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';

our $accesslog;

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;
   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;

my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;

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 $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--;

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

# end of connection
sub eoconn {
   my $self = shift;
   delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
}

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

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

   $self->{h}{connection} ||= $hdr->{Connection};

   $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";

   my $log = "$self->{remote_addr} \"$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";
      $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);
      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) {
         my $delay = 120;
         while (%{$conn{$ip}} > $::MAX_CONN_IP) {
            if ($delay <= 0) {
               $self->slog(2, "blocked ip $ip");
               $self->err_blocked;
            } else {
               Coro::Event::do_timer(after => 3);
               $delay -= 3;
            }
         }
      }

      $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;
      }

      # 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}->getsockname
               or $self->err(500, "unable to get socket name");
         $host = inet_ntoa $host;
      }

      $self->{server_name} = $host;

      # remote id should be unique per user
      $self->{remote_id} = $self->{remote_addr};

      if (exists $self->{h}{"client-ip"}) {
         $self->{remote_id} .= "[".$self->{h}{"client-ip"}."]";
      } elsif (exists $self->{h}{"x-forwarded-for"}) {
         $self->{remote_id} .= "[".$self->{h}{"x-forwarded-for"}."]";
      }

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

      eval {
         $self->map_uri;
         $self->respond;
      };

      $self->eoconn;

      die if $@ && !ref $@;

      last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;

      $fh->timeout($::PER_TIMEOUT);
   }
}

# 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};

   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") {
            $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";
      $hdr->{"Content-Length"} = $length;
      $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
      $self->err(416, "not satisfiable", $hdr, "");

satisfiable:
      # check for segmented downloads
      if ($l && $::NO_SEGMENTED) {
         my $delay = 180;
         while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
            if ($delay <= 0) {
               $self->err_segmented_download;
            } else {
               Coro::Event::do_timer(after => 3); $delay -= 3;
            }
         }
      }

      $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;

