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[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         static int pageseq = 0;
 292         print_standard_html_head        =       controlcode & 0x03;
 293         refresh30                       =       ((controlcode & 0x04) >> 2);
 294         suppress_check                  =       ((controlcode & 0x08) >> 3);
 295         cache                           =       ((controlcode & 0x10) >> 4);
 296
 297         wprintf("HTTP/1.0 200 OK\n");
 298
 299         httpdate(httpnow, time(NULL));
 300
 301         if (print_standard_html_head > 0) {
 302                 wprintf("Content-type: text/html\n"
 303                         "Server: %s\n", SERVER
 304                 );
 305                 if (!cache)
 306                         wprintf("Connection: close\n"
 307                                 "Pragma: no-cache\n"
 308                                 "Cache-Control: no-store\n"
 309                         );
 310         }
 311
 312         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 313                         WC->wc_password, WC->wc_roomname);
 314
 315         if (print_standard_html_head == 2) {
 316                 wprintf("Set-cookie: webcit=%s\n", unset);
 317         } else {
 318                 wprintf("Set-cookie: webcit=%s\n", cookie);
 319                 if (server_cookie != NULL) {
 320                         wprintf("%s\n", server_cookie);
 321                 }
 322         }
 323
 324         if (print_standard_html_head > 0) {
 325                 wprintf("\n");
 326
 327                 if (refresh30) svprintf("REFRESHTAG", WCS_STRING,
 328                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 329                 else svprintf("REFRESHTAG", WCS_STRING,
 330                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 331                 /* script for checking for pages (not always launched) */
 332                 svprintf("PAGERSCRIPT", WCS_STRING,
 333                         "<SCRIPT LANGUAGE=\"JavaScript\">\n"
 334                         "function launch_page_popup() {\n"
 335                         "pwin = window.open('/page_popup', 'CitaPage%d', "
 336                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 337                         "scrollbars=yes,resizable=no,height=250,width=400');\n"
 338                         "}\n"
 339                         "</SCRIPT>\n",
 340                         ++pageseq
 341                 );
 342                 /* end script */
 343
 344                 do_template("head");
 345                 clear_local_substs();
 346
 347                 if (!suppress_check) if (WC->HaveExpressMessages) {
 348                         svprintf("extrabodyparms", WCS_STRING, "%s",
 349                                 "onload=\"launch_page_popup()\" ");
 350                         WC->HaveExpressMessages = 0;
 351                 }
 352
 353                 do_template("background");
 354                 clear_local_substs();
 355         }
 356
 357         if (print_standard_html_head == 1) {
 358                 wprintf("<A NAME=\"TheTop\"></A>");
 359                 embed_room_banner(NULL);
 360         }
 361
 362         if (strlen(WC->ImportantMessage) > 0) {
 363                 do_template("beginbox_nt");
 364                 wprintf("<SPAN CLASS=\"errormsg\">"
 365                         "%s</SPAN><BR>\n", WC->ImportantMessage);
 366                 do_template("endbox");
 367                 strcpy(WC->ImportantMessage, "");
 368         }
 369 }
 370
 371
 372 /*
 373  *
 374  */
 375 void http_redirect(char *whichpage) {
 376         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 377         wprintf("Location: %s\n", whichpage);
 378         wprintf("URI: %s\n", whichpage);
 379         wprintf("Content-type: text/html\n\n");
 380         wprintf("<html><body>\n");
 381         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 382                 whichpage);
 383         wprintf("</body></html>\n");
 384 }
 385
 386
 387
 388 void check_for_express_messages()
 389 {
 390         char buf[SIZ];
 391
 392         serv_puts("NOOP");
 393         serv_gets(buf);
 394         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 395 }
 396
 397
 398
 399
 400 /*
 401  * Output a piece of content to the web browser
 402  */
 403 void http_transmit_thing(char *thing, size_t length, char *content_type,
 404                          int is_static) {
 405         output_headers(is_static ? 0x10 : 0x00);
 406         wprintf("Content-type: %s\n"
 407                 "Content-length: %ld\n"
 408                 "Server: %s\n"
 409                 "Connection: close\n"
 410                 "\n",
 411                 content_type,
 412                 (long) length,
 413                 SERVER
 414         );
 415         write(WC->http_sock, thing, (size_t)length);
 416 }
 417
 418
 419
 420
 421 void output_static(char *what)
 422 {
 423         char buf[4096];
 424         FILE *fp;
 425         struct stat statbuf;
 426         off_t bytes;
 427         char *bigbuffer;
 428         char content_type[SIZ];
 429
 430         lprintf(9, "output_static(%s)\n", what);
 431         sprintf(buf, "static/%s", what);
 432         fp = fopen(buf, "rb");
 433         if (fp == NULL) {
 434                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 435                 wprintf("Content-Type: text/plain\n");
 436                 wprintf("\n");
 437                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 438         } else {
 439                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 440                         strcpy(content_type, "image/gif");
 441                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 442                         strcpy(content_type, "text/plain");
