Coro/myhttpd/httpd.pl

use Coro;
use Coro::Semaphore;
use Coro::Event;
use Coro::Socket;
use Coro::Signal;

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 $httpevent   = new Coro::Signal;

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};

   $httpevent->broadcast;
}

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 + $::NOW + 15;
         while (%{$conn{$id}} >= $::MAX_CONN_IP) {
            if ($delay < $::NOW) {
               $self->slog(2, "blocked ip $id");
               $self->err_blocked;
            } else {
               $httpevent->wait;
            }
         }
      }

      # 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;

      $httpevent->broadcast;

      $fh->timeout($::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 = $::NOW + $::PER_TIMEOUT + 15;
         while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
            if ($delay <= $::NOW) {
               $self->err_segmented_download;
            } else {
               $httpevent->broadcast;
            }
         }
      }

      $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:	1.44
Committed:	Fri Sep 14 12:38:18 2001 UTC (22 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.43:	+12 -6 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	root	1.44	use Coro::Signal;
6	root	1.1
7	root	1.32	use HTTP::Date;
8
9	root	1.1	no utf8;
10			use bytes;
11
12			# at least on my machine, this thingy serves files
13			# quite a bit faster than apache, ;)
14			# and quite a bit slower than thttpd :(
15
16			$SIG{PIPE} = 'IGNORE';
17	root	1.27
18			our $accesslog;
19
20			if ($ACCESS_LOG) {
21			use IO::Handle;
22			open $accesslog, ">>$ACCESS_LOG"
23			or die "$ACCESS_LOG: $!";
24			$accesslog->autoflush(1);
25			}
26
27	root	1.1	sub slog {
28			my $level = shift;
29			my $format = shift;
30			printf "---: $format\n", @_;
31			}
32
33	root	1.32	our $connections = new Coro::Semaphore $MAX_CONNECTS \|\| 250;
34	root	1.44	our $httpevent = new Coro::Signal;
35	root	1.34
36			our $wait_factor = 0.95;
37
38			our @transfers = (
39	root	1.35	[(new Coro::Semaphore $MAX_TRANSFERS_SMALL \|\| 50), 1],
40			[(new Coro::Semaphore $MAX_TRANSFERS_LARGE \|\| 50), 1],
41	root	1.34	);
42	root	1.1
43	root	1.6	my @newcons;
44	root	1.1	my @pool;
45
46	root	1.2	# one "execution thread"
47	root	1.1	sub handler {
48			while () {
49	root	1.38	if (@newcons) {
50	root	1.1	eval {
51	root	1.38	conn->new(@{pop @newcons})->handle;
52	root	1.1	};
53			slog 1, "$@" if $@ && !ref $@;
54			$connections->up;
55			} else {
56			last if @pool >= $MAX_POOL;
57			push @pool, $Coro::current;
58			schedule;
59			}
60			}
61			}
62
63	root	1.40	sub listen_on {
64			my $listen = $_[0];
65
66			push @listen_sockets, $listen;
67
68			# the "main thread"
69			async {
70			slog 1, "accepting connections";
71			while () {
72			$connections->down;
73			push @newcons, [$listen->accept];
74			#slog 3, "accepted @$connections ".scalar(@pool);
75			if (@pool) {
76			(pop @pool)->ready;
77			} else {
78			async \&handler;
79			}
80
81			}
82			};
83			}
84
85	root	1.4	my $http_port = new Coro::Socket
86			LocalAddr => $SERVER_HOST,
87			LocalPort => $SERVER_PORT,
88			ReuseAddr => 1,
89	root	1.13	Listen => 50,
90	root	1.4	or die "unable to start server";
91
92	root	1.40	listen_on $http_port;
93
94	root	1.41	if ($SERVER_PORT2) {
95			my $http_port = new Coro::Socket
96			LocalAddr => $SERVER_HOST,
97			LocalPort => $SERVER_PORT2,
98			ReuseAddr => 1,
99			Listen => 50,
100			or die "unable to start server";
101	root	1.40
102	root	1.41	listen_on $http_port;
103			}
104	root	1.4
105	root	1.32	our $NOW;
106			our $HTTP_NOW;
107
108			Event->timer(interval => 1, hard => 1, cb => sub {
109			$NOW = time;
110			$HTTP_NOW = time2str $NOW;
111	root	1.34	})->now;
112	root	1.1
113			package conn;
114
115			use Socket;
116			use HTTP::Date;
117	root	1.2	use Convert::Scalar 'weaken';
118	root	1.16	use Linux::AIO;
119
