webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  *
   8  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32 #include "webserver.h"
  33 #include "mime_parser.h"
  34
  35 /*
  36  * String to unset the cookie.
  37  * Any date "in the past" will work, so I chose my birthday, right down to
  38  * the exact minute.  :)
  39  */
  40 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  41
  42 void unescape_input(char *buf)
  43 {
  44         int a, b;
  45         char hex[3];
  46
  47         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  48                 buf[strlen(buf) - 1] = 0;
  49
  50         for (a = 0; a < strlen(buf); ++a) {
  51                 if (buf[a] == '+')
  52                         buf[a] = ' ';
  53                 if (buf[a] == '%') {
  54                         hex[0] = buf[a + 1];
  55                         hex[1] = buf[a + 2];
  56                         hex[2] = 0;
  57                         sscanf(hex, "%02x", &b);
  58                         buf[a] = (char) b;
  59                         strcpy(&buf[a + 1], &buf[a + 3]);
  60                 }
  61         }
  62
  63 }
  64
  65
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (strlen(up) > 0) {
  75
  76                 /* locate the = sign */
  77                 safestrncpy(buf, up, sizeof buf);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 strcpy(u->url_key, buf);
  90
  91                 /* now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /* locate the & sign */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if (!strncmp(ptr, "&", 1)) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up;
 106                 for (a = 0; a < b; ++a)
 107                         ++ptr;
 108                 strcpy(ptr, "");
 109
 110                 u->url_data = malloc(strlen(up) + 1);
 111                 strcpy(u->url_data, up);
 112                 u->url_data[b] = 0;
 113                 unescape_input(u->url_data);
 114                 up = ptr;
 115                 ++up;
 116         }
 117 }
 118
 119 void free_urls(void)
 120 {
 121         struct urlcontent *u;
 122
 123         while (WC->urlstrings != NULL) {
 124                 free(WC->urlstrings->url_data);
 125                 u = WC->urlstrings->next;
 126                 free(WC->urlstrings);
 127                 WC->urlstrings = u;
 128         }
 129 }
 130
 131 /*
 132  * Diagnostic function to display the contents of all variables
 133  */
 134 void dump_vars(void)
 135 {
 136         struct urlcontent *u;
 137
 138         for (u = WC->urlstrings; u != NULL; u = u->next) {
 139                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 140         }
 141 }
 142
 143 char *bstr(char *key)
 144 {
 145         struct urlcontent *u;
 146
 147         for (u = WC->urlstrings; u != NULL; u = u->next) {
 148                 if (!strcasecmp(u->url_key, key))
 149                         return (u->url_data);
 150         }
 151         return ("");
 152 }
 153
 154
 155 void wprintf(const char *format,...)
 156 {
 157         va_list arg_ptr;
 158         char wbuf[1024];
 159
 160         va_start(arg_ptr, format);
 161         vsprintf(wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         write(WC->http_sock, wbuf, strlen(wbuf));
 165 }
 166
 167
 168 /*
 169  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 170  *
 171  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 172  * append the main menu and closing tags, or 2 to
 173  * append the closing tags only.
 174  */
 175 void wDumpContent(int print_standard_html_footer)
 176 {
 177         if (WC->fake_frames) {
 178                 wprintf("</TABLE>\n");
 179                 WC->fake_frames = 0;
 180         }
 181
 182         if (print_standard_html_footer) {
 183                 if (print_standard_html_footer != 2) {
 184                         wprintf("<BR>");
 185                 }
 186                 wprintf("</BODY></HTML>\n");
 187         }
 188
 189
 190 }
 191
 192
 193 /*
 194  * Copy a string, escaping characters which have meaning in HTML.  If
 195  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 196  */
 197 void stresc(char *target, char *strbuf, int nbsp)
 198 {
 199         int a;
 200         strcpy(target, "");
 201
 202         for (a = 0; a < strlen(strbuf); ++a) {
 203                 if (strbuf[a] == '<')
 204                         strcat(target, "&lt;");
 205                 else if (strbuf[a] == '>')
 206                         strcat(target, "&gt;");
 207                 else if (strbuf[a] == '&')
 208                         strcat(target, "&amp;");
 209                 else if (strbuf[a] == '\"')
 210                         strcat(target, "&quot;");
 211                 else if (strbuf[a] == '\'')
 212                         strcat(target, "&#39;");
 213                 else if (strbuf[a] == LB)
 214                         strcat(target, "<");
 215                 else if (strbuf[a] == RB)
 216                         strcat(target, ">");
 217                 else if (strbuf[a] == QU)
 218                         strcat(target, "\"");
 219                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 220                         strcat(target, "&nbsp;");
 221                 } else {
 222                         strncat(target, &strbuf[a], 1);
 223                 }
 224         }
 225 }
 226
 227 void escputs1(char *strbuf, int nbsp)
 228 {
 229         char buf[1024];
 230         stresc(buf, strbuf, nbsp);
 231         wprintf("%s", buf);
 232 }
 233
 234 void escputs(char *strbuf)
 235 {
 236         escputs1(strbuf, 0);
 237 }
 238
 239 /*
 240  * Escape a string for feeding out as a URL.
