Coro/myhttpd/httpd.pl

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

use HTTP::Date;
use POSIX ();

use Compress::Zlib ();

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;

our $tbf_top     = new tbf rate => 200000;

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";
   my $GZ = "";

   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"
         }
      }
   }

   if ($self->{method} ne "HEAD"
       && $self->{h}{"accept-encoding"} =~ /\bgzip\b/
       && 400 < length $content
       && $hdr->{"Content-Length"} == length $content
       && !exists $hdr->{"Content-Encoding"}
   ) {
      my $orig = length $content;
      $hdr->{"Content-Encoding"} = "gzip";
      $content = Compress::Zlib::memGzip(\$content);
      $hdr->{"Content-Length"} = length $content;
      $GZ = sprintf "GZ%02d", 100 - 100*((length $content) / $orig);
   }

   $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"}.$GZ.
             " \"$self->{h}{referer}\"\n";

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

   $tbf_top->request(length $res, 1e6);
   $self->{written} += print {$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]+):
                  [\011\040]*
                  ((?: [^\015\012]+ | \015\012[\011\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, $tbf_top);
            } 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, $tbf_top);
      } 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, $tbf) = @_;
   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;
         }

         $tbf->request(length $buf);
         my $w = syswrite $self->{fh}, $buf
            or last;
         $::written += $w;
         $self->{written} += $w;
         $l += $r;
      }

