webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  *
   8  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32 #include "webserver.h"
  33 #include "mime_parser.h"
  34
  35 /*
  36  * String to unset the cookie.
  37  * Any date "in the past" will work, so I chose my birthday, right down to
  38  * the exact minute.  :)
  39  */
  40 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  41
  42 void unescape_input(char *buf)
  43 {
  44         int a, b;
  45         char hex[3];
  46
  47         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  48                 buf[strlen(buf) - 1] = 0;
  49
  50         for (a = 0; a < strlen(buf); ++a) {
  51                 if (buf[a] == '+')
  52                         buf[a] = ' ';
  53                 if (buf[a] == '%') {
  54                         hex[0] = buf[a + 1];
  55                         hex[1] = buf[a + 2];
  56                         hex[2] = 0;
  57                         sscanf(hex, "%02x", &b);
  58                         buf[a] = (char) b;
  59                         strcpy(&buf[a + 1], &buf[a + 3]);
  60                 }
  61         }
  62
  63 }
  64
  65
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (strlen(up) > 0) {
  75
  76                 /* locate the = sign */
  77                 safestrncpy(buf, up, sizeof buf);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 strcpy(u->url_key, buf);
  90
  91                 /* now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /* locate the & sign */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if (!strncmp(ptr, "&", 1)) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up;
 106                 for (a = 0; a < b; ++a)
 107                         ++ptr;
 108                 strcpy(ptr, "");
 109
 110                 u->url_data = malloc(strlen(up) + 1);
 111                 strcpy(u->url_data, up);
 112                 u->url_data[b] = 0;
 113                 unescape_input(u->url_data);
 114                 up = ptr;
 115                 ++up;
 116         }
 117 }
 118
 119 void free_urls(void)
 120 {
 121         struct urlcontent *u;
 122
 123         while (WC->urlstrings != NULL) {
 124                 free(WC->urlstrings->url_data);
 125                 u = WC->urlstrings->next;
 126                 free(WC->urlstrings);
 127                 WC->urlstrings = u;
 128         }
 129 }
 130
 131 /*
 132  * Diagnostic function to display the contents of all variables
 133  */
 134 void dump_vars(void)
 135 {
 136         struct urlcontent *u;
 137
 138         for (u = WC->urlstrings; u != NULL; u = u->next) {
 139                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 140         }
 141 }
 142
 143 char *bstr(char *key)
 144 {
 145         struct urlcontent *u;
 146
 147         for (u = WC->urlstrings; u != NULL; u = u->next) {
 148                 if (!strcasecmp(u->url_key, key))
 149                         return (u->url_data);
 150         }
 151         return ("");
 152 }
 153
 154
 155 void wprintf(const char *format,...)
 156 {
 157         va_list arg_ptr;
 158         char wbuf[1024];
 159
 160         va_start(arg_ptr, format);
 161         vsprintf(wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         write(WC->http_sock, wbuf, strlen(wbuf));
 165 }
 166
 167
 168 /*
 169  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 170  *
 171  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 172  * append the main menu and closing tags, or 2 to
 173  * append the closing tags only.
