Coro/myhttpd/httpd.pl

use Coro;
use Coro::Semaphore;
use Coro::Event;
use Coro::Socket;

use HTTP::Date;

no utf8;
use bytes;

# at least on my machine, this thingy serves files
# quite a bit faster than apache, ;)
# and quite a bit slower than thttpd :(

$SIG{PIPE} = 'IGNORE';

our $accesslog;

if ($ACCESS_LOG) {
   use IO::Handle;
   open $accesslog, ">>$ACCESS_LOG"
     or die "$ACCESS_LOG: $!";
   $accesslog->autoflush(1);
}

sub slog {
   my $level = shift;
   my $format = shift;
   printf "---: $format\n", @_;
}

our $connections = new Coro::Semaphore $MAX_CONNECTS || 250;

our $wait_factor = 0.95;

our @transfers = (
  [(new Coro::Semaphore $MAX_TRANSFERS_SMALL || 50), 1],
  [(new Coro::Semaphore $MAX_TRANSFERS_LARGE || 50), 1],
);

my @newcons;
my @pool;

# one "execution thread"
sub handler {
   while () {
      if (@newcons) {
         eval {
            conn->new(@{pop @newcons})->handle;
         };
         slog 1, "$@" if $@ && !ref $@;
         $connections->up;
      } else {
         last if @pool >= $MAX_POOL;
         push @pool, $Coro::current;
         schedule;
      }
   }
}

sub listen_on {
   my $listen = $_[0];

   push @listen_sockets, $listen;

   # the "main thread"
   async {
      slog 1, "accepting connections";
      while () {
         $connections->down;
         push @newcons, [$listen->accept];
         #slog 3, "accepted @$connections ".scalar(@pool);
         if (@pool) {
            (pop @pool)->ready;
         } else {
            async \&handler;
         }

      }
   };
}

my $http_port = new Coro::Socket
        LocalAddr => $SERVER_HOST,
        LocalPort => $SERVER_PORT,
        ReuseAddr => 1,
        Listen => 50,
   or die "unable to start server";

listen_on $http_port;

if ($SERVER_PORT2) {
   my $http_port = new Coro::Socket
           LocalAddr => $SERVER_HOST,
           LocalPort => $SERVER_PORT2,
           ReuseAddr => 1,
           Listen => 50,
      or die "unable to start server";

   listen_on $http_port;
}

our $NOW;
our $HTTP_NOW;

Event->timer(interval => 1, hard => 1, cb => sub {
   $NOW = time;
   $HTTP_NOW = time2str $NOW;
})->now;

package conn;

use Socket;
use HTTP::Date;
use Convert::Scalar 'weaken';
use Linux::AIO;

Linux::AIO::min_parallel $::AIO_PARALLEL;

Event->io(fd => Linux::AIO::poll_fileno,
          poll => 'r', async => 1,
          cb => \&Linux::AIO::poll_cb);

our %conn; # $conn{ip}{self} => connobj
our %uri;  # $uri{ip}{uri}{self}
our %blocked;
our %mimetype;

sub read_mimetypes {
   local *M;
   if (open M, "<mime_types") {
      while (<M>) {
         if (/^([^#]\S+)\t+(\S+)$/) {
            $mimetype{lc $1} = $2;
         }
      }
   } else {
      print "cannot open mime_types\n";
   }
}

read_mimetypes;

sub new {
   my $class = shift;
   my $fh = shift;
   my $peername = shift;
   my $self = bless { fh => $fh }, $class;
   my (undef, $iaddr) = unpack_sockaddr_in $peername
      or $self->err(500, "unable to decode peername");

   $self->{remote_addr} = inet_ntoa $iaddr;
   $self->{time} = $::NOW;

   $::conns++;

   $self;
}

sub DESTROY {
   my $self = shift;
   $::conns--;
   $self->eoconn;
}

# end of connection
sub eoconn {
   my $self = shift;

   # clean up hints
   delete $conn{$self->{remote_id}}{$self*1};
   delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
}

sub slog {
   my $self = shift;
   main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
}

sub response {
   my ($self, $code, $msg, $hdr, $content) = @_;
   my $res = "HTTP/1.1 $code $msg\015\012";

