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;

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;

   $self->{written} +=
      print {$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);
            } 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:	1.66
Committed:	Mon Feb 25 03:21:09 2002 UTC (22 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.65:	+2 -2 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 $queue_index = new transferqueue 10;
59	root	1.62
60	root	1.6	my @newcons;
61	root	1.1	my @pool;
62
63	root	1.2	# one "execution thread"
64	root	1.1	sub handler {
65			while () {
66	root	1.38	if (@newcons) {
67	root	1.1	eval {
68	root	1.38	conn->new(@{pop @newcons})->handle;
69	root	1.1	};
70			slog 1, "$@" if $@ && !ref $@;
71	root	1.56
72			$httpevent->broadcast; # only for testing, but doesn't matter much
73
74	root	1.1	$connections->up;
75			} else {
76			last if @pool >= $MAX_POOL;
77			push @pool, $Coro::current;
78			schedule;
79			}
80			}
81			}
82
83	root	1.40	sub listen_on {
84			my $listen = $_[0];
85
86			push @listen_sockets, $listen;
87
88			# the "main thread"
89			async {
90			slog 1, "accepting connections";
91			while () {
92			$connections->down;
93			push @newcons, [$listen->accept];
94			#slog 3, "accepted @$connections ".scalar(@pool);
95			if (@pool) {
96			(pop @pool)->ready;
97			} else {
98			async \&handler;
99			}
100
101			}
102			};
103			}
104
105	root	1.4	my $http_port = new Coro::Socket
106			LocalAddr => $SERVER_HOST,
107			LocalPort => $SERVER_PORT,
108			ReuseAddr => 1,
109	root	1.13	Listen => 50,
110	root	1.4	or die "unable to start server";
111
112	root	1.40	listen_on $http_port;
113
114	root	1.41	if ($SERVER_PORT2) {
115			my $http_port = new Coro::Socket
116			LocalAddr => $SERVER_HOST,
117			LocalPort => $SERVER_PORT2,
118			ReuseAddr => 1,
119			Listen => 50,
120			or die "unable to start server";
121	root	1.40
122	root	1.41	listen_on $http_port;
123			}
124	root	1.4
125	root	1.1	package conn;
126
127			use Socket;
128			use HTTP::Date;
129	root	1.2	use Convert::Scalar 'weaken';
130	root	1.16	use Linux::AIO;
131
132			Linux::AIO::min_parallel $::AIO_PARALLEL;
133
134			Event->io(fd => Linux::AIO::poll_fileno,
135	root	1.17	poll => 'r', async => 1,
136	root	1.21	cb => \&Linux::AIO::poll_cb);
137	root	1.16
138	root	1.26	our %conn; # $conn{ip}{self} => connobj
139			our %uri; # $uri{ip}{uri}{self}
140	root	1.3	our %blocked;
141	root	1.9	our %mimetype;
142
143			sub read_mimetypes {
144			local *M;
145	root	1.10	if (open M, "<mime_types") {
146	root	1.9	while (<M>) {
147			if (/^([^#]\S+)\t+(\S+)$/) {
148			$mimetype{lc $1} = $2;
149			}
150			}
151			} else {
152	root	1.10	print "cannot open mime_types\n";
153	root	1.9	}
154			}
155	root	1.1
156	root	1.10	read_mimetypes;
157
158	root	1.1	sub new {
159			my $class = shift;
160	root	1.42	my $fh = shift;
161	root	1.6	my $peername = shift;
162	root	1.2	my $self = bless { fh => $fh }, $class;
163	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
164			or $self->err(500, "unable to decode peername");
165	root	1.7
166	root	1.50	$self->{remote_addr} =
167			$self->{remote_id} = inet_ntoa $iaddr;
168	root	1.60
169	root	1.11	$self->{time} = $::NOW;
170	root	1.2
171	root	1.49	weaken ($Coro::current->{conn} = $self);
172
173	root	1.13	$::conns++;
174	root	1.53	$::maxconns = $::conns if $::conns > $::maxconns;
175	root	1.13
176	root	1.2	$self;
177			}
178
179			sub DESTROY {
180	root	1.56	#my $self = shift;
181	root	1.13	$::conns--;
182	root	1.1	}
183
184			sub slog {
185	root	1.4	my $self = shift;
186	root	1.50	main::slog($_[0], "$self->{remote_id}> $_[1]");
187	root	1.1	}
188
189	root	1.4	sub response {
190	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
191	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
192	root	1.63	my $GZ = "";
193	root	1.1
194	root	1.46	if (exists $hdr->{Connection}) {
