Plack::Middleware::HTTPExceptions - Catch HTTP exceptions
use HTTP::Exception; my $app = sub { # ... HTTP::Exception::500->throw; }; builder { enable "HTTPExceptions"; $app; };
Plack::Middleware::HTTPExceptions is a PSGI middleware component to catch exceptions from applicaitions that can be translated into HTTP status code.
Your application is supposed to throw an object that implements code method which returns the HTTP status code such as 501 or 404. This middleware catches them and creates a valid response out of the code.
code
The exception object may also implement as_string, or overload the stringification, to represent the text of the error, which defaults to the status message of error codes, such as Service Unavailable for 503.
as_string
503
There's a CPAN module HTTP::Exception and they are pefect to throw from your application to let this middleware catch and display, but you can also implement your own exception class to throw.
All the other errors that can't be translated into HTTP errors are just rethrown to the outer frame.
Tatsuhiko Miyagawa
paste.httpexceptions HTTP::Exception
To install Plack, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Plack
CPAN shell
perl -MCPAN -e shell install Plack
For more information on module installation, please visit the detailed CPAN module installation guide.