org.apache.coyote.http11.InternalAprOutputBuffer Maven / Gradle / Ivy
/*
* 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.coyote.http11;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.apache.coyote.ActionCode;
import org.apache.coyote.OutputBuffer;
import org.apache.coyote.Response;
import org.apache.tomcat.jni.Socket;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.http.HttpMessages;
/**
* Output buffer.
*
* @author Remy Maucherat
*/
public class InternalAprOutputBuffer extends AbstractOutputBuffer {
// ----------------------------------------------------------- Constructors
/**
* Default constructor.
*/
public InternalAprOutputBuffer(Response response, int headerBufferSize) {
this.response = response;
buf = new byte[headerBufferSize];
if (headerBufferSize < (8 * 1024)) {
bbuf = ByteBuffer.allocateDirect(6 * 1500);
} else {
bbuf = ByteBuffer.allocateDirect((headerBufferSize / 1500 + 1) * 1500);
}
outputStreamOutputBuffer = new SocketOutputBuffer();
filterLibrary = new OutputFilter[0];
activeFilters = new OutputFilter[0];
lastActiveFilter = -1;
committed = false;
finished = false;
// Cause loading of HttpMessages
HttpMessages.getMessage(200);
}
// ----------------------------------------------------- Instance Variables
/**
* Underlying socket.
*/
protected long socket;
/**
* Direct byte buffer used for writing.
*/
protected ByteBuffer bbuf = null;
// ------------------------------------------------------------- Properties
/**
* Set the underlying socket.
*/
public void setSocket(long socket) {
this.socket = socket;
Socket.setsbb(this.socket, bbuf);
}
// --------------------------------------------------------- Public Methods
/**
* Flush the response.
*
* @throws IOException an underlying I/O error occurred
*/
@Override
public void flush()
throws IOException {
super.flush();
// Flush the current buffer
flushBuffer();
}
/**
* Recycle the output buffer. This should be called when closing the
* connection.
*/
@Override
public void recycle() {
super.recycle();
bbuf.clear();
}
/**
* End request.
*
* @throws IOException an underlying I/O error occurred
*/
@Override
public void endRequest()
throws IOException {
if (!committed) {
// Send the connector a request for commit. The connector should
// then validate the headers, send them (using sendHeader) and
// set the filters accordingly.
response.action(ActionCode.COMMIT, null);
}
if (finished)
return;
if (lastActiveFilter != -1)
activeFilters[lastActiveFilter].end();
flushBuffer();
finished = true;
}
// ------------------------------------------------ HTTP/1.1 Output Methods
/**
* Send an acknowledgment.
*/
@Override
public void sendAck()
throws IOException {
if (!committed) {
if (Socket.send(socket, Constants.ACK_BYTES, 0, Constants.ACK_BYTES.length) < 0)
throw new IOException(sm.getString("iib.failedwrite"));
}
}
// ------------------------------------------------------ Protected Methods
/**
* Commit the response.
*
* @throws IOException an underlying I/O error occurred
*/
@Override
protected void commit() throws IOException {
// The response is now committed
committed = true;
response.setCommitted(true);
if (pos > 0) {
// Sending the response header buffer
bbuf.put(buf, 0, pos);
}
}
/**
* Callback to write data from the buffer.
*/
protected void flushBuffer()
throws IOException {
if (bbuf.position() > 0) {
if (Socket.sendbb(socket, 0, bbuf.position()) < 0) {
throw new IOException();
}
bbuf.clear();
}
}
// ----------------------------------- OutputStreamOutputBuffer Inner Class
/**
* This class is an output buffer which will write data to an output
* stream.
*/
protected class SocketOutputBuffer implements OutputBuffer {
/**
* Write chunk.
*/
@Override
public int doWrite(ByteChunk chunk, Response res)
throws IOException {
int len = chunk.getLength();
int start = chunk.getStart();
byte[] b = chunk.getBuffer();
while (len > 0) {
int thisTime = len;
if (bbuf.position() == bbuf.capacity()) {
flushBuffer();
}
if (thisTime > bbuf.capacity() - bbuf.position()) {
thisTime = bbuf.capacity() - bbuf.position();
}
bbuf.put(b, start, thisTime);
len = len - thisTime;
start = start + thisTime;
}
byteCount += chunk.getLength();
return chunk.getLength();
}
@Override
public long getBytesWritten() {
return byteCount;
}
}
}