1: #!/usr/bin/perl
2: # $Id: lonhttpd,v 1.3 2002/10/30 14:25:33 www Exp $
3:
4: $VERSION = "1.3.2 (Demonic/Linux/LON-CAPA Derivative)";
5:
6: # HTTPi Hypertext Tiny Truncated Process Implementation
7: # Copyright 1999-2001 Cameron Kaiser # All rights reserved
8: # Please read LICENSE # Do not strip this copyright message.
9: #
10: # LON-CAPA: find httpi license and readme at CVS loncom/license
11: #
12:
13: %system_content_types =
14: ("html" => "text/html",
15: "htm" => "text/html",
16: "wml" => "text/vnd.wap.wml",
17: "wbmp" => "image/vnd.wap.wbmp",
18: "wbm" => "image/vnd.wap.wbmp",
19: "xbm" => "image/x-xbitmap",
20: "pdf" => "application/pdf",
21: "fdf" => "application/vnd.fdf",
22: "bin" => "application/octet-stream",
23: "class" => "application/octet-stream",
24: "jar" => "application/octet-stream",
25: "js" => "application/x-javascript",
26: "lnk" => "application/x-hyperlink",
27: "wav" => "audio/x-wav",
28: "mp3" => "audio/x-mpeg",
29: "tif" => "image/tiff",
30: "tiff" => "image/tiff",
31: "mid" => "audio/x-midi",
32: "txt" => "text/plain",
33: "gif" => "image/gif",
34: "sit" => "application/x-stuffit",
35: "zip" => "application/x-zip-compressed",
36: "lzh" => "application/octet-stream",
37: "lha" => "application/octet-stream",
38: "gz" => "application/x-gzip",
39: "mov" => "movie/quicktime",
40: "mpeg" => "video/mpeg",
41: "mpg" => "video/mpeg",
42: "jpeg" => "image/jpeg",
43: "jpg" => "image/jpeg");
44:
45: $logfile = "/home/httpd/perl/logs/lonhttpd.log";
46:
47: # Write out PID
48:
49: $pidfile="/home/httpd/perl/logs/lonhttpd.pid";
50:
51: if (-e $pidfile) {
52: open(LFH,"$pidfile");
53: my $pide=<$LFH>;
54: chomp($pide);
55: close(LFH);
56: if (kill 0 => $pide) { die "already running"; }
57: }
58:
59: $path = "/home/httpd/html";
60: $sockaddr = 'S n a4 x8';
61:
62:
63: %content_types =
64: ("html" => "text/html",
65: "htm" => "text/html");
66: %restrictions =
67: ("/" => "#.##", # deny everything
68: "/res/adm" => ".###", # allow /res/adm
69: "/adm" => ".###", # allow /adm
70: "/status" => ".####lonadm:oeRooOvb3HtpI");
71: # See documentation for interpreting this string.
72:
73: $headers = <<"EOF";
74: Server: HTTPi/$VERSION
75: MIME-Version: 1.0
76: EOF
77:
78: %virtual_files =
79: (
80: "/adm/lonLCDfont/0.gif" => [ "image/gif", "FILE",
81: "/home/httpd/html/adm/lonLCDfont/0.gif" ] ,
82: "/adm/lonLCDfont/1.gif" => [ "image/gif", "FILE",
83: "/home/httpd/html/adm/lonLCDfont/1.gif" ] ,
84: "/adm/lonLCDfont/2.gif" => [ "image/gif", "FILE",
85: "/home/httpd/html/adm/lonLCDfont/2.gif" ] ,
86: "/adm/lonLCDfont/3.gif" => [ "image/gif", "FILE",
87: "/home/httpd/html/adm/lonLCDfont/3.gif" ] ,
88: "/adm/lonLCDfont/4.gif" => [ "image/gif", "FILE",
89: "/home/httpd/html/adm/lonLCDfont/4.gif" ] ,
90: "/adm/lonLCDfont/5.gif" => [ "image/gif", "FILE",
91: "/home/httpd/html/adm/lonLCDfont/5.gif" ] ,
92: "/adm/lonLCDfont/6.gif" => [ "image/gif", "FILE",
93: "/home/httpd/html/adm/lonLCDfont/6.gif" ] ,
94: "/adm/lonLCDfont/7.gif" => [ "image/gif", "FILE",
95: "/home/httpd/html/adm/lonLCDfont/7.gif" ] ,
96: "/adm/lonLCDfont/8.gif" => [ "image/gif", "FILE",
97: "/home/httpd/html/adm/lonLCDfont/8.gif" ] ,
