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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.coyote.http11;
import java.io.EOFException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.InetAddress;
import java.net.Socket;
import org.apache.coyote.ActionCode;
import org.apache.coyote.RequestInfo;
import org.apache.coyote.http11.filters.BufferedInputFilter;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.net.AbstractEndpoint.Handler.SocketState;
import org.apache.tomcat.util.net.JIoEndpoint;
import org.apache.tomcat.util.net.SSLSupport;
import org.apache.tomcat.util.net.SocketStatus;
import org.apache.tomcat.util.net.SocketWrapper;
/**
* Processes HTTP requests.
*
* @author Remy Maucherat
* @author fhanik
*/
public class Http11Processor extends AbstractHttp11Processor {
private static final Log log = LogFactory.getLog(Http11Processor.class);
@Override
protected Log getLog() {
return log;
}
// ------------------------------------------------------------ Constructor
public Http11Processor(int headerBufferSize, JIoEndpoint endpoint,
int maxTrailerSize) {
super(endpoint);
inputBuffer = new InternalInputBuffer(request, headerBufferSize);
request.setInputBuffer(inputBuffer);
outputBuffer = new InternalOutputBuffer(response, headerBufferSize);
response.setOutputBuffer(outputBuffer);
initializeFilters(maxTrailerSize);
}
// ----------------------------------------------------- Instance Variables
/**
* Input.
*/
protected InternalInputBuffer inputBuffer = null;
/**
* Output.
*/
protected InternalOutputBuffer outputBuffer = null;
/**
* SSL information.
*/
protected SSLSupport sslSupport;
/**
* Socket associated with the current connection.
*/
protected SocketWrapper socket;
/**
* The percentage of threads that have to be in use before keep-alive is
* disabled to aid scalability.
*/
private int disableKeepAlivePercentage = 75;
// --------------------------------------------------------- Public Methods
/**
* Set the SSL information for this HTTP connection.
*/
public void setSSLSupport(SSLSupport sslSupport) {
this.sslSupport = sslSupport;
}
public int getDisableKeepAlivePercentage() {
return disableKeepAlivePercentage;
}
public void setDisableKeepAlivePercentage(int disableKeepAlivePercentage) {
this.disableKeepAlivePercentage = disableKeepAlivePercentage;
}
/**
* Process pipelined HTTP requests on the specified socket.
*
* @param socketWrapper Socket from which the HTTP requests will be read
* and the HTTP responses will be written.
*
* @throws IOException error during an I/O operation
*/
@Override
public SocketState process(SocketWrapper socketWrapper)
throws IOException {
RequestInfo rp = request.getRequestProcessor();
rp.setStage(org.apache.coyote.Constants.STAGE_PARSE);
// Setting up the I/O
this.socket = socketWrapper;
inputBuffer.setInputStream(socket.getSocket().getInputStream());
outputBuffer.setOutputStream(socket.getSocket().getOutputStream());
// Error flag
error = false;
keepAlive = true;
if (maxKeepAliveRequests > 0) {
socketWrapper.decrementKeepAlive();
}
int soTimeout = endpoint.getSoTimeout();
int threadRatio = -1;
// These may return zero or negative values
// Only calculate a thread ratio when both are >0 to ensure we get a
// sensible result
if (endpoint.getCurrentThreadsBusy() >0 &&
endpoint.getMaxThreads() >0) {
threadRatio = (endpoint.getCurrentThreadsBusy() * 100)
/ endpoint.getMaxThreads();
}
// Disable keep-alive if we are running low on threads
if (threadRatio > getDisableKeepAlivePercentage()) {
socketWrapper.setKeepAliveLeft(0);
}
try {
socket.getSocket().setSoTimeout(soTimeout);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.debug(sm.getString("http11processor.socket.timeout"), t);
error = true;
}
boolean keptAlive = socketWrapper.isKeptAlive();
while (!error && keepAlive && !endpoint.isPaused()) {
// Parsing the request header
try {
int standardTimeout = 0;
if (keptAlive) {
if (keepAliveTimeout > 0) {
standardTimeout = keepAliveTimeout;
} else if (soTimeout > 0) {
standardTimeout = soTimeout;
}
}
/*
* When there is no data in the buffer and this is not the first
* request on this connection and timeouts are being used the
* first read for this request may need a different timeout to
* take account of time spent waiting for a processing thread.