120			Linux::AIO::min_parallel $::AIO_PARALLEL;
121
122			Event->io(fd => Linux::AIO::poll_fileno,
123	root	1.17	poll => 'r', async => 1,
124	root	1.21	cb => \&Linux::AIO::poll_cb);
125	root	1.16
126	root	1.26	our %conn; # $conn{ip}{self} => connobj
127			our %uri; # $uri{ip}{uri}{self}
128	root	1.3	our %blocked;
129	root	1.9	our %mimetype;
130
131			sub read_mimetypes {
132			local *M;
133	root	1.10	if (open M, "<mime_types") {
134	root	1.9	while (<M>) {
135			if (/^([^#]\S+)\t+(\S+)$/) {
136			$mimetype{lc $1} = $2;
137			}
138			}
139			} else {
140	root	1.10	print "cannot open mime_types\n";
141	root	1.9	}
142			}
143	root	1.1
144	root	1.10	read_mimetypes;
145
146	root	1.1	sub new {
147			my $class = shift;
148	root	1.42	my $fh = shift;
149	root	1.6	my $peername = shift;
150	root	1.2	my $self = bless { fh => $fh }, $class;
151	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
152			or $self->err(500, "unable to decode peername");
153	root	1.7
154	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
155	root	1.11	$self->{time} = $::NOW;
156	root	1.2
157	root	1.13	$::conns++;
158
159	root	1.2	$self;
160			}
161
162			sub DESTROY {
163			my $self = shift;
164	root	1.13	$::conns--;
165	root	1.19	$self->eoconn;
166			}
167
168			# end of connection
169			sub eoconn {
170	root	1.26	my $self = shift;
171	root	1.36
172			# clean up hints
173			delete $conn{$self->{remote_id}}{$self*1};
174			delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
175	root	1.44
176			$httpevent->broadcast;
177	root	1.1	}
178
179			sub slog {
180	root	1.4	my $self = shift;
181	root	1.29	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
182	root	1.1	}
183
184	root	1.4	sub response {
185	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
186	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
187	root	1.1
188	root	1.42	$self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;
189	root	1.28
190	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
191	root	1.1
192			while (my ($h, $v) = each %$hdr) {
193			$res .= "$h: $v\015\012"
194			}
195	root	1.10	$res .= "\015\012";
196	root	1.4
197	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
198	root	1.1
199	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
200
201			print $accesslog $log if $accesslog;
202			print STDERR $log;
203	root	1.2
204	root	1.11	$self->{written} +=
205			print {$self->{fh}} $res;
206	root	1.1	}
207
208			sub err {
209			my $self = shift;
210			my ($code, $msg, $hdr, $content) = @_;
211
212			unless (defined $content) {
213	root	1.35	$content = "$code $msg\n";
214	root	1.1	$hdr->{"Content-Type"} = "text/plain";
215			$hdr->{"Content-Length"} = length $content;
216			}
217	root	1.17	$hdr->{"Connection"} = "close";
218	root	1.1
219	root	1.4	$self->response($code, $msg, $hdr, $content);
220	root	1.1
221			die bless {}, err::;
222			}
223
224			sub handle {
225			my $self = shift;
226			my $fh = $self->{fh};
227
228	root	1.29	my $host;
229
230	root	1.17	$fh->timeout($::REQ_TIMEOUT);
231			while() {
232			$self->{reqs}++;
233	root	1.1
234			# read request and parse first line
235			my $req = $fh->readline("\015\012\015\012");
236
237	root	1.17	unless (defined $req) {
238			if (exists $self->{version}) {
239			last;
240			} else {
241			$self->err(408, "request timeout");
242			}
243			}
244
245			$self->{h} = {};
246	root	1.1
247	root	1.17	$fh->timeout($::RES_TIMEOUT);
248	root	1.3
249	root	1.1	$req =~ /^(?:\015\012)?
250			(GET\|HEAD) \040+
251			([^\040]+) \040+
252			HTTP\/([0-9]+\.[0-9]+)
253			\015\012/gx
254	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
255	root	1.1
256			$self->{method} = $1;
257			$self->{uri} = $2;
258	root	1.17	$self->{version} = $3;
259
260	root	1.20	$3 =~ /^1\./
261	root	1.17	or $self->err(506, "http protocol version $3 not supported");
262	root	1.1
263			# parse headers
264			{
265			my (%hdr, $h, $v);
266
267			$hdr{lc $1} .= ",$2"
268			while $req =~ /\G
269			([^:\000-\040]+):
270			[\008\040]*