      if (0) {
         if ($l) {
            sysseek $fh, $l, 0;
         }
      }

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

   close $fh;
}

1;
Revision:	1.31
Committed:	Mon Aug 27 05:05:26 2001 UTC (22 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.30:	+10 -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
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	root	1.27
15			our $accesslog;
16
17			if ($ACCESS_LOG) {
18			use IO::Handle;
19			open $accesslog, ">>$ACCESS_LOG"
20			or die "$ACCESS_LOG: $!";
21			$accesslog->autoflush(1);
22			}
23
24	root	1.1	sub slog {
25			my $level = shift;
26			my $format = shift;
27			printf "---: $format\n", @_;
28			}
29
30			my $connections = new Coro::Semaphore $MAX_CONNECTS;
31
32	root	1.6	my @newcons;
33	root	1.1	my @pool;
34
35	root	1.2	# one "execution thread"
36	root	1.1	sub handler {
37			while () {
38	root	1.6	my $new = pop @newcons;
39			if ($new) {
40	root	1.1	eval {
41	root	1.6	conn->new(@$new)->handle;
42	root	1.1	};
43			slog 1, "$@" if $@ && !ref $@;
44			$connections->up;
45			} else {
46			last if @pool >= $MAX_POOL;
47			push @pool, $Coro::current;
48			schedule;
49			}
50			}
51			}
52
53	root	1.4	my $http_port = new Coro::Socket
54			LocalAddr => $SERVER_HOST,
55			LocalPort => $SERVER_PORT,
56			ReuseAddr => 1,
57	root	1.13	Listen => 50,
58	root	1.4	or die "unable to start server";
59
60			push @listen_sockets, $http_port;
61
62	root	1.2	# the "main thread"
63	root	1.1	async {
64			slog 1, "accepting connections";
65			while () {
66			$connections->down;
67	root	1.6	push @newcons, [$http_port->accept];
68	root	1.1	#slog 3, "accepted @$connections ".scalar(@pool);
69	root	1.3	$::NOW = time;
70	root	1.1	if (@pool) {
71			(pop @pool)->ready;
72			} else {
73			async \&handler;
74			}
75
76			}
77			};
78
79			package conn;
80
81			use Socket;
82			use HTTP::Date;
83	root	1.2	use Convert::Scalar 'weaken';
84	root	1.16	use Linux::AIO;
85
86			Linux::AIO::min_parallel $::AIO_PARALLEL;
87
88	root	1.29	my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;
89
90	root	1.16	Event->io(fd => Linux::AIO::poll_fileno,
91	root	1.17	poll => 'r', async => 1,
92	root	1.21	cb => \&Linux::AIO::poll_cb);
93	root	1.16
94	root	1.26	our %conn; # $conn{ip}{self} => connobj
95			our %uri; # $uri{ip}{uri}{self}
96	root	1.3	our %blocked;
97	root	1.9	our %mimetype;
98
99			sub read_mimetypes {
100			local *M;
101	root	1.10	if (open M, "<mime_types") {
102	root	1.9	while (<M>) {
103			if (/^([^#]\S+)\t+(\S+)$/) {
104			$mimetype{lc $1} = $2;
105			}
106			}
107			} else {
108	root	1.10	print "cannot open mime_types\n";
109	root	1.9	}
110			}
111	root	1.1
112	root	1.10	read_mimetypes;
113
114	root	1.1	sub new {
115			my $class = shift;
116	root	1.6	my $peername = shift;
117	root	1.1	my $fh = shift;
118	root	1.2	my $self = bless { fh => $fh }, $class;
119	root	1.6	my (undef, $iaddr) = unpack_sockaddr_in $peername
120			or $self->err(500, "unable to decode peername");
121	root	1.7
122	root	1.3	$self->{remote_addr} = inet_ntoa $iaddr;
123	root	1.11	$self->{time} = $::NOW;
124	root	1.2
125			# enter ourselves into various lists
126	root	1.3	weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
127
128	root	1.13	$::conns++;
129
130	root	1.2	$self;
131			}
132
133			sub DESTROY {
134			my $self = shift;
135	root	1.13
136			$::conns--;
137
138	root	1.19	$self->eoconn;
139	root	1.3	delete $conn{$self->{remote_addr}}{$self*1};
140	root	1.19	}
141
142			# end of connection
143			sub eoconn {
144	root	1.26	my $self = shift;
145	root	1.13	delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1};
146	root	1.1	}
147
148			sub slog {
149	root	1.4	my $self = shift;
150	root	1.29	main::slog($_[0], ($self->{remote_id} \|\| $self->{remote_addr}) ."> $_[1]");
151	root	1.1	}
152
153	root	1.4	sub response {
154	root	1.1	my ($self, $code, $msg, $hdr, $content) = @_;
155	root	1.17	my $res = "HTTP/1.1 $code $msg\015\012";
156	root	1.1
157	root	1.28	$self->{h}{connection} \|\|= $hdr->{Connection};
158
159	root	1.4	$res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :(
160	root	1.1
161			while (my ($h, $v) = each %$hdr) {
162			$res .= "$h: $v\015\012"
163			}
164	root	1.10	$res .= "\015\012";
165	root	1.4
166	root	1.13	$res .= $content if defined $content and $self->{method} ne "HEAD";
167	root	1.1
168	root	1.27	my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
169
170			print $accesslog $log if $accesslog;
171			print STDERR $log;
172	root	1.2
