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 () {
      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;

our $NOW;
our $HTTP_NOW;

Event->timer(interval => 1, hard => 1, cb => sub {
   $NOW = time;
   $HTTP_NOW = time2str $NOW;
})->now;

# the "main thread"
async {
   slog 1, "accepting connections";
   while () {
      $connections->down;
      push @newcons, [$http_port->accept];
      #slog 3, "accepted @$connections ".scalar(@pool);
      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;

   $::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:	1.37
Committed:	Sun Sep 2 01:03:53 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.36:	+2 -7 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	1.6	my $new = pop @newcons;
48			if ($new) {
49	root	1.1	eval {
50	root	1.6	conn->new(@$new)->handle;
51	root	1.1	};
52			slog 1, "$@" if $@ && !ref $@;
53			$connections->up;
54			} else {
55			last if @pool >= $MAX_POOL;
56			push @pool, $Coro::current;
57			schedule;
58			}
59			}
60			}
61
62	root	1.4	my $http_port = new Coro::Socket
63			LocalAddr => $SERVER_HOST,
64			LocalPort => $SERVER_PORT,
65			ReuseAddr => 1,
66	root	1.13	Listen => 50,
67	root	1.4	or die "unable to start server";
68
69			push @listen_sockets, $http_port;
70
71	root	1.32	our $NOW;
72			our $HTTP_NOW;
73
74			Event->timer(interval => 1, hard => 1, cb => sub {
75			$NOW = time;
76			$HTTP_NOW = time2str $NOW;
77	root	1.34	})->now;
78	root	1.32
79	root	1.2	# the "main thread"
80	root	1.1	async {
81			slog 1, "accepting connections";
82			while () {
83			$connections->down;
84	root	1.6	push @newcons, [$http_port->accept];
85	root	1.1	#slog 3, "accepted @$connections ".scalar(@pool);
86			if (@pool) {
87			(pop @pool)->ready;
88			} else {
89			async \&handler;
90			}
91
92			}
93			};
94
95			package conn;
96
97			use Socket;
98			use HTTP::Date;
99	root	1.2	use Convert::Scalar 'weaken';
100	root	1.16	use Linux::AIO;
101
102			Linux::AIO::min_parallel $::AIO_PARALLEL;
103
104			Event->io(fd => Linux::AIO::poll_fileno,
105	root	1.17	poll => 'r', async => 1,
106	root	1.21	cb => \&Linux::AIO::poll_cb);
107	root	1.16
108	root	1.26	our %conn; # $conn{ip}{self} => connobj
109			our %uri; # $uri{ip}{uri}{self}
110	root	1.3	our %blocked;
111	root	1.9	our %mimetype;
112
113			sub read_mimetypes {
114			local *M;
115	root	1.10	if (open M, "<mime_types") {
116	root	1.9	while (<M>) {
117			if (/^([^#]\S+)\t+(\S+)$/) {
118			$mimetype{lc $1} = $2;
119			}
120			}
121			} else {
122	root	1.10	print "cannot open mime_types\n";
123	root	1.9	}
124			}
125	root	1.1
126	root	1.10	read_mimetypes;
127
128	root	1.1	sub new {
129			my $class = shift;
130	root	1.6	my $peername = shift;
131	root	1.1	my $fh = shift;
132	root	1.2	my $self = bless { fh => $fh }, $class;
133	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
134			or $self->err(500, "unable to decode peername");
135	root	1.7
136	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
137	root	1.11	$self->{time} = $::NOW;
138	root	1.2
139	root	1.13	$::conns++;
140
141	root	1.2	$self;
142			}
143
144			sub DESTROY {
145			my $self = shift;
146	root	1.13
147			$::conns--;
148
149	root	1.19	$self->eoconn;
150			}
151
152			# end of connection
153			sub eoconn {
154	root	1.26	my $self = shift;
155	root	1.36
156			# clean up hints
157			delete $conn{$self->{remote_id}}{$self*1};
158			delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
159	root	1.1	}
160
161			sub slog {
162	root	1.4	my $self = shift;
163	root	1.29	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
164	root	1.1	}
165
166	root	1.4	sub response {
167	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
168	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
169	root	1.1
170	root	1.28	$self->{h}{connection} \|\|= $hdr->{Connection};
171
172	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
173	root	1.1
174			while (my ($h, $v) = each %$hdr) {
175			$res .= "$h: $v\015\012"
176			}
177	root	1.10	$res .= "\015\012";
178	root	1.4
179	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
180	root	1.1
181	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
182
183			print $accesslog $log if $accesslog;
184			print STDERR $log;
185	root	1.2
186	root	1.11	$self->{written} +=
187			print {$self->{fh}} $res;
188	root	1.1	}
189
190			sub err {
191			my $self = shift;
192			my ($code, $msg, $hdr, $content) = @_;
193
194			unless (defined $content) {
195	root	1.35	$content = "$code $msg\n";
196	root	1.1	$hdr->{"Content-Type"} = "text/plain";
197			$hdr->{"Content-Length"} = length $content;
198			}
199	root	1.17	$hdr->{"Connection"} = "close";
200	root	1.1
201	root	1.4	$self->response($code, $msg, $hdr, $content);
202	root	1.1
203			die bless {}, err::;
204			}
205
206			sub handle {
207			my $self = shift;
208			my $fh = $self->{fh};
209
210	root	1.29	my $host;
211
212	root	1.17	$fh->timeout($::REQ_TIMEOUT);
213			while() {
214			$self->{reqs}++;
215	root	1.1
216			# read request and parse first line
217			my $req = $fh->readline("\015\012\015\012");
218
219	root	1.17	unless (defined $req) {
220			if (exists $self->{version}) {
221			last;
222			} else {
223			$self->err(408, "request timeout");
224			}
225			}
226
227			$self->{h} = {};
228	root	1.1
229	root	1.17	$fh->timeout($::RES_TIMEOUT);
230	root	1.3
231	root	1.1	$req =~ /^(?:\015\012)?
