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 #ifdef WITH_ZLIB
 156
 157 ssize_t http_write(int fd, const void *buf, size_t count) {
 158
 159         if (WC->gzfd) {
 160                 return gzwrite(WC->gzfd, buf, count);
 161         }
 162         else {
 163                 return write(fd, buf, count);
 164         }
 165
 166
 167 }
 168
 169 #else
 170
 171 ssize_t http_write(int fd, const void *buf, size_t count) {
 172         return write(fd, buf, count);
 173 }
 174
 175 #endif
 176
 177
 178
 179
 180 void wprintf(const char *format,...)
 181 {
 182         va_list arg_ptr;
 183         char wbuf[1024];
 184
 185         va_start(arg_ptr, format);
 186         vsprintf(wbuf, format, arg_ptr);
 187         va_end(arg_ptr);
 188
 189         http_write(WC->http_sock, wbuf, strlen(wbuf));
 190 }
 191
 192
 193 /*
 194  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 195  *
 196  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 197  * append the main menu and closing tags, or 2 to
 198  * append the closing tags only.
 199  */
 200 void wDumpContent(int print_standard_html_footer)
 201 {
 202         if (WC->fake_frames) {
 203                 wprintf("</TABLE>\n");
 204                 WC->fake_frames = 0;
 205         }
 206
 207         if (print_standard_html_footer) {
 208                 if (print_standard_html_footer != 2) {
 209                         wprintf("<BR>");
 210                 }
 211                 wprintf("</BODY></HTML>\n");
 212         }
 213
 214
 215 }
 216
 217
 218 /*
 219  * Copy a string, escaping characters which have meaning in HTML.  If
 220  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 221  */
 222 void stresc(char *target, char *strbuf, int nbsp)
 223 {
 224         int a;
 225         strcpy(target, "");
 226
 227         for (a = 0; a < strlen(strbuf); ++a) {
 228                 if (strbuf[a] == '<')
 229                         strcat(target, "&lt;");
 230                 else if (strbuf[a] == '>')
 231                         strcat(target, "&gt;");
 232                 else if (strbuf[a] == '&')
 233                         strcat(target, "&amp;");
 234                 else if (strbuf[a] == '\"')
 235                         strcat(target, "&quot;");
 236                 else if (strbuf[a] == '\'')
 237                         strcat(target, "&#39;");
 238                 else if (strbuf[a] == LB)
 239                         strcat(target, "<");
 240                 else if (strbuf[a] == RB)
 241                         strcat(target, ">");
 242                 else if (strbuf[a] == QU)
 243                         strcat(target, "\"");
 244                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 245                         strcat(target, "&nbsp;");
 246                 } else {
 247                         strncat(target, &strbuf[a], 1);
 248                 }
 249         }
 250 }
 251
 252 void escputs1(char *strbuf, int nbsp)
 253 {
 254         char buf[1024];
 255         stresc(buf, strbuf, nbsp);
 256         wprintf("%s", buf);
 257 }
 258
 259 void escputs(char *strbuf)
 260 {
 261         escputs1(strbuf, 0);
 262 }
 263
 264 /*
 265  * Escape a string for feeding out as a URL.
 266  * Returns a pointer to a buffer that must be freed by the caller!
 267  */
 268 void urlesc(char *outbuf, char *strbuf)
 269 {
 270         int a, b, c;
 271         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 272
 273         strcpy(outbuf, "");
 274
 275         for (a = 0; a < strlen(strbuf); ++a) {
 276                 c = 0;
 277                 for (b = 0; b < strlen(ec); ++b) {
 278                         if (strbuf[a] == ec[b])
 279                                 c = 1;
 280                 }
 281                 b = strlen(outbuf);
 282                 if (c == 1)
 283                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 284                 else
 285                         sprintf(&outbuf[b], "%c", strbuf[a]);
 286         }
 287 }
 288
 289 void urlescputs(char *strbuf)
 290 {
 291         char outbuf[SIZ];
 292
 293         urlesc(outbuf, strbuf);
 294         wprintf("%s", outbuf);
 295 }
 296
 297
 298
 299
 300 /*
 301  * Output all that important stuff that the browser will want to see
 302  *
 303  * control codes:
 304  *
 305  * Bits 0 and 1:
 306  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 307  * 1 = HTTP headers plus the room banner
 308  * 2 = HTTP headers required to terminate the session (unset cookies)
 309  * 3 = HTTP and HTML headers, but no room banner
 310  *
 311  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 312  *
 313  * Bit 3: suppress check for express messages
 314  */
 315 void output_headers(int controlcode)
 316 {
 317         char cookie[SIZ];
 318         int print_standard_html_head = 0;
 319         int refresh30 = 0;
 320         int suppress_check = 0;
 321         char httpnow[SIZ];
 322         static int pageseq = 0;
 323 #ifdef WITH_ZLIB
 324         gzFile temp_gzfd = NULL;
 325 #endif
 326
 327         print_standard_html_head        =       controlcode & 0x03;
 328         refresh30                       =       ((controlcode & 0x04) >> 2);
 329         suppress_check                  =       ((controlcode & 0x08) >> 3);
 330
 331         wprintf("HTTP/1.0 200 OK\n");
 332
 333         httpdate(httpnow, time(NULL));
 334