   $self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;

   $res .= "Date: $HTTP_NOW\015\012";

   while (my ($h, $v) = each %$hdr) {
      $res .= "$h: $v\015\012"
   }
   $res .= "\015\012";

   $res .= $content if defined $content and $self->{method} ne "HEAD";

   my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";

   print $accesslog $log if $accesslog;
   print STDERR $log;

   $self->{written} +=
      print {$self->{fh}} $res;
}

sub err {
   my $self = shift;
   my ($code, $msg, $hdr, $content) = @_;

   unless (defined $content) {
      $content = "$code $msg\n";
      $hdr->{"Content-Type"} = "text/plain";
      $hdr->{"Content-Length"} = length $content;
   }
   $hdr->{"Connection"} = "close";

   $self->response($code, $msg, $hdr, $content);

   die bless {}, err::;
}

sub handle {
   my $self = shift;
   my $fh = $self->{fh};

   my $host;

   $fh->timeout($::REQ_TIMEOUT);
   while() {
      $self->{reqs}++;

      # read request and parse first line
      my $req = $fh->readline("\015\012\015\012");

      unless (defined $req) {
         if (exists $self->{version}) {
            last;
         } else {
            $self->err(408, "request timeout");
         }
      }

      $self->{h} = {};

      $fh->timeout($::RES_TIMEOUT);

      $req =~ /^(?:\015\012)?
                (GET|HEAD) \040+
                ([^\040]+) \040+
                HTTP\/([0-9]+\.[0-9]+)
                \015\012/gx
         or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });

      $self->{method} = $1;
      $self->{uri} = $2;
      $self->{version} = $3;

      $3 =~ /^1\./
         or $self->err(506, "http protocol version $3 not supported");

      # parse headers
      {
         my (%hdr, $h, $v);

         $hdr{lc $1} .= ",$2"
            while $req =~ /\G
                  ([^:\000-\040]+):
                  [\008\040]*
                  ((?: [^\015\012]+ | \015\012[\008\040] )*)
                  \015\012
               /gxc;

         $req =~ /\G\015\012$/
            or $self->err(400, "bad request");

         $self->{h}{$h} = substr $v, 1
            while ($h, $v) = each %hdr;
      }

      # remote id should be unique per user
      my $id = $self->{remote_addr};

      if (exists $self->{h}{"client-ip"}) {
         $id .= "[".$self->{h}{"client-ip"}."]";
      } elsif (exists $self->{h}{"x-forwarded-for"}) {
         $id .= "[".$self->{h}{"x-forwarded-for"}."]";
      }

      $self->{remote_id} = $id;

      if ($blocked{$id}) {
         $self->err_blocked($blocked{$id})
            if $blocked{$id} > $::NOW;

         delete $blocked{$id};
      }

      if (%{$conn{$id}} >= $::MAX_CONN_IP) {
         my $delay = $::PER_TIMEOUT + 15;
         while (%{$conn{$id}} >= $::MAX_CONN_IP) {
            if ($delay <= 0) {
               $self->slog(2, "blocked ip $id");
               $self->err_blocked;
            } else {
               Coro::Event::do_timer(after => 4); $delay -= 4;
            }
         }
      }

      # find out server name and port
      if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
         $host = $1;
      } else {
         $host = $self->{h}{host};
      }

      if (defined $host) {
         $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
      } else {
         ($self->{server_port}, $host)
            = unpack_sockaddr_in $self->{fh}->getsockname
               or $self->err(500, "unable to get socket name");
         $host = inet_ntoa $host;
      }

      $self->{server_name} = $host;

      # enter ourselves into various lists
      weaken ($conn{$id}{$self*1} = $self);
      weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);

      eval {
         $self->map_uri;
         $self->respond;
      };

      $self->eoconn;

      die if $@ && !ref $@;

      last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;