 443                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 444                         strcpy(content_type, "text/css");
 445                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 446                         strcpy(content_type, "image/jpeg");
 447                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 448                         strcpy(content_type, "image/png");
 449                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 450                         strcpy(content_type, "text/html");
 451                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 452                         strcpy(content_type, "text/vnd.wap.wml");
 453                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 454                         strcpy(content_type, "text/vnd.wap.wmlscript");
 455                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 456                         strcpy(content_type, "application/vnd.wap.wmlc");
 457                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 458                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 459                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 460                         wprintf("Content-type: image/vnd.wap.wbmp");
 461                 else
 462                         wprintf("Content-type: application/octet-stream");
 463
 464                 fstat(fileno(fp), &statbuf);
 465                 bytes = statbuf.st_size;
 466                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 467                 bigbuffer = malloc(bytes);
 468                 fread(bigbuffer, bytes, 1, fp);
 469                 fclose(fp);
 470
 471                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 472                 free(bigbuffer);
 473         }
 474         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 475                 end_webcit_session();
 476         }
 477 }
 478
 479
 480 /*
 481  * When the browser requests an image file from the Citadel server,
 482  * this function is called to transmit it.
 483  */
 484 void output_image()
 485 {
 486         char buf[SIZ];
 487         char *xferbuf = NULL;
 488         off_t bytes;
 489
 490         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 491         serv_gets(buf);
 492         if (buf[0] == '2') {
 493                 bytes = extract_long(&buf[4], 0);
 494                 xferbuf = malloc(bytes);
 495
 496                 /* Read it from the server */
 497                 read_server_binary(xferbuf, bytes);
 498                 serv_puts("CLOS");
 499                 serv_gets(buf);
 500
 501                 /* Write it to the browser */
 502                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 503                 free(xferbuf);
 504
 505         } else {
 506
 507                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 508                  * when there's no such image on the server.
 509                  */
 510                 output_static("blank.gif");
 511
 512                 /*
 513                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 514                 output_headers(0);
 515                 wprintf("Content-Type: text/plain\n"
 516                         "\n"
 517                         "Error retrieving image: %s\n",
 518                         &buf[4]
 519                 );
 520                 */
 521
 522         }
 523
 524
 525
 526 }
 527
 528 /*
 529  */
 530 void output_mimepart()
 531 {
 532         char buf[SIZ];
 533         off_t bytes;
 534         char content_type[SIZ];
 535         char *content = NULL;
 536
 537         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 538         serv_gets(buf);
 539         if (buf[0] == '2') {
 540                 bytes = extract_long(&buf[4], 0);
 541                 content = malloc(bytes);
 542                 extract(content_type, &buf[4], 3);
 543                 output_headers(0);
 544                 read_server_binary(content, bytes);
 545                 serv_puts("CLOS");
 546                 serv_gets(buf);
 547                 http_transmit_thing(content, bytes, content_type, 0);
 548                 free(content);
 549         } else {
 550                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 551                 output_headers(0);
 552                 wprintf("Content-Type: text/plain\n");
 553                 wprintf("\n");
 554                 wprintf("Error retrieving part: %s\n", &buf[4]);
 555         }
 556
 557 }
 558
 559
 560 /*
 561  */
 562 char *load_mimepart(long msgnum, char *partnum)
 563 {
 564         char buf[SIZ];
 565         off_t bytes;
 566         char content_type[SIZ];
 567         char *content;
 568
 569         serv_printf("OPNA %ld|%s", msgnum, partnum);
 570         serv_gets(buf);
 571         if (buf[0] == '2') {
 572                 bytes = extract_long(&buf[4], 0);
 573                 extract(content_type, &buf[4], 3);
 574
 575                 content = malloc(bytes + 1);
 576                 read_server_binary(content, bytes);
 577
 578                 serv_puts("CLOS");
 579                 serv_gets(buf);
 580                 content[bytes] = 0;     /* null terminate for good measure */
 581                 return(content);
 582         }
 583         else {
 584                 return(NULL);
 585         }
 586
 587 }
 588
 589
 590 /*
 591  * Convenience functions to display a page containing only a string
 592  */
 593 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 594 {
 595         wprintf("HTTP/1.0 200 OK\n");
 596         output_headers(1);
 597         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 598         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 599         wprintf("</TD></TR></TABLE><BR>\n");
 600         escputs(messagetext);
 601
 602         wprintf("<HR>\n");
 603         wDumpContent(1);
 604 }
 605
 606
 607 /*
 608  * Display a blank page.