 241  * Returns a pointer to a buffer that must be freed by the caller!
 242  */
 243 void urlesc(char *outbuf, char *strbuf)
 244 {
 245         int a, b, c;
 246         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 247
 248         strcpy(outbuf, "");
 249
 250         for (a = 0; a < strlen(strbuf); ++a) {
 251                 c = 0;
 252                 for (b = 0; b < strlen(ec); ++b) {
 253                         if (strbuf[a] == ec[b])
 254                                 c = 1;
 255                 }
 256                 b = strlen(outbuf);
 257                 if (c == 1)
 258                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 259                 else
 260                         sprintf(&outbuf[b], "%c", strbuf[a]);
 261         }
 262 }
 263
 264 void urlescputs(char *strbuf)
 265 {
 266         char outbuf[SIZ];
 267
 268         urlesc(outbuf, strbuf);
 269         wprintf("%s", outbuf);
 270 }
 271
 272
 273
 274
 275 /*
 276  * Output all that important stuff that the browser will want to see
 277  *
 278  * control codes:
 279  *
 280  * Bits 0 and 1:
 281  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 282  * 1 = HTTP headers plus the room banner
 283  * 2 = HTTP headers required to terminate the session (unset cookies)
 284  * 3 = HTTP and HTML headers, but no room banner
 285  *
 286  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 287  *
 288  * Bit 3: suppress check for express messages
 289  */
 290 void output_headers(int controlcode)
 291 {
 292         char cookie[SIZ];
 293         int print_standard_html_head = 0;
 294         int refresh30 = 0;
 295         int suppress_check = 0;
 296         char httpnow[SIZ];
 297         static int pageseq = 0;
 298
 299         print_standard_html_head        =       controlcode & 0x03;
 300         refresh30                       =       ((controlcode & 0x04) >> 2);
 301         suppress_check                  =       ((controlcode & 0x08) >> 3);
 302
 303         wprintf("HTTP/1.0 200 OK\n");
 304
 305         httpdate(httpnow, time(NULL));
 306
 307         if (print_standard_html_head > 0) {
 308                 wprintf("Content-type: text/html\n");
 309                 wprintf("Server: %s\n", SERVER);
 310                 wprintf("Connection: close\n");
 311                 wprintf("Pragma: no-cache\n");
 312                 wprintf("Cache-Control: no-store\n");
 313         }
 314         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 315                         WC->wc_password, WC->wc_roomname);
 316         if (print_standard_html_head == 2) {
 317                 wprintf("Set-cookie: webcit=%s\n", unset);
 318         } else {
 319                 wprintf("Set-cookie: webcit=%s\n", cookie);
 320                 if (server_cookie != NULL) {
 321                         wprintf("%s\n", server_cookie);
 322                 }
 323         }
 324
 325         if (print_standard_html_head > 0) {
 326                 wprintf("\n");
 327                 wprintf("<HTML><HEAD><TITLE>");
 328                 escputs(serv_info.serv_humannode);
 329                 wprintf("</TITLE>\n"
 330                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 331                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 332                         "<META NAME=\"MSSmartTagsPreventParsing\" CONTENT=\"TRUE\">\n");
 333                 if (refresh30) wprintf(
 334                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 335                 else wprintf(
 336                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 337                 wprintf("</HEAD>\n");
 338
 339                 /* script for checking for pages (not always launched) */
 340                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 341                 wprintf("function launch_page_popup() {\n");
 342                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 343                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 344                         "scrollbars=yes,resizable=no,height=250,width=400');\n",
 345                         ++pageseq);
 346                 wprintf("}\n");
 347                 wprintf("</SCRIPT>\n");
 348                 /* end script */
 349
 350                 /* (JavaScript keyboard-based navigation would go here) */
 351
 352                 if (!suppress_check) if (WC->HaveExpressMessages) {
 353                         svprintf("extrabodyparms", WCS_STRING, "%s",
 354                                 "onload=\"launch_page_popup()\" ");
 355                         WC->HaveExpressMessages = 0;
 356                 }
 357                 do_template("background");
 358                 clear_local_substs();
 359
 360         if (print_standard_html_head == 1) {
 361                 wprintf("<A NAME=\"TheTop\"></A>");
 362
 363                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 364                         "<TD>\n");
 365