      $fh->timeout($::PER_TIMEOUT);
   }
}

# uri => path mapping
sub map_uri {
   my $self = shift;
   my $host = $self->{server_name};
   my $uri = $self->{uri};

   # some massaging, also makes it more secure
   $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
   $uri =~ s%//+%/%g;
   $uri =~ s%/\.(?=/|$)%%g;
   1 while $uri =~ s%/[^/]+/\.\.(?=/|$)%%;

   $uri =~ m%^/?\.\.(?=/|$)%
      and $self->err(400, "bad request");

   $self->{name} = $uri;

   # now do the path mapping
   $self->{path} = "$::DOCROOT/$host$uri";

   $self->access_check;
}

sub _cgi {
   my $self = shift;
   my $path = shift;
   my $fh;

   # no two-way xxx supported
   if (0 == fork) {
      open STDOUT, ">&".fileno($self->{fh});
      if (chdir $::DOCROOT) {
         $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
         $ENV{HTTP_HOST}       = $self->{server_name};
         $ENV{HTTP_PORT}       = $self->{server_port};
         $ENV{SCRIPT_NAME}     = $self->{name};
         exec $path;
      }
      Coro::State::_exit(0);
   } else {
      die;
   }
}

sub server_hostport {
   $_[0]{server_port} == 80
      ? $_[0]{server_name}
      : "$_[0]{server_name}:$_[0]{server_port}";
}

sub respond {
   my $self = shift;
   my $path = $self->{path};

   stat $path
      or $self->err(404, "not found");

   $self->{stat} = [stat _];

   # idiotic netscape sends idiotic headers AGAIN
   my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
             ? str2time $1 : 0;

   if (-d _ && -r _) {
      # directory
      if ($path !~ /\/$/) {
         # create a redirect to get the trailing "/"
         # we don't try to avoid the :80
         $self->err(301, "moved permanently", { Location =>  "http://".$self->server_hostport."$self->{uri}/" });
      } else {
         $ims < $self->{stat}[9]
            or $self->err(304, "not modified");

         if (-r "$path/index.html") {
            $self->{path} .= "/index.html";
            $self->handle_file;
         } else {
            $self->handle_dir;
         }
      }
   } elsif (-f _ && -r _) {
      -x _ and $self->err(403, "forbidden");
      $self->handle_file;
   } else {
      $self->err(404, "not found");
   }
}

sub handle_dir {
   my $self = shift;
   my $idx = $self->diridx;

   $self->response(200, "ok",
         {
            "Content-Type"   => "text/html",
            "Content-Length" => length $idx,
         },
         $idx);
}

sub handle_file {
   my $self = shift;
   my $length = $self->{stat}[7];
   my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
   my $hdr = {
      "Last-Modified"  => time2str ((stat _)[9]),
   };

   my @code = (200, "ok");
   my ($l, $h);

   if ($self->{h}{range} =~ /^bytes=(.*)$/) {
      for (split /,/, $1) {
         if (/^-(\d+)$/) {
            ($l, $h) = ($length - $1, $length - 1);
         } elsif (/^(\d+)-(\d*)$/) {
            ($l, $h) = ($1, ($2 ne "" || $2 >= $length) ? $2 : $length - 1);
         } else {
            ($l, $h) = (0, $length - 1);
            goto ignore;
         }
         goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
      }
      $hdr->{"Content-Range"} = "bytes */$length";
      $hdr->{"Content-Length"} = $length;
      $self->err(416, "not satisfiable", $hdr, "");

satisfiable:
      # check for segmented downloads
      if ($l && $::NO_SEGMENTED) {
         my $delay = $::PER_TIMEOUT + 15;
         while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
            if ($delay <= 0) {
               $self->err_segmented_download;
            } else {
               Coro::Event::do_timer(after => 4); $delay -= 4;
            }
         }
      }

      $hdr->{"Content-Range"} = "bytes $l-$h/$length";
      @code = (206, "partial content");
      $length = $h - $l + 1;

ignore:
   } else {
      ($l, $h) = (0, $length - 1);
   }

   $self->{path} =~ /\.([^.]+)$/;
   $hdr->{"Content-Type"} = $mimetype{lc $1} || "application/octet-stream";
   $hdr->{"Content-Length"} = $length;

