com.codename1.ui.html.AsyncDocumentRequestHandlerImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores
* CA 94065 USA or visit www.oracle.com if you need additional information or
* have any questions.
*/
package com.codename1.ui.html;
import com.codename1.io.ConnectionRequest;
import com.codename1.io.FileSystemStorage;
import com.codename1.io.Log;
import com.codename1.io.NetworkManager;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
/**
* Implementation of the HTML components document request handler to allow simple
* HTML support in CodenameOne.
*
* @author Shai Almog
*/
public class AsyncDocumentRequestHandlerImpl extends DefaultDocumentRequestHandler {
protected static final Object LOCK = new Object();
/**
* {@inheritDoc}
*/
public void resourceRequestedAsync(final DocumentInfo docInfo, final IOCallback callback) {
String url = docInfo.getUrl();
if(url.startsWith("jar://") || url.startsWith("res://") || url.startsWith("local://")) {
super.resourceRequestedAsync(docInfo, callback);
return;
}
visitingURL(url);
resourceRequested(docInfo, callback);
}
/**
* {@inheritDoc}
*/
public InputStream resourceRequested(DocumentInfo docInfo) {
return null;
}
private InputStream resourceRequested(final DocumentInfo docInfo, final IOCallback callback) {
try {
if(docInfo.getUrl().startsWith("file://")) {
String url = docInfo.getUrl();
// trim anchors
int hash = url.indexOf('#');
if (hash!=-1) {
url = url.substring(0,hash);
}
callback.streamReady(FileSystemStorage.getInstance().openInputStream(url), docInfo);
return null;
}
} catch (IOException ex) {
Log.e(ex);
}
final Object[] response = new Object[1];
ConnectionRequest reqest = createConnectionRequest(docInfo, callback, response);
reqest.setPost(docInfo.isPostRequest());
if(docInfo.isPostRequest()) {
reqest.setUrl(docInfo.getUrl());
reqest.setWriteRequest(true);
} else {
reqest.setUrl(docInfo.getFullUrl());
}
NetworkManager.getInstance().addToQueue(reqest);
if(callback == null) {
synchronized(LOCK) {
while(response[0] == null) {
try {
LOCK.wait(50);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
}
if(response[0] instanceof InputStream) {
return (InputStream)response[0];
}
// we need a better way to handle this...
if(response[0] instanceof Throwable) {
((Throwable)response[0]).printStackTrace();
}
}
}
return null;
}
protected ConnectionRequest createConnectionRequest(final DocumentInfo docInfo,
final IOCallback callback, final Object[] response){
return new ConnectionRequest() {
protected void buildRequestBody(OutputStream os) throws IOException {
if(isPost()) {
if(docInfo.getParams() != null){
OutputStreamWriter w = new OutputStreamWriter(os, docInfo.getEncoding());
w.write(docInfo.getParams());
}
}
}
protected void handleIOException(IOException err) {
if(callback == null) {
response[0] = err;
}
super.handleIOException(err);
}
protected boolean shouldAutoCloseResponse() {
return callback != null;
}
protected void readResponse(InputStream input) throws IOException {
if(callback != null) {
callback.streamReady(input, docInfo);
} else {
response[0] = input;
synchronized(LOCK) {
LOCK.notify();
}
}
}
};
}
}