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;

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 $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;

   $::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} ||= $hdr->{Connection};

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

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

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

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

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

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

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

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

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

   die bless {}, err::;
}

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

   my $host;

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

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

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

      $self->{h} = {};

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

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

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

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

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

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

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

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

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

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

      $self->{remote_id} = $id;

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

         delete $blocked{$id};
      }

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

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

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

      $self->{server_name} = $host;

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

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

      $self->eoconn;

      die if $@ && !ref $@;

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

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

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

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

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

   $self->{name} = $uri;

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

   $self->access_check;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

      $h -= $l - 1;

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

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

      close $fh;
   }
}

1;
Revision:	1.40
Committed:	Mon Sep 3 00:06:06 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.39:	+32 -17 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			my $http_port = new Coro::Socket
93			LocalAddr => $SERVER_HOST,
94			LocalPort => $SERVER_PORT2,
95			ReuseAddr => 1,
96			Listen => 50,
97			or die "unable to start server";
98
99			listen_on $http_port;
100	root	1.4
101	root	1.32	our $NOW;
102			our $HTTP_NOW;
103
104			Event->timer(interval => 1, hard => 1, cb => sub {
105			$NOW = time;
106			$HTTP_NOW = time2str $NOW;
107	root	1.34	})->now;
108	root	1.1
109			package conn;
110
111			use Socket;
112			use HTTP::Date;
113	root	1.2	use Convert::Scalar 'weaken';
114	root	1.16	use Linux::AIO;
115
116			Linux::AIO::min_parallel $::AIO_PARALLEL;
117
118			Event->io(fd => Linux::AIO::poll_fileno,
119	root	1.17	poll => 'r', async => 1,
120	root	1.21	cb => \&Linux::AIO::poll_cb);
121	root	1.16
122	root	1.26	our %conn; # $conn{ip}{self} => connobj
123			our %uri; # $uri{ip}{uri}{self}
124	root	1.3	our %blocked;
125	root	1.9	our %mimetype;
126
127			sub read_mimetypes {
128			local *M;
129	root	1.10	if (open M, "<mime_types") {
130	root	1.9	while (<M>) {
131			if (/^([^#]\S+)\t+(\S+)$/) {
132			$mimetype{lc $1} = $2;
133			}
134			}
135			} else {
136	root	1.10	print "cannot open mime_types\n";
137	root	1.9	}
138			}
139	root	1.1
140	root	1.10	read_mimetypes;
141
142	root	1.1	sub new {
143			my $class = shift;
144	root	1.6	my $peername = shift;
145	root	1.1	my $fh = shift;
146	root	1.2	my $self = bless { fh => $fh }, $class;
147	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
148			or $self->err(500, "unable to decode peername");
149	root	1.7
150	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
151	root	1.11	$self->{time} = $::NOW;
152	root	1.2
153	root	1.13	$::conns++;
154
155	root	1.2	$self;
156			}
157
158			sub DESTROY {
159			my $self = shift;
160	root	1.13	$::conns--;
161	root	1.19	$self->eoconn;
162			}
163
164			# end of connection
165			sub eoconn {
166	root	1.26	my $self = shift;
167	root	1.36
168			# clean up hints
169			delete $conn{$self->{remote_id}}{$self*1};
170			delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
171	root	1.1	}
172
173			sub slog {
