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1 | package Catalyst::Engine::HTTP; |
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2 | |
3 | use strict; |
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4 | use base 'Catalyst::Engine::CGI'; |
5 | use Errno 'EWOULDBLOCK'; |
6 | use HTTP::Status; |
7 | use NEXT; |
8 | use Socket; |
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9 | use IO::Socket::INET (); |
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10 | use IO::Select (); |
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11 | |
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12 | # For PAR |
13 | require Catalyst::Engine::HTTP::Restarter; |
14 | require Catalyst::Engine::HTTP::Restarter::Watcher; |
15 | |
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16 | =head1 NAME |
17 | |
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18 | Catalyst::Engine::HTTP - Catalyst HTTP Engine |
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19 | |
20 | =head1 SYNOPSIS |
21 | |
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22 | A script using the Catalyst::Engine::HTTP module might look like: |
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23 | |
24 | #!/usr/bin/perl -w |
25 | |
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26 | BEGIN { $ENV{CATALYST_ENGINE} = 'HTTP' } |
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27 | |
28 | use strict; |
29 | use lib '/path/to/MyApp/lib'; |
30 | use MyApp; |
31 | |
32 | MyApp->run; |
33 | |
34 | =head1 DESCRIPTION |
35 | |
36 | This is the Catalyst engine specialized for development and testing. |
37 | |
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38 | =head1 METHODS |
39 | |
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40 | =head2 $self->finalize_headers($c) |
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41 | |
42 | =cut |
43 | |
44 | sub finalize_headers { |
45 | my ( $self, $c ) = @_; |
46 | my $protocol = $c->request->protocol; |
47 | my $status = $c->response->status; |
48 | my $message = status_message($status); |
49 | print "$protocol $status $message\015\012"; |
50 | $c->response->headers->date(time); |
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51 | $c->response->headers->header( |
52 | Connection => $self->_keep_alive ? 'keep-alive' : 'close' ); |
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53 | $self->NEXT::finalize_headers($c); |
54 | } |
55 | |
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56 | =head2 $self->finalize_read($c) |
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57 | |
58 | =cut |
59 | |
60 | sub finalize_read { |
61 | my ( $self, $c ) = @_; |
62 | |
63 | # Never ever remove this, it would result in random length output |
64 | # streams if STDIN eq STDOUT (like in the HTTP engine) |
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65 | *STDIN->blocking(1); |
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66 | |
67 | return $self->NEXT::finalize_read($c); |
68 | } |
69 | |
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70 | =head2 $self->prepare_read($c) |
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71 | |
72 | =cut |
73 | |
74 | sub prepare_read { |
75 | my ( $self, $c ) = @_; |
76 | |
77 | # Set the input handle to non-blocking |
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78 | *STDIN->blocking(0); |
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79 | |
80 | return $self->NEXT::prepare_read($c); |
81 | } |
82 | |
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83 | =head2 $self->read_chunk($c, $buffer, $length) |
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84 | |
85 | =cut |
86 | |
87 | sub read_chunk { |
88 | my $self = shift; |
89 | my $c = shift; |
90 | |
91 | # support for non-blocking IO |
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92 | my $rin = ''; |
93 | vec( $rin, *STDIN->fileno, 1 ) = 1; |
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94 | |
95 | READ: |
96 | { |
97 | select( $rin, undef, undef, undef ); |
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98 | my $rc = *STDIN->sysread(@_); |
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99 | if ( defined $rc ) { |
100 | return $rc; |
101 | } |
102 | else { |
103 | next READ if $! == EWOULDBLOCK; |
104 | return; |
105 | } |
106 | } |
107 | } |
108 | |
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109 | =head2 run |
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110 | |
111 | =cut |
112 | |
113 | # A very very simple HTTP server that initializes a CGI environment |
114 | sub run { |
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115 | my ( $self, $class, $port, $host, $options ) = @_; |
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116 | |
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117 | $options ||= {}; |
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118 | |