      close $fh;
   }
}

1;
Revision:	1.67
Committed:	Sun May 19 21:00:47 2002 UTC (22 years, 2 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.66:	+9 -5 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	1.63	use Compress::Zlib ();
11
12	root	1.1	no utf8;
13			use bytes;
14
15			# at least on my machine, this thingy serves files
16			# quite a bit faster than apache, ;)
17			# and quite a bit slower than thttpd :(
18
19			$SIG{PIPE} = 'IGNORE';
20	root	1.27
21			our $accesslog;
22	root	1.56	our $errorlog;
23
24			our $NOW;
25			our $HTTP_NOW;
26
27			Event->timer(interval => 1, hard => 1, cb => sub {
28			$NOW = time;
29			$HTTP_NOW = time2str $NOW;
30			})->now;
31
32			if ($ERROR_LOG) {
33			use IO::Handle;
34			open $errorlog, ">>$ERROR_LOG"
35			or die "$ERROR_LOG: $!";
36			$errorlog->autoflush(1);
37			}
38	root	1.27
39			if ($ACCESS_LOG) {
40			use IO::Handle;
41			open $accesslog, ">>$ACCESS_LOG"
42			or die "$ACCESS_LOG: $!";
43			$accesslog->autoflush(1);
44			}
45
46	root	1.1	sub slog {
47			my $level = shift;
48			my $format = shift;
49	root	1.56	my $NOW = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW);
50			printf "$NOW: $format\n", @_;
51			printf $errorlog "$NOW: $format\n", @_ if $errorlog;
52	root	1.1	}
53
54	root	1.32	our $connections = new Coro::Semaphore $MAX_CONNECTS \|\| 250;
55	root	1.44	our $httpevent = new Coro::Signal;
56	root	1.34
57	root	1.63	our $queue_file = new transferqueue $MAX_TRANSFERS;
58			our $queue_index = new transferqueue 10;
59	root	1.62
60	root	1.67	our $tbf_top = new tbf rate => 200000;
61
62	root	1.6	my @newcons;
63	root	1.1	my @pool;
64
65	root	1.2	# one "execution thread"
66	root	1.1	sub handler {
67			while () {
68	root	1.38	if (@newcons) {
69	root	1.1	eval {
70	root	1.38	conn->new(@{pop @newcons})->handle;
71	root	1.1	};
72			slog 1, "$@" if $@ && !ref $@;
73	root	1.56
74			$httpevent->broadcast; # only for testing, but doesn't matter much
75
76	root	1.1	$connections->up;
77			} else {
78			last if @pool >= $MAX_POOL;
79			push @pool, $Coro::current;
80			schedule;
81			}
82			}
83			}
84
85	root	1.40	sub listen_on {
86			my $listen = $_[0];
87
88			push @listen_sockets, $listen;
89
90			# the "main thread"
91			async {
92			slog 1, "accepting connections";
93			while () {
94			$connections->down;
95			push @newcons, [$listen->accept];
96			#slog 3, "accepted @$connections ".scalar(@pool);
97			if (@pool) {
98			(pop @pool)->ready;
99			} else {
100			async \&handler;
101			}
102
103			}
104			};
105			}
106
107	root	1.4	my $http_port = new Coro::Socket
108			LocalAddr => $SERVER_HOST,
109			LocalPort => $SERVER_PORT,
110			ReuseAddr => 1,
111	root	1.13	Listen => 50,
112	root	1.4	or die "unable to start server";
113
114	root	1.40	listen_on $http_port;
115
116	root	1.41	if ($SERVER_PORT2) {
117			my $http_port = new Coro::Socket
118			LocalAddr => $SERVER_HOST,
119			LocalPort => $SERVER_PORT2,
120			ReuseAddr => 1,
121			Listen => 50,
122			or die "unable to start server";
123	root	1.40
124	root	1.41	listen_on $http_port;
125			}
126	root	1.4
127	root	1.1	package conn;
128
129			use Socket;
130			use HTTP::Date;
131	root	1.2	use Convert::Scalar 'weaken';
132	root	1.16	use Linux::AIO;
133
134			Linux::AIO::min_parallel $::AIO_PARALLEL;
135
136			Event->io(fd => Linux::AIO::poll_fileno,
137	root	1.17	poll => 'r', async => 1,
138	root	1.21	cb => \&Linux::AIO::poll_cb);
139	root	1.16
140	root	1.26	our %conn; # $conn{ip}{self} => connobj
141			our %uri; # $uri{ip}{uri}{self}
142	root	1.3	our %blocked;
143	root	1.9	our %mimetype;
144
145			sub read_mimetypes {
146			local *M;
147	root	1.10	if (open M, "<mime_types") {
148	root	1.9	while (<M>) {
149			if (/^([^#]\S+)\t+(\S+)$/) {
150			$mimetype{lc $1} = $2;
151			}
152			}
153			} else {
154	root	1.10	print "cannot open mime_types\n";
155	root	1.9	}
156			}
157	root	1.1
158	root	1.10	read_mimetypes;
159
160	root	1.1	sub new {
161			my $class = shift;
162	root	1.42	my $fh = shift;
163	root	1.6	my $peername = shift;
164	root	1.2	my $self = bless { fh => $fh }, $class;
165	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
166			or $self->err(500, "unable to decode peername");
167	root	1.7
168	root	1.50	$self->{remote_addr} =
