Request

POST /user_sessions HTTP/1.1
Content-Type: application/json

{"username":"admin","password":"test","remember":true}

Response

HTTP/1.1 200 OK 
Etag: "7666ae547899c0ffa16acfd66371c76e"
Connection: close
Content-Type: text/html; charset=utf-8
Date: Fri, 06 Aug 2010 21:21:22 GMT
Server: WEBrick/1.3.1 (Ruby/1.8.7/2010-04-19)
X-Runtime: 0.171651
Content-Length: 3245
Cache-Control: max-age=0, private, must-revalidate

UserSessionsController.rb

class UserSessionsController < ApplicationController
  filter_resource_access
  layout "login"
  ssl_required :new, :create if Settings.ssl
  respond_to :html, :xml, :json
  
  def new
    respond_with @user_session = UserSession.new
  end
  
  def create
    @user_session = UserSession.new params[:user_session]
    if @user_session.save
      flash[:notice] = "Successfully logged in."
    end
    respond_with @user_session#, :location => root_url
  end
  
  def destroy
    @user_session = UserSession.find
    @user_session.destroy
    flash[:notice] = "Sucessfully logged out."
    redirect_to root_url
  end
end