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Informations about the package fig-cookies
FIG Cookies
Managing Cookies for PSR-7 Requests and Responses.
Installation
Concepts
FIG Cookies tackles two problems, managing Cookie Request headers and
managing Set-Cookie Response headers. It does this by way of introducing
a Cookies class to manage collections of Cookie instances and a
SetCookies class to manage collections of SetCookie instances.
Instantiating these collections looks like this:
After modifying these collections in some way, they are rendered into a PSR-7 Request or PSR-7 Response like this:
Like PSR-7 Messages, Cookie, Cookies, SetCookie, and SetCookies
are all represented as immutable value objects and all mutators will
return new instances of the original with the requested changes.
While this style of design has many benefits it can become fairly verbose very quickly. In order to get around that, FIG Cookies provides two facades in an attempt to help simplify things and make the whole process less verbose.
Basic Usage
The easiest way to start working with FIG Cookies is by using the
FigRequestCookies and FigResponseCookies classes. They are facades to the
primitive FIG Cookies classes. Their jobs are to make common cookie related
tasks easier and less verbose than working with the primitive classes directly.
There is overhead on creating Cookies and SetCookies and rebuilding
requests and responses. Each of the FigCookies methods will go through this
process so be wary of using too many of these calls in the same section of
code. In some cases it may be better to work with the primitive FIG Cookies
classes directly rather than using the facades.
Request Cookies
Requests include cookie information in the Cookie request header. The
cookies in this header are represented by the Cookie class.
To easily work with request cookies, use the FigRequestCookies facade.
Get a Request Cookie
The get method will return a Cookie instance. If no cookie by the specified
name exists, the returned Cookie instance will have a null value.
The optional third parameter to get sets the value that should be used if a
cookie does not exist.
Set a Request Cookie
The set method will either add a cookie or replace an existing cookie.
The Cookie primitive is used as the second argument.
Modify a Request Cookie
The modify method allows for replacing the contents of a cookie based on the
current cookie with the specified name. The third argument is a callable that
takes a Cookie instance as its first argument and is expected to return a
Cookie instance.
If no cookie by the specified name exists, a new Cookie instance with a
null value will be passed to the callable.
Remove a Request Cookie
The remove method removes a cookie from the request headers if it exists.
Note that this does not cause the client to remove the cookie. Take a look at
the SetCookie class' expire() method to do that.
Response Cookies
Responses include cookie information in the Set-Cookie response header. The
cookies in these headers are represented by the SetCookie class.
To easily work with response cookies, use the FigResponseCookies facade.
Get a Response Cookie
The get method will return a SetCookie instance. If no cookie by the
specified name exists, the returned SetCookie instance will have a null
value.
The optional third parameter to get sets the value that should be used if a
cookie does not exist.
Set a Response Cookie
The set method will either add a cookie or replace an existing cookie.
The SetCookie primitive is used as the second argument.
Modify a Response Cookie
The modify method allows for replacing the contents of a cookie based on the
current cookie with the specified name. The third argument is a callable that
takes a SetCookie instance as its first argument and is expected to return a
SetCookie instance.
If no cookie by the specified name exists, a new SetCookie instance with a
null value will be passed to the callable.
Remove a Response Cookie
The remove method removes a cookie from the response if it exists.
Expire a Response Cookie
The expire method sets a cookie with an expiry date in the far past. This
causes the client to remove the cookie.
Note that in order to expire a cookie, you need to configure its Set-Cookie
header just like when you initially wrote the cookie (i.e. same domain/path).
The easiest way to do this is to re-use the same code for configuring the
header when setting as well as expiring the cookie:
FAQ
Do you call setcookies?
No.
Delivery of the rendered SetCookie instances is the responsibility of the
PSR-7 client implementation.
Do you do anything with sessions?
No.
It would be possible to build session handling using cookies on top of FIG Cookies but it is out of scope for this package.
Do you read from $_COOKIES?
No.
FIG Cookies only pays attention to the Cookie headers on
PSR-7 Request
instances. In the case of ServerRequestInterface instances, PSR-7
implementations should be including $_COOKIES values in the headers
so in that case FIG Cookies may be interacting with $_COOKIES
indirectly.
License
MIT, see LICENSE.
Community
Want to get involved? Here are a few ways:
- Find us in the #dflydev IRC channel on irc.freenode.org.
- Mention @dflydev on Twitter.
