Coro/myhttpd/httpd.pl

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

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", @_;
}

my $connections = new Coro::Semaphore $MAX_CONNECTS;

my @newcons;
my @pool;

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

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

push @listen_sockets, $http_port;

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

   }
};

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 $peername = shift;
   my $fh = 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;

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

   $::conns++;

   $self;
}

sub DESTROY {
   my $self = shift;

   $::conns--;

   $self->eoconn;
   delete $conn{$self->{remote_addr}}{$self*1};
}

# end of connection
sub eoconn {
   my $self = shift;
   delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
}

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

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

   #$res .= "Connection: close\015\012";
   $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(

   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";
      $hdr->{"Content-Type"} = "text/plain";
      $hdr->{"Content-Length"} = length $content;
   }
   $hdr->{"Connection"} = "close";

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

   die bless {}, err::;
}

sub err_blocked {
   my $self = shift;
   my $ip = $self->{remote_addr};
   my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;

   Coro::Event::do_timer(after => 20*rand);

   $self->err(401, "too many connections",
              {
                 "Content-Type" => "text/html",
                 "Retry-After" => $::BLOCKTIME,
                 "Warning" => "Please do NOT retry, you have been blocked",
                 "WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
              },
              <<EOF);
<html>
<head>
<title>Too many connections</title>
</head>
<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">

<p>You have been blocked because you opened too many connections. You
may retry at</p>

   <p><blockquote>$time.</blockquote></p>
   
<p>Until then, each new access will renew the block. You might want to have a
look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>

</body></html>
EOF
}

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

   $fh->timeout($::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);
      my $ip = $self->{remote_addr};

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

         delete $blocked{$ip};
      }

      if (%{$conn{$ip}} > $::MAX_CONN_IP) {
         $self->slog(2, "blocked ip $ip");
         $self->err_blocked;
      }

      $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;
      }

      $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;

      weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self);

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

      $self->eoconn;

      die if $@ && !ref $@;

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

      $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
      $fh->timeout($::PER_TIMEOUT);
   }
}

# uri => path mapping
sub map_uri {
   my $self = shift;
   my $host = $self->{h}{host} || "default";
   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 server_address {
   my $self = shift;
   my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
      or $self->err(500, "unable to get socket name");
   ((inet_ntoa $iaddr), $port);
}

sub server_host {
   my $self = shift;
   if (exists $self->{h}{host}) {
      return $self->{h}{host};
   } else {
      return (($self->server_address)[0]);
   }
}

sub server_hostport {
   my $self = shift;
   my ($host, $port);
   if (exists $self->{h}{host}) {
      ($host, $port) = ($self->{h}{host}, $self->{server_port});
   } else {
      ($host, $port) = $self->server_address;
   }
   $port = $port == 80 ? "" : ":$port";
   $host.$port;
}

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_host;
         $ENV{HTTP_PORT}       = $self->{server_host};
         $ENV{SCRIPT_NAME}     = $self->{name};
         exec $path;
      }
      Coro::State::_exit(0);
   } else {
   }
}

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 "/"
         my $host = $self->server_hostport;
         $self->err(301, "moved permanently", { Location =>  "http://$host$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 = -s _;
   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;
      $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
      $self->err(416, "not satisfiable", $hdr, "");

satisfiable:
      # check for segmented downloads
      if ($l && $::NO_SEGMENTED) {
         if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
            $self->err(400, "segmented downloads are not allowed");
         }
      }

      $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 ($self->{method} eq "GET") {
      my ($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];
                        $current->ready;
                     });
            &Coro::schedule;
            last unless $r;
         }
         my $w = $self->{fh}->syswrite($buf)
            or last;
         $::written += $w;
         $self->{written} += $w;
         $l += $r;
      }
   }

