webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  *
   8  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32 #include "webserver.h"
  33 #include "mime_parser.h"
  34
  35 /*
  36  * String to unset the cookie.
  37  * Any date "in the past" will work, so I chose my birthday, right down to
  38  * the exact minute.  :)
  39  */
  40 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  41
  42 void unescape_input(char *buf)
  43 {
  44         int a, b;
  45         char hex[3];
  46
  47         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  48                 buf[strlen(buf) - 1] = 0;
  49
  50         for (a = 0; a < strlen(buf); ++a) {
  51                 if (buf[a] == '+')
  52                         buf[a] = ' ';
  53                 if (buf[a] == '%') {
  54                         hex[0] = buf[a + 1];
  55                         hex[1] = buf[a + 2];
  56                         hex[2] = 0;
  57                         sscanf(hex, "%02x", &b);
  58                         buf[a] = (char) b;
  59                         strcpy(&buf[a + 1], &buf[a + 3]);
  60                 }
  61         }
  62
  63 }
  64
  65
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (strlen(up) > 0) {
  75
  76                 /* locate the = sign */
  77                 safestrncpy(buf, up, sizeof buf);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 strcpy(u->url_key, buf);
  90
  91                 /* now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /* locate "&" and "?" delimiters */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up;
 106                 for (a = 0; a < b; ++a)
 107                         ++ptr;
 108                 strcpy(ptr, "");
 109
 110                 u->url_data = malloc(strlen(up) + 1);
 111                 strcpy(u->url_data, up);
 112                 u->url_data[b] = 0;
 113                 unescape_input(u->url_data);
 114                 up = ptr;
 115                 ++up;
 116         }
 117 }
 118
 119 void free_urls(void)
 120 {
 121         struct urlcontent *u;
 122
 123         while (WC->urlstrings != NULL) {
 124                 free(WC->urlstrings->url_data);
 125                 u = WC->urlstrings->next;
 126                 free(WC->urlstrings);
 127                 WC->urlstrings = u;
 128         }
 129 }
 130
 131 /*
 132  * Diagnostic function to display the contents of all variables
 133  */
 134 void dump_vars(void)
 135 {
 136         struct urlcontent *u;
 137
 138         for (u = WC->urlstrings; u != NULL; u = u->next) {
 139                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 140         }
 141 }
 142
 143 char *bstr(char *key)
 144 {
 145         struct urlcontent *u;
 146
 147         for (u = WC->urlstrings; u != NULL; u = u->next) {
 148                 if (!strcasecmp(u->url_key, key))
 149                         return (u->url_data);
 150         }
 151         return ("");
 152 }
 153
 154
 155 void wprintf(const char *format,...)
 156 {
 157         va_list arg_ptr;
 158         char wbuf[4096];
 159
 160         va_start(arg_ptr, format);
 161         vsprintf(wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         write(WC->http_sock, wbuf, strlen(wbuf));
 165 }
 166
 167
 168 /*
 169  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 170  *
 171  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 172  * append the main menu and closing tags, or 2 to
 173  * append the closing tags only.
 174  */
 175 void wDumpContent(int print_standard_html_footer)
 176 {
 177         if (print_standard_html_footer) {
 178                 do_template("trailing");
 179         }
 180
 181
 182 }
 183
 184
 185 /*
 186  * Copy a string, escaping characters which have meaning in HTML.  If
 187  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 188  */
 189 void stresc(char *target, char *strbuf, int nbsp)
 190 {
 191         int a;
 192         strcpy(target, "");
 193
 194         for (a = 0; a < strlen(strbuf); ++a) {
 195                 if (strbuf[a] == '<')
 196                         strcat(target, "&lt;");
 197                 else if (strbuf[a] == '>')
 198                         strcat(target, "&gt;");
 199                 else if (strbuf[a] == '&')
 200                         strcat(target, "&amp;");
 201                 else if (strbuf[a] == '\"')
 202                         strcat(target, "&quot;");
 203                 else if (strbuf[a] == '\'')
 204                         strcat(target, "&#39;");
 205                 else if (strbuf[a] == LB)
 206                         strcat(target, "<");
 207                 else if (strbuf[a] == RB)
 208                         strcat(target, ">");
 209                 else if (strbuf[a] == QU)
 210                         strcat(target, "\"");
 211                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 212                         strcat(target, "&nbsp;");
 213                 } else {
 214                         strncat(target, &strbuf[a], 1);
 215                 }
 216         }
 217 }
 218
 219 void escputs1(char *strbuf, int nbsp)
 220 {
 221         char buf[1024];
 222         stresc(buf, strbuf, nbsp);
 223         wprintf("%s", buf);
 224 }
 225
 226 void escputs(char *strbuf)
 227 {
 228         escputs1(strbuf, 0);
 229 }
 230
 231 /*
 232  * Escape a string for feeding out as a URL.
 233  * Returns a pointer to a buffer that must be freed by the caller!