98: "/adm/lonLCDfont/9.gif" => [ "image/gif", "FILE",
99: "/home/httpd/html/adm/lonLCDfont/9.gif" ] ,
100: "/adm/lonLCDfont/a.gif" => [ "image/gif", "FILE",
101: "/home/httpd/html/adm/lonLCDfont/a.gif" ] ,
102: "/adm/lonLCDfont/b.gif" => [ "image/gif", "FILE",
103: "/home/httpd/html/adm/lonLCDfont/b.gif" ] ,
104: "/adm/lonLCDfont/c.gif" => [ "image/gif", "FILE",
105: "/home/httpd/html/adm/lonLCDfont/c.gif" ] ,
106: "/adm/lonLCDfont/d.gif" => [ "image/gif", "FILE",
107: "/home/httpd/html/adm/lonLCDfont/d.gif" ] ,
108: "/adm/lonLCDfont/e.gif" => [ "image/gif", "FILE",
109: "/home/httpd/html/adm/lonLCDfont/e.gif" ] ,
110: "/adm/lonLCDfont/f.gif" => [ "image/gif", "FILE",
111: "/home/httpd/html/adm/lonLCDfont/f.gif" ] ,
112: "/adm/lonLCDfont/g.gif" => [ "image/gif", "FILE",
113: "/home/httpd/html/adm/lonLCDfont/g.gif" ] ,
114: "/adm/lonLCDfont/h.gif" => [ "image/gif", "FILE",
115: "/home/httpd/html/adm/lonLCDfont/h.gif" ] ,
116: "/adm/lonLCDfont/i.gif" => [ "image/gif", "FILE",
117: "/home/httpd/html/adm/lonLCDfont/i.gif" ] ,
118: "/adm/lonLCDfont/j.gif" => [ "image/gif", "FILE",
119: "/home/httpd/html/adm/lonLCDfont/j.gif" ] ,
120: "/adm/lonLCDfont/k.gif" => [ "image/gif", "FILE",
121: "/home/httpd/html/adm/lonLCDfont/k.gif" ] ,
122: "/adm/lonLCDfont/l.gif" => [ "image/gif", "FILE",
123: "/home/httpd/html/adm/lonLCDfont/l.gif" ] ,
124: "/adm/lonLCDfont/m.gif" => [ "image/gif", "FILE",
125: "/home/httpd/html/adm/lonLCDfont/m.gif" ] ,
126: "/adm/lonLCDfont/n.gif" => [ "image/gif", "FILE",
127: "/home/httpd/html/adm/lonLCDfont/n.gif" ] ,
128: "/adm/lonLCDfont/o.gif" => [ "image/gif", "FILE",
129: "/home/httpd/html/adm/lonLCDfont/o.gif" ] ,
130: "/adm/lonLCDfont/p.gif" => [ "image/gif", "FILE",
131: "/home/httpd/html/adm/lonLCDfont/p.gif" ] ,
132: "/adm/lonLCDfont/q.gif" => [ "image/gif", "FILE",
133: "/home/httpd/html/adm/lonLCDfont/q.gif" ] ,
134: "/adm/lonLCDfont/r.gif" => [ "image/gif", "FILE",
135: "/home/httpd/html/adm/lonLCDfont/r.gif" ] ,
136: "/adm/lonLCDfont/s.gif" => [ "image/gif", "FILE",
137: "/home/httpd/html/adm/lonLCDfont/s.gif" ] ,
138: "/adm/lonLCDfont/t.gif" => [ "image/gif", "FILE",
139: "/home/httpd/html/adm/lonLCDfont/t.gif" ] ,
140: "/adm/lonLCDfont/u.gif" => [ "image/gif", "FILE",
141: "/home/httpd/html/adm/lonLCDfont/u.gif" ] ,
142: "/adm/lonLCDfont/v.gif" => [ "image/gif", "FILE",
143: "/home/httpd/html/adm/lonLCDfont/v.gif" ] ,
144: "/adm/lonLCDfont/w.gif" => [ "image/gif", "FILE",
145: "/home/httpd/html/adm/lonLCDfont/w.gif" ] ,
146: "/adm/lonLCDfont/x.gif" => [ "image/gif", "FILE",
147: "/home/httpd/html/adm/lonLCDfont/x.gif" ] ,
148: "/adm/lonLCDfont/y.gif" => [ "image/gif", "FILE",
149: "/home/httpd/html/adm/lonLCDfont/y.gif" ] ,
150: "/adm/lonLCDfont/z.gif" => [ "image/gif", "FILE",
151: "/home/httpd/html/adm/lonLCDfont/z.gif" ] ,
152: "/adm/lonLCDfont/colon.gif" => [ "image/gif", "FILE",
153: "/home/httpd/html/adm/lonLCDfont/colon.gif" ] ,
154: "/adm/lonLCDfont/slash.gif" => [ "image/gif", "FILE",
155: "/home/httpd/html/adm/lonLCDfont/slash.gif" ] ,
156: "/adm/lonLCDfont/hyphen.gif" => [ "image/gif", "FILE",
157: "/home/httpd/html/adm/lonLCDfont/hyphen.gif" ] ,