 609  */
 610 void blank_page(void) {
 611         output_headers(7);
 612         wDumpContent(2);
 613 }
 614
 615
 616 /*
 617  * A template has been requested
 618  */
 619 void url_do_template(void) {
 620         do_template(bstr("template"));
 621 }
 622
 623
 624
 625 /*
 626  * Offer to make any page the user's "start page."
 627  */
 628 void offer_start_page(void) {
 629         wprintf("<A HREF=\"/change_start_page?startpage=");
 630         urlescputs(WC->this_page);
 631         wprintf("\">"
 632                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 633                 "</A>"
 634         );
 635 }
 636
 637
 638 /*
 639  * Change the user's start page
 640  */
 641 void change_start_page(void) {
 642
 643         if (bstr("startpage") == NULL) {
 644                 strcpy(WC->ImportantMessage,
 645                         "startpage set to null");
 646                 display_main_menu();
 647                 return;
 648         }
 649
 650         set_preference("startpage", bstr("startpage"));
 651
 652         output_headers(3);
 653         do_template("newstartpage");
 654         wDumpContent(1);
 655 }
 656
 657
 658
 659
 660 void display_success(char *successmessage)
 661 {
 662         convenience_page("007700", "OK", successmessage);
 663 }
 664
 665
 666
 667 void extract_action(char *actbuf, char *cmdbuf)
 668 {
 669         int i;
 670
 671         strcpy(actbuf, cmdbuf);
 672         if (!strncasecmp(actbuf, "GET /", 5))
 673                 strcpy(actbuf, &actbuf[5]);
 674         if (!strncasecmp(actbuf, "PUT /", 5))
 675                 strcpy(actbuf, &actbuf[5]);
 676         if (!strncasecmp(actbuf, "POST /", 6))
 677                 strcpy(actbuf, &actbuf[6]);
 678
 679         for (i = 0; i < strlen(actbuf); ++i) {
 680                 if (actbuf[i] == ' ') {
 681                         actbuf[i] = 0;
 682                         i = 0;
 683                 }
 684                 if (actbuf[i] == '/') {
 685                         actbuf[i] = 0;
 686                         i = 0;
 687                 }
 688                 if (actbuf[i] == '?') {
 689                         actbuf[i] = 0;
 690                         i = 0;
 691                 }
 692                 if (actbuf[i] == '&') {
 693                         actbuf[i] = 0;
 694                         i = 0;
 695                 }
 696         }
 697 }
 698
 699
 700 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 701                         void *content, char *cbtype, size_t length,
 702                         char *encoding, void *userdata)
 703 {
 704         struct urlcontent *u;
 705
 706         /* Form fields */
 707         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 708                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 709                 u->next = WC->urlstrings;
 710                 WC->urlstrings = u;
 711                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 712                 u->url_data = malloc(length + 1);
 713                 memcpy(u->url_data, content, length);
 714                 u->url_data[length] = 0;
 715         }
 716
 717         /* Uploaded files */
 718         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 719                 WC->upload = malloc(length);
 720                 if (WC->upload != NULL) {
 721                         WC->upload_length = length;
 722                         safestrncpy(WC->upload_filename, filename,
 723                                         sizeof(WC->upload_filename));
 724                         safestrncpy(WC->upload_content_type, cbtype,
 725                                         sizeof(WC->upload_content_type));
 726                         memcpy(WC->upload, content, length);
 727                 }
 728                 else {
 729                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 730                 }
 731         }
 732
 733 }
 734
 735
 736
 737
 738 /*
 739  * Entry point for WebCit transaction
 740  */
 741 void session_loop(struct httprequest *req)
 742 {
 743         char cmd[SIZ];
 744         char action[SIZ];
 745         char buf[SIZ];
 746         int a, b;
 747         int ContentLength = 0;
 748         int BytesRead;
 749         char ContentType[512];
 750         char *content;
 751         char *content_end;
 752         struct httprequest *hptr;
 753         char browser_host[SIZ];
 754         char user_agent[SIZ];
 755         int body_start;
 756
 757         /* We stuff these with the values coming from the client cookies,
 758          * so we can use them to reconnect a timed out session if we have to.
