ActionDispatch::Cookies (original) (raw)

Read and write data to cookies through ActionController::Cookies#cookies.

When reading cookie data, the data is read from the HTTP request header, Cookie. When writing cookie data, the data is sent out in the HTTP response header, Set-Cookie.

Examples of writing:

# Sets a simple session cookie.
# This cookie will be deleted when the user's browser is closed.
cookies[:user_name] = "david"

# Cookie values are String-based. Other data types need to be serialized.
cookies[:lat_lon] = JSON.generate([47.68, -122.37])

# Sets a cookie that expires in 1 hour.
cookies[:login] = { value: "XJ-122", expires: 1.hour }

# Sets a cookie that expires at a specific time.
cookies[:login] = { value: "XJ-122", expires: Time.utc(2020, 10, 15, 5) }

# Sets a signed cookie, which prevents users from tampering with its value.
cookies.signed[:user_id] = current_user.id
# It can be read using the signed method.
cookies.signed[:user_id] # => 123

# Sets an encrypted cookie value before sending it to the client which
# prevent users from reading and tampering with its value.
cookies.encrypted[:discount] = 45
# It can be read using the encrypted method.
cookies.encrypted[:discount] # => 45

# Sets a "permanent" cookie (which expires in 20 years from now).
cookies.permanent[:login] = "XJ-122"

# You can also chain these methods:
cookies.signed.permanent[:login] = "XJ-122"

Examples of reading:

cookies[:user_name]           # => "david"
cookies.size                  # => 2
JSON.parse(cookies[:lat_lon]) # => [47.68, -122.37]
cookies.signed[:login]        # => "XJ-122"
cookies.encrypted[:discount]  # => 45

Example for deleting:

cookies.delete :user_name

Please note that if you specify a :domain when setting a cookie, you must also specify the domain when deleting the cookie:

cookies[:name] = {
  value: 'a yummy cookie',
  expires: 1.year,
  domain: 'domain.com'
}

cookies.delete(:name, domain: 'domain.com')

The option symbols for setting cookies are:

:value - The cookie’s value.
:path - The path for which this cookie applies. Defaults to the root of the application.
:domain - The domain for which this cookie applies so you can restrict to the domain level. If you use a schema like <www.example.com> and want to share session with user.example.com set :domain to :all. To support multiple domains, provide an array, and the first domain matching request.host will be used. Make sure to specify the :domain option with :all or Array again when deleting cookies. For more flexibility you can set the domain on a per-request basis by specifying :domain with a proc.

domain: nil  # Does not set cookie domain. (default)  
domain: :all # Allow the cookie for the top most level  
             # domain and subdomains.  
domain: %w(.example.com .example.org) # Allow the cookie  
                                      # for concrete domain names.  
domain: proc { Tenant.current.cookie_domain } # Set cookie domain dynamically  
domain: proc { |req| ".sub.#{req.host}" }     # Set cookie domain dynamically based on request

:tld_length - When using :domain => :all, this option can be used to explicitly set the TLD length when using a short (<= 3 character) domain that is being interpreted as part of a TLD. For example, to share cookies between user1.lvh.me and user2.lvh.me, set :tld_length to 2.
:expires - The time at which this cookie expires, as a Time or ActiveSupport::Duration object.
:secure - Whether this cookie is only transmitted to HTTPS servers. Default is false.
:httponly - Whether this cookie is accessible via scripting or only HTTP. Defaults to false.
:same_site - The value of the SameSite cookie attribute, which determines how this cookie should be restricted in cross-site contexts. Possible values are nil, :none, :lax, and :strict. Defaults to :lax.

Namespace

MODULE ActionDispatch::Cookies::ChainedCookieJars

Methods

call

Constants

AUTHENTICATED_ENCRYPTED_COOKIE_SALT	=	"action_dispatch.authenticated_encrypted_cookie_salt"

COOKIES_DIGEST	=	"action_dispatch.cookies_digest"

COOKIES_ROTATIONS	=	"action_dispatch.cookies_rotations"

COOKIES_SAME_SITE_PROTECTION	=	"action_dispatch.cookies_same_site_protection"

COOKIES_SERIALIZER	=	"action_dispatch.cookies_serializer"

CookieOverflow	=	Class.new StandardError
	Raised when storing more than 4K of session data.
ENCRYPTED_COOKIE_CIPHER	=	"action_dispatch.encrypted_cookie_cipher"

ENCRYPTED_COOKIE_SALT	=	"action_dispatch.encrypted_cookie_salt"

ENCRYPTED_SIGNED_COOKIE_SALT	=	"action_dispatch.encrypted_signed_cookie_salt"

GENERATOR_KEY	=	"action_dispatch.key_generator"

HTTP_HEADER	=	"Set-Cookie"

MAX_COOKIE_SIZE	=	4096
	Cookies can typically store 4096 bytes.
SECRET_KEY_BASE	=	"action_dispatch.secret_key_base"

SIGNED_COOKIE_DIGEST	=	"action_dispatch.signed_cookie_digest"

SIGNED_COOKIE_SALT	=	"action_dispatch.signed_cookie_salt"

USE_AUTHENTICATED_COOKIE_ENCRYPTION	=	"action_dispatch.use_authenticated_cookie_encryption"

USE_COOKIES_WITH_METADATA	=	"action_dispatch.use_cookies_with_metadata"

Class Public methods

Instance Public methods

call(env)Link

Source: show | on GitHub

def call(env) request = ActionDispatch::Request.new(env) response = @app.call(env)

if request.have_cookie_jar? cookie_jar = request.cookie_jar unless cookie_jar.committed? response = Rack::Response[*response] cookie_jar.write(response) end end

response.to_a end