1 package Catalyst::Engine;
4 with 'MooseX::Emulate::Class::Accessor::Fast';
6 use CGI::Simple::Cookie;
7 use Data::Dump qw/dump/;
8 use Errno 'EWOULDBLOCK';
14 use Catalyst::EngineLoader;
18 use namespace::clean -except => 'meta';
20 # Amount of data to read from input on each pass
21 our $CHUNKSIZE = 64 * 1024;
23 # XXX - this is only here for compat, do not use!
24 has env => ( is => 'rw', writer => '_set_env' );
25 my $WARN_ABOUT_ENV = 0;
27 my ($orig, $self, @args) = @_;
29 warn "env as a writer is deprecated, you probably need to upgrade Catalyst::Engine::PSGI"
30 unless $WARN_ABOUT_ENV++;
31 return $self->_set_env(@args);
38 Catalyst::Engine - The Catalyst Engine
49 =head2 $self->finalize_body($c)
51 Finalize body. Prints the response output.
56 my ( $self, $c ) = @_;
57 my $body = $c->response->body;
58 no warnings 'uninitialized';
59 if ( blessed($body) && $body->can('read') or ref($body) eq 'GLOB' ) {
62 $got = read $body, my ($buffer), $CHUNKSIZE;
63 $got = 0 unless $self->write( $c, $buffer );
69 $self->write( $c, $body );
72 my $res = $c->response;
79 =head2 $self->finalize_cookies($c)
81 Create CGI::Simple::Cookie objects from $c->res->cookies, and set them as
86 sub finalize_cookies {
87 my ( $self, $c ) = @_;
90 my $response = $c->response;
92 foreach my $name (keys %{ $response->cookies }) {
94 my $val = $response->cookies->{$name};
99 : CGI::Simple::Cookie->new(
101 -value => $val->{value},
102 -expires => $val->{expires},
103 -domain => $val->{domain},
104 -path => $val->{path},
105 -secure => $val->{secure} || 0,
106 -httponly => $val->{httponly} || 0,
109 if (!defined $cookie) {
110 $c->log->warn("undef passed in '$name' cookie value - not setting cookie")
115 push @cookies, $cookie->as_string;
118 for my $cookie (@cookies) {
119 $response->headers->push_header( 'Set-Cookie' => $cookie );
123 =head2 $self->finalize_error($c)
125 Output an appropriate error message. Called if there's an error in $c
126 after the dispatch has finished. Will output debug messages if Catalyst
127 is in debug mode, or a `please come back later` message otherwise.
131 sub _dump_error_page_element {
132 my ($self, $i, $element) = @_;
133 my ($name, $val) = @{ $element };
135 # This is fugly, but the metaclass is _HUGE_ and demands waaay too much
136 # scrolling. Suggestions for more pleasant ways to do this welcome.
137 local $val->{'__MOP__'} = "Stringified: "
138 . $val->{'__MOP__'} if ref $val eq 'HASH' && exists $val->{'__MOP__'};
140 my $text = encode_entities( dump( $val ));
141 sprintf <<"EOF", $name, $text;
142 <h2><a href="#" onclick="toggleDump('dump_$i'); return false">%s</a></h2>
144 <pre wrap="">%s</pre>
150 my ( $self, $c ) = @_;
152 $c->res->content_type('text/html; charset=utf-8');
153 my $name = ref($c)->config->{name} || join(' ', split('::', ref $c));
155 # Prevent Catalyst::Plugin::Unicode::Encoding from running.
156 # This is a little nasty, but it's the best way to be clean whether or
157 # not the user has an encoding plugin.