173	root	1.11	$self->{written} +=
174			print {$self->{fh}} $res;
175	root	1.1	}
176
177			sub err {
178			my $self = shift;
179			my ($code, $msg, $hdr, $content) = @_;
180
181			unless (defined $content) {
182			$content = "$code $msg";
183			$hdr->{"Content-Type"} = "text/plain";
184			$hdr->{"Content-Length"} = length $content;
185			}
186	root	1.17	$hdr->{"Connection"} = "close";
187	root	1.1
188	root	1.4	$self->response($code, $msg, $hdr, $content);
189	root	1.1
190			die bless {}, err::;
191			}
192
193			sub handle {
194			my $self = shift;
195			my $fh = $self->{fh};
196
197	root	1.29	my $host;
198
199	root	1.17	$fh->timeout($::REQ_TIMEOUT);
200			while() {
201			$self->{reqs}++;
202	root	1.1
203			# read request and parse first line
204			my $req = $fh->readline("\015\012\015\012");
205
206	root	1.17	unless (defined $req) {
207			if (exists $self->{version}) {
208			last;
209			} else {
210			$self->err(408, "request timeout");
211			}
212			}
213
214			$self->{h} = {};
215	root	1.1
216	root	1.17	$fh->timeout($::RES_TIMEOUT);
217	root	1.3	my $ip = $self->{remote_addr};
218
219			if ($blocked{$ip}) {
220			$self->err_blocked($blocked{$ip})
221			if $blocked{$ip} > $::NOW;
222
223			delete $blocked{$ip};
224			}
225
226			if (%{$conn{$ip}} > $::MAX_CONN_IP) {
227	root	1.31	my $delay = 120;
228			while (%{$conn{$ip}} > $::MAX_CONN_IP) {
229			if ($delay <= 0) {
230			$self->slog(2, "blocked ip $ip");
231			$self->err_blocked;
232			} else {
233			Coro::Event::do_timer(after => 3);
234			$delay -= 3;
235			}
236			}
237	root	1.3	}
238
239	root	1.1	$req =~ /^(?:\015\012)?
240			(GET\|HEAD) \040+
241			([^\040]+) \040+
242			HTTP\/([0-9]+\.[0-9]+)
243			\015\012/gx
244	root	1.14	or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
245	root	1.1
246			$self->{method} = $1;
247			$self->{uri} = $2;
248	root	1.17	$self->{version} = $3;
249
250	root	1.20	$3 =~ /^1\./
251	root	1.17	or $self->err(506, "http protocol version $3 not supported");
252	root	1.1
253			# parse headers
254			{
255			my (%hdr, $h, $v);
256
257			$hdr{lc $1} .= ",$2"
258			while $req =~ /\G
259			([^:\000-\040]+):
260			[\008\040]*
261			((?: [^\015\012]+ \| \015\012[\008\040] )*)
262			\015\012
263			/gxc;
264
265			$req =~ /\G\015\012$/
266			or $self->err(400, "bad request");
267
268			$self->{h}{$h} = substr $v, 1
269			while ($h, $v) = each %hdr;
270			}
271
272	root	1.29	# find out server name and port
273			if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
274			$host = $1;
275			} else {
276			$host = $self->{h}{host};
277			}
278
279			if (defined $host) {
280			$self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
281			} else {
282			($self->{server_port}, $host)
283			= unpack_sockaddr_in $self->{fh}->getsockname
284			or $self->err(500, "unable to get socket name");
285			$host = inet_ntoa $host;
286			}
287
288			$self->{server_name} = $host;
289
290			# remote id should be unique per user
291			$self->{remote_id} = $self->{remote_addr};
292
293			if (exists $self->{h}{"client-ip"}) {
294			$self->{remote_id} .= "[".$self->{h}{"client-ip"}."]";
295			} elsif (exists $self->{h}{"x-forwarded-for"}) {
296			$self->{remote_id} .= "[".$self->{h}{"x-forwarded-for"}."]";
297			}
298	root	1.3
299	root	1.13	weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self);
300	root	1.1
301	root	1.24	eval {
302			$self->map_uri;
303			$self->respond;
304			};
305
306	root	1.26	$self->eoconn;
307
308	root	1.24	die if $@ && !ref $@;
309	root	1.17
310	root	1.29	last if $self->{h}{connection} =~ /close/ \|\| $self->{version} < 1.1;
311	root	1.17
312			$fh->timeout($::PER_TIMEOUT);
313			}
314	root	1.1	}
315
316			# uri => path mapping
317			sub map_uri {
318			my $self = shift;
319	root	1.29	my $host = $self->{server_name};
320	root	1.1	my $uri = $self->{uri};
321
322			# some massaging, also makes it more secure
323			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
324			$uri =~ s%//+%/%g;
325			$uri =~ s%/\.(?=/\|$)%%g;
326			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
327
328			$uri =~ m%^/?\.\.(?=/\|$)%
329			and $self->err(400, "bad request");
330
331			$self->{name} = $uri;
332
333			# now do the path mapping
334			$self->{path} = "$::DOCROOT/$host$uri";
335	root	1.7
336			$self->access_check;
337	root	1.1	}
338
339			sub _cgi {
340			my $self = shift;
341			my $path = shift;
342			my $fh;
343
344			# no two-way xxx supported
345			if (0 == fork) {
346			open STDOUT, ">&".fileno($self->{fh});
347			if (chdir $::DOCROOT) {
