NAME

   WWW::OAuth - Portable OAuth 1.0 authentication

SYNOPSIS

    use WWW::OAuth;

    my $oauth = WWW::OAuth->new(
      client_id => $client_id,
      client_secret => $client_secret,
      token => $token,
      token_secret => $token_secret,
    );

    # HTTP::Tiny
    use HTTP::Tiny;
    my $res = $oauth->authenticate(Basic => { method => 'GET', url => $url })
      ->request_with(HTTP::Tiny->new);

    # HTTP::Request
    use HTTP::Request::Common;
    use LWP::UserAgent;
    my $res = $oauth->authenticate(GET $url)->request_with(LWP::UserAgent->new);

    # Mojo::Message::Request
    use Mojo::UserAgent;
    my $tx = $ua->build_tx(get => $url);
    $tx = $oauth->authenticate($tx->req)->request_with(Mojo::UserAgent->new);


DESCRIPTION

   WWW::OAuth implements OAuth 1.0 request authentication according to RFC
   5849 <http://tools.ietf.org/html/rfc5849>. It does not implement the
   user agent requests needed for the complete OAuth 1.0 authorization
   flow; it only prepares and signs requests, leaving the rest up to your
   application. It can authenticate requests for LWP::UserAgent,
   Mojo::UserAgent, HTTP::Tiny, and can be extended to operate on other
   types of requests.

   Some user agents can be configured to automatically authenticate each
   request with a WWW::OAuth object.

    # LWP::UserAgent
    my $ua = LWP::UserAgent->new;
    $ua->add_handler(request_prepare => sub { $oauth->authenticate($_[0]) });

    # Mojo::UserAgent
    my $ua = Mojo::UserAgent->new;
    $ua->on(start => sub { $oauth->authenticate($_[1]->req) });

RETRIEVING ACCESS TOKENS

   The process of retrieving access tokens and token secrets for
   authorization on behalf of a user may differ among various APIs, but it
   follows this general format (error checking is left as an exercise to
   the reader):

    use WWW::OAuth;
    use WWW::OAuth::Util 'form_urldecode';
    use HTTP::Tiny;
    my $ua = HTTP::Tiny->new;
    my $oauth = WWW::OAuth->new(
      client_id => $client_id,
      client_secret => $client_secret,
    );

    # Request token request
    my $res = $oauth->authenticate({ method => 'POST', url => $request_token_url },
      { oauth_callback => $callback_url })->request_with($ua);
    my %res_data = @{form_urldecode $res->{content}};
    my ($request_token, $request_secret) = @res_data{'oauth_token','oauth_token_secret'};


   Now, the returned request token must be used to construct a URL for the
   user to go to and authorize your application. The exact method differs
   by API. The user will usually be redirected to the $callback_url passed
   earlier after authorizing, with a verifier token that can be used to
   retrieve the access token and secret.

    # Access token request
    $oauth->token($request_token);
    $oauth->token_secret($request_secret);
    my $res = $oauth->authenticate({ method => 'POST', url => $access_token_url },
      { oauth_verifier => $verifier_token })->request_with($ua);
    my %res_data = @{form_urldecode $res->{content}};
    my ($access_token, $access_secret) = @res_data{'oauth_token','oauth_token_secret'};


   Finally, the access token and secret can now be stored and used to
   authorize your application on behalf of this user.

    $oauth->token($access_token);
    $oauth->token_secret($access_secret);

ATTRIBUTES

   WWW::OAuth implements the following attributes.

client_id

    my $client_id = $oauth->client_id;
    $oauth        = $oauth->client_id($client_id);

   Client ID used to identify application (sometimes called an API key or
   consumer key). Required for all requests.

client_secret

    my $client_secret = $oauth->client_secret;
    $oauth            = $oauth->client_secret($client_secret);

   Client secret used to authenticate application (sometimes called an API
   secret or consumer secret). Required for all requests.

token

    my $token = $oauth->token;
    $oauth    = $oauth->token($token);

   Request or access token used to identify resource owner. Leave
   undefined for temporary credentials requests (request token requests).

token_secret

    my $token_secret = $oauth->token_secret;
    $oauth           = $oauth->token_secret($token_secret);

   Request or access token secret used to authenticate on behalf of
   resource owner. Leave undefined for temporary credentials requests
   (request token requests).

signature_method

    my $method = $oauth->signature_method;
    $oauth     = $oauth->signature_method($method);

   Signature method, can be PLAINTEXT, HMAC-SHA1, a coderef that
   implements the RSA-SHA1 method, or an object that implements the
   RSA-SHA1 method with a sign method like Crypt::OpenSSL::RSA. Defaults
   to HMAC-SHA1.

METHODS

   WWW::OAuth implements the following methods.

authenticate

    $container = $oauth->authenticate($container, \%oauth_params);
    my $container = $oauth->authenticate($http_request, \%oauth_params);
    my $container = $oauth->authenticate(Basic => { method => 'GET', url => $url }, \%oauth_params);

   Wraps the HTTP request in a container with "oauth_request" in
   WWW::OAuth::Util, then updates the request URL, content, and headers as
   needed to construct and sign the request for OAuth 1.0. OAuth
   parameters (starting with oauth_) may be optionally specified in a
   hashref, and will override any generated or existing OAuth parameters
   of the same name. Returns the container object.

HTTP REQUEST CONTAINERS

   Request containers provide a unified interface for "authenticate" to
   parse and update HTTP requests. They must perform the Role::Tiny role
   WWW::OAuth::Request. Custom container classes can be instantiated
   directly or via "oauth_request" in WWW::OAuth::Util.

Basic

   WWW::OAuth::Request::Basic contains the request attributes directly,
   for user agents such as HTTP::Tiny that do not use request objects.

HTTP_Request

   WWW::OAuth::Request::HTTP_Request wraps a HTTP::Request object, which
   is compatible with several user agents including LWP::UserAgent,
   HTTP::Thin, and Net::Async::HTTP.

Mojo

   WWW::OAuth::Request::Mojo wraps a Mojo::Message::Request object, which
   is used by Mojo::UserAgent via Mojo::Transaction.

BUGS

   Report any issues on the public bugtracker.

AUTHOR

   Dan Book <[email protected]>

COPYRIGHT AND LICENSE

   This software is Copyright (c) 2015 by Dan Book.

   This is free software, licensed under:

     The Artistic License 2.0 (GPL Compatible)

SEE ALSO

   Net::OAuth, Mojolicious::Plugin::OAuth2

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