 174  */
 175 void wDumpContent(int print_standard_html_footer)
 176 {
 177         if (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  *
 280  * Bit 3: suppress check for express messages
 281  */
 282 void output_headers(int controlcode)
 283 {
 284         char cookie[SIZ];
 285         int print_standard_html_head = 0;
 286         int refresh30 = 0;
 287         int suppress_check = 0;
 288         char httpnow[SIZ];
 289         static int pageseq = 0;
 290         print_standard_html_head        =       controlcode & 0x03;
 291         refresh30                       =       ((controlcode & 0x04) >> 2);
 292         suppress_check                  =       ((controlcode & 0x08) >> 3);
 293
 294         wprintf("HTTP/1.0 200 OK\n");
 295
 296         httpdate(httpnow, time(NULL));
 297
 298         if (print_standard_html_head > 0) {
 299                 wprintf("Content-type: text/html\n"
 300                         "Server: %s\n", SERVER
 301                 );
 302                 wprintf("Connection: close\n"
 303                         "Pragma: no-cache\n"
 304                         "Cache-Control: no-store\n"
 305                 );
 306         }
 307         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 308                         WC->wc_password, WC->wc_roomname);
 309         if (print_standard_html_head == 2) {
 310                 wprintf("Set-cookie: webcit=%s\n", unset);
 311         } else {
 312                 wprintf("Set-cookie: webcit=%s\n", cookie);
 313                 if (server_cookie != NULL) {
 314                         wprintf("%s\n", server_cookie);
 315                 }
 316         }
 317
 318         if (print_standard_html_head > 0) {
 319                 wprintf("\n");
 320
 321                 if (refresh30) svprintf("REFRESHTAG", WCS_STRING,
 322                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 323                 else svprintf("REFRESHTAG", WCS_STRING,
 324                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 325                 /* script for checking for pages (not always launched) */
 326                 svprintf("PAGERSCRIPT", WCS_STRING,
 327                         "<SCRIPT LANGUAGE=\"JavaScript\">\n"
 328                         "function launch_page_popup() {\n"
 329                         "pwin = window.open('/page_popup', 'CitaPage%d', "
 330                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 331                         "scrollbars=yes,resizable=no,height=250,width=400');\n"
 332                         "}\n"
 333                         "</SCRIPT>\n",
 334                         ++pageseq
 335                 );
 336                 /* end script */
 337
 338                 do_template("head");
 339                 clear_local_substs();
 340
 341                 if (!suppress_check) if (WC->HaveExpressMessages) {
 342                         svprintf("extrabodyparms", WCS_STRING, "%s",
 343                                 "onload=\"launch_page_popup()\" ");
 344                         WC->HaveExpressMessages = 0;
 345                 }
 346
 347                 do_template("background");
 348                 clear_local_substs();
 349
 350         if (print_standard_html_head == 1) {
 351                 wprintf("<A NAME=\"TheTop\"></A>");
 352
 353                 embed_room_banner(NULL);
 354
 355                 }
 356         }
 357 }
 358
 359
 360 /*
 361  *
 362  */
 363 void http_redirect(char *whichpage) {
 364         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 365         wprintf("Location: %s\n", whichpage);
 366         wprintf("URI: %s\n", whichpage);
 367         wprintf("Content-type: text/html\n\n");
 368         wprintf("<html><body>\n");
 369         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 370                 whichpage);
 371         wprintf("</body></html>\n");
 372 }
 373
 374
 375
 376 void check_for_express_messages()
 377 {
 378         char buf[SIZ];
 379
 380         serv_puts("NOOP");
 381         serv_gets(buf);
 382         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 383 }
 384
 385
 386
 387
 388 /*
 389  * Output a piece of content to the web browser
 390  */
 391 void http_transmit_thing(char *thing, size_t length, char *content_type) {
 392         output_headers(0);
 393         wprintf("Content-type: %s\n"
 394                 "Content-length: %ld\n"
 395                 "Server: %s\n"
 396                 "Connection: close\n"
 397                 "\n",
 398                 content_type,
 399                 (long) length,
 400                 SERVER
 401         );
 402         write(WC->http_sock, thing, (size_t)length);
 403 }
 404
 405
 406
 407
 408 void output_static(char *what)
 409 {
 410         char buf[4096];
 411         FILE *fp;
 412         struct stat statbuf;
 413         off_t bytes;
 414         char *bigbuffer;
 415         char content_type[SIZ];
 416
 417         sprintf(buf, "static/%s", what);
 418         fp = fopen(buf, "rb");
 419         if (fp == NULL) {
 420                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 421                 wprintf("Content-Type: text/plain\n");
 422                 wprintf("\n");
 423                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 424         } else {
 425                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 426                         strcpy(content_type, "image/gif");
 427                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 428                         strcpy(content_type, "text/plain");
 429                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 430                         strcpy(content_type, "text/css");
 431                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 432                         strcpy(content_type, "image/jpeg");
 433                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 434                         strcpy(content_type, "image/png");
 435                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 436                         strcpy(content_type, "text/html");
 437                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 438                         strcpy(content_type, "text/vnd.wap.wml");
 439                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 440                         strcpy(content_type, "text/vnd.wap.wmlscript");
 441                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 442                         strcpy(content_type, "application/vnd.wap.wmlc");
 443                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 444                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 445                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 446                         wprintf("Content-type: image/vnd.wap.wbmp");
 447                 else
 448                         wprintf("Content-type: application/octet-stream");
 449
 450                 fstat(fileno(fp), &statbuf);
 451                 bytes = statbuf.st_size;
 452                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 453                 bigbuffer = malloc(bytes);
 454                 fread(bigbuffer, bytes, 1, fp);
 455                 fclose(fp);
 456
 457                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type);
 458                 free(bigbuffer);
 459         }
 460         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 461                 end_webcit_session();
 462         }
 463 }
 464
 465
 466 /*
 467  * When the browser requests an image file from the Citadel server,
 468  * this function is called to transmit it.
