[ViewVC] Annotation of: cvs/Coro/eg/myhttpd

#!/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 :(

$MAX_CONNECTS = 500;                    # maximum simult. connects
$REQ_TIMEOUT  =  60;                    # request timeout
$RES_TIMEOUT  = 180;                    # response timeout
$MAX_POOL     =  20;                    # max. number of idle workers
$DOCROOT      = "/usr/www/htdocs";      # document root
$INDEXPROG    = "/usr/www/bin/dols";    # indexing program (nph-cgi script)
$SERVER_HOST  = "0.0.0.0";              # host to bind on
$SERVER_PORT  = 80;                     # port to listen on

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, 10 months ago) by root
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			$MAX_CONNECTS = 500; # maximum simult. connects
16			$REQ_TIMEOUT = 60; # request timeout
17			$RES_TIMEOUT = 180; # response timeout
18			$MAX_POOL = 20; # max. number of idle workers
19			$DOCROOT = "/usr/www/htdocs"; # document root
20			$INDEXPROG = "/usr/www/bin/dols"; # indexing program (nph-cgi script)
21			$SERVER_HOST = "0.0.0.0"; # host to bind on
22			$SERVER_PORT = 80; # port to listen on
23
24			my $port = new Coro::Socket
25			LocalAddr => $SERVER_HOST,
26			LocalPort => $SERVER_PORT,
27			ReuseAddr => 1,
28			Listen => 1,
29			or die "unable to start server";
30
31			$SIG{PIPE} = 'IGNORE';
32
33			sub slog {
34			my $level = shift;
35			my $format = shift;
36			#printf "---: $format\n", @_;
37			}
38
39			my $connections = new Coro::Semaphore $MAX_CONNECTS;
40
41			my @fh;
42			my @pool;
43
44			sub handler {
45			while () {
46			my $fh = pop @fh;
47			if ($fh) {
48			eval {
49			conn->new($fh)->handle;
50			};
51			close $fh;
52			slog 1, "$@" if $@ && !ref $@;
53			$connections->up;
54			} else {
55			last if @pool >= $MAX_POOL;
56			push @pool, $Coro::current;
57			schedule;
58			}
59			}
60			}
61
62			async {
63			slog 1, "accepting connections";
64			while () {
65			$connections->down;
66			push @fh, $port->accept;
67			#slog 3, "accepted @$connections ".scalar(@pool);
68			if (@pool) {
69			(pop @pool)->ready;
70			} else {
71			async \&handler;
72			}
73
74			}
75			};
76
77			loop;
78			print "ende\n";#d#
79
80			package conn;
81
82			use Socket;
83			use HTTP::Date;
84
85			sub new {
86			my $class = shift;
87			my $fh = shift;
88			my (undef, $iaddr) = unpack_sockaddr_in $fh->getpeername
89			or $self->err(500, "unable to get peername");
90			$self->{remote_address} = inet_ntoa $iaddr;
91			bless { fh => $fh }, $class;
92			}
93
94			sub slog {
95			main::slog(@_);
96			}
97
98			sub print_response {
99			my ($self, $code, $msg, $hdr, $content) = @_;
100			my $res = "HTTP/1.0 $code $msg\015\012";
101
102			$hdr->{Date} = time2str time; # slow? nah.
103
104			while (my ($h, $v) = each %$hdr) {
105			$res .= "$h: $v\015\012"
106			}
107			$res .= "\015\012$content" if defined $content;
108
109			print {$self->{fh}} $res;
110			}
111
112			sub err {
113			my $self = shift;
114			my ($code, $msg, $hdr, $content) = @_;
115
116			unless (defined $content) {
117			$content = "$code $msg";
118			$hdr->{"Content-Type"} = "text/plain";
119			$hdr->{"Content-Length"} = length $content;
120			}
121
122			$self->slog($msg) if $code;
123
124			$self->print_response($code, $msg, $hdr, $content);
125
126			die bless {}, err::;
127			}
128
129			sub handle {
130			my $self = shift;
131			my $fh = $self->{fh};
132
133			#while() {
134			$self->{h} = {};
135
136			# read request and parse first line
137			$fh->timeout($::REQ_TIMEOUT);
138			my $req = $fh->readline("\015\012\015\012");
139			$fh->timeout($::RES_TIMEOUT);
140
141			defined $req or
142			$self->err(408, "request timeout");
143
144			$req =~ /^(?:\015\012)?
145			(GET\|HEAD) \040+
146			([^\040]+) \040+
147			HTTP\/([0-9]+\.[0-9]+)
148			\015\012/gx
149			or $self->err(403, "method not allowed", { Allow => "GET,HEAD" });
150
151			$2 ne "1.0"
152			or $self->err(506, "http protocol version not supported");
153
154			$self->{method} = $1;
155			$self->{uri} = $2;
156
157			# parse headers
158			{
159			my (%hdr, $h, $v);
160
161			$hdr{lc $1} .= ",$2"
162			while $req =~ /\G
163			([^:\000-\040]+):
164			[\008\040]*
165			((?: [^\015\012]+ \| \015\012[\008\040] )*)
166			\015\012
167			/gxc;
168
169			$req =~ /\G\015\012$/
170			or $self->err(400, "bad request");
171
172			$self->{h}{$h} = substr $v, 1
173			while ($h, $v) = each %hdr;
174			}
175
176			$self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80;
177
178			$self->map_uri;
179			$self->respond;
180			#}
