for qw/components arguments dispatcher engine log dispatcher_class
engine_loader context_class request_class response_class stats_class
setup_finished _psgi_app loading_psgi_file run_options _psgi_middleware
- _data_handlers _encoding _encode_check/;
+ _data_handlers _encoding _encode_check finalized_default_middleware/;
__PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
__PACKAGE__->request_class('Catalyst::Request');
__PACKAGE__->_encode_check(Encode::FB_CROAK | Encode::LEAVE_SRC);
# Remember to update this in Catalyst::Runtime as well!
-our $VERSION = '5.90079_005';
+our $VERSION = '5.90082';
$VERSION = eval $VERSION if $VERSION =~ /_/; # numify for warning-free dev releases
sub import {
=head2 shift_errors
shifts the most recently added error off the error stack and returns if. Returns
-nothing if there are nomore errors.
+nothing if there are no more errors.
=cut
=head2 encoding
-Sets or gets the application encoding.
+Sets or gets the application encoding. Setting encoding takes either an
+Encoding object or a string that we try to resolve via L<Encode::find_encoding>.
+
+You would expect to get the encoding object back if you attempt to set it. If
+there is a failure you will get undef returned and an error message in the log.
=cut
if(blessed $c) {
$c->encoding(undef);
} else {
- $c->debug->error("You can't clear encoding on the application");
+ $c->log->error("You can't clear encoding on the application");
}
}
my $encoding;
if ( scalar @_ ) {
+
+ # Don't let one change this once we are too far into the response
+ if(blessed $c && $c->res->finalized_headers) {
+ Carp::croak("You may not change the encoding once the headers are finalized");
+ return;
+ }
+
# Let it be set to undef
if (my $wanted = shift) {
$encoding = Encode::find_encoding($wanted)
B<Note:> You B<should not> wrap this method with method modifiers
or bad things will happen - wrap the C<setup_finalize> method instead.
+B<Note:> You can create a custom setup stage that will execute when the
+application is starting. Use this to customize setup.
+
+ MyApp->setup(-Custom=value);
+
+ sub setup_custom {
+ my ($class, $value) = @_;
+ }
+
+Can be handy if you want to hook into the setup phase.
+
=cut
sub setup {
=head2 $c->finalize_encoding
Make sure your body is encoded properly IF you set an encoding. By
-default the encoding is UTF-8 but you can disable it by explictly setting the
+default the encoding is UTF-8 but you can disable it by explicitly setting the
encoding configuration value to undef.
We can only encode when the body is a scalar. Methods for encoding via the
Adds the following L<Plack> middlewares to your application, since they are
useful and commonly needed:
-L<Plack::Middleware::ReverseProxy>, (conditionally added based on the status
-of your $ENV{REMOTE_ADDR}, and can be forced on with C<using_frontend_proxy>
-or forced off with C<ignore_frontend_proxy>), L<Plack::Middleware::LighttpdScriptNameFix>
-(if you are using Lighttpd), L<Plack::Middleware::IIS6ScriptNameFix> (always
-applied since this middleware is smart enough to conditionally apply itself).
+L<Plack::Middleware::LighttpdScriptNameFix> (if you are using Lighttpd),
+L<Plack::Middleware::IIS6ScriptNameFix> (always applied since this middleware
+is smart enough to conditionally apply itself).
+
+We will also automatically add L<Plack::Middleware::ReverseProxy> if we notice
+that your HTTP $env variable C<REMOTE_ADDR> is '127.0.0.1'. This is usually
+an indication that your server is running behind a proxy frontend. However in
+2014 this is often not the case. We preserve this code for backwards compatibility
+however I B<highly> recommend that if you are running the server behind a front
+end proxy that you clearly indicate so with the C<using_frontend_proxy> configuration
+setting to true for your environment configurations that run behind a proxy. This
+way if you change your front end proxy address someday your code would inexplicably
+stop working as expected.
Additionally if we detect we are using Nginx, we add a bit of custom middleware
to solve some problems with the way that server handles $ENV{PATH_INFO} and
-$ENV{SCRIPT_NAME}
+$ENV{SCRIPT_NAME}.
+
+Please B<NOTE> that if you do use C<using_frontend_proxy> the middleware is now
+adding via C<registered_middleware> rather than this method.
+
+If you are using Lighttpd or IIS6 you may wish to apply these middlewares. In
+general this is no longer a common case but we have this here for backward
+compatibility.
=cut
sub apply_default_middlewares {
my ($app, $psgi_app) = @_;
- $psgi_app = Plack::Middleware::Conditional->wrap(
- $psgi_app,
- builder => sub { Plack::Middleware::ReverseProxy->wrap($_[0]) },
- condition => sub {
- my ($env) = @_;
- return if $app->config->{ignore_frontend_proxy};
- return $env->{REMOTE_ADDR} eq '127.0.0.1'
- || $app->config->{using_frontend_proxy};
- },
- );
+ # Don't add this conditional IF we are explicitly saying we want the
+ # frontend proxy support. We don't need it here since if that is the
+ # case it will be always loaded in the default_middleware.
