Coro/myhttpd/httpd.pl

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

use HTTP::Date;
use POSIX ();

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;
our $errorlog;

our $NOW;
our $HTTP_NOW;

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

if ($ERROR_LOG) {
   use IO::Handle;
   open $errorlog, ">>$ERROR_LOG"
     or die "$ERROR_LOG: $!";
   $errorlog->autoflush(1);
}

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;
   my $NOW = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW);
   printf "$NOW: $format\n", @_;
   printf $errorlog "$NOW: $format\n", @_ if $errorlog;
}

our $connections = new Coro::Semaphore $MAX_CONNECTS || 250;
our $httpevent   = new Coro::Signal;

our $queue_file  = new transferqueue $MAX_TRANSFERS;
our $queue_index = new transferqueue 10;

my @newcons;
my @pool;

# one "execution thread"
sub handler {
   while () {
      if (@newcons) {
         eval {
            conn->new(@{pop @newcons})->handle;
         };
         slog 1, "$@" if $@ && !ref $@;

         $httpevent->broadcast; # only for testing, but doesn't matter much

         $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;
}

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} =
      $self->{remote_id} = inet_ntoa $iaddr;

   $self->{time} = $::NOW;

   weaken ($Coro::current->{conn} = $self);

   $::conns++;
   $::maxconns = $::conns if $::conns > $::maxconns;

   $self;
}

sub DESTROY {
   #my $self = shift;
   $::conns--;
}

sub slog {
   my $self = shift;
   main::slog($_[0], "$self->{remote_id}> $_[1]");
}

sub response {
   my ($self, $code, $msg, $hdr, $content) = @_;
   my $res = "HTTP/1.1 $code $msg\015\012";

   if (exists $hdr->{Connection}) {
      if ($hdr->{Connection} =~ /close/) {
         $self->{h}{connection} = "close"
      }
   } else {
      if ($self->{version} < 1.1) {
         if ($self->{h}{connection} =~ /keep-alive/i) {
            $hdr->{Connection} = "Keep-Alive";
         } else {
            $self->{h}{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 = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $NOW).
             " $self->{remote_id} \"$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;

      weaken (local $conn{$id}{$self*1} = $self);

      if ($blocked{$id}) {
         $self->err_blocked
            if $blocked{$id}[0] > $::NOW;

         delete $blocked{$id};
      }

      # 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;

      weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);

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

      die if $@ && !ref $@;

      last if $self->{h}{connection} =~ /close/i;

      $httpevent->broadcast;

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

sub block {
   my $self = shift;

   $blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
   $self->slog(2, "blocked ip $self->{remote_id}");
   $self->err_blocked;
}

# 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};

   if ($self->{name} =~ s%^/internal/([^/]+)%%) {
      if ($::internal{$1}) {
         $::internal{$1}->($self);
      } else {
         $self->err(404, "not found");
      }
   } else {

      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") {
               # replace directory "size" by index.html filesize
               $self->{stat} = [stat ($self->{path} .= "/index.html")];
               $self->handle_file($queue_index);
            } else {
               $self->handle_dir;
            }
         }
      } elsif (-f _ && -r _) {
         -x _ and $self->err(403, "forbidden");

         if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
            my $timeout = $::NOW + 10;
            while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
               if ($timeout < $::NOW) {
                  $self->block($::BLOCKTIME, "too many connections");
               } else {
                  $httpevent->wait;
               }
            }
         }

         $self->handle_file($queue_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 $idx,
            "Last-Modified"  => time2str ($self->{stat}[9]),
         },
         $idx);
}

sub handle_file {
   my ($self, $queue) = @_;
   my $length = $self->{stat}[7];
   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 $timeout = $::NOW + 15;
         while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
            if ($timeout <= $::NOW) {
               $self->block($::BLOCKTIME, "segmented downloads are forbidden");
               #$self->err_segmented_download;
            } else {
               $httpevent->wait;
            }
         }
      }

