /* (JavaScript keyboard-based navigation would go here) */
 353
 354                 if (!suppress_check) if (WC->HaveExpressMessages) {
 355                         svprintf("extrabodyparms", WCS_STRING, "%s",
 356                                 "onload=\"launch_page_popup()\" ");
 357                         WC->HaveExpressMessages = 0;
 358                 }
 359                 do_template("background");
 360                 clear_local_substs();
 361
 362         if (print_standard_html_head == 1) {
 363                 wprintf("<A NAME=\"TheTop\"></A>");
 364
 365                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 366                         "<TD>\n");
 367
 368                 embed_room_banner(NULL);
 369
 370                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 371
 372                 WC->fake_frames = 1;
 373                 }
 374         }
 375 }
 376
 377
 378 /*
 379  *
 380  */
 381 void http_redirect(char *whichpage) {
 382         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 383         wprintf("Location: %s\n", whichpage);
 384         wprintf("URI: %s\n", whichpage);
 385         wprintf("Content-type: text/html\n\n");
 386         wprintf("<html><body>\n");
 387         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 388                 whichpage);
 389         wprintf("</body></html>\n");
 390 }
 391
 392
 393
 394 void check_for_express_messages()
 395 {
 396         char buf[SIZ];
 397
 398         serv_puts("NOOP");
 399         serv_gets(buf);
 400         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 401 }
 402
 403
 404
 405
 406 /*
 407  * Output a piece of content to the web browser
 408  */
 409 void http_transmit_thing(char *thing, size_t length, char *content_type) {
 410         output_headers(0);
 411         wprintf("Content-type: %s\n"
 412                 "Content-length: %ld\n"
 413                 "Server: %s\n"
 414                 "Connection: close\n"
 415                 "\n",
 416                 content_type,
 417                 (long) length,
 418                 SERVER
 419         );
 420         write(WC->http_sock, thing, (size_t)length);
 421 }
 422
 423
 424
 425
 426 void output_static(char *what)
 427 {
 428         char buf[4096];
 429         FILE *fp;
 430         struct stat statbuf;
 431         off_t bytes;
 432         char *bigbuffer;
 433         char content_type[SIZ];
 434
 435         sprintf(buf, "static/%s", what);
 436         fp = fopen(buf, "rb");
 437         if (fp == NULL) {
 438                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 439                 wprintf("Content-Type: text/plain\n");
 440                 wprintf("\n");
 441                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 442         } else {
 443                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 444                         strcpy(content_type, "image/gif");
 445                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 446                         strcpy(content_type, "text/plain");
 447                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 448                         strcpy(content_type, "text/css");
 449                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 450                         strcpy(content_type, "image/jpeg");
 451                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 452                         strcpy(content_type, "image/png");
 453                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 454                         strcpy(content_type, "text/html");
 455                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 456                         strcpy(content_type, "text/vnd.wap.wml");
 457                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 458                         strcpy(content_type, "text/vnd.wap.wmlscript");
 459                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 460                         strcpy(content_type, "application/vnd.wap.wmlc");
 461                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 462                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 463                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 464                         wprintf("Content-type: image/vnd.wap.wbmp");
 465                 else
 466                         wprintf("Content-type: application/octet-stream");
 467
 468                 fstat(fileno(fp), &statbuf);
 469                 bytes = statbuf.st_size;
 470                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 471                 bigbuffer = malloc(bytes);
 472                 fread(bigbuffer, bytes, 1, fp);
 473                 fclose(fp);
 474
 475                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type);
 476                 free(bigbuffer);
 477         }
 478         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 479                 end_webcit_session();
 480         }
 481 }
 482
 483
 484 /*
 485  * When the browser requests an image file from the Citadel server,
 486  * this function is called to transmit it.
