jdk/src/share/classes/java/net/CookieHandler.java
changeset 2 90ce3da70b43
child 708 a780486c413c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/net/CookieHandler.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2003-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.net;
+
+import java.util.Map;
+import java.util.List;
+import java.io.IOException;
+import sun.security.util.SecurityConstants;
+
+/**
+ * A CookieHandler object provides a callback mechanism to hook up a
+ * HTTP state management policy implementation into the HTTP protocol
+ * handler. The HTTP state management mechanism specifies a way to
+ * create a stateful session with HTTP requests and responses.
+ *
+ * <p>A system-wide CookieHandler that to used by the HTTP protocol
+ * handler can be registered by doing a
+ * CookieHandler.setDefault(CookieHandler). The currently registered
+ * CookieHandler can be retrieved by calling
+ * CookieHandler.getDefault().
+ *
+ * For more information on HTTP state management, see <a
+ * href="http://www.ietf.org/rfc/rfc2965.txt""><i>RFC&nbsp;2965: HTTP
+ * State Management Mechanism</i></a>
+ *
+ * @author Yingxian Wang
+ * @since 1.5
+ */
+public abstract class CookieHandler {
+    /**
+     * The system-wide cookie handler that will apply cookies to the
+     * request headers and manage cookies from the response headers.
+     *
+     * @see setDefault(CookieHandler)
+     * @see getDefault()
+     */
+    private static CookieHandler cookieHandler;
+
+    /**
+     * Gets the system-wide cookie handler.
+     *
+     * @return the system-wide cookie handler; A null return means
+     *        there is no system-wide cookie handler currently set.
+     * @throws SecurityException
+     *       If a security manager has been installed and it denies
+     * {@link NetPermission}<tt>("getCookieHandler")</tt>
+     * @see #setDefault(CookieHandler)
+     */
+    public synchronized static CookieHandler getDefault() {
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            sm.checkPermission(SecurityConstants.GET_COOKIEHANDLER_PERMISSION);
+        }
+        return cookieHandler;
+    }
+
+    /**
+     * Sets (or unsets) the system-wide cookie handler.
+     *
+     * Note: non-standard http protocol handlers may ignore this setting.
+     *
+     * @param cHandler The HTTP cookie handler, or
+     *       <code>null</code> to unset.
+     * @throws SecurityException
+     *       If a security manager has been installed and it denies
+     * {@link NetPermission}<tt>("setCookieHandler")</tt>
+     * @see #getDefault()
+     */
+    public synchronized static void setDefault(CookieHandler cHandler) {
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            sm.checkPermission(SecurityConstants.SET_COOKIEHANDLER_PERMISSION);
+        }
+        cookieHandler = cHandler;
+    }
+
+    /**
+     * Gets all the applicable cookies from a cookie cache for the
+     * specified uri in the request header.
+     *
+     * 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.
+     *
+     * @param uri a <code>URI</code> to send cookies to in a request
+     * @param requestHeaders - a Map from request header
+     *            field names to lists of field values representing
+     *            the current request headers
+     * @return an immutable map from state management headers, with
+     *            field names "Cookie" or "Cookie2" to a list of
+     *            cookies containing state information
+     *
+     * @throws IOException if an I/O error occurs
+     * @throws IllegalArgumentException if either argument is null
+     * @see #put(URI, Map)
+     */
+    public abstract Map<String, List<String>>
+        get(URI uri, Map<String, List<String>> requestHeaders)
+        throws IOException;
+
+    /**
+     * Sets all the applicable cookies, examples are response header
+     * fields that are named Set-Cookie2, present in the response
+     * headers into a cookie cache.
+     *
+     * @param uri a <code>URI</code> where the cookies come from
+     * @param responseHeaders an immutable map from field names to
+     *            lists of field values representing the response
+     *            header fields returned
+     * @throws  IOException if an I/O error occurs
+     * @throws  IllegalArgumentException if either argument is null
+     * @see #get(URI, Map)
+     */
+    public abstract void
+        put(URI uri, Map<String, List<String>> responseHeaders)
+        throws IOException;
+}