 366                 embed_room_banner(NULL);
 367
 368                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 369
 370                 WC->fake_frames = 1;
 371                 }
 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 void output_static(char *what)
 405 {
 406         char buf[4096];
 407         FILE *fp;
 408         struct stat statbuf;
 409         off_t bytes;
 410         char *bigbuffer;
 411
 412         sprintf(buf, "static/%s", what);
 413         fp = fopen(buf, "rb");
 414         if (fp == NULL) {
 415                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 416                 wprintf("Content-Type: text/plain\n");
 417                 wprintf("\n");
 418                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 419         } else {
 420                 output_headers(0);
 421
 422                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 423                         wprintf("Content-type: image/gif\n");
 424                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 425                         wprintf("Content-type: text/plain\n");
 426                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 427                         wprintf("Content-type: text/css\n");
 428                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 429                         wprintf("Content-type: image/jpeg\n");
 430                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 431                         wprintf("Content-type: image/png\n");
 432                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 433                         wprintf("Content-type: text/html\n");
 434                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 435                         wprintf("Content-type: text/vnd.wap.wml\n");
 436                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 437                         wprintf("Content-type: text/vnd.wap.wmlscript\n");
 438                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 439                         wprintf("Content-type: application/vnd.wap.wmlc\n");
 440                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 441                         wprintf("Content-type: application/vnd.wap.wmlscriptc\n");
 442                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 443                         wprintf("Content-type: image/vnd.wap.wbmp\n");
 444                 else
 445                         wprintf("Content-type: application/octet-stream\n");
 446
 447                 fstat(fileno(fp), &statbuf);
 448                 bytes = statbuf.st_size;
 449                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 450                 wprintf("Content-length: %ld\n", (long) bytes);
 451                 wprintf("\n");
 452                 bigbuffer = malloc(bytes);
 453                 fread(bigbuffer, bytes, 1, fp);
 454                 fclose(fp);
 455                 write(WC->http_sock, bigbuffer, bytes);
 456                 free(bigbuffer);
 457         }
 458         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 459                 end_webcit_session();
 460         }
 461 }
 462
 463
 464 /*
 465  * When the browser requests an image file from the Citadel server,
 466  * this function is called to transmit it.
 467  */
 468 void output_image()
 469 {
 470         char buf[SIZ];
 471         char xferbuf[4096];
 472         off_t bytes;
 473         off_t thisblock;
 474         off_t accomplished = 0L;
 475
 476         lprintf(5, "output_image() called\n");
 477         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 478         serv_gets(buf);
 479         if (buf[0] == '2') {
 480                 bytes = extract_long(&buf[4], 0);
 481                 output_headers(0);
 482                 wprintf("Content-type: image/gif\n");
 483                 wprintf("Content-length: %ld\n", (long) bytes);
 484                 wprintf("\n");
 485
 486                 while (bytes > (off_t) 0) {
 487                         thisblock = (off_t) sizeof(xferbuf);
 488                         if (thisblock > bytes) {
 489                                 thisblock = bytes;
 490                         }
 491                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 492                         serv_gets(buf);
 493                         if (buf[0] == '6') {
 494                                 thisblock = extract_long(&buf[4], 0);
 495                                 serv_read(xferbuf, (int) thisblock);
 496                         }
 497                         else {
 498                                 memset(xferbuf, 0, thisblock);
 499                         }
 500                         write(WC->http_sock, xferbuf, thisblock);
 501                         bytes = bytes - thisblock;
 502                         accomplished = accomplished + thisblock;
 503                 }
 504                 serv_puts("CLOS");