 487  */
 488 void output_image()
 489 {
 490         char buf[SIZ];
 491         char *xferbuf = NULL;
 492         off_t bytes;
 493         off_t thisblock;
 494         off_t accomplished = 0L;
 495
 496         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 497         serv_gets(buf);
 498         if (buf[0] == '2') {
 499                 bytes = extract_long(&buf[4], 0);
 500                 xferbuf = malloc(bytes);
 501
 502                 /* Read it from the server */
 503                 while (bytes > (off_t) 0) {
 504                         thisblock = 4096;
 505                         if (thisblock > bytes) {
 506                                 thisblock = bytes;
 507                         }
 508                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 509                         serv_gets(buf);
 510                         if (buf[0] == '6') {
 511                                 thisblock = extract_long(&buf[4], 0);
 512                                 serv_read(&xferbuf[accomplished],
 513                                         (int) thisblock);
 514                         }
 515                         else {
 516                                 memset(&xferbuf[accomplished], 0, thisblock);
 517                         }
 518                         bytes = bytes - thisblock;
 519                         accomplished += thisblock;
 520                 }
 521                 serv_puts("CLOS");
 522                 serv_gets(buf);
 523
 524                 /* Write it to the browser */
 525                 http_transmit_thing(xferbuf, (size_t)accomplished,
 526                                         "image/gif");
 527
 528         } else {
 529                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 530                 output_headers(0);
 531                 wprintf("Content-Type: text/plain\n"
 532                         "\n"
 533                         "Error retrieving image: %s\n",
 534                         &buf[4]
 535                 );
 536         }
 537
 538         if (xferbuf) {
 539                 free(xferbuf);
 540         }
 541
 542
 543 }
 544
 545 /*
 546  */
 547 void output_mimepart()
 548 {
 549         char buf[SIZ];
 550         char xferbuf[4096];
 551         off_t bytes;
 552         off_t thisblock;
 553         off_t accomplished = 0L;
 554         char content_type[SIZ];
 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                 extract(content_type, &buf[4], 3);
 561                 output_headers(0);
 562                 wprintf("Content-type: %s\n", content_type);
 563                 wprintf("Content-length: %ld\n", (long) bytes);
 564                 wprintf("\n");
 565
 566                 while (bytes > (off_t) 0) {
 567                         thisblock = (off_t) sizeof(xferbuf);
 568                         if (thisblock > bytes) {
 569                                 thisblock = bytes;
 570                         }
 571                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 572                         serv_gets(buf);
 573                         if (buf[0] == '6') {
 574                                 thisblock = extract_long(&buf[4], 0);
 575                                 serv_read(xferbuf, (int) thisblock);
 576                         }
 577                         else {
 578                                 memset(xferbuf, 0, thisblock);
 579                         }
 580                         write(WC->http_sock, xferbuf, thisblock);
 581                         bytes = bytes - thisblock;
 582                         accomplished = accomplished + thisblock;
 583                 }
 584                 serv_puts("CLOS");
 585                 serv_gets(buf);
 586         } else {
 587                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 588                 output_headers(0);
 589                 wprintf("Content-Type: text/plain\n");
 590                 wprintf("\n");
 591                 wprintf("Error retrieving part: %s\n", &buf[4]);
 592         }
 593
 594 }
 595
 596
 597 /*
 598  */
 599 char *load_mimepart(long msgnum, char *partnum)
 600 {
 601         char buf[SIZ];
 602         off_t bytes;
 603         off_t thisblock;
 604         off_t accomplished = 0L;
 605         char content_type[SIZ];
 606         char *content;
 607
 608         serv_printf("OPNA %ld|%s", msgnum, partnum);
 609         serv_gets(buf);
 610         if (buf[0] == '2') {
 611                 bytes = extract_long(&buf[4], 0);
 612                 extract(content_type, &buf[4], 3);
 613
 614                 content = malloc(bytes + 1);
 615
 616                 while (bytes > (off_t) 0) {
 617                         thisblock = bytes;
 618                         if (thisblock > 4096L) {
 619                                 thisblock = 4096L;
 620                         }
 621                         if (thisblock > bytes) {
 622                                 thisblock = bytes;
 623                         }
 624                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 625                         serv_gets(buf);
 626                         if (buf[0] == '6') {
 627                                 thisblock = extract_long(&buf[4], 0);
 628                                 serv_read(&content[accomplished], (int) thisblock);
 629                         }
 630                         else {
 631                                 memset(&content[accomplished], 0, thisblock);
 632                         }
 633                         bytes = bytes - thisblock;
 634                         accomplished = accomplished + thisblock;
 635                 }
 636                 serv_puts("CLOS");
 637                 serv_gets(buf);
 638                 content[accomplished] = 0;      /* null terminate for good measure */
 639                 return(content);
 640         }
 641         else {
 642                 return(NULL);
 643         }
 644
 645 }
 646
 647
 648 /*
 649  * Convenience functions to display a page containing only a string
 650  */
 651 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 652 {
 653         wprintf("HTTP/1.0 200 OK\n");
 654         output_headers(1);
 655         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 656         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 657         wprintf("<B>%s</B>\n", titlebarmsg);
 658         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 659         escputs(messagetext);
 660
 661         wprintf("<HR>\n");
 662         wDumpContent(1);
 663 }
 664
 665
 666 /*
 667  * Display a blank page.
