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";

   $self->{h}{connection} ||= $hdr->{Connection};

   $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\"",
                 "Connection" => "close",
              },
              <<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#connectionlimit">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",
                       { "Content-Type" => "text/html", Connection => "close" }, <<EOF);
<html>
<head>
<title>Segmented downloads are not allowed</title>
</head>
<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">

<p>Segmented downloads are not allowed on this server. Please refer to the
<a href="http://www.goof.com/pcg/marc/animefaq.html#segmented_downloads">FAQ</a>.</p>

</body></html>
EOF
EOF
         }
      }

      $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:	1.28
Committed:	Mon Aug 20 16:58:19 2001 UTC (22 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.27:	+18 -3 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	1.28	$self->{h}{connection} \|\|= $hdr->{Connection};
156
157	root	1.4	$res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(
158	root	1.1
159			while (my ($h, $v) = each %$hdr) {
160			$res .= "$h: $v\015\012"
161			}
162	root	1.10	$res .= "\015\012";
163	root	1.4
164	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
165	root	1.1
166	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
167
168			print $accesslog $log if $accesslog;
169			print STDERR $log;
170	root	1.2
171	root	1.11	$self->{written} +=
172			print {$self->{fh}} $res;
173	root	1.1	}
174
175			sub err {
176			my $self = shift;
177			my ($code, $msg, $hdr, $content) = @_;
178
179			unless (defined $content) {
180			$content = "$code $msg";
181			$hdr->{"Content-Type"} = "text/plain";
182			$hdr->{"Content-Length"} = length $content;
183			}
184	root	1.17	$hdr->{"Connection"} = "close";
185	root	1.1
186	root	1.4	$self->response($code, $msg, $hdr, $content);
187	root	1.1
188			die bless {}, err::;
189			}
190
191	root	1.3	sub err_blocked {
192			my $self = shift;
193			my $ip = $self->{remote_addr};
194			my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
195	root	1.10
196	root	1.20	Coro::Event::do_timer(after => 20*rand);
197	root	1.14
198			$self->err(401, "too many connections",
199	root	1.4	{
200			"Content-Type" => "text/html",
201	root	1.20	"Retry-After" => $::BLOCKTIME,
202			"Warning" => "Please do NOT retry, you have been blocked",
203			"WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
204	root	1.28	"Connection" => "close",
205	root	1.4	},
206	root	1.3	<<EOF);
207	root	1.27	<html>
208			<head>
209			<title>Too many connections</title>
210			</head>
211			<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
212
213			<p>You have been blocked because you opened too many connections. You
214	root	1.4	may retry at</p>
215
216			<p><blockquote>$time.</blockquote></p>
217
218			<p>Until then, each new access will renew the block. You might want to have a
219	root	1.28	look at the <a href="http://www.goof.com/pcg/marc/animefaq.html#connectionlimit">FAQ</a>.</p>
220	root	1.27
221			</body></html>
222	root	1.3	EOF
223			}
224
225	root	1.1	sub handle {
226			my $self = shift;
227			my $fh = $self->{fh};
228
229	root	1.17	$fh->timeout($::REQ_TIMEOUT);
230			while() {
231			$self->{reqs}++;
232	root	1.1
233			# read request and parse first line
234			my $req = $fh->readline("\015\012\015\012");
235
236	root	1.17	unless (defined $req) {
237			if (exists $self->{version}) {
238			last;
239			} else {
240			$self->err(408, "request timeout");
241			}
242			}
243
244			$self->{h} = {};
245	root	1.1
246	root	1.17	$fh->timeout($::RES_TIMEOUT);
247	root	1.3	my $ip = $self->{remote_addr};
248
249			if ($blocked{$ip}) {
250			$self->err_blocked($blocked{$ip})
