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 => 100000;

my $unused_bytes = 0;
my $unused_last  = time;

sub unused_bandwidth {
   $unused_bytes += $_[0];
   if ($unused_last < $NOW - 30 && $unused_bytes / ($NOW - $unused_last) > 50000) {
      $unused_last = $NOW;
      $unused_bytes = 0;
      $queue_file->force_wake_next;
      slog 1, "forced filetransfer due to unused bandwidth";
   }
}

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";
   $res .= "Server: $::NAME\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;
      $self->{written} = 0;

      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;
               $self->{written} = 0;
            }
         }

         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:	1.71
Committed:	Mon Jul 29 21:41:54 2002 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.70:	+3 -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	1.63	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	1.70	our $tbf_top = new tbf rate => 100000;
61	root	1.67
62	root	1.68	my $unused_bytes = 0;
63			my $unused_last = time;
64
65			sub unused_bandwidth {
66			$unused_bytes += $_[0];
67			if ($unused_last < $NOW - 30 && $unused_bytes / ($NOW - $unused_last) > 50000) {
68			$unused_last = $NOW;
69			$unused_bytes = 0;
70			$queue_file->force_wake_next;
71			slog 1, "forced filetransfer due to unused bandwidth";
72			}
73			}
74
75	root	1.6	my @newcons;
76	root	1.1	my @pool;
77
78	root	1.2	# one "execution thread"
79	root	1.1	sub handler {
80			while () {
81	root	1.38	if (@newcons) {
82	root	1.1	eval {
83	root	1.38	conn->new(@{pop @newcons})->handle;
84	root	1.1	};
85			slog 1, "$@" if $@ && !ref $@;
86	root	1.56
87			$httpevent->broadcast; # only for testing, but doesn't matter much
88
89	root	1.1	$connections->up;
90			} else {
91			last if @pool >= $MAX_POOL;
92			push @pool, $Coro::current;
93			schedule;
94			}
95			}
96			}
97
98	root	1.40	sub listen_on {
99			my $listen = $_[0];
100
101			push @listen_sockets, $listen;
102
103			# the "main thread"
104			async {
105			slog 1, "accepting connections";
106			while () {
107			$connections->down;
108			push @newcons, [$listen->accept];
109			#slog 3, "accepted @$connections ".scalar(@pool);
110			if (@pool) {
111			(pop @pool)->ready;
112			} else {
113			async \&handler;
114			}
115
116			}
117			};
118			}
119
120	root	1.4	my $http_port = new Coro::Socket
121			LocalAddr => $SERVER_HOST,
122			LocalPort => $SERVER_PORT,
123			ReuseAddr => 1,
124	root	1.13	Listen => 50,
125	root	1.4	or die "unable to start server";
126
127	root	1.40	listen_on $http_port;
128
129	root	1.41	if ($SERVER_PORT2) {
130			my $http_port = new Coro::Socket
131			LocalAddr => $SERVER_HOST,
132			LocalPort => $SERVER_PORT2,
133			ReuseAddr => 1,
134			Listen => 50,
135			or die "unable to start server";
136	root	1.40
137	root	1.41	listen_on $http_port;
138			}
139	root	1.4
140	root	1.1	package conn;
141
142			use Socket;
143			use HTTP::Date;
144	root	1.2	use Convert::Scalar 'weaken';
145	root	1.16	use Linux::AIO;
146
