Java tutorial
/* * Copyright (C) 2006 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.webkit; import android.annotation.Nullable; import android.annotation.SystemApi; import android.net.WebAddress; /** * Manages the cookies used by an application's {@link WebView} instances. * Cookies are manipulated according to RFC2109. */ public abstract class CookieManager { @Override protected Object clone() throws CloneNotSupportedException { throw new CloneNotSupportedException("doesn't implement Cloneable"); } /** * Gets the singleton CookieManager instance. * * @return the singleton CookieManager instance */ public static CookieManager getInstance() { return WebViewFactory.getProvider().getCookieManager(); } /** * Sets whether the application's {@link WebView} instances should send and * accept cookies. * By default this is set to {@code true} and the WebView accepts cookies. * <p> * When this is {@code true} * {@link CookieManager#setAcceptThirdPartyCookies setAcceptThirdPartyCookies} and * {@link CookieManager#setAcceptFileSchemeCookies setAcceptFileSchemeCookies} * can be used to control the policy for those specific types of cookie. * * @param accept whether {@link WebView} instances should send and accept * cookies */ public abstract void setAcceptCookie(boolean accept); /** * Gets whether the application's {@link WebView} instances send and accept * cookies. * * @return {@code true} if {@link WebView} instances send and accept cookies */ public abstract boolean acceptCookie(); /** * Sets whether the {@link WebView} should allow third party cookies to be set. * Allowing third party cookies is a per WebView policy and can be set * differently on different WebView instances. * <p> * Apps that target {@link android.os.Build.VERSION_CODES#KITKAT} or below * default to allowing third party cookies. Apps targeting * {@link android.os.Build.VERSION_CODES#LOLLIPOP} or later default to disallowing * third party cookies. * * @param webview the {@link WebView} instance to set the cookie policy on * @param accept whether the {@link WebView} instance should accept * third party cookies */ public abstract void setAcceptThirdPartyCookies(WebView webview, boolean accept); /** * Gets whether the {@link WebView} should allow third party cookies to be set. * * @param webview the {@link WebView} instance to get the cookie policy for * @return {@code true} if the {@link WebView} accepts third party cookies */ public abstract boolean acceptThirdPartyCookies(WebView webview); /** * Sets a cookie for the given URL. Any existing cookie with the same host, * path and name will be replaced with the new cookie. The cookie being set * will be ignored if it is expired. * * @param url the URL for which the cookie is to be set * @param value the cookie as a string, using the format of the 'Set-Cookie' * HTTP response header */ public abstract void setCookie(String url, String value); /** * Sets a cookie for the given URL. Any existing cookie with the same host, * path and name will be replaced with the new cookie. The cookie being set * will be ignored if it is expired. * <p> * This method is asynchronous. * If a {@link ValueCallback} is provided, * {@link ValueCallback#onReceiveValue(T) onReceiveValue()} will be called on the current * thread's {@link android.os.Looper} once the operation is complete. * The value provided to the callback indicates whether the cookie was set successfully. * You can pass {@code null} as the callback if you don't need to know when the operation * completes or whether it succeeded, and in this case it is safe to call the method from a * thread without a Looper. * * @param url the URL for which the cookie is to be set * @param value the cookie as a string, using the format of the 'Set-Cookie' * HTTP response header * @param callback a callback to be executed when the cookie has been set */ public abstract void setCookie(String url, String value, @Nullable ValueCallback<Boolean> callback); /** * Gets the cookies for the given URL. * * @param url the URL for which the cookies are requested * @return value the cookies as a string, using the format of the 'Cookie' * HTTP request header */ public abstract String getCookie(String url); /** * See {@link #getCookie(String)}. * * @param url the URL for which the cookies are requested * @param privateBrowsing whether to use the private browsing cookie jar * @return value the cookies as a string, using the format of the 'Cookie' * HTTP request header * @hide Used by Browser and by WebViewProvider implementations. */ @SystemApi public abstract String getCookie(String url, boolean privateBrowsing); /** * Gets cookie(s) for a given uri so that it can be set to "cookie:" in http * request header. * * @param uri the WebAddress for which the cookies are requested * @return value the cookies as a string, using the format of the 'Cookie' * HTTP request header * @hide Used by RequestHandle and by WebViewProvider implementations. */ @SystemApi public synchronized String getCookie(WebAddress uri) { return getCookie(uri.toString()); } /** * Removes all session cookies, which are cookies without an expiration * date. * @deprecated use {@link #removeSessionCookies(ValueCallback)} instead. */ @Deprecated public abstract void removeSessionCookie(); /** * Removes all session cookies, which are cookies without an expiration * date. * <p> * This method is asynchronous. * If a {@link ValueCallback} is provided, * {@link ValueCallback#onReceiveValue(T) onReceiveValue()} will be called on the current * thread's {@link android.os.Looper} once the operation is complete. * The value provided to the callback indicates whether any cookies were removed. * You can pass {@code null} as the callback if you don't need to know when the operation * completes or whether any cookie were removed, and in this case it is safe to call the * method from a thread without a Looper. * @param callback a callback which is executed when the session cookies have been removed */ public abstract void removeSessionCookies(@Nullable ValueCallback<Boolean> callback); /** * Removes all cookies. * @deprecated Use {@link #removeAllCookies(ValueCallback)} instead. */ @Deprecated public abstract void removeAllCookie(); /** * Removes all cookies. * <p> * This method is asynchronous. * If a {@link ValueCallback} is provided, * {@link ValueCallback#onReceiveValue(T) onReceiveValue()} will be called on the current * thread's {@link android.os.Looper} once the operation is complete. * The value provided to the callback indicates whether any cookies were removed. * You can pass {@code null} as the callback if you don't need to know when the operation * completes or whether any cookies were removed, and in this case it is safe to call the * method from a thread without a Looper. * @param callback a callback which is executed when the cookies have been removed */ public abstract void removeAllCookies(@Nullable ValueCallback<Boolean> callback); /** * Gets whether there are stored cookies. * * @return {@code true} if there are stored cookies */ public abstract boolean hasCookies(); /** * See {@link #hasCookies()}. * * @param privateBrowsing whether to use the private browsing cookie jar * @hide Used by Browser and WebViewProvider implementations. */ @SystemApi public abstract boolean hasCookies(boolean privateBrowsing); /** * Removes all expired cookies. * @deprecated The WebView handles removing expired cookies automatically. */ @Deprecated public abstract void removeExpiredCookie(); /** * Ensures all cookies currently accessible through the getCookie API are * written to persistent storage. * This call will block the caller until it is done and may perform I/O. */ public abstract void flush(); /** * Gets whether the application's {@link WebView} instances send and accept * cookies for file scheme URLs. * * @return {@code true} if {@link WebView} instances send and accept cookies for * file scheme URLs */ // Static for backward compatibility. public static boolean allowFileSchemeCookies() { return getInstance().allowFileSchemeCookiesImpl(); } /** * Implements {@link #allowFileSchemeCookies()}. * * @hide Only for use by WebViewProvider implementations */ @SystemApi protected abstract boolean allowFileSchemeCookiesImpl(); /** * Sets whether the application's {@link WebView} instances should send and * accept cookies for file scheme URLs. * Use of cookies with file scheme URLs is potentially insecure and turned * off by default. * Do not use this feature unless you can be sure that no unintentional * sharing of cookie data can take place. * <p> * Note that calls to this method will have no effect if made after a * {@link WebView} or CookieManager instance has been created. */ // Static for backward compatibility. public static void setAcceptFileSchemeCookies(boolean accept) { getInstance().setAcceptFileSchemeCookiesImpl(accept); } /** * Implements {@link #setAcceptFileSchemeCookies(boolean)}. * * @hide Only for use by WebViewProvider implementations */ @SystemApi protected abstract void setAcceptFileSchemeCookiesImpl(boolean accept); }