 668  */
 669 void blank_page(void) {
 670         output_headers(7);
 671         wDumpContent(2);
 672 }
 673
 674
 675
 676
 677 /*
 678  * Offer to make any page the user's "start page."
 679  */
 680 void offer_start_page(void) {
 681         wprintf("<A HREF=\"/change_start_page?startpage=");
 682         urlescputs(WC->this_page);
 683         wprintf("\">"
 684                 "<FONT SIZE=-2 COLOR=#AAAAAA>Make this my start page</FONT>"
 685                 "</A>"
 686         );
 687 }
 688
 689
 690 /*
 691  * Change the user's start page
 692  */
 693 void change_start_page(void) {
 694
 695         if (bstr("startpage") == NULL) {
 696                 display_error("startpage set to null");
 697                 return;
 698         }
 699
 700         set_preference("startpage", bstr("startpage"));
 701
 702         output_headers(3);
 703         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=000077><TR><TD>");
 704         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 705         wprintf("<B>New start page</B>\n");
 706         wprintf("</FONT></TD></TR></TABLE>\n");
 707
 708         wprintf("<CENTER>"
 709                 "<font size=+2>Your start page has been changed.</font>"
 710                 "<BR><BR>\n"
 711                 "<I>(Note: this does not change your browser's home page. "
 712                 "It changes the page you begin on when you log on to ");
 713         escputs(serv_info.serv_humannode);
 714         wprintf(".)</I><BR><BR>"
 715                 "<a href = \"javascript:history.back()\">Back...</a>"
 716                 "</CENTER>");
 717
 718         wDumpContent(1);
 719 }
 720
 721
 722
 723
 724 void display_error(char *errormessage)
 725 {
 726         convenience_page("770000", "Error", errormessage);
 727 }
 728
 729 void display_success(char *successmessage)
 730 {
 731         convenience_page("007700", "OK", successmessage);
 732 }
 733
 734
 735
 736 void extract_action(char *actbuf, char *cmdbuf)
 737 {
 738         int i;
 739
 740         strcpy(actbuf, cmdbuf);
 741         if (!strncasecmp(actbuf, "GET /", 5))
 742                 strcpy(actbuf, &actbuf[5]);
 743         if (!strncasecmp(actbuf, "PUT /", 5))
 744                 strcpy(actbuf, &actbuf[5]);
 745         if (!strncasecmp(actbuf, "POST /", 6))
 746                 strcpy(actbuf, &actbuf[6]);
 747
 748         for (i = 0; i < strlen(actbuf); ++i) {
 749                 if (actbuf[i] == ' ') {
 750                         actbuf[i] = 0;
 751                         i = 0;
 752                 }
 753                 if (actbuf[i] == '/') {
 754                         actbuf[i] = 0;
 755                         i = 0;
 756                 }
 757                 if (actbuf[i] == '?') {
 758                         actbuf[i] = 0;
 759                         i = 0;
 760                 }
 761                 if (actbuf[i] == '&') {
 762                         actbuf[i] = 0;
 763                         i = 0;
 764                 }
 765         }
 766 }
 767
 768
 769 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 770                         void *content, char *cbtype, size_t length,
 771                         char *encoding, void *userdata)
 772 {
 773
 774         lprintf(5, "UPLOAD HANDLER CALLED\n");
 775         lprintf(5, "    name = %s\n", name);
 776         lprintf(5, "filename = %s\n", filename);
 777         lprintf(5, "encoding = %s\n", encoding);
 778         lprintf(5, "    type = %s\n", cbtype);
 779         lprintf(5, "  length = %ld\n", (long)length);
 780
 781         if (length > 0) {
 782                 WC->upload = malloc(length);
 783                 if (WC->upload != NULL) {
 784                         WC->upload_length = length;
 785                         memcpy(WC->upload, content, length);
 786                 }
 787                 else {
 788                         lprintf(9, "malloc() failed: %s\n",
 789                                 strerror(errno));
 790                 }
 791         }
 792 }
 793
 794
 795
 796
 797 /*
 798  * Entry point for WebCit transaction
 799  */
 800 void session_loop(struct httprequest *req)
 801 {
 802         char cmd[SIZ];
 803         char action[SIZ];
 804         char buf[SIZ];
 805         int a, b;
 806         int ContentLength = 0;
 807         int BytesRead;
 808         char ContentType[512];
 809         char *content;
 810         char *content_end;
 811         struct httprequest *hptr;
 812         char browser_host[SIZ];
 813         char user_agent[SIZ];
 814
 815         /* We stuff these with the values coming from the client cookies,
 816          * so we can use them to reconnect a timed out session if we have to.