 234  */
 235 void urlesc(char *outbuf, char *strbuf)
 236 {
 237         int a, b, c;
 238         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 239
 240         strcpy(outbuf, "");
 241
 242         for (a = 0; a < strlen(strbuf); ++a) {
 243                 c = 0;
 244                 for (b = 0; b < strlen(ec); ++b) {
 245                         if (strbuf[a] == ec[b])
 246                                 c = 1;
 247                 }
 248                 b = strlen(outbuf);
 249                 if (c == 1)
 250                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 251                 else
 252                         sprintf(&outbuf[b], "%c", strbuf[a]);
 253         }
 254 }
 255
 256 void urlescputs(char *strbuf)
 257 {
 258         char outbuf[SIZ];
 259
 260         urlesc(outbuf, strbuf);
 261         wprintf("%s", outbuf);
 262 }
 263
 264
 265 /*
 266  * Copy a string, escaping characters for JavaScript strings.
 267  */
 268 void jsesc(char *target, char *strbuf)
 269 {
 270         int a;
 271         strcpy(target, "");
 272
 273         for (a = 0; a < strlen(strbuf); ++a) {
 274                 if (strbuf[a] == '<')
 275                         strcat(target, "[");
 276                 else if (strbuf[a] == '>')
 277                         strcat(target, "]");
 278                 else if (strbuf[a] == '\"')
 279                         strcat(target, "&quot;");
 280                 else if (strbuf[a] == '&')
 281                         strcat(target, "&amp;;");
 282                 else if (strbuf[a] == '\'')
 283                         strcat(target, "\\'");
 284                 else {
 285                         strncat(target, &strbuf[a], 1);
 286                 }
 287         }
 288 }
 289
 290 void jsescputs(char *strbuf)
 291 {
 292         char outbuf[SIZ];
 293
 294         jsesc(outbuf, strbuf);
 295         wprintf("%s", outbuf);
 296 }
 297
 298
 299
 300
 301 /*
 302  * Output all that important stuff that the browser will want to see
 303  *
 304  * control codes:
 305  *
 306  * Bits 0 and 1:
 307  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 308  * 1 = HTTP headers plus the room banner
 309  * 2 = HTTP headers required to terminate the session (unset cookies)
 310  * 3 = HTTP and HTML headers, but no room banner
 311  *
 312  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 313  * Bit 3: suppress check for express messages
 314  * Bit 4: Allow browser to cache this document
 315  *
 316  */
 317 void output_headers(int controlcode)
 318 {
 319         char cookie[SIZ];
 320         int print_standard_html_head = 0;
 321         int refresh30 = 0;
 322         int suppress_check = 0;
 323         int cache = 0;
 324         char httpnow[SIZ];
 325         char onload_fcn[SIZ];
 326         static int pageseq = 0;
 327         print_standard_html_head        =       controlcode & 0x03;
 328         refresh30                       =       ((controlcode & 0x04) >> 2);
 329         suppress_check                  =       ((controlcode & 0x08) >> 3);
 330         cache                           =       ((controlcode & 0x10) >> 4);
 331
 332         wprintf("HTTP/1.0 200 OK\n");
 333
 334         httpdate(httpnow, time(NULL));
 335
 336         if (print_standard_html_head > 0) {
 337                 wprintf("Content-type: text/html\n"
 338                         "Server: %s\n", SERVER
 339                 );
 340                 if (!cache)
 341                         wprintf("Connection: close\n"
 342                                 "Pragma: no-cache\n"
 343                                 "Cache-Control: no-store\n"
 344                         );
 345         }
 346
 347         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 348                         WC->wc_password, WC->wc_roomname);
 349
 350         if (print_standard_html_head == 2) {
 351                 wprintf("Set-cookie: webcit=%s\n", unset);
 352         } else {
 353                 wprintf("Set-cookie: webcit=%s\n", cookie);
 354                 if (server_cookie != NULL) {
 355                         wprintf("%s\n", server_cookie);
 356                 }
 357         }
 358
 359         if (print_standard_html_head > 0) {
 360                 wprintf("\n");
 361
 362                 if (refresh30) svprintf("REFRESHTAG", WCS_STRING,
 363                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 364                 else svprintf("REFRESHTAG", WCS_STRING,
 365                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 366                 /* script for checking for pages (not always launched) */
 367
 368                 sprintf(onload_fcn, "function onload_fcn() { \n");
 369                 if (!WC->outside_frameset_allowed) {
 370                         strcat(onload_fcn, "  force_frameset();  \n");
 371                 }
 372                 if (!suppress_check) if (WC->HaveExpressMessages) {
 373                         strcat(onload_fcn, "  launch_page_popup();  \n");
 374                         WC->HaveExpressMessages = 0;
 375                 }
 376                 strcat(onload_fcn, "} \n");
 377
 378                 svprintf("PAGERSCRIPT", WCS_STRING,
 379                         "<SCRIPT LANGUAGE=\"JavaScript\">\n"
 380                         "function launch_page_popup() {\n"
 381                         "pwin = window.open('/page_popup', 'CitaPage%d', "
 382                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 383                         "scrollbars=yes,resizable=no,height=250,width=400');\n"
 384                         "}\n"
 385                         "function force_frameset() { \n"
 386                         " if (top.frames.length == 0) { \n"