+
+ unless($app->config->{using_frontend_proxy}) {
+ $psgi_app = Plack::Middleware::Conditional->wrap(
+ $psgi_app,
+ builder => sub { Plack::Middleware::ReverseProxy->wrap($_[0]) },
+ condition => sub {
+ my ($env) = @_;
+ return if $app->config->{ignore_frontend_proxy};
+ return $env->{REMOTE_ADDR} eq '127.0.0.1';
+ },
+ );
+ }
# If we're running under Lighttpd, swap PATH_INFO and SCRIPT_NAME
# http://lists.scsys.co.uk/pipermail/catalyst/2006-June/008361.html
=head2 App->to_app
Returns a PSGI application code reference for the catalyst application
-C<$c>. This is the bare application without any middlewares
-applied. C<${myapp}.psgi> is not taken into account.
+C<$c>. This is the bare application created without the C<apply_default_middlewares>
+method called. We do however apply C<registered_middleware> since those are
+integral to how L<Catalyst> functions. Also, unlike starting your application
+with a generated server script (via L<Catalyst::Devel> and C<catalyst.pl>) we do
+not attempt to return a valid L<PSGI> application using any existing C<${myapp}.psgi>
+scripts in your $HOME directory.
+
+B<NOTE> C<apply_default_middlewares> was originally created when the first PSGI
+port was done for v5.90000. These are middlewares that are added to achieve
+backward compatibility with older applications. If you start your application
+using one of the supplied server scripts (generated with L<Catalyst::Devel> and
+the project skeleton script C<catalyst.pl>) we apply C<apply_default_middlewares>
+automatically. This was done so that pre and post PSGI port applications would
+work the same way.
This is what you want to be using to retrieve the PSGI application code
-reference of your Catalyst application for use in F<.psgi> files.
+reference of your Catalyst application for use in a custom F<.psgi> or in your
+own created server modules.
=cut
}
}
+=head2 default_middleware
+
+Returns a list of instantiated PSGI middleware objects which is the default
+middleware that is active for this application (taking any configuration
+options into account, excluding your custom added middleware via the C<psgi_middleware>
+configuration option). You can override this method if you wish to change
+the default middleware (although do so at risk since some middleware is vital
+to application function.)
+
+The current default middleware list is:
+
+ Catalyst::Middleware::Stash
+ Plack::Middleware::HTTPExceptions
+ Plack::Middleware::RemoveRedundantBody
+ Plack::Middleware::FixMissingBodyInRedirect
+ Plack::Middleware::ContentLength
+ Plack::Middleware::MethodOverride
+ Plack::Middleware::Head
+
+If the configuration setting C<using_frontend_proxy> is true we add:
+
+ Plack::Middleware::ReverseProxy
+
+If the configuration setting C<using_frontend_proxy_path> is true we add:
+
+ Plack::Middleware::ReverseProxyPath
+
+But B<NOTE> that L<Plack::Middleware::ReverseProxyPath> is not a dependency of the
+L<Catalyst> distribution so if you want to use this option you should add it to
+your project distribution file.
+
+These middlewares will be added at L</setup_middleware> during the
+L</setup> phase of application startup.
+
+=cut
+
+sub default_middleware {
+ my $class = shift;
+ my @mw = (
+ Catalyst::Middleware::Stash->new,
+ Plack::Middleware::HTTPExceptions->new,
+ Plack::Middleware::RemoveRedundantBody->new,
+ Plack::Middleware::FixMissingBodyInRedirect->new,
+ Plack::Middleware::ContentLength->new,
+ Plack::Middleware::MethodOverride->new,
+ Plack::Middleware::Head->new);
+
+ if($class->config->{using_frontend_proxy}) {
+ push @mw, Plack::Middleware::ReverseProxy->new;
+ }
+
+ if($class->config->{using_frontend_proxy_path}) {
+ if(Class::Load::try_load_class('Plack::Middleware::ReverseProxyPath')) {
+ push @mw, Plack::Middleware::ReverseProxyPath->new;
+ } else {
+ $class->log->error("Cannot use configuration 'using_frontend_proxy_path' because 'Plack::Middleware::ReverseProxyPath' is not installed");
+ }
+ }
+
+ return @mw;
+}
+
=head2 registered_middlewares
Read only accessor that returns an array of all the middleware in the order
sub registered_middlewares {
my $class = shift;
if(my $middleware = $class->_psgi_middleware) {
- return (
- Catalyst::Middleware::Stash->new,
- Plack::Middleware::HTTPExceptions->new,
- Plack::Middleware::RemoveRedundantBody->new,
- Plack::Middleware::FixMissingBodyInRedirect->new,
- Plack::Middleware::ContentLength->new,
- Plack::Middleware::MethodOverride->new,
- Plack::Middleware::Head->new,
- @$middleware);
+ my @mw = ($class->default_middleware, @$middleware);
+
+ if($class->config->{using_frontend_proxy}) {
+ push @mw, Plack::Middleware::ReverseProxy->new;
+ }
+
+ return @mw;
} else {
die "You cannot call ->registered_middlewares until middleware has been setup";
}
sub setup_middleware {
my $class = shift;
- my @middleware_definitions = @_ ?