   $self->response(@code, $hdr, "");

   if ($self->{method} eq "GET") {
      $self->{time} = $::NOW;

      my $fudge = $queue->[0]->waiters;
      $fudge = $fudge ? ($fudge+1)/$fudge : 1;

      $queue->[1] *= $fudge;
      my $transfer = $queue->[0]->guard;

      if ($fudge != 1) {
         $queue->[1] /= $fudge;
         $queue->[1] = $queue->[1] * $::wait_factor
                     + ($::NOW - $self->{time}) * (1 - $::wait_factor);
      }
      $self->{time} = $::NOW;

      $self->{fh}->writable or return;

      my ($fh, $buf, $r);
      my $current = $Coro::current;
      open $fh, "<", $self->{path}
         or die "$self->{path}: late open failure ($!)";

      $h -= $l - 1;

      if (0) {
         if ($l) {
            sysseek $fh, $l, 0;
         }
      }

      while ($h > 0) {
         if (0) {
            sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
               or last;
         } else {
            aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
                     $buf, 0, sub {
                        $r = $_[0];
                        Coro::ready($current);
                     });
            &Coro::schedule;
            last unless $r;
         }
         my $w = syswrite $self->{fh}, $buf
            or last;
         $::written += $w;
         $self->{written} += $w;
         $l += $r;
      }