 505                 serv_gets(buf);
 506         } else {
 507                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 508                 output_headers(0);
 509                 wprintf("Content-Type: text/plain\n");
 510                 wprintf("\n");
 511                 wprintf("Error retrieving image: %s\n", &buf[4]);
 512         }
 513
 514 }
 515
 516 /*
 517  */
 518 void output_mimepart()
 519 {
 520         char buf[SIZ];
 521         char xferbuf[4096];
 522         off_t bytes;
 523         off_t thisblock;
 524         off_t accomplished = 0L;
 525         char content_type[SIZ];
 526
 527         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 528         serv_gets(buf);
 529         if (buf[0] == '2') {
 530                 bytes = extract_long(&buf[4], 0);
 531                 extract(content_type, &buf[4], 3);
 532                 output_headers(0);
 533                 wprintf("Content-type: %s\n", content_type);
 534                 wprintf("Content-length: %ld\n", (long) bytes);
 535                 wprintf("\n");
 536
 537                 while (bytes > (off_t) 0) {
 538                         thisblock = (off_t) sizeof(xferbuf);
 539                         if (thisblock > bytes) {
 540                                 thisblock = bytes;
 541                         }
 542                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 543                         serv_gets(buf);
 544                         if (buf[0] == '6') {
 545                                 thisblock = extract_long(&buf[4], 0);
 546                                 serv_read(xferbuf, (int) thisblock);
 547                         }
 548                         else {
 549                                 memset(xferbuf, 0, thisblock);
 550                         }
 551                         write(WC->http_sock, xferbuf, thisblock);
 552                         bytes = bytes - thisblock;
 553                         accomplished = accomplished + thisblock;
 554                 }
 555                 serv_puts("CLOS");
 556                 serv_gets(buf);
 557         } else {
 558                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 559                 output_headers(0);
 560                 wprintf("Content-Type: text/plain\n");
 561                 wprintf("\n");
 562                 wprintf("Error retrieving part: %s\n", &buf[4]);
 563         }
 564
 565 }
 566
 567
 568 /*
 569  */
 570 char *load_mimepart(long msgnum, char *partnum)
 571 {
 572         char buf[SIZ];
 573         off_t bytes;
 574         off_t thisblock;
 575         off_t accomplished = 0L;
 576         char content_type[SIZ];
 577         char *content;
 578
 579         serv_printf("OPNA %ld|%s", msgnum, partnum);
 580         serv_gets(buf);
 581         if (buf[0] == '2') {
 582                 bytes = extract_long(&buf[4], 0);
 583                 extract(content_type, &buf[4], 3);
 584
 585                 content = malloc(bytes + 1);
 586
 587                 while (bytes > (off_t) 0) {
 588                         thisblock = bytes;
 589                         if (thisblock > 4096L) {
 590                                 thisblock = 4096L;
 591                         }
 592                         if (thisblock > bytes) {
 593                                 thisblock = bytes;
 594                         }
 595                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 596                         serv_gets(buf);
 597                         if (buf[0] == '6') {
 598                                 thisblock = extract_long(&buf[4], 0);
 599                                 serv_read(&content[accomplished], (int) thisblock);
 600                         }
 601                         else {
 602                                 memset(&content[accomplished], 0, thisblock);
 603                         }
 604                         bytes = bytes - thisblock;
 605                         accomplished = accomplished + thisblock;
 606                 }
 607                 serv_puts("CLOS");
 608                 serv_gets(buf);
 609                 content[accomplished] = 0;      /* null terminate for good measure */
 610                 return(content);
 611         }
 612         else {
 613                 return(NULL);
 614         }
 615
 616 }
 617
 618
 619 /*
 620  * Convenience functions to display a page containing only a string
 621  */
 622 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 623 {
 624         wprintf("HTTP/1.0 200 OK\n");
 625         output_headers(1);
 626         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 627         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 628         wprintf("<B>%s</B>\n", titlebarmsg);
 629         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 630         escputs(messagetext);
 631
 632         wprintf("<HR>\n");
 633         wDumpContent(1);
 634 }
 635
 636
 637 /*
 638  * Display a blank page.