 817          */
 818         char c_host[SIZ];
 819         char c_port[SIZ];
 820         char c_username[SIZ];
 821         char c_password[SIZ];
 822         char c_roomname[SIZ];
 823         char cookie[SIZ];
 824
 825         strcpy(c_host, defaulthost);
 826         strcpy(c_port, defaultport);
 827         strcpy(c_username, "");
 828         strcpy(c_password, "");
 829         strcpy(c_roomname, "");
 830
 831         WC->upload_length = 0;
 832         WC->upload = NULL;
 833
 834         WC->is_wap = 0;
 835
 836         hptr = req;
 837         if (hptr == NULL) return;
 838
 839         strcpy(cmd, hptr->line);
 840         hptr = hptr->next;
 841         extract_action(action, cmd);
 842
 843         while (hptr != NULL) {
 844                 strcpy(buf, hptr->line);
 845                 hptr = hptr->next;
 846
 847                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 848                         strcpy(cookie, &buf[15]);
 849                         cookie_to_stuff(cookie, NULL,
 850                                       c_username, c_password, c_roomname);
 851                 }
 852                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 853                         ContentLength = atoi(&buf[16]);
 854                 }
 855                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 856                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 857                 }
 858                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 859                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 860                 }
 861                 else if (!strncasecmp(buf, "Host: ", 6)) {
 862                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 863                 }
 864                 /* Only WAP gateways explicitly name this content-type */
 865                 else if (strstr(buf, "text/vnd.wap.wml")) {
 866                         WC->is_wap = 1;
 867                 }
 868         }
 869
 870         if (ContentLength > 0) {
 871                 lprintf(5, "Content length: %d\n", ContentLength);
 872                 content = malloc(ContentLength + 1);
 873                 memset(content, 0, ContentLength+1);
 874                 BytesRead = 0;
 875
 876                 while (BytesRead < ContentLength) {
 877                         a=read(WC->http_sock, &content[BytesRead],
 878                                 ContentLength - BytesRead);
 879                         if (a <= 0) BytesRead = ContentLength;
 880                         else BytesRead += a;
 881                 }
 882
 883                 if (!strncasecmp(ContentType,
 884                               "application/x-www-form-urlencoded", 33)) {
 885                         addurls(content);
 886                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 887                         content_end = content + ContentLength;
 888                         mime_parser(content, content_end, *upload_handler,
 889                                         NULL, NULL, NULL, 0);
 890                 }
 891         } else {
 892                 content = NULL;
 893         }
 894
 895         /* make a note of where we are in case the user wants to save it */
 896         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 897         remove_token(WC->this_page, 2, ' ');
 898         remove_token(WC->this_page, 0, ' ');
 899
 900         /* If there are variables in the URL, we must grab them now */
 901         for (a = 0; a < strlen(cmd); ++a) {
 902                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 903                         for (b = a; b < strlen(cmd); ++b)
 904                                 if (isspace(cmd[b]))
 905                                         cmd[b] = 0;
 906                         addurls(&cmd[a + 1]);
 907                         cmd[a] = 0;
 908                 }
 909         }
 910
 911         /*
 912          * If we're not connected to a Citadel server, try to hook up the
 913          * connection now.  Preference is given to the host and port specified
 914          * by browser cookies, if cookies have been supplied.