      $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 $current = $Coro::current;

      my ($fh, $buf, $r);

      open $fh, "<", $self->{path}
         or die "$self->{path}: late open failure ($!)";

      $h -= $l - 1;

      if (0) { # !AIO
         if ($l) {
            sysseek $fh, $l, 0;
         }
      }
      
      my $transfer = $queue->start_transfer($h);
      my $locked;
      my $bufsize = $::WAIT_BUFSIZE; # initial buffer size

      while ($h > 0) {
         unless ($locked) {
            if ($locked ||= $transfer->try($::WAIT_INTERVAL)) {
               $bufsize = $::BUFSIZE;
               $self->{time} = $::NOW;
            }
         }

         if ($blocked{$self->{remote_id}}) {
            $self->{h}{connection} = "close";
            die bless {}, err::;
         }

         if (0) { # !AIO
            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:	1.60
Committed:	Mon Dec 10 21:18:31 2001 UTC (22 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.59:	+1 -0 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	root	1.47	use POSIX ();
9	root	1.32
10	root	1.1	no utf8;
11			use bytes;
12
13			# at least on my machine, this thingy serves files
14			# quite a bit faster than apache, ;)
15			# and quite a bit slower than thttpd :(
16
17			$SIG{PIPE} = 'IGNORE';
18	root	1.27
19			our $accesslog;
20	root	1.56	our $errorlog;
21
22			our $NOW;
23			our $HTTP_NOW;
24
25			Event->timer(interval => 1, hard => 1, cb => sub {
26			$NOW = time;
27			$HTTP_NOW = time2str $NOW;
28			})->now;
29
30			if ($ERROR_LOG) {
31			use IO::Handle;
32			open $errorlog, ">>$ERROR_LOG"
33			or die "$ERROR_LOG: $!";
34			$errorlog->autoflush(1);
35			}
36	root	1.27
37			if ($ACCESS_LOG) {
38			use IO::Handle;
39			open $accesslog, ">>$ACCESS_LOG"
40			or die "$ACCESS_LOG: $!";
41			$accesslog->autoflush(1);
42			}
43
44	root	1.1	sub slog {
45			my $level = shift;
46			my $format = shift;
47	root	1.56	my $NOW = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW);
48			printf "$NOW: $format\n", @_;
49			printf $errorlog "$NOW: $format\n", @_ if $errorlog;
50	root	1.1	}
51
52	root	1.32	our $connections = new Coro::Semaphore $MAX_CONNECTS \|\| 250;
53	root	1.44	our $httpevent = new Coro::Signal;
54	root	1.34
55	root	1.56	our $queue_file = new transferqueue $MAX_TRANSFERS;
56			our $queue_index = new transferqueue 10;
57	root	1.1
58	root	1.6	my @newcons;
59	root	1.1	my @pool;
60
61	root	1.2	# one "execution thread"
62	root	1.1	sub handler {
63			while () {
64	root	1.38	if (@newcons) {
65	root	1.1	eval {
66	root	1.38	conn->new(@{pop @newcons})->handle;
67	root	1.1	};
68			slog 1, "$@" if $@ && !ref $@;
69	root	1.56
70			$httpevent->broadcast; # only for testing, but doesn't matter much
71
72	root	1.1	$connections->up;
73			} else {
74			last if @pool >= $MAX_POOL;
75			push @pool, $Coro::current;
76			schedule;
77			}
78			}
79			}
80
81	root	1.40	sub listen_on {
82			my $listen = $_[0];
83
84			push @listen_sockets, $listen;
85
86			# the "main thread"
87			async {
88			slog 1, "accepting connections";
89			while () {
90			$connections->down;
91			push @newcons, [$listen->accept];
92			#slog 3, "accepted @$connections ".scalar(@pool);
93			if (@pool) {
94			(pop @pool)->ready;
95			} else {
96			async \&handler;
97			}
98
99			}
100			};
101			}
102
103	root	1.4	my $http_port = new Coro::Socket