 639  */
 640 void blank_page(void) {
 641         output_headers(7);
 642         wDumpContent(2);
 643 }
 644
 645
 646 void display_error(char *errormessage)
 647 {
 648         convenience_page("770000", "Error", errormessage);
 649 }
 650
 651 void display_success(char *successmessage)
 652 {
 653         convenience_page("007700", "OK", successmessage);
 654 }
 655
 656
 657
 658 void extract_action(char *actbuf, char *cmdbuf)
 659 {
 660         int i;
 661
 662         strcpy(actbuf, cmdbuf);
 663         if (!strncasecmp(actbuf, "GET /", 5))
 664                 strcpy(actbuf, &actbuf[5]);
 665         if (!strncasecmp(actbuf, "PUT /", 5))
 666                 strcpy(actbuf, &actbuf[5]);
 667         if (!strncasecmp(actbuf, "POST /", 6))
 668                 strcpy(actbuf, &actbuf[6]);
 669
 670         for (i = 0; i < strlen(actbuf); ++i) {
 671                 if (actbuf[i] == ' ') {
 672                         actbuf[i] = 0;
 673                         i = 0;
 674                 }
 675                 if (actbuf[i] == '/') {
 676                         actbuf[i] = 0;
 677                         i = 0;
 678                 }
 679                 if (actbuf[i] == '?') {
 680                         actbuf[i] = 0;
 681                         i = 0;
 682                 }
 683                 if (actbuf[i] == '&') {
 684                         actbuf[i] = 0;
 685                         i = 0;
 686                 }
 687         }
 688 }
 689
 690
 691 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 692                         void *content, char *cbtype, size_t length,
 693                         char *encoding, void *userdata)
 694 {
 695
 696         lprintf(5, "UPLOAD HANDLER CALLED\n");
 697         lprintf(5, "    name = %s\n", name);
 698         lprintf(5, "filename = %s\n", filename);
 699         lprintf(5, "encoding = %s\n", encoding);
 700         lprintf(5, "    type = %s\n", cbtype);
 701         lprintf(5, "  length = %ld\n", (long)length);
 702
 703         if (length > 0) {
 704                 WC->upload = malloc(length);
 705                 if (WC->upload != NULL) {
 706                         WC->upload_length = length;
 707                         memcpy(WC->upload, content, length);
 708                 }
 709                 else {
 710                         lprintf(9, "malloc() failed: %s\n",
 711                                 strerror(errno));
 712                 }
 713         }
 714 }
 715
 716
 717 /*
 718  * Entry point for WebCit transaction
 719  */
 720 void session_loop(struct httprequest *req)
 721 {
 722         char cmd[SIZ];
 723         char action[SIZ];
 724         char buf[SIZ];
 725         int a, b;
 726         int ContentLength = 0;
 727         int BytesRead;
 728         char ContentType[512];
 729         char *content;
 730         char *content_end;
 731         struct httprequest *hptr;
 732         char browser_host[SIZ];
 733         char user_agent[SIZ];
 734
 735         /* We stuff these with the values coming from the client cookies,
 736          * so we can use them to reconnect a timed out session if we have to.
 737          */
 738         char c_host[SIZ];
 739         char c_port[SIZ];
 740         char c_username[SIZ];
 741         char c_password[SIZ];
 742         char c_roomname[SIZ];
 743         char cookie[SIZ];
 744
 745         strcpy(c_host, defaulthost);
 746         strcpy(c_port, defaultport);
 747         strcpy(c_username, "");
 748         strcpy(c_password, "");
 749         strcpy(c_roomname, "");
 750
 751         WC->upload_length = 0;
 752         WC->upload = NULL;
 753
 754         WC->is_wap = 0;
 755
 756         hptr = req;
 757         if (hptr == NULL) return;
 758
 759         strcpy(cmd, hptr->line);
 760         hptr = hptr->next;
 761         extract_action(action, cmd);
 762
 763         while (hptr != NULL) {
 764                 strcpy(buf, hptr->line);
 765                 hptr = hptr->next;
 766
 767                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 768                         strcpy(cookie, &buf[15]);
 769                         cookie_to_stuff(cookie, NULL,
 770                                       c_username, c_password, c_roomname);
 771                 }
 772                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 773                         ContentLength = atoi(&buf[16]);
 774                 }
 775                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 776                         strcpy(ContentType, &buf[14]);