 915          */
 916         if (!WC->connected) {
 917                 if (strlen(bstr("host")) > 0)
 918                         strcpy(c_host, bstr("host"));
 919                 if (strlen(bstr("port")) > 0)
 920                         strcpy(c_port, bstr("port"));
 921
 922                 if (!strcasecmp(c_host, "uds")) {
 923                         /* unix domain socket */
 924                         sprintf(buf, "%s/citadel.socket", c_port);
 925                         WC->serv_sock = uds_connectsock(buf);
 926                 }
 927                 else {
 928                         /* tcp socket */
 929                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 930                 }
 931
 932                 if (WC->serv_sock < 0) {
 933                         do_logout();
 934                         goto SKIP_ALL_THIS_CRAP;
 935                 }
 936                 else {
 937                         WC->connected = 1;
 938                         serv_gets(buf); /* get the server welcome message */
 939                         locate_host(browser_host, WC->http_sock);
 940                         get_serv_info(browser_host, user_agent);
 941                 }
 942         }
 943
 944         /*
 945          * Functions which can be performed without logging in
 946          */
 947         if (!strcasecmp(action, "listsub")) {
 948                 do_listsub();
 949                 goto SKIP_ALL_THIS_CRAP;
 950         }
 951
 952         check_for_express_messages();
 953
 954         /*
 955          * If we're not logged in, but we have username and password cookies
 956          * supplied by the browser, try using them to log in.
 957          */
 958         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 959                 serv_printf("USER %s", c_username);
 960                 serv_gets(buf);
 961                 if (buf[0] == '3') {
 962                         serv_printf("PASS %s", c_password);
 963                         serv_gets(buf);
 964                         if (buf[0] == '2') {
 965                                 become_logged_in(c_username, c_password, buf);
 966                         }
 967                 }
 968         }
 969         /*
 970          * If we don't have a current room, but a cookie specifying the
 971          * current room is supplied, make an effort to go there.
 972          */
 973         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 974                 serv_printf("GOTO %s", c_roomname);
 975                 serv_gets(buf);
 976                 if (buf[0] == '2') {
 977                         strcpy(WC->wc_roomname, c_roomname);
 978                 }
 979         }
 980         if (!strcasecmp(action, "static")) {
 981                 strcpy(buf, &cmd[12]);
 982                 for (a = 0; a < strlen(buf); ++a)
 983                         if (isspace(buf[a]))
 984                                 buf[a] = 0;
 985                 output_static(buf);
 986         } else if (!strcasecmp(action, "image")) {
 987                 output_image();
 988
 989         /*
 990          * All functions handled below this point ... make sure we log in
 991          * before doing anything else!
 992          */
 993         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 994                 do_login();
 995         } else if (!WC->logged_in) {
 996                 display_login(NULL);
 997         }
 998
 999         /*
1000          * Various commands...
1001          */
1002
1003         else if (!strcasecmp(action, "do_welcome")) {
1004                 do_welcome();
1005         } else if (!strcasecmp(action, "blank")) {
1006                 blank_page();
1007         } else if (!strcasecmp(action, "display_main_menu")) {
1008                 display_main_menu();
1009         } else if (!strcasecmp(action, "whobbs")) {
1010                 whobbs();
1011         } else if (!strcasecmp(action, "knrooms")) {
1012                 knrooms();
1013         } else if (!strcasecmp(action, "gotonext")) {
1014                 slrp_highest();
1015                 gotonext();
1016         } else if (!strcasecmp(action, "skip")) {
1017                 gotonext();
1018         } else if (!strcasecmp(action, "ungoto")) {
1019                 ungoto();
1020         } else if (!strcasecmp(action, "dotgoto")) {
1021                 slrp_highest();
1022                 smart_goto(bstr("room"));
1023         } else if (!strcasecmp(action, "dotskip")) {
1024                 smart_goto(bstr("room"));
1025         } else if (!strcasecmp(action, "termquit")) {
1026                 do_logout();
1027         } else if (!strcasecmp(action, "readnew")) {
1028                 readloop("readnew");
1029         } else if (!strcasecmp(action, "readold")) {
1030                 readloop("readold");