169			$self->{remote_id} = inet_ntoa $iaddr;
170	root	1.60
171	root	1.11	$self->{time} = $::NOW;
172	root	1.2
173	root	1.49	weaken ($Coro::current->{conn} = $self);
174
175	root	1.13	$::conns++;
176	root	1.53	$::maxconns = $::conns if $::conns > $::maxconns;
177	root	1.13
178	root	1.2	$self;
179			}
180
181			sub DESTROY {
182	root	1.56	#my $self = shift;
183	root	1.13	$::conns--;
184	root	1.1	}
185
186			sub slog {
187	root	1.4	my $self = shift;
188	root	1.50	main::slog($_[0], "$self->{remote_id}> $_[1]");
189	root	1.1	}
190
191	root	1.4	sub response {
192	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
193	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
194	root	1.63	my $GZ = "";
195	root	1.1
196	root	1.46	if (exists $hdr->{Connection}) {
197			if ($hdr->{Connection} =~ /close/) {
198			$self->{h}{connection} = "close"
199			}
200			} else {
201			if ($self->{version} < 1.1) {
202			if ($self->{h}{connection} =~ /keep-alive/i) {
203			$hdr->{Connection} = "Keep-Alive";
204			} else {
205			$self->{h}{connection} = "close"
206			}
207			}
208			}
209	root	1.28
210	root	1.63	if ($self->{method} ne "HEAD"
211			&& $self->{h}{"accept-encoding"} =~ /\bgzip\b/
212	root	1.64	&& 400 < length $content
213	root	1.63	&& $hdr->{"Content-Length"} == length $content
214			&& !exists $hdr->{"Content-Encoding"}
215			) {
216			my $orig = length $content;
217			$hdr->{"Content-Encoding"} = "gzip";
218			$content = Compress::Zlib::memGzip(\$content);
219			$hdr->{"Content-Length"} = length $content;
220			$GZ = sprintf "GZ%02d", 100 - 100*((length $content) / $orig);
221			}
222
223	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
224	root	1.1
225			while (my ($h, $v) = each %$hdr) {
226			$res .= "$h: $v\015\012"
227			}
228	root	1.10	$res .= "\015\012";
229	root	1.4
230	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
231	root	1.1
232	root	1.65	my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW).
233	root	1.63	" $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.$GZ.
234	root	1.50	" \"$self->{h}{referer}\"\n";
235	root	1.27
236	root	1.65	print $::accesslog $log if $::accesslog;
237	root	1.27	print STDERR $log;
238	root	1.2
239	root	1.67	$tbf_top->request(length $res, 1e6);
240			$self->{written} += print {$self->{fh}} $res;
241	root	1.1	}
242
243			sub err {
244			my $self = shift;
245			my ($code, $msg, $hdr, $content) = @_;
246
247			unless (defined $content) {
248	root	1.35	$content = "$code $msg\n";
249	root	1.1	$hdr->{"Content-Type"} = "text/plain";
250			$hdr->{"Content-Length"} = length $content;
251			}
252	root	1.17	$hdr->{"Connection"} = "close";
253	root	1.1
254	root	1.4	$self->response($code, $msg, $hdr, $content);
255	root	1.1
256			die bless {}, err::;
257			}
258
259			sub handle {
260			my $self = shift;
261			my $fh = $self->{fh};
262
263	root	1.29	my $host;
264
265	root	1.17	$fh->timeout($::REQ_TIMEOUT);
266			while() {
267			$self->{reqs}++;
268	root	1.1
269			# read request and parse first line
270			my $req = $fh->readline("\015\012\015\012");
271
272	root	1.17	unless (defined $req) {
273			if (exists $self->{version}) {
274			last;
275			} else {
276			$self->err(408, "request timeout");
277			}
278			}
279
280			$self->{h} = {};
281	root	1.1
282	root	1.17	$fh->timeout($::RES_TIMEOUT);
283	root	1.3
284	root	1.1	$req =~ /^(?:\015\012)?
285			(GET\|HEAD) \040+
286			([^\040]+) \040+
287			HTTP\/([0-9]+\.[0-9]+)
288			\015\012/gx
289	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
290	root	1.1
291			$self->{method} = $1;
292			$self->{uri} = $2;
293	root	1.17	$self->{version} = $3;
294
295	root	1.20	$3 =~ /^1\./
296	root	1.17	or $self->err(506, "http protocol version $3 not supported");
297	root	1.1
298			# parse headers
299			{
300			my (%hdr, $h, $v);
301
302			$hdr{lc $1} .= ",$2"
303			while $req =~ /\G
304			([^:\000-\040]+):
305	root	1.66	[\011\040]*
306			((?: [^\015\012]+ \| \015\012[\011\040] )*)
307	root	1.1	\015\012
308			/gxc;
309
310			$req =~ /\G\015\012$/
311			or $self->err(400, "bad request");
312
313			$self->{h}{$h} = substr $v, 1
314			while ($h, $v) = each %hdr;
315			}
316
317	root	1.36	# remote id should be unique per user
318			my $id = $self->{remote_addr};
