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/*
* 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.os.Bundle;
import android.os.Handler;
import android.os.Message;
import java.util.ListIterator;
import java.util.LinkedList;
/**
* HTTP authentication handler: local handler that takes care
* of HTTP authentication requests. This class is passed as a
* parameter to BrowserCallback.displayHttpAuthDialog and is
* meant to receive the user's response.
*/
public class HttpAuthHandler extends Handler {
/* It is important that the handler is in Network, because
* we want to share it accross multiple loaders and windows
* (like our subwindow and the main window).
*/
private static final String LOGTAG = "network";
/**
* Network.
*/
private Network mNetwork;
/**
* Loader queue.
*/
private LinkedList<LoadListener> mLoaderQueue;
// Message id for handling the user response
private final int AUTH_PROCEED = 100;
private final int AUTH_CANCEL = 200;
/**
* Creates a new HTTP authentication handler with an empty
* loader queue
*
* @param network The parent network object
*/
/* package */ HttpAuthHandler(Network network) {
mNetwork = network;
mLoaderQueue = new LinkedList<LoadListener>();
}
@Override
public void handleMessage(Message msg) {
LoadListener loader = null;
synchronized (mLoaderQueue) {
loader = mLoaderQueue.poll();
}
switch (msg.what) {
case AUTH_PROCEED:
String username = msg.getData().getString("username");
String password = msg.getData().getString("password");
loader.handleAuthResponse(username, password);
break;
case AUTH_CANCEL:
mNetwork.resetHandlersAndStopLoading(loader.getFrame());
break;
}
processNextLoader();
}
/**
* Proceed with the authorization with the given credentials
*
* @param username The username to use for authentication
* @param password The password to use for authentication
*/
public void proceed(String username, String password) {
Message msg = obtainMessage(AUTH_PROCEED);
msg.getData().putString("username", username);
msg.getData().putString("password", password);
sendMessage(msg);
}
/**
* Cancel the authorization request
*/
public void cancel() {
sendMessage(obtainMessage(AUTH_CANCEL));
}
/**
* @return True if we can use user credentials on record
* (ie, if we did not fail trying to use them last time)
*/
public boolean useHttpAuthUsernamePassword() {
LoadListener loader = null;
synchronized (mLoaderQueue) {
loader = mLoaderQueue.peek();
}
if (loader != null) {
return !loader.authCredentialsInvalid();
}
return false;
}
/**
* Resets the HTTP-authentication request handler, removes
* all loaders that share the same BrowserFrame
*
* @param frame The browser frame
*/
/* package */ void reset(BrowserFrame frame) {
synchronized (mLoaderQueue) {
ListIterator<LoadListener> i = mLoaderQueue.listIterator(0);
while (i.hasNext()) {
LoadListener loader = i.next();
if (frame == loader.getFrame()) {
i.remove();
}
}
}
}
/**
* Enqueues the loader, if the loader is the only element
* in the queue, starts processing the loader
*
* @param loader The loader that resulted in this http
* authentication request
*/
/* package */ void handleAuthRequest(LoadListener loader) {
boolean processNext = false;
synchronized (mLoaderQueue) {
mLoaderQueue.offer(loader);
processNext =
(mLoaderQueue.size() == 1);
}
if (processNext) {
processNextLoader();
}
}
/**
* Process the next loader in the queue (helper method)
*/
private void processNextLoader() {
LoadListener loader = null;
synchronized (mLoaderQueue) {
loader = mLoaderQueue.peek();
}
if (loader != null) {
CallbackProxy proxy = loader.getFrame().getCallbackProxy();
String hostname = loader.proxyAuthenticate() ?
mNetwork.getProxyHostname() : loader.host();
String realm = loader.realm();
proxy.onReceivedHttpAuthRequest(this, hostname, realm);
}
}
}
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