147			Linux::AIO::min_parallel $::AIO_PARALLEL;
148
149			Event->io(fd => Linux::AIO::poll_fileno,
150	root	1.17	poll => 'r', async => 1,
151	root	1.21	cb => \&Linux::AIO::poll_cb);
152	root	1.16
153	root	1.26	our %conn; # $conn{ip}{self} => connobj
154			our %uri; # $uri{ip}{uri}{self}
155	root	1.3	our %blocked;
156	root	1.9	our %mimetype;
157
158			sub read_mimetypes {
159			local *M;
160	root	1.10	if (open M, "<mime_types") {
161	root	1.9	while (<M>) {
162			if (/^([^#]\S+)\t+(\S+)$/) {
163			$mimetype{lc $1} = $2;
164			}
165			}
166			} else {
167	root	1.10	print "cannot open mime_types\n";
168	root	1.9	}
169			}
170	root	1.1
171	root	1.10	read_mimetypes;
172
173	root	1.1	sub new {
174			my $class = shift;
175	root	1.42	my $fh = shift;
176	root	1.6	my $peername = shift;
177	root	1.2	my $self = bless { fh => $fh }, $class;
178	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
179			or $self->err(500, "unable to decode peername");
180	root	1.7
181	root	1.50	$self->{remote_addr} =
182			$self->{remote_id} = inet_ntoa $iaddr;
183	root	1.60
184	root	1.11	$self->{time} = $::NOW;
185	root	1.2
186	root	1.49	weaken ($Coro::current->{conn} = $self);
187
188	root	1.13	$::conns++;
189	root	1.53	$::maxconns = $::conns if $::conns > $::maxconns;
190	root	1.13
191	root	1.2	$self;
192			}
193
194			sub DESTROY {
195	root	1.56	#my $self = shift;
196	root	1.13	$::conns--;
197	root	1.1	}
198
199			sub slog {
200	root	1.4	my $self = shift;
201	root	1.50	main::slog($_[0], "$self->{remote_id}> $_[1]");
202	root	1.1	}
203
204	root	1.4	sub response {
205	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
206	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
207	root	1.63	my $GZ = "";
208	root	1.1
209	root	1.46	if (exists $hdr->{Connection}) {
210			if ($hdr->{Connection} =~ /close/) {
211			$self->{h}{connection} = "close"
212			}
213			} else {
214			if ($self->{version} < 1.1) {
215			if ($self->{h}{connection} =~ /keep-alive/i) {
216			$hdr->{Connection} = "Keep-Alive";
217			} else {
218			$self->{h}{connection} = "close"
219			}
220			}
221			}
222	root	1.28
223	root	1.63	if ($self->{method} ne "HEAD"
224			&& $self->{h}{"accept-encoding"} =~ /\bgzip\b/
225	root	1.64	&& 400 < length $content
226	root	1.63	&& $hdr->{"Content-Length"} == length $content
227			&& !exists $hdr->{"Content-Encoding"}
228			) {
229			my $orig = length $content;
230			$hdr->{"Content-Encoding"} = "gzip";
231			$content = Compress::Zlib::memGzip(\$content);
232			$hdr->{"Content-Length"} = length $content;
233			$GZ = sprintf "GZ%02d", 100 - 100*((length $content) / $orig);
234			}
235
236	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
237	root	1.71	$res .= "Server: $::NAME\015\012";
238	root	1.1
239			while (my ($h, $v) = each %$hdr) {
240			$res .= "$h: $v\015\012"
241			}
242	root	1.10	$res .= "\015\012";
243	root	1.4
244	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
245	root	1.1
246	root	1.65	my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW).
247	root	1.63	" $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.$GZ.
