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;

my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;

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_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} ||= $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};

   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);
      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;
      }

      # 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;

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

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

      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} < 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 = -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) {
         my $delay = 60;
         while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
            if ($delay <= 0) {
               $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
            } else {
               Coro::Event::do_timer(after => 3); $delay -= 3;
            }
         }
      }

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

   close $fh;
}

1;
Revision:	1.29
Committed:	Sat Aug 25 15:14:03 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.28:	+55 -41 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	root	1.29	my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;
89
90	root	1.16	Event->io(fd => Linux::AIO::poll_fileno,
91	root	1.17	poll => 'r', async => 1,
92	root	1.21	cb => \&Linux::AIO::poll_cb);
93	root	1.16
94	root	1.26	our %conn; # $conn{ip}{self} => connobj
95			our %uri; # $uri{ip}{uri}{self}
96	root	1.3	our %blocked;
97	root	1.9	our %mimetype;
98
99			sub read_mimetypes {
100			local *M;
101	root	1.10	if (open M, "<mime_types") {
102	root	1.9	while (<M>) {
103			if (/^([^#]\S+)\t+(\S+)$/) {
104			$mimetype{lc $1} = $2;
105			}
106			}
107			} else {
108	root	1.10	print "cannot open mime_types\n";
109	root	1.9	}
110			}
111	root	1.1
112	root	1.10	read_mimetypes;
113
114	root	1.1	sub new {
115			my $class = shift;
116	root	1.6	my $peername = shift;
117	root	1.1	my $fh = shift;
118	root	1.2	my $self = bless { fh => $fh }, $class;
119	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
120			or $self->err(500, "unable to decode peername");
121	root	1.7
122	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
123	root	1.11	$self->{time} = $::NOW;
124	root	1.2
125			# enter ourselves into various lists
126	root	1.3	weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
127
128	root	1.13	$::conns++;
129
130	root	1.2	$self;
131			}
132
133			sub DESTROY {
134			my $self = shift;
135	root	1.13
136			$::conns--;
137
138	root	1.19	$self->eoconn;
139	root	1.3	delete $conn{$self->{remote_addr}}{$self*1};
140	root	1.19	}
141
142			# end of connection
143			sub eoconn {
144	root	1.26	my $self = shift;
145	root	1.13	delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
146	root	1.1	}
147
148			sub slog {
149	root	1.4	my $self = shift;
150	root	1.29	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
151	root	1.1	}
152
153	root	1.4	sub response {
154	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
155	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
156	root	1.1
157	root	1.28	$self->{h}{connection} \|\|= $hdr->{Connection};
158
159	root	1.4	$res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(
160	root	1.1
161			while (my ($h, $v) = each %$hdr) {
162			$res .= "$h: $v\015\012"
163			}
164	root	1.10	$res .= "\015\012";
165	root	1.4
166	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
167	root	1.1
168	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
169
170			print $accesslog $log if $accesslog;
171			print STDERR $log;
172	root	1.2
173	root	1.11	$self->{written} +=
174			print {$self->{fh}} $res;
175	root	1.1	}
176
177			sub err {
178			my $self = shift;
179			my ($code, $msg, $hdr, $content) = @_;
180
181			unless (defined $content) {
182			$content = "$code $msg";
183			$hdr->{"Content-Type"} = "text/plain";
184			$hdr->{"Content-Length"} = length $content;
185			}
186	root	1.17	$hdr->{"Connection"} = "close";
187	root	1.1
188	root	1.4	$self->response($code, $msg, $hdr, $content);
189	root	1.1
190			die bless {}, err::;
191			}
192
193	root	1.3	sub err_blocked {
194			my $self = shift;
195			my $ip = $self->{remote_addr};
196			my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
197	root	1.10
198	root	1.20	Coro::Event::do_timer(after => 20*rand);
199	root	1.14
200			$self->err(401, "too many connections",
201	root	1.4	{
202			"Content-Type" => "text/html",
203	root	1.20	"Retry-After" => $::BLOCKTIME,