104			LocalAddr => $SERVER_HOST,
105			LocalPort => $SERVER_PORT,
106			ReuseAddr => 1,
107	root	1.13	Listen => 50,
108	root	1.4	or die "unable to start server";
109
110	root	1.40	listen_on $http_port;
111
112	root	1.41	if ($SERVER_PORT2) {
113			my $http_port = new Coro::Socket
114			LocalAddr => $SERVER_HOST,
115			LocalPort => $SERVER_PORT2,
116			ReuseAddr => 1,
117			Listen => 50,
118			or die "unable to start server";
119	root	1.40
120	root	1.41	listen_on $http_port;
121			}
122	root	1.4
123	root	1.1	package conn;
124
125			use Socket;
126			use HTTP::Date;
127	root	1.2	use Convert::Scalar 'weaken';
128	root	1.16	use Linux::AIO;
129
130			Linux::AIO::min_parallel $::AIO_PARALLEL;
131
132			Event->io(fd => Linux::AIO::poll_fileno,
133	root	1.17	poll => 'r', async => 1,
134	root	1.21	cb => \&Linux::AIO::poll_cb);
135	root	1.16
136	root	1.26	our %conn; # $conn{ip}{self} => connobj
137			our %uri; # $uri{ip}{uri}{self}
138	root	1.3	our %blocked;
139	root	1.9	our %mimetype;
140
141			sub read_mimetypes {
142			local *M;
143	root	1.10	if (open M, "<mime_types") {
144	root	1.9	while (<M>) {
145			if (/^([^#]\S+)\t+(\S+)$/) {
146			$mimetype{lc $1} = $2;
147			}
148			}
149			} else {
150	root	1.10	print "cannot open mime_types\n";
151	root	1.9	}
152			}
153	root	1.1
154	root	1.10	read_mimetypes;
155
156	root	1.1	sub new {
157			my $class = shift;
158	root	1.42	my $fh = shift;
159	root	1.6	my $peername = shift;
160	root	1.2	my $self = bless { fh => $fh }, $class;
161	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
162			or $self->err(500, "unable to decode peername");
163	root	1.7
164	root	1.50	$self->{remote_addr} =
165			$self->{remote_id} = inet_ntoa $iaddr;
166	root	1.60
167	root	1.11	$self->{time} = $::NOW;
168	root	1.2
169	root	1.49	weaken ($Coro::current->{conn} = $self);
170
171	root	1.13	$::conns++;
172	root	1.53	$::maxconns = $::conns if $::conns > $::maxconns;
173	root	1.13
174	root	1.2	$self;
175			}
176
177			sub DESTROY {
178	root	1.56	#my $self = shift;
179	root	1.13	$::conns--;
180	root	1.1	}
181
182			sub slog {
183	root	1.4	my $self = shift;
184	root	1.50	main::slog($_[0], "$self->{remote_id}> $_[1]");
185	root	1.1	}
186
187	root	1.4	sub response {
188	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
189	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
190	root	1.1
191	root	1.46	if (exists $hdr->{Connection}) {
192			if ($hdr->{Connection} =~ /close/) {
193			$self->{h}{connection} = "close"
194			}
195			} else {
196			if ($self->{version} < 1.1) {
197			if ($self->{h}{connection} =~ /keep-alive/i) {
198			$hdr->{Connection} = "Keep-Alive";
199			} else {
200			$self->{h}{connection} = "close"
201			}
202			}
203			}
204	root	1.28
205	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
206	root	1.1
207			while (my ($h, $v) = each %$hdr) {
208			$res .= "$h: $v\015\012"
209			}
210	root	1.10	$res .= "\015\012";
211	root	1.4
212	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
213	root	1.1
214	root	1.47	my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $NOW).
215	root	1.50	" $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.
216			" \"$self->{h}{referer}\"\n";
217	root	1.27
218			print $accesslog $log if $accesslog;
219			print STDERR $log;
220	root	1.2
221	root	1.11	$self->{written} +=
222			print {$self->{fh}} $res;
223	root	1.1	}
224
225			sub err {
226			my $self = shift;