181			}
182
183			# uri => path mapping
184			sub map_uri {
185			my $self = shift;
186			my $host = $self->{h}{host} \|\| "default";
187			my $uri = $self->{uri};
188
189			# some massaging, also makes it more secure
190			$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
191			$uri =~ s%//+%/%g;
192			$uri =~ s%/\.(?=/\|$)%%g;
193			1 while $uri =~ s%/[^/]+/\.\.(?=/\|$)%%;
194
195			$uri =~ m%^/?\.\.(?=/\|$)%
196			and $self->err(400, "bad request");
197
198			$self->{name} = $uri;
199
200			# now do the path mapping
201			$self->{path} = "$::DOCROOT/$host$uri";
202			}
203
204			sub server_address {
205			my $self = shift;
206			my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
207			or $self->err(500, "unable to get socket name");
208			((inet_ntoa $iaddr), $port);
209			}
210
211			sub server_host {
212			my $self = shift;
213			if (exists $self->{h}{host}) {
214			return $self->{h}{host};
215			} else {
216			return (($self->server_address)[0]);
217			}
218			}
219
220			sub server_hostport {
221			my $self = shift;
222			my ($host, $port);
223			if (exists $self->{h}{host}) {
224			($host, $port) = ($self->{h}{host}, $self->{server_port});
225			} else {
226			($host, $port) = $self->server_address;
227			}
228			$port = $port == 80 ? "" : ":$port";
229			$host.$port;
230			}
231
232			sub _cgi {
233			my $self = shift;
234			my $path = shift;
235			my $fh;
236
237			# no two-way xxx supported
238			if (0 == fork) {
239			open STDOUT, ">&".fileno($self->{fh});
240			if (chdir $::DOCROOT) {
241			$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
242			$ENV{HTTP_HOST} = $self->server_host;
243			$ENV{HTTP_PORT} = $self->{server_host};
244			$ENV{SCRIPT_NAME} = $self->{name};
245			exec $::INDEXPROG;
246			}
247			Coro::State::_exit(0);
248			} else {
249			}
250			}
251
252			sub respond {
253			my $self = shift;
254			my $path = $self->{path};
255
256			stat $path
257			or $self->err(404, "not found");
258
259			# idiotic netscape sends idiotic headers AGAIN
260			my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
261			? str2time $1 : 0;
262
263			if (-d _ && -r _) {
264			# directory
265			if ($path !~ /\/$/) {
266			# create a redirect to get the trailing "/"
267			my $host = $self->server_hostport;
268			$self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" });
269			} else {
270			$ims < (stat _)[9]
271			or $self->err(304, "not modified");
272
273			if ($self->{method} eq "GET") {
274			if (-r "$path/index.html") {
275			$self->{path} .= "/index.html";
276			$self->handle_file;
277			} else {
278			$self->handle_dir;
279			}
280			}
281			}
282			} elsif (-f _ && -r _) {
283			-x _ and $self->err(403, "forbidden");
284			$self->handle_file;
285			} else {
286			$self->err(404, "not found");
287			}
288			}
289
290			sub handle_dir {
291			my $self = shift;
292			$self->_cgi($::INDEXPROG);
293			}
294
295			sub handle_file {
296			my $self = shift;
297			my $length = -s _;
298			my $hdr = {
299			"Last-Modified" => time2str ((stat _)[9]),
300			};
301
302			my @code = (200, "ok");
303			my ($l, $h);
304
305			if ($self->{h}{range} =~ /^bytes=(.*)$/) {
306			for (split /,/, $1) {
307			if (/^-(\d+)$/) {
308			($l, $h) = ($length - $1, $length - 1);
309			} elsif (/^(\d+)-(\d*)$/) {
310			($l, $h) = ($1, ($2 ne "" \|\| $2 >= $length) ? $2 : $length - 1);
311			} else {
312			($l, $h) = (0, $length - 1);
313			goto ignore;
314			}
315			goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h > $l;
316			}
317			$hdr->{"Content-Range"} = "bytes */$length";
318			$self->err(416, "not satisfiable", $hdr);
319
320			satisfiable:
321			$hdr->{"Content-Range"} = "bytes $l-$h/$length";
322			@code = (206, "partial content");
323			$length = $h - $l + 1;
324
325			ignore:
326			} else {
327			($l, $h) = (0, $length - 1);
328			}
329
330			if ($self->{path} =~ /\.html$/) {
331			$hdr->{"Content-Type"} = "text/html";
332			} else {
333			$hdr->{"Content-Type"} = "application/octet-stream";
334			}
335
336			$hdr->{"Content-Length"} = $length;
337
338			$self->print_response(@code, $hdr, "");
339
340			if ($self->{method} eq "GET") {
341			my ($fh, $buf);
342			open $fh, "<", $self->{path}
343			or die "$self->{path}: late open failure ($!)";
344
345			if ($l) {
346			sysseek $fh, $l, 0
347			or die "$self->{path}: cannot seek to $l ($!)";
348			}
349
350			$h -= $l - 1;
351
352			while ($h > 0) {
353			$h -= sysread $fh, $buf, $h > 4096 ? 4096 : $h;
354			print {$self->{fh}} $buf
355			or last;
356			}
357			}
358
359			close $fh;
360			}