 777                 }
 778                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 779                         strcpy(user_agent, &buf[12]);
 780                 }
 781                 /* Only WAP gateways explicitly name this content-type */
 782                 else if (strstr(buf, "text/vnd.wap.wml")) {
 783                         WC->is_wap = 1;
 784                 }
 785         }
 786
 787         if (ContentLength > 0) {
 788                 lprintf(5, "Content length: %d\n", ContentLength);
 789                 content = malloc(ContentLength + 1);
 790                 memset(content, 0, ContentLength+1);
 791                 BytesRead = 0;
 792
 793                 while (BytesRead < ContentLength) {
 794                         a=read(WC->http_sock, &content[BytesRead],
 795                                 ContentLength - BytesRead);
 796                         if (a <= 0) BytesRead = ContentLength;
 797                         else BytesRead += a;
 798                 }
 799
 800                 if (!strncasecmp(ContentType,
 801                               "application/x-www-form-urlencoded", 33)) {
 802                         addurls(content);
 803                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 804                         content_end = content + ContentLength;
 805                         mime_parser(content, content_end, *upload_handler,
 806                                         NULL, NULL, NULL, 0);
 807                 }
 808         } else {
 809                 content = NULL;
 810         }
 811
 812         /* If there are variables in the URL, we must grab them now */
 813         for (a = 0; a < strlen(cmd); ++a)
 814                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 815                         for (b = a; b < strlen(cmd); ++b)
 816                                 if (isspace(cmd[b]))
 817                                         cmd[b] = 0;
 818                         addurls(&cmd[a + 1]);
 819                         cmd[a] = 0;
 820                 }
 821         /*
 822          * If we're not connected to a Citadel server, try to hook up the
 823          * connection now.  Preference is given to the host and port specified
 824          * by browser cookies, if cookies have been supplied.
 825          */
 826         if (!WC->connected) {
 827                 if (strlen(bstr("host")) > 0)
 828                         strcpy(c_host, bstr("host"));
 829                 if (strlen(bstr("port")) > 0)
 830                         strcpy(c_port, bstr("port"));
 831
 832                 if (!strcasecmp(c_host, "uds")) {
 833                         /* unix domain socket */
 834                         sprintf(buf, "%s/citadel.socket", c_port);
 835                         WC->serv_sock = uds_connectsock(buf);
 836                 }
 837                 else {
 838                         /* tcp socket */
 839                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 840                 }
 841
 842                 if (WC->serv_sock < 0) {
 843                         do_logout();
 844                         goto SKIP_ALL_THIS_CRAP;
 845                 }
 846                 else {
 847                         WC->connected = 1;
 848                         serv_gets(buf); /* get the server welcome message */
 849                         locate_host(browser_host, WC->http_sock);
 850                         get_serv_info(browser_host, user_agent);
 851                 }
 852         }
 853
 854         check_for_express_messages();
 855
 856         /*
 857          * If we're not logged in, but we have username and password cookies
 858          * supplied by the browser, try using them to log in.
 859          */
 860         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 861                 serv_printf("USER %s", c_username);
 862                 serv_gets(buf);
 863                 if (buf[0] == '3') {
 864                         serv_printf("PASS %s", c_password);
 865                         serv_gets(buf);
 866                         if (buf[0] == '2') {
 867                                 become_logged_in(c_username, c_password, buf);
 868                         }
 869                 }
 870         }
 871         /*
 872          * If we don't have a current room, but a cookie specifying the
 873          * current room is supplied, make an effort to go there.
