Coro/myhttpd/httpd.pl

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

use HTTP::Date;
use POSIX ();

no utf8;
use bytes;

# at least on my machine, this thingy serves files
# quite a bit faster than apache, ;)
# and quite a bit slower than thttpd :(

$SIG{PIPE} = 'IGNORE';

our $accesslog;
our $errorlog;

our $NOW;
our $HTTP_NOW;

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

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

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

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

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

our $queue_file  = new transferqueue slots => $MAX_TRANSFERS, maxsize => 250_000_000;
our $queue_index = new transferqueue slots => 10;

our $requests;

my @newcons;
my @pool;

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

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

         $connections->up;
      } else {
         last if @pool >= $MAX_POOL;
         push @pool, $Coro::current;
         schedule;
      }
   }
}

sub listen_on {
   my $listen = $_[0];

   push @listen_sockets, $listen;

   # the "main thread"
   async {
      slog 1, "accepting connections";
      while () {
         $connections->down;
         push @newcons, [$listen->accept];
         #slog 3, "accepted @$connections ".scalar(@pool);
         if (@pool) {
            (pop @pool)->ready;
         } else {
            async \&handler;
         }

      }
   };
}

my $http_port = new Coro::Socket
        LocalAddr => $SERVER_HOST,
        LocalPort => $SERVER_PORT,
        ReuseAddr => 1,
        Listen => 50,
   or die "unable to start server";

listen_on $http_port;

if ($SERVER_PORT2) {
   my $http_port = new Coro::Socket
           LocalAddr => $SERVER_HOST,
           LocalPort => $SERVER_PORT2,
           ReuseAddr => 1,
           Listen => 50,
      or die "unable to start server";

   listen_on $http_port;
}

package conn;

use Socket;
use HTTP::Date;
use Convert::Scalar 'weaken';
use Linux::AIO;

Linux::AIO::min_parallel $::AIO_PARALLEL;

Event->io(fd => Linux::AIO::poll_fileno,
          poll => 'r', async => 1,
          cb => \&Linux::AIO::poll_cb);

our %conn; # $conn{ip}{self} => connobj
our %uri;  # $uri{ip}{uri}{self}
our %blocked;
our %mimetype;

sub read_mimetypes {
   local *M;
   if (open M, "<mime_types") {
      while (<M>) {
         if (/^([^#]\S+)\t+(\S+)$/) {
            $mimetype{lc $1} = $2;
         }
      }
   } else {
      print "cannot open mime_types\n";
   }
}

read_mimetypes;

sub new {
   my $class = shift;
   my $fh = shift;
   my $peername = shift;
   my $self = bless { fh => $fh }, $class;
   my (undef, $iaddr) = unpack_sockaddr_in $peername
      or $self->err(500, "unable to decode peername");

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

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

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

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

   $self;
}

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

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

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

   if (exists $hdr->{Connection}) {
      if ($hdr->{Connection} =~ /close/) {
         $self->{h}{connection} = "close"
      }
   } else {
      if ($self->{version} < 1.1) {
         if ($self->{h}{connection} =~ /keep-alive/i) {
            $hdr->{Connection} = "Keep-Alive";
         } else {
            $self->{h}{connection} = "close"
         }
      }
   }

   $res .= "Date: $HTTP_NOW\015\012";

   while (my ($h, $v) = each %$hdr) {
      $res .= "$h: $v\015\012"
   }
   $res .= "\015\012";

   $res .= $content if defined $content and $self->{method} ne "HEAD";

   my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $NOW).
             " $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.
             " \"$self->{h}{referer}\"\n";

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

   $self->{written} +=
      print {$self->{fh}} $res;
}

sub err {
   my $self = shift;
   my ($code, $msg, $hdr, $content) = @_;

   unless (defined $content) {
      $content = "$code $msg\n";
      $hdr->{"Content-Type"} = "text/plain";
      $hdr->{"Content-Length"} = length $content;
   }
   $hdr->{"Connection"} = "close";

   $self->response($code, $msg, $hdr, $content);

   die bless {}, err::;
}

sub handle {
   my $self = shift;
   my $fh = $self->{fh};

   my $host;

   $fh->timeout($::REQ_TIMEOUT);
   while() {
      $self->{reqs}++;