   close $fh;
}

1;
Revision:	1.27
Committed:	Sun Aug 19 23:57:52 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.26:	+23 -5 lines
Log Message:	* empty log message *
#	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	root	1.27
15			our $accesslog;
16
17			if ($ACCESS_LOG) {
18			use IO::Handle;
19			open $accesslog, ">>$ACCESS_LOG"
20			or die "$ACCESS_LOG: $!";
21			$accesslog->autoflush(1);
22			}
23
24	root	1.1	sub slog {
25			my $level = shift;
26			my $format = shift;
27			printf "---: $format\n", @_;
28			}
29
30			my $connections = new Coro::Semaphore $MAX_CONNECTS;
31
32	root	1.6	my @newcons;
33	root	1.1	my @pool;
34
35	root	1.2	# one "execution thread"
36	root	1.1	sub handler {
37			while () {
38	root	1.6	my $new = pop @newcons;
39			if ($new) {
40	root	1.1	eval {
41	root	1.6	conn->new(@$new)->handle;
42	root	1.1	};
43			slog 1, "$@" if $@ && !ref $@;
44			$connections->up;
45			} else {
46			last if @pool >= $MAX_POOL;
47			push @pool, $Coro::current;
48			schedule;
49			}
50			}
51			}
52
53	root	1.4	my $http_port = new Coro::Socket
54			LocalAddr => $SERVER_HOST,
55			LocalPort => $SERVER_PORT,
56			ReuseAddr => 1,
57	root	1.13	Listen => 50,
58	root	1.4	or die "unable to start server";
59
60			push @listen_sockets, $http_port;
61
62	root	1.2	# the "main thread"
63	root	1.1	async {
64			slog 1, "accepting connections";
65			while () {
66			$connections->down;
67	root	1.6	push @newcons, [$http_port->accept];
68	root	1.1	#slog 3, "accepted @$connections ".scalar(@pool);
69	root	1.3	$::NOW = time;
70	root	1.1	if (@pool) {
71			(pop @pool)->ready;
72			} else {
73			async \&handler;
74			}
75
76			}
77			};
78
79			package conn;
80
81			use Socket;
82			use HTTP::Date;
83	root	1.2	use Convert::Scalar 'weaken';
84	root	1.16	use Linux::AIO;
85
86			Linux::AIO::min_parallel $::AIO_PARALLEL;
87
88			Event->io(fd => Linux::AIO::poll_fileno,
89	root	1.17	poll => 'r', async => 1,
90	root	1.21	cb => \&Linux::AIO::poll_cb);
91	root	1.16
92	root	1.26	our %conn; # $conn{ip}{self} => connobj
93			our %uri; # $uri{ip}{uri}{self}
94	root	1.3	our %blocked;
95	root	1.9	our %mimetype;
96
97			sub read_mimetypes {
98			local *M;
99	root	1.10	if (open M, "<mime_types") {
100	root	1.9	while (<M>) {
101			if (/^([^#]\S+)\t+(\S+)$/) {
102			$mimetype{lc $1} = $2;
103			}
104			}
105			} else {
106	root	1.10	print "cannot open mime_types\n";
107	root	1.9	}
108			}
109	root	1.1
110	root	1.10	read_mimetypes;
111
112	root	1.1	sub new {
113			my $class = shift;
114	root	1.6	my $peername = shift;
115	root	1.1	my $fh = shift;
116	root	1.2	my $self = bless { fh => $fh }, $class;
117	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
118			or $self->err(500, "unable to decode peername");
119	root	1.7
120	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
121	root	1.11	$self->{time} = $::NOW;
122	root	1.2
123			# enter ourselves into various lists
124	root	1.3	weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126	root	1.13	$::conns++;
127
128	root	1.2	$self;
129			}
130
131			sub DESTROY {
132			my $self = shift;
133	root	1.13
134			$::conns--;
135
136	root	1.19	$self->eoconn;
137	root	1.3	delete $conn{$self->{remote_addr}}{$self*1};
138	root	1.19	}
139
140			# end of connection
141			sub eoconn {
142	root	1.26	my $self = shift;
143	root	1.13	delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
144	root	1.1	}
145
146			sub slog {
147	root	1.4	my $self = shift;
148			main::slog($_[0], "$self->{remote_addr}> $_[1]");
149	root	1.1	}
150
151	root	1.4	sub response {
152	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
153	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
154	root	1.1
155	root	1.17	#$res .= "Connection: close\015\012";
156	root	1.4	$res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(
157	root	1.1
158			while (my ($h, $v) = each %$hdr) {
159			$res .= "$h: $v\015\012"
160			}
161	root	1.10	$res .= "\015\012";
162	root	1.4
163	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
164	root	1.1
165	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
166
167			print $accesslog $log if $accesslog;
168			print STDERR $log;
169	root	1.2
170	root	1.11	$self->{written} +=
171			print {$self->{fh}} $res;
172	root	1.1	}
173
174			sub err {
175			my $self = shift;
176			my ($code, $msg, $hdr, $content) = @_;
177
178			unless (defined $content) {
179			$content = "$code $msg";
180			$hdr->{"Content-Type"} = "text/plain";
181			$hdr->{"Content-Length"} = length $content;
182			}
183	root	1.17	$hdr->{"Connection"} = "close";
