com.sun.webkit.network.about.AboutURLConnection Maven / Gradle / Ivy
/*
* Copyright (c) 2011, 2014, 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.sun.webkit.network.about;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.ProtocolException;
import java.net.URL;
import java.net.URLConnection;
/**
* Implementation of the about: protocol handler
*/
final class AboutURLConnection extends URLConnection {
private static final String DEFAULT_CHARSET = "UTF-8";
private static final String DEFAULT_MIMETYPE = "text/html";
private final AboutRecord record;
AboutURLConnection(URL url) {
super(url);
record = new AboutRecord("");
}
@Override
public void connect() throws IOException {
if (connected) {
return;
}
connected = (record != null);
if (connected) {
record.content.reset();
return;
}
throw new ProtocolException("The URL is not valid and cannot be loaded.");
}
@Override
public InputStream getInputStream() throws IOException
{
connect();
return record.content;
}
@Override
public String getContentType()
{
try {
connect();
if (record.contentType != null) {
return record.contentType;
}
} catch (IOException ex) {
}
return DEFAULT_MIMETYPE;
}
@Override
public String getContentEncoding()
{
try {
connect();
if (record.contentEncoding != null) {
return record.contentEncoding;
}
} catch (IOException ex) {
}
return DEFAULT_CHARSET;
}
@Override
public int getContentLength()
{
try {
connect();
return record.contentLength;
} catch (IOException ex) {
//returning -1 means 'unknown length'
return -1;
}
}
private static final class AboutRecord {
private final InputStream content;
private final int contentLength;
private final String contentEncoding;
private final String contentType;
private AboutRecord(String info) {
byte[] bytes = new byte[0];
try {
bytes = info.getBytes(AboutURLConnection.DEFAULT_CHARSET);
} catch (UnsupportedEncodingException ex) {
//never happens
}
this.content = new ByteArrayInputStream(bytes);
this.contentLength = bytes.length;
this.contentEncoding = AboutURLConnection.DEFAULT_CHARSET;
this.contentType = AboutURLConnection.DEFAULT_MIMETYPE;
}
}
}