Public: A simple middleware that adds an access token to each request.

By default, the token is added as both "access_token" query parameter and the "Authorization" HTTP request header. It can alternatively be added exclusively as a bearer token "Authorization" header by specifying a "token_type" option of "bearer". However, an explicit "access_token" parameter or "Authorization" header for the current request are not overriden.

Examples

  # configure default token:
  OAuth2.new(app, 'abc123')

  # configure query parameter name:
  OAuth2.new(app, 'abc123', :param_name => 'my_oauth_token')

  # use bearer token authorization header only
  OAuth2.new(app, 'abc123', :token_type => 'bearer')

  # default token value is optional:
  OAuth2.new(app, :param_name => 'my_oauth_token')