 335 #ifdef WITH_ZLIB
 336         if (WC->gzcompressed) {
 337                 temp_gzfd = gzdopen(WC->http_sock, "wb9");
 338         }
 339 #endif
 340
 341         if (print_standard_html_head > 0) {
 342                 wprintf("Content-type: text/html\n");
 343                 wprintf("Server: %s\n", SERVER);
 344                 wprintf("Connection: close\n");
 345                 wprintf("Pragma: no-cache\n");
 346                 wprintf("Cache-Control: no-store\n");
 347 #ifdef WITH_ZLIB
 348                 if (temp_gzfd != NULL) {
 349                         wprintf("Content-Encoding: gzip\n");
 350                 }
 351 #endif
 352         }
 353         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 354                         WC->wc_password, WC->wc_roomname);
 355         if (print_standard_html_head == 2) {
 356                 wprintf("Set-cookie: webcit=%s\n", unset);
 357         } else {
 358                 wprintf("Set-cookie: webcit=%s\n", cookie);
 359                 if (server_cookie != NULL) {
 360                         wprintf("%s\n", server_cookie);
 361                 }
 362         }
 363
 364         if (print_standard_html_head > 0) {
 365                 wprintf("\n");
 366
 367 #ifdef WITH_ZLIB
 368                 if (temp_gzfd != NULL) {
 369                         WC->gzfd = temp_gzfd;
 370                 }
 371 #endif
 372
 373                 wprintf("<HTML><HEAD><TITLE>");
 374                 escputs(serv_info.serv_humannode);
 375                 wprintf("</TITLE>\n"
 376                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 377                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 378                         "<META NAME=\"MSSmartTagsPreventParsing\" CONTENT=\"TRUE\">\n");
 379                 if (refresh30) wprintf(
 380                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 381                 else wprintf(
 382                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 383                 wprintf("</HEAD>\n");
 384
 385                 /* script for checking for pages (not always launched) */
 386                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 387                 wprintf("function launch_page_popup() {\n");
 388                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 389                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 390                         "scrollbars=yes,resizable=no,height=250,width=400');\n",
 391                         ++pageseq);
 392                 wprintf("}\n");
 393                 wprintf("</SCRIPT>\n");
 394                 /* end script */
 395
 396                 /* (JavaScript keyboard-based navigation would go here) */
 397
 398                 if (!suppress_check) if (WC->HaveExpressMessages) {
 399                         svprintf("extrabodyparms", WCS_STRING, "%s",
 400                                 "onload=\"launch_page_popup()\" ");
 401                         WC->HaveExpressMessages = 0;
 402                 }
 403                 do_template("background");
 404                 clear_local_substs();
 405
 406         if (print_standard_html_head == 1) {
 407                 wprintf("<A NAME=\"TheTop\"></A>");
 408
 409                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 410                         "<TD>\n");
 411
 412                 embed_room_banner(NULL);
 413
 414                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 415
 416                 WC->fake_frames = 1;
 417                 }
 418         }
 419 }
 420
 421
 422 /*
 423  *
 424  */
 425 void http_redirect(char *whichpage) {
 426         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 427         wprintf("Location: %s\n", whichpage);
 428         wprintf("URI: %s\n", whichpage);
 429         wprintf("Content-type: text/html\n\n");
 430         wprintf("<html><body>\n");
 431         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 432                 whichpage);
 433         wprintf("</body></html>\n");
 434 }
 435
 436
 437
 438 void check_for_express_messages()
 439 {
 440         char buf[SIZ];
 441
 442         serv_puts("NOOP");
 443         serv_gets(buf);
 444         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 445 }
 446
 447
 448
 449
 450 void output_static(char *what)
 451 {
 452         char buf[4096];
 453         FILE *fp;
 454         struct stat statbuf;
 455         off_t bytes;
 456         char *bigbuffer;
 457
 458         sprintf(buf, "static/%s", what);
 459         fp = fopen(buf, "rb");
 460         if (fp == NULL) {
 461                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 462                 wprintf("Content-Type: text/plain\n");
 463                 wprintf("\n");
 464                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 465         } else {
 466                 output_headers(0);
 467
 468                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 469                         wprintf("Content-type: image/gif\n");
 470                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 471                         wprintf("Content-type: text/plain\n");
 472                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 473                         wprintf("Content-type: text/css\n");