1031         } else if (!strcasecmp(action, "readfwd")) {
1032                 readloop("readfwd");
1033         } else if (!strcasecmp(action, "headers")) {
1034                 readloop("headers");
1035         } else if (!strcasecmp(action, "display_enter")) {
1036                 display_enter();
1037         } else if (!strcasecmp(action, "post")) {
1038                 post_message();
1039         } else if (!strcasecmp(action, "delete_msg")) {
1040                 delete_msg();
1041         } else if (!strcasecmp(action, "confirm_move_msg")) {
1042                 confirm_move_msg();
1043         } else if (!strcasecmp(action, "move_msg")) {
1044                 move_msg();
1045         } else if (!strcasecmp(action, "userlist")) {
1046                 userlist();
1047         } else if (!strcasecmp(action, "showuser")) {
1048                 showuser();
1049         } else if (!strcasecmp(action, "display_page")) {
1050                 display_page();
1051         } else if (!strcasecmp(action, "page_user")) {
1052                 page_user();
1053         } else if (!strcasecmp(action, "chat")) {
1054                 do_chat();
1055         } else if (!strcasecmp(action, "display_private")) {
1056                 display_private("", 0);
1057         } else if (!strcasecmp(action, "goto_private")) {
1058                 goto_private();
1059         } else if (!strcasecmp(action, "zapped_list")) {
1060                 zapped_list();
1061         } else if (!strcasecmp(action, "display_zap")) {
1062                 display_zap();
1063         } else if (!strcasecmp(action, "zap")) {
1064                 zap();
1065         } else if (!strcasecmp(action, "display_entroom")) {
1066                 display_entroom();
1067         } else if (!strcasecmp(action, "entroom")) {
1068                 entroom();
1069         } else if (!strcasecmp(action, "display_editroom")) {
1070                 display_editroom();
1071         } else if (!strcasecmp(action, "netedit")) {
1072                 netedit();
1073         } else if (!strcasecmp(action, "editroom")) {
1074                 editroom();
1075         } else if (!strcasecmp(action, "display_whok")) {
1076                 display_whok();
1077         } else if (!strcasecmp(action, "display_editinfo")) {
1078                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
1079         } else if (!strcasecmp(action, "editinfo")) {
1080                 save_edit("Room info", "EINF 1", 1);
1081         } else if (!strcasecmp(action, "display_editbio")) {
1082                 sprintf(buf, "RBIO %s", WC->wc_username);
1083                 display_edit("Your bio", "NOOP", buf, "editbio");
1084         } else if (!strcasecmp(action, "editbio")) {
1085                 save_edit("Your bio", "EBIO", 0);
1086         } else if (!strcasecmp(action, "confirm_delete_room")) {
1087                 confirm_delete_room();
1088         } else if (!strcasecmp(action, "delete_room")) {
1089                 delete_room();
1090         } else if (!strcasecmp(action, "validate")) {
1091                 validate();
1092         } else if (!strcasecmp(action, "display_editpic")) {
1093                 display_graphics_upload("your photo",
1094                                         "UIMG 0|_userpic_",
1095                                         "/editpic");
1096         } else if (!strcasecmp(action, "editpic")) {
1097                 do_graphics_upload("UIMG 1|_userpic_");
1098         } else if (!strcasecmp(action, "display_editroompic")) {
1099                 display_graphics_upload("the graphic for this room",
1100                                         "UIMG 0|_roompic_",
1101                                         "/editroompic");
1102         } else if (!strcasecmp(action, "editroompic")) {
1103                 do_graphics_upload("UIMG 1|_roompic_");
1104         } else if (!strcasecmp(action, "delete_floor")) {
1105                 delete_floor();
1106         } else if (!strcasecmp(action, "rename_floor")) {
1107                 rename_floor();
1108         } else if (!strcasecmp(action, "create_floor")) {
1109                 create_floor();
1110         } else if (!strcasecmp(action, "display_editfloorpic")) {
1111                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1112                         bstr("which_floor"));
1113                 display_graphics_upload("the graphic for this floor",
1114                                         buf,
1115                                         "/editfloorpic");
1116         } else if (!strcasecmp(action, "editfloorpic")) {
1117                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1118                         bstr("which_floor"));
1119                 do_graphics_upload(buf);
1120         } else if (!strcasecmp(action, "display_reg")) {
