Sinatra::Session
================

Sinatra::Session is a small extension for Sinatra apps that provides several
convenient settings and methods when working with cookie-based sessions.

Settings
--------

  session_fail   -> A URL in your app that the client will be redirected to
                    when `session!` is called and the session is not valid.
                    Defaults to '/login'
  session_name   -> The name to use for the session cookie
  session_path   -> The session cookie path
  session_domain -> The session cookie domain
  session_expire -> The number of seconds from now the cookie will be valid
  session_secret -> A secret key that is used to check the integrity of
                    session data

Helper Methods
--------------

  session_start!             -> Starts the session
  session_end!(destroy=true) -> Ends the session. If `destroy` is false then
                                session data will be preserved, even though
                                future calls to `session?` will return false
  session?                   -> Returns true if the session is valid
  session!                   -> Redirects the client to the URL specified in
                                the `session_fail` option unless the session is
                                valid

Installation
------------

Via RubyGems:

    $ sudo gem install sinatra-session

From a local copy:

    $ git clone git://github.com/mjijackson/sinatra-session.git
    $ cd sinatra-session
    $ rake package && sudo rake install

Usage
-----

As with all Sinatra extensions, Sinatra::Session may be used in both classic
and modular-style apps. First, classic.

    require 'sinatra'
    require 'sinatra/session'

    set :session_fail, '/login'
    set :session_secret, 'So0perSeKr3t!'

    get '/' do
      session!
      'Hello, ' + session[:name] + '! Click <a href="/logout">here</a> to logout.'
    end

    get '/login' do
      if session?
        redirect '/'
      else
        '<form method="POST" action="/login">' +
        'Please enter your name: <input type="text" name="name">' +
        '<input type="submit" value="Submit">' +
        '</form>'
      end
    end

    post '/login' do
      if params[:name]
        session_start!
        session[:name] = params[:name]
        redirect '/'
      else
        redirect '/login'
      end
    end

    get '/logout' do
      session_end!
      redirect '/'
    end

Modular apps use very similar code but must also mixin Sinatra::Session via
Sinatra#register, like so:

    require 'sinatra/base'
    require 'sinatra/session'

    class MyApp < Sinatra::Base
      register Sinatra::Session

      # insert settings and routes here, same as in
      # classic example above
    end

License
-------

Copyright 2010 Michael Jackson

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.