158: "/adm/lonLCDfont/space.gif" => [ "image/gif", "FILE",
159: "/home/httpd/html/adm/lonLCDfont/space.gif" ] ,
160: );
161:
162: %content_types = (%system_content_types, %content_types);
163: undef %system_content_types;
164:
165: while (($file, $arrayref) = each(%virtual_files)) {
166: my ($mime, $type, $block) = (@{ $arrayref });
167: next if ($type ne 'FILE');
168: if(open(S, "$block")) {
169: $j = $/; undef $/; $virtual_files{$file}->[2] = scalar(<S>);
170: $/ = $j; close(S);
171: } else {
172: warn "while getting virtual file $file: $!\n";
173: map_delete(%virtual_files, $file);
174: }
175: }
176: if ($pid = fork()) { exit; }
177:
178: #
179: # Store parent PID
180: #
181:
182: open (PIDSAVE,">$pidfile");
183: print PIDSAVE "$$\n";
184: close(PIDSAVE);
185:
186: $0 = "dhttpi: binding port ...";
187: $bindthis = pack($sockaddr, 2, 8080, pack('l', chr(0).chr(0).chr(0).chr(0)));
188: socket(S, 2, 1, 6);
189: setsockopt(S, 1, 2, 1);
190: bind(S, $bindthis) || die("$0: while binding port 8080:\n\"$!\"\n");
191: listen(S, 128);
192: $0 = "dhttpi: connected and waiting ANY:8080";
193:
194: $statiosuptime = time();
195:
196: ###############################################################
197: # WHITE HATS ONLY BELOW THIS POINT -- SEE DOCUMENTATION FIRST #
198: ###############################################################
199:
200: sub sock_to_host {
201: local($sock) = getpeername(STDIN);
202:
203: return (undef, undef, undef) if (!$sock);
204: local($AFC, $port, $thataddr, $zero) = unpack($sockaddr, $sock);
205: local($ip) = join('.', unpack("C4", $thataddr));
206: return ($ip, $port, $ip);
207: }
208:
209: sub htsponse {
210: ($currentcode, $currentstring) = (@_);
211: return if (0+$httpver < 1);
212: local($what) = <<"EOF";
213: HTTP/$httpver $currentcode $currentstring
214: ${headers}Date: $rfcdate
215: EOF
216: $what =~ s/\n/\r\n/g;
217: print stdout $what;
218: &hthead("Connection: close") if (0+$httpver > 1);
219: }
220:
221: sub hthead {
222: local($header, $term) = (@_);
223: return if (0+$httpver < 1);
224: print stdout "$header\r\n" , ($term) ? "\r\n" : "";
225: }
226:
227: sub htcontent {
228: local($what, $ctype, $mode) = (@_);
229: ($contentlength) = $mode || length($what);
230: &hthead("Content-Length: $contentlength");
231: &hthead("Content-Type: $ctype", 1);
232: return if ($method eq 'HEAD' || $mode);
233: print stdout $what;
234: }
235:
236: sub log {
237: if (open(J, ">>$logfile")) {
238: local $q = $address . (($variables) ? "?$variables" : "");
239: $contentlength += 0;
240: $contentlength = 0 if ($method eq 'HEAD');
241: local ($hostname, $port, $ip) = &sock_to_host();
242: $hostname = $hostname || "-";
243: $httpuser = $httpuser || "-";
244: print J <<"EOF";
245: $hostname - $httpuser [$date] "$method $q HTTP/$httpver" $currentcode $contentlength "$httpref" "$httpua"
246: EOF
247: close(J); }
248: }
249:
250:
251: sub bye { unlink($pidfile); exit; }
252:
253: sub dead {
254: &htsponse(500, "Server Error");
255: &hterror("Server Error", <<"EOF");
256: While handling a request for resource $address, the server crashed. Please
257: attempt to notify the administrators.