 474                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 475                         wprintf("Content-type: image/jpeg\n");
 476                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 477                         wprintf("Content-type: image/png\n");
 478                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 479                         wprintf("Content-type: text/html\n");
 480                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 481                         wprintf("Content-type: text/vnd.wap.wml\n");
 482                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 483                         wprintf("Content-type: text/vnd.wap.wmlscript\n");
 484                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 485                         wprintf("Content-type: application/vnd.wap.wmlc\n");
 486                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 487                         wprintf("Content-type: application/vnd.wap.wmlscriptc\n");
 488                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 489                         wprintf("Content-type: image/vnd.wap.wbmp\n");
 490                 else
 491                         wprintf("Content-type: application/octet-stream\n");
 492
 493                 fstat(fileno(fp), &statbuf);
 494                 bytes = statbuf.st_size;
 495                 lprintf(3, "Static: %s, %ld bytes\n", what, bytes);
 496                 wprintf("Content-length: %ld\n", (long) bytes);
 497                 wprintf("\n");
 498                 bigbuffer = malloc(bytes);
 499                 fread(bigbuffer, bytes, 1, fp);
 500                 fclose(fp);
 501                 http_write(WC->http_sock, bigbuffer, bytes);
 502                 free(bigbuffer);
 503         }
 504         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 505                 end_webcit_session();
 506         }
 507 }
 508
 509
 510 /*
 511  * When the browser requests an image file from the Citadel server,
 512  * this function is called to transmit it.
 513  */
 514 void output_image()
 515 {
 516         char buf[SIZ];
 517         char *xferbuf = NULL;
 518         off_t bytes;
 519         off_t thisblock;
 520         off_t accomplished = 0L;
 521
 522         lprintf(5, "output_image() called\n");
 523         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 524         serv_gets(buf);
 525         if (buf[0] == '2') {
 526                 bytes = extract_long(&buf[4], 0);
 527                 xferbuf = malloc(bytes);
 528
 529                 /* Read it from the server */
 530                 while (bytes > (off_t) 0) {
 531                         thisblock = (off_t) sizeof(xferbuf);
 532                         if (thisblock > bytes) {
 533                                 thisblock = bytes;
 534                         }
 535                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 536                         serv_gets(buf);
 537                         if (buf[0] == '6') {
 538                                 thisblock = extract_long(&buf[4], 0);
 539                                 serv_read(&xferbuf[accomplished],
 540                                         (int) thisblock);
 541                         }
 542                         else {
 543                                 memset(&xferbuf[accomplished], 0, thisblock);
 544                         }
 545                         bytes = bytes - thisblock;
 546                         accomplished += thisblock;
 547                 }
 548                 serv_puts("CLOS");
 549                 serv_gets(buf);
 550
 551                 /* Now write it to the browser */
 552                 output_headers(0);
 553                 wprintf("Content-type: image/gif\n");
 554                 wprintf("Content-length: %ld\n", (long) accomplished);
 555                 wprintf("\n");
 556                 http_write(WC->http_sock, xferbuf, accomplished);
 557
 558         } else {
 559                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 560                 output_headers(0);
 561                 wprintf("Content-Type: text/plain\n");
 562                 wprintf("\n");
 563                 wprintf("Error retrieving image: %s\n", &buf[4]);
 564         }
 565
 566         if (xferbuf) {
 567                 free(xferbuf);
 568         }
 569
 570 }
 571
 572 /*
 573  */
 574 void output_mimepart()
 575 {
 576         char buf[SIZ];
 577         char xferbuf[4096];
 578         off_t bytes;
 579         off_t thisblock;
 580         off_t accomplished = 0L;
 581         char content_type[SIZ];
 582
 583         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 584         serv_gets(buf);
 585         if (buf[0] == '2') {
 586                 bytes = extract_long(&buf[4], 0);
 587                 extract(content_type, &buf[4], 3);
 588                 output_headers(0);
 589                 wprintf("Content-type: %s\n", content_type);
 590                 wprintf("Content-length: %ld\n", (long) bytes);
 591                 wprintf("\n");
 592
 593                 while (bytes > (off_t) 0) {
 594                         thisblock = (off_t) sizeof(xferbuf);
 595                         if (thisblock > bytes) {
 596                                 thisblock = bytes;
 597                         }
 598                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 599                         serv_gets(buf);
