HTTP::Proxy::BodyFilteUseriContributed Perl HTTP::Proxy::BodyFilter::simple(3)NAMEHTTP::Proxy::BodyFilter::simple - A class for creating simple filters
SYNOPSIS
use HTTP::Proxy::BodyFilter::simple;
# a simple s/// filter
my $filter = HTTP::Proxy::BodyFilter::simple->new(
sub { ${ $_[1] } =~ s/foo/bar/g; }
);
$proxy->push_filter( response => $filter );
DESCRIPTIONHTTP::Proxy::BodyFilter::simple can create BodyFilter without going
through the hassle of creating a full-fledged class. Simply pass a code
reference to the "filter()" method of your filter to the constructor,
and you'll get the adequate filter.
Constructor calling convention
The constructor can be called in several ways, which are shown in the
synopsis:
single code reference
The code reference must conform to the standard filter() signature:
sub filter {
my ( $self, $dataref, $message, $protocol, $buffer ) = @_;
...
}
It is assumed to be the code for the "filter()" method. See
HTTP::Proxy::BodyFilter.pm for more details about the "filter()"
method.
name/coderef pairs
The name is the name of the method ("filter", "begin", "end") and
the coderef is the method itself.
See HTTP::Proxy::BodyFilter for the methods signatures.
METHODS
This filter "factory" defines the standard HTTP::Proxy::BodyFilter
methods, but those are only, erm, "proxies" to the actual CODE
references passed to the constructor. These "proxy" methods are:
filter()begin()end()
Two other methods are actually HTTP::Proxy::BodyFilter::simple methods,
and are called automatically:
init()
Initalise the filter instance with the code references passed to
the constructor.
can()
Return the actual code reference that will be run, and not the
"proxy" methods. If called with any other name than "begin", "end"
and "filter", calls UNIVERSAL::can() instead.
There is also a method that returns a boolean value:
will_modify()
The "will_modify()" method returns a scalar value (boolean)
indicating if the filter may modify the body data. The default
method returns a true value, so you only need to set this value
when you are absolutely certain that the filter will not modify
data (or at least not modify its final length).
Here's a simple example:
$filter = HTTP::Proxy::BodyFilter::simple->new(
filter => sub { ${ $_[1] } =~ s/foo/bar/g; },
will_modify => 0, # "foo" is the same length as "bar"
);
SEE ALSO
HTTP::Proxy, HTTP::Proxy::BodyFilter.
AUTHOR
Philippe "BooK" Bruhat, <book@cpan.org>.
COPYRIGHT
Copyright 2003-2006, Philippe Bruhat.
LICENSE
This module is free software; you can redistribute it or modify it
under the same terms as Perl itself.
perl v5.14.12011-07-20HTTP::Proxy::BodyFilter::simple(3)