348			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
349	root	1.29	$ENV{HTTP_HOST} = $self->{server_name};
350			$ENV{HTTP_PORT} = $self->{server_port};
351	root	1.1	$ENV{SCRIPT_NAME} = $self->{name};
352	root	1.10	exec $path;
353	root	1.1	}
354			Coro::State::_exit(0);
355			} else {
356	root	1.29	die;
357	root	1.1	}
358			}
359
360	root	1.29	sub server_hostport {
361			$_[0]{server_port} == 80
362			? $_[0]{server_name}
363			: "$_[0]{server_name}:$_[0]{server_port}";
364			}
365
366	root	1.1	sub respond {
367			my $self = shift;
368			my $path = $self->{path};
369
370			stat $path
371			or $self->err(404, "not found");
372
373	root	1.10	$self->{stat} = [stat _];
374
375	root	1.1	# idiotic netscape sends idiotic headers AGAIN
376			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
377			? str2time $1 : 0;
378
379			if (-d _ && -r _) {
380			# directory
381			if ($path !~ /\/$/) {
382			# create a redirect to get the trailing "/"
383	root	1.29	# we don't try to avoid the :80
384			$self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
385	root	1.1	} else {
386	root	1.10	$ims < $self->{stat}[9]
387	root	1.1	or $self->err(304, "not modified");
388
389	root	1.25	if (-r "$path/index.html") {
390			$self->{path} .= "/index.html";
391			$self->handle_file;
392			} else {
393			$self->handle_dir;
394	root	1.1	}
395			}
396			} elsif (-f _ && -r _) {
397			-x _ and $self->err(403, "forbidden");
398			$self->handle_file;
399			} else {
400			$self->err(404, "not found");
401			}
402			}
403
404			sub handle_dir {
405			my $self = shift;
406	root	1.10	my $idx = $self->diridx;
407
408			$self->response(200, "ok",
409			{
410			"Content-Type" => "text/html",
411			"Content-Length" => length $idx,
412			},
413			$idx);
414	root	1.1	}
415
416			sub handle_file {
417			my $self = shift;
418			my $length = -s _;
419			my $hdr = {
420			"Last-Modified" => time2str ((stat _)[9]),
421			};
422
423			my @code = (200, "ok");
424			my ($l, $h);
425
426			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
427			for (split /,/, $1) {
428			if (/^-(\d+)$/) {
429			($l, $h) = ($length - $1, $length - 1);
430			} elsif (/^(\d+)-(\d*)$/) {
431			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
432			} else {
433			($l, $h) = (0, $length - 1);
434			goto ignore;
435			}
436	root	1.26	goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
437	root	1.1	}
438			$hdr->{"Content-Range"} = "bytes */$length";
439	root	1.24	$hdr->{"Content-Length"} = $length;
440	root	1.20	$self->slog(9, "not satisfiable($self->{h}{range}\|".$self->{h}{"user-agent"}.")");
441	root	1.24	$self->err(416, "not satisfiable", $hdr, "");
442	root	1.1
443			satisfiable:
444	root	1.4	# check for segmented downloads
445	root	1.10	if ($l && $::NO_SEGMENTED) {
446	root	1.30	my $delay = 180;
447	root	1.29	while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) {
448			if ($delay <= 0) {
449	root	1.30	$self->err_segmented_download;
450	root	1.29	} else {
451			Coro::Event::do_timer(after => 3); $delay -= 3;
452			}
453	root	1.4	}
454			}
455
456	root	1.1	$hdr->{"Content-Range"} = "bytes $l-$h/$length";
457			@code = (206, "partial content");
458			$length = $h - $l + 1;
459
460			ignore:
461			} else {
462			($l, $h) = (0, $length - 1);
463			}
464
465	root	1.9	$self->{path} =~ /\.([^.]+)$/;
466			$hdr->{"Content-Type"} = $mimetype{lc $1} \|\| "application/octet-stream";
467	root	1.1	$hdr->{"Content-Length"} = $length;
468
469	root	1.4	$self->response(@code, $hdr, "");
470	root	1.1
471			if ($self->{method} eq "GET") {
472	root	1.16	my ($fh, $buf, $r);
473			my $current = $Coro::current;
474	root	1.1	open $fh, "<", $self->{path}
475			or die "$self->{path}: late open failure ($!)";
476
477			$h -= $l - 1;
478
479	root	1.19	if (0) {
480			if ($l) {
481			sysseek $fh, $l, 0;
482			}
483			}
484
485	root	1.1	while ($h > 0) {
486	root	1.19	if (0) {
487			sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
488			or last;
489			} else {
490	root	1.29	undef $buf;
491			$aio_requests->down;
492	root	1.19	aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
493			$buf, 0, sub {
494			$r = $_[0];
495			$current->ready;
496			});
497			&Coro::schedule;
498	root	1.29	$aio_requests->up;
499	root	1.19	last unless $r;
500			}
501	root	1.11	my $w = $self->{fh}->syswrite($buf)
502	root	1.1	or last;
503	root	1.11	$::written += $w;
504			$self->{written} += $w;
505	root	1.16	$l += $r;
506	root	1.1	}
507			}
508
509			close $fh;
510	root	1.7	}
511
512	root	1.2	1;