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}->sockname
               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:	1.43
Committed:	Wed Sep 12 20:29:43 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.42:	+1 -1 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	root	1.32	use HTTP::Date;
7
8	root	1.1	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	root	1.27
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	root	1.1	sub slog {
27			my $level = shift;
28			my $format = shift;
29			printf "---: $format\n", @_;
30			}
31
32	root	1.32	our $connections = new Coro::Semaphore $MAX_CONNECTS \|\| 250;
33	root	1.34
34			our $wait_factor = 0.95;
35
36			our @transfers = (
37	root	1.35	[(new Coro::Semaphore $MAX_TRANSFERS_SMALL \|\| 50), 1],
38			[(new Coro::Semaphore $MAX_TRANSFERS_LARGE \|\| 50), 1],
39	root	1.34	);
40	root	1.1
41	root	1.6	my @newcons;
42	root	1.1	my @pool;
43
44	root	1.2	# one "execution thread"
45	root	1.1	sub handler {
46			while () {
47	root	1.38	if (@newcons) {
48	root	1.1	eval {
49	root	1.38	conn->new(@{pop @newcons})->handle;
50	root	1.1	};
51			slog 1, "$@" 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	root	1.40	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	root	1.4	my $http_port = new Coro::Socket
84			LocalAddr => $SERVER_HOST,
85			LocalPort => $SERVER_PORT,
86			ReuseAddr => 1,
87	root	1.13	Listen => 50,
88	root	1.4	or die "unable to start server";
89
90	root	1.40	listen_on $http_port;
91
92	root	1.41	if ($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	root	1.40
100	root	1.41	listen_on $http_port;
101			}
102	root	1.4
103	root	1.32	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	root	1.34	})->now;
110	root	1.1
111			package conn;
112
113			use Socket;
114			use HTTP::Date;
115	root	1.2	use Convert::Scalar 'weaken';
116	root	1.16	use Linux::AIO;
117
118			Linux::AIO::min_parallel $::AIO_PARALLEL;
119
120			Event->io(fd => Linux::AIO::poll_fileno,
121	root	1.17	poll => 'r', async => 1,
122	root	1.21	cb => \&Linux::AIO::poll_cb);
123	root	1.16
124	root	1.26	our %conn; # $conn{ip}{self} => connobj
125			our %uri; # $uri{ip}{uri}{self}
126	root	1.3	our %blocked;
127	root	1.9	our %mimetype;
128
129			sub read_mimetypes {
130			local *M;
131	root	1.10	if (open M, "<mime_types") {
132	root	1.9	while (<M>) {
133			if (/^([^#]\S+)\t+(\S+)$/) {
134			$mimetype{lc $1} = $2;
135			}
136			}
137			} else {
138	root	1.10	print "cannot open mime_types\n";
139	root	1.9	}
140			}
141	root	1.1
142	root	1.10	read_mimetypes;
143
144	root	1.1	sub new {
145			my $class = shift;
146	root	1.42	my $fh = shift;
147	root	1.6	my $peername = shift;
148	root	1.2	my $self = bless { fh => $fh }, $class;
149	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
150			or $self->err(500, "unable to decode peername");
151	root	1.7
152	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
153	root	1.11	$self->{time} = $::NOW;
154	root	1.2
155	root	1.13	$::conns++;
156
157	root	1.2	$self;
158			}
159
160			sub DESTROY {
161			my $self = shift;
162	root	1.13	$::conns--;
163	root	1.19	$self->eoconn;
164			}
165
166			# end of connection
167			sub eoconn {
168	root	1.26	my $self = shift;
169	root	1.36
170			# clean up hints
171			delete $conn{$self->{remote_id}}{$self*1};
172			delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
173	root	1.1	}
174
175			sub slog {
176	root	1.4	my $self = shift;
177	root	1.29	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
178	root	1.1	}
179
180	root	1.4	sub response {
181	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
182	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
183	root	1.1
184	root	1.42	$self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;
185	root	1.28
186	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
187	root	1.1
188			while (my ($h, $v) = each %$hdr) {
189			$res .= "$h: $v\015\012"
190			}
191	root	1.10	$res .= "\015\012";
192	root	1.4
193	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
194	root	1.1
195	root	1.27	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	root	1.2
200	root	1.11	$self->{written} +=
201			print {$self->{fh}} $res;
202	root	1.1	}
203
204			sub err {
205			my $self = shift;
206			my ($code, $msg, $hdr, $content) = @_;
207
208			unless (defined $content) {
209	root	1.35	$content = "$code $msg\n";
210	root	1.1	$hdr->{"Content-Type"} = "text/plain";
211			$hdr->{"Content-Length"} = length $content;
212			}
213	root	1.17	$hdr->{"Connection"} = "close";
214	root	1.1
215	root	1.4	$self->response($code, $msg, $hdr, $content);
216	root	1.1
217			die bless {}, err::;
218			}
219
220			sub handle {
221			my $self = shift;
222			my $fh = $self->{fh};
223
224	root	1.29	my $host;
225
226	root	1.17	$fh->timeout($::REQ_TIMEOUT);
227			while() {
228			$self->{reqs}++;
229	root	1.1
230			# read request and parse first line
231			my $req = $fh->readline("\015\012\015\012");
232
233	root	1.17	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	root	1.1
243	root	1.17	$fh->timeout($::RES_TIMEOUT);
244	root	1.3
245	root	1.1	$req =~ /^(?:\015\012)?