- reverse(@_) : reverse(@{$class->config->{'psgi_middleware'}||[]});
+ my @middleware_definitions;
+
+ # If someone calls this method you can add middleware with args. However if its
+ # called without an arg we need to setup the configuration middleware.
+ if(@_) {
+ @middleware_definitions = reverse(@_);
+ } else {
+ @middleware_definitions = reverse(@{$class->config->{'psgi_middleware'}||[]})
+ unless $class->finalized_default_middleware;
+ $class->finalized_default_middleware(1); # Only do this once, just in case some people call setup over and over...
+ }
my @middleware = ();
while(my $next = shift(@middleware_definitions)) {
return eval {
local $/;
$slurped = $fh->getline;
- $parser->can("decode_json")->($slurped);
+ $parser->can("decode_json")->($slurped); # decode_json does utf8 decoding for us
} || Catalyst::Exception->throw(sprintf "Error Parsing POST '%s', Error: %s", (defined($slurped) ? $slurped : 'undef') ,$@);
},
};
=item *
+C<using_frontend_proxy_path> - Enabled L<Plack::Middleware::ReverseProxyPath> on your application (if
+installed, otherwise log an error). This is useful if your application is not running on the
+'root' (or /) of your host server. B<NOTE> if you use this feature you should add the required
+middleware to your project dependency list since its not automatically a dependency of L<Catalyst>.
+This has been done since not all people need this feature and we wish to restrict the growth of
+L<Catalyst> dependencies.
+
+=item *
+
C<encoding> - See L</ENCODING>
This now defaults to 'UTF-8'. You my turn it off by setting this configuration
=head1 ENCODING
-On request, decodes all params from encoding into a sequence of
-logical characters. On response, encodes body into encoding.
+Starting in L<Catalyst> version 5.90080 encoding is automatically enabled
+and set to encode all body responses to UTF8 when possible and applicable.
+Following is documentation on this process. If you are using an older
+version of L<Catalyst> you should review documentation for that version since
+a lot has changed.
By default encoding is now 'UTF-8'. You may turn it off by setting
the encoding configuration to undef.
+ MyApp->config(encoding => undef);
+
+This is recommended for temporary backwards compatibility only.
+
Encoding is automatically applied when the content-type is set to
a type that can be encoded. Currently we encode when the content type
matches the following regular expression:
$content_type =~ /^text|xml$|javascript$/
-Encoding is set on the application, but it is copied to the response object
-so you can override encoding rules per request (See L<Catalyst::Response>
-for more information).
+Encoding is set on the application, but it is copied to the context object
+so that you can override it on a request basis.
Be default we don't automatically encode 'application/json' since the most
-popular JSON encoders (such as L<JSON::MaybeXS> which is the library that
-L<Catalyst> can make use of) will do the UTF8 encoding and decoding automatically.
-Having it on in Catalyst could result in double encoding.
+common approaches to generating this type of response (Either via L<Catalyst::View::JSON>
+or L<Catalyst::Action::REST>) will do so already and we want to avoid double
+encoding issues.
If you are producing JSON response in an unconventional manner (such
as via a template or manual strings) you should perform the UTF8 encoding
NOTE: We also examine the value of $c->response->content_encoding. If
you set this (like for example 'gzip', and manually gzipping the body)
-we assume that you have done all the neccessary encoding yourself, since
+we assume that you have done all the necessary encoding yourself, since
we cannot encode the gzipped contents. If you use a plugin like
-L<Catalyst::Plugin::Compress> we will be updating that plugin to work
-with the new UTF8 encoding code, or you can use L<Plack::Middleware::Deflater>
-or (probably best) do your compression on a front end proxy.
+L<Catalyst::Plugin::Compress> you need to update to a modern version in order
+to have this function correctly with the new UTF8 encoding code, or you
+can use L<Plack::Middleware::Deflater> or (probably best) do your compression on
+a front end proxy.
=head2 Methods
Upasana <me@upasana.me>
+John Napiorkowski (jnap) <jjnapiork@cpan.org>
+
=head1 COPYRIGHT
-Copyright (c) 2005-2014, the above named PROJECT FOUNDER and CONTRIBUTORS.
+Copyright (c) 2005-2015, the above named PROJECT FOUNDER and CONTRIBUTORS.
=head1 LICENSE
projects / catagits/Catalyst-Runtime.git / blobdiff