 387                         "  top.location.replace('/do_welcome'); \n"
 388                         " } \n"
 389                         "} \n"
 390                         "%s\n"
 391                         "</SCRIPT>\n",
 392                         ++pageseq,
 393                         onload_fcn
 394                 );
 395                 /* end script */
 396
 397
 398                 do_template("head");
 399                 clear_local_substs();
 400
 401                 svprintf("extrabodyparms", WCS_STRING, "%s",
 402                         "onload='onload_fcn();' ");
 403
 404                 do_template("background");
 405                 clear_local_substs();
 406         }
 407
 408         if (print_standard_html_head == 1) {
 409                 wprintf("<A NAME=\"TheTop\"></A>");
 410                 embed_room_banner(NULL);
 411         }
 412
 413         if (strlen(WC->ImportantMessage) > 0) {
 414                 do_template("beginbox_nt");
 415                 wprintf("<SPAN CLASS=\"errormsg\">"
 416                         "%s</SPAN><BR>\n", WC->ImportantMessage);
 417                 do_template("endbox");
 418                 strcpy(WC->ImportantMessage, "");
 419         }
 420 }
 421
 422
 423 /*
 424  *
 425  */
 426 void http_redirect(char *whichpage) {
 427         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 428         wprintf("Location: %s\n", whichpage);
 429         wprintf("URI: %s\n", whichpage);
 430         wprintf("Content-type: text/html\n\n");
 431         wprintf("<html><body>\n");
 432         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 433                 whichpage);
 434         wprintf("</body></html>\n");
 435 }
 436
 437
 438
 439 void check_for_express_messages()
 440 {
 441         char buf[SIZ];
 442
 443         serv_puts("NOOP");
 444         serv_gets(buf);
 445         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 446 }
 447
 448
 449
 450
 451 /*
 452  * Output a piece of content to the web browser
 453  */
 454 void http_transmit_thing(char *thing, size_t length, char *content_type,
 455                          int is_static) {
 456         output_headers(is_static ? 0x10 : 0x00);
 457         wprintf("Content-type: %s\n"
 458                 "Content-length: %ld\n"
 459                 "Server: %s\n"
 460                 "Connection: close\n"
 461                 "\n",
 462                 content_type,
 463                 (long) length,
 464                 SERVER
 465         );
 466         write(WC->http_sock, thing, (size_t)length);
 467 }
 468
 469
 470
 471
 472 void output_static(char *what)
 473 {
 474         char buf[4096];
 475         FILE *fp;
 476         struct stat statbuf;
 477         off_t bytes;
 478         char *bigbuffer;
 479         char content_type[SIZ];
 480
 481         lprintf(9, "output_static(%s)\n", what);
 482         sprintf(buf, "static/%s", what);
 483         fp = fopen(buf, "rb");
 484         if (fp == NULL) {
 485                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 486                 wprintf("Content-Type: text/plain\n");
 487                 wprintf("\n");
 488                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 489         } else {
 490                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 491                         strcpy(content_type, "image/gif");
 492                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 493                         strcpy(content_type, "text/plain");
 494                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 495                         strcpy(content_type, "text/css");
 496                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 497                         strcpy(content_type, "image/jpeg");
 498                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 499                         strcpy(content_type, "image/png");
 500                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 501                         strcpy(content_type, "image/x-icon");
 502                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 503                         strcpy(content_type, "text/html");
 504                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 505                         strcpy(content_type, "text/vnd.wap.wml");
 506                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 507                         strcpy(content_type, "text/vnd.wap.wmlscript");
 508                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 509                         strcpy(content_type, "application/vnd.wap.wmlc");
 510                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 511                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 512                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 513                         wprintf("Content-type: image/vnd.wap.wbmp");
 514                 else
 515                         wprintf("Content-type: application/octet-stream");
 516
 517                 fstat(fileno(fp), &statbuf);
 518                 bytes = statbuf.st_size;
 519                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 520                 bigbuffer = malloc(bytes);
 521                 fread(bigbuffer, bytes, 1, fp);
 522                 fclose(fp);
 523
 524                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 525                 free(bigbuffer);
 526         }
 527         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 528                 end_webcit_session();
 529         }
 530 }
 531
 532
 533 /*
 534  * When the browser requests an image file from the Citadel server,
 535  * this function is called to transmit it.
