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HTTP-AnyUA-0.904
River stage one • 4 direct dependents • 6 total dependents
2 ++
/ HTTP::AnyUA::Backend

NAME

HTTP::AnyUA::Backend - A base class for HTTP::AnyUA backends

VERSION

version 0.904

SYNOPSIS

    package HTTP::AnyUA::Backend::MyUserAgent;

    use parent 'HTTP::AnyUA::Backend';

    sub response_is_future { 0 }

    sub request {
        my ($self, $method, $url, $args) = @_;

        my $ua = $self->ua;

        # Here is where you transform the arguments into a request that $ua
        # understands, make the request against $ua and get a response, and
        # transform the response to the expected hashref form.

        my $resp = $ua->make_request();

        return $resp;
    }

    ### Non-blocking user agents are expected to return Future objects:

    use Future;

    sub response_is_future { 1 }

    sub request {
        my ($self, $method, $url, $args) = @_;

        my $ua = $self->ua;

        my $future = Future->new;

        # Again, this example glosses over transforming the request and response
        # to and from the actual user agent, but such details are the whole
        # point of a backend.

        $ua->nonblocking_callback(sub {
            my $resp = shift;

            if ($resp->{success}) {
                $future->done($resp);
            }
            else {
                $future->fail($resp);
            }
        });

        return $future;
    }

DESCRIPTION

This module provides an interface for an HTTP::AnyUA "backend," which is an adapter that adds support for using a type of user agent with HTTP::AnyUA.

This class should not be instantiated directly, but it may be convenient for backend implementations to subclass it.

At its core, a backend simply takes a set of standard arguments that represent an HTTP request, transforms that request into a form understood by an underlying user agent, calls upon the user agent to make the request and get a response, and then transforms that response into a standard form. The standard forms for the request and response are based on HTTP::Tiny's arguments and return value to and from its request method.

ATTRIBUTES

ua

Get the user agent that was passed to "new".

response_is_future

Get whether or not responses are Future objects. Default is false.

This may be overridden by implementations.

METHODS

new

    $backend = HTTP::AnyUA::Backend::MyUserAgent->new($my_user_agent);

Construct a new backend.

request

    $response = $backend->request($method => $url, \%options);

Make a request, get a response.

This must be overridden by implementations.

SEE ALSO

BUGS

Please report any bugs or feature requests on the bugtracker website https://github.com/chazmcgarvey/HTTP-AnyUA/issues

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

Charles McGarvey <chazmcgarvey@brokenzipper.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2019 by Charles McGarvey.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.