      # read request and parse first line
      my $req = $fh->readline("\015\012\015\012");

      unless (defined $req) {
         if (exists $self->{version}) {
            last;
         } else {
            $self->err(408, "request timeout");
         }
      }

      $self->{h} = {};

      $fh->timeout($::RES_TIMEOUT);

      $req =~ /^(?:\015\012)?
                (GET|HEAD) \040+
                ([^\040]+) \040+
                HTTP\/([0-9]+\.[0-9]+)
                \015\012/gx
         or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });

      $self->{method} = $1;
      $self->{uri} = $2;
      $self->{version} = $3;

      $3 =~ /^1\./
         or $self->err(506, "http protocol version $3 not supported");

      # parse headers
      {
         my (%hdr, $h, $v);

         $hdr{lc $1} .= ",$2"
            while $req =~ /\G
                  ([^:\000-\040]+):
                  [\008\040]*
                  ((?: [^\015\012]+ | \015\012[\008\040] )*)
                  \015\012
               /gxc;

         $req =~ /\G\015\012$/
            or $self->err(400, "bad request");

         $self->{h}{$h} = substr $v, 1
            while ($h, $v) = each %hdr;
      }

      $requests++;

      # 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:	1.62
Committed:	Sun Jan 6 05:29:39 2002 UTC (22 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.61:	+5 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	use Coro;
2			use Coro::Semaphore;
3			use Coro::Event;
4			use Coro::Socket;
5	root	1.44	use Coro::Signal;
6	root	1.1
7	root	1.32	use HTTP::Date;
8	root	1.47	use POSIX ();
9	root	1.32
10	root	1.1	no utf8;
11			use bytes;
12
13			# at least on my machine, this thingy serves files
14			# quite a bit faster than apache, ;)
15			# and quite a bit slower than thttpd :(
16
17			$SIG{PIPE} = 'IGNORE';
18	root	1.27
19			our $accesslog;
20	root	1.56	our $errorlog;
21
22			our $NOW;
23			our $HTTP_NOW;
24
25			Event->timer(interval => 1, hard => 1, cb => sub {
26			$NOW = time;
27			$HTTP_NOW = time2str $NOW;
28			})->now;
29
30			if ($ERROR_LOG) {
31			use IO::Handle;
32			open $errorlog, ">>$ERROR_LOG"
33			or die "$ERROR_LOG: $!";
34			$errorlog->autoflush(1);
35			}
36	root	1.27
37			if ($ACCESS_LOG) {
38			use IO::Handle;
39			open $accesslog, ">>$ACCESS_LOG"
40			or die "$ACCESS_LOG: $!";
41			$accesslog->autoflush(1);
42			}
43
44	root	1.1	sub slog {
45			my $level = shift;
46			my $format = shift;
47	root	1.56	my $NOW = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW);
48			printf "$NOW: $format\n", @_;
49			printf $errorlog "$NOW: $format\n", @_ if $errorlog;
50	root	1.1	}
51
52	root	1.32	our $connections = new Coro::Semaphore $MAX_CONNECTS \|\| 250;
53	root	1.44	our $httpevent = new Coro::Signal;
54	root	1.34
55	root	1.62	our $queue_file = new transferqueue slots => $MAX_TRANSFERS, maxsize => 250_000_000;
56	root	1.61	our $queue_index = new transferqueue slots => 10;
57	root	1.1
58	root	1.62	our $requests;
59
60	root	1.6	my @newcons;
61	root	1.1	my @pool;
62
63	root	1.2	# one "execution thread"
64	root	1.1	sub handler {
65			while () {
66	root	1.38	if (@newcons) {
67	root	1.1	eval {
68	root	1.38	conn->new(@{pop @newcons})->handle;
69	root	1.1	};
70			slog 1, "$@" 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	1.1
193	root	1.46	if (exists $hdr->{Connection}) {
194			if ($hdr->{Connection} =~ /close/) {
195			$self->{h}{connection} = "close"
196			}
197			} else {
198			if ($self->{version} < 1.1) {
199			if ($self->{h}{connection} =~ /keep-alive/i) {
200			$hdr->{Connection} = "Keep-Alive";
201			} else {
202			$self->{h}{connection} = "close"