 600                         if (buf[0] == '6') {
 601                                 thisblock = extract_long(&buf[4], 0);
 602                                 serv_read(xferbuf, (int) thisblock);
 603                         }
 604                         else {
 605                                 memset(xferbuf, 0, thisblock);
 606                         }
 607                         http_write(WC->http_sock, xferbuf, thisblock);
 608                         bytes = bytes - thisblock;
 609                         accomplished = accomplished + thisblock;
 610                 }
 611                 serv_puts("CLOS");
 612                 serv_gets(buf);
 613         } else {
 614                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 615                 output_headers(0);
 616                 wprintf("Content-Type: text/plain\n");
 617                 wprintf("\n");
 618                 wprintf("Error retrieving part: %s\n", &buf[4]);
 619         }
 620
 621 }
 622
 623
 624 /*
 625  */
 626 char *load_mimepart(long msgnum, char *partnum)
 627 {
 628         char buf[SIZ];
 629         off_t bytes;
 630         off_t thisblock;
 631         off_t accomplished = 0L;
 632         char content_type[SIZ];
 633         char *content;
 634
 635         serv_printf("OPNA %ld|%s", msgnum, partnum);
 636         serv_gets(buf);
 637         if (buf[0] == '2') {
 638                 bytes = extract_long(&buf[4], 0);
 639                 extract(content_type, &buf[4], 3);
 640
 641                 content = malloc(bytes + 1);
 642
 643                 while (bytes > (off_t) 0) {
 644                         thisblock = bytes;
 645                         if (thisblock > 4096L) {
 646                                 thisblock = 4096L;
 647                         }
 648                         if (thisblock > bytes) {
 649                                 thisblock = bytes;
 650                         }
 651                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 652                         serv_gets(buf);
 653                         if (buf[0] == '6') {
 654                                 thisblock = extract_long(&buf[4], 0);
 655                                 serv_read(&content[accomplished], (int) thisblock);
 656                         }
 657                         else {
 658                                 memset(&content[accomplished], 0, thisblock);
 659                         }
 660                         bytes = bytes - thisblock;
 661                         accomplished = accomplished + thisblock;
 662                 }
 663                 serv_puts("CLOS");
 664                 serv_gets(buf);
 665                 content[accomplished] = 0;      /* null terminate for good measure */
 666                 return(content);
 667         }
 668         else {
 669                 return(NULL);
 670         }
 671
 672 }
 673
 674
 675 /*
 676  * Convenience functions to display a page containing only a string
 677  */
 678 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 679 {
 680         wprintf("HTTP/1.0 200 OK\n");
 681         output_headers(1);
 682         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 683         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 684         wprintf("<B>%s</B>\n", titlebarmsg);
 685         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 686         escputs(messagetext);
 687
 688         wprintf("<HR>\n");
 689         wDumpContent(1);
 690 }
 691
 692
 693 /*
 694  * Display a blank page.
 695  */
 696 void blank_page(void) {
 697         output_headers(7);
 698         wDumpContent(2);
 699 }
 700
 701
 702
 703
 704 /*
 705  * Offer to make any page the user's "start page."
 706  */
 707 void offer_start_page(void) {
 708         wprintf("<A HREF=\"/change_start_page?startpage=");
 709         urlescputs(WC->this_page);
 710         wprintf("\">"
 711                 "<FONT SIZE=-2 COLOR=#AAAAAA>Make this my start page</FONT>"
 712                 "</A>"
 713         );
 714 }
 715
 716
 717 /*
 718  * Change the user's start page
 719  */
 720 void change_start_page(void) {
 721
 722         if (bstr("startpage") == NULL) {
 723                 display_error("startpage set to null");
 724                 return;
 725         }
 726
 727         set_preference("startpage", bstr("startpage"));
 728
 729         output_headers(3);
 730         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=000077><TR><TD>");
 731         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 732         wprintf("<B>New start page</B>\n");
 733         wprintf("</FONT></TD></TR></TABLE>\n");
 734
 735         wprintf("<CENTER>"
 736                 "<font size=+2>Your start page has been changed.</font>"
 737                 "<BR><BR>\n"
 738                 "<I>(Note: this does not change your browser's home page. "
 739                 "It changes the page you begin on when you log on to ");
 740         escputs(serv_info.serv_humannode);
 741         wprintf(".)</I><BR><BR>"
 742                 "<a href = \"javascript:history.back()\">Back...</a>"
 743                 "</CENTER>");
 744
 745         wDumpContent(1);
 746 }
 747
 748
 749
 750
 751 void display_error(char *errormessage)
 752 {
 753         convenience_page("770000", "Error", errormessage);
 754 }
