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/cvs/Coro/myhttpd/httpd.pl
Revision: 1.7
Committed: Sat Aug 11 00:37:32 2001 UTC (22 years, 11 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.6: +14 -0 lines
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File Contents

# User Rev Content
1 root 1.1 use Coro;
2     use Coro::Semaphore;
3     use Coro::Event;
4     use Coro::Socket;
5    
6     no utf8;
7     use bytes;
8    
9     # at least on my machine, this thingy serves files
10     # quite a bit faster than apache, ;)
11     # and quite a bit slower than thttpd :(
12    
13     $SIG{PIPE} = 'IGNORE';
14    
15     sub slog {
16     my $level = shift;
17     my $format = shift;
18     printf "---: $format\n", @_;
19     }
20    
21     my $connections = new Coro::Semaphore $MAX_CONNECTS;
22    
23 root 1.6 my @newcons;
24 root 1.1 my @pool;
25    
26 root 1.2 # one "execution thread"
27 root 1.1 sub handler {
28     while () {
29 root 1.6 my $new = pop @newcons;
30     if ($new) {
31 root 1.1 eval {
32 root 1.6 conn->new(@$new)->handle;
33 root 1.1 };
34     slog 1, "$@" if $@ && !ref $@;
35     $connections->up;
36     } else {
37     last if @pool >= $MAX_POOL;
38     push @pool, $Coro::current;
39     schedule;
40     }
41     }
42     }
43    
44 root 1.4 my $http_port = new Coro::Socket
45     LocalAddr => $SERVER_HOST,
46     LocalPort => $SERVER_PORT,
47     ReuseAddr => 1,
48     Listen => 1,
49     or die "unable to start server";
50    
51     push @listen_sockets, $http_port;
52    
53 root 1.2 # the "main thread"
54 root 1.1 async {
55     slog 1, "accepting connections";
56     while () {
57     $connections->down;
58 root 1.6 push @newcons, [$http_port->accept];
59 root 1.1 #slog 3, "accepted @$connections ".scalar(@pool);
60 root 1.3 $::NOW = time;
61 root 1.1 if (@pool) {
62     (pop @pool)->ready;
63     } else {
64     async \&handler;
65     }
66    
67     }
68     };
69    
70     package conn;
71    
72     use Socket;
73     use HTTP::Date;
74 root 1.2 use Convert::Scalar 'weaken';
75    
76 root 1.3 our %conn; # $conn{ip}{fh} => connobj
77     our %blocked;
78 root 1.1
79     sub new {
80     my $class = shift;
81 root 1.6 my $peername = shift;
82 root 1.1 my $fh = shift;
83 root 1.2 my $self = bless { fh => $fh }, $class;
84 root 1.6 my (undef, $iaddr) = unpack_sockaddr_in $peername
85     or $self->err(500, "unable to decode peername");
86 root 1.7
87 root 1.3 $self->{remote_addr} = inet_ntoa $iaddr;
88 root 1.2
89     # enter ourselves into various lists
90 root 1.3 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
91    
92 root 1.2 $self;
93     }
94    
95     sub DESTROY {
96     my $self = shift;
97 root 1.3 delete $conn{$self->{remote_addr}}{$self*1};
98     delete $uri{$self->{uri}}{$self*1};
99 root 1.1 }
100    
101     sub slog {
102 root 1.4 my $self = shift;
103     main::slog($_[0], "$self->{remote_addr}> $_[1]");
104 root 1.1 }
105    
106 root 1.4 sub response {
107 root 1.1 my ($self, $code, $msg, $hdr, $content) = @_;
108     my $res = "HTTP/1.0 $code $msg\015\012";
109    
110 root 1.4 $res .= "Connection: close\015\012";
111     $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(
112 root 1.1
113     while (my ($h, $v) = each %$hdr) {
114     $res .= "$h: $v\015\012"
115     }
116 root 1.4
117 root 1.1 $res .= "\015\012$content" if defined $content;
118    
119 root 1.3 print STDERR "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";#d#
120 root 1.2
121 root 1.1 print {$self->{fh}} $res;
122     }
123    
124     sub err {
125     my $self = shift;
126     my ($code, $msg, $hdr, $content) = @_;
127    
128     unless (defined $content) {
129     $content = "$code $msg";
130     $hdr->{"Content-Type"} = "text/plain";
131     $hdr->{"Content-Length"} = length $content;
132     }
133    
134 root 1.4 $self->response($code, $msg, $hdr, $content);
135 root 1.1
136     die bless {}, err::;
137     }
138    
139 root 1.3 sub err_blocked {
140     my $self = shift;