159 if ($c->can('encoding')) {
163 my ( $title, $error, $infos );
167 $error = join '', map {
168 '<p><code class="error">'
169 . encode_entities($_)
172 $error ||= 'No output';
173 $error = qq{<pre wrap="">$error</pre>};
174 $title = $name = "$name on Catalyst $Catalyst::VERSION";
175 $name = "<h1>$name</h1>";
177 # Don't show context in the dump
178 $c->req->_clear_context;
179 $c->res->_clear_context;
181 # Don't show body parser in the dump
182 $c->req->_clear_body;
186 for my $dump ( $c->dump_these ) {
187 push @infos, $self->_dump_error_page_element($i, $dump);
190 $infos = join "\n", @infos;
197 (en) Please come back later
198 (fr) SVP veuillez revenir plus tard
199 (de) Bitte versuchen sie es spaeter nocheinmal
200 (at) Konnten's bitt'schoen spaeter nochmal reinschauen
201 (no) Vennligst prov igjen senere
202 (dk) Venligst prov igen senere
203 (pl) Prosze sprobowac pozniej
204 (pt) Por favor volte mais tarde
205 (ru) Попробуйте еще раз позже
206 (ua) Спробуйте ще раз пізніше
211 $c->res->body( <<"" );
212 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
213 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
214 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
216 <meta http-equiv="Content-Language" content="en" />
217 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
218 <title>$title</title>
219 <script type="text/javascript">
221 function toggleDump (dumpElement) {
222 var e = document.getElementById( dumpElement );
223 if (e.style.display == "none") {
224 e.style.display = "";
227 e.style.display = "none";
232 <style type="text/css">
234 font-family: "Bitstream Vera Sans", "Trebuchet MS", Verdana,
235 Tahoma, Arial, helvetica, sans-serif;
237 background-color: #eee;
241 :link, :link:hover, :visited, :visited:hover {
246 background-color: #ccc;
247 border: 1px solid #aaa;
252 background-color: #cce;
253 border: 1px solid #755;
259 background-color: #eee;
260 border: 1px solid #575;
266 background-color: #cce;
267 border: 1px solid #557;
276 div.name h1, div.error p {
284 text-decoration: underline;
290 /* from http://users.tkk.fi/~tkarvine/linux/doc/pre-wrap/pre-wrap-css3-mozilla-opera-ie.html */
291 /* Browser specific (not valid) styles to make preformatted text wrap */
293 white-space: pre-wrap; /* css-3 */
294 white-space: -moz-pre-wrap; /* Mozilla, since 1999 */
295 white-space: -pre-wrap; /* Opera 4-6 */
296 white-space: -o-pre-wrap; /* Opera 7 */
297 word-wrap: break-word; /* Internet Explorer 5.5+ */
303 <div class="error">$error</div>
304 <div class="infos">$infos</div>
305 <div class="name">$name</div>
310 # Trick IE. Old versions of IE would display their own error page instead
311 # of ours if we'd give it less than 512 bytes.
312 $c->res->{body} .= ( ' ' x 512 );
314 $c->res->{body} = Encode::encode("UTF-8", $c->res->{body});
317 $c->res->status(500);
320 =head2 $self->finalize_headers($c)
322 Abstract method, allows engines to write headers to response
326 sub finalize_headers {
327 my ($self, $ctx) = @_;
329 # This is a less-than-pretty hack to avoid breaking the old
330 # Catalyst::Engine::PSGI. 5.9 Catalyst::Engine sets a response_cb and
331 # expects us to pass headers to it here, whereas Catalyst::Enngine::PSGI
332 # just pulls the headers out of $ctx->response in its run method and never
333 # sets response_cb. So take the lack of a response_cb as a sign that we
334 # don't need to set the headers.
336 return unless ($ctx->response->_has_response_cb);
339 $ctx->response->headers->scan(sub { push @headers, @_ });
341 my $writer = $ctx->response->_response_cb->([ $ctx->response->status, \@headers ]);
342 $ctx->response->_set_writer($writer);
343 $ctx->response->_clear_response_cb;
348 =head2 $self->finalize_uploads($c)
350 Clean up after uploads, deleting temp files.
354 sub finalize_uploads {
355 my ( $self, $c ) = @_;
357 # N.B. This code is theoretically entirely unneeded due to ->cleanup(1)
358 # on the HTTP::Body object.
359 my $request = $c->request;
360 foreach my $key (keys %{ $request->uploads }) {
361 my $upload = $request->uploads->{$key};
362 unlink grep { -e $_ } map { $_->tempname }
363 (ref $upload eq 'ARRAY' ? @{$upload} : ($upload));
368 =head2 $self->prepare_body($c)
370 sets up the L<Catalyst::Request> object body using L<HTTP::Body>
375 my ( $self, $c ) = @_;
377 $c->request->prepare_body;
380 =head2 $self->prepare_body_chunk($c)
382 Add a chunk to the request body.
386 # XXX - Can this be deleted?
387 sub prepare_body_chunk {
388 my ( $self, $c, $chunk ) = @_;
390 $c->request->prepare_body_chunk($chunk);
393 =head2 $self->prepare_body_parameters($c)
395 Sets up parameters from body.
399 sub prepare_body_parameters {
400 my ( $self, $c ) = @_;
402 $c->request->prepare_body_parameters;
405 =head2 $self->prepare_cookies($c)
407 Parse cookies from header. Sets a L<CGI::Simple::Cookie> object.
411 sub prepare_cookies {
412 my ( $self, $c ) = @_;
414 if ( my $header = $c->request->header('Cookie') ) {
415 $c->req->cookies( { CGI::Simple::Cookie->parse($header) } );
419 =head2 $self->prepare_headers($c)
423 sub prepare_headers {
424 my ($self, $ctx) = @_;
426 my $env = $ctx->request->env;
427 my $headers = $ctx->request->headers;
429 for my $header (keys %{ $env }) {
430 next unless $header =~ /^(HTTP|CONTENT|COOKIE)/i;
431 (my $field = $header) =~ s/^HTTPS?_//;
433 $headers->header($field => $env->{$header});
437 =head2 $self->prepare_parameters($c)
439 sets up parameters from query and post parameters.