258: <p>Useful(?) debugging information:
259: <pre>
260: @_
261: </pre>
262: EOF
263: &log; unlink($pidfile); exit;
264: }
265:
266: $SIG{'__DIE__'} = \&dead;
267: $SIG{'ALRM'} = $SIG{'TERM'} = $SIG{'INT'} = \&bye;
268:
269: sub master {
270: $0 = "dhttpi: handling request";
271: # $sock = getpeername(STDIN);
272: $rfcdate = scalar gmtime;
273: ($dow, $mon, $dt, $tm, $yr) = ($rfcdate =~
274: m/(...) (...) (..) (..:..:..) (....)/);
275: $dt += 0; $yr += 0;
276: $rfcdate = "$dow, $dt $mon $yr $tm GMT";
277: $date = scalar localtime;
278: ($dow, $mon, $dt, $tm, $yr) = ($date =~
279: m/(...) (...) (..) (..:..:..) (....)/);
280: $dt += 0;
281: $dt = substr("0$dt", length("0$dt") - 2, 2);
282: $date = "$dt/$mon/$yr:$tm +0000";
283:
284: select(STDOUT); $|=1; $address = 0;
285: alarm 1;
286: while (<STDIN>) {
287: if(/^([A-Z]+)\s+([^\s]+)\s+([^\s\r\l\n]*)/) {
288: $method = $1;
289: $address = $2;
290: $httpver = $3;
291: $httpref = '';
292: $httpua = '';
293: $httpver = ($httpver =~ m#HTTP/([0-9]\.[0-9]+)#) ?
294: ($1) : (0.9);
295: $address =~ s#^http://[^/]+/#/#;
296: next unless ($httpver < 1);
297: } else {
298: s/[\r\l\n\s]+$//;
299: (/^Host: (.+)/i) && ($httphost = $1) && ($httphost =~
300: s/:\d+$//);
301: (/^Referer: (.+)/i) && ($httpref = $1);
302: (/^User-agent: (.+)/i) && ($httpua = $1);
303: (/^Content-length: (\d+)/i) && ($ENV{'CONTENT_LENGTH'} =
304: $httpcl = $1);
305: (/^Content-type: (.+)/i) && ($ENV{'CONTENT_TYPE'} =
306: $httpct = $1);
307: (/^Expect: /) && ($expect = 1);
308: (/^Authorization: Basic (.+)/i) && ($httprawu = $1);
309: (/^Range: (.+)/i) && ($ENV{'CONTENT_RANGE'} = $1);
310: next unless (/^$/);
311: }
312: if ($expect) {
313: &htsponse(417, "Expectation Failed");
314: &hterror("Expectation Failed",
315: "The server does not support this method.");
316: &log; exit;
317: }
318: if (!$address || (0+$httpver > 1 && !$httphost)) {
319: &htsponse(400, "Bad Request");
320: &hterror("Bad Request",
321: "The server cannot understand your request.");
322: &log; exit;
323: }
324: if ($method !~ /^(GET|HEAD|POST)$/) {
325: &htsponse(501, "Illegal Method");
326: &hterror("Illegal Method",
327: "Only GET, HEAD and POST are supported.");
328: &log; exit;
329: }
330: ($address, $variables) = split(/\?/, $address);
331: $address =~ s/%([0-9a-fA-F]{2})/pack("H2", $1)/eg;
332: $address=~ s#^/?#/#;
333: 1 while $address =~ s#/\.(/|$)#\1#;
334: 1 while $address =~ s#/[^/]*/\.\.(/|$)#\1#;
335: 1 while $address =~ s#^/\.\.(/|$)#\1#;
336: $fail = 0;
337: #
338: # Heavily customized for LON-CAPA
339: #
340: unless ($address=~/^\/(status|adm\/|res\/adm\/)/) { $fail=1; }
341: #
342: # because existing restriction matrix would not do precedence across rules
343: #
344: # J: foreach(sort { length $a <=> length $b }
345: # keys %restrictions) {
346: # next if ($address !~ /^$_/);
347: # ($allowip, $denyip, $allowua, $denyua, $auser) =
348: # split(/#/, $restrictions{$_});
349: # if ($allowip || $denyip) {
350: # ($hostname, $port, $ip) = &sock_to_host();
351: # ($allowip && $ip !~ /$allowip/) && ($fail = 1,
352: # last J);
353: # ($denyip && $ip =~ /$denyip/) && ($fail = 1,
354: # last J);
355: # }
356: # ($allowua && $httpua !~ /$allowua/) &&
357: # ($fail = 2, last J);
358: # ($denyua && $httpua =~ /$denyua/) &&
359: # ($fail = 2, last J);
360: # }
361: if ($fail) {
362: &htsponse(403, "Forbidden");
363: if ($fail == 1) {
364: &hterror("Forbidden (Client Disallowed)", <<"EOF");
365: Your network address (<i>$ip</i>) is not allowed to access this resource.