 469  */
 470 void output_image()
 471 {
 472         char buf[SIZ];
 473         char *xferbuf = NULL;
 474         off_t bytes;
 475         off_t thisblock;
 476         off_t accomplished = 0L;
 477
 478         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 479         serv_gets(buf);
 480         if (buf[0] == '2') {
 481                 bytes = extract_long(&buf[4], 0);
 482                 xferbuf = malloc(bytes);
 483
 484                 /* Read it from the server */
 485                 while (bytes > (off_t) 0) {
 486                         thisblock = 4096;
 487                         if (thisblock > bytes) {
 488                                 thisblock = bytes;
 489                         }
 490                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 491                         serv_gets(buf);
 492                         if (buf[0] == '6') {
 493                                 thisblock = extract_long(&buf[4], 0);
 494                                 serv_read(&xferbuf[accomplished],
 495                                         (int) thisblock);
 496                         }
 497                         else {
 498                                 memset(&xferbuf[accomplished], 0, thisblock);
 499                         }
 500                         bytes = bytes - thisblock;
 501                         accomplished += thisblock;
 502                 }
 503                 serv_puts("CLOS");
 504                 serv_gets(buf);
 505
 506                 /* Write it to the browser */
 507                 http_transmit_thing(xferbuf, (size_t)accomplished,
 508                                         "image/gif");
 509
 510         } else {
 511                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 512                 output_headers(0);
 513                 wprintf("Content-Type: text/plain\n"
 514                         "\n"
 515                         "Error retrieving image: %s\n",
 516                         &buf[4]
 517                 );
 518         }
 519
 520         if (xferbuf) {
 521                 free(xferbuf);
 522         }
 523
 524
 525 }
 526
 527 /*
 528  */
 529 void output_mimepart()
 530 {
 531         char buf[SIZ];
 532         char xferbuf[4096];
 533         off_t bytes;
 534         off_t thisblock;
 535         off_t accomplished = 0L;
 536         char content_type[SIZ];
 537
 538         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 539         serv_gets(buf);
 540         if (buf[0] == '2') {
 541                 bytes = extract_long(&buf[4], 0);
 542                 extract(content_type, &buf[4], 3);
 543                 output_headers(0);
 544                 wprintf("Content-type: %s\n", content_type);
 545                 wprintf("Content-length: %ld\n", (long) bytes);
 546                 wprintf("\n");
 547
 548                 while (bytes > (off_t) 0) {
 549                         thisblock = (off_t) sizeof(xferbuf);
 550                         if (thisblock > bytes) {
 551                                 thisblock = bytes;
 552                         }
 553                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 554                         serv_gets(buf);
 555                         if (buf[0] == '6') {
 556                                 thisblock = extract_long(&buf[4], 0);
 557                                 serv_read(xferbuf, (int) thisblock);
 558                         }
 559                         else {
 560                                 memset(xferbuf, 0, thisblock);
 561                         }
 562                         write(WC->http_sock, xferbuf, thisblock);
 563                         bytes = bytes - thisblock;
 564                         accomplished = accomplished + thisblock;
 565                 }
 566                 serv_puts("CLOS");
 567                 serv_gets(buf);
 568         } else {
 569                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 570                 output_headers(0);
 571                 wprintf("Content-Type: text/plain\n");
 572                 wprintf("\n");
 573                 wprintf("Error retrieving part: %s\n", &buf[4]);
 574         }
 575
 576 }
 577
 578
 579 /*
 580  */
 581 char *load_mimepart(long msgnum, char *partnum)
 582 {
 583         char buf[SIZ];
 584         off_t bytes;
 585         off_t thisblock;
 586         off_t accomplished = 0L;
 587         char content_type[SIZ];
 588         char *content;
 589
 590         serv_printf("OPNA %ld|%s", msgnum, partnum);
 591         serv_gets(buf);
 592         if (buf[0] == '2') {
 593                 bytes = extract_long(&buf[4], 0);
 594                 extract(content_type, &buf[4], 3);
 595
 596                 content = malloc(bytes + 1);
 597
 598                 while (bytes > (off_t) 0) {
 599                         thisblock = bytes;
 600                         if (thisblock > 4096L) {
 601                                 thisblock = 4096L;
 602                         }
 603                         if (thisblock > bytes) {
 604                                 thisblock = bytes;
 605                         }
 606                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 607                         serv_gets(buf);
 608                         if (buf[0] == '6') {
 609                                 thisblock = extract_long(&buf[4], 0);