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119 | my $restart = 0; |
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120 | local $SIG{CHLD} = 'IGNORE'; |
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121 | |
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122 | my $allowed = $options->{allowed} || { '127.0.0.1' => '255.255.255.255' }; |
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123 | my $addr = $host ? inet_aton($host) : INADDR_ANY; |
124 | if ( $addr eq INADDR_ANY ) { |
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125 | require Sys::Hostname; |
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126 | $host = lc Sys::Hostname::hostname(); |
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127 | } |
128 | else { |
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129 | $host = gethostbyaddr( $addr, AF_INET ) || inet_ntoa($addr); |
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130 | } |
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131 | |
132 | # Handle requests |
133 | |
134 | # Setup socket |
135 | my $daemon = IO::Socket::INET->new( |
136 | Listen => SOMAXCONN, |
137 | LocalAddr => inet_ntoa($addr), |
138 | LocalPort => $port, |
139 | Proto => 'tcp', |
140 | ReuseAddr => 1, |
141 | Type => SOCK_STREAM, |
142 | ) |
143 | or die "Couldn't create daemon: $!"; |
144 | |
145 | my $url = "http://$host"; |
146 | $url .= ":$port" unless $port == 80; |
147 | |
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148 | print "You can connect to your server at $url\n"; |
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149 | |
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150 | $self->_keep_alive( $options->{keepalive} || 0 ); |
151 | |
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152 | my $parent = $$; |
153 | my $pid = undef; |
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154 | while ( accept( Remote, $daemon ) ) |
155 | { # TODO: get while ( my $remote = $daemon->accept ) to work |
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156 | |
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157 | select Remote; |
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158 | |
159 | # Request data |
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160 | |
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161 | Remote->blocking(1); |
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162 | |
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163 | next |
164 | unless my ( $method, $uri, $protocol ) = |
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165 | $self->_parse_request_line( \*Remote ); |
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166 | |
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167 | unless ( uc($method) eq 'RESTART' ) { |
168 | |
169 | # Fork |
170 | if ( $options->{fork} ) { next if $pid = fork } |
171 | |
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172 | $self->_handler( $class, $port, $method, $uri, $protocol ); |
173 | |
174 | $daemon->close if defined $pid; |
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175 | |
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176 | } |
177 | else { |
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178 | my $sockdata = $self->_socket_data( \*Remote ); |
179 | my $ipaddr = _inet_addr( $sockdata->{peeraddr} ); |
180 | my $ready = 0; |
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181 | while ( my ( $ip, $mask ) = each %$allowed and not $ready ) { |
182 | $ready = ( $ipaddr & _inet_addr($mask) ) == _inet_addr($ip); |
183 | } |
184 | if ($ready) { |
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185 | $restart = 1; |
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186 | last; |
187 | } |
188 | } |
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189 | |
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190 | exit if defined $pid; |
191 | } |
192 | continue { |
193 | close Remote; |
194 | } |
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195 | $daemon->close; |
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196 | |
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197 | if ($restart) { |
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198 | $SIG{CHLD} = 'DEFAULT'; |
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199 | wait; |
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200 | exec $^X . ' "' . $0 . '" ' . join( ' ', @{ $options->{argv} } ); |
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201 | } |
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202 | |
203 | exit; |
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204 | } |
205 | |
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206 | sub _handler { |
207 | my ( $self, $class, $port, $method, $uri, $protocol ) = @_; |
208 | |