174	root	1.4	my $self = shift;
175	root	1.29	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
176	root	1.1	}
177
178	root	1.4	sub response {
179	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
180	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
181	root	1.1
182	root	1.28	$self->{h}{connection} \|\|= $hdr->{Connection};
183
184	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
185	root	1.1
186			while (my ($h, $v) = each %$hdr) {
187			$res .= "$h: $v\015\012"
188			}
189	root	1.10	$res .= "\015\012";
190	root	1.4
191	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
192	root	1.1
193	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
194
195			print $accesslog $log if $accesslog;
196			print STDERR $log;
197	root	1.2
198	root	1.11	$self->{written} +=
199			print {$self->{fh}} $res;
200	root	1.1	}
201
202			sub err {
203			my $self = shift;
204			my ($code, $msg, $hdr, $content) = @_;
205
206			unless (defined $content) {
207	root	1.35	$content = "$code $msg\n";
208	root	1.1	$hdr->{"Content-Type"} = "text/plain";
209			$hdr->{"Content-Length"} = length $content;
210			}
211	root	1.17	$hdr->{"Connection"} = "close";
212	root	1.1
213	root	1.4	$self->response($code, $msg, $hdr, $content);
214	root	1.1
215			die bless {}, err::;
216			}
217
218			sub handle {
219			my $self = shift;
220			my $fh = $self->{fh};
221
222	root	1.29	my $host;
223
224	root	1.17	$fh->timeout($::REQ_TIMEOUT);
225			while() {
226			$self->{reqs}++;
227	root	1.1
228			# read request and parse first line
229			my $req = $fh->readline("\015\012\015\012");
230
231	root	1.17	unless (defined $req) {
232			if (exists $self->{version}) {
233			last;
234			} else {
235			$self->err(408, "request timeout");
236			}
237			}
238
239			$self->{h} = {};
240	root	1.1
241	root	1.17	$fh->timeout($::RES_TIMEOUT);
242	root	1.3
243	root	1.1	$req =~ /^(?:\015\012)?
244			(GET\|HEAD) \040+
245			([^\040]+) \040+
246			HTTP\/([0-9]+\.[0-9]+)
247			\015\012/gx
248	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
249	root	1.1
250			$self->{method} = $1;
251			$self->{uri} = $2;
252	root	1.17	$self->{version} = $3;
253
254	root	1.20	$3 =~ /^1\./
255	root	1.17	or $self->err(506, "http protocol version $3 not supported");
256	root	1.1
257			# parse headers
258			{
259			my (%hdr, $h, $v);
260
261			$hdr{lc $1} .= ",$2"
262			while $req =~ /\G
263			([^:\000-\040]+):
264			[\008\040]*
265			((?: [^\015\012]+ \| \015\012[\008\040] )*)
266			\015\012
267			/gxc;
268
269			$req =~ /\G\015\012$/
270			or $self->err(400, "bad request");
271
272			$self->{h}{$h} = substr $v, 1
273			while ($h, $v) = each %hdr;
274			}
275
276	root	1.36	# remote id should be unique per user
277			my $id = $self->{remote_addr};
278
279			if (exists $self->{h}{"client-ip"}) {
280			$id .= "[".$self->{h}{"client-ip"}."]";
281			} elsif (exists $self->{h}{"x-forwarded-for"}) {
282			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
283			}
284
285			$self->{remote_id} = $id;
286
287			if ($blocked{$id}) {
288			$self->err_blocked($blocked{$id})
289			if $blocked{$id} > $::NOW;
290
291			delete $blocked{$id};
292			}
293
294			if (%{$conn{$id}} >= $::MAX_CONN_IP) {
295			my $delay = $::PER_TIMEOUT + 15;
296			while (%{$conn{$id}} >= $::MAX_CONN_IP) {
297			if ($delay <= 0) {
298			$self->slog(2, "blocked ip $id");
299			$self->err_blocked;
300			} else {
301			Coro::Event::do_timer(after => 4); $delay -= 4;
302			}
303			}
304			}
305
306	root	1.29	# find out server name and port
307			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
308			$host = $1;
309			} else {
310			$host = $self->{h}{host};
311			}
312
313			if (defined $host) {
314			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
315			} else {
316			($self->{server_port}, $host)
317			= unpack_sockaddr_in $self->{fh}->getsockname
318			or $self->err(500, "unable to get socket name");
319			$host = inet_ntoa $host;
320			}
321
322			$self->{server_name} = $host;
323
324	root	1.36	# enter ourselves into various lists
325			weaken ($conn{$id}{$self*1} = $self);
326			weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
327	root	1.1
328	root	1.24	eval {
329			$self->map_uri;
330			$self->respond;
331			};
332
333	root	1.26	$self->eoconn;
334
335	root	1.24	die if $@ && !ref $@;
336	root	1.17
337	root	1.29	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
338	root	1.17
339			$fh->timeout($::PER_TIMEOUT);
340			}
341	root	1.1	}
342
343			# uri => path mapping
344			sub map_uri {
345			my $self = shift;
346	root	1.29	my $host = $self->{server_name};
347	root	1.1	my $uri = $self->{uri};
348
349			# some massaging, also makes it more secure
350			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
351			$uri =~ s%//+%/%g;
352			$uri =~ s%/\.(?=/\|$)%%g;
353			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
354
355			$uri =~ m%^/?\.\.(?=/\|$)%
356			and $self->err(400, "bad request");
