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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.IOException;
import java.io.InterruptedIOException;
import java.util.Locale;
import java.util.StringTokenizer;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.regex.Pattern;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpUpgradeHandler;
import org.apache.coyote.AbstractProcessor;
import org.apache.coyote.ActionCode;
import org.apache.coyote.AsyncContextCallback;
import org.apache.coyote.RequestInfo;
import org.apache.coyote.http11.filters.BufferedInputFilter;
import org.apache.coyote.http11.filters.ChunkedInputFilter;
import org.apache.coyote.http11.filters.ChunkedOutputFilter;
import org.apache.coyote.http11.filters.GzipOutputFilter;
import org.apache.coyote.http11.filters.IdentityInputFilter;
import org.apache.coyote.http11.filters.IdentityOutputFilter;
import org.apache.coyote.http11.filters.SavedRequestInputFilter;
import org.apache.coyote.http11.filters.VoidInputFilter;
import org.apache.coyote.http11.filters.VoidOutputFilter;
import org.apache.juli.logging.Log;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.buf.Ascii;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.HexUtils;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.FastHttpDateFormat;
import org.apache.tomcat.util.http.MimeHeaders;
import org.apache.tomcat.util.log.UserDataHelper;
import org.apache.tomcat.util.net.AbstractEndpoint;
import org.apache.tomcat.util.net.AbstractEndpoint.Handler.SocketState;
import org.apache.tomcat.util.net.DispatchType;
import org.apache.tomcat.util.net.SocketStatus;
import org.apache.tomcat.util.net.SocketWrapper;
import org.apache.tomcat.util.res.StringManager;
public abstract class AbstractHttp11Processor extends AbstractProcessor {
protected abstract Log getLog();
private final UserDataHelper userDataHelper;
/**
* The string manager for this package.
*/
protected static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* Input.
*/
protected AbstractInputBuffer inputBuffer ;
/**
* Output.
*/
protected AbstractOutputBuffer outputBuffer;
/*
* Tracks how many internal filters are in the filter library so they
* are skipped when looking for pluggable filters.
*/
private int pluggableFilterIndex = Integer.MAX_VALUE;
/**
* Error flag.
*/
protected boolean error = false;
/**
* Keep-alive.
*/
protected boolean keepAlive = true;
/**
* Flag used to indicate that the socket should be kept open (e.g. for keep
* alive or send file.
*/
protected boolean openSocket = false;
/**
* Flag used to indicate that the socket should treat the next request
* processed like a keep-alive connection - i.e. one where there may not be
* any data to process. The initial value of this flag on entering the
* process method is different for connectors that use polling (NIO / APR -
* data is always expected) compared to those that use blocking (BIO - data
* is only expected if the connection isn't in the keep-alive state).
*/
protected boolean keptAlive;
/**
* Flag that indicates that send file processing is in progress and that the
* socket should not be returned to the poller (where a poller is used).
*/
protected boolean sendfileInProgress = false;
/**
* Flag that indicates if the request headers have been completely read.
*/
protected boolean readComplete = true;
/**
* HTTP/1.1 flag.
*/
protected boolean http11 = true;
/**
* HTTP/0.9 flag.
*/
protected boolean http09 = false;
/**
* Content delimiter for the request (if false, the connection will
* be closed at the end of the request).
*/
protected boolean contentDelimitation = true;
/**
* Is there an expectation ?
*/
protected boolean expectation = false;
/**
* Comet used.
*/
protected boolean comet = false;
/**
* Regular expression that defines the restricted user agents.
*/
protected Pattern restrictedUserAgents = null;
/**
* Maximum number of Keep-Alive requests to honor.
*/
protected int maxKeepAliveRequests = -1;
/**
* The number of seconds Tomcat will wait for a subsequent request
* before closing the connection.
*/
protected int keepAliveTimeout = -1;
/**
* Maximum timeout on uploads. 5 minutes as in Apache HTTPD server.
*/
protected int connectionUploadTimeout = 300000;
/**
* Flag to disable setting a different time-out on uploads.
*/
protected boolean disableUploadTimeout = false;
/**
* Allowed compression level.
*/
protected int compressionLevel = 0;
/**
* Minimum content size to make compression.
*/
protected int compressionMinSize = 2048;
/**
* Max saved post size.
*/
protected int maxSavePostSize = 4 * 1024;
/**
* Regular expression that defines the user agents to not use gzip with
*/
protected Pattern noCompressionUserAgents = null;
/**
* List of MIMES which could be gzipped
*/
protected String[] compressableMimeTypes =
{ "text/html", "text/xml", "text/plain" };
/**
* Host name (used to avoid useless B2C conversion on the host name).
*/
protected char[] hostNameC = new char[0];
/**
* Allow a customized the server header for the tin-foil hat folks.
*/
protected String server = null;
/**
* Instance of the new protocol to use after the HTTP connection has been
* upgraded.
*/
protected HttpUpgradeHandler httpUpgradeHandler = null;
public AbstractHttp11Processor(AbstractEndpoint endpoint) {
super(endpoint);
userDataHelper = new UserDataHelper(getLog());
}
/**
* Set compression level.
*/
public void setCompression(String compression) {
if (compression.equals("on")) {
this.compressionLevel = 1;
} else if (compression.equals("force")) {
this.compressionLevel = 2;
} else if (compression.equals("off")) {
this.compressionLevel = 0;
} else {
try {
// Try to parse compression as an int, which would give the
// minimum compression size
compressionMinSize = Integer.parseInt(compression);
this.compressionLevel = 1;
} catch (Exception e) {
this.compressionLevel = 0;
}
}
}
/**
* Set Minimum size to trigger compression.