246			(GET\|HEAD) \040+
247			([^\040]+) \040+
248			HTTP\/([0-9]+\.[0-9]+)
249			\015\012/gx
250	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
251	root	1.1
252			$self->{method} = $1;
253			$self->{uri} = $2;
254	root	1.17	$self->{version} = $3;
255
256	root	1.20	$3 =~ /^1\./
257	root	1.17	or $self->err(506, "http protocol version $3 not supported");
258	root	1.1
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	root	1.36	# 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); $delay -= 4;
304			}
305			}
306			}
307
308	root	1.29	# find out server name and port
309			if ($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	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
320	root	1.29	or $self->err(500, "unable to get socket name");
321			$host = inet_ntoa $host;
322			}
323
324			$self->{server_name} = $host;
325
326	root	1.36	# enter ourselves into various lists
327			weaken ($conn{$id}{$self*1} = $self);
328			weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
329	root	1.1
330	root	1.24	eval {
331			$self->map_uri;
332			$self->respond;
333			};
334
335	root	1.26	$self->eoconn;
336
337	root	1.24	die if $@ && !ref $@;
338	root	1.17
339	root	1.29	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
340	root	1.17
341			$fh->timeout($::PER_TIMEOUT);
342			}
343	root	1.1	}
344
345			# uri => path mapping
346			sub map_uri {
347			my $self = shift;
348	root	1.29	my $host = $self->{server_name};
349	root	1.1	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	root	1.7
365			$self->access_check;
366	root	1.1	}
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	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
379			$ENV{HTTP_PORT} = $self->{server_port};
380	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
381	root	1.10	exec $path;
382	root	1.1	}
383			Coro::State::_exit(0);
384			} else {
385	root	1.29	die;
386	root	1.1	}
387			}
388
389	root	1.29	sub server_hostport {
390			$_[0]{server_port} == 80
391			? $_[0]{server_name}
392			: "$_[0]{server_name}:$_[0]{server_port}";
393			}
394
395	root	1.1	sub respond {
396			my $self = shift;
397			my $path = $self->{path};
398
399			stat $path
400			or $self->err(404, "not found");
401
402	root	1.10	$self->{stat} = [stat _];
403
404	root	1.1	# 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	root	1.29	# we don't try to avoid the :80
413			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
414	root	1.1	} else {
415	root	1.10	$ims < $self->{stat}[9]
416	root	1.1	or $self->err(304, "not modified");
417
418	root	1.25	if (-r "$path/index.html") {
419			$self->{path} .= "/index.html";
420			$self->handle_file;
421			} else {
422			$self->handle_dir;
423	root	1.1	}
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	root	1.10	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	root	1.1	}
444
445			sub handle_file {
446			my $self = shift;
447	root	1.34	my $length = $self->{stat}[7];
448			my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
449	root	1.1	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	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
467	root	1.1	}
468			$hdr->{"Content-Range"} = "bytes */$length";
469	root	1.24	$hdr->{"Content-Length"} = $length;
470			$self->err(416, "not satisfiable", $hdr, "");
471	root	1.1
472			satisfiable:
473	root	1.4	# check for segmented downloads
474	root	1.10	if ($l && $::NO_SEGMENTED) {
475	root	1.36	my $delay = $::PER_TIMEOUT + 15;
476			while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
477	root	1.29	if ($delay <= 0) {
478	root	1.30	$self->err_segmented_download;
479	root	1.29	} else {
480	root	1.36	Coro::Event::do_timer(after => 4); $delay -= 4;
481	root	1.29	}
482	root	1.4	}
483			}
484
485	root	1.1	$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	root	1.9	$self->{path} =~ /\.([^.]+)$/;
495			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
496	root	1.1	$hdr->{"Content-Length"} = $length;
497
498	root	1.4	$self->response(@code, $hdr, "");
499	root	1.1
500			if ($self->{method} eq "GET") {
501	root	1.32	$self->{time} = $::NOW;
502
503	root	1.35	my $fudge = $queue->[0]->waiters;
504			$fudge = $fudge ? ($fudge+1)/$fudge : 1;
505
506			$queue->[1] *= $fudge;
507	root	1.34	my $transfer = $queue->[0]->guard;
508	root	1.32
509	root	1.35	if ($fudge != 1) {
510			$queue->[1] /= $fudge;
511			$queue->[1] = $queue->[1] * $::wait_factor
512			+ ($::NOW - $self->{time}) * (1 - $::wait_factor);
513			}
514	root	1.32	$self->{time} = $::NOW;
515	root	1.35
516			$self->{fh}->writable or return;
517	root	1.32
518	root	1.16	my ($fh, $buf, $r);
519			my $current = $Coro::current;
520	root	1.1	open $fh, "<", $self->{path}
521			or die "$self->{path}: late open failure ($!)";
522
523			$h -= $l - 1;
524
525	root	1.19	if (0) {
526			if ($l) {
527			sysseek $fh, $l, 0;
528			}
529			}
530
531	root	1.1	while ($h > 0) {
532	root	1.19	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 = $_[0];
539	root	1.37	Coro::ready($current);
540	root	1.19	});
541			&Coro::schedule;
542			last unless $r;
543			}
544	root	1.37	my $w = syswrite $self->{fh}, $buf
545	root	1.1	or last;
546	root	1.11	$::written += $w;
547			$self->{written} += $w;
548	root	1.16	$l += $r;
549	root	1.1	}
550	root	1.32
551			close $fh;
552	root	1.1	}
553	root	1.7	}
554
555	root	1.2	1;