357
358			$self->{name} = $uri;
359
360			# now do the path mapping
361			$self->{path} = "$::DOCROOT/$host$uri";
362	root	1.7
363			$self->access_check;
364	root	1.1	}
365
366			sub _cgi {
367			my $self = shift;
368			my $path = shift;
369			my $fh;
370
371			# no two-way xxx supported
372			if (0 == fork) {
373			open STDOUT, ">&".fileno($self->{fh});
374			if (chdir $::DOCROOT) {
375			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
376	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
377			$ENV{HTTP_PORT} = $self->{server_port};
378	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
379	root	1.10	exec $path;
380	root	1.1	}
381			Coro::State::_exit(0);
382			} else {
383	root	1.29	die;
384	root	1.1	}
385			}
386
387	root	1.29	sub server_hostport {
388			$_[0]{server_port} == 80
389			? $_[0]{server_name}
390			: "$_[0]{server_name}:$_[0]{server_port}";
391			}
392
393	root	1.1	sub respond {
394			my $self = shift;
395			my $path = $self->{path};
396
397			stat $path
398			or $self->err(404, "not found");
399
400	root	1.10	$self->{stat} = [stat _];
401
402	root	1.1	# idiotic netscape sends idiotic headers AGAIN
403			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
404			? str2time $1 : 0;
405
406			if (-d _ && -r _) {
407			# directory
408			if ($path !~ /\/$/) {
409			# create a redirect to get the trailing "/"
410	root	1.29	# we don't try to avoid the :80
411			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
412	root	1.1	} else {
413	root	1.10	$ims < $self->{stat}[9]
414	root	1.1	or $self->err(304, "not modified");
415
416	root	1.25	if (-r "$path/index.html") {
417			$self->{path} .= "/index.html";
418			$self->handle_file;
419			} else {
420			$self->handle_dir;
421	root	1.1	}
422			}
423			} elsif (-f _ && -r _) {
424			-x _ and $self->err(403, "forbidden");
425			$self->handle_file;
426			} else {
427			$self->err(404, "not found");
428			}
429			}
430
431			sub handle_dir {
432			my $self = shift;
433	root	1.10	my $idx = $self->diridx;
434
435			$self->response(200, "ok",
436			{
437			"Content-Type" => "text/html",
438			"Content-Length" => length $idx,
439			},
440			$idx);
441	root	1.1	}
442
443			sub handle_file {
444			my $self = shift;
445	root	1.34	my $length = $self->{stat}[7];
446			my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
447	root	1.1	my $hdr = {
448			"Last-Modified" => time2str ((stat _)[9]),
449			};
450
451			my @code = (200, "ok");
452			my ($l, $h);
453
454			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
455			for (split /,/, $1) {
456			if (/^-(\d+)$/) {
457			($l, $h) = ($length - $1, $length - 1);
458			} elsif (/^(\d+)-(\d*)$/) {
459			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
460			} else {
461			($l, $h) = (0, $length - 1);
462			goto ignore;
463			}
464	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
465	root	1.1	}
466			$hdr->{"Content-Range"} = "bytes */$length";
467	root	1.24	$hdr->{"Content-Length"} = $length;
468			$self->err(416, "not satisfiable", $hdr, "");
469	root	1.1
470			satisfiable:
471	root	1.4	# check for segmented downloads
472	root	1.10	if ($l && $::NO_SEGMENTED) {
473	root	1.36	my $delay = $::PER_TIMEOUT + 15;
474			while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
475	root	1.29	if ($delay <= 0) {
476	root	1.30	$self->err_segmented_download;
477	root	1.29	} else {
478	root	1.36	Coro::Event::do_timer(after => 4); $delay -= 4;
479	root	1.29	}
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	1.32	$self->{time} = $::NOW;
500
501	root	1.35	my $fudge = $queue->[0]->waiters;
502			$fudge = $fudge ? ($fudge+1)/$fudge : 1;
503
504			$queue->[1] *= $fudge;
505	root	1.34	my $transfer = $queue->[0]->guard;
506	root	1.32
507	root	1.35	if ($fudge != 1) {
508			$queue->[1] /= $fudge;
509			$queue->[1] = $queue->[1] * $::wait_factor
510			+ ($::NOW - $self->{time}) * (1 - $::wait_factor);
511			}
512	root	1.32	$self->{time} = $::NOW;
513	root	1.35
514			$self->{fh}->writable or return;
515	root	1.32
516	root	1.16	my ($fh, $buf, $r);
517			my $current = $Coro::current;
518	root	1.1	open $fh, "<", $self->{path}
519			or die "$self->{path}: late open failure ($!)";
520
521			$h -= $l - 1;
522
523	root	1.19	if (0) {
524			if ($l) {
525			sysseek $fh, $l, 0;
526			}
527			}
528
529	root	1.1	while ($h > 0) {
530	root	1.19	if (0) {
531			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
532			or last;
533			} else {
534			aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
535			$buf, 0, sub {
536			$r = $_[0];
537	root	1.37	Coro::ready($current);
538	root	1.19	});
539			&Coro::schedule;
540			last unless $r;
541			}
542	root	1.37	my $w = syswrite $self->{fh}, $buf
543	root	1.1	or last;
544	root	1.11	$::written += $w;
545			$self->{written} += $w;
546	root	1.16	$l += $r;
547	root	1.1	}
548	root	1.32
549			close $fh;
550	root	1.1	}
551	root	1.7	}
552
553	root	1.2	1;