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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.tomcat.websocket;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.CompletionHandler;
import javax.websocket.CloseReason;
import javax.websocket.CloseReason.CloseCodes;
public class WsFrameClient extends WsFrameBase {
private final AsyncChannelWrapper channel;
private final CompletionHandler<Integer,Void> handler;
// Not final as it may need to be re-sized
private ByteBuffer response;
public WsFrameClient(ByteBuffer response, AsyncChannelWrapper channel,
WsSession wsSession) {
// TODO Add support for extensions to the client side code
super(wsSession, null);
this.response = response;
this.channel = channel;
this.handler = new WsFrameClientCompletionHandler();
}
void startInputProcessing() {
try {
processSocketRead();
} catch (IOException e) {
close(e);
}
}
private void processSocketRead() throws IOException {
while (response.hasRemaining()) {
int remaining = response.remaining();
int toCopy = Math.min(remaining, inputBuffer.length - writePos);
// Copy remaining bytes read in HTTP phase to input buffer used by
// frame processing
response.get(inputBuffer, writePos, toCopy);
writePos += toCopy;
// Process the data we have
processInputBuffer();
}
response.clear();
// Get some more data
if (isOpen()) {
channel.read(response, null, handler);
}
}
private final void close(Throwable t) {
CloseReason cr;
if (t instanceof WsIOException) {
cr = ((WsIOException) t).getCloseReason();
} else {
cr = new CloseReason(
CloseCodes.CLOSED_ABNORMALLY, t.getMessage());
}
try {
wsSession.close(cr);
} catch (IOException ignore) {
// Ignore
}
}
@Override
protected boolean isMasked() {
// Data is from the server so it is not masked
return false;
}
private class WsFrameClientCompletionHandler
implements CompletionHandler<Integer,Void> {
@Override
public void completed(Integer result, Void attachment) {
response.flip();
try {
processSocketRead();
} catch (IOException e) {
// Only send a close message on an IOException if the client
// has not yet received a close control message from the server
// as the IOException may be in response to the client
// continuing to send a message after the server sent a close
// control message.
if (isOpen()) {
close(e);
}
}
}
@Override
public void failed(Throwable exc, Void attachment) {
if (exc instanceof ReadBufferOverflowException) {
// response will be empty if this exception is thrown
response = ByteBuffer.allocate(
((ReadBufferOverflowException) exc).getMinBufferSize());
response.flip();
try {
processSocketRead();
} catch (IOException e) {
close(e);
}
} else {
close(exc);
}
}
}
}
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