 874          */
 875         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 876                 serv_printf("GOTO %s", c_roomname);
 877                 serv_gets(buf);
 878                 if (buf[0] == '2') {
 879                         strcpy(WC->wc_roomname, c_roomname);
 880                 }
 881         }
 882         if (!strcasecmp(action, "static")) {
 883                 strcpy(buf, &cmd[12]);
 884                 for (a = 0; a < strlen(buf); ++a)
 885                         if (isspace(buf[a]))
 886                                 buf[a] = 0;
 887                 output_static(buf);
 888         } else if (!strcasecmp(action, "image")) {
 889                 output_image();
 890         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 891                 do_login();
 892         } else if (!WC->logged_in) {
 893                 display_login(NULL);
 894         }
 895         /* Various commands... */
 896
 897         else if (!strcasecmp(action, "do_welcome")) {
 898                 do_welcome();
 899         } else if (!strcasecmp(action, "blank")) {
 900                 blank_page();
 901         } else if (!strcasecmp(action, "display_main_menu")) {
 902                 display_main_menu();
 903         } else if (!strcasecmp(action, "whobbs")) {
 904                 whobbs();
 905         } else if (!strcasecmp(action, "knrooms")) {
 906                 knrooms();
 907         } else if (!strcasecmp(action, "gotonext")) {
 908                 slrp_highest();
 909                 gotonext();
 910         } else if (!strcasecmp(action, "skip")) {
 911                 gotonext();
 912         } else if (!strcasecmp(action, "ungoto")) {
 913                 ungoto();
 914         } else if (!strcasecmp(action, "dotgoto")) {
 915                 slrp_highest();
 916                 smart_goto(bstr("room"));
 917         } else if (!strcasecmp(action, "dotskip")) {
 918                 smart_goto(bstr("room"));
 919         } else if (!strcasecmp(action, "termquit")) {
 920                 do_logout();
 921         } else if (!strcasecmp(action, "readnew")) {
 922                 readloop("readnew");
 923         } else if (!strcasecmp(action, "readold")) {
 924                 readloop("readold");
 925         } else if (!strcasecmp(action, "readfwd")) {
 926                 readloop("readfwd");
 927         } else if (!strcasecmp(action, "headers")) {
 928                 readloop("headers");
 929         } else if (!strcasecmp(action, "display_enter")) {
 930                 display_enter();
 931         } else if (!strcasecmp(action, "post")) {
 932                 post_message();
 933         } else if (!strcasecmp(action, "delete_msg")) {
 934                 delete_msg();
 935         } else if (!strcasecmp(action, "confirm_move_msg")) {
 936                 confirm_move_msg();
 937         } else if (!strcasecmp(action, "move_msg")) {
 938                 move_msg();
 939         } else if (!strcasecmp(action, "userlist")) {
 940                 userlist();
 941         } else if (!strcasecmp(action, "showuser")) {
 942                 showuser();
 943         } else if (!strcasecmp(action, "display_page")) {
 944                 display_page();
 945         } else if (!strcasecmp(action, "page_user")) {
 946                 page_user();
 947         } else if (!strcasecmp(action, "chat")) {
 948                 do_chat();
 949         } else if (!strcasecmp(action, "display_private")) {
 950                 display_private("", 0);
 951         } else if (!strcasecmp(action, "goto_private")) {
 952                 goto_private();
 953         } else if (!strcasecmp(action, "zapped_list")) {
 954                 zapped_list();
 955         } else if (!strcasecmp(action, "display_zap")) {
 956                 display_zap();
 957         } else if (!strcasecmp(action, "zap")) {
 958                 zap();
 959         } else if (!strcasecmp(action, "display_entroom")) {
 960                 display_entroom();
 961         } else if (!strcasecmp(action, "entroom")) {
 962                 entroom();
 963         } else if (!strcasecmp(action, "display_editroom")) {
 964                 display_editroom();
 965         } else if (!strcasecmp(action, "netedit")) {
 966                 netedit();
 967         } else if (!strcasecmp(action, "editroom")) {
 968                 editroom();
 969         } else if (!strcasecmp(action, "display_whok")) {
 970                 display_whok();
 971         } else if (!strcasecmp(action, "display_editinfo")) {
 972                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 973         } else if (!strcasecmp(action, "editinfo")) {
 974                 save_edit("Room info", "EINF 1", 1);
 975         } else if (!strcasecmp(action, "display_editbio")) {
 976                 sprintf(buf, "RBIO %s", WC->wc_username);
 977                 display_edit("Your bio", "NOOP", buf, "editbio");
 978         } else if (!strcasecmp(action, "editbio")) {
 979                 save_edit("Your bio", "EBIO", 0);
 980         } else if (!strcasecmp(action, "confirm_delete_room")) {
 981                 confirm_delete_room();
 982         } else if (!strcasecmp(action, "delete_room")) {
 983                 delete_room();
 984         } else if (!strcasecmp(action, "validate")) {
 985                 validate();
 986         } else if (!strcasecmp(action, "display_editpic")) {