 755
 756 void display_success(char *successmessage)
 757 {
 758         convenience_page("007700", "OK", successmessage);
 759 }
 760
 761
 762
 763 void extract_action(char *actbuf, char *cmdbuf)
 764 {
 765         int i;
 766
 767         strcpy(actbuf, cmdbuf);
 768         if (!strncasecmp(actbuf, "GET /", 5))
 769                 strcpy(actbuf, &actbuf[5]);
 770         if (!strncasecmp(actbuf, "PUT /", 5))
 771                 strcpy(actbuf, &actbuf[5]);
 772         if (!strncasecmp(actbuf, "POST /", 6))
 773                 strcpy(actbuf, &actbuf[6]);
 774
 775         for (i = 0; i < strlen(actbuf); ++i) {
 776                 if (actbuf[i] == ' ') {
 777                         actbuf[i] = 0;
 778                         i = 0;
 779                 }
 780                 if (actbuf[i] == '/') {
 781                         actbuf[i] = 0;
 782                         i = 0;
 783                 }
 784                 if (actbuf[i] == '?') {
 785                         actbuf[i] = 0;
 786                         i = 0;
 787                 }
 788                 if (actbuf[i] == '&') {
 789                         actbuf[i] = 0;
 790                         i = 0;
 791                 }
 792         }
 793 }
 794
 795
 796 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 797                         void *content, char *cbtype, size_t length,
 798                         char *encoding, void *userdata)
 799 {
 800
 801         lprintf(5, "UPLOAD HANDLER CALLED\n");
 802         lprintf(5, "    name = %s\n", name);
 803         lprintf(5, "filename = %s\n", filename);
 804         lprintf(5, "encoding = %s\n", encoding);
 805         lprintf(5, "    type = %s\n", cbtype);
 806         lprintf(5, "  length = %ld\n", (long)length);
 807
 808         if (length > 0) {
 809                 WC->upload = malloc(length);
 810                 if (WC->upload != NULL) {
 811                         WC->upload_length = length;
 812                         memcpy(WC->upload, content, length);
 813                 }
 814                 else {
 815                         lprintf(9, "malloc() failed: %s\n",
 816                                 strerror(errno));
 817                 }
 818         }
 819 }
 820
 821
 822
 823
 824 /*
 825  * Entry point for WebCit transaction
 826  */
 827 void session_loop(struct httprequest *req, int gzip)
 828 {
 829         char cmd[SIZ];
 830         char action[SIZ];
 831         char buf[SIZ];
 832         int a, b;
 833         int ContentLength = 0;
 834         int BytesRead;
 835         char ContentType[512];
 836         char *content;
 837         char *content_end;
 838         struct httprequest *hptr;
 839         char browser_host[SIZ];
 840         char user_agent[SIZ];
 841
 842         /* We stuff these with the values coming from the client cookies,
 843          * so we can use them to reconnect a timed out session if we have to.
 844          */
 845         char c_host[SIZ];
 846         char c_port[SIZ];
 847         char c_username[SIZ];
 848         char c_password[SIZ];
 849         char c_roomname[SIZ];
 850         char cookie[SIZ];
 851
 852         strcpy(c_host, defaulthost);
 853         strcpy(c_port, defaultport);
 854         strcpy(c_username, "");
 855         strcpy(c_password, "");
 856         strcpy(c_roomname, "");
 857
 858         WC->upload_length = 0;
 859         WC->upload = NULL;
 860
 861         WC->is_wap = 0;
 862
 863         if (gzip) {
 864                 WC->gzcompressed = 1;
 865         }
 866         else {
 867                 WC->gzcompressed = 0;
 868         }
 869
 870         hptr = req;
 871         if (hptr == NULL) return;
 872
 873         strcpy(cmd, hptr->line);
 874         hptr = hptr->next;
 875         extract_action(action, cmd);
 876
 877         while (hptr != NULL) {
 878                 strcpy(buf, hptr->line);
 879                 hptr = hptr->next;
 880
 881                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 882                         strcpy(cookie, &buf[15]);
 883                         cookie_to_stuff(cookie, NULL,
 884                                       c_username, c_password, c_roomname);
 885                 }
 886                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 887                         ContentLength = atoi(&buf[16]);
 888                 }
 889                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 890                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 891                 }
 892                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 893                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 894                 }
 895                 else if (!strncasecmp(buf, "Host: ", 6)) {
 896                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 897                 }
 898                 /* Only WAP gateways explicitly name this content-type */
 899                 else if (strstr(buf, "text/vnd.wap.wml")) {
 900                         WC->is_wap = 1;
 901                 }
 902         }
 903
 904         if (ContentLength > 0) {
 905                 lprintf(5, "Content length: %d\n", ContentLength);
 906                 content = malloc(ContentLength + 1);
 907                 memset(content, 0, ContentLength+1);
 908                 BytesRead = 0;
 909