232			(GET\|HEAD) \040+
233			([^\040]+) \040+
234			HTTP\/([0-9]+\.[0-9]+)
235			\015\012/gx
236	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
237	root	1.1
238			$self->{method} = $1;
239			$self->{uri} = $2;
240	root	1.17	$self->{version} = $3;
241
242	root	1.20	$3 =~ /^1\./
243	root	1.17	or $self->err(506, "http protocol version $3 not supported");
244	root	1.1
245			# parse headers
246			{
247			my (%hdr, $h, $v);
248
249			$hdr{lc $1} .= ",$2"
250			while $req =~ /\G
251			([^:\000-\040]+):
252			[\008\040]*
253			((?: [^\015\012]+ \| \015\012[\008\040] )*)
254			\015\012
255			/gxc;
256
257			$req =~ /\G\015\012$/
258			or $self->err(400, "bad request");
259
260			$self->{h}{$h} = substr $v, 1
261			while ($h, $v) = each %hdr;
262			}
263
264	root	1.36	# remote id should be unique per user
265			my $id = $self->{remote_addr};
266
267			if (exists $self->{h}{"client-ip"}) {
268			$id .= "[".$self->{h}{"client-ip"}."]";
269			} elsif (exists $self->{h}{"x-forwarded-for"}) {
270			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
271			}
272
273			$self->{remote_id} = $id;
274
275			if ($blocked{$id}) {
276			$self->err_blocked($blocked{$id})
277			if $blocked{$id} > $::NOW;
278
279			delete $blocked{$id};
280			}
281
282			if (%{$conn{$id}} >= $::MAX_CONN_IP) {
283			my $delay = $::PER_TIMEOUT + 15;
284			while (%{$conn{$id}} >= $::MAX_CONN_IP) {
285			if ($delay <= 0) {
286			$self->slog(2, "blocked ip $id");
287			$self->err_blocked;
288			} else {
289			Coro::Event::do_timer(after => 4); $delay -= 4;
290			}
291			}
292			}
293
294	root	1.29	# find out server name and port
295			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
296			$host = $1;
297			} else {
298			$host = $self->{h}{host};
299			}
300
301			if (defined $host) {
302			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
303			} else {
304			($self->{server_port}, $host)
305			= unpack_sockaddr_in $self->{fh}->getsockname
306			or $self->err(500, "unable to get socket name");
307			$host = inet_ntoa $host;
308			}
309
310			$self->{server_name} = $host;
311
312	root	1.36	# enter ourselves into various lists
313			weaken ($conn{$id}{$self*1} = $self);
314			weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
315	root	1.1
316	root	1.24	eval {
317			$self->map_uri;
318			$self->respond;
319			};
320
321	root	1.26	$self->eoconn;
322
323	root	1.24	die if $@ && !ref $@;
324	root	1.17
325	root	1.29	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
326	root	1.17
327			$fh->timeout($::PER_TIMEOUT);
328			}
329	root	1.1	}
330
331			# uri => path mapping
332			sub map_uri {
333			my $self = shift;
334	root	1.29	my $host = $self->{server_name};
335	root	1.1	my $uri = $self->{uri};
336
337			# some massaging, also makes it more secure
338			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
339			$uri =~ s%//+%/%g;
340			$uri =~ s%/\.(?=/\|$)%%g;
341			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
342
343			$uri =~ m%^/?\.\.(?=/\|$)%
344			and $self->err(400, "bad request");
345
346			$self->{name} = $uri;
347
348			# now do the path mapping
349			$self->{path} = "$::DOCROOT/$host$uri";
350	root	1.7
351			$self->access_check;
352	root	1.1	}
353
354			sub _cgi {
355			my $self = shift;
356			my $path = shift;
357			my $fh;
358
359			# no two-way xxx supported
360			if (0 == fork) {
361			open STDOUT, ">&".fileno($self->{fh});
362			if (chdir $::DOCROOT) {
363			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
364	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
365			$ENV{HTTP_PORT} = $self->{server_port};
366	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
367	root	1.10	exec $path;
368	root	1.1	}
369			Coro::State::_exit(0);
370			} else {
371	root	1.29	die;
372	root	1.1	}
373			}
374
375	root	1.29	sub server_hostport {
376			$_[0]{server_port} == 80
377			? $_[0]{server_name}
378			: "$_[0]{server_name}:$_[0]{server_port}";
379			}
380
381	root	1.1	sub respond {
382			my $self = shift;
383			my $path = $self->{path};
384
385			stat $path
386			or $self->err(404, "not found");
387
388	root	1.10	$self->{stat} = [stat _];
389
390	root	1.1	# idiotic netscape sends idiotic headers AGAIN