 610                                 serv_read(&content[accomplished], (int) thisblock);
 611                         }
 612                         else {
 613                                 memset(&content[accomplished], 0, thisblock);
 614                         }
 615                         bytes = bytes - thisblock;
 616                         accomplished = accomplished + thisblock;
 617                 }
 618                 serv_puts("CLOS");
 619                 serv_gets(buf);
 620                 content[accomplished] = 0;      /* null terminate for good measure */
 621                 return(content);
 622         }
 623         else {
 624                 return(NULL);
 625         }
 626
 627 }
 628
 629
 630 /*
 631  * Convenience functions to display a page containing only a string
 632  */
 633 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 634 {
 635         wprintf("HTTP/1.0 200 OK\n");
 636         output_headers(1);
 637         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 638         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 639         wprintf("<B>%s</B>\n", titlebarmsg);
 640         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 641         escputs(messagetext);
 642
 643         wprintf("<HR>\n");
 644         wDumpContent(1);
 645 }
 646
 647
 648 /*
 649  * Display a blank page.
 650  */
 651 void blank_page(void) {
 652         output_headers(7);
 653         wDumpContent(2);
 654 }
 655
 656
 657
 658
 659 /*
 660  * Offer to make any page the user's "start page."
 661  */
 662 void offer_start_page(void) {
 663         wprintf("<A HREF=\"/change_start_page?startpage=");
 664         urlescputs(WC->this_page);
 665         wprintf("\">"
 666                 "<FONT SIZE=-2 COLOR=#AAAAAA>Make this my start page</FONT>"
 667                 "</A>"
 668         );
 669 }
 670
 671
 672 /*
 673  * Change the user's start page
 674  */
 675 void change_start_page(void) {
 676
 677         if (bstr("startpage") == NULL) {
 678                 display_error("startpage set to null");
 679                 return;
 680         }
 681
 682         set_preference("startpage", bstr("startpage"));
 683
 684         output_headers(3);
 685         do_template("newstartpage");
 686         wDumpContent(1);
 687 }
 688
 689
 690
 691
 692 void display_error(char *errormessage)
 693 {
 694         convenience_page("770000", "Error", errormessage);
 695 }
 696
 697 void display_success(char *successmessage)
 698 {
 699         convenience_page("007700", "OK", successmessage);
 700 }
 701
 702
 703
 704 void extract_action(char *actbuf, char *cmdbuf)
 705 {
 706         int i;
 707
 708         strcpy(actbuf, cmdbuf);
 709         if (!strncasecmp(actbuf, "GET /", 5))
 710                 strcpy(actbuf, &actbuf[5]);
 711         if (!strncasecmp(actbuf, "PUT /", 5))
 712                 strcpy(actbuf, &actbuf[5]);
 713         if (!strncasecmp(actbuf, "POST /", 6))
 714                 strcpy(actbuf, &actbuf[6]);
 715
 716         for (i = 0; i < strlen(actbuf); ++i) {
 717                 if (actbuf[i] == ' ') {
 718                         actbuf[i] = 0;
 719                         i = 0;
 720                 }
 721                 if (actbuf[i] == '/') {
 722                         actbuf[i] = 0;
 723                         i = 0;
 724                 }
 725                 if (actbuf[i] == '?') {
 726                         actbuf[i] = 0;
 727                         i = 0;
 728                 }
 729                 if (actbuf[i] == '&') {
 730                         actbuf[i] = 0;
 731                         i = 0;
 732                 }
 733         }
 734 }
 735
 736
 737 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 738                         void *content, char *cbtype, size_t length,
 739                         char *encoding, void *userdata)
 740 {
 741
 742         lprintf(5, "UPLOAD HANDLER CALLED\n");
 743         lprintf(5, "    name = %s\n", name);
 744         lprintf(5, "filename = %s\n", filename);
 745         lprintf(5, "encoding = %s\n", encoding);
 746         lprintf(5, "    type = %s\n", cbtype);
 747         lprintf(5, "  length = %ld\n", (long)length);
 748
 749         if (length > 0) {
 750                 WC->upload = malloc(length);
 751                 if (WC->upload != NULL) {
 752                         WC->upload_length = length;
 753                         memcpy(WC->upload, content, length);
 754                 }
 755                 else {
 756                         lprintf(9, "malloc() failed: %s\n",
 757                                 strerror(errno));
 758                 }
 759         }
 760 }
 761
 762
 763
 764
 765 /*
 766  * Entry point for WebCit transaction
 767  */
 768 void session_loop(struct httprequest *req)
 769 {
 770         char cmd[SIZ];
 771         char action[SIZ];
 772         char buf[SIZ];
 773         int a, b;
 774         int ContentLength = 0;
 775         int BytesRead;
 776         char ContentType[512];
 777         char *content;
 778         char *content_end;
 779         struct httprequest *hptr;
 780         char browser_host[SIZ];
 781         char user_agent[SIZ];
 782
 783         /* We stuff these with the values coming from the client cookies,
 784          * so we can use them to reconnect a timed out session if we have to.