443 sub prepare_parameters {
444 my ( $self, $c ) = @_;
446 $c->request->parameters;
449 =head2 $self->prepare_path($c)
451 abstract method, implemented by engines.
456 my ($self, $ctx) = @_;
458 my $env = $ctx->request->env;
460 my $scheme = $ctx->request->secure ? 'https' : 'http';
461 my $host = $env->{HTTP_HOST} || $env->{SERVER_NAME};
462 my $port = $env->{SERVER_PORT} || 80;
463 my $base_path = $env->{SCRIPT_NAME} || "/";
465 # set the request URI
467 if (!$ctx->config->{use_request_uri_for_path}) {
468 my $path_info = $env->{PATH_INFO};
469 if ( exists $env->{REDIRECT_URL} ) {
470 $base_path = $env->{REDIRECT_URL};
471 $base_path =~ s/\Q$path_info\E$//;
473 $path = $base_path . $path_info;
475 $path =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
476 $path =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
479 my $req_uri = $env->{REQUEST_URI};
480 $req_uri =~ s/\?.*$//;
485 # Using URI directly is way too slow, so we construct the URLs manually
486 my $uri_class = "URI::$scheme";
488 # HTTP_HOST will include the port even if it's 80/443
489 $host =~ s/:(?:80|443)$//;
491 if ($port !~ /^(?:80|443)$/ && $host !~ /:/) {
495 my $query = $env->{QUERY_STRING} ? '?' . $env->{QUERY_STRING} : '';
496 my $uri = $scheme . '://' . $host . '/' . $path . $query;
498 $ctx->request->uri( (bless \$uri, $uri_class)->canonical );
501 # base must end in a slash
502 $base_path .= '/' unless $base_path =~ m{/$};
504 my $base_uri = $scheme . '://' . $host . $base_path;
506 $ctx->request->base( bless \$base_uri, $uri_class );
511 =head2 $self->prepare_request($c)
513 =head2 $self->prepare_query_parameters($c)
515 process the query string and extract query parameters.
519 sub prepare_query_parameters {
522 my $env = $c->request->env;
523 my $query_string = exists $env->{QUERY_STRING}
524 ? $env->{QUERY_STRING}
527 # Check for keywords (no = signs)
528 # (yes, index() is faster than a regex :))
529 if ( index( $query_string, '=' ) < 0 ) {
530 $c->request->query_keywords( $self->unescape_uri($query_string) );
536 # replace semi-colons
537 $query_string =~ s/;/&/g;
539 my @params = grep { length $_ } split /&/, $query_string;
541 for my $item ( @params ) {
544 = map { $self->unescape_uri($_) }
545 split( /=/, $item, 2 );
547 $param = $self->unescape_uri($item) unless defined $param;
549 if ( exists $query{$param} ) {
550 if ( ref $query{$param} ) {
551 push @{ $query{$param} }, $value;
554 $query{$param} = [ $query{$param}, $value ];
558 $query{$param} = $value;
561 $c->request->query_parameters( \%query );
564 =head2 $self->prepare_read($c)
566 prepare to read from the engine.
571 my ( $self, $c ) = @_;
573 # Initialize the amount of data we think we need to read
574 $c->request->_read_length;
577 =head2 $self->prepare_request(@arguments)
579 Populate the context object from the request object.
583 sub prepare_request {
584 my ($self, $ctx, %args) = @_;
585 $ctx->request->_set_env($args{env});
586 $self->_set_env($args{env}); # Nasty back compat!
