Coro/myhttpd/httpd.pl

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

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';
   
sub slog {
   my $level = shift;
   my $format = shift;
   printf "---: $format\n", @_;
}

my $connections = new Coro::Semaphore $MAX_CONNECTS;

my @newcons;
my @pool;

# one "execution thread"
sub handler {
   while () {
      my $new = pop @newcons;
      if ($new) {
         eval {
            conn->new(@$new)->handle;
         };
         slog 1, "$@" if $@ && !ref $@;
         $connections->up;
      } else {
         last if @pool >= $MAX_POOL;
         push @pool, $Coro::current;
         schedule;
      }
   }
}

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

push @listen_sockets, $http_port;

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

   }
};

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 );

Event->add_hooks(prepare => sub {
   &Coro::cede while &Coro::nready;
   1e6;
});

our %conn; # $conn{ip}{fh} => connobj
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 $peername = shift;
   my $fh = 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} = inet_ntoa $iaddr;
   $self->{time} = $::NOW;

   # enter ourselves into various lists
   weaken ($conn{$self->{remote_addr}}{$self*1} = $self);

   $::conns++;

   $self;
}

sub DESTROY {
   my $self = shift;

   $::conns--;

   delete $conn{$self->{remote_addr}}{$self*1};
   delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
}

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

sub response {
   my ($self, $code, $msg, $hdr, $content) = @_;
   my $res = "HTTP/1.0 $code $msg\015\012";

   $res .= "Connection: close\015\012";
   $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(

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

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

   print STDERR "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";#d#

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

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

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

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

   die bless {}, err::;
}

sub err_blocked {
   my $self = shift;
   my $ip = $self->{remote_addr};
   my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;

   Coro::Event::do_timer(after => 15);

   $self->err(401, "too many connections",
              {
                 "Content-Type" => "text/html",
                 "Retry-After" => $::BLOCKTIME
              },
              <<EOF);
<html><p>
You have been blocked because you opened too many connections. You
may retry at</p>

   <p><blockquote>$time.</blockquote></p>
   
<p>Until then, each new access will renew the block. You might want to have a
look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
</html>
EOF
}

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

   #while() {
      $self->{h} = {};

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

      defined $req or
         $self->err(408, "request timeout");

      my $ip = $self->{remote_addr};

      if ($blocked{$ip}) {
         $self->err_blocked($blocked{$ip})
            if $blocked{$ip} > $::NOW;

         delete $blocked{$ip};
      }

      if (%{$conn{$ip}} > $::MAX_CONN_IP) {
         $self->slog(2, "blocked ip $ip");
         $self->err_blocked;
      }

      $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" });

      $2 ne "1.0"
         or $self->err(506, "http protocol version not supported");

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

      # 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;
      }

      $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;

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

      $self->map_uri;
      $self->respond;
   #}
}

# uri => path mapping
sub map_uri {
   my $self = shift;
   my $host = $self->{h}{host} || "default";
   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 server_address {
   my $self = shift;
   my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
      or $self->err(500, "unable to get socket name");
   ((inet_ntoa $iaddr), $port);
}

sub server_host {
   my $self = shift;
   if (exists $self->{h}{host}) {
      return $self->{h}{host};
   } else {
      return (($self->server_address)[0]);
   }
}

sub server_hostport {
   my $self = shift;
   my ($host, $port);
   if (exists $self->{h}{host}) {
      ($host, $port) = ($self->{h}{host}, $self->{server_port});
   } else {
      ($host, $port) = $self->server_address;
   }
   $port = $port == 80 ? "" : ":$port";
   $host.$port;
}

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_host;
         $ENV{HTTP_PORT}       = $self->{server_host};
         $ENV{SCRIPT_NAME}     = $self->{name};
         exec $path;
      }
      Coro::State::_exit(0);
   } else {
   }
}

sub respond {
   my $self = shift;
   my $path = $self->{path};

   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 "/"
         my $host = $self->server_hostport;
         $self->err(301, "moved permanently", { Location =>  "http://$host$self->{uri}/" });
      } else {
         $ims < $self->{stat}[9]
            or $self->err(304, "not modified");

         if ($self->{method} eq "GET") {
            if (-r "$path/index.html") {
               $self->{path} .= "/index.html";
               $self->handle_file;
            } else {
               $self->handle_dir;
            }
         }
      }
   } elsif (-f _ && -r _) {
      -x _ and $self->err(403, "forbidden");
      $self->handle_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,
         },
         $idx);
}

sub handle_file {
   my $self = shift;
   my $length = -s _;
   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";
      $self->err(416, "not satisfiable", $hdr);

satisfiable:
      # check for segmented downloads
      if ($l && $::NO_SEGMENTED) {
         if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
            Coro::Event::do_timer(after => 15);