251			if $blocked{$ip} > $::NOW;
252
253			delete $blocked{$ip};
254			}
255
256			if (%{$conn{$ip}} > $::MAX_CONN_IP) {
257	root	1.12	$self->slog(2, "blocked ip $ip");
258	root	1.3	$self->err_blocked;
259			}
260
261	root	1.1	$req =~ /^(?:\015\012)?
262			(GET\|HEAD) \040+
263			([^\040]+) \040+
264			HTTP\/([0-9]+\.[0-9]+)
265			\015\012/gx
266	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
267	root	1.1
268			$self->{method} = $1;
269			$self->{uri} = $2;
270	root	1.17	$self->{version} = $3;
271
272	root	1.20	$3 =~ /^1\./
273	root	1.17	or $self->err(506, "http protocol version $3 not supported");
274	root	1.1
275			# parse headers
276			{
277			my (%hdr, $h, $v);
278
279			$hdr{lc $1} .= ",$2"
280			while $req =~ /\G
281			([^:\000-\040]+):
282			[\008\040]*
283			((?: [^\015\012]+ \| \015\012[\008\040] )*)
284			\015\012
285			/gxc;
286
287			$req =~ /\G\015\012$/
288			or $self->err(400, "bad request");
289
290			$self->{h}{$h} = substr $v, 1
291			while ($h, $v) = each %hdr;
292			}
293
294			$self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;
295	root	1.3
296	root	1.13	weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self);
297	root	1.1
298	root	1.24	eval {
299			$self->map_uri;
300			$self->respond;
301			};
302
303	root	1.26	$self->eoconn;
304
305	root	1.24	die if $@ && !ref $@;
306	root	1.17
307			last if $self->{h}{connection} =~ /close/ \|\| $self->{version} lt "1.1";
308
309	root	1.19	$self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
310	root	1.17	$fh->timeout($::PER_TIMEOUT);
311			}
312	root	1.1	}
313
314			# uri => path mapping
315			sub map_uri {
316			my $self = shift;
317			my $host = $self->{h}{host} \|\| "default";
318			my $uri = $self->{uri};
319
320			# some massaging, also makes it more secure
321			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
322			$uri =~ s%//+%/%g;
323			$uri =~ s%/\.(?=/\|$)%%g;
324			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
325
326			$uri =~ m%^/?\.\.(?=/\|$)%
327			and $self->err(400, "bad request");
328
329			$self->{name} = $uri;
330
331			# now do the path mapping
332			$self->{path} = "$::DOCROOT/$host$uri";
333	root	1.7
334			$self->access_check;
335	root	1.1	}
336
337			sub server_address {
338			my $self = shift;
339			my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
340			or $self->err(500, "unable to get socket name");
341			((inet_ntoa $iaddr), $port);
342			}
343
344			sub server_host {
345			my $self = shift;
346			if (exists $self->{h}{host}) {
347			return $self->{h}{host};
348			} else {
349			return (($self->server_address)[0]);
350			}
351			}
352
353			sub server_hostport {
354			my $self = shift;
355			my ($host, $port);
356			if (exists $self->{h}{host}) {
357			($host, $port) = ($self->{h}{host}, $self->{server_port});
358			} else {
359			($host, $port) = $self->server_address;
360			}
361			$port = $port == 80 ? "" : ":$port";
362			$host.$port;
363			}
364
365			sub _cgi {
366			my $self = shift;
367			my $path = shift;
368			my $fh;
369
370			# no two-way xxx supported
371			if (0 == fork) {
372			open STDOUT, ">&".fileno($self->{fh});
373			if (chdir $::DOCROOT) {
374			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
375			$ENV{HTTP_HOST} = $self->server_host;
376			$ENV{HTTP_PORT} = $self->{server_host};
377			$ENV{SCRIPT_NAME} = $self->{name};
378	root	1.10	exec $path;
379	root	1.1	}
380			Coro::State::_exit(0);
381			} else {
382			}
383			}
384
385			sub respond {
386			my $self = shift;
387			my $path = $self->{path};
388
389			stat $path
390			or $self->err(404, "not found");
391
392	root	1.10	$self->{stat} = [stat _];
393
394	root	1.1	# idiotic netscape sends idiotic headers AGAIN
395			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
396			? str2time $1 : 0;
397
398			if (-d _ && -r _) {