141     my $ip = $self->{remote_addr};
142     my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
143     $self->err(403, "too many connections",
144 root 1.4 {
145     "Content-Type" => "text/html",
146     "Retry-After" => $::BLOCKTIME
147     },
148 root 1.3 <<EOF);
149 root 1.4 <html><p>
150 root 1.3 You have been blocked because you opened too many connections. You
151 root 1.4 may retry at</p>
152    
153     <p><blockquote>$time.</blockquote></p>
154    
155     <p>Until then, each new access will renew the block. You might want to have a
156     look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
157     </html>
158 root 1.3 EOF
159     }
160    
161 root 1.1 sub handle {
162     my $self = shift;
163     my $fh = $self->{fh};
164    
165     #while() {
166     $self->{h} = {};
167    
168     # read request and parse first line
169     $fh->timeout($::REQ_TIMEOUT);
170     my $req = $fh->readline("\015\012\015\012");
171     $fh->timeout($::RES_TIMEOUT);
172    
173     defined $req or
174     $self->err(408, "request timeout");
175    
176 root 1.3 my $ip = $self->{remote_addr};
177    
178     if ($blocked{$ip}) {
179     $self->err_blocked($blocked{$ip})
180     if $blocked{$ip} > $::NOW;
181    
182     delete $blocked{$ip};
183     }
184    
185     if (%{$conn{$ip}} > $::MAX_CONN_IP) {
186     $self->slog("blocked ip $ip");
187     $self->err_blocked;
188     }
189    
190 root 1.1 $req =~ /^(?:\015\012)?
191     (GET|HEAD) \040+
192     ([^\040]+) \040+
193     HTTP\/([0-9]+\.[0-9]+)
194     \015\012/gx
195     or $self->err(403, "method not allowed", { Allow => "GET,HEAD" });
196    
197     $2 ne "1.0"
198     or $self->err(506, "http protocol version not supported");
199    
200     $self->{method} = $1;
201     $self->{uri} = $2;
202    
203     # parse headers
204     {
205     my (%hdr, $h, $v);
206    
207     $hdr{lc $1} .= ",$2"
208     while $req =~ /\G
209     ([^:\000-\040]+):
210     [\008\040]*
211     ((?: [^\015\012]+ | \015\012[\008\040] )*)
212     \015\012
213     /gxc;
214    
215     $req =~ /\G\015\012$/
216     or $self->err(400, "bad request");
217    
218     $self->{h}{$h} = substr $v, 1
219     while ($h, $v) = each %hdr;
220     }
221    
222     $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;
223 root 1.3
224     weaken ($uri{$self->{uri}}{$self*1} = $self);
225 root 1.1
226     $self->map_uri;
227     $self->respond;
228     #}
229     }
230    
231     # uri => path mapping
232     sub map_uri {
233     my $self = shift;
234     my $host = $self->{h}{host} || "default";
235     my $uri = $self->{uri};
236    
237     # some massaging, also makes it more secure
238     $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
239     $uri =~ s%//+%/%g;
240     $uri =~ s%/\.(?=/|$)%%g;
241     1 while $uri =~ s%/[^/]+/\.\.(?=/|$)%%;
242    
243     $uri =~ m%^/?\.\.(?=/|$)%
244     and $self->err(400, "bad request");
245    
246     $self->{name} = $uri;
247    
248     # now do the path mapping
249     $self->{path} = "$::DOCROOT/$host$uri";
250 root 1.7
251     $self->access_check;
252 root 1.1 }
253    
254     sub server_address {
255     my $self = shift;
256     my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
257     or $self->err(500, "unable to get socket name");
258     ((inet_ntoa $iaddr), $port);
259     }
260    
261     sub server_host {
262     my $self = shift;
263     if (exists $self->{h}{host}) {
264     return $self->{h}{host};
265     } else {
266     return (($self->server_address)[0]);
267     }
268     }
269    
270     sub server_hostport {
271     my $self = shift;
272     my ($host, $port);
273     if (exists $self->{h}{host}) {
274     ($host, $port) = ($self->{h}{host}, $self->{server_port});
275     } else {
276     ($host, $port) = $self->server_address;
277     }
278     $port = $port == 80 ? "" : ":$port";
279     $host.$port;
280     }
281    
282     sub _cgi {
283     my $self = shift;
284     my $path = shift;
285     my $fh;
286    
287     # no two-way xxx supported