195			if ($hdr->{Connection} =~ /close/) {
196			$self->{h}{connection} = "close"
197			}
198			} else {
199			if ($self->{version} < 1.1) {
200			if ($self->{h}{connection} =~ /keep-alive/i) {
201			$hdr->{Connection} = "Keep-Alive";
202			} else {
203			$self->{h}{connection} = "close"
204			}
205			}
206			}
207	root	1.28
208	root	1.63	if ($self->{method} ne "HEAD"
209			&& $self->{h}{"accept-encoding"} =~ /\bgzip\b/
210	root	1.64	&& 400 < length $content
211	root	1.63	&& $hdr->{"Content-Length"} == length $content
212			&& !exists $hdr->{"Content-Encoding"}
213			) {
214			my $orig = length $content;
215			$hdr->{"Content-Encoding"} = "gzip";
216			$content = Compress::Zlib::memGzip(\$content);
217			$hdr->{"Content-Length"} = length $content;
218			$GZ = sprintf "GZ%02d", 100 - 100*((length $content) / $orig);
219			}
220
221	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
222	root	1.1
223			while (my ($h, $v) = each %$hdr) {
224			$res .= "$h: $v\015\012"
225			}
226	root	1.10	$res .= "\015\012";
227	root	1.4
228	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
229	root	1.1
230	root	1.65	my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW).
231	root	1.63	" $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.$GZ.
232	root	1.50	" \"$self->{h}{referer}\"\n";
233	root	1.27
234	root	1.65	print $::accesslog $log if $::accesslog;
235	root	1.27	print STDERR $log;
236	root	1.2
237	root	1.11	$self->{written} +=
238			print {$self->{fh}} $res;
239	root	1.1	}
240
241			sub err {
242			my $self = shift;
243			my ($code, $msg, $hdr, $content) = @_;
244
245			unless (defined $content) {
246	root	1.35	$content = "$code $msg\n";
247	root	1.1	$hdr->{"Content-Type"} = "text/plain";
248			$hdr->{"Content-Length"} = length $content;
249			}
250	root	1.17	$hdr->{"Connection"} = "close";
251	root	1.1
252	root	1.4	$self->response($code, $msg, $hdr, $content);
253	root	1.1
254			die bless {}, err::;
255			}
256
257			sub handle {
258			my $self = shift;
259			my $fh = $self->{fh};
260
261	root	1.29	my $host;
262
263	root	1.17	$fh->timeout($::REQ_TIMEOUT);
264			while() {
265			$self->{reqs}++;
266	root	1.1
267			# read request and parse first line
268			my $req = $fh->readline("\015\012\015\012");
269
270	root	1.17	unless (defined $req) {
271			if (exists $self->{version}) {
272			last;
273			} else {
274			$self->err(408, "request timeout");
275			}
276			}
277
278			$self->{h} = {};
279	root	1.1
280	root	1.17	$fh->timeout($::RES_TIMEOUT);
281	root	1.3
282	root	1.1	$req =~ /^(?:\015\012)?
283			(GET\|HEAD) \040+
284			([^\040]+) \040+
285			HTTP\/([0-9]+\.[0-9]+)
286			\015\012/gx
287	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
288	root	1.1
289			$self->{method} = $1;
290			$self->{uri} = $2;
291	root	1.17	$self->{version} = $3;
292
293	root	1.20	$3 =~ /^1\./
294	root	1.17	or $self->err(506, "http protocol version $3 not supported");
295	root	1.1
296			# parse headers
297			{
298			my (%hdr, $h, $v);
299
300			$hdr{lc $1} .= ",$2"
301			while $req =~ /\G
302			([^:\000-\040]+):
303	root	1.66	[\011\040]*
304			((?: [^\015\012]+ \| \015\012[\011\040] )*)
305	root	1.1	\015\012
306			/gxc;
307
308			$req =~ /\G\015\012$/
309			or $self->err(400, "bad request");
310
311			$self->{h}{$h} = substr $v, 1
312			while ($h, $v) = each %hdr;
313			}
314
315	root	1.36	# remote id should be unique per user
316			my $id = $self->{remote_addr};
317
318			if (exists $self->{h}{"client-ip"}) {
319			$id .= "[".$self->{h}{"client-ip"}."]";
320			} elsif (exists $self->{h}{"x-forwarded-for"}) {
321			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
322			}
323
324			$self->{remote_id} = $id;
325
326	root	1.56	weaken (local $conn{$id}{$self*1} = $self);
327
328	root	1.36	if ($blocked{$id}) {
329	root	1.56	$self->err_blocked
330			if $blocked{$id}[0] > $::NOW;
331	root	1.36
332			delete $blocked{$id};
333			}
334
335	root	1.29	# find out server name and port