 785          */
 786         char c_host[SIZ];
 787         char c_port[SIZ];
 788         char c_username[SIZ];
 789         char c_password[SIZ];
 790         char c_roomname[SIZ];
 791         char cookie[SIZ];
 792
 793         strcpy(c_host, defaulthost);
 794         strcpy(c_port, defaultport);
 795         strcpy(c_username, "");
 796         strcpy(c_password, "");
 797         strcpy(c_roomname, "");
 798
 799         WC->upload_length = 0;
 800         WC->upload = NULL;
 801
 802         WC->is_wap = 0;
 803
 804         hptr = req;
 805         if (hptr == NULL) return;
 806
 807         strcpy(cmd, hptr->line);
 808         hptr = hptr->next;
 809         extract_action(action, cmd);
 810
 811         while (hptr != NULL) {
 812                 strcpy(buf, hptr->line);
 813                 hptr = hptr->next;
 814
 815                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 816                         strcpy(cookie, &buf[15]);
 817                         cookie_to_stuff(cookie, NULL,
 818                                       c_username, c_password, c_roomname);
 819                 }
 820                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 821                         ContentLength = atoi(&buf[16]);
 822                 }
 823                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 824                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 825                 }
 826                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 827                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 828                 }
 829                 else if (!strncasecmp(buf, "Host: ", 6)) {
 830                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 831                 }
 832                 /* Only WAP gateways explicitly name this content-type */
 833                 else if (strstr(buf, "text/vnd.wap.wml")) {
 834                         WC->is_wap = 1;
 835                 }
 836         }
 837
 838         if (ContentLength > 0) {
 839                 lprintf(5, "Content length: %d\n", ContentLength);
 840                 content = malloc(ContentLength + 1);
 841                 memset(content, 0, ContentLength+1);
 842                 BytesRead = 0;
 843
 844                 while (BytesRead < ContentLength) {
 845                         a=read(WC->http_sock, &content[BytesRead],
 846                                 ContentLength - BytesRead);
 847                         if (a <= 0) BytesRead = ContentLength;
 848                         else BytesRead += a;
 849                 }
 850
 851                 if (!strncasecmp(ContentType,
 852                               "application/x-www-form-urlencoded", 33)) {
 853                         addurls(content);
 854                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 855                         content_end = content + ContentLength;
 856                         mime_parser(content, content_end, *upload_handler,
 857                                         NULL, NULL, NULL, 0);
 858                 }
 859         } else {
 860                 content = NULL;
 861         }
 862
 863         /* make a note of where we are in case the user wants to save it */
 864         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 865         remove_token(WC->this_page, 2, ' ');
 866         remove_token(WC->this_page, 0, ' ');
 867
 868         /* If there are variables in the URL, we must grab them now */
 869         for (a = 0; a < strlen(cmd); ++a) {
 870                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 871                         for (b = a; b < strlen(cmd); ++b)
 872                                 if (isspace(cmd[b]))
 873                                         cmd[b] = 0;
 874                         addurls(&cmd[a + 1]);
 875                         cmd[a] = 0;
 876                 }
 877         }
 878
 879         /*
 880          * If we're not connected to a Citadel server, try to hook up the
 881          * connection now.  Preference is given to the host and port specified
 882          * by browser cookies, if cookies have been supplied.