288     if (0 == fork) {
289     open STDOUT, ">&".fileno($self->{fh});
290     if (chdir $::DOCROOT) {
291     $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
292     $ENV{HTTP_HOST} = $self->server_host;
293     $ENV{HTTP_PORT} = $self->{server_host};
294     $ENV{SCRIPT_NAME} = $self->{name};
295     exec $::INDEXPROG;
296     }
297     Coro::State::_exit(0);
298     } else {
299     }
300     }
301    
302     sub respond {
303     my $self = shift;
304     my $path = $self->{path};
305    
306     stat $path
307     or $self->err(404, "not found");
308    
309     # idiotic netscape sends idiotic headers AGAIN
310     my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
311     ? str2time $1 : 0;
312    
313     if (-d _ && -r _) {
314     # directory
315     if ($path !~ /\/$/) {
316     # create a redirect to get the trailing "/"
317     my $host = $self->server_hostport;
318     $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" });
319     } else {
320     $ims < (stat _)[9]
321     or $self->err(304, "not modified");
322    
323     if ($self->{method} eq "GET") {
324     if (-r "$path/index.html") {
325     $self->{path} .= "/index.html";
326     $self->handle_file;
327     } else {
328     $self->handle_dir;
329     }
330     }
331     }
332     } elsif (-f _ && -r _) {
333     -x _ and $self->err(403, "forbidden");
334     $self->handle_file;
335     } else {
336     $self->err(404, "not found");
337     }
338     }
339    
340     sub handle_dir {
341     my $self = shift;
342     $self->_cgi($::INDEXPROG);
343     }
344    
345     sub handle_file {
346     my $self = shift;
347     my $length = -s _;
348     my $hdr = {
349     "Last-Modified" => time2str ((stat _)[9]),
350     };
351    
352     my @code = (200, "ok");
353     my ($l, $h);
354    
355     if ($self->{h}{range} =~ /^bytes=(.*)$/) {
356     for (split /,/, $1) {
357     if (/^-(\d+)$/) {
358     ($l, $h) = ($length - $1, $length - 1);
359     } elsif (/^(\d+)-(\d*)$/) {
360     ($l, $h) = ($1, ($2 ne "" || $2 >= $length) ? $2 : $length - 1);
361     } else {
362     ($l, $h) = (0, $length - 1);
363     goto ignore;
364     }
365     goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h > $l;
366     }
367     $hdr->{"Content-Range"} = "bytes */$length";
368     $self->err(416, "not satisfiable", $hdr);
369    
370     satisfiable:
371 root 1.4 # check for segmented downloads
372     if ($l && $NO_SEGMENTED) {
373     if (%{$uri{$self->{uri}}} > 1) {
374     $self->slog("segmented download refused\n");
375     $self->err(400, "segmented downloads are not allowed");
376     }
377     }
378    
379 root 1.1 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
380     @code = (206, "partial content");
381     $length = $h - $l + 1;
382    
383     ignore:
384     } else {
385     ($l, $h) = (0, $length - 1);
386     }
387    
388     if ($self->{path} =~ /\.html$/) {
389     $hdr->{"Content-Type"} = "text/html";
390     } else {
391     $hdr->{"Content-Type"} = "application/octet-stream";
392     }
393    
394     $hdr->{"Content-Length"} = $length;
395    
396 root 1.4 $self->response(@code, $hdr, "");
397 root 1.1
398     if ($self->{method} eq "GET") {
399     my ($fh, $buf);
400     open $fh, "<", $self->{path}
401     or die "$self->{path}: late open failure ($!)";
402    
403     if ($l) {
404     sysseek $fh, $l, 0
405     or die "$self->{path}: cannot seek to $l ($!)";
406     }
407    
408     $h -= $l - 1;
409    
410     while ($h > 0) {
411 root 1.5 $h -= sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h;
412     $self->{fh}->syswrite($buf)
413 root 1.1 or last;
414     }
415     }
416    
417     close $fh;
418 root 1.7 }
419    
420     sub access_check {
421     my $self = shift;
422     my $whois = ::ip_request($self->{remote_addr});
423    
424     if ($whois =~ /^\*cy: (\S+)/m) {
425     $self->slog(9, "COUNTRY($1)");
426     } else {
427     $self->slog(9, "no country($whois)");
428     }
429 root 1.1 }
430 root 1.2
431     1;