336			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
337			$host = $1;
338			} else {
339			$host = $self->{h}{host};
340			}
341
342			if (defined $host) {
343			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
344			} else {
345			($self->{server_port}, $host)
346	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
347	root	1.29	or $self->err(500, "unable to get socket name");
348			$host = inet_ntoa $host;
349			}
350
351			$self->{server_name} = $host;
352
353	root	1.56	weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);
354	root	1.1
355	root	1.24	eval {
356			$self->map_uri;
357			$self->respond;
358			};
359
360			die if $@ && !ref $@;
361	root	1.17
362	root	1.56	last if $self->{h}{connection} =~ /close/i;
363	root	1.17
364	root	1.44	$httpevent->broadcast;
365
366	root	1.17	$fh->timeout($::PER_TIMEOUT);
367			}
368	root	1.1	}
369
370	root	1.56	sub block {
371			my $self = shift;
372
373			$blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
374			$self->slog(2, "blocked ip $self->{remote_id}");
375			$self->err_blocked;
376			}
377
378	root	1.1	# uri => path mapping
379			sub map_uri {
380			my $self = shift;
381	root	1.29	my $host = $self->{server_name};
382	root	1.1	my $uri = $self->{uri};
383
384			# some massaging, also makes it more secure
385			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
386			$uri =~ s%//+%/%g;
387			$uri =~ s%/\.(?=/\|$)%%g;
388			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
389
390			$uri =~ m%^/?\.\.(?=/\|$)%
391			and $self->err(400, "bad request");
392
393			$self->{name} = $uri;
394
395			# now do the path mapping
396			$self->{path} = "$::DOCROOT/$host$uri";
397	root	1.7
398			$self->access_check;
399	root	1.1	}
400
401			sub _cgi {
402			my $self = shift;
403			my $path = shift;
404			my $fh;
405
406			# no two-way xxx supported
407			if (0 == fork) {
408			open STDOUT, ">&".fileno($self->{fh});
409			if (chdir $::DOCROOT) {
410			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
411	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
412			$ENV{HTTP_PORT} = $self->{server_port};
413	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
414	root	1.10	exec $path;
415	root	1.1	}
416			Coro::State::_exit(0);
417			} else {
418	root	1.29	die;
419	root	1.1	}
420			}
421
422	root	1.29	sub server_hostport {
423			$_[0]{server_port} == 80
424			? $_[0]{server_name}
425			: "$_[0]{server_name}:$_[0]{server_port}";
426			}
427
428	root	1.1	sub respond {
429			my $self = shift;
430			my $path = $self->{path};
431
432	root	1.49	if ($self->{name} =~ s%^/internal/([^/]+)%%) {
433			if ($::internal{$1}) {
434			$::internal{$1}->($self);
435			} else {
436			$self->err(404, "not found");
437			}
438			} else {
439	root	1.1
440	root	1.49	stat $path
441			or $self->err(404, "not found");
442	root	1.10
443	root	1.49	$self->{stat} = [stat _];
444	root	1.1
445	root	1.49	# idiotic netscape sends idiotic headers AGAIN
446			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
447			? str2time $1 : 0;
448
449			if (-d _ && -r _) {
450			# directory
451			if ($path !~ /\/$/) {
452			# create a redirect to get the trailing "/"
453			# we don't try to avoid the :80
454			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
455	root	1.25	} else {
456	root	1.49	$ims < $self->{stat}[9]
457			or $self->err(304, "not modified");
458
459			if (-r "$path/index.html") {
460			# replace directory "size" by index.html filesize
461	root	1.55	$self->{stat} = [stat ($self->{path} .= "/index.html")];
462	root	1.52	$self->handle_file($queue_index);
463	root	1.49	} else {
464			$self->handle_dir;
465			}
466	root	1.1	}
467	root	1.49	} elsif (-f _ && -r _) {
468			-x _ and $self->err(403, "forbidden");
469	root	1.56
470	root	1.58	if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
471	root	1.56	my $timeout = $::NOW + 10;
472	root	1.58	while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
