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OpenID with Authlogic

#170 OpenID with Authlogic

Jul 13, 2009 | 11 minutes | Authentication, Plugins
Learn how to apply OpenID to an existing Authlogic setup as I show in this episode. This builds upon the app from episode 160.
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bash 
sudo gem install ruby-openid authlogic-oid
script/plugin install git://github.com/rails/open_id_authentication.git
rake open_id_authentication:db:create
script/generate migration add_openid_identifier_to_users openid_identifier:string
rake db:migrate
config/environment.rb 
config.gem "authlogic-oid", :lib => "authlogic_openid"
config.gem "ruby-openid", :lib => "openid"
models/user.rb 
acts_as_authentic do |c|
  c.openid_required_fields = [:nickname, :email]
end

private

def map_openid_registration(registration)
  self.email = registration["email"] if email.blank?
  self.username = registration["nickname"] if username.blank?
end
user_sessions_controller.rb 
def create
  @user_session = UserSession.new(params[:user_session])
  @user_session.save do |result|
    if result
      flash[:notice] = "Successfully logged in."
      redirect_to root_url
    else
      render :action => 'new'
    end
  end
end
users_controller.rb 
def create
  @user = User.new(params[:user])
  @user.save do |result|
    if result
      flash[:notice] = "Registration successful."
      redirect_to root_url
    else
      render :action => 'new'
    end
  end
end

def update
  @user = current_user
  @user.attributes = params[:user]
  @user.save do |result|
    if result
      flash[:notice] = "Successfully updated profile."
      redirect_to root_url
    else
      render :action => 'edit'
    end
  end
end
users/_form.html.erb 
<% if @user.openid_identifier.blank? %>
  <p>
    <%= f.label :password %><br />
    <%= f.password_field :password %>
  </p>
  <p>
    <%= f.label :password_confirmation %><br />
    <%= f.password_field :password_confirmation %>
  </p>
  <p><%= f.submit "Submit" %></p>

  <h2>Or use OpenID</h2>
<% end %>
<p>
  <%= f.label :openid_identifier, "OpenID URL" %><br />
  <%= f.text_field :openid_identifier %>
</p>
<p><%= f.submit "Submit" %></p>
user_sessions/new.html.erb 
<h2>Or use OpenID</h2>
<p>
  <%= f.label :openid_identifier, "OpenID URL" %><br />
  <%= f.text_field :openid_identifier %>
</p>
<p><%= f.submit "Submit" %></p>
css 
/* embeds the openid image in the text field */
input#user_openid_identifier, input#user_session_openid_identifier {
  background: url(http://openid.net/images/login-bg.gif) no-repeat;
  background-color: #fff;
  background-position: 0 50%;
  color: #000;
  padding-left: 18px;
}