 883          */
 884         if (!WC->connected) {
 885                 if (strlen(bstr("host")) > 0)
 886                         strcpy(c_host, bstr("host"));
 887                 if (strlen(bstr("port")) > 0)
 888                         strcpy(c_port, bstr("port"));
 889
 890                 if (!strcasecmp(c_host, "uds")) {
 891                         /* unix domain socket */
 892                         sprintf(buf, "%s/citadel.socket", c_port);
 893                         WC->serv_sock = uds_connectsock(buf);
 894                 }
 895                 else {
 896                         /* tcp socket */
 897                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 898                 }
 899
 900                 if (WC->serv_sock < 0) {
 901                         do_logout();
 902                         goto SKIP_ALL_THIS_CRAP;
 903                 }
 904                 else {
 905                         WC->connected = 1;
 906                         serv_gets(buf); /* get the server welcome message */
 907                         locate_host(browser_host, WC->http_sock);
 908                         get_serv_info(browser_host, user_agent);
 909                 }
 910         }
 911
 912         /*
 913          * Functions which can be performed without logging in
 914          */
 915         if (!strcasecmp(action, "listsub")) {
 916                 do_listsub();
 917                 goto SKIP_ALL_THIS_CRAP;
 918         }
 919
 920         check_for_express_messages();
 921
 922         /*
 923          * If we're not logged in, but we have username and password cookies
 924          * supplied by the browser, try using them to log in.
 925          */
 926         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 927                 serv_printf("USER %s", c_username);
 928                 serv_gets(buf);
 929                 if (buf[0] == '3') {
 930                         serv_printf("PASS %s", c_password);
 931                         serv_gets(buf);
 932                         if (buf[0] == '2') {
 933                                 become_logged_in(c_username, c_password, buf);
 934                         }
 935                 }
 936         }
 937         /*
 938          * If we don't have a current room, but a cookie specifying the
 939          * current room is supplied, make an effort to go there.
 940          */
 941         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 942                 serv_printf("GOTO %s", c_roomname);
 943                 serv_gets(buf);
 944                 if (buf[0] == '2') {
 945                         strcpy(WC->wc_roomname, c_roomname);
 946                 }
 947         }
 948         if (!strcasecmp(action, "static")) {
 949                 strcpy(buf, &cmd[12]);
 950                 for (a = 0; a < strlen(buf); ++a)
 951                         if (isspace(buf[a]))
 952                                 buf[a] = 0;
 953                 output_static(buf);
 954         } else if (!strcasecmp(action, "image")) {
 955                 output_image();
 956
 957         /*
 958          * All functions handled below this point ... make sure we log in
 959          * before doing anything else!
 960          */
 961         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 962                 do_login();
 963         } else if (!WC->logged_in) {
 964                 display_login(NULL);
 965         }
 966
 967         /*
 968          * Various commands...
 969          */
 970
 971         else if (!strcasecmp(action, "do_welcome")) {
 972                 do_welcome();
 973         } else if (!strcasecmp(action, "blank")) {
 974                 blank_page();
 975         } else if (!strcasecmp(action, "display_main_menu")) {
 976                 display_main_menu();
 977         } else if (!strcasecmp(action, "whobbs")) {
 978                 whobbs();
 979         } else if (!strcasecmp(action, "knrooms")) {
 980                 knrooms();
 981         } else if (!strcasecmp(action, "gotonext")) {
 982                 slrp_highest();
 983                 gotonext();
 984         } else if (!strcasecmp(action, "skip")) {
 985                 gotonext();
 986         } else if (!strcasecmp(action, "ungoto")) {
 987                 ungoto();
 988         } else if (!strcasecmp(action, "dotgoto")) {
 989                 slrp_highest();
 990                 smart_goto(bstr("room"));
 991         } else if (!strcasecmp(action, "dotskip")) {
 992                 smart_goto(bstr("room"));
 993         } else if (!strcasecmp(action, "termquit")) {
 994                 do_logout();
 995         } else if (!strcasecmp(action, "readnew")) {
 996                 readloop("readnew");
 997         } else if (!strcasecmp(action, "readold")) {
 998                 readloop("readold");