204			"Warning" => "Please do NOT retry, you have been blocked",
205			"WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
206	root	1.28	"Connection" => "close",
207	root	1.4	},
208	root	1.3	<<EOF);
209	root	1.27	<html>
210			<head>
211			<title>Too many connections</title>
212			</head>
213			<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
214
215			<p>You have been blocked because you opened too many connections. You
216	root	1.4	may retry at</p>
217
218			<p><blockquote>$time.</blockquote></p>
219
220			<p>Until then, each new access will renew the block. You might want to have a
221	root	1.28	look at the <a href="http://www.goof.com/pcg/marc/animefaq.html#connectionlimit">FAQ</a>.</p>
222	root	1.27
223			</body></html>
224	root	1.3	EOF
225			}
226
227	root	1.1	sub handle {
228			my $self = shift;
229			my $fh = $self->{fh};
230
231	root	1.29	my $host;
232
233	root	1.17	$fh->timeout($::REQ_TIMEOUT);
234			while() {
235			$self->{reqs}++;
236	root	1.1
237			# read request and parse first line
238			my $req = $fh->readline("\015\012\015\012");
239
240	root	1.17	unless (defined $req) {
241			if (exists $self->{version}) {
242			last;
243			} else {
244			$self->err(408, "request timeout");
245			}
246			}
247
248			$self->{h} = {};
249	root	1.1
250	root	1.17	$fh->timeout($::RES_TIMEOUT);
251	root	1.3	my $ip = $self->{remote_addr};
252
253			if ($blocked{$ip}) {
254			$self->err_blocked($blocked{$ip})
255			if $blocked{$ip} > $::NOW;
256
257			delete $blocked{$ip};
258			}
259
260			if (%{$conn{$ip}} > $::MAX_CONN_IP) {
261	root	1.12	$self->slog(2, "blocked ip $ip");
262	root	1.3	$self->err_blocked;
263			}
264
265	root	1.1	$req =~ /^(?:\015\012)?
266			(GET\|HEAD) \040+
267			([^\040]+) \040+
268			HTTP\/([0-9]+\.[0-9]+)
269			\015\012/gx
270	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
271	root	1.1
272			$self->{method} = $1;
273			$self->{uri} = $2;
274	root	1.17	$self->{version} = $3;
275
276	root	1.20	$3 =~ /^1\./
277	root	1.17	or $self->err(506, "http protocol version $3 not supported");
278	root	1.1
279			# parse headers
280			{
281			my (%hdr, $h, $v);
282
283			$hdr{lc $1} .= ",$2"
284			while $req =~ /\G
285			([^:\000-\040]+):
286			[\008\040]*
287			((?: [^\015\012]+ \| \015\012[\008\040] )*)
288			\015\012
289			/gxc;
290
291			$req =~ /\G\015\012$/
292			or $self->err(400, "bad request");
293
294			$self->{h}{$h} = substr $v, 1
295			while ($h, $v) = each %hdr;
296			}
297
298	root	1.29	# find out server name and port
299			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
300			$host = $1;
301			} else {
302			$host = $self->{h}{host};
303			}
304
305			if (defined $host) {
306			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
307			} else {
308			($self->{server_port}, $host)
309			= unpack_sockaddr_in $self->{fh}->getsockname
310			or $self->err(500, "unable to get socket name");
311			$host = inet_ntoa $host;
312			}
313
314			$self->{server_name} = $host;
315
316			# remote id should be unique per user
317			$self->{remote_id} = $self->{remote_addr};
318
319			if (exists $self->{h}{"client-ip"}) {
320			$self->{remote_id} .= "[".$self->{h}{"client-ip"}."]";
321			} elsif (exists $self->{h}{"x-forwarded-for"}) {
322			$self->{remote_id} .= "[".$self->{h}{"x-forwarded-for"}."]";
323			}
324	root	1.3
325	root	1.13	weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self);
326	root	1.1
327	root	1.24	eval {
328			$self->map_uri;
329			$self->respond;
330			};
331
332	root	1.26	$self->eoconn;
333
334	root	1.24	die if $@ && !ref $@;
335	root	1.17
336	root	1.29	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
337	root	1.17
338			$fh->timeout($::PER_TIMEOUT);
339			}
340	root	1.1	}
341
342			# uri => path mapping
343			sub map_uri {
344			my $self = shift;
345	root	1.29	my $host = $self->{server_name};
346	root	1.1	my $uri = $self->{uri};
347
348			# some massaging, also makes it more secure
349			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
350			$uri =~ s%//+%/%g;
351			$uri =~ s%/\.(?=/\|$)%%g;
352			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
353
354			$uri =~ m%^/?\.\.(?=/\|$)%
355			and $self->err(400, "bad request");
356
357			$self->{name} = $uri;
358
359			# now do the path mapping
360			$self->{path} = "$::DOCROOT/$host$uri";
361	root	1.7
362			$self->access_check;
363	root	1.1	}
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	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
376			$ENV{HTTP_PORT} = $self->{server_port};
377	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
378	root	1.10	exec $path;
379	root	1.1	}
380			Coro::State::_exit(0);