 759          */
 760         char c_username[SIZ];
 761         char c_password[SIZ];
 762         char c_roomname[SIZ];
 763         char cookie[SIZ];
 764
 765         strcpy(c_username, "");
 766         strcpy(c_password, "");
 767         strcpy(c_roomname, "");
 768
 769         WC->upload_length = 0;
 770         WC->upload = NULL;
 771
 772         WC->is_wap = 0;
 773
 774         hptr = req;
 775         if (hptr == NULL) return;
 776
 777         strcpy(cmd, hptr->line);
 778         hptr = hptr->next;
 779         extract_action(action, cmd);
 780
 781         while (hptr != NULL) {
 782                 strcpy(buf, hptr->line);
 783                 hptr = hptr->next;
 784
 785                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 786                         strcpy(cookie, &buf[15]);
 787                         cookie_to_stuff(cookie, NULL,
 788                                       c_username, c_password, c_roomname);
 789                 }
 790                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 791                         ContentLength = atoi(&buf[16]);
 792                 }
 793                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 794                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 795                 }
 796                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 797                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 798                 }
 799                 else if (!strncasecmp(buf, "Host: ", 6)) {
 800                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 801                 }
 802                 /* Only WAP gateways explicitly name this content-type */
 803                 else if (strstr(buf, "text/vnd.wap.wml")) {
 804                         WC->is_wap = 1;
 805                 }
 806         }
 807
 808         if (ContentLength > 0) {
 809                 content = malloc(ContentLength + SIZ);
 810                 memset(content, 0, ContentLength + SIZ);
 811                 sprintf(content, "Content-type: %s\n"
 812                                 "Content-length: %d\n\n",
 813                                 ContentType, ContentLength);
 814                 body_start = strlen(content);
 815
 816                 BytesRead = 0;
 817                 while (BytesRead < ContentLength) {
 818                         a=read(WC->http_sock, &content[BytesRead+body_start],
 819                                 ContentLength - BytesRead);
 820                         if (a <= 0) BytesRead = ContentLength;
 821                         else BytesRead += a;
 822                 }
 823
 824                 if (!strncasecmp(ContentType,
 825                               "application/x-www-form-urlencoded", 33)) {
 826                         addurls(&content[body_start]);
 827                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 828                         content_end = content + ContentLength + body_start;
 829                         mime_parser(content, content_end, *upload_handler,
 830                                         NULL, NULL, NULL, 0);
 831                 }
 832         } else {
 833                 content = NULL;
 834         }
 835
 836         /* make a note of where we are in case the user wants to save it */
 837         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 838         remove_token(WC->this_page, 2, ' ');
 839         remove_token(WC->this_page, 0, ' ');
 840
 841         /* If there are variables in the URL, we must grab them now */
 842         for (a = 0; a < strlen(cmd); ++a) {
 843                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 844                         for (b = a; b < strlen(cmd); ++b)
 845                                 if (isspace(cmd[b]))
 846                                         cmd[b] = 0;
 847                         addurls(&cmd[a + 1]);
 848                         cmd[a] = 0;
 849                 }
 850         }
 851
 852         /* Static content can be sent without connecting to Citadel. */
 853         if (!strcasecmp(action, "static")) {
 854                 strcpy(buf, &cmd[12]);
 855                 for (a = 0; a < strlen(buf); ++a)
 856                         if (isspace(buf[a]))
 857                                 buf[a] = 0;
 858                 output_static(buf);
 859                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 860         }
 861
 862         /*
 863          * If we're not connected to a Citadel server, try to hook up the
 864          * connection now.