 536  */
 537 void output_image()
 538 {
 539         char buf[SIZ];
 540         char *xferbuf = NULL;
 541         off_t bytes;
 542
 543         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 544         serv_gets(buf);
 545         if (buf[0] == '2') {
 546                 bytes = extract_long(&buf[4], 0);
 547                 xferbuf = malloc(bytes);
 548
 549                 /* Read it from the server */
 550                 read_server_binary(xferbuf, bytes);
 551                 serv_puts("CLOS");
 552                 serv_gets(buf);
 553
 554                 /* Write it to the browser */
 555                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 556                 free(xferbuf);
 557
 558         } else {
 559
 560                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 561                  * when there's no such image on the server.
 562                  */
 563                 output_static("blank.gif");
 564
 565                 /*
 566                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 567                 output_headers(0);
 568                 wprintf("Content-Type: text/plain\n"
 569                         "\n"
 570                         "Error retrieving image: %s\n",
 571                         &buf[4]
 572                 );
 573                 */
 574
 575         }
 576
 577
 578
 579 }
 580
 581 /*
 582  */
 583 void output_mimepart()
 584 {
 585         char buf[SIZ];
 586         off_t bytes;
 587         char content_type[SIZ];
 588         char *content = NULL;
 589
 590         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 591         serv_gets(buf);
 592         if (buf[0] == '2') {
 593                 bytes = extract_long(&buf[4], 0);
 594                 content = malloc(bytes);
 595                 extract(content_type, &buf[4], 3);
 596                 output_headers(0);
 597                 read_server_binary(content, bytes);
 598                 serv_puts("CLOS");
 599                 serv_gets(buf);
 600                 http_transmit_thing(content, bytes, content_type, 0);
 601                 free(content);
 602         } else {
 603                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 604                 output_headers(0);
 605                 wprintf("Content-Type: text/plain\n");
 606                 wprintf("\n");
 607                 wprintf("Error retrieving part: %s\n", &buf[4]);
 608         }
 609
 610 }
 611
 612
 613 /*
 614  */
 615 char *load_mimepart(long msgnum, char *partnum)
 616 {
 617         char buf[SIZ];
 618         off_t bytes;
 619         char content_type[SIZ];
 620         char *content;
 621
 622         serv_printf("OPNA %ld|%s", msgnum, partnum);
 623         serv_gets(buf);
 624         if (buf[0] == '2') {
 625                 bytes = extract_long(&buf[4], 0);
 626                 extract(content_type, &buf[4], 3);
 627
 628                 content = malloc(bytes + 1);
 629                 read_server_binary(content, bytes);
 630
 631                 serv_puts("CLOS");
 632                 serv_gets(buf);
 633                 content[bytes] = 0;     /* null terminate for good measure */
 634                 return(content);
 635         }
 636         else {
 637                 return(NULL);
 638         }
 639
 640 }
 641
 642
 643 /*
 644  * Convenience functions to display a page containing only a string
 645  */
 646 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 647 {
 648         wprintf("HTTP/1.0 200 OK\n");
 649         output_headers(1);
 650         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 651         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 652         wprintf("</TD></TR></TABLE><BR>\n");
 653         escputs(messagetext);
 654
 655         wprintf("<HR>\n");
 656         wDumpContent(1);
 657 }
 658
 659
 660 /*
 661  * Display a blank page.
 662  */
 663 void blank_page(void) {
 664         output_headers(7);
 665         wDumpContent(2);
 666 }
 667
 668
 669 /*
 670  * A template has been requested
 671  */
 672 void url_do_template(void) {
 673         do_template(bstr("template"));
 674 }
 675
 676
 677
 678 /*
 679  * Offer to make any page the user's "start page."