 910                 while (BytesRead < ContentLength) {
 911                         a=read(WC->http_sock, &content[BytesRead],
 912                                 ContentLength - BytesRead);
 913                         if (a <= 0) BytesRead = ContentLength;
 914                         else BytesRead += a;
 915                 }
 916
 917                 if (!strncasecmp(ContentType,
 918                               "application/x-www-form-urlencoded", 33)) {
 919                         addurls(content);
 920                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 921                         content_end = content + ContentLength;
 922                         mime_parser(content, content_end, *upload_handler,
 923                                         NULL, NULL, NULL, 0);
 924                 }
 925         } else {
 926                 content = NULL;
 927         }
 928
 929         /* make a note of where we are in case the user wants to save it */
 930         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 931         remove_token(WC->this_page, 2, ' ');
 932         remove_token(WC->this_page, 0, ' ');
 933
 934         /* If there are variables in the URL, we must grab them now */
 935         for (a = 0; a < strlen(cmd); ++a) {
 936                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 937                         for (b = a; b < strlen(cmd); ++b)
 938                                 if (isspace(cmd[b]))
 939                                         cmd[b] = 0;
 940                         addurls(&cmd[a + 1]);
 941                         cmd[a] = 0;
 942                 }
 943         }
 944
 945         /*
 946          * If we're not connected to a Citadel server, try to hook up the
 947          * connection now.  Preference is given to the host and port specified
 948          * by browser cookies, if cookies have been supplied.
 949          */
 950         if (!WC->connected) {
 951                 if (strlen(bstr("host")) > 0)
 952                         strcpy(c_host, bstr("host"));
 953                 if (strlen(bstr("port")) > 0)
 954                         strcpy(c_port, bstr("port"));
 955
 956                 if (!strcasecmp(c_host, "uds")) {
 957                         /* unix domain socket */
 958                         sprintf(buf, "%s/citadel.socket", c_port);
 959                         WC->serv_sock = uds_connectsock(buf);
 960                 }
 961                 else {
 962                         /* tcp socket */
 963                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 964                 }
 965
 966                 if (WC->serv_sock < 0) {
 967                         do_logout();
 968                         goto SKIP_ALL_THIS_CRAP;
 969                 }
 970                 else {
 971                         WC->connected = 1;
 972                         serv_gets(buf); /* get the server welcome message */
 973                         locate_host(browser_host, WC->http_sock);
 974                         get_serv_info(browser_host, user_agent);
 975                 }
 976         }
 977
 978         /*
 979          * Functions which can be performed without logging in
 980          */
 981         if (!strcasecmp(action, "listsub")) {
 982                 do_listsub();
 983                 goto SKIP_ALL_THIS_CRAP;
 984         }
 985
 986         check_for_express_messages();
 987
 988         /*
 989          * If we're not logged in, but we have username and password cookies
 990          * supplied by the browser, try using them to log in.
 991          */
 992         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 993                 serv_printf("USER %s", c_username);
 994                 serv_gets(buf);
 995                 if (buf[0] == '3') {
 996                         serv_printf("PASS %s", c_password);
 997                         serv_gets(buf);
 998                         if (buf[0] == '2') {
 999                                 become_logged_in(c_username, c_password, buf);
1000                         }
1001                 }
1002         }
1003         /*
1004          * If we don't have a current room, but a cookie specifying the
1005          * current room is supplied, make an effort to go there.
1006          */
1007         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
1008                 serv_printf("GOTO %s", c_roomname);
1009                 serv_gets(buf);
1010                 if (buf[0] == '2') {
1011                         strcpy(WC->wc_roomname, c_roomname);
1012                 }
1013         }
1014         if (!strcasecmp(action, "static")) {
1015                 strcpy(buf, &cmd[12]);
1016                 for (a = 0; a < strlen(buf); ++a)
1017                         if (isspace(buf[a]))
1018                                 buf[a] = 0;
1019                 output_static(buf);
1020         } else if (!strcasecmp(action, "image")) {
1021                 output_image();
1022
1023         /*
1024          * All functions handled below this point ... make sure we log in
1025          * before doing anything else!
1026          */
1027         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1028                 do_login();
1029         } else if (!WC->logged_in) {
1030                 display_login(NULL);
1031         }
1032
1033         /*
1034          * Various commands...