*
* This is a little hacky but better than exposing the socket
* and the timeout info to the InputBuffer
*/
if (inputBuffer.lastValid == 0 &&
socketWrapper.getLastAccess() > -1 &&
standardTimeout > 0) {
long queueTime = System.currentTimeMillis() -
socketWrapper.getLastAccess();
int firstReadTimeout;
if (queueTime >= standardTimeout) {
// Queued for longer than timeout but there might be
// data so use shortest possible timeout
firstReadTimeout = 1;
} else {
// Cast is safe since queueTime must be less than
// standardTimeout which is an int
firstReadTimeout = standardTimeout - (int) queueTime;
}
socket.getSocket().setSoTimeout(firstReadTimeout);
if (!inputBuffer.fill()) {
throw new EOFException(sm.getString("iib.eof.error"));
}
}
if (standardTimeout > 0) {
socket.getSocket().setSoTimeout(standardTimeout);
}
inputBuffer.parseRequestLine(false);
if (endpoint.isPaused()) {
// 503 - Service unavailable
response.setStatus(503);
adapter.log(request, response, 0);
error = true;
} else {
request.setStartTime(System.currentTimeMillis());
keptAlive = true;
if (disableUploadTimeout) {
socket.getSocket().setSoTimeout(soTimeout);
} else {
socket.getSocket().setSoTimeout(connectionUploadTimeout);
}
inputBuffer.parseHeaders();
}
} catch (IOException e) {
error = true;
break;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
if (log.isDebugEnabled()) {
log.debug(sm.getString("http11processor.header.parse"), t);
}
// 400 - Bad Request
response.setStatus(400);
adapter.log(request, response, 0);
error = true;
}
if (!error) {
// Setting up filters, and parse some request headers
rp.setStage(org.apache.coyote.Constants.STAGE_PREPARE);
try {
prepareRequest();
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
if (log.isDebugEnabled()) {
log.debug(sm.getString("http11processor.request.prepare"), t);
}
// 400 - Internal Server Error
response.setStatus(400);
adapter.log(request, response, 0);
error = true;
}
}
if (socketWrapper.getKeepAliveLeft() == 0) {
keepAlive = false;
}
// Process the request in the adapter
if (!error) {
try {
rp.setStage(org.apache.coyote.Constants.STAGE_SERVICE);
adapter.service(request, response);
// Handle when the response was committed before a serious
// error occurred. Throwing a ServletException should both
// set the status to 500 and set the errorException.
// If we fail here, then the response is likely already
// committed, so we can't try and set headers.
if(keepAlive && !error) { // Avoid checking twice.
error = response.getErrorException() != null ||
(!isAsync() &&
statusDropsConnection(response.getStatus()));
}
} catch (InterruptedIOException e) {
error = true;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("http11processor.request.process"), t);
// 500 - Internal Server Error
response.setStatus(500);
adapter.log(request, response, 0);
error = true;
}
}
// Finish the handling of the request
try {
rp.setStage(org.apache.coyote.Constants.STAGE_ENDINPUT);
// If we know we are closing the connection, don't drain input.
// This way uploading a 100GB file doesn't tie up the thread
// if the servlet has rejected it.
if(error && !isAsync())
inputBuffer.setSwallowInput(false);
if (!isAsync())
endRequest();
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("http11processor.request.finish"), t);
// 500 - Internal Server Error
response.setStatus(500);
adapter.log(request, response, 0);
error = true;
}
try {
rp.setStage(org.apache.coyote.Constants.STAGE_ENDOUTPUT);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("http11processor.response.finish"), t);
error = true;
}
// If there was an error, make sure the request is counted as
// and error, and update the statistics counter
if (error) {
response.setStatus(500);
}
request.updateCounters();
rp.setStage(org.apache.coyote.Constants.STAGE_KEEPALIVE);
// Don't reset the param - we'll see it as ended. Next request
// will reset it
// thrA.setParam(null);
// Next request
if (!isAsync() || error) {
inputBuffer.nextRequest();
outputBuffer.nextRequest();
}
// If we don't have a pipe-lined request allow this thread to be
// used by another connection
if (isAsync() || error || inputBuffer.lastValid == 0) {
break;
}
if (maxKeepAliveRequests > 0) {
socketWrapper.decrementKeepAlive();
}
}
rp.setStage(org.apache.coyote.Constants.STAGE_ENDED);
if (error || endpoint.isPaused()) {
return SocketState.CLOSED;
} else if (isAsync()) {
return SocketState.LONG;
} else {
if (!keepAlive) {
return SocketState.CLOSED;
} else {
return SocketState.OPEN;
}
}
}
@Override
protected void resetTimeouts() {
// NOOP for APR
}
@Override
protected void recycleInternal() {
// Recycle
this.socket = null;
// Recycle ssl info
sslSupport = null;
}
@Override
public SocketState event(SocketStatus status) throws IOException {
// Should never reach this code but in case we do...
throw new IOException(
sm.getString("http11processor.comet.notsupported"));
}
// ----------------------------------------------------- ActionHook Methods
/**
* Send an action to the connector.