 680  */
 681 void offer_start_page(void) {
 682         wprintf("<A HREF=\"/change_start_page?startpage=");
 683         urlescputs(WC->this_page);
 684         wprintf("\">"
 685                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 686                 "</A>"
 687         );
 688 }
 689
 690
 691 /*
 692  * Change the user's start page
 693  */
 694 void change_start_page(void) {
 695
 696         if (bstr("startpage") == NULL) {
 697                 strcpy(WC->ImportantMessage,
 698                         "startpage set to null");
 699                 display_main_menu();
 700                 return;
 701         }
 702
 703         set_preference("startpage", bstr("startpage"));
 704
 705         output_headers(3);
 706         do_template("newstartpage");
 707         wDumpContent(1);
 708 }
 709
 710
 711
 712
 713 void display_success(char *successmessage)
 714 {
 715         convenience_page("007700", "OK", successmessage);
 716 }
 717
 718
 719
 720 void extract_action(char *actbuf, char *cmdbuf)
 721 {
 722         int i;
 723
 724         strcpy(actbuf, cmdbuf);
 725         if (!strncasecmp(actbuf, "GET /", 5))
 726                 strcpy(actbuf, &actbuf[5]);
 727         if (!strncasecmp(actbuf, "PUT /", 5))
 728                 strcpy(actbuf, &actbuf[5]);
 729         if (!strncasecmp(actbuf, "POST /", 6))
 730                 strcpy(actbuf, &actbuf[6]);
 731
 732         for (i = 0; i < strlen(actbuf); ++i) {
 733                 if (actbuf[i] == ' ') {
 734                         actbuf[i] = 0;
 735                         i = 0;
 736                 }
 737                 if (actbuf[i] == '/') {
 738                         actbuf[i] = 0;
 739                         i = 0;
 740                 }
 741                 if (actbuf[i] == '?') {
 742                         actbuf[i] = 0;
 743                         i = 0;
 744                 }
 745                 if (actbuf[i] == '&') {
 746                         actbuf[i] = 0;
 747                         i = 0;
 748                 }
 749         }
 750 }
 751
 752
 753 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 754                         void *content, char *cbtype, size_t length,
 755                         char *encoding, void *userdata)
 756 {
 757         struct urlcontent *u;
 758
 759         /* Form fields */
 760         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 761                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 762                 u->next = WC->urlstrings;
 763                 WC->urlstrings = u;
 764                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 765                 u->url_data = malloc(length + 1);
 766                 memcpy(u->url_data, content, length);
 767                 u->url_data[length] = 0;
 768         }
 769
 770         /* Uploaded files */
 771         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 772                 WC->upload = malloc(length);
 773                 if (WC->upload != NULL) {
 774                         WC->upload_length = length;
 775                         safestrncpy(WC->upload_filename, filename,
 776                                         sizeof(WC->upload_filename));
 777                         safestrncpy(WC->upload_content_type, cbtype,
 778                                         sizeof(WC->upload_content_type));
 779                         memcpy(WC->upload, content, length);
 780                 }
 781                 else {
 782                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 783                 }
 784         }
 785
 786 }
 787
 788
 789
 790
 791 /*
 792  * Entry point for WebCit transaction
 793  */
 794 void session_loop(struct httprequest *req)
 795 {
 796         char cmd[SIZ];
 797         char action[SIZ];
 798         char buf[SIZ];
 799         int a, b;
 800         int ContentLength = 0;
 801         int BytesRead;
 802         char ContentType[512];
 803         char *content;
 804         char *content_end;
 805         struct httprequest *hptr;
 806         char browser_host[SIZ];
 807         char user_agent[SIZ];
 808         int body_start;
 809
 810         /* We stuff these with the values coming from the client cookies,
 811          * so we can use them to reconnect a timed out session if we have to.
 812          */
 813         char c_username[SIZ];
 814         char c_password[SIZ];
 815         char c_roomname[SIZ];
 816         char cookie[SIZ];
 817
 818         strcpy(c_username, "");
 819         strcpy(c_password, "");
 820         strcpy(c_roomname, "");
 821
 822         WC->upload_length = 0;
 823         WC->upload = NULL;
 824
 825         WC->is_wap = 0;
 826
 827         hptr = req;
 828         if (hptr == NULL) return;
 829
 830         strcpy(cmd, hptr->line);
 831         hptr = hptr->next;
 832         extract_action(action, cmd);
 833
 834         while (hptr != NULL) {
 835                 strcpy(buf, hptr->line);
 836                 hptr = hptr->next;
 837
 838                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 839                         strcpy(cookie, &buf[15]);
 840                         cookie_to_stuff(cookie, NULL,
 841                                       c_username, c_password, c_roomname);
 842                 }
 843                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 844                         ContentLength = atoi(&buf[16]);
 845                 }
 846                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 847                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 848                 }
 849                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 850                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 851                 }
 852                 else if (!strncasecmp(buf, "Host: ", 6)) {
 853                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 854                 }
 855                 /* Only WAP gateways explicitly name this content-type */
 856                 else if (strstr(buf, "text/vnd.wap.wml")) {
 857                         WC->is_wap = 1;
 858                 }
 859         }
 860
 861         if (ContentLength > 0) {
 862                 content = malloc(ContentLength + SIZ);
 863                 memset(content, 0, ContentLength + SIZ);
 864                 sprintf(content, "Content-type: %s\n"
 865                                 "Content-length: %d\n\n",
 866                                 ContentType, ContentLength);
 867                 body_start = strlen(content);
 868
 869                 BytesRead = 0;
 870                 while (BytesRead < ContentLength) {
 871                         a=read(WC->http_sock, &content[BytesRead+body_start],
 872                                 ContentLength - BytesRead);
 873                         if (a <= 0) BytesRead = ContentLength;
 874                         else BytesRead += a;
 875                 }
 876
 877                 if (!strncasecmp(ContentType,
 878                               "application/x-www-form-urlencoded", 33)) {
 879                         addurls(&content[body_start]);
 880                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 881                         content_end = content + ContentLength + body_start;
 882                         mime_parser(content, content_end, *upload_handler,
 883                                         NULL, NULL, NULL, 0);
 884                 }
 885         } else {
 886                 content = NULL;
 887         }
 888
 889         /* make a note of where we are in case the user wants to save it */
 890         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 891         remove_token(WC->this_page, 2, ' ');
 892         remove_token(WC->this_page, 0, ' ');
 893
 894         /* If there are variables in the URL, we must grab them now */
 895         for (a = 0; a < strlen(cmd); ++a) {
 896                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 897                         for (b = a; b < strlen(cmd); ++b)
 898                                 if (isspace(cmd[b]))
 899                                         cmd[b] = 0;
 900                         addurls(&cmd[a + 1]);
 901                         cmd[a] = 0;
 902                 }
 903         }
 904
 905         /* Static content can be sent without connecting to Citadel. */
 906         if (!strcasecmp(action, "static")) {
 907                 strcpy(buf, &cmd[12]);
 908                 for (a = 0; a < strlen(buf); ++a)
 909                         if (isspace(buf[a]))
 910                                 buf[a] = 0;
 911                 output_static(buf);
 912                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 913         }
 914
 915         /*
 916          * If we're not connected to a Citadel server, try to hook up the
 917          * connection now.