1121                 display_reg(0);
1122         } else if (!strcasecmp(action, "register")) {
1123                 register_user();
1124         } else if (!strcasecmp(action, "display_changepw")) {
1125                 display_changepw();
1126         } else if (!strcasecmp(action, "changepw")) {
1127                 changepw();
1128         } else if (!strcasecmp(action, "display_edit_node")) {
1129                 display_edit_node();
1130         } else if (!strcasecmp(action, "edit_node")) {
1131                 edit_node();
1132         } else if (!strcasecmp(action, "display_netconf")) {
1133                 display_netconf();
1134         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1135                 display_confirm_delete_node();
1136         } else if (!strcasecmp(action, "delete_node")) {
1137                 delete_node();
1138         } else if (!strcasecmp(action, "display_add_node")) {
1139                 display_add_node();
1140         } else if (!strcasecmp(action, "add_node")) {
1141                 add_node();
1142         } else if (!strcasecmp(action, "terminate_session")) {
1143                 slrp_highest();
1144                 terminate_session();
1145         } else if (!strcasecmp(action, "edit_me")) {
1146                 edit_me();
1147         } else if (!strcasecmp(action, "display_siteconfig")) {
1148                 display_siteconfig();
1149         } else if (!strcasecmp(action, "page_popup")) {
1150                 page_popup();
1151         } else if (!strcasecmp(action, "siteconfig")) {
1152                 siteconfig();
1153         } else if (!strcasecmp(action, "display_generic")) {
1154                 display_generic();
1155         } else if (!strcasecmp(action, "do_generic")) {
1156                 do_generic();
1157         } else if (!strcasecmp(action, "display_menubar")) {
1158                 display_menubar(1);
1159         } else if (!strcasecmp(action, "output_mimepart")) {
1160                 output_mimepart();
1161         } else if (!strcasecmp(action, "edit_vcard")) {
1162                 edit_vcard();
1163         } else if (!strcasecmp(action, "submit_vcard")) {
1164                 submit_vcard();
1165         } else if (!strcasecmp(action, "select_user_to_edit")) {
1166                 select_user_to_edit(NULL, NULL);
1167         } else if (!strcasecmp(action, "display_edituser")) {
1168                 display_edituser(NULL);
1169         } else if (!strcasecmp(action, "edituser")) {
1170                 edituser();
1171         } else if (!strcasecmp(action, "create_user")) {
1172                 create_user();
1173         } else if (!strcasecmp(action, "changeview")) {
1174                 change_view();
1175         } else if (!strcasecmp(action, "folders")) {
1176                 folders();
1177         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1178                 do_stuff_to_msgs();
1179         } else if (!strcasecmp(action, "change_start_page")) {
1180                 change_start_page();
1181         } else if (!strcasecmp(action, "display_floorconfig")) {
1182                 display_floorconfig(NULL);
1183         } else if (!strcasecmp(action, "toggle_self_service")) {
1184                 toggle_self_service();
1185 #ifdef HAVE_ICAL_H
1186         } else if (!strcasecmp(action, "display_edit_task")) {
1187                 display_edit_task();
1188         } else if (!strcasecmp(action, "save_task")) {
1189                 save_task();
1190         } else if (!strcasecmp(action, "display_edit_event")) {
1191                 display_edit_event();
1192         } else if (!strcasecmp(action, "save_event")) {
1193                 save_event();
1194 #endif
1195         } else if (!strcasecmp(action, "summary")) {
1196                 summary();
1197         } else if (!strcasecmp(action, "diagnostics")) {
1198                 output_headers(1);
1199
1200                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1201                 wprintf("Command: <BR><PRE>\n");
1202                 escputs(cmd);
1203                 wprintf("</PRE><HR>\n");
1204                 wprintf("Variables: <BR><PRE>\n");
1205                 dump_vars();
1206                 wprintf("</PRE><HR>\n");
1207                 wDumpContent(1);
1208         }
1209         /* When all else fais, display the main menu. */
1210         else {
1211                 display_main_menu();
1212         }
1213
1214 SKIP_ALL_THIS_CRAP:
1215         fflush(stdout);
1216         if (content != NULL) {
1217                 free(content);
1218                 content = NULL;
1219         }
1220         free_urls();
1221         if (WC->upload_length > 0) {
1222                 free(WC->upload);
1223                 WC->upload_length = 0;
1224         }
1225
1226 }