271			((?: [^\015\012]+ \| \015\012[\008\040] )*)
272			\015\012
273			/gxc;
274
275			$req =~ /\G\015\012$/
276			or $self->err(400, "bad request");
277
278			$self->{h}{$h} = substr $v, 1
279			while ($h, $v) = each %hdr;
280			}
281
282	root	1.36	# remote id should be unique per user
283			my $id = $self->{remote_addr};
284
285			if (exists $self->{h}{"client-ip"}) {
286			$id .= "[".$self->{h}{"client-ip"}."]";
287			} elsif (exists $self->{h}{"x-forwarded-for"}) {
288			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
289			}
290
291			$self->{remote_id} = $id;
292
293			if ($blocked{$id}) {
294			$self->err_blocked($blocked{$id})
295			if $blocked{$id} > $::NOW;
296
297			delete $blocked{$id};
298			}
299
300			if (%{$conn{$id}} >= $::MAX_CONN_IP) {
301	root	1.44	my $delay = $::PER_TIMEOUT + $::NOW + 15;
302	root	1.36	while (%{$conn{$id}} >= $::MAX_CONN_IP) {
303	root	1.44	if ($delay < $::NOW) {
304	root	1.36	$self->slog(2, "blocked ip $id");
305			$self->err_blocked;
306			} else {
307	root	1.44	$httpevent->wait;
308	root	1.36	}
309			}
310			}
311
312	root	1.29	# find out server name and port
313			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
314			$host = $1;
315			} else {
316			$host = $self->{h}{host};
317			}
318
319			if (defined $host) {
320			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
321			} else {
322			($self->{server_port}, $host)
323	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
324	root	1.29	or $self->err(500, "unable to get socket name");
325			$host = inet_ntoa $host;
326			}
327
328			$self->{server_name} = $host;
329
330	root	1.36	# enter ourselves into various lists
331			weaken ($conn{$id}{$self*1} = $self);
332			weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
333	root	1.1
334	root	1.24	eval {
335			$self->map_uri;
336			$self->respond;
337			};
338
339	root	1.26	$self->eoconn;
340
341	root	1.24	die if $@ && !ref $@;
342	root	1.17
343	root	1.29	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
344	root	1.17
345	root	1.44	$httpevent->broadcast;
346
347	root	1.17	$fh->timeout($::PER_TIMEOUT);
348			}
349	root	1.1	}
350
351			# uri => path mapping
352			sub map_uri {
353			my $self = shift;
354	root	1.29	my $host = $self->{server_name};
355	root	1.1	my $uri = $self->{uri};
356
357			# some massaging, also makes it more secure
358			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
359			$uri =~ s%//+%/%g;
360			$uri =~ s%/\.(?=/\|$)%%g;
361			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
362
363			$uri =~ m%^/?\.\.(?=/\|$)%
364			and $self->err(400, "bad request");
365
366			$self->{name} = $uri;
367
368			# now do the path mapping
369			$self->{path} = "$::DOCROOT/$host$uri";
370	root	1.7
371			$self->access_check;
372	root	1.1	}
373
374			sub _cgi {
375			my $self = shift;
376			my $path = shift;
377			my $fh;
378
379			# no two-way xxx supported
380			if (0 == fork) {
381			open STDOUT, ">&".fileno($self->{fh});
382			if (chdir $::DOCROOT) {
383			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
384	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
385			$ENV{HTTP_PORT} = $self->{server_port};
386	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
387	root	1.10	exec $path;
388	root	1.1	}
389			Coro::State::_exit(0);
390			} else {
391	root	1.29	die;
392	root	1.1	}
393			}
394
395	root	1.29	sub server_hostport {
396			$_[0]{server_port} == 80
397			? $_[0]{server_name}
398			: "$_[0]{server_name}:$_[0]{server_port}";
399			}
400
401	root	1.1	sub respond {
402			my $self = shift;
403			my $path = $self->{path};
404
405			stat $path
406			or $self->err(404, "not found");
407
408	root	1.10	$self->{stat} = [stat _];
409
410	root	1.1	# idiotic netscape sends idiotic headers AGAIN
411			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
412			? str2time $1 : 0;
413
414			if (-d _ && -r _) {
415			# directory
416			if ($path !~ /\/$/) {
417			# create a redirect to get the trailing "/"