 918          */
 919         if (!WC->connected) {
 920                 if (!strcasecmp(ctdlhost, "uds")) {
 921                         /* unix domain socket */
 922                         sprintf(buf, "%s/citadel.socket", ctdlport);
 923                         WC->serv_sock = uds_connectsock(buf);
 924                 }
 925                 else {
 926                         /* tcp socket */
 927                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 928                 }
 929
 930                 if (WC->serv_sock < 0) {
 931                         do_logout();
 932                         goto SKIP_ALL_THIS_CRAP;
 933                 }
 934                 else {
 935                         WC->connected = 1;
 936                         serv_gets(buf); /* get the server welcome message */
 937                         locate_host(browser_host, WC->http_sock);
 938                         get_serv_info(browser_host, user_agent);
 939                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 940                                 wprintf("You are connected to a Citadel "
 941                                         "server running Citadel %d.%02d;\nin "
 942                                         "order to run this version of WebCit "
 943                                         "you must also have Citadel %d.%02d or"
 944                                         " newer.\n\n\n",
 945                                                 serv_info.serv_rev_level / 100,
 946                                                 serv_info.serv_rev_level % 100,
 947                                                 MINIMUM_CIT_VERSION / 100,
 948                                                 MINIMUM_CIT_VERSION % 100
 949                                         );
 950                                 end_webcit_session();
 951                                 goto SKIP_ALL_THIS_CRAP;
 952                         }
 953                 }
 954         }
 955
 956         /*
 957          * Functions which can be performed without logging in
 958          */
 959         if (!strcasecmp(action, "listsub")) {
 960                 do_listsub();
 961                 goto SKIP_ALL_THIS_CRAP;
 962         }
 963 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
 964         if (!strcasecmp(action, "freebusy")) {
 965                 do_freebusy(cmd);
 966                 goto SKIP_ALL_THIS_CRAP;
 967         }
 968 #endif
 969
 970         check_for_express_messages();
 971
 972         /*
 973          * If we're not logged in, but we have username and password cookies
 974          * supplied by the browser, try using them to log in.
 975          */
 976         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 977                 serv_printf("USER %s", c_username);
 978                 serv_gets(buf);
 979                 if (buf[0] == '3') {
 980                         serv_printf("PASS %s", c_password);
 981                         serv_gets(buf);
 982                         if (buf[0] == '2') {
 983                                 become_logged_in(c_username, c_password, buf);
 984                         }
 985                 }
 986         }
 987         /*
 988          * If we don't have a current room, but a cookie specifying the
 989          * current room is supplied, make an effort to go there.
 990          */
 991         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 992                 serv_printf("GOTO %s", c_roomname);
 993                 serv_gets(buf);
 994                 if (buf[0] == '2') {
 995                         strcpy(WC->wc_roomname, c_roomname);
 996                 }
 997         }
 998
 999         if (!strcasecmp(action, "image")) {
1000                 output_image();
1001
1002         /*
1003          * All functions handled below this point ... make sure we log in
1004          * before doing anything else!
1005          */
1006         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1007                 do_login();
1008         } else if (!WC->logged_in) {
1009                 display_login(NULL);
1010         }
1011
1012         /*
1013          * Various commands...