184	root	1.1
185	root	1.4	$self->response($code, $msg, $hdr, $content);
186	root	1.1
187			die bless {}, err::;
188			}
189
190	root	1.3	sub err_blocked {
191			my $self = shift;
192			my $ip = $self->{remote_addr};
193			my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
194	root	1.10
195	root	1.20	Coro::Event::do_timer(after => 20*rand);
196	root	1.14
197			$self->err(401, "too many connections",
198	root	1.4	{
199			"Content-Type" => "text/html",
200	root	1.20	"Retry-After" => $::BLOCKTIME,
201			"Warning" => "Please do NOT retry, you have been blocked",
202			"WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
203	root	1.4	},
204	root	1.3	<<EOF);
205	root	1.27	<html>
206			<head>
207			<title>Too many connections</title>
208			</head>
209			<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
210
211			<p>You have been blocked because you opened too many connections. You
212	root	1.4	may retry at</p>
213
214			<p><blockquote>$time.</blockquote></p>
215
216			<p>Until then, each new access will renew the block. You might want to have a
217			look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
218	root	1.27
219			</body></html>
220	root	1.3	EOF
221			}
222
223	root	1.1	sub handle {
224			my $self = shift;
225			my $fh = $self->{fh};
226
227	root	1.17	$fh->timeout($::REQ_TIMEOUT);
228			while() {
229			$self->{reqs}++;
230	root	1.1
231			# read request and parse first line
232			my $req = $fh->readline("\015\012\015\012");
233
234	root	1.17	unless (defined $req) {
235			if (exists $self->{version}) {
236			last;
237			} else {
238			$self->err(408, "request timeout");
239			}
240			}
241
242			$self->{h} = {};
243	root	1.1
244	root	1.17	$fh->timeout($::RES_TIMEOUT);
245	root	1.3	my $ip = $self->{remote_addr};
246
247			if ($blocked{$ip}) {
248			$self->err_blocked($blocked{$ip})
249			if $blocked{$ip} > $::NOW;
250
251			delete $blocked{$ip};
252			}
253
254			if (%{$conn{$ip}} > $::MAX_CONN_IP) {
255	root	1.12	$self->slog(2, "blocked ip $ip");
256	root	1.3	$self->err_blocked;
257			}
258
259	root	1.1	$req =~ /^(?:\015\012)?
260			(GET\|HEAD) \040+
261			([^\040]+) \040+
262			HTTP\/([0-9]+\.[0-9]+)
263			\015\012/gx
264	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
265	root	1.1
266			$self->{method} = $1;
267			$self->{uri} = $2;
268	root	1.17	$self->{version} = $3;
269
270	root	1.20	$3 =~ /^1\./
271	root	1.17	or $self->err(506, "http protocol version $3 not supported");
272	root	1.1
273			# parse headers
274			{
275			my (%hdr, $h, $v);
276
277			$hdr{lc $1} .= ",$2"
278			while $req =~ /\G
279			([^:\000-\040]+):
280			[\008\040]*
281			((?: [^\015\012]+ \| \015\012[\008\040] )*)
282			\015\012
283			/gxc;
284
285			$req =~ /\G\015\012$/
286			or $self->err(400, "bad request");
287
288			$self->{h}{$h} = substr $v, 1
289			while ($h, $v) = each %hdr;
290			}
291
292			$self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;
293	root	1.3
294	root	1.13	weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self);
295	root	1.1
296	root	1.24	eval {
297			$self->map_uri;
298			$self->respond;
299			};
300
301	root	1.26	$self->eoconn;
302
303	root	1.24	die if $@ && !ref $@;
304	root	1.17
305			last if $self->{h}{connection} =~ /close/ \|\| $self->{version} lt "1.1";
306
307	root	1.19	$self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
308	root	1.17	$fh->timeout($::PER_TIMEOUT);
309			}
310	root	1.1	}
311
312			# uri => path mapping
313			sub map_uri {
314			my $self = shift;
315			my $host = $self->{h}{host} \|\| "default";
316			my $uri = $self->{uri};
317
318			# some massaging, also makes it more secure
319			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
320			$uri =~ s%//+%/%g;
321			$uri =~ s%/\.(?=/\|$)%%g;
322			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
323
324			$uri =~ m%^/?\.\.(?=/\|$)%
325			and $self->err(400, "bad request");
326
327			$self->{name} = $uri;
328
329			# now do the path mapping
330			$self->{path} = "$::DOCROOT/$host$uri";
331	root	1.7
332			$self->access_check;
333	root	1.1	}
334
335			sub server_address {
336			my $self = shift;
337			my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
338			or $self->err(500, "unable to get socket name");
339			((inet_ntoa $iaddr), $port);
340			}
341
342			sub server_host {
343			my $self = shift;
344			if (exists $self->{h}{host}) {
345			return $self->{h}{host};
346			} else {
347			return (($self->server_address)[0]);
348			}
349			}
350
351			sub server_hostport {
352			my $self = shift;
