SelectSaver(3pm) Perl Programmers Reference Guide SelectSaver(3pm)NAME
SelectSaver - save and restore selected file handle
SYNOPSIS
use SelectSaver;
{
my $saver = new SelectSaver(FILEHANDLE);
# FILEHANDLE is selected
}
# previous handle is selected
{
my $saver = new SelectSaver;
# new handle may be selected, or not
}
# previous handle is selected
DESCRIPTION
A "SelectSaver" object contains a reference to the file handle that was selected when it was created. If its "new" method gets an extra
parameter, then that parameter is selected; otherwise, the selected file handle remains unchanged.
When a "SelectSaver" is destroyed, it re-selects the file handle that was selected when it was created.
perl v5.8.0 2002-06-01 SelectSaver(3pm)
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HTTP::Proxy::FilterStack(3pm) User Contributed Perl Documentation HTTP::Proxy::FilterStack(3pm)NAME
HTTP::Proxy::FilterStack - A class to manage filter stacks
DESCRIPTION
This class is used internally by "HTTP::Proxy" to manage its four filter stacks.
From the point of view of "HTTP::Proxy::FilterStack", a filter is actually a ("matchsub", "filterobj") pair. The match subroutine
(generated by "HTTP::Proxy"'s "push_filter()" method) is run against the current "HTTP::Message" object to find out which filters must be
kept in the stack when handling this message.
The filter stack maintains a set of buffers where the filters can store data. This data is appended at the beginning of the next chunk of
data, until all the data has been sent.
METHODS
The class provides the following methods:
new( $isbody )
Create a new instance of "HTTP::Proxy::FilterStack". If $isbody is true, then the stack will manage body filters (subclasses of
"HTTP::Proxy::BodyFilter").
select_filters( $message )
$message is the current "HTTP::Message" handled by the proxy. It is used (with the help of each filter's match subroutine)
filter( @args )
This method calls all the currently selected filters in turn, with the appropriate arguments.
filter_last()
This method calls all the currently selected filters in turn, to filter the data remaining in the buffers in a single pass.
will_modify()
Return a boolean value indicating if the list of selected filters in the stack will modify the body content. The value is computed from
the result of calling "will_modify()" on all selected filters.
all()
Return a list of all filters in the stack.
eod()
Used for END OF DATA bookkeeping.
push()
Push the given "[ match, filterobj ]" pairs at the top of the stack.
insert( $idx, @pairs )
Insert the given "[ match, filterobj ]" pairs at position $idx in the stack.
remove( $idx )
Remove the "[ match, filterobj ]" pair at position $idx in the stack.
AUTHOR
Philippe "BooK" Bruhat, <book@cpan.org>.
COPYRIGHT
Copyright 2002-2006, Philippe Bruhat.
LICENSE
This module is free software; you can redistribute it or modify it under the same terms as Perl itself.
perl v5.12.4 2011-07-03 HTTP::Proxy::FilterStack(3pm)