1014          */
1015
1016         else if (!strcasecmp(action, "do_welcome")) {
1017                 do_welcome();
1018         } else if (!strcasecmp(action, "blank")) {
1019                 blank_page();
1020         } else if (!strcasecmp(action, "do_template")) {
1021                 url_do_template();
1022         } else if (!strcasecmp(action, "display_main_menu")) {
1023                 display_main_menu();
1024         } else if (!strcasecmp(action, "whobbs")) {
1025                 whobbs();
1026         } else if (!strcasecmp(action, "knrooms")) {
1027                 knrooms();
1028         } else if (!strcasecmp(action, "gotonext")) {
1029                 slrp_highest();
1030                 gotonext();
1031         } else if (!strcasecmp(action, "skip")) {
1032                 gotonext();
1033         } else if (!strcasecmp(action, "ungoto")) {
1034                 ungoto();
1035         } else if (!strcasecmp(action, "dotgoto")) {
1036                 slrp_highest();
1037                 smart_goto(bstr("room"));
1038         } else if (!strcasecmp(action, "dotskip")) {
1039                 smart_goto(bstr("room"));
1040         } else if (!strcasecmp(action, "termquit")) {
1041                 do_logout();
1042         } else if (!strcasecmp(action, "readnew")) {
1043                 readloop("readnew");
1044         } else if (!strcasecmp(action, "readold")) {
1045                 readloop("readold");
1046         } else if (!strcasecmp(action, "readfwd")) {
1047                 readloop("readfwd");
1048         } else if (!strcasecmp(action, "headers")) {
1049                 readloop("headers");
1050         } else if (!strcasecmp(action, "display_enter")) {
1051                 display_enter();
1052         } else if (!strcasecmp(action, "post")) {
1053                 post_message();
1054         } else if (!strcasecmp(action, "delete_msg")) {
1055                 delete_msg();
1056         } else if (!strcasecmp(action, "confirm_move_msg")) {
1057                 confirm_move_msg();
1058         } else if (!strcasecmp(action, "move_msg")) {
1059                 move_msg();
1060         } else if (!strcasecmp(action, "userlist")) {
1061                 userlist();
1062         } else if (!strcasecmp(action, "showuser")) {
1063                 showuser();
1064         } else if (!strcasecmp(action, "display_page")) {
1065                 display_page();
1066         } else if (!strcasecmp(action, "page_user")) {
1067                 page_user();
1068         } else if (!strcasecmp(action, "chat")) {
1069                 do_chat();
1070         } else if (!strcasecmp(action, "display_private")) {
1071                 display_private("", 0);
1072         } else if (!strcasecmp(action, "goto_private")) {
1073                 goto_private();
1074         } else if (!strcasecmp(action, "zapped_list")) {
1075                 zapped_list();
1076         } else if (!strcasecmp(action, "display_zap")) {
1077                 display_zap();
1078         } else if (!strcasecmp(action, "zap")) {
1079                 zap();
1080         } else if (!strcasecmp(action, "display_entroom")) {
1081                 display_entroom();
1082         } else if (!strcasecmp(action, "entroom")) {
1083                 entroom();
1084         } else if (!strcasecmp(action, "display_editroom")) {
1085                 display_editroom();
1086         } else if (!strcasecmp(action, "netedit")) {
1087                 netedit();
1088         } else if (!strcasecmp(action, "editroom")) {
1089                 editroom();
1090         } else if (!strcasecmp(action, "display_whok")) {
1091                 display_whok();
1092         } else if (!strcasecmp(action, "display_editinfo")) {
1093                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1094         } else if (!strcasecmp(action, "editinfo")) {
1095                 save_edit("Room info", "EINF 1", 1);
1096         } else if (!strcasecmp(action, "display_editbio")) {
1097                 sprintf(buf, "RBIO %s", WC->wc_username);
1098                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1099         } else if (!strcasecmp(action, "editbio")) {
1100                 save_edit("Your bio", "EBIO", 0);
1101         } else if (!strcasecmp(action, "confirm_delete_room")) {
1102                 confirm_delete_room();
1103         } else if (!strcasecmp(action, "delete_room")) {
1104                 delete_room();
1105         } else if (!strcasecmp(action, "validate")) {
1106                 validate();
1107         } else if (!strcasecmp(action, "display_editpic")) {
1108                 display_graphics_upload("your photo",
1109                                         "UIMG 0|_userpic_",
1110                                         "/editpic");
1111         } else if (!strcasecmp(action, "editpic")) {
1112                 do_graphics_upload("UIMG 1|_userpic_");
1113         } else if (!strcasecmp(action, "display_editroompic")) {
1114                 display_graphics_upload("the graphic for this room",
1115                                         "UIMG 0|_roompic_",
1116                                         "/editroompic");
1117         } else if (!strcasecmp(action, "editroompic")) {
1118                 do_graphics_upload("UIMG 1|_roompic_");
1119         } else if (!strcasecmp(action, "delete_floor")) {
1120                 delete_floor();
1121         } else if (!strcasecmp(action, "rename_floor")) {
1122                 rename_floor();
1123         } else if (!strcasecmp(action, "create_floor")) {
1124                 create_floor();
1125         } else if (!strcasecmp(action, "display_editfloorpic")) {
1126                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1127                         bstr("which_floor"));