203			}
204			}
205			}
206	root	1.28
207	root	1.32	$res .= "Date: $HTTP_NOW\015\012";
208	root	1.1
209			while (my ($h, $v) = each %$hdr) {
210			$res .= "$h: $v\015\012"
211			}
212	root	1.10	$res .= "\015\012";
213	root	1.4
214	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
215	root	1.1
216	root	1.47	my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $NOW).
217	root	1.50	" $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.
218			" \"$self->{h}{referer}\"\n";
219	root	1.27
220			print $accesslog $log if $accesslog;
221			print STDERR $log;
222	root	1.2
223	root	1.11	$self->{written} +=
224			print {$self->{fh}} $res;
225	root	1.1	}
226
227			sub err {
228			my $self = shift;
229			my ($code, $msg, $hdr, $content) = @_;
230
231			unless (defined $content) {
232	root	1.35	$content = "$code $msg\n";
233	root	1.1	$hdr->{"Content-Type"} = "text/plain";
234			$hdr->{"Content-Length"} = length $content;
235			}
236	root	1.17	$hdr->{"Connection"} = "close";
237	root	1.1
238	root	1.4	$self->response($code, $msg, $hdr, $content);
239	root	1.1
240			die bless {}, err::;
241			}
242
243			sub handle {
244			my $self = shift;
245			my $fh = $self->{fh};
246
247	root	1.29	my $host;
248
249	root	1.17	$fh->timeout($::REQ_TIMEOUT);
250			while() {
251			$self->{reqs}++;
252	root	1.1
253			# read request and parse first line
254			my $req = $fh->readline("\015\012\015\012");
255
256	root	1.17	unless (defined $req) {
257			if (exists $self->{version}) {
258			last;
259			} else {
260			$self->err(408, "request timeout");
261			}
262			}
263
264			$self->{h} = {};
265	root	1.1
266	root	1.17	$fh->timeout($::RES_TIMEOUT);
267	root	1.3
268	root	1.1	$req =~ /^(?:\015\012)?
269			(GET\|HEAD) \040+
270			([^\040]+) \040+
271			HTTP\/([0-9]+\.[0-9]+)
272			\015\012/gx
273	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
274	root	1.1
275			$self->{method} = $1;
276			$self->{uri} = $2;
277	root	1.17	$self->{version} = $3;
278
279	root	1.20	$3 =~ /^1\./
280	root	1.17	or $self->err(506, "http protocol version $3 not supported");
281	root	1.1
282			# parse headers
283			{
284			my (%hdr, $h, $v);
285
286			$hdr{lc $1} .= ",$2"
287			while $req =~ /\G
288			([^:\000-\040]+):
289			[\008\040]*
290			((?: [^\015\012]+ \| \015\012[\008\040] )*)
291			\015\012
292			/gxc;
293
294			$req =~ /\G\015\012$/
295			or $self->err(400, "bad request");
296
297			$self->{h}{$h} = substr $v, 1
298			while ($h, $v) = each %hdr;
299			}
300	root	1.62
301			$requests++;
302	root	1.1
303	root	1.36	# remote id should be unique per user
304			my $id = $self->{remote_addr};
305
306			if (exists $self->{h}{"client-ip"}) {
307			$id .= "[".$self->{h}{"client-ip"}."]";
308			} elsif (exists $self->{h}{"x-forwarded-for"}) {
309			$id .= "[".$self->{h}{"x-forwarded-for"}."]";
310			}
311
312			$self->{remote_id} = $id;
313
314	root	1.56	weaken (local $conn{$id}{$self*1} = $self);
315
316	root	1.36	if ($blocked{$id}) {
317	root	1.56	$self->err_blocked
318			if $blocked{$id}[0] > $::NOW;
319	root	1.36
320			delete $blocked{$id};
321			}
322
323	root	1.29	# find out server name and port
324			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
325			$host = $1;
326			} else {
327			$host = $self->{h}{host};
328			}
329
330			if (defined $host) {
331			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
332			} else {
333			($self->{server_port}, $host)
334	root	1.43	= unpack_sockaddr_in $self->{fh}->sockname
335	root	1.29	or $self->err(500, "unable to get socket name");
336			$host = inet_ntoa $host;
337			}
338
339			$self->{server_name} = $host;
340
341	root	1.56	weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);