473	root	1.56	if ($timeout < $::NOW) {
474			$self->block($::BLOCKTIME, "too many connections");
475			} else {
476			$httpevent->wait;
477			}
478			}
479			}
480
481			$self->handle_file($queue_file);
482	root	1.49	} else {
483			$self->err(404, "not found");
484	root	1.1	}
485			}
486			}
487
488			sub handle_dir {
489			my $self = shift;
490	root	1.10	my $idx = $self->diridx;
491
492			$self->response(200, "ok",
493			{
494			"Content-Type" => "text/html",
495			"Content-Length" => length $idx,
496	root	1.55	"Last-Modified" => time2str ($self->{stat}[9]),
497	root	1.10	},
498			$idx);
499	root	1.1	}
500
501			sub handle_file {
502	root	1.52	my ($self, $queue) = @_;
503	root	1.34	my $length = $self->{stat}[7];
504	root	1.1	my $hdr = {
505			"Last-Modified" => time2str ((stat _)[9]),
506			};
507
508			my @code = (200, "ok");
509			my ($l, $h);
510
511			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
512			for (split /,/, $1) {
513			if (/^-(\d+)$/) {
514			($l, $h) = ($length - $1, $length - 1);
515			} elsif (/^(\d+)-(\d*)$/) {
516			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
517			} else {
518			($l, $h) = (0, $length - 1);
519			goto ignore;
520			}
521	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
522	root	1.1	}
523			$hdr->{"Content-Range"} = "bytes */$length";
524	root	1.24	$hdr->{"Content-Length"} = $length;
525			$self->err(416, "not satisfiable", $hdr, "");
526	root	1.1
527			satisfiable:
528	root	1.4	# check for segmented downloads
529	root	1.10	if ($l && $::NO_SEGMENTED) {
530	root	1.56	my $timeout = $::NOW + 15;
531	root	1.58	while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
532	root	1.56	if ($timeout <= $::NOW) {
533			$self->block($::BLOCKTIME, "segmented downloads are forbidden");
534			#$self->err_segmented_download;
535	root	1.29	} else {
536	root	1.46	$httpevent->wait;
537	root	1.29	}
538	root	1.4	}
539			}
540
541	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
542			@code = (206, "partial content");
543			$length = $h - $l + 1;
544
545			ignore:
546			} else {
547			($l, $h) = (0, $length - 1);
548			}
549
550	root	1.9	$self->{path} =~ /\.([^.]+)$/;
551			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
552	root	1.1	$hdr->{"Content-Length"} = $length;
553
554	root	1.4	$self->response(@code, $hdr, "");
555	root	1.1
556			if ($self->{method} eq "GET") {
557	root	1.32	$self->{time} = $::NOW;
558
559	root	1.49	my $current = $Coro::current;
560	root	1.35
561	root	1.49	my ($fh, $buf, $r);
562	root	1.32
563	root	1.1	open $fh, "<", $self->{path}
564			or die "$self->{path}: late open failure ($!)";
565
566			$h -= $l - 1;
567
568	root	1.49	if (0) { # !AIO
569	root	1.19	if ($l) {
570			sysseek $fh, $l, 0;
571			}
572			}
573	root	1.48
574	root	1.56	my $transfer = $queue->start_transfer($h);
575	root	1.51	my $locked;
576	root	1.48	my $bufsize = $::WAIT_BUFSIZE; # initial buffer size
577	root	1.19
578	root	1.1	while ($h > 0) {
579	root	1.51	unless ($locked) {
580			if ($locked \|\|= $transfer->try($::WAIT_INTERVAL)) {
581	root	1.48	$bufsize = $::BUFSIZE;
582			$self->{time} = $::NOW;
583			}
584	root	1.56	}
585
586			if ($blocked{$self->{remote_id}}) {
587			$self->{h}{connection} = "close";
588	root	1.59	die bless {}, err::;
589	root	1.48	}
590
591	root	1.49	if (0) { # !AIO
592	root	1.48	sysread $fh, $buf, $h > $bufsize ? $bufsize : $h
593	root	1.19	or last;
594			} else {
595	root	1.48	aio_read($fh, $l, ($h > $bufsize ? $bufsize : $h),
596	root	1.19	$buf, 0, sub {
597			$r = $_[0];
598	root	1.37	Coro::ready($current);
599	root	1.19	});
600			&Coro::schedule;
601			last unless $r;
602			}
603	root	1.37	my $w = syswrite $self->{fh}, $buf
604	root	1.1	or last;
605	root	1.11	$::written += $w;
606			$self->{written} += $w;
607	root	1.16	$l += $r;
608	root	1.1	}
609	root	1.32
610			close $fh;
611	root	1.1	}
612	root	1.7	}
613
614	root	1.2	1;