 999         } else if (!strcasecmp(action, "readfwd")) {
1000                 readloop("readfwd");
1001         } else if (!strcasecmp(action, "headers")) {
1002                 readloop("headers");
1003         } else if (!strcasecmp(action, "display_enter")) {
1004                 display_enter();
1005         } else if (!strcasecmp(action, "post")) {
1006                 post_message();
1007         } else if (!strcasecmp(action, "delete_msg")) {
1008                 delete_msg();
1009         } else if (!strcasecmp(action, "confirm_move_msg")) {
1010                 confirm_move_msg();
1011         } else if (!strcasecmp(action, "move_msg")) {
1012                 move_msg();
1013         } else if (!strcasecmp(action, "userlist")) {
1014                 userlist();
1015         } else if (!strcasecmp(action, "showuser")) {
1016                 showuser();
1017         } else if (!strcasecmp(action, "display_page")) {
1018                 display_page();
1019         } else if (!strcasecmp(action, "page_user")) {
1020                 page_user();
1021         } else if (!strcasecmp(action, "chat")) {
1022                 do_chat();
1023         } else if (!strcasecmp(action, "display_private")) {
1024                 display_private("", 0);
1025         } else if (!strcasecmp(action, "goto_private")) {
1026                 goto_private();
1027         } else if (!strcasecmp(action, "zapped_list")) {
1028                 zapped_list();
1029         } else if (!strcasecmp(action, "display_zap")) {
1030                 display_zap();
1031         } else if (!strcasecmp(action, "zap")) {
1032                 zap();
1033         } else if (!strcasecmp(action, "display_entroom")) {
1034                 display_entroom();
1035         } else if (!strcasecmp(action, "entroom")) {
1036                 entroom();
1037         } else if (!strcasecmp(action, "display_editroom")) {
1038                 display_editroom();
1039         } else if (!strcasecmp(action, "netedit")) {
1040                 netedit();
1041         } else if (!strcasecmp(action, "editroom")) {
1042                 editroom();
1043         } else if (!strcasecmp(action, "display_whok")) {
1044                 display_whok();
1045         } else if (!strcasecmp(action, "display_editinfo")) {
1046                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
1047         } else if (!strcasecmp(action, "editinfo")) {
1048                 save_edit("Room info", "EINF 1", 1);
1049         } else if (!strcasecmp(action, "display_editbio")) {
1050                 sprintf(buf, "RBIO %s", WC->wc_username);
1051                 display_edit("Your bio", "NOOP", buf, "editbio");
1052         } else if (!strcasecmp(action, "editbio")) {
1053                 save_edit("Your bio", "EBIO", 0);
1054         } else if (!strcasecmp(action, "confirm_delete_room")) {
1055                 confirm_delete_room();
1056         } else if (!strcasecmp(action, "delete_room")) {
1057                 delete_room();
1058         } else if (!strcasecmp(action, "validate")) {
1059                 validate();
1060         } else if (!strcasecmp(action, "display_editpic")) {
1061                 display_graphics_upload("your photo",
1062                                         "UIMG 0|_userpic_",
1063                                         "/editpic");
1064         } else if (!strcasecmp(action, "editpic")) {
1065                 do_graphics_upload("UIMG 1|_userpic_");
1066         } else if (!strcasecmp(action, "display_editroompic")) {
1067                 display_graphics_upload("the graphic for this room",
1068                                         "UIMG 0|_roompic_",
1069                                         "/editroompic");
1070         } else if (!strcasecmp(action, "editroompic")) {
1071                 do_graphics_upload("UIMG 1|_roompic_");
1072         } else if (!strcasecmp(action, "delete_floor")) {
1073                 delete_floor();
1074         } else if (!strcasecmp(action, "rename_floor")) {
1075                 rename_floor();
1076         } else if (!strcasecmp(action, "create_floor")) {
1077                 create_floor();
1078         } else if (!strcasecmp(action, "display_editfloorpic")) {
1079                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1080                         bstr("which_floor"));
1081                 display_graphics_upload("the graphic for this floor",
1082                                         buf,
1083                                         "/editfloorpic");
1084         } else if (!strcasecmp(action, "editfloorpic")) {
1085                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1086                         bstr("which_floor"));
1087                 do_graphics_upload(buf);
1088         } else if (!strcasecmp(action, "display_reg")) {
1089                 display_reg(0);