            $self->err(400, "segmented downloads are not allowed");
         }
      }

      $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 ($self->{method} eq "GET") {
      my ($fh, $buf, $r);
      my $current = $Coro::current;
      open $fh, "<", $self->{path}
         or die "$self->{path}: late open failure ($!)";

      $h -= $l - 1;

      while ($h > 0) {
         aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
                  $buf, 0, sub {
                     $r = $_[0];
                     $current->ready;
                  });
         &Coro::schedule;
         last unless $r;
         my $w = $self->{fh}->syswrite($buf)
            or last;
         $::written += $w;
         $self->{written} += $w;
         $l += $r;
      }
   }

   close $fh;
}

1;
Revision:	1.16
Committed:	Tue Aug 14 19:38:25 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+23 -7 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
6			no utf8;
7			use bytes;
8
9			# at least on my machine, this thingy serves files
10			# quite a bit faster than apache, ;)
11			# and quite a bit slower than thttpd :(
12
13			$SIG{PIPE} = 'IGNORE';
14
15			sub slog {
16			my $level = shift;
17			my $format = shift;
18			printf "---: $format\n", @_;
19			}
20
21			my $connections = new Coro::Semaphore $MAX_CONNECTS;
22
23	root	1.6	my @newcons;
24	root	1.1	my @pool;
25
26	root	1.2	# one "execution thread"
27	root	1.1	sub handler {
28			while () {
29	root	1.6	my $new = pop @newcons;
30			if ($new) {
31	root	1.1	eval {
32	root	1.6	conn->new(@$new)->handle;
33	root	1.1	};
34			slog 1, "$@" if $@ && !ref $@;
35			$connections->up;
36			} else {
37			last if @pool >= $MAX_POOL;
38			push @pool, $Coro::current;
39			schedule;
40			}
41			}
42			}
43
44	root	1.4	my $http_port = new Coro::Socket
45			LocalAddr => $SERVER_HOST,
46			LocalPort => $SERVER_PORT,
47			ReuseAddr => 1,
48	root	1.13	Listen => 50,
49	root	1.4	or die "unable to start server";
50
51			push @listen_sockets, $http_port;
52
53	root	1.2	# the "main thread"
54	root	1.1	async {
55			slog 1, "accepting connections";
56			while () {
57			$connections->down;
58	root	1.6	push @newcons, [$http_port->accept];
59	root	1.1	#slog 3, "accepted @$connections ".scalar(@pool);
60	root	1.3	$::NOW = time;
61	root	1.1	if (@pool) {
62			(pop @pool)->ready;
63			} else {
64			async \&handler;
65			}
66
67			}
68			};
69
70			package conn;
71
72			use Socket;
73			use HTTP::Date;
74	root	1.2	use Convert::Scalar 'weaken';
75	root	1.16	use Linux::AIO;
76
77			Linux::AIO::min_parallel $::AIO_PARALLEL;
78
79			Event->io(fd => Linux::AIO::poll_fileno,
80			poll => 'r',
81			async => 1,
82			cb => \&Linux::AIO::poll_cb );
83
84			Event->add_hooks(prepare => sub {
85			&Coro::cede while &Coro::nready;
86			1e6;
87			});
88	root	1.2
89	root	1.3	our %conn; # $conn{ip}{fh} => connobj
90			our %blocked;
91	root	1.9	our %mimetype;
92
93			sub read_mimetypes {
94			local *M;
95	root	1.10	if (open M, "<mime_types") {
96	root	1.9	while (<M>) {
97			if (/^([^#]\S+)\t+(\S+)$/) {
98			$mimetype{lc $1} = $2;
99			}
100			}
101			} else {
102	root	1.10	print "cannot open mime_types\n";
103	root	1.9	}
104			}
105	root	1.1
106	root	1.10	read_mimetypes;
107
108	root	1.1	sub new {
109			my $class = shift;
110	root	1.6	my $peername = shift;
111	root	1.1	my $fh = shift;
112	root	1.2	my $self = bless { fh => $fh }, $class;
113	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
114			or $self->err(500, "unable to decode peername");
115	root	1.7
116	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
117	root	1.11	$self->{time} = $::NOW;
118	root	1.2
119			# enter ourselves into various lists
120	root	1.3	weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
121
122	root	1.13	$::conns++;
123
124	root	1.2	$self;
125			}
126
127			sub DESTROY {
128			my $self = shift;
129	root	1.13
130			$::conns--;
131
132	root	1.3	delete $conn{$self->{remote_addr}}{$self*1};
133	root	1.13	delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
134	root	1.1	}
135
136			sub slog {
137	root	1.4	my $self = shift;
138			main::slog($_[0], "$self->{remote_addr}> $_[1]");
139	root	1.1	}
140
141	root	1.4	sub response {
142	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
143			my $res = "HTTP/1.0 $code $msg\015\012";
144