 865          */
 866         if (!WC->connected) {
 867                 if (!strcasecmp(ctdlhost, "uds")) {
 868                         /* unix domain socket */
 869                         sprintf(buf, "%s/citadel.socket", ctdlport);
 870                         WC->serv_sock = uds_connectsock(buf);
 871                 }
 872                 else {
 873                         /* tcp socket */
 874                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 875                 }
 876
 877                 if (WC->serv_sock < 0) {
 878                         do_logout();
 879                         goto SKIP_ALL_THIS_CRAP;
 880                 }
 881                 else {
 882                         WC->connected = 1;
 883                         serv_gets(buf); /* get the server welcome message */
 884                         locate_host(browser_host, WC->http_sock);
 885                         get_serv_info(browser_host, user_agent);
 886                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 887                                 wprintf("You are connected to a Citadel "
 888                                         "server running Citadel %d.%02d;\nin "
 889                                         "order to run this version of WebCit "
 890                                         "you must also have Citadel %d.%02d or"
 891                                         " newer.\n\n\n",
 892                                                 serv_info.serv_rev_level / 100,
 893                                                 serv_info.serv_rev_level % 100,
 894                                                 MINIMUM_CIT_VERSION / 100,
 895                                                 MINIMUM_CIT_VERSION % 100
 896                                         );
 897                                 end_webcit_session();
 898                                 goto SKIP_ALL_THIS_CRAP;
 899                         }
 900                 }
 901         }
 902
 903         /*
 904          * Functions which can be performed without logging in
 905          */
 906         if (!strcasecmp(action, "listsub")) {
 907                 do_listsub();
 908                 goto SKIP_ALL_THIS_CRAP;
 909         }
 910 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
 911         if (!strcasecmp(action, "freebusy")) {
 912                 do_freebusy(cmd);
 913                 goto SKIP_ALL_THIS_CRAP;
 914         }
 915 #endif
 916
 917         check_for_express_messages();
 918
 919         /*
 920          * If we're not logged in, but we have username and password cookies
 921          * supplied by the browser, try using them to log in.
 922          */
 923         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 924                 serv_printf("USER %s", c_username);
 925                 serv_gets(buf);
 926                 if (buf[0] == '3') {
 927                         serv_printf("PASS %s", c_password);
 928                         serv_gets(buf);
 929                         if (buf[0] == '2') {
 930                                 become_logged_in(c_username, c_password, buf);
 931                         }
 932                 }
 933         }
 934         /*
 935          * If we don't have a current room, but a cookie specifying the
 936          * current room is supplied, make an effort to go there.
 937          */
 938         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 939                 serv_printf("GOTO %s", c_roomname);
 940                 serv_gets(buf);
 941                 if (buf[0] == '2') {
 942                         strcpy(WC->wc_roomname, c_roomname);
 943                 }
 944         }
 945
 946         if (!strcasecmp(action, "image")) {
 947                 output_image();
 948
 949         /*
 950          * All functions handled below this point ... make sure we log in
 951          * before doing anything else!
 952          */
 953         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 954                 do_login();
 955         } else if (!WC->logged_in) {
 956                 display_login(NULL);
 957         }
 958
 959         /*
 960          * Various commands...
 961          */
 962
 963         else if (!strcasecmp(action, "do_welcome")) {
 964                 do_welcome();
 965         } else if (!strcasecmp(action, "blank")) {
 966                 blank_page();
 967         } else if (!strcasecmp(action, "do_template")) {
 968                 url_do_template();
 969         } else if (!strcasecmp(action, "display_main_menu")) {
 970                 display_main_menu();
 971         } else if (!strcasecmp(action, "whobbs")) {
 972                 whobbs();
 973         } else if (!strcasecmp(action, "knrooms")) {
 974                 knrooms();
 975         } else if (!strcasecmp(action, "gotonext")) {
 976                 slrp_highest();
 977                 gotonext();
 978         } else if (!strcasecmp(action, "skip")) {
 979                 gotonext();
 980         } else if (!strcasecmp(action, "ungoto")) {
 981                 ungoto();