366: EOF
367: &log; exit;
368: } else {
369: &hterror("Forbidden (Browser Disallowed)", <<"EOF");
370: The browser you are using (<i>$httpua</i>) is not capable of or
371: is not allowed access to this resource.
372: EOF
373: &log; exit;
374: }
375: }
376: if ($auser) {
377: $httprawu =~ tr#A-Za-z0-9+/##cd;
378: $httprawu =~ tr#A-Za-z0-9+/# -_#;
379: $httprawu = unpack("u", pack("c", 32+0.75*length($httprawu))
380: . $httprawu);
381: ($httpuser, $httppw) = split(/:/, $httprawu);
382: $fail = 1;
383: foreach $user (split(/,/, $auser)) {
384: ($user, $pw) = split(/:/, $user);
385: ($fail = 0, last) if ($user eq $httpuser &&
386: crypt($httppw, substr($pw, 0, 2)) eq $pw);
387: }
388: if ($fail) {
389: $httpuser = '';
390: &htsponse(401, "Authorization Required");
391: &hthead("WWW-Authenticate: Basic realm=\"$address\"");
392: &hterror("Authorization Required", <<"EOF");
393: You must provide a username and password to use this resource. Either you
394: entered this information incorrectly, or your browser does not know how to
395: present the credentials required.
396: EOF
397: &log; exit;
398: }
399: }
400:
401: alarm 0;
402:
403: if ($address eq '/status') {
404: &htsponse(200, "OK");
405: $contentlength = 0; # kludge
406: &log;
407: if(open(S, $logfile)) {
408: seek(S, -5000, 2);
409: undef $/;
410: $logsnap = <S>;
411: $logsnap =~ s/^[^\n]+\n//s if
412: (length($logsnap) > 4999);
413: close(S);
414: }
415: $p = (time() - $statiosuptime);
416: $rps = $p/$statiosreq;
417: $d = int($p / 86400); $p -= $d * 86400;
418: $h = int($p / 3600); $p -= $h * 3600;
419: $m = int($p / 60); $s = $p - ($m * 60);
420: ("0$s" =~ /(\d{2})$/) && ($s = $1);
421: ("0$m" =~ /(\d{2})$/) && ($m = $1);
422: $h +=0; $d += 0;
423: $suptime = scalar localtime $statiosuptime;
424: &htcontent(<<"EOF", "text/html");
425: <html>
426: <head>
427: <title>
428: HTTPi Status
429: </title>
430: </head>
431: <body bgcolor = "#ffffff" text = "#000000" vlink = "#0000ff" link = "#0000ff">
432: <h1>HTTPi Server Status (<code>$VERSION</code>)</h1>
433: <h3>lonhttpd on port 8080</h3>
434: <b>Started at:</b> $suptime<br>
435: <b>Uptime:</b> $d days, $h:$m:$s<br>
436: <b>Last request time:</b> $statiosltr<p>
437: <b>Requests received:</b> $statiosreq<br>
438: <b>Average time between requests:</b> ${rps}s
439: <p>
440: <b>Most recent requests:</b>
441: <form action = "/status" method = "post">
442: <textarea name = "bletch" rows = "8" cols = "70">
443: $logsnap
444: </textarea>
445: </form>
446: <hr>
447: <address>maintained by <a href =
448: "http://httpi.floodgap.com/">httpi/$VERSION</a></address>
449: </body>
450: </html>
451: EOF
452: exit;
453: }
454: if (defined $virtual_files{$address}) {
455: $virt_buffer = 1;
456: $mtime = $statiosuptime; # thus always needed
457: goto SERVEIT; # yes, it's bad but it's fast
458: }
459: $raddress = "$path$address"
460: ;
461: &hterror301("$address/")
462: if ($address !~ m#/$# && -d $raddress);
463: $raddress = "${raddress}index.html" if (-d $raddress);
464: if(!sysopen(S, $raddress, 0)) { &hterror404; } else {
465: if (-x $raddress) {
466: $currentcode = 100;
467: &log;
468: if (!$<) {
469: ($x,$x,$x,$x,$uid,$gid) = stat(S);