145	root	1.4	$res .= "Connection: close\015\012";
146			$res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(
147	root	1.1
148			while (my ($h, $v) = each %$hdr) {
149			$res .= "$h: $v\015\012"
150			}
151	root	1.10	$res .= "\015\012";
152	root	1.4
153	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
154	root	1.1
155	root	1.3	print STDERR "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";#d#
156	root	1.2
157	root	1.11	$self->{written} +=
158			print {$self->{fh}} $res;
159	root	1.1	}
160
161			sub err {
162			my $self = shift;
163			my ($code, $msg, $hdr, $content) = @_;
164
165			unless (defined $content) {
166			$content = "$code $msg";
167			$hdr->{"Content-Type"} = "text/plain";
168			$hdr->{"Content-Length"} = length $content;
169			}
170
171	root	1.4	$self->response($code, $msg, $hdr, $content);
172	root	1.1
173			die bless {}, err::;
174			}
175
176	root	1.3	sub err_blocked {
177			my $self = shift;
178			my $ip = $self->{remote_addr};
179			my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
180	root	1.10
181	root	1.14	Coro::Event::do_timer(after => 15);
182
183			$self->err(401, "too many connections",
184	root	1.4	{
185			"Content-Type" => "text/html",
186			"Retry-After" => $::BLOCKTIME
187			},
188	root	1.3	<<EOF);
189	root	1.4	<html><p>
190	root	1.3	You have been blocked because you opened too many connections. You
191	root	1.4	may retry at</p>
192
193			<p><blockquote>$time.</blockquote></p>
194
195			<p>Until then, each new access will renew the block. You might want to have a
196			look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
197			</html>
198	root	1.3	EOF
199			}
200
201	root	1.1	sub handle {
202			my $self = shift;
203			my $fh = $self->{fh};
204
205			#while() {
206			$self->{h} = {};
207
208			# read request and parse first line
209			$fh->timeout($::REQ_TIMEOUT);
210			my $req = $fh->readline("\015\012\015\012");
211			$fh->timeout($::RES_TIMEOUT);
212
213			defined $req or
214			$self->err(408, "request timeout");
215
216	root	1.3	my $ip = $self->{remote_addr};
217
218			if ($blocked{$ip}) {
219			$self->err_blocked($blocked{$ip})
220			if $blocked{$ip} > $::NOW;
221
222			delete $blocked{$ip};
223			}
224
225			if (%{$conn{$ip}} > $::MAX_CONN_IP) {
226	root	1.12	$self->slog(2, "blocked ip $ip");
227	root	1.3	$self->err_blocked;
228			}
229
230	root	1.1	$req =~ /^(?:\015\012)?
231			(GET\|HEAD) \040+
232			([^\040]+) \040+
233			HTTP\/([0-9]+\.[0-9]+)
234			\015\012/gx
235	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
236	root	1.1
237			$2 ne "1.0"
238			or $self->err(506, "http protocol version not supported");
239
240			$self->{method} = $1;
241			$self->{uri} = $2;
242
243			# parse headers
244			{
245			my (%hdr, $h, $v);
246
247			$hdr{lc $1} .= ",$2"
248			while $req =~ /\G
249			([^:\000-\040]+):
250			[\008\040]*
251			((?: [^\015\012]+ \| \015\012[\008\040] )*)
252			\015\012
253			/gxc;
254
255			$req =~ /\G\015\012$/
256			or $self->err(400, "bad request");
257
258			$self->{h}{$h} = substr $v, 1
259			while ($h, $v) = each %hdr;
260			}
261
262			$self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;
263	root	1.3
264	root	1.13	weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self);
265	root	1.1
266			$self->map_uri;
267			$self->respond;
268			#}
269			}
270
271			# uri => path mapping
272			sub map_uri {
273			my $self = shift;
274			my $host = $self->{h}{host} \|\| "default";
275			my $uri = $self->{uri};
276
277			# some massaging, also makes it more secure
278			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
279			$uri =~ s%//+%/%g;
280			$uri =~ s%/\.(?=/\|$)%%g;
281			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
282
283			$uri =~ m%^/?\.\.(?=/\|$)%
284			and $self->err(400, "bad request");
285
286			$self->{name} = $uri;
287
288			# now do the path mapping
289			$self->{path} = "$::DOCROOT/$host$uri";
290	root	1.7
291			$self->access_check;
292	root	1.1	}
293
294			sub server_address {
295			my $self = shift;
296			my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
297			or $self->err(500, "unable to get socket name");
298			((inet_ntoa $iaddr), $port);
299			}
300
301			sub server_host {
302			my $self = shift;
303			if (exists $self->{h}{host}) {
304			return $self->{h}{host};
305			} else {
306			return (($self->server_address)[0]);
