Class: Authlogic::Session::Base

Inherits:
Object
  • Object
show all
Includes:
Authlogic::Session, ActiveRecordTrickery, Callbacks, Config, Cookies, Params, Perishability, Scopes
Defined in:
lib/authlogic/session/base.rb,
lib/authlogic.rb

Overview

Base

This is the muscle behind Authlogic. For detailed information on how to use this please refer to the README. For detailed method explanations see below.

Constant Summary

Constants included from Callbacks

Callbacks::CALLBACKS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Config

included

Methods included from Scopes

included

Methods included from Perishability

included

Methods included from Params

#valid_params?

Methods included from Cookies

included, #valid_cookie?

Methods included from Callbacks

#destroy_with_callbacks, #find_record_with_callbacks, included, #save_with_callbacks, #validate_with_callbacks

Methods included from ActiveRecordTrickery

included

Constructor Details

#initialize(*args) ⇒ Base

You can initialize a session by doing any of the following:

UserSession.new
UserSession.new(:login => "login", :password => "password", :remember_me => true)
UserSession.new(User.first, true)

If a user has more than one session you need to pass an id so that Authlogic knows how to differentiate the sessions. The id MUST be a Symbol.

UserSession.new(:my_id)
UserSession.new({:login => "login", :password => "password", :remember_me => true}, :my_id)
UserSession.new(User.first, true, :my_id)

For more information on ids see the id method.

Lastly, the reason the id is separate from the first parameter hash is becuase this should be controlled by you, not by what the user passes. A user could inject their own id and things would not work as expected.

Raises:



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# File 'lib/authlogic/session/base.rb', line 107

def initialize(*args)
  raise NotActivated.new(self) unless self.class.activated?
  
  create_configurable_methods!
  
  self.id = args.pop if args.last.is_a?(Symbol)
  
  if args.first.is_a?(Hash)
    self.credentials = args.first
  elsif !args.first.blank? && args.first.class < ::ActiveRecord::Base
    self.unauthorized_record = args.first
    self.remember_me = args[1] if args.size > 1
  end
end

Instance Attribute Details

#authenticating_withObject

A flag for how the user is logging in. Possible values:

  • :password - username and password

  • :unauthorized_record - an actual ActiveRecord object

By default this is :password



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# File 'lib/authlogic/session/base.rb', line 128

def authenticating_with
  @authenticating_with ||= :password
end

#idObject

Allows you to set a unique identifier for your session, so that you can have more than 1 session at a time. A good example when this might be needed is when you want to have a normal user session and a “secure” user session. The secure user session would be created only when they want to modify their billing information, or other sensitive information. Similar to me.com. This requires 2 user sessions. Just use an id for the “secure” session and you should be good.

You can set the id during initialization (see initialize for more information), or as an attribute:

session.id = :my_id

Just be sure and set your id before you save your session.

Lastly, to retrieve your session with the id check out the find class method.



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# File 'lib/authlogic/session/base.rb', line 216

def id
  @id
end

#new_sessionObject

Returns the value of attribute new_session



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# File 'lib/authlogic/session/base.rb', line 87

def new_session
  @new_session
end

#persistingObject

:nodoc:



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# File 'lib/authlogic/session/base.rb', line 237

def persisting # :nodoc:
  return @persisting if defined?(@persisting)
  @persisting = true
end

#recordObject

Returns the value of attribute record



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# File 'lib/authlogic/session/base.rb', line 88

def record
  @record
end

#unauthorized_recordObject

Returns the value of attribute unauthorized_record



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# File 'lib/authlogic/session/base.rb', line 88

def unauthorized_record
  @unauthorized_record
end

Class Method Details

.activated?Boolean

Returns true if a controller have been set and can be used properly. This MUST be set before anything can be done. Similar to how ActiveRecord won't allow you to do anything without establishing a DB connection. In your framework environment this is done for you, but if you are using Authlogic outside of your frameword, you need to assign a controller object to Authlogic via Authlogic::Session::Base.controller = obj.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 13

def activated?
  !controller.blank?
end

.controllerObject

:nodoc:



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# File 'lib/authlogic/session/base.rb', line 21

def controller # :nodoc:
  Thread.current[:authlogic_controller]
end

.controller=(value) ⇒ Object

:nodoc:



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# File 'lib/authlogic/session/base.rb', line 17

def controller=(value) # :nodoc:
  Thread.current[:authlogic_controller] = value
end

.create(*args, &block) ⇒ Object

A convenince method. The same as:

session = UserSession.new
session.create


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# File 'lib/authlogic/session/base.rb', line 29

def create(*args, &block)
  session = new(*args)
  session.save(&block)
end

.create!(*args) ⇒ Object

Same as create but calls create!, which raises an exception when authentication fails



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# File 'lib/authlogic/session/base.rb', line 35

def create!(*args)
  session = new(*args)
  session.save!
end

.find(id = nil) ⇒ Object

A convenience method for session.find_record. Finds your session by parameters, then session, then cookie, and finally by basic http auth. This is perfect for persisting your session:

helper_method :current_user_session, :current_user

def current_user_session
  return @current_user_session if defined?(@current_user_session)
  @current_user_session = UserSession.find
end

def current_user
  return @current_user if defined?(@current_user)
  @current_user = current_user_session && current_user_session.user
end

Accepts a single parameter as the id, to find session that you marked with an id:

UserSession.find(:secure)

See the id method for more information on ids.



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# File 'lib/authlogic/session/base.rb', line 60

def find(id = nil)
  args = [id].compact
  session = new(*args)
  return session if session.find_record
  nil
end

.klassObject

The name of the class that this session is authenticating with. For example, the UserSession class will authenticate with the User class unless you specify otherwise in your configuration.



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# File 'lib/authlogic/session/base.rb', line 69

def klass
  @klass ||=
    if klass_name
      klass_name.constantize
    else
      nil
    end
end

.klass_nameObject

Same as klass, just returns a string instead of the actual constant.



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# File 'lib/authlogic/session/base.rb', line 79

def klass_name
  @klass_name ||= 
    if guessed_name = name.scan(/(.*)Session/)[0]
      @klass_name = guessed_name[0]
    end
end

Instance Method Details

#authenticating_with_password?Boolean

Returns true if logging in with credentials. Credentials mean username and password.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 133

def authenticating_with_password?
  authenticating_with == :password
end

#authenticating_with_unauthorized_record?Boolean Also known as: authenticating_with_record?

Returns true if logging in with an unauthorized record

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 138

def authenticating_with_unauthorized_record?
  authenticating_with == :unauthorized_record
end

#credentialsObject

Your login credentials in hash format. Usually => “my login”, :password => “<protected>” depending on your configuration. Password is protected as a security measure. The raw password should never be publicly accessible.



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# File 'lib/authlogic/session/base.rb', line 145

def credentials
  { => send(), password_field => "<Protected>"}
end

#credentials=(values) ⇒ Object

Lets you set your loging and password via a hash format. This is “params” safe. It only allows for 3 keys: your login field name, password field name, and remember me.



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# File 'lib/authlogic/session/base.rb', line 150

def credentials=(values)
  return if values.blank? || !values.is_a?(Hash)
  values.symbolize_keys!
  values.each do |field, value|
    next if value.blank?
    send("#{field}=", value)
  end
end

#destroyObject

Resets everything, your errors, record, cookies, and session. Basically “logs out” a user.



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# File 'lib/authlogic/session/base.rb', line 160

def destroy
  errors.clear
  @record = nil
  true
end

#errorsObject

The errors in Authlogic work JUST LIKE ActiveRecord. In fact, it uses the exact same ActiveRecord errors class. Use it the same way:

Example

class UserSession
  before_validation :check_if_awesome

  private
    def check_if_awesome
      errors.add(:login, "must contain awesome") if  && !.include?("awesome")
      errors.add_to_base("You must be awesome to log in") unless record.awesome?
    end
end


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# File 'lib/authlogic/session/base.rb', line 179

def errors
  @errors ||= Errors.new(self)
end

#find_recordObject

Attempts to find the record by params, then session, then cookie, and finally basic http auth. See the class level find method if you are wanting to use this to persist your session.