248	root	1.50	" \"$self->{h}{referer}\"\n";
249	root	1.27
250	root	1.65	print $::accesslog $log if $::accesslog;
251	root	1.27	print STDERR $log;
252	root	1.2
253	root	1.67	$tbf_top->request(length $res, 1e6);
254			$self->{written} += print {$self->{fh}} $res;
255	root	1.1	}
256
257			sub err {
258			my $self = shift;
259			my ($code, $msg, $hdr, $content) = @_;
260
261			unless (defined $content) {
262	root	1.35	$content = "$code $msg\n";
263	root	1.1	$hdr->{"Content-Type"} = "text/plain";
264			$hdr->{"Content-Length"} = length $content;
265			}
266	root	1.17	$hdr->{"Connection"} = "close";
267	root	1.1
268	root	1.4	$self->response($code, $msg, $hdr, $content);
269	root	1.1
270			die bless {}, err::;
271			}
272
273			sub handle {
274			my $self = shift;
275			my $fh = $self->{fh};
276
277	root	1.29	my $host;
278
279	root	1.17	$fh->timeout($::REQ_TIMEOUT);
280			while() {
281			$self->{reqs}++;
282	root	1.1
283			# read request and parse first line
284			my $req = $fh->readline("\015\012\015\012");
285
286	root	1.17	unless (defined $req) {
287			if (exists $self->{version}) {
288			last;
289			} else {
290			$self->err(408, "request timeout");
291			}
292			}
293
294			$self->{h} = {};
295	root	1.1
296	root	1.17	$fh->timeout($::RES_TIMEOUT);
297	root	1.3
298	root	1.1	$req =~ /^(?:\015\012)?
299			(GET\|HEAD) \040+
300			([^\040]+) \040+
301			HTTP\/([0-9]+\.[0-9]+)
302			\015\012/gx
303	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
304	root	1.1
305			$self->{method} = $1;
306			$self->{uri} = $2;
307	root	1.17	$self->{version} = $3;
308
309	root	1.20	$3 =~ /^1\./
310	root	1.17	or $self->err(506, "http protocol version $3 not supported");
311	root	1.1
312			# parse headers
313			{
314			my (%hdr, $h, $v);
315
316			$hdr{lc $1} .= ",$2"
317			while $req =~ /\G
318			([^:\000-\040]+):
319	root	1.66	[\011\040]*
320			((?: [^\015\012]+ \| \015\012[\011\040] )*)
321	root	1.1	\015\012
322			/gxc;
323
324			$req =~ /\G\015\012$/
325			or $self->err(400, "bad request");
326
327			$self->{h}{$h} = substr $v, 1
328			while ($h, $v) = each %hdr;
329			}
330
331	root	1.36	# remote id should be unique per user
332			my $id = $self->{remote_addr};
333
334			if (exists $self->{h}{"client-ip"}) {
335			$id .= "[".$self->{h}{"client-ip"}."]";
336			} elsif (exists $self->{h}{"x-forwarded-for"}) {
337			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
338			}
339
340			$self->{remote_id} = $id;
341
342	root	1.56	weaken (local $conn{$id}{$self*1} = $self);
343
344	root	1.36	if ($blocked{$id}) {
345	root	1.56	$self->err_blocked
346			if $blocked{$id}[0] > $::NOW;
347	root	1.36
348			delete $blocked{$id};
349			}
350
351	root	1.29	# find out server name and port
352			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
353			$host = $1;
354			} else {
355			$host = $self->{h}{host};
356			}
357
358			if (defined $host) {
359			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
360			} else {
361			($self->{server_port}, $host)
362	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
363	root	1.29	or $self->err(500, "unable to get socket name");
364			$host = inet_ntoa $host;
365			}
366
367			$self->{server_name} = $host;
368
369	root	1.56	weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);
370	root	1.1
371	root	1.24	eval {
372			$self->map_uri;
373			$self->respond;
374			};
375
376			die if $@ && !ref $@;
377	root	1.17
378	root	1.56	last if $self->{h}{connection} =~ /close/i;
379	root	1.17
380	root	1.44	$httpevent->broadcast;
381
382	root	1.17	$fh->timeout($::PER_TIMEOUT);
383			}