307			}
308			}
309
310			sub server_hostport {
311			my $self = shift;
312			my ($host, $port);
313			if (exists $self->{h}{host}) {
314			($host, $port) = ($self->{h}{host}, $self->{server_port});
315			} else {
316			($host, $port) = $self->server_address;
317			}
318			$port = $port == 80 ? "" : ":$port";
319			$host.$port;
320			}
321
322			sub _cgi {
323			my $self = shift;
324			my $path = shift;
325			my $fh;
326
327			# no two-way xxx supported
328			if (0 == fork) {
329			open STDOUT, ">&".fileno($self->{fh});
330			if (chdir $::DOCROOT) {
331			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
332			$ENV{HTTP_HOST} = $self->server_host;
333			$ENV{HTTP_PORT} = $self->{server_host};
334			$ENV{SCRIPT_NAME} = $self->{name};
335	root	1.10	exec $path;
336	root	1.1	}
337			Coro::State::_exit(0);
338			} else {
339			}
340			}
341
342			sub respond {
343			my $self = shift;
344			my $path = $self->{path};
345
346			stat $path
347			or $self->err(404, "not found");
348
349	root	1.10	$self->{stat} = [stat _];
350
351	root	1.1	# idiotic netscape sends idiotic headers AGAIN
352			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
353			? str2time $1 : 0;
354
355			if (-d _ && -r _) {
356			# directory
357			if ($path !~ /\/$/) {
358			# create a redirect to get the trailing "/"
359			my $host = $self->server_hostport;
360			$self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" });
361			} else {
362	root	1.10	$ims < $self->{stat}[9]
363	root	1.1	or $self->err(304, "not modified");
364
365			if ($self->{method} eq "GET") {
366			if (-r "$path/index.html") {
367			$self->{path} .= "/index.html";
368			$self->handle_file;
369			} else {
370			$self->handle_dir;
371			}
372			}
373			}
374			} elsif (-f _ && -r _) {
375			-x _ and $self->err(403, "forbidden");
376			$self->handle_file;
377			} else {
378			$self->err(404, "not found");
379			}
380			}
381
382			sub handle_dir {
383			my $self = shift;
384	root	1.10	my $idx = $self->diridx;
385
386			$self->response(200, "ok",
387			{
388			"Content-Type" => "text/html",
389			"Content-Length" => length $idx,
390			},
391			$idx);
392	root	1.1	}
393
394			sub handle_file {
395			my $self = shift;
396			my $length = -s _;
397			my $hdr = {
398			"Last-Modified" => time2str ((stat _)[9]),
399			};
400
401			my @code = (200, "ok");
402			my ($l, $h);
403
404			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
405			for (split /,/, $1) {
406			if (/^-(\d+)$/) {
407			($l, $h) = ($length - $1, $length - 1);
408			} elsif (/^(\d+)-(\d*)$/) {
409			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
410			} else {
411			($l, $h) = (0, $length - 1);
412			goto ignore;
413			}
414			goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h > $l;
415			}
416			$hdr->{"Content-Range"} = "bytes */$length";
417			$self->err(416, "not satisfiable", $hdr);
418
419			satisfiable:
420	root	1.4	# check for segmented downloads
421	root	1.10	if ($l && $::NO_SEGMENTED) {
422	root	1.13	if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
423	root	1.14	Coro::Event::do_timer(after => 15);
424
425	root	1.4	$self->err(400, "segmented downloads are not allowed");
426			}
427			}
428
429	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
430			@code = (206, "partial content");
431			$length = $h - $l + 1;
432
433			ignore:
434			} else {
435			($l, $h) = (0, $length - 1);
436			}
437
438	root	1.9	$self->{path} =~ /\.([^.]+)$/;
439			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
440	root	1.1	$hdr->{"Content-Length"} = $length;
441
442	root	1.4	$self->response(@code, $hdr, "");
443	root	1.1
444			if ($self->{method} eq "GET") {
445	root	1.16	my ($fh, $buf, $r);
446			my $current = $Coro::current;
447	root	1.1	open $fh, "<", $self->{path}
448			or die "$self->{path}: late open failure ($!)";
449
450			$h -= $l - 1;
451
452			while ($h > 0) {
453	root	1.16	aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
454			$buf, 0, sub {
455			$r = $_[0];
456			$current->ready;
457			});
458			&Coro::schedule;
459			last unless $r;
460	root	1.11	my $w = $self->{fh}->syswrite($buf)
461	root	1.1	or last;
462	root	1.11	$::written += $w;
463			$self->{written} += $w;
464	root	1.16	$l += $r;
465	root	1.1	}
466			}
467
468			close $fh;
469	root	1.7	}
470
471	root	1.2	1;