1128                 display_graphics_upload("the graphic for this floor",
1129                                         buf,
1130                                         "/editfloorpic");
1131         } else if (!strcasecmp(action, "editfloorpic")) {
1132                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1133                         bstr("which_floor"));
1134                 do_graphics_upload(buf);
1135         } else if (!strcasecmp(action, "display_reg")) {
1136                 display_reg(0);
1137         } else if (!strcasecmp(action, "display_changepw")) {
1138                 display_changepw();
1139         } else if (!strcasecmp(action, "changepw")) {
1140                 changepw();
1141         } else if (!strcasecmp(action, "display_edit_node")) {
1142                 display_edit_node();
1143         } else if (!strcasecmp(action, "edit_node")) {
1144                 edit_node();
1145         } else if (!strcasecmp(action, "display_netconf")) {
1146                 display_netconf();
1147         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1148                 display_confirm_delete_node();
1149         } else if (!strcasecmp(action, "delete_node")) {
1150                 delete_node();
1151         } else if (!strcasecmp(action, "display_add_node")) {
1152                 display_add_node();
1153         } else if (!strcasecmp(action, "add_node")) {
1154                 add_node();
1155         } else if (!strcasecmp(action, "terminate_session")) {
1156                 slrp_highest();
1157                 terminate_session();
1158         } else if (!strcasecmp(action, "edit_me")) {
1159                 edit_me();
1160         } else if (!strcasecmp(action, "display_siteconfig")) {
1161                 display_siteconfig();
1162         } else if (!strcasecmp(action, "chat_recv")) {
1163                 chat_recv();
1164         } else if (!strcasecmp(action, "chat_send")) {
1165                 chat_send();
1166         } else if (!strcasecmp(action, "page_popup")) {
1167                 page_popup();
1168         } else if (!strcasecmp(action, "siteconfig")) {
1169                 siteconfig();
1170         } else if (!strcasecmp(action, "display_generic")) {
1171                 display_generic();
1172         } else if (!strcasecmp(action, "do_generic")) {
1173                 do_generic();
1174         } else if (!strcasecmp(action, "display_menubar")) {
1175                 display_menubar(1);
1176         } else if (!strcasecmp(action, "output_mimepart")) {
1177                 output_mimepart();
1178         } else if (!strcasecmp(action, "edit_vcard")) {
1179                 edit_vcard();
1180         } else if (!strcasecmp(action, "submit_vcard")) {
1181                 submit_vcard();
1182         } else if (!strcasecmp(action, "select_user_to_edit")) {
1183                 select_user_to_edit(NULL, NULL);
1184         } else if (!strcasecmp(action, "display_edituser")) {
1185                 display_edituser(NULL, 0);
1186         } else if (!strcasecmp(action, "edituser")) {
1187                 edituser();
1188         } else if (!strcasecmp(action, "create_user")) {
1189                 create_user();
1190         } else if (!strcasecmp(action, "changeview")) {
1191                 change_view();
1192         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1193                 do_stuff_to_msgs();
1194         } else if (!strcasecmp(action, "change_start_page")) {
1195                 change_start_page();
1196         } else if (!strcasecmp(action, "display_floorconfig")) {
1197                 display_floorconfig(NULL);
1198         } else if (!strcasecmp(action, "toggle_self_service")) {
1199                 toggle_self_service();
1200 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1201         } else if (!strcasecmp(action, "display_edit_task")) {
1202                 display_edit_task();
1203         } else if (!strcasecmp(action, "save_task")) {
1204                 save_task();
1205         } else if (!strcasecmp(action, "display_edit_event")) {
1206                 display_edit_event();
1207         } else if (!strcasecmp(action, "save_event")) {
1208                 save_event();
1209         } else if (!strcasecmp(action, "respond_to_request")) {
1210                 respond_to_request();
1211         } else if (!strcasecmp(action, "handle_rsvp")) {
1212                 handle_rsvp();
1213 #endif
1214         } else if (!strcasecmp(action, "summary")) {
1215                 summary();
1216         } else if (!strcasecmp(action, "iconbar")) {
1217                 do_iconbar();
1218         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1219                 display_customize_iconbar();
1220         } else if (!strcasecmp(action, "commit_iconbar")) {
1221                 commit_iconbar();
1222         } else if (!strcasecmp(action, "diagnostics")) {
1223                 output_headers(1);
1224
1225                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1226                 wprintf("Command: <BR><PRE>\n");
1227                 escputs(cmd);
1228                 wprintf("</PRE><HR>\n");
1229                 wprintf("Variables: <BR><PRE>\n");
1230                 dump_vars();
1231                 wprintf("</PRE><HR>\n");
1232                 wDumpContent(1);
1233         }
1234         /* When all else fais, display the main menu. */
1235         else {
1236                 display_main_menu();
1237         }
1238
1239 SKIP_ALL_THIS_CRAP:
1240         fflush(stdout);
1241         if (content != NULL) {
1242                 free(content);
1243                 content = NULL;
1244         }
1245         free_urls();
1246         if (WC->upload_length > 0) {
1247                 free(WC->upload);
1248                 WC->upload_length = 0;
1249         }
1250
1251 }