 987                 display_graphics_upload("your photo",
 988                                         "UIMG 0|_userpic_",
 989                                         "/editpic");
 990         } else if (!strcasecmp(action, "editpic")) {
 991                 do_graphics_upload("UIMG 1|_userpic_");
 992         } else if (!strcasecmp(action, "display_editroompic")) {
 993                 display_graphics_upload("the graphic for this room",
 994                                         "UIMG 0|_roompic_",
 995                                         "/editroompic");
 996         } else if (!strcasecmp(action, "editroompic")) {
 997                 do_graphics_upload("UIMG 1|_roompic_");
 998         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 999                 select_floor_to_edit_pic();
1000         } else if (!strcasecmp(action, "display_editfloorpic")) {
1001                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1002                         bstr("which_floor"));
1003                 display_graphics_upload("the graphic for this floor",
1004                                         buf,
1005                                         "/editfloorpic");
1006         } else if (!strcasecmp(action, "editfloorpic")) {
1007                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1008                         bstr("which_floor"));
1009                 do_graphics_upload(buf);
1010         } else if (!strcasecmp(action, "display_reg")) {
1011                 display_reg(0);
1012         } else if (!strcasecmp(action, "register")) {
1013                 register_user();
1014         } else if (!strcasecmp(action, "display_changepw")) {
1015                 display_changepw();
1016         } else if (!strcasecmp(action, "changepw")) {
1017                 changepw();
1018         } else if (!strcasecmp(action, "display_edit_node")) {
1019                 display_edit_node();
1020         } else if (!strcasecmp(action, "edit_node")) {
1021                 edit_node();
1022         } else if (!strcasecmp(action, "display_netconf")) {
1023                 display_netconf();
1024         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1025                 display_confirm_delete_node();
1026         } else if (!strcasecmp(action, "delete_node")) {
1027                 delete_node();
1028         } else if (!strcasecmp(action, "display_add_node")) {
1029                 display_add_node();
1030         } else if (!strcasecmp(action, "add_node")) {
1031                 add_node();
1032         } else if (!strcasecmp(action, "terminate_session")) {
1033                 slrp_highest();
1034                 terminate_session();
1035         } else if (!strcasecmp(action, "edit_me")) {
1036                 edit_me();
1037         } else if (!strcasecmp(action, "display_siteconfig")) {
1038                 display_siteconfig();
1039         } else if (!strcasecmp(action, "page_popup")) {
1040                 page_popup();
1041         } else if (!strcasecmp(action, "siteconfig")) {
1042                 siteconfig();
1043         } else if (!strcasecmp(action, "display_generic")) {
1044                 display_generic();
1045         } else if (!strcasecmp(action, "do_generic")) {
1046                 do_generic();
1047         } else if (!strcasecmp(action, "display_menubar")) {
1048                 display_menubar(1);
1049         } else if (!strcasecmp(action, "output_mimepart")) {
1050                 output_mimepart();
1051         } else if (!strcasecmp(action, "edit_vcard")) {
1052                 edit_vcard();
1053         } else if (!strcasecmp(action, "submit_vcard")) {
1054                 submit_vcard();
1055         } else if (!strcasecmp(action, "select_user_to_edit")) {
1056                 select_user_to_edit(NULL, NULL);
1057         } else if (!strcasecmp(action, "display_edituser")) {
1058                 display_edituser(NULL);
1059         } else if (!strcasecmp(action, "edituser")) {
1060                 edituser();
1061         } else if (!strcasecmp(action, "create_user")) {
1062                 create_user();
1063         } else if (!strcasecmp(action, "changeview")) {
1064                 change_view();
1065         } else if (!strcasecmp(action, "folders")) {
1066                 folders();
1067         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1068                 do_stuff_to_msgs();
1069         } else if (!strcasecmp(action, "diagnostics")) {
1070                 output_headers(1);
1071
1072                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1073                 wprintf("Command: <BR><PRE>\n");
1074                 escputs(cmd);
1075                 wprintf("</PRE><HR>\n");
1076                 wprintf("Variables: <BR><PRE>\n");
1077                 dump_vars();
1078                 wprintf("</PRE><HR>\n");
1079                 wDumpContent(1);
1080         }
1081         /* When all else fais, display the main menu. */
1082         else {
1083                 display_main_menu();
1084         }
1085
1086 SKIP_ALL_THIS_CRAP:
1087         fflush(stdout);
1088         if (content != NULL) {
1089                 free(content);
1090                 content = NULL;
1091         }
1092         free_urls();
1093         if (WC->upload_length > 0) {
1094                 free(WC->upload);
1095                 WC->upload_length = 0;
1096         }
1097 }