      close $fh;
   }
}

1;
Revision:	1.42
Committed:	Wed Sep 12 16:45:59 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.41:	+2 -2 lines
Log Message:	* empty log message *
#	Content
1	use Coro;
2	use Coro::Semaphore;
3	use Coro::Event;
4	use Coro::Socket;
5
6	use HTTP::Date;
7
8	no utf8;
9	use bytes;
10
11	# at least on my machine, this thingy serves files
12	# quite a bit faster than apache, ;)
13	# and quite a bit slower than thttpd :(
14
15	$SIG{PIPE} = 'IGNORE';
16
17	our $accesslog;
18
19	if ($ACCESS_LOG) {
20	use IO::Handle;
21	open $accesslog, ">>$ACCESS_LOG"
22	or die "$ACCESS_LOG: $!";
23	$accesslog->autoflush(1);
24	}
25
26	sub slog {
27	my $level = shift;
28	my $format = shift;
29	printf "---: $format\n", @_;
30	}
31
32	our $connections = new Coro::Semaphore $MAX_CONNECTS \|\| 250;
33
34	our $wait_factor = 0.95;
35
36	our @transfers = (
37	[(new Coro::Semaphore $MAX_TRANSFERS_SMALL \|\| 50), 1],
38	[(new Coro::Semaphore $MAX_TRANSFERS_LARGE \|\| 50), 1],
39	);
40
41	my @newcons;
42	my @pool;
43
44	# one "execution thread"
45	sub handler {
46	while () {
47	if (@newcons) {
48	eval {
49	conn->new(@{pop @newcons})->handle;
50	};
51	slog 1, "$@" if $@ && !ref $@;
52	$connections->up;
53	} else {
54	last if @pool >= $MAX_POOL;
55	push @pool, $Coro::current;
56	schedule;
57	}
58	}
59	}
60
61	sub listen_on {
62	my $listen = $_[0];
63
64	push @listen_sockets, $listen;
65
66	# the "main thread"
67	async {
68	slog 1, "accepting connections";
69	while () {
70	$connections->down;
71	push @newcons, [$listen->accept];
72	#slog 3, "accepted @$connections ".scalar(@pool);
73	if (@pool) {
74	(pop @pool)->ready;
75	} else {
76	async \&handler;
77	}
78
79	}
80	};
81	}
82
83	my $http_port = new Coro::Socket
84	LocalAddr => $SERVER_HOST,
85	LocalPort => $SERVER_PORT,
86	ReuseAddr => 1,
87	Listen => 50,
88	or die "unable to start server";
89
90	listen_on $http_port;
91
92	if ($SERVER_PORT2) {
93	my $http_port = new Coro::Socket
94	LocalAddr => $SERVER_HOST,
95	LocalPort => $SERVER_PORT2,
96	ReuseAddr => 1,
97	Listen => 50,
98	or die "unable to start server";
99
100	listen_on $http_port;
101	}
102
103	our $NOW;
104	our $HTTP_NOW;
105
106	Event->timer(interval => 1, hard => 1, cb => sub {
107	$NOW = time;
108	$HTTP_NOW = time2str $NOW;
109	})->now;
110
111	package conn;
112
113	use Socket;
114	use HTTP::Date;
115	use Convert::Scalar 'weaken';
116	use Linux::AIO;
117
118	Linux::AIO::min_parallel $::AIO_PARALLEL;
119
120	Event->io(fd => Linux::AIO::poll_fileno,
121	poll => 'r', async => 1,
122	cb => \&Linux::AIO::poll_cb);
123
124	our %conn; # $conn{ip}{self} => connobj
125	our %uri; # $uri{ip}{uri}{self}
126	our %blocked;
127	our %mimetype;
128
129	sub read_mimetypes {
130	local *M;
131	if (open M, "<mime_types") {
132	while (<M>) {
133	if (/^([^#]\S+)\t+(\S+)$/) {
134	$mimetype{lc $1} = $2;
135	}
136	}
137	} else {
138	print "cannot open mime_types\n";
139	}
140	}
141
142	read_mimetypes;
143
144	sub new {
145	my $class = shift;
146	my $fh = shift;
147	my $peername = shift;
148	my $self = bless { fh => $fh }, $class;
149	my (undef, $iaddr) = unpack_sockaddr_in $peername
150	or $self->err(500, "unable to decode peername");
151
152	$self->{remote_addr} = inet_ntoa $iaddr;
153	$self->{time} = $::NOW;
154
155	$::conns++;
156
157	$self;
158	}
159
160	sub DESTROY {
161	my $self = shift;
162	$::conns--;
163	$self->eoconn;
164	}
165
166	# end of connection
167	sub eoconn {
168	my $self = shift;
169
170	# clean up hints
171	delete $conn{$self->{remote_id}}{$self*1};
172	delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
173	}
174
175	sub slog {
176	my $self = shift;
177	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
178	}
179
180	sub response {
181	my ($self, $code, $msg, $hdr, $content) = @_;
182	my $res = "HTTP/1.1 $code $msg\015\012";
183
184	$self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;
185
186	$res .= "Date: $HTTP_NOW\015\012";
187
188	while (my ($h, $v) = each %$hdr) {
189	$res .= "$h: $v\015\012"
190	}
191	$res .= "\015\012";
192
193	$res .= $content if defined $content and $self->{method} ne "HEAD";
194