399			# directory
400			if ($path !~ /\/$/) {
401			# create a redirect to get the trailing "/"
402			my $host = $self->server_hostport;
403			$self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" });
404			} else {
405	root	1.10	$ims < $self->{stat}[9]
406	root	1.1	or $self->err(304, "not modified");
407
408	root	1.25	if (-r "$path/index.html") {
409			$self->{path} .= "/index.html";
410			$self->handle_file;
411			} else {
412			$self->handle_dir;
413	root	1.1	}
414			}
415			} elsif (-f _ && -r _) {
416			-x _ and $self->err(403, "forbidden");
417			$self->handle_file;
418			} else {
419			$self->err(404, "not found");
420			}
421			}
422
423			sub handle_dir {
424			my $self = shift;
425	root	1.10	my $idx = $self->diridx;
426
427			$self->response(200, "ok",
428			{
429			"Content-Type" => "text/html",
430			"Content-Length" => length $idx,
431			},
432			$idx);
433	root	1.1	}
434
435			sub handle_file {
436			my $self = shift;
437			my $length = -s _;
438			my $hdr = {
439			"Last-Modified" => time2str ((stat _)[9]),
440			};
441
442			my @code = (200, "ok");
443			my ($l, $h);
444
445			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
446			for (split /,/, $1) {
447			if (/^-(\d+)$/) {
448			($l, $h) = ($length - $1, $length - 1);
449			} elsif (/^(\d+)-(\d*)$/) {
450			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
451			} else {
452			($l, $h) = (0, $length - 1);
453			goto ignore;
454			}
455	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
456	root	1.1	}
457			$hdr->{"Content-Range"} = "bytes */$length";
458	root	1.24	$hdr->{"Content-Length"} = $length;
459	root	1.20	$self->slog(9, "not satisfiable($self->{h}{range}\|".$self->{h}{"user-agent"}.")");
460	root	1.24	$self->err(416, "not satisfiable", $hdr, "");
461	root	1.1
462			satisfiable:
463	root	1.4	# check for segmented downloads
464	root	1.10	if ($l && $::NO_SEGMENTED) {
465	root	1.13	if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
466	root	1.28	$self->err(400, "segmented downloads are not allowed",
467			{ "Content-Type" => "text/html", Connection => "close" }, <<EOF);
468			<html>
469			<head>
470			<title>Segmented downloads are not allowed</title>
471			</head>
472			<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
473
474			<p>Segmented downloads are not allowed on this server. Please refer to the
475			<a href="http://www.goof.com/pcg/marc/animefaq.html#segmented_downloads">FAQ</a>.</p>
476
477			</body></html>
478			EOF
479			EOF
480	root	1.4	}
481			}
482
483	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
484			@code = (206, "partial content");
485			$length = $h - $l + 1;
486
487			ignore:
488			} else {
489			($l, $h) = (0, $length - 1);
490			}
491
492	root	1.9	$self->{path} =~ /\.([^.]+)$/;
493			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
494	root	1.1	$hdr->{"Content-Length"} = $length;
495
496	root	1.4	$self->response(@code, $hdr, "");
497	root	1.1
498			if ($self->{method} eq "GET") {
499	root	1.16	my ($fh, $buf, $r);
500			my $current = $Coro::current;
501	root	1.1	open $fh, "<", $self->{path}
502			or die "$self->{path}: late open failure ($!)";
503
504			$h -= $l - 1;
505
506	root	1.19	if (0) {
507			if ($l) {
508			sysseek $fh, $l, 0;
509			}
510			}
511
512	root	1.1	while ($h > 0) {
513	root	1.19	if (0) {
514			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
515			or last;
516			} else {
517			aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
518			$buf, 0, sub {
519			$r = $_[0];
520			$current->ready;
521			});
522			&Coro::schedule;
523			last unless $r;
524			}
525	root	1.11	my $w = $self->{fh}->syswrite($buf)
526	root	1.1	or last;
527	root	1.11	$::written += $w;
528			$self->{written} += $w;
529	root	1.16	$l += $r;
530	root	1.1	}
531			}
532
533			close $fh;
534	root	1.7	}
535
536	root	1.2	1;