public class CookieManager extends CookieHandler
CookieHandler, which separates the storage of cookies from the policy surrounding accepting and rejecting cookies. A CookieManager is initialized with a
CookieStorewhich manages storage, and a
CookiePolicyobject, 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 CookieHanlder 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 NetscapeCookieSotre.
There're various ways user can hook up his own HTTP cookie management behavior, e.g.
- Use CookieHandler.setDefault to set a brand new
- Let CookieManager be the default
CookieHandlerimplementation, but implement user's own
CookiePolicyand 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
CookieHandlerimplementation, 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.
|Constructor and Description|
Create a new cookie manager.
|Modifier and Type||Method and Description|
Gets all the applicable cookies from a cookie cache for the specified uri in the request header.
To retrieve current cookie store.
Sets all the applicable cookies, examples are response header fields that are named Set-Cookie2, present in the response headers into a cookie cache.
This constructor will create new cookie manager with default cookie store and accept policy. The effect is same as CookieManager(null, null).
public CookieManager(CookieStore store, CookiePolicy cookiePolicy)
store- a CookieStore to be used by cookie manager. if null, cookie manager will use a default one, which is an in-memory CookieStore implmentation.
cookiePolicy- a CookiePolicy instance to be used by cookie manager as policy callback. if null, ACCEPT_ORIGINAL_SERVER will be used.
public void setCookiePolicy(CookiePolicy cookiePolicy)
public CookieStore getCookieStore()
public Map<String,List<String>> get(URI uri, Map<String,List<String>> requestHeaders) throws IOException
URI passed as an argument specifies the intended use for
the cookies. In particular the scheme should reflect whether the cookies
The host part should reflect either the destination of the cookies or
It is up to the implementation to take into account the
the cookies attributes and security settings to determine which ones
should be returned.
HTTP protocol implementers should make sure that this method is called after all request headers related to choosing cookies are added, and before the request is sent.
URIrepresenting the intended use for the cookies
requestHeaders- - a Map from request header field names to lists of field values representing the current request headers
IOException- if an I/O error occurs
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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