319
320			if (exists $self->{h}{"client-ip"}) {
321			$id .= "[".$self->{h}{"client-ip"}."]";
322			} elsif (exists $self->{h}{"x-forwarded-for"}) {
323			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
324			}
325
326			$self->{remote_id} = $id;
327
328	root	1.56	weaken (local $conn{$id}{$self*1} = $self);
329
330	root	1.36	if ($blocked{$id}) {
331	root	1.56	$self->err_blocked
332			if $blocked{$id}[0] > $::NOW;
333	root	1.36
334			delete $blocked{$id};
335			}
336
337	root	1.29	# find out server name and port
338			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
339			$host = $1;
340			} else {
341			$host = $self->{h}{host};
342			}
343
344			if (defined $host) {
345			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
346			} else {
347			($self->{server_port}, $host)
348	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
349	root	1.29	or $self->err(500, "unable to get socket name");
350			$host = inet_ntoa $host;
351			}
352
353			$self->{server_name} = $host;
354
355	root	1.56	weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);
356	root	1.1
357	root	1.24	eval {
358			$self->map_uri;
359			$self->respond;
360			};
361
362			die if $@ && !ref $@;
363	root	1.17
364	root	1.56	last if $self->{h}{connection} =~ /close/i;
365	root	1.17
366	root	1.44	$httpevent->broadcast;
367
368	root	1.17	$fh->timeout($::PER_TIMEOUT);
369			}
370	root	1.1	}
371
372	root	1.56	sub block {
373			my $self = shift;
374
375			$blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
376			$self->slog(2, "blocked ip $self->{remote_id}");
377			$self->err_blocked;
378			}
379
380	root	1.1	# uri => path mapping
381			sub map_uri {
382			my $self = shift;
383	root	1.29	my $host = $self->{server_name};
384	root	1.1	my $uri = $self->{uri};
385
386			# some massaging, also makes it more secure
387			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
388			$uri =~ s%//+%/%g;
389			$uri =~ s%/\.(?=/\|$)%%g;
390			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
391
392			$uri =~ m%^/?\.\.(?=/\|$)%
393			and $self->err(400, "bad request");
394
395			$self->{name} = $uri;
396
397			# now do the path mapping
398			$self->{path} = "$::DOCROOT/$host$uri";
399	root	1.7
400			$self->access_check;
401	root	1.1	}
402
403			sub _cgi {
404			my $self = shift;
405			my $path = shift;
406			my $fh;
407
408			# no two-way xxx supported
409			if (0 == fork) {
410			open STDOUT, ">&".fileno($self->{fh});
411			if (chdir $::DOCROOT) {
412			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
413	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
414			$ENV{HTTP_PORT} = $self->{server_port};
415	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
416	root	1.10	exec $path;
417	root	1.1	}
418			Coro::State::_exit(0);
419			} else {
420	root	1.29	die;
421	root	1.1	}
422			}
423
424	root	1.29	sub server_hostport {
425			$_[0]{server_port} == 80
426			? $_[0]{server_name}
427			: "$_[0]{server_name}:$_[0]{server_port}";
428			}
429
430	root	1.1	sub respond {
431			my $self = shift;
432			my $path = $self->{path};
433
434	root	1.49	if ($self->{name} =~ s%^/internal/([^/]+)%%) {
435			if ($::internal{$1}) {
436			$::internal{$1}->($self);
437			} else {
438			$self->err(404, "not found");
439			}
440			} else {
441	root	1.1
442	root	1.49	stat $path
443			or $self->err(404, "not found");
444	root	1.10
445	root	1.49	$self->{stat} = [stat _];
446	root	1.1
447	root	1.49	# idiotic netscape sends idiotic headers AGAIN
448			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
449			? str2time $1 : 0;
450
451			if (-d _ && -r _) {
452			# directory
453			if ($path !~ /\/$/) {
454			# create a redirect to get the trailing "/"
455			# we don't try to avoid the :80
456			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
457	root	1.25	} else {
458	root	1.49	$ims < $self->{stat}[9]
459			or $self->err(304, "not modified");
460
461			if (-r "$path/index.html") {
462			# replace directory "size" by index.html filesize
463	root	1.55	$self->{stat} = [stat ($self->{path} .= "/index.html")];
464	root	1.67	$self->handle_file($queue_index, $tbf_top);
465	root	1.49	} else {
466			$self->handle_dir;
467			}
468	root	1.1	}