342	root	1.1
343	root	1.24	eval {
344			$self->map_uri;
345			$self->respond;
346			};
347
348			die if $@ && !ref $@;
349	root	1.17
350	root	1.56	last if $self->{h}{connection} =~ /close/i;
351	root	1.17
352	root	1.44	$httpevent->broadcast;
353
354	root	1.17	$fh->timeout($::PER_TIMEOUT);
355			}
356	root	1.1	}
357
358	root	1.56	sub block {
359			my $self = shift;
360
361			$blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
362			$self->slog(2, "blocked ip $self->{remote_id}");
363			$self->err_blocked;
364			}
365
366	root	1.1	# uri => path mapping
367			sub map_uri {
368			my $self = shift;
369	root	1.29	my $host = $self->{server_name};
370	root	1.1	my $uri = $self->{uri};
371
372			# some massaging, also makes it more secure
373			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
374			$uri =~ s%//+%/%g;
375			$uri =~ s%/\.(?=/\|$)%%g;
376			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
377
378			$uri =~ m%^/?\.\.(?=/\|$)%
379			and $self->err(400, "bad request");
380
381			$self->{name} = $uri;
382
383			# now do the path mapping
384			$self->{path} = "$::DOCROOT/$host$uri";
385	root	1.7
386			$self->access_check;
387	root	1.1	}
388
389			sub _cgi {
390			my $self = shift;
391			my $path = shift;
392			my $fh;
393
394			# no two-way xxx supported
395			if (0 == fork) {
396			open STDOUT, ">&".fileno($self->{fh});
397			if (chdir $::DOCROOT) {
398			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
399	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
400			$ENV{HTTP_PORT} = $self->{server_port};
401	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
402	root	1.10	exec $path;
403	root	1.1	}
404			Coro::State::_exit(0);
405			} else {
406	root	1.29	die;
407	root	1.1	}
408			}
409
410	root	1.29	sub server_hostport {
411			$_[0]{server_port} == 80
412			? $_[0]{server_name}
413			: "$_[0]{server_name}:$_[0]{server_port}";
414			}
415
416	root	1.1	sub respond {
417			my $self = shift;
418			my $path = $self->{path};
419
420	root	1.49	if ($self->{name} =~ s%^/internal/([^/]+)%%) {
421			if ($::internal{$1}) {
422			$::internal{$1}->($self);
423			} else {
424			$self->err(404, "not found");
425			}
426			} else {
427	root	1.1
428	root	1.49	stat $path
429			or $self->err(404, "not found");
430	root	1.10
431	root	1.49	$self->{stat} = [stat _];
432	root	1.1
433	root	1.49	# idiotic netscape sends idiotic headers AGAIN
434			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
435			? str2time $1 : 0;
436
437			if (-d _ && -r _) {
438			# directory
439			if ($path !~ /\/$/) {
440			# create a redirect to get the trailing "/"
441			# we don't try to avoid the :80
442			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
443	root	1.25	} else {
444	root	1.49	$ims < $self->{stat}[9]
445			or $self->err(304, "not modified");
446
447			if (-r "$path/index.html") {
448			# replace directory "size" by index.html filesize
449	root	1.55	$self->{stat} = [stat ($self->{path} .= "/index.html")];
450	root	1.52	$self->handle_file($queue_index);
451	root	1.49	} else {
452			$self->handle_dir;
453			}
454	root	1.1	}
455	root	1.49	} elsif (-f _ && -r _) {
456			-x _ and $self->err(403, "forbidden");
457	root	1.56
458	root	1.58	if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
459	root	1.56	my $timeout = $::NOW + 10;
460	root	1.58	while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
461	root	1.56	if ($timeout < $::NOW) {
462			$self->block($::BLOCKTIME, "too many connections");
463			} else {
464			$httpevent->wait;
465			}
466			}
467			}
468
469			$self->handle_file($queue_file);
470	root	1.49	} else {