418	root	1.29	# we don't try to avoid the :80
419			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
420	root	1.1	} else {
421	root	1.10	$ims < $self->{stat}[9]
422	root	1.1	or $self->err(304, "not modified");
423
424	root	1.25	if (-r "$path/index.html") {
425			$self->{path} .= "/index.html";
426			$self->handle_file;
427			} else {
428			$self->handle_dir;
429	root	1.1	}
430			}
431			} elsif (-f _ && -r _) {
432			-x _ and $self->err(403, "forbidden");
433			$self->handle_file;
434			} else {
435			$self->err(404, "not found");
436			}
437			}
438
439			sub handle_dir {
440			my $self = shift;
441	root	1.10	my $idx = $self->diridx;
442
443			$self->response(200, "ok",
444			{
445			"Content-Type" => "text/html",
446			"Content-Length" => length $idx,
447			},
448			$idx);
449	root	1.1	}
450
451			sub handle_file {
452			my $self = shift;
453	root	1.34	my $length = $self->{stat}[7];
454			my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
455	root	1.1	my $hdr = {
456			"Last-Modified" => time2str ((stat _)[9]),
457			};
458
459			my @code = (200, "ok");
460			my ($l, $h);
461
462			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
463			for (split /,/, $1) {
464			if (/^-(\d+)$/) {
465			($l, $h) = ($length - $1, $length - 1);
466			} elsif (/^(\d+)-(\d*)$/) {
467			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
468			} else {
469			($l, $h) = (0, $length - 1);
470			goto ignore;
471			}
472	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
473	root	1.1	}
474			$hdr->{"Content-Range"} = "bytes */$length";
475	root	1.24	$hdr->{"Content-Length"} = $length;
476			$self->err(416, "not satisfiable", $hdr, "");
477	root	1.1
478			satisfiable:
479	root	1.4	# check for segmented downloads
480	root	1.10	if ($l && $::NO_SEGMENTED) {
481	root	1.44	my $delay = $::NOW + $::PER_TIMEOUT + 15;
482	root	1.36	while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
483	root	1.44	if ($delay <= $::NOW) {
484	root	1.30	$self->err_segmented_download;
485	root	1.29	} else {
486	root	1.44	$httpevent->broadcast;
487	root	1.29	}
488	root	1.4	}
489			}
490
491	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
492			@code = (206, "partial content");
493			$length = $h - $l + 1;
494
495			ignore:
496			} else {
497			($l, $h) = (0, $length - 1);
498			}
499
500	root	1.9	$self->{path} =~ /\.([^.]+)$/;
501			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
502	root	1.1	$hdr->{"Content-Length"} = $length;
503
504	root	1.4	$self->response(@code, $hdr, "");
505	root	1.1
506			if ($self->{method} eq "GET") {
507	root	1.32	$self->{time} = $::NOW;
508
509	root	1.35	my $fudge = $queue->[0]->waiters;
510			$fudge = $fudge ? ($fudge+1)/$fudge : 1;
511
512			$queue->[1] *= $fudge;
513	root	1.34	my $transfer = $queue->[0]->guard;
514	root	1.32
515	root	1.35	if ($fudge != 1) {
516			$queue->[1] /= $fudge;
517			$queue->[1] = $queue->[1] * $::wait_factor
518			+ ($::NOW - $self->{time}) * (1 - $::wait_factor);
519			}
520	root	1.32	$self->{time} = $::NOW;
521	root	1.35
522			$self->{fh}->writable or return;
523	root	1.32
524	root	1.16	my ($fh, $buf, $r);
525			my $current = $Coro::current;
526	root	1.1	open $fh, "<", $self->{path}
527			or die "$self->{path}: late open failure ($!)";
528
529			$h -= $l - 1;
530
531	root	1.19	if (0) {
532			if ($l) {
533			sysseek $fh, $l, 0;
534			}
535			}
536
537	root	1.1	while ($h > 0) {
538	root	1.19	if (0) {
539			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
540			or last;
541			} else {
542			aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
543			$buf, 0, sub {
544			$r = $_[0];
545	root	1.37	Coro::ready($current);
546	root	1.19	});
547			&Coro::schedule;
548			last unless $r;
549			}
550	root	1.37	my $w = syswrite $self->{fh}, $buf
551	root	1.1	or last;
552	root	1.11	$::written += $w;
553			$self->{written} += $w;
554	root	1.16	$l += $r;
555	root	1.1	}
556	root	1.32
557			close $fh;
558	root	1.1	}
559	root	1.7	}
560
561	root	1.2	1;