 982         } else if (!strcasecmp(action, "dotgoto")) {
 983                 slrp_highest();
 984                 smart_goto(bstr("room"));
 985         } else if (!strcasecmp(action, "dotskip")) {
 986                 smart_goto(bstr("room"));
 987         } else if (!strcasecmp(action, "termquit")) {
 988                 do_logout();
 989         } else if (!strcasecmp(action, "readnew")) {
 990                 readloop("readnew");
 991         } else if (!strcasecmp(action, "readold")) {
 992                 readloop("readold");
 993         } else if (!strcasecmp(action, "readfwd")) {
 994                 readloop("readfwd");
 995         } else if (!strcasecmp(action, "headers")) {
 996                 readloop("headers");
 997         } else if (!strcasecmp(action, "display_enter")) {
 998                 display_enter();
 999         } else if (!strcasecmp(action, "post")) {
1000                 post_message();
1001         } else if (!strcasecmp(action, "delete_msg")) {
1002                 delete_msg();
1003         } else if (!strcasecmp(action, "confirm_move_msg")) {
1004                 confirm_move_msg();
1005         } else if (!strcasecmp(action, "move_msg")) {
1006                 move_msg();
1007         } else if (!strcasecmp(action, "userlist")) {
1008                 userlist();
1009         } else if (!strcasecmp(action, "showuser")) {
1010                 showuser();
1011         } else if (!strcasecmp(action, "display_page")) {
1012                 display_page();
1013         } else if (!strcasecmp(action, "page_user")) {
1014                 page_user();
1015         } else if (!strcasecmp(action, "chat")) {
1016                 do_chat();
1017         } else if (!strcasecmp(action, "display_private")) {
1018                 display_private("", 0);
1019         } else if (!strcasecmp(action, "goto_private")) {
1020                 goto_private();
1021         } else if (!strcasecmp(action, "zapped_list")) {
1022                 zapped_list();
1023         } else if (!strcasecmp(action, "display_zap")) {
1024                 display_zap();
1025         } else if (!strcasecmp(action, "zap")) {
1026                 zap();
1027         } else if (!strcasecmp(action, "display_entroom")) {
1028                 display_entroom();
1029         } else if (!strcasecmp(action, "entroom")) {
1030                 entroom();
1031         } else if (!strcasecmp(action, "display_editroom")) {
1032                 display_editroom();
1033         } else if (!strcasecmp(action, "netedit")) {
1034                 netedit();
1035         } else if (!strcasecmp(action, "editroom")) {
1036                 editroom();
1037         } else if (!strcasecmp(action, "display_whok")) {
1038                 display_whok();
1039         } else if (!strcasecmp(action, "display_editinfo")) {
1040                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1041         } else if (!strcasecmp(action, "editinfo")) {
1042                 save_edit("Room info", "EINF 1", 1);
1043         } else if (!strcasecmp(action, "display_editbio")) {
1044                 sprintf(buf, "RBIO %s", WC->wc_username);
1045                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1046         } else if (!strcasecmp(action, "editbio")) {
1047                 save_edit("Your bio", "EBIO", 0);
1048         } else if (!strcasecmp(action, "confirm_delete_room")) {
1049                 confirm_delete_room();
1050         } else if (!strcasecmp(action, "delete_room")) {
1051                 delete_room();
1052         } else if (!strcasecmp(action, "validate")) {
1053                 validate();
1054         } else if (!strcasecmp(action, "display_editpic")) {
1055                 display_graphics_upload("your photo",
1056                                         "UIMG 0|_userpic_",
1057                                         "/editpic");
1058         } else if (!strcasecmp(action, "editpic")) {
1059                 do_graphics_upload("UIMG 1|_userpic_");
1060         } else if (!strcasecmp(action, "display_editroompic")) {
1061                 display_graphics_upload("the graphic for this room",
1062                                         "UIMG 0|_roompic_",
1063                                         "/editroompic");
1064         } else if (!strcasecmp(action, "editroompic")) {
1065                 do_graphics_upload("UIMG 1|_roompic_");
1066         } else if (!strcasecmp(action, "delete_floor")) {
1067                 delete_floor();
1068         } else if (!strcasecmp(action, "rename_floor")) {
1069                 rename_floor();
1070         } else if (!strcasecmp(action, "create_floor")) {
1071                 create_floor();
1072         } else if (!strcasecmp(action, "display_editfloorpic")) {
1073                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1074                         bstr("which_floor"));
1075                 display_graphics_upload("the graphic for this floor",
1076                                         buf,
1077                                         "/editfloorpic");
1078         } else if (!strcasecmp(action, "editfloorpic")) {