471			$self->err(404, "not found");
472	root	1.1	}
473			}
474			}
475
476			sub handle_dir {
477			my $self = shift;
478	root	1.10	my $idx = $self->diridx;
479
480			$self->response(200, "ok",
481			{
482			"Content-Type" => "text/html",
483			"Content-Length" => length $idx,
484	root	1.55	"Last-Modified" => time2str ($self->{stat}[9]),
485	root	1.10	},
486			$idx);
487	root	1.1	}
488
489			sub handle_file {
490	root	1.52	my ($self, $queue) = @_;
491	root	1.34	my $length = $self->{stat}[7];
492	root	1.1	my $hdr = {
493			"Last-Modified" => time2str ((stat _)[9]),
494			};
495
496			my @code = (200, "ok");
497			my ($l, $h);
498
499			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
500			for (split /,/, $1) {
501			if (/^-(\d+)$/) {
502			($l, $h) = ($length - $1, $length - 1);
503			} elsif (/^(\d+)-(\d*)$/) {
504			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
505			} else {
506			($l, $h) = (0, $length - 1);
507			goto ignore;
508			}
509	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
510	root	1.1	}
511			$hdr->{"Content-Range"} = "bytes */$length";
512	root	1.24	$hdr->{"Content-Length"} = $length;
513			$self->err(416, "not satisfiable", $hdr, "");
514	root	1.1
515			satisfiable:
516	root	1.4	# check for segmented downloads
517	root	1.10	if ($l && $::NO_SEGMENTED) {
518	root	1.56	my $timeout = $::NOW + 15;
519	root	1.58	while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
520	root	1.56	if ($timeout <= $::NOW) {
521			$self->block($::BLOCKTIME, "segmented downloads are forbidden");
522			#$self->err_segmented_download;
523	root	1.29	} else {
524	root	1.46	$httpevent->wait;
525	root	1.29	}
526	root	1.4	}
527			}
528
529	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
530			@code = (206, "partial content");
531			$length = $h - $l + 1;
532
533			ignore:
534			} else {
535			($l, $h) = (0, $length - 1);
536			}
537
538	root	1.9	$self->{path} =~ /\.([^.]+)$/;
539			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
540	root	1.1	$hdr->{"Content-Length"} = $length;
541
542	root	1.4	$self->response(@code, $hdr, "");
543	root	1.1
544			if ($self->{method} eq "GET") {
545	root	1.32	$self->{time} = $::NOW;
546
547	root	1.49	my $current = $Coro::current;
548	root	1.35
549	root	1.49	my ($fh, $buf, $r);
550	root	1.32
551	root	1.1	open $fh, "<", $self->{path}
552			or die "$self->{path}: late open failure ($!)";
553
554			$h -= $l - 1;
555
556	root	1.49	if (0) { # !AIO
557	root	1.19	if ($l) {
558			sysseek $fh, $l, 0;
559			}
560			}
561	root	1.48
562	root	1.56	my $transfer = $queue->start_transfer($h);
563	root	1.51	my $locked;
564	root	1.48	my $bufsize = $::WAIT_BUFSIZE; # initial buffer size
565	root	1.19
566	root	1.1	while ($h > 0) {
567	root	1.51	unless ($locked) {
568			if ($locked \|\|= $transfer->try($::WAIT_INTERVAL)) {
569	root	1.48	$bufsize = $::BUFSIZE;
570			$self->{time} = $::NOW;
571			}
572	root	1.56	}
573
574			if ($blocked{$self->{remote_id}}) {
575			$self->{h}{connection} = "close";
576	root	1.59	die bless {}, err::;
577	root	1.48	}
578
579	root	1.49	if (0) { # !AIO
580	root	1.48	sysread $fh, $buf, $h > $bufsize ? $bufsize : $h
581	root	1.19	or last;
582			} else {
583	root	1.48	aio_read($fh, $l, ($h > $bufsize ? $bufsize : $h),
584	root	1.19	$buf, 0, sub {
585			$r = $_[0];
586	root	1.37	Coro::ready($current);
587	root	1.19	});
588			&Coro::schedule;
589			last unless $r;
590			}
591	root	1.37	my $w = syswrite $self->{fh}, $buf
592	root	1.1	or last;
593	root	1.11	$::written += $w;
594			$self->{written} += $w;
595	root	1.16	$l += $r;
596	root	1.1	}
597	root	1.32
598			close $fh;
599	root	1.1	}
600	root	1.7	}
601
602	root	1.2	1;