469	root	1.49	} elsif (-f _ && -r _) {
470			-x _ and $self->err(403, "forbidden");
471	root	1.56
472	root	1.58	if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
473	root	1.56	my $timeout = $::NOW + 10;
474	root	1.58	while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
475	root	1.56	if ($timeout < $::NOW) {
476			$self->block($::BLOCKTIME, "too many connections");
477			} else {
478			$httpevent->wait;
479			}
480			}
481			}
482
483	root	1.67	$self->handle_file($queue_file, $tbf_top);
484	root	1.49	} else {
485			$self->err(404, "not found");
486	root	1.1	}
487			}
488			}
489
490			sub handle_dir {
491			my $self = shift;
492	root	1.10	my $idx = $self->diridx;
493
494			$self->response(200, "ok",
495			{
496			"Content-Type" => "text/html",
497			"Content-Length" => length $idx,
498	root	1.55	"Last-Modified" => time2str ($self->{stat}[9]),
499	root	1.10	},
500			$idx);
501	root	1.1	}
502
503			sub handle_file {
504	root	1.67	my ($self, $queue, $tbf) = @_;
505	root	1.34	my $length = $self->{stat}[7];
506	root	1.1	my $hdr = {
507			"Last-Modified" => time2str ((stat _)[9]),
508			};
509
510			my @code = (200, "ok");
511			my ($l, $h);
512
513			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
514			for (split /,/, $1) {
515			if (/^-(\d+)$/) {
516			($l, $h) = ($length - $1, $length - 1);
517			} elsif (/^(\d+)-(\d*)$/) {
518			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
519			} else {
520			($l, $h) = (0, $length - 1);
521			goto ignore;
522			}
523	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
524	root	1.1	}
525			$hdr->{"Content-Range"} = "bytes */$length";
526	root	1.24	$hdr->{"Content-Length"} = $length;
527			$self->err(416, "not satisfiable", $hdr, "");
528	root	1.1
529			satisfiable:
530	root	1.4	# check for segmented downloads
531	root	1.10	if ($l && $::NO_SEGMENTED) {
532	root	1.56	my $timeout = $::NOW + 15;
533	root	1.58	while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
534	root	1.56	if ($timeout <= $::NOW) {
535			$self->block($::BLOCKTIME, "segmented downloads are forbidden");
536			#$self->err_segmented_download;
537	root	1.29	} else {
538	root	1.46	$httpevent->wait;
539	root	1.29	}
540	root	1.4	}
541			}
542
543	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
544			@code = (206, "partial content");
545			$length = $h - $l + 1;
546
547			ignore:
548			} else {
549			($l, $h) = (0, $length - 1);
550			}
551
552	root	1.9	$self->{path} =~ /\.([^.]+)$/;
553			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
554	root	1.1	$hdr->{"Content-Length"} = $length;
555
556	root	1.4	$self->response(@code, $hdr, "");
557	root	1.1
558			if ($self->{method} eq "GET") {
559	root	1.32	$self->{time} = $::NOW;
560
561	root	1.49	my $current = $Coro::current;
562	root	1.35
563	root	1.49	my ($fh, $buf, $r);
564	root	1.32
565	root	1.1	open $fh, "<", $self->{path}
566			or die "$self->{path}: late open failure ($!)";
567
568			$h -= $l - 1;
569
570	root	1.49	if (0) { # !AIO
571	root	1.19	if ($l) {
572			sysseek $fh, $l, 0;
573			}
574			}
575	root	1.48
576	root	1.56	my $transfer = $queue->start_transfer($h);
577	root	1.51	my $locked;
578	root	1.48	my $bufsize = $::WAIT_BUFSIZE; # initial buffer size
579	root	1.19
580	root	1.1	while ($h > 0) {
581	root	1.51	unless ($locked) {
582			if ($locked \|\|= $transfer->try($::WAIT_INTERVAL)) {
583	root	1.48	$bufsize = $::BUFSIZE;
584			$self->{time} = $::NOW;
585			}
586	root	1.56	}
587
588			if ($blocked{$self->{remote_id}}) {
589			$self->{h}{connection} = "close";
590	root	1.59	die bless {}, err::;
591	root	1.48	}
592
593	root	1.49	if (0) { # !AIO
594	root	1.48	sysread $fh, $buf, $h > $bufsize ? $bufsize : $h
595	root	1.19	or last;
596			} else {
597	root	1.48	aio_read($fh, $l, ($h > $bufsize ? $bufsize : $h),
598	root	1.19	$buf, 0, sub {
599			$r = $_[0];
600	root	1.37	Coro::ready($current);
601	root	1.19	});
602			&Coro::schedule;
603			last unless $r;
604			}
605	root	1.67
606			$tbf->request(length $buf);
607	root	1.37	my $w = syswrite $self->{fh}, $buf
608	root	1.1	or last;
609	root	1.11	$::written += $w;
610			$self->{written} += $w;
611	root	1.16	$l += $r;
612	root	1.1	}
613	root	1.32
614			close $fh;
615	root	1.1	}
616	root	1.7	}
617
618	root	1.2	1;