webcit/webcit.c

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