587 $ctx->response->_set_response_cb($args{response_cb});
590 =head2 $self->prepare_uploads($c)
594 sub prepare_uploads {
595 my ( $self, $c ) = @_;
597 my $request = $c->request;
598 return unless $request->_body;
600 my $uploads = $request->_body->upload;
601 my $parameters = $request->parameters;
602 foreach my $name (keys %$uploads) {
603 my $files = $uploads->{$name};
605 for my $upload (ref $files eq 'ARRAY' ? @$files : ($files)) {
606 my $headers = HTTP::Headers->new( %{ $upload->{headers} } );
607 my $u = Catalyst::Request::Upload->new
609 size => $upload->{size},
610 type => scalar $headers->content_type,
612 tempname => $upload->{tempname},
613 filename => $upload->{filename},
617 $request->uploads->{$name} = @uploads > 1 ? \@uploads : $uploads[0];
619 # support access to the filename as a normal param
620 my @filenames = map { $_->{filename} } @uploads;
621 # append, if there's already params with this name
622 if (exists $parameters->{$name}) {
623 if (ref $parameters->{$name} eq 'ARRAY') {
624 push @{ $parameters->{$name} }, @filenames;
627 $parameters->{$name} = [ $parameters->{$name}, @filenames ];
631 $parameters->{$name} = @filenames > 1 ? \@filenames : $filenames[0];
636 =head2 $self->read($c, [$maxlength])
638 Reads from the input stream by calling C<< $self->read_chunk >>.
640 Maintains the read_length and read_position counters as data is read.
645 my ( $self, $c, $maxlength ) = @_;
647 $c->request->read($maxlength);
650 =head2 $self->read_chunk($c, \$buffer, $length)
652 Each engine implements read_chunk as its preferred way of reading a chunk
653 of data. Returns the number of bytes read. A return of 0 indicates that
654 there is no more data to be read.
659 my ($self, $ctx) = (shift, shift);
660 return $ctx->request->read_chunk(@_);
663 =head2 $self->read_length
665 The length of input data to be read. This is obtained from the Content-Length
668 =head2 $self->read_position
670 The amount of input data that has already been read.
672 =head2 $self->run($app, $server)
674 Start the engine. Builds a PSGI application and calls the
675 run method on the server passed in, which then causes the
676 engine to loop, handling requests..
681 my ($self, $app, $psgi, @args) = @_;
682 # @args left here rather than just a $options, $server for back compat with the
683 # old style scripts which send a few args, then a hashref
685 # They should never actually be used in the normal case as the Plack engine is
686 # passed in got all the 'standard' args via the loader in the script already.
688 # FIXME - we should stash the options in an attribute so that custom args
689 # like Gitalist's --git_dir are possible to get from the app without stupid tricks.
690 my $server = pop @args if (scalar @args && blessed $args[-1]);
691 my $options = pop @args if (scalar @args && ref($args[-1]) eq 'HASH');
692 # Back compat hack for applications with old (non Catalyst::Script) scripts to work in FCGI.
693 if (scalar @args && !ref($args[0])) {
694 if (my $listen = shift @args) {
695 $options->{listen} ||= [$listen];
699 $server = Catalyst::EngineLoader->new(application_name => ref($self))->auto(%$options);
700 # We're not being called from a script, so auto detect what backend to
701 # run on. This should never happen, as mod_perl never calls ->run,
702 # instead the $app->handle method is called per request.
703 $app->log->warn("Not supplied a Plack engine, falling back to engine auto-loader (are your scripts ancient?)")
705 $app->run_options($options);
706 $server->run($psgi, $options);
709 =head2 build_psgi_app ($app, @args)
711 Builds and returns a PSGI application closure, wrapping it in the reverse proxy
712 middleware if the using_frontend_proxy config setting is set.
717 my ($self, $app, @args) = @_;
724 $app->handle_request(env => $env, response_cb => $respond);
729 =head2 $self->write($c, $buffer)
731 Writes the buffer to the client.
736 my ( $self, $c, $buffer ) = @_;
738 my $response = $c->response;
740 $buffer = q[] unless defined $buffer;
742 my $len = length($buffer);
743 $c->res->_writer->write($buffer);
748 =head2 $self->unescape_uri($uri)
750 Unescapes a given URI using the most efficient method available. Engines such
751 as Apache may implement this using Apache's C-based modules, for example.
756 my ( $self, $str ) = @_;
758 $str =~ s/(?:%([0-9A-Fa-f]{2})|\+)/defined $1 ? chr(hex($1)) : ' '/eg;
763 =head2 $self->finalize_output
765 <obsolete>, see finalize_body
769 Hash containing environment variables including many special variables inserted
770 by WWW server - like SERVER_*, REMOTE_*, HTTP_* ...
772 Before accessing environment variables consider whether the same information is
773 not directly available via Catalyst objects $c->request, $c->engine ...
775 BEWARE: If you really need to access some environment variable from your Catalyst
776 application you should use $c->engine->env->{VARNAME} instead of $ENV{VARNAME},
777 as in some environments the %ENV hash does not contain what you would expect.
781 Catalyst Contributors, see Catalyst.pm
785 This library is free software. You can redistribute it and/or modify it under
786 the same terms as Perl itself.