1079                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1080                         bstr("which_floor"));
1081                 do_graphics_upload(buf);
1082         } else if (!strcasecmp(action, "display_reg")) {
1083                 display_reg(0);
1084         } else if (!strcasecmp(action, "display_changepw")) {
1085                 display_changepw();
1086         } else if (!strcasecmp(action, "changepw")) {
1087                 changepw();
1088         } else if (!strcasecmp(action, "display_edit_node")) {
1089                 display_edit_node();
1090         } else if (!strcasecmp(action, "edit_node")) {
1091                 edit_node();
1092         } else if (!strcasecmp(action, "display_netconf")) {
1093                 display_netconf();
1094         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1095                 display_confirm_delete_node();
1096         } else if (!strcasecmp(action, "delete_node")) {
1097                 delete_node();
1098         } else if (!strcasecmp(action, "display_add_node")) {
1099                 display_add_node();
1100         } else if (!strcasecmp(action, "add_node")) {
1101                 add_node();
1102         } else if (!strcasecmp(action, "terminate_session")) {
1103                 slrp_highest();
1104                 terminate_session();
1105         } else if (!strcasecmp(action, "edit_me")) {
1106                 edit_me();
1107         } else if (!strcasecmp(action, "display_siteconfig")) {
1108                 display_siteconfig();
1109         } else if (!strcasecmp(action, "page_popup")) {
1110                 page_popup();
1111         } else if (!strcasecmp(action, "siteconfig")) {
1112                 siteconfig();
1113         } else if (!strcasecmp(action, "display_generic")) {
1114                 display_generic();
1115         } else if (!strcasecmp(action, "do_generic")) {
1116                 do_generic();
1117         } else if (!strcasecmp(action, "display_menubar")) {
1118                 display_menubar(1);
1119         } else if (!strcasecmp(action, "output_mimepart")) {
1120                 output_mimepart();
1121         } else if (!strcasecmp(action, "edit_vcard")) {
1122                 edit_vcard();
1123         } else if (!strcasecmp(action, "submit_vcard")) {
1124                 submit_vcard();
1125         } else if (!strcasecmp(action, "select_user_to_edit")) {
1126                 select_user_to_edit(NULL, NULL);
1127         } else if (!strcasecmp(action, "display_edituser")) {
1128                 display_edituser(NULL);
1129         } else if (!strcasecmp(action, "edituser")) {
1130                 edituser();
1131         } else if (!strcasecmp(action, "create_user")) {
1132                 create_user();
1133         } else if (!strcasecmp(action, "changeview")) {
1134                 change_view();
1135         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1136                 do_stuff_to_msgs();
1137         } else if (!strcasecmp(action, "change_start_page")) {
1138                 change_start_page();
1139         } else if (!strcasecmp(action, "display_floorconfig")) {
1140                 display_floorconfig(NULL);
1141         } else if (!strcasecmp(action, "toggle_self_service")) {
1142                 toggle_self_service();
1143 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1144         } else if (!strcasecmp(action, "display_edit_task")) {
1145                 display_edit_task();
1146         } else if (!strcasecmp(action, "save_task")) {
1147                 save_task();
1148         } else if (!strcasecmp(action, "display_edit_event")) {
1149                 display_edit_event();
1150         } else if (!strcasecmp(action, "save_event")) {
1151                 save_event();
1152         } else if (!strcasecmp(action, "respond_to_request")) {
1153                 respond_to_request();
1154         } else if (!strcasecmp(action, "handle_rsvp")) {
1155                 handle_rsvp();
1156 #endif
1157         } else if (!strcasecmp(action, "summary")) {
1158                 summary();
1159         } else if (!strcasecmp(action, "diagnostics")) {
1160                 output_headers(1);
1161
1162                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1163                 wprintf("Command: <BR><PRE>\n");
1164                 escputs(cmd);
1165                 wprintf("</PRE><HR>\n");
1166                 wprintf("Variables: <BR><PRE>\n");
1167                 dump_vars();
1168                 wprintf("</PRE><HR>\n");
1169                 wDumpContent(1);
1170         }
1171         /* When all else fais, display the main menu. */
1172         else {
1173                 display_main_menu();
1174         }
1175
1176 SKIP_ALL_THIS_CRAP:
1177         fflush(stdout);
1178         if (content != NULL) {
1179                 free(content);
1180                 content = NULL;
1181         }
1182         free_urls();
1183         if (WC->upload_length > 0) {
1184                 free(WC->upload);
1185                 WC->upload_length = 0;
1186         }
1187
1188 }