1090         } else if (!strcasecmp(action, "register")) {
1091                 register_user();
1092         } else if (!strcasecmp(action, "display_changepw")) {
1093                 display_changepw();
1094         } else if (!strcasecmp(action, "changepw")) {
1095                 changepw();
1096         } else if (!strcasecmp(action, "display_edit_node")) {
1097                 display_edit_node();
1098         } else if (!strcasecmp(action, "edit_node")) {
1099                 edit_node();
1100         } else if (!strcasecmp(action, "display_netconf")) {
1101                 display_netconf();
1102         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1103                 display_confirm_delete_node();
1104         } else if (!strcasecmp(action, "delete_node")) {
1105                 delete_node();
1106         } else if (!strcasecmp(action, "display_add_node")) {
1107                 display_add_node();
1108         } else if (!strcasecmp(action, "add_node")) {
1109                 add_node();
1110         } else if (!strcasecmp(action, "terminate_session")) {
1111                 slrp_highest();
1112                 terminate_session();
1113         } else if (!strcasecmp(action, "edit_me")) {
1114                 edit_me();
1115         } else if (!strcasecmp(action, "display_siteconfig")) {
1116                 display_siteconfig();
1117         } else if (!strcasecmp(action, "page_popup")) {
1118                 page_popup();
1119         } else if (!strcasecmp(action, "siteconfig")) {
1120                 siteconfig();
1121         } else if (!strcasecmp(action, "display_generic")) {
1122                 display_generic();
1123         } else if (!strcasecmp(action, "do_generic")) {
1124                 do_generic();
1125         } else if (!strcasecmp(action, "display_menubar")) {
1126                 display_menubar(1);
1127         } else if (!strcasecmp(action, "output_mimepart")) {
1128                 output_mimepart();
1129         } else if (!strcasecmp(action, "edit_vcard")) {
1130                 edit_vcard();
1131         } else if (!strcasecmp(action, "submit_vcard")) {
1132                 submit_vcard();
1133         } else if (!strcasecmp(action, "select_user_to_edit")) {
1134                 select_user_to_edit(NULL, NULL);
1135         } else if (!strcasecmp(action, "display_edituser")) {
1136                 display_edituser(NULL);
1137         } else if (!strcasecmp(action, "edituser")) {
1138                 edituser();
1139         } else if (!strcasecmp(action, "create_user")) {
1140                 create_user();
1141         } else if (!strcasecmp(action, "changeview")) {
1142                 change_view();
1143         } else if (!strcasecmp(action, "folders")) {
1144                 folders();
1145         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1146                 do_stuff_to_msgs();
1147         } else if (!strcasecmp(action, "change_start_page")) {
1148                 change_start_page();
1149         } else if (!strcasecmp(action, "display_floorconfig")) {
1150                 display_floorconfig(NULL);
1151         } else if (!strcasecmp(action, "toggle_self_service")) {
1152                 toggle_self_service();
1153 #ifdef HAVE_ICAL_H
1154         } else if (!strcasecmp(action, "display_edit_task")) {
1155                 display_edit_task();
1156         } else if (!strcasecmp(action, "save_task")) {
1157                 save_task();
1158         } else if (!strcasecmp(action, "display_edit_event")) {
1159                 display_edit_event();
1160         } else if (!strcasecmp(action, "save_event")) {
1161                 save_event();
1162         } else if (!strcasecmp(action, "respond_to_request")) {
1163                 respond_to_request();
1164 #endif
1165         } else if (!strcasecmp(action, "summary")) {
1166                 summary();
1167         } else if (!strcasecmp(action, "diagnostics")) {
1168                 output_headers(1);
1169
1170                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1171                 wprintf("Command: <BR><PRE>\n");
1172                 escputs(cmd);
1173                 wprintf("</PRE><HR>\n");
1174                 wprintf("Variables: <BR><PRE>\n");
1175                 dump_vars();
1176                 wprintf("</PRE><HR>\n");
1177                 wDumpContent(1);
1178         }
1179         /* When all else fais, display the main menu. */
1180         else {
1181                 display_main_menu();
1182         }
1183
1184 SKIP_ALL_THIS_CRAP:
1185         fflush(stdout);
1186         if (content != NULL) {
1187                 free(content);
1188                 content = NULL;
1189         }
1190         free_urls();
1191         if (WC->upload_length > 0) {
1192                 free(WC->upload);
1193                 WC->upload_length = 0;
1194         }
1195
1196 }