Coro/myhttpd/httpd.pl

#!/usr/bin/perl

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 :(

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

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

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

my @fh;
my @pool;

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

async {
   slog 1, "accepting connections";
   while () {
      $connections->down;
      push @fh, $port->accept;
      #slog 3, "accepted @$connections ".scalar(@pool);
      if (@pool) {
         (pop @pool)->ready;
      } else {
         async \&handler;
      }

   }
};

loop;
print "ende\n";#d#

package conn;

use Socket;
use HTTP::Date;

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

sub slog {
   main::slog(@_);
}

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

   $hdr->{Date} = time2str time; # slow? nah.

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

   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;
   }

   $self->slog($msg) if $code;

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

   die bless {}, err::;
}

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");

      $req =~ /^(?:\015\012)?
                (GET|HEAD) \040+
                ([^\040]+) \040+
                HTTP\/([0-9]+\.[0-9]+)
                \015\012/gx
         or $self->err(403, "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;

      $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";
}

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 $::INDEXPROG;
      }
      Coro::State::_exit(0);
   } else {
   }
}

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

   stat $path
      or $self->err(404, "not found");

   # 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 < (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;
   $self->_cgi($::INDEXPROG);
}

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:
      $hdr->{"Content-Range"} = "bytes $l-$h/$length";
      @code = (206, "partial content");
      $length = $h - $l + 1;

ignore:
   } else {
      ($l, $h) = (0, $length - 1);
   }

   if ($self->{path} =~ /\.html$/) {
      $hdr->{"Content-Type"} = "text/html";
   } else {
      $hdr->{"Content-Type"} = "application/octet-stream";
   }

   $hdr->{"Content-Length"} = $length;

   $self->print_response(@code, $hdr, "");

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

      if ($l) {
         sysseek $fh, $l, 0
            or die "$self->{path}: cannot seek to $l ($!)";
      }

      $h -= $l - 1;

      while ($h > 0) {
         $h -= sysread $fh, $buf, $h > 4096 ? 4096 : $h;
         print {$self->{fh}} $buf
            or last;
      }
   }