391			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
392			? str2time $1 : 0;
393
394			if (-d _ && -r _) {
395			# directory
396			if ($path !~ /\/$/) {
397			# create a redirect to get the trailing "/"
398	root	1.29	# we don't try to avoid the :80
399			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
400	root	1.1	} else {
401	root	1.10	$ims < $self->{stat}[9]
402	root	1.1	or $self->err(304, "not modified");
403
404	root	1.25	if (-r "$path/index.html") {
405			$self->{path} .= "/index.html";
406			$self->handle_file;
407			} else {
408			$self->handle_dir;
409	root	1.1	}
410			}
411			} elsif (-f _ && -r _) {
412			-x _ and $self->err(403, "forbidden");
413			$self->handle_file;
414			} else {
415			$self->err(404, "not found");
416			}
417			}
418
419			sub handle_dir {
420			my $self = shift;
421	root	1.10	my $idx = $self->diridx;
422
423			$self->response(200, "ok",
424			{
425			"Content-Type" => "text/html",
426			"Content-Length" => length $idx,
427			},
428			$idx);
429	root	1.1	}
430
431			sub handle_file {
432			my $self = shift;
433	root	1.34	my $length = $self->{stat}[7];
434			my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
435	root	1.1	my $hdr = {
436			"Last-Modified" => time2str ((stat _)[9]),
437			};
438
439			my @code = (200, "ok");
440			my ($l, $h);
441
442			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
443			for (split /,/, $1) {
444			if (/^-(\d+)$/) {
445			($l, $h) = ($length - $1, $length - 1);
446			} elsif (/^(\d+)-(\d*)$/) {
447			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
448			} else {
449			($l, $h) = (0, $length - 1);
450			goto ignore;
451			}
452	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
453	root	1.1	}
454			$hdr->{"Content-Range"} = "bytes */$length";
455	root	1.24	$hdr->{"Content-Length"} = $length;
456			$self->err(416, "not satisfiable", $hdr, "");
457	root	1.1
458			satisfiable:
459	root	1.4	# check for segmented downloads
460	root	1.10	if ($l && $::NO_SEGMENTED) {
461	root	1.36	my $delay = $::PER_TIMEOUT + 15;
462			while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
463	root	1.29	if ($delay <= 0) {
464	root	1.30	$self->err_segmented_download;
465	root	1.29	} else {
466	root	1.36	Coro::Event::do_timer(after => 4); $delay -= 4;
467	root	1.29	}
468	root	1.4	}
469			}
470
471	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
472			@code = (206, "partial content");
473			$length = $h - $l + 1;
474
475			ignore:
476			} else {
477			($l, $h) = (0, $length - 1);
478			}
479
480	root	1.9	$self->{path} =~ /\.([^.]+)$/;
481			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
482	root	1.1	$hdr->{"Content-Length"} = $length;
483
484	root	1.4	$self->response(@code, $hdr, "");
485	root	1.1
486			if ($self->{method} eq "GET") {
487	root	1.32	$self->{time} = $::NOW;
488
489	root	1.35	my $fudge = $queue->[0]->waiters;
490			$fudge = $fudge ? ($fudge+1)/$fudge : 1;
491
492			$queue->[1] *= $fudge;
493	root	1.34	my $transfer = $queue->[0]->guard;
494	root	1.32
495	root	1.35	if ($fudge != 1) {
496			$queue->[1] /= $fudge;
497			$queue->[1] = $queue->[1] * $::wait_factor
498			+ ($::NOW - $self->{time}) * (1 - $::wait_factor);
499			}
500	root	1.32	$self->{time} = $::NOW;
501	root	1.35
502			$self->{fh}->writable or return;
503	root	1.32
504	root	1.16	my ($fh, $buf, $r);
505			my $current = $Coro::current;
506	root	1.1	open $fh, "<", $self->{path}
507			or die "$self->{path}: late open failure ($!)";
508
509			$h -= $l - 1;
510
511	root	1.19	if (0) {
512			if ($l) {
513			sysseek $fh, $l, 0;
514			}
515			}
516
517	root	1.1	while ($h > 0) {
518	root	1.19	if (0) {
519			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
520			or last;
521			} else {
522			aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
523			$buf, 0, sub {
524			$r = $_[0];
525	root	1.37	Coro::ready($current);
526	root	1.19	});
527			&Coro::schedule;
528			last unless $r;
529			}
530	root	1.37	my $w = syswrite $self->{fh}, $buf
531	root	1.1	or last;
532	root	1.11	$::written += $w;
533			$self->{written} += $w;
534	root	1.16	$l += $r;
535	root	1.1	}
536	root	1.32
537			close $fh;
538	root	1.1	}
539	root	1.7	}
540
541	root	1.2	1;