227			my ($code, $msg, $hdr, $content) = @_;
228
229			unless (defined $content) {
230	root	1.35	$content = "$code $msg\n";
231	root	1.1	$hdr->{"Content-Type"} = "text/plain";
232			$hdr->{"Content-Length"} = length $content;
233			}
234	root	1.17	$hdr->{"Connection"} = "close";
235	root	1.1
236	root	1.4	$self->response($code, $msg, $hdr, $content);
237	root	1.1
238			die bless {}, err::;
239			}
240
241			sub handle {
242			my $self = shift;
243			my $fh = $self->{fh};
244
245	root	1.29	my $host;
246
247	root	1.17	$fh->timeout($::REQ_TIMEOUT);
248			while() {
249			$self->{reqs}++;
250	root	1.1
251			# read request and parse first line
252			my $req = $fh->readline("\015\012\015\012");
253
254	root	1.17	unless (defined $req) {
255			if (exists $self->{version}) {
256			last;
257			} else {
258			$self->err(408, "request timeout");
259			}
260			}
261
262			$self->{h} = {};
263	root	1.1
264	root	1.17	$fh->timeout($::RES_TIMEOUT);
265	root	1.3
266	root	1.1	$req =~ /^(?:\015\012)?
267			(GET\|HEAD) \040+
268			([^\040]+) \040+
269			HTTP\/([0-9]+\.[0-9]+)
270			\015\012/gx
271	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
272	root	1.1
273			$self->{method} = $1;
274			$self->{uri} = $2;
275	root	1.17	$self->{version} = $3;
276
277	root	1.20	$3 =~ /^1\./
278	root	1.17	or $self->err(506, "http protocol version $3 not supported");
279	root	1.1
280			# parse headers
281			{
282			my (%hdr, $h, $v);
283
284			$hdr{lc $1} .= ",$2"
285			while $req =~ /\G
286			([^:\000-\040]+):
287			[\008\040]*
288			((?: [^\015\012]+ \| \015\012[\008\040] )*)
289			\015\012
290			/gxc;
291
292			$req =~ /\G\015\012$/
293			or $self->err(400, "bad request");
294
295			$self->{h}{$h} = substr $v, 1
296			while ($h, $v) = each %hdr;
297			}
298
299	root	1.36	# remote id should be unique per user
300			my $id = $self->{remote_addr};
301
302			if (exists $self->{h}{"client-ip"}) {
303			$id .= "[".$self->{h}{"client-ip"}."]";
304			} elsif (exists $self->{h}{"x-forwarded-for"}) {
305			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
306			}
307
308			$self->{remote_id} = $id;
309
310	root	1.56	weaken (local $conn{$id}{$self*1} = $self);
311
312	root	1.36	if ($blocked{$id}) {
313	root	1.56	$self->err_blocked
314			if $blocked{$id}[0] > $::NOW;
315	root	1.36
316			delete $blocked{$id};
317			}
318
319	root	1.29	# find out server name and port
320			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
321			$host = $1;
322			} else {
323			$host = $self->{h}{host};
324			}
325
326			if (defined $host) {
327			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
328			} else {
329			($self->{server_port}, $host)
330	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
331	root	1.29	or $self->err(500, "unable to get socket name");
332			$host = inet_ntoa $host;
333			}
334
335			$self->{server_name} = $host;
336
337	root	1.56	weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);
338	root	1.1
339	root	1.24	eval {
340			$self->map_uri;
341			$self->respond;
342			};
343
344			die if $@ && !ref $@;
345	root	1.17
346	root	1.56	last if $self->{h}{connection} =~ /close/i;
347	root	1.17
348	root	1.44	$httpevent->broadcast;
349
350	root	1.17	$fh->timeout($::PER_TIMEOUT);
351			}
352	root	1.1	}
353
354	root	1.56	sub block {
355			my $self = shift;
356
357			$blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
358			$self->slog(2, "blocked ip $self->{remote_id}");