1035          */
1036
1037         else if (!strcasecmp(action, "do_welcome")) {
1038                 do_welcome();
1039         } else if (!strcasecmp(action, "blank")) {
1040                 blank_page();
1041         } else if (!strcasecmp(action, "display_main_menu")) {
1042                 display_main_menu();
1043         } else if (!strcasecmp(action, "whobbs")) {
1044                 whobbs();
1045         } else if (!strcasecmp(action, "knrooms")) {
1046                 knrooms();
1047         } else if (!strcasecmp(action, "gotonext")) {
1048                 slrp_highest();
1049                 gotonext();
1050         } else if (!strcasecmp(action, "skip")) {
1051                 gotonext();
1052         } else if (!strcasecmp(action, "ungoto")) {
1053                 ungoto();
1054         } else if (!strcasecmp(action, "dotgoto")) {
1055                 slrp_highest();
1056                 smart_goto(bstr("room"));
1057         } else if (!strcasecmp(action, "dotskip")) {
1058                 smart_goto(bstr("room"));
1059         } else if (!strcasecmp(action, "termquit")) {
1060                 do_logout();
1061         } else if (!strcasecmp(action, "readnew")) {
1062                 readloop("readnew");
1063         } else if (!strcasecmp(action, "readold")) {
1064                 readloop("readold");
1065         } else if (!strcasecmp(action, "readfwd")) {
1066                 readloop("readfwd");
1067         } else if (!strcasecmp(action, "headers")) {
1068                 readloop("headers");
1069         } else if (!strcasecmp(action, "display_enter")) {
1070                 display_enter();
1071         } else if (!strcasecmp(action, "post")) {
1072                 post_message();
1073         } else if (!strcasecmp(action, "delete_msg")) {
1074                 delete_msg();
1075         } else if (!strcasecmp(action, "confirm_move_msg")) {
1076                 confirm_move_msg();
1077         } else if (!strcasecmp(action, "move_msg")) {
1078                 move_msg();
1079         } else if (!strcasecmp(action, "userlist")) {
1080                 userlist();
1081         } else if (!strcasecmp(action, "showuser")) {
1082                 showuser();
1083         } else if (!strcasecmp(action, "display_page")) {
1084                 display_page();
1085         } else if (!strcasecmp(action, "page_user")) {
1086                 page_user();
1087         } else if (!strcasecmp(action, "chat")) {
1088                 do_chat();
1089         } else if (!strcasecmp(action, "display_private")) {
1090                 display_private("", 0);
1091         } else if (!strcasecmp(action, "goto_private")) {
1092                 goto_private();
1093         } else if (!strcasecmp(action, "zapped_list")) {
1094                 zapped_list();
1095         } else if (!strcasecmp(action, "display_zap")) {
1096                 display_zap();
1097         } else if (!strcasecmp(action, "zap")) {
1098                 zap();
1099         } else if (!strcasecmp(action, "display_entroom")) {
1100                 display_entroom();
1101         } else if (!strcasecmp(action, "entroom")) {
1102                 entroom();
1103         } else if (!strcasecmp(action, "display_editroom")) {
1104                 display_editroom();
1105         } else if (!strcasecmp(action, "netedit")) {
1106                 netedit();
1107         } else if (!strcasecmp(action, "editroom")) {
1108                 editroom();
1109         } else if (!strcasecmp(action, "display_whok")) {
1110                 display_whok();
1111         } else if (!strcasecmp(action, "display_editinfo")) {
1112                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
1113         } else if (!strcasecmp(action, "editinfo")) {
1114                 save_edit("Room info", "EINF 1", 1);
1115         } else if (!strcasecmp(action, "display_editbio")) {
1116                 sprintf(buf, "RBIO %s", WC->wc_username);
1117                 display_edit("Your bio", "NOOP", buf, "editbio");
1118         } else if (!strcasecmp(action, "editbio")) {
1119                 save_edit("Your bio", "EBIO", 0);
1120         } else if (!strcasecmp(action, "confirm_delete_room")) {
1121                 confirm_delete_room();
1122         } else if (!strcasecmp(action, "delete_room")) {
1123                 delete_room();
1124         } else if (!strcasecmp(action, "validate")) {
1125                 validate();
1126         } else if (!strcasecmp(action, "display_editpic")) {
1127                 display_graphics_upload("your photo",
1128                                         "UIMG 0|_userpic_",
1129                                         "/editpic");
1130         } else if (!strcasecmp(action, "editpic")) {
1131                 do_graphics_upload("UIMG 1|_userpic_");
1132         } else if (!strcasecmp(action, "display_editroompic")) {
1133                 display_graphics_upload("the graphic for this room",
1134                                         "UIMG 0|_roompic_",
1135                                         "/editroompic");
1136         } else if (!strcasecmp(action, "editroompic")) {
1137                 do_graphics_upload("UIMG 1|_roompic_");
1138         } else if (!strcasecmp(action, "delete_floor")) {
1139                 delete_floor();
1140         } else if (!strcasecmp(action, "rename_floor")) {