209 | # Ignore broken pipes as an HTTP server should |
210 | local $SIG{PIPE} = sub { close Remote }; |
211 | |
212 | local *STDIN = \*Remote; |
213 | local *STDOUT = \*Remote; |
214 | |
215 | # We better be careful and just use 1.0 |
216 | $protocol = '1.0'; |
217 | |
218 | my $sockdata = $self->_socket_data( \*Remote ); |
219 | my %copy_of_env = %ENV; |
220 | |
221 | my $sel = IO::Select->new; |
222 | $sel->add( \*STDIN ); |
223 | |
224 | while (1) { |
225 | my ( $path, $query_string ) = split /\?/, $uri, 2; |
226 | |
227 | # Initialize CGI environment |
228 | local %ENV = ( |
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229 | PATH_INFO => $path || '', |
230 | QUERY_STRING => $query_string || '', |
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231 | REMOTE_ADDR => $sockdata->{peeraddr}, |
232 | REMOTE_HOST => $sockdata->{peername}, |
233 | REQUEST_METHOD => $method || '', |
234 | SERVER_NAME => $sockdata->{localname}, |
235 | SERVER_PORT => $port, |
236 | SERVER_PROTOCOL => "HTTP/$protocol", |
237 | %copy_of_env, |
238 | ); |
239 | |
240 | # Parse headers |
241 | if ( $protocol >= 1 ) { |
242 | while (1) { |
243 | my $line = $self->_get_line( \*STDIN ); |
244 | last if $line eq ''; |
245 | next |
246 | unless my ( $name, $value ) = |
247 | $line =~ m/\A(\w(?:-?\w+)*):\s(.+)\z/; |
248 | |
249 | $name = uc $name; |
250 | $name = 'COOKIE' if $name eq 'COOKIES'; |
251 | $name =~ tr/-/_/; |
252 | $name = 'HTTP_' . $name |
253 | unless $name =~ m/\A(?:CONTENT_(?:LENGTH|TYPE)|COOKIE)\z/; |
254 | if ( exists $ENV{$name} ) { |
255 | $ENV{$name} .= "; $value"; |
256 | } |
257 | else { |
258 | $ENV{$name} = $value; |
259 | } |
260 | } |
261 | } |
262 | |
263 | # Pass flow control to Catalyst |
264 | $class->handle_request; |
265 | |
266 | my $connection = lc $ENV{HTTP_CONNECTION}; |
267 | last |
268 | unless $self->_keep_alive() |
269 | && index( $connection, 'keep-alive' ) > -1 |
270 | && index( $connection, 'te' ) == -1 # opera stuff |
271 | && $sel->can_read(5); |
272 | |
273 | last |
274 | unless ( $method, $uri, $protocol ) = |
275 | $self->_parse_request_line( \*STDIN ); |
276 | } |
277 | |
278 | close Remote; |
279 | } |
280 | |
281 | sub _keep_alive { |
282 | my ( $self, $keepalive ) = @_; |
283 | |
284 | my $r = $self->{_keepalive} || 0; |
285 | $self->{_keepalive} = $keepalive if defined $keepalive; |
286 | |
287 | return $r; |
288 | |
289 | } |
290 | |
291 | sub _parse_request_line { |
292 | my ( $self, $handle ) = @_; |
293 | |
294 | # Parse request line |
295 | my $line = $self->_get_line($handle); |
296 | return () |
297 | unless my ( $method, $uri, $protocol ) = |
298 | $line =~ m/\A(\w+)\s+(\S+)(?:\s+HTTP\/(\d+(?:\.\d+)?))?\z/; |
299 | return ( $method, $uri, $protocol ); |
300 | } |
301 | |
302 | sub _socket_data { |
303 | my ( $self, $handle ) = @_; |
304 | |
305 | my $remote_sockaddr = getpeername($handle); |
306 | my ( undef, $iaddr ) = sockaddr_in($remote_sockaddr); |
307 | my $local_sockaddr = getsockname($handle); |
308 | my ( undef, $localiaddr ) = sockaddr_in($local_sockaddr); |
309 | |
310 | my $data = { |
311 | peername => gethostbyaddr( $iaddr, AF_INET ) || "localhost", |
312 | peeraddr => inet_ntoa($iaddr) || "127.0.0.1", |
313 | localname => gethostbyaddr( $localiaddr, AF_INET ) || "localhost", |
314 | localaddr => inet_ntoa($localiaddr) || "127.0.0.1", |
315 | }; |
316 | |
317 | return $data; |
318 | } |
319 | |
fbcc39ad |
320 | sub _get_line { |
321 | my ( $self, $handle ) = @_; |
322 | |
323 | my $line = ''; |
324 | |
325 | while ( sysread( $handle, my $byte, 1 ) ) { |
326 | last if $byte eq "\012"; # eol |
327 | $line .= $byte; |
328 | } |
329 | |
330 | 1 while $line =~ s/\s\z//; |
331 | |
332 | return $line; |
333 | } |
334 | |
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335 | sub _inet_addr { unpack "N*", inet_aton( $_[0] ) } |
336 | |
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337 | =head1 SEE ALSO |
338 | |
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339 | L<Catalyst>, L<Catalyst::Engine>. |
340 | |
341 | =head1 AUTHORS |
342 | |
343 | Sebastian Riedel, <sri@cpan.org> |
344 | |
345 | Dan Kubb, <dan.kubb-cpan@onautopilot.com> |
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346 | |
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347 | Sascha Kiefer, <esskar@cpan.org> |
348 | |
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349 | =head1 THANKS |
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350 | |
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351 | Many parts are ripped out of C<HTTP::Server::Simple> by Jesse Vincent. |
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352 | |
353 | =head1 COPYRIGHT |
354 | |
355 | This program is free software, you can redistribute it and/or modify it under |
356 | the same terms as Perl itself. |
357 | |
358 | =cut |
359 | |
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360 | 1; |