359			$self->err_blocked;
360			}
361
362	root	1.1	# uri => path mapping
363			sub map_uri {
364			my $self = shift;
365	root	1.29	my $host = $self->{server_name};
366	root	1.1	my $uri = $self->{uri};
367
368			# some massaging, also makes it more secure
369			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
370			$uri =~ s%//+%/%g;
371			$uri =~ s%/\.(?=/\|$)%%g;
372			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
373
374			$uri =~ m%^/?\.\.(?=/\|$)%
375			and $self->err(400, "bad request");
376
377			$self->{name} = $uri;
378
379			# now do the path mapping
380			$self->{path} = "$::DOCROOT/$host$uri";
381	root	1.7
382			$self->access_check;
383	root	1.1	}
384
385			sub _cgi {
386			my $self = shift;
387			my $path = shift;
388			my $fh;
389
390			# no two-way xxx supported
391			if (0 == fork) {
392			open STDOUT, ">&".fileno($self->{fh});
393			if (chdir $::DOCROOT) {
394			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
395	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
396			$ENV{HTTP_PORT} = $self->{server_port};
397	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
398	root	1.10	exec $path;
399	root	1.1	}
400			Coro::State::_exit(0);
401			} else {
402	root	1.29	die;
403	root	1.1	}
404			}
405
406	root	1.29	sub server_hostport {
407			$_[0]{server_port} == 80
408			? $_[0]{server_name}
409			: "$_[0]{server_name}:$_[0]{server_port}";
410			}
411
412	root	1.1	sub respond {
413			my $self = shift;
414			my $path = $self->{path};
415
416	root	1.49	if ($self->{name} =~ s%^/internal/([^/]+)%%) {
417			if ($::internal{$1}) {
418			$::internal{$1}->($self);
419			} else {
420			$self->err(404, "not found");
421			}
422			} else {
423	root	1.1
424	root	1.49	stat $path
425			or $self->err(404, "not found");
426	root	1.10
427	root	1.49	$self->{stat} = [stat _];
428	root	1.1
429	root	1.49	# idiotic netscape sends idiotic headers AGAIN
430			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
431			? str2time $1 : 0;
432
433			if (-d _ && -r _) {
434			# directory
435			if ($path !~ /\/$/) {
436			# create a redirect to get the trailing "/"
437			# we don't try to avoid the :80
438			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
439	root	1.25	} else {
440	root	1.49	$ims < $self->{stat}[9]
441			or $self->err(304, "not modified");
442
443			if (-r "$path/index.html") {
444			# replace directory "size" by index.html filesize
445	root	1.55	$self->{stat} = [stat ($self->{path} .= "/index.html")];
446	root	1.52	$self->handle_file($queue_index);
447	root	1.49	} else {
448			$self->handle_dir;
449			}
450	root	1.1	}
451	root	1.49	} elsif (-f _ && -r _) {
452			-x _ and $self->err(403, "forbidden");
453	root	1.56
454	root	1.58	if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
455	root	1.56	my $timeout = $::NOW + 10;
456	root	1.58	while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
457	root	1.56	if ($timeout < $::NOW) {
458			$self->block($::BLOCKTIME, "too many connections");
459			} else {
460			$httpevent->wait;
461			}
462			}
463			}
464
465			$self->handle_file($queue_file);
466	root	1.49	} else {
467			$self->err(404, "not found");
468	root	1.1	}
469			}
470			}
471
472			sub handle_dir {
473			my $self = shift;
474	root	1.10	my $idx = $self->diridx;
475
476			$self->response(200, "ok",
477			{
478			"Content-Type" => "text/html",
479			"Content-Length" => length $idx,