353			my ($host, $port);
354			if (exists $self->{h}{host}) {
355			($host, $port) = ($self->{h}{host}, $self->{server_port});
356			} else {
357			($host, $port) = $self->server_address;
358			}
359			$port = $port == 80 ? "" : ":$port";
360			$host.$port;
361			}
362
363			sub _cgi {
364			my $self = shift;
365			my $path = shift;
366			my $fh;
367
368			# no two-way xxx supported
369			if (0 == fork) {
370			open STDOUT, ">&".fileno($self->{fh});
371			if (chdir $::DOCROOT) {
372			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
373			$ENV{HTTP_HOST} = $self->server_host;
374			$ENV{HTTP_PORT} = $self->{server_host};
375			$ENV{SCRIPT_NAME} = $self->{name};
376	root	1.10	exec $path;
377	root	1.1	}
378			Coro::State::_exit(0);
379			} else {
380			}
381			}
382
383			sub respond {
384			my $self = shift;
385			my $path = $self->{path};
386
387			stat $path
388			or $self->err(404, "not found");
389
390	root	1.10	$self->{stat} = [stat _];
391
392	root	1.1	# idiotic netscape sends idiotic headers AGAIN
393			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
394			? str2time $1 : 0;
395
396			if (-d _ && -r _) {
397			# directory
398			if ($path !~ /\/$/) {
399			# create a redirect to get the trailing "/"
400			my $host = $self->server_hostport;
401			$self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" });
402			} else {
403	root	1.10	$ims < $self->{stat}[9]
404	root	1.1	or $self->err(304, "not modified");
405
406	root	1.25	if (-r "$path/index.html") {
407			$self->{path} .= "/index.html";
408			$self->handle_file;
409			} else {
410			$self->handle_dir;
411	root	1.1	}
412			}
413			} elsif (-f _ && -r _) {
414			-x _ and $self->err(403, "forbidden");
415			$self->handle_file;
416			} else {
417			$self->err(404, "not found");
418			}
419			}
420
421			sub handle_dir {
422			my $self = shift;
423	root	1.10	my $idx = $self->diridx;
424
425			$self->response(200, "ok",
426			{
427			"Content-Type" => "text/html",
428			"Content-Length" => length $idx,
429			},
430			$idx);
431	root	1.1	}
432
433			sub handle_file {
434			my $self = shift;
435			my $length = -s _;
436			my $hdr = {
437			"Last-Modified" => time2str ((stat _)[9]),
438			};
439
440			my @code = (200, "ok");
441			my ($l, $h);
442
443			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
444			for (split /,/, $1) {
445			if (/^-(\d+)$/) {
446			($l, $h) = ($length - $1, $length - 1);
447			} elsif (/^(\d+)-(\d*)$/) {
448			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
449			} else {
450			($l, $h) = (0, $length - 1);
451			goto ignore;
452			}
453	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
454	root	1.1	}
455			$hdr->{"Content-Range"} = "bytes */$length";
456	root	1.24	$hdr->{"Content-Length"} = $length;
457	root	1.20	$self->slog(9, "not satisfiable($self->{h}{range}\|".$self->{h}{"user-agent"}.")");
458	root	1.24	$self->err(416, "not satisfiable", $hdr, "");
459	root	1.1
460			satisfiable:
461	root	1.4	# check for segmented downloads
462	root	1.10	if ($l && $::NO_SEGMENTED) {
463	root	1.13	if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
464	root	1.4	$self->err(400, "segmented downloads are not allowed");
465			}
466			}
467
468	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
469			@code = (206, "partial content");
470			$length = $h - $l + 1;
471
472			ignore:
473			} else {
474			($l, $h) = (0, $length - 1);
475			}
476
477	root	1.9	$self->{path} =~ /\.([^.]+)$/;
478			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
479	root	1.1	$hdr->{"Content-Length"} = $length;
480
481	root	1.4	$self->response(@code, $hdr, "");
482	root	1.1
483			if ($self->{method} eq "GET") {
484	root	1.16	my ($fh, $buf, $r);
485			my $current = $Coro::current;
486	root	1.1	open $fh, "<", $self->{path}
487			or die "$self->{path}: late open failure ($!)";
488
489			$h -= $l - 1;
490
491	root	1.19	if (0) {
492			if ($l) {
493			sysseek $fh, $l, 0;
494			}
495			}
496
497	root	1.1	while ($h > 0) {
498	root	1.19	if (0) {
499			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
500			or last;
501			} else {
502			aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
503			$buf, 0, sub {
504			$r = $_[0];
505			$current->ready;
506			});
507			&Coro::schedule;
508			last unless $r;
509			}
510	root	1.11	my $w = $self->{fh}->syswrite($buf)
511	root	1.1	or last;
512	root	1.11	$::written += $w;
513			$self->{written} += $w;
514	root	1.16	$l += $r;
515	root	1.1	}
516			}
517
518			close $fh;
519	root	1.7	}
520
521	root	1.2	1;