   close $fh;
}
Revision:	1.1
Committed:	Thu Aug 9 02:57:54 2001 UTC (22 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#!/usr/bin/perl
2
3			use Coro;
4			use Coro::Semaphore;
5			use Coro::Event;
6			use Coro::Socket;
7
8			no utf8;
9			use bytes;
10
11			# at least on my machine, this thingy serves files
12			# quite a bit faster than apache, ;)
13			# and quite a bit slower than thttpd :(
14
15			my $port = new Coro::Socket
16			LocalAddr => $SERVER_HOST,
17			LocalPort => $SERVER_PORT,
18			ReuseAddr => 1,
19			Listen => 1,
20			or die "unable to start server";
21
22			$SIG{PIPE} = 'IGNORE';
23
24			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			my @fh;
33			my @pool;
34
35			sub handler {
36			while () {
37			my $fh = pop @fh;
38			if ($fh) {
39			eval {
40			conn->new($fh)->handle;
41			};
42			close $fh;
43			slog 1, "$@" 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			async {
54			slog 1, "accepting connections";
55			while () {
56			$connections->down;
57			push @fh, $port->accept;
58			#slog 3, "accepted @$connections ".scalar(@pool);
59			if (@pool) {
60			(pop @pool)->ready;
61			} else {
62			async \&handler;
63			}
64
65			}
66			};
67
68			loop;
69			print "ende\n";#d#
70
71			package conn;
72
73			use Socket;
74			use HTTP::Date;
75
76			sub new {
77			my $class = shift;
78			my $fh = shift;
79			my (undef, $iaddr) = unpack_sockaddr_in $fh->getpeername
80			or $self->err(500, "unable to get peername");
81			$self->{remote_address} = inet_ntoa $iaddr;
82			bless { fh => $fh }, $class;
83			}
84
85			sub slog {
86			main::slog(@_);
87			}
88
89			sub print_response {
90			my ($self, $code, $msg, $hdr, $content) = @_;
91			my $res = "HTTP/1.0 $code $msg\015\012";
92
93			$hdr->{Date} = time2str time; # slow? nah.
94
95			while (my ($h, $v) = each %$hdr) {
96			$res .= "$h: $v\015\012"
97			}
98			$res .= "\015\012$content" if defined $content;
99
100			print {$self->{fh}} $res;
101			}
102
103			sub err {
104			my $self = shift;
105			my ($code, $msg, $hdr, $content) = @_;
106
107			unless (defined $content) {
108			$content = "$code $msg";
109			$hdr->{"Content-Type"} = "text/plain";
110			$hdr->{"Content-Length"} = length $content;
111			}
112
113			$self->slog($msg) if $code;
114
115			$self->print_response($code, $msg, $hdr, $content);
116
117			die bless {}, err::;
118			}
119
120			sub handle {
121			my $self = shift;
122			my $fh = $self->{fh};
123
124			#while() {
125			$self->{h} = {};
126
127			# read request and parse first line
128			$fh->timeout($::REQ_TIMEOUT);
129			my $req = $fh->readline("\015\012\015\012");
130			$fh->timeout($::RES_TIMEOUT);
131
132			defined $req or
133			$self->err(408, "request timeout");
134
135			$req =~ /^(?:\015\012)?
136			(GET\|HEAD) \040+
137			([^\040]+) \040+
138			HTTP\/([0-9]+\.[0-9]+)
139			\015\012/gx
140			or $self->err(403, "method not allowed", { Allow => "GET,HEAD" });
141
142			$2 ne "1.0"
143			or $self->err(506, "http protocol version not supported");
144
145			$self->{method} = $1;
146			$self->{uri} = $2;
147
148			# parse headers
149			{
150			my (%hdr, $h, $v);
151
152			$hdr{lc $1} .= ",$2"
153			while $req =~ /\G
154			([^:\000-\040]+):
155			[\008\040]*
156			((?: [^\015\012]+ \| \015\012[\008\040] )*)
157			\015\012
158			/gxc;
159
160			$req =~ /\G\015\012$/
161			or $self->err(400, "bad request");
162
163			$self->{h}{$h} = substr $v, 1
164			while ($h, $v) = each %hdr;
165			}
166
167			$self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;
168
169			$self->map_uri;
170			$self->respond;
171			#}
172			}
173
174			# uri => path mapping
175			sub map_uri {
176			my $self = shift;
177			my $host = $self->{h}{host} \|\| "default";
178			my $uri = $self->{uri};
179
180			# some massaging, also makes it more secure
181			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
182			$uri =~ s%//+%/%g;
183			$uri =~ s%/\.(?=/\|$)%%g;
184			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
185
186			$uri =~ m%^/?\.\.(?=/\|$)%
187			and $self->err(400, "bad request");
188
189			$self->{name} = $uri;
190
191			# now do the path mapping
192			$self->{path} = "$::DOCROOT/$host$uri";
193			}
194
195			sub server_address {
196			my $self = shift;
197			my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
198			or $self->err(500, "unable to get socket name");
199			((inet_ntoa $iaddr), $port);
200			}
201
202			sub server_host {
203			my $self = shift;
204			if (exists $self->{h}{host}) {
205			return $self->{h}{host};
206			} else {
207			return (($self->server_address)[0]);
208			}
209			}
210
211			sub server_hostport {
212			my $self = shift;
213			my ($host, $port);
214			if (exists $self->{h}{host}) {
215			($host, $port) = ($self->{h}{host}, $self->{server_port});
216			} else {
217			($host, $port) = $self->server_address;
218			}
219			$port = $port == 80 ? "" : ":$port";
220			$host.$port;
221			}
222
223			sub _cgi {
224			my $self = shift;
225			my $path = shift;
226			my $fh;
227
228			# no two-way xxx supported
229			if (0 == fork) {
230			open STDOUT, ">&".fileno($self->{fh});
231			if (chdir $::DOCROOT) {
232			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
233			$ENV{HTTP_HOST} = $self->server_host;
234			$ENV{HTTP_PORT} = $self->{server_host};
235			$ENV{SCRIPT_NAME} = $self->{name};
236			exec $::INDEXPROG;
237			}
238			Coro::State::_exit(0);
239			} else {
240			}
241			}
242
243			sub respond {
244			my $self = shift;
245			my $path = $self->{path};
246
247			stat $path
248			or $self->err(404, "not found");
249
250			# idiotic netscape sends idiotic headers AGAIN
251			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
252			? str2time $1 : 0;
253
254			if (-d _ && -r _) {
255			# directory
256			if ($path !~ /\/$/) {
257			# create a redirect to get the trailing "/"
258			my $host = $self->server_hostport;
259			$self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" });
260			} else {
261			$ims < (stat _)[9]
262			or $self->err(304, "not modified");
263
264			if ($self->{method} eq "GET") {
265			if (-r "$path/index.html") {
266			$self->{path} .= "/index.html";
267			$self->handle_file;
268			} else {
269			$self->handle_dir;
270			}
271			}
272			}
273			} elsif (-f _ && -r _) {
274			-x _ and $self->err(403, "forbidden");
275			$self->handle_file;
276			} else {
277			$self->err(404, "not found");
278			}
279			}
280
281			sub handle_dir {
282			my $self = shift;
283			$self->_cgi($::INDEXPROG);
284			}
285
286			sub handle_file {
287			my $self = shift;
288			my $length = -s _;
289			my $hdr = {
290			"Last-Modified" => time2str ((stat _)[9]),
291			};
292
293			my @code = (200, "ok");
294			my ($l, $h);
295
296			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
297			for (split /,/, $1) {
298			if (/^-(\d+)$/) {
299			($l, $h) = ($length - $1, $length - 1);
300			} elsif (/^(\d+)-(\d*)$/) {
301			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
302			} else {
303			($l, $h) = (0, $length - 1);
304			goto ignore;
305			}
306			goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h > $l;
307			}
308			$hdr->{"Content-Range"} = "bytes */$length";
309			$self->err(416, "not satisfiable", $hdr);
310
311			satisfiable:
312			$hdr->{"Content-Range"} = "bytes $l-$h/$length";
313			@code = (206, "partial content");
314			$length = $h - $l + 1;
315
316			ignore:
317			} else {
318			($l, $h) = (0, $length - 1);
319			}
320
321			if ($self->{path} =~ /\.html$/) {
322			$hdr->{"Content-Type"} = "text/html";
323			} else {
324			$hdr->{"Content-Type"} = "application/octet-stream";
325			}
326
327			$hdr->{"Content-Length"} = $length;
328
329			$self->print_response(@code, $hdr, "");
330
331			if ($self->{method} eq "GET") {
332			my ($fh, $buf);
333			open $fh, "<", $self->{path}
334			or die "$self->{path}: late open failure ($!)";
335
336			if ($l) {
337			sysseek $fh, $l, 0
338			or die "$self->{path}: cannot seek to $l ($!)";
339			}
340
341			$h -= $l - 1;
342
343			while ($h > 0) {
344			$h -= sysread $fh, $buf, $h > 4096 ? 4096 : $h;
345			print {$self->{fh}} $buf
346			or last;
347			}
348			}
349
350			close $fh;
351			}