470: (!$uid || !$gid) &&
471: die "executable is root-owned";
472: $> = $uid || die "can't set effuid";
473: $) = $gid || die "can't set effgid";
474: }
475: ($hostname, $port, $ip) = &sock_to_host() if (!$port);
476: $ENV{'REQUEST_METHOD'} = $method;
477: $ENV{'SERVER_NAME'} = "localhost";
478: $ENV{'SERVER_PROTOCOL'} = "HTTP/$httpver";
479: $ENV{'SERVER_SOFTWARE'} = "HTTPi/$VERSION";
480: $ENV{'SERVER_PORT'} = "8080";
481: $ENV{'SERVER_URL'} = "http://localhost:8080/";
482: $ENV{'SCRIPT_FILENAME'} = $raddress;
483: $ENV{'SCRIPT_NAME'} = $address;
484: $ENV{'REMOTE_HOST'} = $hostname;
485: $ENV{'REMOTE_ADDR'} = $ip;
486: $ENV{'REMOTE_PORT'} = $port;
487: $ENV{'QUERY_STRING'} = $variables;
488: $ENV{'HTTP_USER_AGENT'} = $httpua;
489: $ENV{'HTTP_REFERER'} = $httpref;
490: if ($pid = fork()) { exit; } else {
491: if ($method eq 'POST') { # needs stdin
492: open(W, "|$raddress") || die
493: "can't POST to $raddress";
494: read(STDIN, $buf, $httpcl);
495: print W $buf;
496: exit;
497: }
498: exec "$raddress", "$variables";
499: die "exec() returned -1";
500: }
501: }
502: ($x,$x,$x,$x,$x,$x,$x,$length,$x,$mtime) = stat(S);
503: $ctype = 0;
504: foreach(keys %content_types) {
505: if ($raddress =~ /\.$_$/i) {
506: $ctype = $content_types{$_};
507: }
508: }
509: SERVEIT: $ctype ||= 'text/plain';
510: &htsponse(200, "OK");
511: $mtime = scalar gmtime $mtime;
512: ($dow, $mon, $dt, $tm, $yr) =
513: ($mtime =~ m/(...) (...) (..) (..:..:..) (....)/);
514: $dt += 0; $yr += 0;
515: &hthead("Last-Modified: $dow, $dt $mon $yr $tm GMT");
516: if ($pid = fork()) { exit; }
517: if ($virt_buffer) {
518: &htcontent($virtual_files{$address}->[2],
519: $virtual_files{$address}->[0], 0);
520: } else {
521: &htcontent("", $ctype, $length);
522: unless ($method eq 'HEAD') {
523: while(!eof(S)) {
524: read(S, $q, 16384);
525: print stdout $q;
526: }
527: }
528: }
529: alarm 0;
530: }
531: &log;
532: exit;
533: }
534:
535: exit;
536: }
537:
538:
539: sub hterror {
540: local($errstr, $expl) = (@_);
541: &htcontent(<<"EOF", "text/html");
542: <html>
543: <body>
544: <h1>$errstr</h1>
545: $expl
546: <hr>
547: <address><a href = "http://httpi.floodgap.com/">httpi/$VERSION</a>
548: by Cameron Kaiser</address>
549: </body>
550: </html>
551: EOF
552: }
553:
554: sub hterror404 {
555: &htsponse(404, "File Not Found");
556: &hterror("File Not Found",
557: "The resource $address was not found on this system.");
558: }
559:
560: sub hterror301 {
561: &htsponse(301, "Moved Permanently");
562: &hthead("Location: @_");
563: &hterror("Resource Moved Permanently",
564: "This resource has moved <a href = \"@_\">here</a>.");
565: $keep = 0; &log; exit;
566: }
567:
568: for (;;) {
569: $addr=accept(NS,S);
570: $statiosltr = scalar localtime;
571: $statiosreq++;
572: if ($pid = fork()) {
573: $0 = "dhttpi: waiting for child process";
574: waitpid($pid, 0);
575: $0 = "dhttpi: on ANY:8080, last request " .
576: scalar localtime;
577: } else {
578: $0 = "dhttpi: child switching to socket";
579: open(STDIN, "<&NS");
580: open(STDOUT, ">&NS");
581: &master;
582: exit;
583: }
584: }
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