480	root	1.55	"Last-Modified" => time2str ($self->{stat}[9]),
481	root	1.10	},
482			$idx);
483	root	1.1	}
484
485			sub handle_file {
486	root	1.52	my ($self, $queue) = @_;
487	root	1.34	my $length = $self->{stat}[7];
488	root	1.1	my $hdr = {
489			"Last-Modified" => time2str ((stat _)[9]),
490			};
491
492			my @code = (200, "ok");
493			my ($l, $h);
494
495			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
496			for (split /,/, $1) {
497			if (/^-(\d+)$/) {
498			($l, $h) = ($length - $1, $length - 1);
499			} elsif (/^(\d+)-(\d*)$/) {
500			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
501			} else {
502			($l, $h) = (0, $length - 1);
503			goto ignore;
504			}
505	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
506	root	1.1	}
507			$hdr->{"Content-Range"} = "bytes */$length";
508	root	1.24	$hdr->{"Content-Length"} = $length;
509			$self->err(416, "not satisfiable", $hdr, "");
510	root	1.1
511			satisfiable:
512	root	1.4	# check for segmented downloads
513	root	1.10	if ($l && $::NO_SEGMENTED) {
514	root	1.56	my $timeout = $::NOW + 15;
515	root	1.58	while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
516	root	1.56	if ($timeout <= $::NOW) {
517			$self->block($::BLOCKTIME, "segmented downloads are forbidden");
518			#$self->err_segmented_download;
519	root	1.29	} else {
520	root	1.46	$httpevent->wait;
521	root	1.29	}
522	root	1.4	}
523			}
524
525	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
526			@code = (206, "partial content");
527			$length = $h - $l + 1;
528
529			ignore:
530			} else {
531			($l, $h) = (0, $length - 1);
532			}
533
534	root	1.9	$self->{path} =~ /\.([^.]+)$/;
535			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
536	root	1.1	$hdr->{"Content-Length"} = $length;
537
538	root	1.4	$self->response(@code, $hdr, "");
539	root	1.1
540			if ($self->{method} eq "GET") {
541	root	1.32	$self->{time} = $::NOW;
542
543	root	1.49	my $current = $Coro::current;
544	root	1.35
545	root	1.49	my ($fh, $buf, $r);
546	root	1.32
547	root	1.1	open $fh, "<", $self->{path}
548			or die "$self->{path}: late open failure ($!)";
549
550			$h -= $l - 1;
551
552	root	1.49	if (0) { # !AIO
553	root	1.19	if ($l) {
554			sysseek $fh, $l, 0;
555			}
556			}
557	root	1.48
558	root	1.56	my $transfer = $queue->start_transfer($h);
559	root	1.51	my $locked;
560	root	1.48	my $bufsize = $::WAIT_BUFSIZE; # initial buffer size
561	root	1.19
562	root	1.1	while ($h > 0) {
563	root	1.51	unless ($locked) {
564			if ($locked \|\|= $transfer->try($::WAIT_INTERVAL)) {
565	root	1.48	$bufsize = $::BUFSIZE;
566			$self->{time} = $::NOW;
567			}
568	root	1.56	}
569
570			if ($blocked{$self->{remote_id}}) {
571			$self->{h}{connection} = "close";
572	root	1.59	die bless {}, err::;
573	root	1.48	}
574
575	root	1.49	if (0) { # !AIO
576	root	1.48	sysread $fh, $buf, $h > $bufsize ? $bufsize : $h
577	root	1.19	or last;
578			} else {
579	root	1.48	aio_read($fh, $l, ($h > $bufsize ? $bufsize : $h),
580	root	1.19	$buf, 0, sub {
581			$r = $_[0];
582	root	1.37	Coro::ready($current);
583	root	1.19	});
584			&Coro::schedule;
585			last unless $r;
586			}
587	root	1.37	my $w = syswrite $self->{fh}, $buf
588	root	1.1	or last;
589	root	1.11	$::written += $w;
590			$self->{written} += $w;
591	root	1.16	$l += $r;
592	root	1.1	}
593	root	1.32
594			close $fh;
595	root	1.1	}
596	root	1.7	}
597
598	root	1.2	1;