1141                 rename_floor();
1142         } else if (!strcasecmp(action, "create_floor")) {
1143                 create_floor();
1144         } else if (!strcasecmp(action, "display_editfloorpic")) {
1145                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1146                         bstr("which_floor"));
1147                 display_graphics_upload("the graphic for this floor",
1148                                         buf,
1149                                         "/editfloorpic");
1150         } else if (!strcasecmp(action, "editfloorpic")) {
1151                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1152                         bstr("which_floor"));
1153                 do_graphics_upload(buf);
1154         } else if (!strcasecmp(action, "display_reg")) {
1155                 display_reg(0);
1156         } else if (!strcasecmp(action, "register")) {
1157                 register_user();
1158         } else if (!strcasecmp(action, "display_changepw")) {
1159                 display_changepw();
1160         } else if (!strcasecmp(action, "changepw")) {
1161                 changepw();
1162         } else if (!strcasecmp(action, "display_edit_node")) {
1163                 display_edit_node();
1164         } else if (!strcasecmp(action, "edit_node")) {
1165                 edit_node();
1166         } else if (!strcasecmp(action, "display_netconf")) {
1167                 display_netconf();
1168         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1169                 display_confirm_delete_node();
1170         } else if (!strcasecmp(action, "delete_node")) {
1171                 delete_node();
1172         } else if (!strcasecmp(action, "display_add_node")) {
1173                 display_add_node();
1174         } else if (!strcasecmp(action, "add_node")) {
1175                 add_node();
1176         } else if (!strcasecmp(action, "terminate_session")) {
1177                 slrp_highest();
1178                 terminate_session();
1179         } else if (!strcasecmp(action, "edit_me")) {
1180                 edit_me();
1181         } else if (!strcasecmp(action, "display_siteconfig")) {
1182                 display_siteconfig();
1183         } else if (!strcasecmp(action, "page_popup")) {
1184                 page_popup();
1185         } else if (!strcasecmp(action, "siteconfig")) {
1186                 siteconfig();
1187         } else if (!strcasecmp(action, "display_generic")) {
1188                 display_generic();
1189         } else if (!strcasecmp(action, "do_generic")) {
1190                 do_generic();
1191         } else if (!strcasecmp(action, "display_menubar")) {
1192                 display_menubar(1);
1193         } else if (!strcasecmp(action, "output_mimepart")) {
1194                 output_mimepart();
1195         } else if (!strcasecmp(action, "edit_vcard")) {
1196                 edit_vcard();
1197         } else if (!strcasecmp(action, "submit_vcard")) {
1198                 submit_vcard();
1199         } else if (!strcasecmp(action, "select_user_to_edit")) {
1200                 select_user_to_edit(NULL, NULL);
1201         } else if (!strcasecmp(action, "display_edituser")) {
1202                 display_edituser(NULL);
1203         } else if (!strcasecmp(action, "edituser")) {
1204                 edituser();
1205         } else if (!strcasecmp(action, "create_user")) {
1206                 create_user();
1207         } else if (!strcasecmp(action, "changeview")) {
1208                 change_view();
1209         } else if (!strcasecmp(action, "folders")) {
1210                 folders();
1211         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1212                 do_stuff_to_msgs();
1213         } else if (!strcasecmp(action, "change_start_page")) {
1214                 change_start_page();
1215         } else if (!strcasecmp(action, "display_floorconfig")) {
1216                 display_floorconfig(NULL);
1217         } else if (!strcasecmp(action, "toggle_self_service")) {
1218                 toggle_self_service();
1219         } else if (!strcasecmp(action, "summary")) {
1220                 summary();
1221         } else if (!strcasecmp(action, "diagnostics")) {
1222                 output_headers(1);
1223
1224                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1225                 wprintf("Command: <BR><PRE>\n");
1226                 escputs(cmd);
1227                 wprintf("</PRE><HR>\n");
1228                 wprintf("Variables: <BR><PRE>\n");
1229                 dump_vars();
1230                 wprintf("</PRE><HR>\n");
1231                 wDumpContent(1);
1232         }
1233         /* When all else fais, display the main menu. */
1234         else {
1235                 display_main_menu();
1236         }
1237
1238 SKIP_ALL_THIS_CRAP:
1239         fflush(stdout);
1240         if (content != NULL) {
1241                 free(content);
1242                 content = NULL;
1243         }
1244         free_urls();
1245         if (WC->upload_length > 0) {
1246                 free(WC->upload);
1247                 WC->upload_length = 0;
1248         }
1249
1250 #ifdef WITH_ZLIB
1251         if (WC->gzfd) {
1252                 gzclose(WC->gzfd);
1253                 WC->gzfd = NULL;
1254                 WC->gzcompressed = 0;
1255         }
1256 #endif
1257 }