195	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
196
197	print $accesslog $log if $accesslog;
198	print STDERR $log;
199
200	$self->{written} +=
201	print {$self->{fh}} $res;
202	}
203
204	sub err {
205	my $self = shift;
206	my ($code, $msg, $hdr, $content) = @_;
207
208	unless (defined $content) {
209	$content = "$code $msg\n";
210	$hdr->{"Content-Type"} = "text/plain";
211	$hdr->{"Content-Length"} = length $content;
212	}
213	$hdr->{"Connection"} = "close";
214
215	$self->response($code, $msg, $hdr, $content);
216
217	die bless {}, err::;
218	}
219
220	sub handle {
221	my $self = shift;
222	my $fh = $self->{fh};
223
224	my $host;
225
226	$fh->timeout($::REQ_TIMEOUT);
227	while() {
228	$self->{reqs}++;
229
230	# read request and parse first line
231	my $req = $fh->readline("\015\012\015\012");
232
233	unless (defined $req) {
234	if (exists $self->{version}) {
235	last;
236	} else {
237	$self->err(408, "request timeout");
238	}
239	}
240
241	$self->{h} = {};
242
243	$fh->timeout($::RES_TIMEOUT);
244
245	$req =~ /^(?:\015\012)?
246	(GET\|HEAD) \040+
247	([^\040]+) \040+
248	HTTP\/([0-9]+\.[0-9]+)
249	\015\012/gx
250	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
251
252	$self->{method} = $1;
253	$self->{uri} = $2;
254	$self->{version} = $3;
255
256	$3 =~ /^1\./
257	or $self->err(506, "http protocol version $3 not supported");
258
259	# parse headers
260	{
261	my (%hdr, $h, $v);
262
263	$hdr{lc $1} .= ",$2"
264	while $req =~ /\G
265	([^:\000-\040]+):
266	[\008\040]*
267	((?: [^\015\012]+ \| \015\012[\008\040] )*)
268	\015\012
269	/gxc;
270
271	$req =~ /\G\015\012$/
272	or $self->err(400, "bad request");
273
274	$self->{h}{$h} = substr $v, 1
275	while ($h, $v) = each %hdr;
276	}
277
278	# remote id should be unique per user
279	my $id = $self->{remote_addr};
280
281	if (exists $self->{h}{"client-ip"}) {
282	$id .= "[".$self->{h}{"client-ip"}."]";
283	} elsif (exists $self->{h}{"x-forwarded-for"}) {
284	$id .= "[".$self->{h}{"x-forwarded-for"}."]";
285	}
286
287	$self->{remote_id} = $id;
288
289	if ($blocked{$id}) {
290	$self->err_blocked($blocked{$id})
291	if $blocked{$id} > $::NOW;
292
293	delete $blocked{$id};
294	}
295
296	if (%{$conn{$id}} >= $::MAX_CONN_IP) {
297	my $delay = $::PER_TIMEOUT + 15;
298	while (%{$conn{$id}} >= $::MAX_CONN_IP) {
299	if ($delay <= 0) {
300	$self->slog(2, "blocked ip $id");
301	$self->err_blocked;
302	} else {
303	Coro::Event::do_timer(after => 4); $delay -= 4;
304	}
305	}
306	}
307
308	# find out server name and port
309	if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
310	$host = $1;
311	} else {
312	$host = $self->{h}{host};
313	}
314
315	if (defined $host) {
316	$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
317	} else {
318	($self->{server_port}, $host)
319	= unpack_sockaddr_in $self->{fh}->getsockname
320	or $self->err(500, "unable to get socket name");
321	$host = inet_ntoa $host;
322	}
323
324	$self->{server_name} = $host;
325
326	# enter ourselves into various lists
327	weaken ($conn{$id}{$self*1} = $self);
328	weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
329
330	eval {
331	$self->map_uri;
332	$self->respond;
333	};
334
335	$self->eoconn;
336
337	die if $@ && !ref $@;
338
339	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
340
341	$fh->timeout($::PER_TIMEOUT);
342	}
343	}
344
345	# uri => path mapping
346	sub map_uri {
347	my $self = shift;
348	my $host = $self->{server_name};
349	my $uri = $self->{uri};
350
351	# some massaging, also makes it more secure
352	$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
353	$uri =~ s%//+%/%g;
354	$uri =~ s%/\.(?=/\|$)%%g;
355	1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
356
357	$uri =~ m%^/?\.\.(?=/\|$)%
358	and $self->err(400, "bad request");
359
360	$self->{name} = $uri;
361
362	# now do the path mapping
363	$self->{path} = "$::DOCROOT/$host$uri";
364
365	$self->access_check;
366	}
367
368	sub _cgi {
369	my $self = shift;
370	my $path = shift;
371	my $fh;
372
373	# no two-way xxx supported
374	if (0 == fork) {
375	open STDOUT, ">&".fileno($self->{fh});
376	if (chdir $::DOCROOT) {
377	$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
