02-25-2008
Thanks for the response. How would I implement this in a file
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Hello:
Executing following script i'm getting error:
1=1+1: 0403-058 Assignment requires an lvalue.
It's not assuming the counter but i don't know why.
Some hint?
Thank you very much in advance.
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LEARN ABOUT DEBIAN
plack::middleware::httpexceptions
Plack::Middleware::HTTPExceptions(3pm) User Contributed Perl Documentation Plack::Middleware::HTTPExceptions(3pm)
NAME
Plack::Middleware::HTTPExceptions - Catch HTTP exceptions
SYNOPSIS
use HTTP::Exception;
my $app = sub {
# ...
HTTP::Exception::500->throw;
};
builder {
enable "HTTPExceptions", rethrow => 1;
$app;
};
DESCRIPTION
Plack::Middleware::HTTPExceptions is a PSGI middleware component to catch exceptions from applications that can be translated into HTTP
status codes.
Your application is supposed to throw an object that implements a "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. If the "code" method returns a code that is not an HTTP redirect
or error code (3xx, 4xx, or 5xx), the exception will be rethrown.
The exception object may also implement "as_string" or overload stringification to represent the text of the error. The text defaults to
the status message of the error code, such as Service Unavailable for 503.
Finally, the exception object may implement "as_psgi", and the result of this will be returned directly as the PSGI response.
If the code is in the 3xx range and the exception implements the 'location' method (HTTP::Exception::3xx does), the Location header will be
set in the response, so you can do redirects this way.
There are CPAN modules HTTP::Exception and HTTP::Throwable, and they are perfect to throw from your application to let this middleware
catch and display, but you can also implement your own exception class to throw.
If the thrown exception is not an object that implements either a "code" or an "as_psgi" method, a 500 error will be returned.
Alternatively, you can pass a true value for the "rethrow" parameter for this middleware, and the exception will instead be rethrown. This
is enabled by default when "PLACK_ENV" is set to "development", so that the StackTrace middleware can catch it instead.
AUTHOR
Tatsuhiko Miyagawa
SEE ALSO
paste.httpexceptions HTTP::Exception HTTP::Throwable
perl v5.14.2 2011-06-22 Plack::Middleware::HTTPExceptions(3pm)