381			} else {
382	root	1.29	die;
383	root	1.1	}
384			}
385
386	root	1.29	sub server_hostport {
387			$_[0]{server_port} == 80
388			? $_[0]{server_name}
389			: "$_[0]{server_name}:$_[0]{server_port}";
390			}
391
392	root	1.1	sub respond {
393			my $self = shift;
394			my $path = $self->{path};
395
396			stat $path
397			or $self->err(404, "not found");
398
399	root	1.10	$self->{stat} = [stat _];
400
401	root	1.1	# idiotic netscape sends idiotic headers AGAIN
402			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
403			? str2time $1 : 0;
404
405			if (-d _ && -r _) {
406			# directory
407			if ($path !~ /\/$/) {
408			# create a redirect to get the trailing "/"
409	root	1.29	# we don't try to avoid the :80
410			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
411	root	1.1	} else {
412	root	1.10	$ims < $self->{stat}[9]
413	root	1.1	or $self->err(304, "not modified");
414
415	root	1.25	if (-r "$path/index.html") {
416			$self->{path} .= "/index.html";
417			$self->handle_file;
418			} else {
419			$self->handle_dir;
420	root	1.1	}
421			}
422			} elsif (-f _ && -r _) {
423			-x _ and $self->err(403, "forbidden");
424			$self->handle_file;
425			} else {
426			$self->err(404, "not found");
427			}
428			}
429
430			sub handle_dir {
431			my $self = shift;
432	root	1.10	my $idx = $self->diridx;
433
434			$self->response(200, "ok",
435			{
436			"Content-Type" => "text/html",
437			"Content-Length" => length $idx,
438			},
439			$idx);
440	root	1.1	}
441
442			sub handle_file {
443			my $self = shift;
444			my $length = -s _;
445			my $hdr = {
446			"Last-Modified" => time2str ((stat _)[9]),
447			};
448
449			my @code = (200, "ok");
450			my ($l, $h);
451
452			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
453			for (split /,/, $1) {
454			if (/^-(\d+)$/) {
455			($l, $h) = ($length - $1, $length - 1);
456			} elsif (/^(\d+)-(\d*)$/) {
457			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
458			} else {
459			($l, $h) = (0, $length - 1);
460			goto ignore;
461			}
462	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
463	root	1.1	}
464			$hdr->{"Content-Range"} = "bytes */$length";
465	root	1.24	$hdr->{"Content-Length"} = $length;
466	root	1.20	$self->slog(9, "not satisfiable($self->{h}{range}\|".$self->{h}{"user-agent"}.")");
467	root	1.24	$self->err(416, "not satisfiable", $hdr, "");
468	root	1.1
469			satisfiable:
470	root	1.4	# check for segmented downloads
471	root	1.10	if ($l && $::NO_SEGMENTED) {
472	root	1.29	my $delay = 60;
473			while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
474			if ($delay <= 0) {
475			$self->err(400, "segmented downloads are not allowed",
476			{ "Content-Type" => "text/html", Connection => "close" }, <<EOF);
477	root	1.28	<html>
478			<head>
479			<title>Segmented downloads are not allowed</title>
480			</head>
481			<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
482
483			<p>Segmented downloads are not allowed on this server. Please refer to the
484			<a href="http://www.goof.com/pcg/marc/animefaq.html#segmented_downloads">FAQ</a>.</p>
485
486			</body></html>
487			EOF
488	root	1.29	} else {
489			Coro::Event::do_timer(after => 3); $delay -= 3;
490			}
491	root	1.4	}
492			}
493
494	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
495			@code = (206, "partial content");
496			$length = $h - $l + 1;
497
498			ignore:
499			} else {
500			($l, $h) = (0, $length - 1);
501			}
502
503	root	1.9	$self->{path} =~ /\.([^.]+)$/;
504			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
505	root	1.1	$hdr->{"Content-Length"} = $length;
506
507	root	1.4	$self->response(@code, $hdr, "");
508	root	1.1
509			if ($self->{method} eq "GET") {
510	root	1.16	my ($fh, $buf, $r);
511			my $current = $Coro::current;
512	root	1.1	open $fh, "<", $self->{path}
513			or die "$self->{path}: late open failure ($!)";
514
515			$h -= $l - 1;
516
517	root	1.19	if (0) {
518			if ($l) {
519			sysseek $fh, $l, 0;
520			}
521			}
522
523	root	1.1	while ($h > 0) {
524	root	1.19	if (0) {
525			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
526			or last;
527			} else {
528	root	1.29	undef $buf;
529			$aio_requests->down;
530	root	1.19	aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
531			$buf, 0, sub {
532			$r = $_[0];
533			$current->ready;
534			});
535			&Coro::schedule;
536	root	1.29	$aio_requests->up;
537	root	1.19	last unless $r;
538			}
539	root	1.11	my $w = $self->{fh}->syswrite($buf)
540	root	1.1	or last;
541	root	1.11	$::written += $w;
542			$self->{written} += $w;
543	root	1.16	$l += $r;
544	root	1.1	}
545			}
546
547			close $fh;
548	root	1.7	}
549
550	root	1.2	1;