378	$ENV{HTTP_HOST} = $self->{server_name};
379	$ENV{HTTP_PORT} = $self->{server_port};
380	$ENV{SCRIPT_NAME} = $self->{name};
381	exec $path;
382	}
383	Coro::State::_exit(0);
384	} else {
385	die;
386	}
387	}
388
389	sub server_hostport {
390	$_[0]{server_port} == 80
391	? $_[0]{server_name}
392	: "$_[0]{server_name}:$_[0]{server_port}";
393	}
394
395	sub respond {
396	my $self = shift;
397	my $path = $self->{path};
398
399	stat $path
400	or $self->err(404, "not found");
401
402	$self->{stat} = [stat _];
403
404	# idiotic netscape sends idiotic headers AGAIN
405	my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
406	? str2time $1 : 0;
407
408	if (-d _ && -r _) {
409	# directory
410	if ($path !~ /\/$/) {
411	# create a redirect to get the trailing "/"
412	# we don't try to avoid the :80
413	$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
414	} else {
415	$ims < $self->{stat}[9]
416	or $self->err(304, "not modified");
417
418	if (-r "$path/index.html") {
419	$self->{path} .= "/index.html";
420	$self->handle_file;
421	} else {
422	$self->handle_dir;
423	}
424	}
425	} elsif (-f _ && -r _) {
426	-x _ and $self->err(403, "forbidden");
427	$self->handle_file;
428	} else {
429	$self->err(404, "not found");
430	}
431	}
432
433	sub handle_dir {
434	my $self = shift;
435	my $idx = $self->diridx;
436
437	$self->response(200, "ok",
438	{
439	"Content-Type" => "text/html",
440	"Content-Length" => length $idx,
441	},
442	$idx);
443	}
444
445	sub handle_file {
446	my $self = shift;
447	my $length = $self->{stat}[7];
448	my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
449	my $hdr = {
450	"Last-Modified" => time2str ((stat _)[9]),
451	};
452
453	my @code = (200, "ok");
454	my ($l, $h);
455
456	if ($self->{h}{range} =~ /^bytes=(.*)$/) {
457	for (split /,/, $1) {
458	if (/^-(\d+)$/) {
459	($l, $h) = ($length - $1, $length - 1);
460	} elsif (/^(\d+)-(\d*)$/) {
461	($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
462	} else {
463	($l, $h) = (0, $length - 1);
464	goto ignore;
465	}
466	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
467	}
468	$hdr->{"Content-Range"} = "bytes */$length";
469	$hdr->{"Content-Length"} = $length;
470	$self->err(416, "not satisfiable", $hdr, "");
471
472	satisfiable:
473	# check for segmented downloads
474	if ($l && $::NO_SEGMENTED) {
475	my $delay = $::PER_TIMEOUT + 15;
476	while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
477	if ($delay <= 0) {
478	$self->err_segmented_download;
479	} else {
480	Coro::Event::do_timer(after => 4); $delay -= 4;
481	}
482	}
483	}
484
485	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
486	@code = (206, "partial content");
487	$length = $h - $l + 1;
488
489	ignore:
490	} else {
491	($l, $h) = (0, $length - 1);
492	}
493
494	$self->{path} =~ /\.([^.]+)$/;
495	$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
496	$hdr->{"Content-Length"} = $length;
497
498	$self->response(@code, $hdr, "");
499
500	if ($self->{method} eq "GET") {
501	$self->{time} = $::NOW;
502
503	my $fudge = $queue->[0]->waiters;
504	$fudge = $fudge ? ($fudge+1)/$fudge : 1;
505
506	$queue->[1] *= $fudge;
507	my $transfer = $queue->[0]->guard;
508
509	if ($fudge != 1) {
510	$queue->[1] /= $fudge;
511	$queue->[1] = $queue->[1] * $::wait_factor
512	+ ($::NOW - $self->{time}) * (1 - $::wait_factor);
513	}
514	$self->{time} = $::NOW;
515
516	$self->{fh}->writable or return;
517
518	my ($fh, $buf, $r);
519	my $current = $Coro::current;
520	open $fh, "<", $self->{path}
521	or die "$self->{path}: late open failure ($!)";
522
523	$h -= $l - 1;
524
525	if (0) {
526	if ($l) {
527	sysseek $fh, $l, 0;
528	}
529	}
530
531	while ($h > 0) {
532	if (0) {
533	sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
534	or last;
535	} else {
536	aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
537	$buf, 0, sub {
538	$r = $_[0];
539	Coro::ready($current);
540	});
541	&Coro::schedule;
542	last unless $r;
543	}
544	my $w = syswrite $self->{fh}, $buf
545	or last;
546	$::written += $w;
547	$self->{written} += $w;
548	$l += $r;
549	}
550
551	close $fh;
552	}
553	}
554
555	1;