384	root	1.1	}
385
386	root	1.56	sub block {
387			my $self = shift;
388
389			$blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
390			$self->slog(2, "blocked ip $self->{remote_id}");
391			$self->err_blocked;
392			}
393
394	root	1.1	# uri => path mapping
395			sub map_uri {
396			my $self = shift;
397	root	1.29	my $host = $self->{server_name};
398	root	1.1	my $uri = $self->{uri};
399
400			# some massaging, also makes it more secure
401			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
402			$uri =~ s%//+%/%g;
403			$uri =~ s%/\.(?=/\|$)%%g;
404			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
405
406			$uri =~ m%^/?\.\.(?=/\|$)%
407			and $self->err(400, "bad request");
408
409			$self->{name} = $uri;
410
411			# now do the path mapping
412			$self->{path} = "$::DOCROOT/$host$uri";
413	root	1.7
414			$self->access_check;
415	root	1.1	}
416
417			sub _cgi {
418			my $self = shift;
419			my $path = shift;
420			my $fh;
421
422			# no two-way xxx supported
423			if (0 == fork) {
424			open STDOUT, ">&".fileno($self->{fh});
425			if (chdir $::DOCROOT) {
426			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
427	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
428			$ENV{HTTP_PORT} = $self->{server_port};
429	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
430	root	1.10	exec $path;
431	root	1.1	}
432			Coro::State::_exit(0);
433			} else {
434	root	1.29	die;
435	root	1.1	}
436			}
437
438	root	1.29	sub server_hostport {
439			$_[0]{server_port} == 80
440			? $_[0]{server_name}
441			: "$_[0]{server_name}:$_[0]{server_port}";
442			}
443
444	root	1.1	sub respond {
445			my $self = shift;
446			my $path = $self->{path};
447
448	root	1.49	if ($self->{name} =~ s%^/internal/([^/]+)%%) {
449			if ($::internal{$1}) {
450			$::internal{$1}->($self);
451			} else {
452			$self->err(404, "not found");
453			}
454			} else {
455	root	1.1
456	root	1.49	stat $path
457			or $self->err(404, "not found");
458	root	1.10
459	root	1.49	$self->{stat} = [stat _];
460	root	1.1
461	root	1.49	# idiotic netscape sends idiotic headers AGAIN
462			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
463			? str2time $1 : 0;
464
465			if (-d _ && -r _) {
466			# directory
467			if ($path !~ /\/$/) {
468			# create a redirect to get the trailing "/"
469			# we don't try to avoid the :80
470			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
471	root	1.25	} else {
472	root	1.49	$ims < $self->{stat}[9]
473			or $self->err(304, "not modified");
474
475			if (-r "$path/index.html") {
476			# replace directory "size" by index.html filesize
477	root	1.55	$self->{stat} = [stat ($self->{path} .= "/index.html")];
478	root	1.67	$self->handle_file($queue_index, $tbf_top);
479	root	1.49	} else {
480			$self->handle_dir;
481			}
482	root	1.1	}
483	root	1.49	} elsif (-f _ && -r _) {
484			-x _ and $self->err(403, "forbidden");
485	root	1.56
486	root	1.58	if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
487	root	1.56	my $timeout = $::NOW + 10;
488	root	1.58	while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
489	root	1.56	if ($timeout < $::NOW) {
490			$self->block($::BLOCKTIME, "too many connections");
491			} else {
492			$httpevent->wait;
493			}
494			}
495			}
496
497	root	1.67	$self->handle_file($queue_file, $tbf_top);
498	root	1.49	} else {
499			$self->err(404, "not found");
500	root	1.1	}
501			}
502			}
503
504			sub handle_dir {
505			my $self = shift;
506	root	1.10	my $idx = $self->diridx;
507
508			$self->response(200, "ok",
509			{
510			"Content-Type" => "text/html",