*
* @param actionCode Type of the action
* @param param Action parameter
*/
@Override
public void actionInternal(ActionCode actionCode, Object param) {
if (actionCode == ActionCode.CLOSE) {
// Close
// End the processing of the current request, and stop any further
// transactions with the client
try {
outputBuffer.endRequest();
} catch (IOException e) {
// Set error flag
error = true;
}
} else if (actionCode == ActionCode.REQ_SSL_ATTRIBUTE ) {
try {
if (sslSupport != null) {
Object sslO = sslSupport.getCipherSuite();
if (sslO != null)
request.setAttribute
(SSLSupport.CIPHER_SUITE_KEY, sslO);
sslO = sslSupport.getPeerCertificateChain(false);
if (sslO != null)
request.setAttribute
(SSLSupport.CERTIFICATE_KEY, sslO);
sslO = sslSupport.getKeySize();
if (sslO != null)
request.setAttribute
(SSLSupport.KEY_SIZE_KEY, sslO);
sslO = sslSupport.getSessionId();
if (sslO != null)
request.setAttribute
(SSLSupport.SESSION_ID_KEY, sslO);
request.setAttribute(SSLSupport.SESSION_MGR, sslSupport);
}
} catch (Exception e) {
log.warn(sm.getString("http11processor.socket.ssl"), e);
}
} else if (actionCode == ActionCode.REQ_HOST_ADDR_ATTRIBUTE) {
if ((remoteAddr == null) && (socket != null)) {
InetAddress inetAddr = socket.getSocket().getInetAddress();
if (inetAddr != null) {
remoteAddr = inetAddr.getHostAddress();
}
}
request.remoteAddr().setString(remoteAddr);
} else if (actionCode == ActionCode.REQ_LOCAL_NAME_ATTRIBUTE) {
if ((localName == null) && (socket != null)) {
InetAddress inetAddr = socket.getSocket().getLocalAddress();
if (inetAddr != null) {
localName = inetAddr.getHostName();
}
}
request.localName().setString(localName);
} else if (actionCode == ActionCode.REQ_HOST_ATTRIBUTE) {
if ((remoteHost == null) && (socket != null)) {
InetAddress inetAddr = socket.getSocket().getInetAddress();
if (inetAddr != null) {
remoteHost = inetAddr.getHostName();
}
if(remoteHost == null) {
if(remoteAddr != null) {
remoteHost = remoteAddr;
} else { // all we can do is punt
request.remoteHost().recycle();
}
}
}
request.remoteHost().setString(remoteHost);
} else if (actionCode == ActionCode.REQ_LOCAL_ADDR_ATTRIBUTE) {
if (localAddr == null)
localAddr = socket.getSocket().getLocalAddress().getHostAddress();
request.localAddr().setString(localAddr);
} else if (actionCode == ActionCode.REQ_REMOTEPORT_ATTRIBUTE) {
if ((remotePort == -1 ) && (socket !=null)) {
remotePort = socket.getSocket().getPort();
}
request.setRemotePort(remotePort);
} else if (actionCode == ActionCode.REQ_LOCALPORT_ATTRIBUTE) {
if ((localPort == -1 ) && (socket !=null)) {
localPort = socket.getSocket().getLocalPort();
}
request.setLocalPort(localPort);
} else if (actionCode == ActionCode.REQ_SSL_CERTIFICATE) {
if( sslSupport != null) {
/*
* Consume and buffer the request body, so that it does not
* interfere with the client's handshake messages
*/
InputFilter[] inputFilters = inputBuffer.getFilters();
((BufferedInputFilter) inputFilters[Constants.BUFFERED_FILTER])
.setLimit(maxSavePostSize);
inputBuffer.addActiveFilter
(inputFilters[Constants.BUFFERED_FILTER]);
try {
Object sslO = sslSupport.getPeerCertificateChain(true);
if( sslO != null) {
request.setAttribute
(SSLSupport.CERTIFICATE_KEY, sslO);
}
} catch (Exception e) {
log.warn(sm.getString("http11processor.socket.ssl"), e);
}
}
} else if (actionCode == ActionCode.ASYNC_COMPLETE) {
if (asyncStateMachine.asyncComplete()) {
((JIoEndpoint) endpoint).processSocketAsync(this.socket,
SocketStatus.OPEN);
}
} else if (actionCode == ActionCode.ASYNC_SETTIMEOUT) {
if (param == null) return;
long timeout = ((Long)param).longValue();
// if we are not piggy backing on a worker thread, set the timeout
socket.setTimeout(timeout);
} else if (actionCode == ActionCode.ASYNC_DISPATCH) {
if (asyncStateMachine.asyncDispatch()) {
((JIoEndpoint) endpoint).processSocketAsync(this.socket,
SocketStatus.OPEN);
}
}
}
// ------------------------------------------------------ Protected Methods
@Override
protected void prepareRequestInternal() {
// NOOP for BIO
}
@Override
protected boolean prepareSendfile(OutputFilter[] outputFilters) {
// Should never, ever call this code
Exception e = new Exception();
log.error(sm.getString("http11processor.neverused"), e);
return false;
}
@Override
protected AbstractInputBuffer getInputBuffer() {
return inputBuffer;
}
@Override
protected AbstractOutputBuffer getOutputBuffer() {
return outputBuffer;
}
/**
* Set the socket buffer flag.
*/
@Override
public void setSocketBuffer(int socketBuffer) {
super.setSocketBuffer(socketBuffer);
outputBuffer.setSocketBuffer(socketBuffer);
}
}
