# Net::OpenID::IndirectMessage - phpMan

## NAME
    [Net::OpenID::IndirectMessage] - Class representing a collection of
    namespaced arguments

## VERSION
    version 1.20

## DESCRIPTION
    This class acts as an abstraction layer over a collection of flat URL
    arguments which supports namespaces as defined by the OpenID Auth 2.0
    specification.

    It also recognises when it is given OpenID 1.1 non-namespaced arguments
    and acts as if the relevant namespaces were present. In this case, it
    only supports the basic OpenID 1.1 arguments and the extension arguments
    for Simple Registration.

    This class can operate on a normal hashref, a CGI object or any object
    with a "param" method that behaves similarly ([Apache::Request],
    [Apache2::Request], [Mojo::Parameters],...), an Apache object, a
    [Plack::Request] object, or an arbitrary "CODE" ref that when given a key
    name as its first parameter and returns a value and if given no
    arguments returns a list of all keys present.

    If you pass in a hashref or a coderef it is your responsibility as the
    caller to check the HTTP request method and pass in the correct set of
    arguments. For the other kinds of objects, this module will do the right
    thing automatically.

## SYNOPSIS
        use [Net::OpenID::IndirectMessage];

        # Pass in something suitable for the underlying flat dictionary.
        # Will return an instance if the request arguments can be understood
        # as a supported OpenID Message format.
        # Will return undef if this doesn't seem to be an OpenID Auth message.
        # Will croak if the $argumenty_thing is not of a suitable type.
        my $args = [Net::OpenID::IndirectMessage]->new($argumenty_thing);

        # Determine which protocol version the message is using.
        # Currently this can be either 1 for 1.1 or 2 for 2.0.
        # Expect larger numbers for other versions in future.
        # Most callers don't really need to care about this.
        my $version = $args->protocol_version();

        # Get a core argument value ("openid.mode")
        my $mode = $args->get("mode");

        # Get an extension argument value
        my $nickname = $args->get_ext("<http://openid.net/extensions/sreg/1.1>", "nickname");

        # Get hashref of all arguments in a given namespace
        my $sreg = $args->get_ext("<http://openid.net/extensions/sreg/1.1>");

    Most of the time callers won't need to use this class directly, but will
    instead access it through a [Net::OpenID::Consumer] instance.

## METHODS
    protocol_version
        Currently returns 1 or 2, according as this is an OpenID 1.0/1.1 or
        an OpenID 2.0 message.

    has_ext
        Takes an extension namespace and returns true if the named extension
        is used in this message.

    get_ext
        Takes an extension namespace and an optional parameter name, returns
        the parameter value, or if no parameter given, the parameter value.