511			"Content-Length" => length $idx,
512	root	1.55	"Last-Modified" => time2str ($self->{stat}[9]),
513	root	1.10	},
514			$idx);
515	root	1.1	}
516
517			sub handle_file {
518	root	1.67	my ($self, $queue, $tbf) = @_;
519	root	1.34	my $length = $self->{stat}[7];
520	root	1.1	my $hdr = {
521			"Last-Modified" => time2str ((stat _)[9]),
522			};
523
524			my @code = (200, "ok");
525			my ($l, $h);
526
527			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
528			for (split /,/, $1) {
529			if (/^-(\d+)$/) {
530			($l, $h) = ($length - $1, $length - 1);
531			} elsif (/^(\d+)-(\d*)$/) {
532			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
533			} else {
534			($l, $h) = (0, $length - 1);
535			goto ignore;
536			}
537	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
538	root	1.1	}
539			$hdr->{"Content-Range"} = "bytes */$length";
540	root	1.24	$hdr->{"Content-Length"} = $length;
541			$self->err(416, "not satisfiable", $hdr, "");
542	root	1.1
543			satisfiable:
544	root	1.4	# check for segmented downloads
545	root	1.10	if ($l && $::NO_SEGMENTED) {
546	root	1.56	my $timeout = $::NOW + 15;
547	root	1.58	while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
548	root	1.56	if ($timeout <= $::NOW) {
549			$self->block($::BLOCKTIME, "segmented downloads are forbidden");
550			#$self->err_segmented_download;
551	root	1.29	} else {
552	root	1.46	$httpevent->wait;
553	root	1.29	}
554	root	1.4	}
555			}
556
557	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
558			@code = (206, "partial content");
559			$length = $h - $l + 1;
560
561			ignore:
562			} else {
563			($l, $h) = (0, $length - 1);
564			}
565
566	root	1.9	$self->{path} =~ /\.([^.]+)$/;
567			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
568	root	1.1	$hdr->{"Content-Length"} = $length;
569
570	root	1.4	$self->response(@code, $hdr, "");
571	root	1.1
572			if ($self->{method} eq "GET") {
573	root	1.32	$self->{time} = $::NOW;
574	root	1.71	$self->{written} = 0;
575	root	1.32
576	root	1.49	my $current = $Coro::current;
577	root	1.35
578	root	1.49	my ($fh, $buf, $r);
579	root	1.32
580	root	1.1	open $fh, "<", $self->{path}
581			or die "$self->{path}: late open failure ($!)";
582
583			$h -= $l - 1;
584
585	root	1.49	if (0) { # !AIO
586	root	1.19	if ($l) {
587			sysseek $fh, $l, 0;
588			}
589			}
590	root	1.48
591	root	1.56	my $transfer = $queue->start_transfer($h);
592	root	1.51	my $locked;
593	root	1.48	my $bufsize = $::WAIT_BUFSIZE; # initial buffer size
594	root	1.19
595	root	1.1	while ($h > 0) {
596	root	1.51	unless ($locked) {
597			if ($locked \|\|= $transfer->try($::WAIT_INTERVAL)) {
598	root	1.48	$bufsize = $::BUFSIZE;
599			$self->{time} = $::NOW;
600	root	1.71	$self->{written} = 0;
601	root	1.48	}
602	root	1.56	}
603
604			if ($blocked{$self->{remote_id}}) {
605			$self->{h}{connection} = "close";
606	root	1.59	die bless {}, err::;
607	root	1.48	}
608
609	root	1.49	if (0) { # !AIO
610	root	1.48	sysread $fh, $buf, $h > $bufsize ? $bufsize : $h
611	root	1.19	or last;
612			} else {
613	root	1.48	aio_read($fh, $l, ($h > $bufsize ? $bufsize : $h),
614	root	1.19	$buf, 0, sub {
615			$r = $_[0];
616	root	1.37	Coro::ready($current);
617	root	1.19	});
618			&Coro::schedule;
619			last unless $r;
620			}
621	root	1.67
622			$tbf->request(length $buf);
623	root	1.37	my $w = syswrite $self->{fh}, $buf
624	root	1.1	or last;
625	root	1.11	$::written += $w;
626			$self->{written} += $w;
627	root	1.16	$l += $r;
628	root	1.1	}
629	root	1.32
630			close $fh;
631	root	1.1	}
632	root	1.7	}
633
634	root	1.2	1;