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# File 'lib/authlogic/session/base.rb', line 184

def find_record
  if record
    self.new_session = false
    return record
  end
  
  find_with.each do |find_method|
    if send("valid_#{find_method}?")
      self.new_session = false
      
      if record.class.column_names.include?("last_request_at") && (record.last_request_at.blank? || last_request_at_threshold.ago >= record.last_request_at)
        record.last_request_at = Time.now
        record.save_without_session_maintenance(false)
      end
      
      return record
    end
  end
  nil
end

#inspectObject

:nodoc:



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# File 'lib/authlogic/session/base.rb', line 220

def inspect # :nodoc:
  details = {}
  case authenticating_with
  when :unauthorized_record
    details[:unauthorized_record] = "<protected>"
  else
    details[.to_sym] = send()
    details[password_field.to_sym] = "<protected>"
  end
  "#<#{self.class.name} #{details.inspect}>"
end

#new_session?Boolean

Similar to ActiveRecord's new_record? Returns true if the session has not been saved yet.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 233

def new_session?
  new_session != false
end

#persisting?Boolean

Returns true if the session is being persisted. This is set to false if the session was found by the single_access_token, since logging in via a single access token should not remember the user in the session or the cookie.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 244

def persisting?
  persisting == true
end

#remember_meObject

:nodoc:



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# File 'lib/authlogic/session/base.rb', line 248

def remember_me # :nodoc:
  return @remember_me if defined?(@remember_me)
  @remember_me = self.class.remember_me
end

#remember_me=(value) ⇒ Object

Accepts a boolean as a flag to remember the session or not. Basically to expire the cookie at the end of the session or keep it for “remember_me_until”.



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# File 'lib/authlogic/session/base.rb', line 254

def remember_me=(value)
  @remember_me = value
end

#remember_me?Boolean

Allows users to be remembered via a cookie.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 259

def remember_me?
  remember_me == true || remember_me == "true" || remember_me == "1"
end

#remember_me_untilObject

When to expire the cookie. See remember_me_for configuration option to change this.



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# File 'lib/authlogic/session/base.rb', line 264

def remember_me_until
  return unless remember_me?
  remember_me_for.from_now
end

#save {|result| ... } ⇒ Object

Creates / updates a new user session for you. It does all of the magic:

  1. validates

  2. sets session

  3. sets cookie

  4. updates magic fields

Yields:

  • (result)


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# File 'lib/authlogic/session/base.rb', line 275

def save(&block)
  result = nil
  if valid?
    record. = (record..blank? ? 1 : record. + 1) if record.respond_to?(:login_count)
    
    if record.respond_to?(:current_login_at)
      record. = record. if record.respond_to?(:last_login_at)
      record. = Time.now
    end
    
    if record.respond_to?(:current_login_ip)
      record. = record. if record.respond_to?(:last_login_ip)
      record. = controller.request.remote_ip
    end
    
    record.save_without_session_maintenance(false)
    
    self.new_session = false
    result = self
  else
    result = false
  end
  
  yield result if block_given?
  result
end

#save!Object

Same as save but raises an exception when authentication fails

Raises:



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# File 'lib/authlogic/session/base.rb', line 303

def save!
  result = save
  raise SessionInvalid.new(self) unless result
  result
end

#valid?Boolean

Returns if the session is valid or not. Basically it means that a record could or could not be found. If the session is valid you will have a result when calling the “record” method. If it was unsuccessful you will not have a record.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 322

def valid?
  errors.clear
  if valid_credentials?
    validate
    valid_record?
    return true if errors.empty?
  end
  
  self.record = nil
  false
end

#valid_http_auth?Boolean

Tries to validate the session from information from a basic http auth, if it was provided.

Returns:

  • (Boolean)


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# File 'lib/authlogic/session/base.rb', line 335

def valid_http_auth?
  controller.authenticate_with_http_basic do |, password|
    if !.blank? && !password.blank?
      send("#{}=", )
      send("#{password_field}=", password)
      return valid?
    end
  end
  
  false
end

#validateObject

Overwite this method to add your own validation, or use callbacks: before_validation, after_validation



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# File 'lib/authlogic/session/base.rb', line 348

def validate
end