Module java.base
Package java.net

Class CookieManager

java.lang.Object
java.net.CookieHandler
java.net.CookieManager
public class CookieManager
extends CookieHandler
CookieManager provides a concrete implementation of CookieHandler, which separates the storage of cookies from the policy surrounding accepting and rejecting cookies. A CookieManager is initialized with a CookieStore which manages storage, and a CookiePolicy object, which makes policy decisions on cookie acceptance/rejection.

The HTTP cookie management in java.net package looks like: 


                  use
 CookieHandler <------- HttpURLConnection
       ^
       | impl
       |         use
 CookieManager -------> CookiePolicy
             |   use
             |--------> HttpCookie
             |              ^
             |              | use
             |   use        |
             |--------> CookieStore
                            ^
                            | impl
                            |
                  Internal in-memory implementation
  • CookieHandler is at the core of cookie management. User can call CookieHandler.setDefault to set a concrete CookieHandler implementation to be used.
  • CookiePolicy.shouldAccept will be called by CookieManager.put to see whether or not one cookie should be accepted and put into cookie store. User can use any of three pre-defined CookiePolicy, namely ACCEPT_ALL, ACCEPT_NONE and ACCEPT_ORIGINAL_SERVER, or user can define his own CookiePolicy implementation and tell CookieManager to use it.
  • CookieStore is the place where any accepted HTTP cookie is stored in. If not specified when created, a CookieManager instance will use an internal in-memory implementation. Or user can implements one and tell CookieManager to use it.
  • Currently, only CookieStore.add(URI, HttpCookie) and CookieStore.get(URI) are used by CookieManager. Others are for completeness and might be needed by a more sophisticated CookieStore implementation, e.g. a NetscapeCookieStore.

There're various ways user can hook up his own HTTP cookie management behavior, e.g.

  • Use CookieHandler.setDefault to set a brand new CookieHandler implementation
  • Let CookieManager be the default CookieHandler implementation, but implement user's own CookieStore and CookiePolicy and tell default CookieManager to use them: 
           // this should be done at the beginning of an HTTP session
       CookieHandler.setDefault(new CookieManager(new MyCookieStore(), new MyCookiePolicy()));
  • Let CookieManager be the default CookieHandler implementation, but use customized CookiePolicy: 
           // this should be done at the beginning of an HTTP session
       CookieHandler.setDefault(new CookieManager());
       // this can be done at any point of an HTTP session
       ((CookieManager)CookieHandler.getDefault()).setCookiePolicy(new MyCookiePolicy());

The implementation conforms to RFC 2965, section 3.3.

Since:
1.6
See Also:
CookiePolicy

  • Constructor Details

    • CookieManager

      public CookieManager()
      Create a new cookie manager.

      This constructor will create new cookie manager with default cookie store and accept policy. The effect is same as CookieManager(null, null).

    • CookieManager

      public CookieManager​(CookieStore store, CookiePolicy cookiePolicy)
      Create a new cookie manager with specified cookie store and cookie policy.
      Parameters:
      store - a CookieStore to be used by cookie manager. if null, cookie manager will use a default one, which is an in-memory CookieStore implementation.
      cookiePolicy - a CookiePolicy instance to be used by cookie manager as policy callback. if null, ACCEPT_ORIGINAL_SERVER will be used.

  • Method Details

    • setCookiePolicy

      public void setCookiePolicy​(CookiePolicy cookiePolicy)
      To set the cookie policy of this cookie manager.

      A instance of CookieManager will have cookie policy ACCEPT_ORIGINAL_SERVER by default. Users always can call this method to set another cookie policy.

      Parameters:
      cookiePolicy - the cookie policy. Can be null, which has no effects on current cookie policy.

    • getCookieStore

      public CookieStore getCookieStore()
      To retrieve current cookie store.
      Returns:
      the cookie store currently used by cookie manager.