*/
public void setCompressionMinSize(int compressionMinSize) {
this.compressionMinSize = compressionMinSize;
}
/**
* Set no compression user agent pattern. Regular expression as supported
* by {@link Pattern}.
*
* ie: "gorilla|desesplorer|tigrus"
*/
public void setNoCompressionUserAgents(String noCompressionUserAgents) {
if (noCompressionUserAgents == null || noCompressionUserAgents.length() == 0) {
this.noCompressionUserAgents = null;
} else {
this.noCompressionUserAgents =
Pattern.compile(noCompressionUserAgents);
}
}
/**
* Add a mime-type which will be compressible
* The mime-type String will be exactly matched
* in the response mime-type header .
*
* @param mimeType mime-type string
*/
public void addCompressableMimeType(String mimeType) {
compressableMimeTypes =
addStringArray(compressableMimeTypes, mimeType);
}
/**
* Set compressible mime-type list (this method is best when used with
* a large number of connectors, where it would be better to have all of
* them referenced a single array).
*/
public void setCompressableMimeTypes(String[] compressableMimeTypes) {
this.compressableMimeTypes = compressableMimeTypes;
}
/**
* Set compressable mime-type list
* List contains users agents separated by ',' :
*
* ie: "text/html,text/xml,text/plain"
*/
public void setCompressableMimeTypes(String compressableMimeTypes) {
if (compressableMimeTypes != null) {
this.compressableMimeTypes = null;
StringTokenizer st = new StringTokenizer(compressableMimeTypes, ",");
while (st.hasMoreTokens()) {
addCompressableMimeType(st.nextToken().trim());
}
}
}
/**
* Return compression level.
*/
public String getCompression() {
switch (compressionLevel) {
case 0:
return "off";
case 1:
return "on";
case 2:
return "force";
}
return "off";
}
/**
* General use method
*
* @param sArray the StringArray
* @param value string
*/
private String[] addStringArray(String sArray[], String value) {
String[] result = null;
if (sArray == null) {
result = new String[1];
result[0] = value;
}
else {
result = new String[sArray.length + 1];
for (int i = 0; i < sArray.length; i++) {
result[i] = sArray[i];
}
result[sArray.length] = value;
}
return result;
}
/**
* Checks if any entry in the string array starts with the specified value
*
* @param sArray the StringArray
* @param value string
*/
private boolean startsWithStringArray(String sArray[], String value) {
if (value == null) {
return false;
}
for (int i = 0; i < sArray.length; i++) {
if (value.startsWith(sArray[i])) {
return true;
}
}
return false;
}
/**
* Set restricted user agent list (which will downgrade the connector
* to HTTP/1.0 mode). Regular expression as supported by {@link Pattern}.
*
* ie: "gorilla|desesplorer|tigrus"
*/
public void setRestrictedUserAgents(String restrictedUserAgents) {
if (restrictedUserAgents == null ||
restrictedUserAgents.length() == 0) {
this.restrictedUserAgents = null;
} else {
this.restrictedUserAgents = Pattern.compile(restrictedUserAgents);
}
}
/**
* Set the maximum number of Keep-Alive requests to honor.
* This is to safeguard from DoS attacks. Setting to a negative
* value disables the check.
*/
public void setMaxKeepAliveRequests(int mkar) {
maxKeepAliveRequests = mkar;
}
/**
* Return the number of Keep-Alive requests that we will honor.
*/
public int getMaxKeepAliveRequests() {
return maxKeepAliveRequests;
}
/**
* Set the Keep-Alive timeout.
*/
public void setKeepAliveTimeout(int timeout) {
keepAliveTimeout = timeout;
}
/**
* Return the number Keep-Alive timeout.
*/
public int getKeepAliveTimeout() {
return keepAliveTimeout;
}
/**
* Set the maximum size of a POST which will be buffered in SSL mode.
*/
public void setMaxSavePostSize(int msps) {
maxSavePostSize = msps;
}
/**
* Return the maximum size of a POST which will be buffered in SSL mode.
*/
public int getMaxSavePostSize() {
return maxSavePostSize;
}
/**
* Set the flag to control upload time-outs.
*/
public void setDisableUploadTimeout(boolean isDisabled) {
disableUploadTimeout = isDisabled;
}
/**
* Get the flag that controls upload time-outs.
*/
public boolean getDisableUploadTimeout() {
return disableUploadTimeout;
}
/**
* Set the socket buffer flag.
*/
public void setSocketBuffer(int socketBuffer) {
outputBuffer.setSocketBuffer(socketBuffer);
}
/**
* Get the socket buffer flag.
*/
public int getSocketBuffer() {
return outputBuffer.getSocketBuffer();
}
/**
* Set the upload timeout.
*/
public void setConnectionUploadTimeout(int timeout) {
connectionUploadTimeout = timeout ;
}
/**
* Get the upload timeout.
*/
public int getConnectionUploadTimeout() {
return connectionUploadTimeout;
}
/**
* Set the server header name.
*/
public void setServer( String server ) {
if (server==null || server.equals("")) {
this.server = null;
} else {
this.server = server;
}
}
/**
* Get the server header name.
*/
public String getServer() {
return server;
}
/**
* Check if the resource could be compressed, if the client supports it.
*/
private boolean isCompressable() {
// Check if content is not already gzipped
MessageBytes contentEncodingMB =
response.getMimeHeaders().getValue("Content-Encoding");
if ((contentEncodingMB != null)
&& (contentEncodingMB.indexOf("gzip") != -1)) {
return false;
}
// If force mode, always compress (test purposes only)
if (compressionLevel == 2) {
return true;
}
// Check if sufficient length to trigger the compression
long contentLength = response.getContentLengthLong();
if ((contentLength == -1)
|| (contentLength > compressionMinSize)) {
// Check for compatible MIME-TYPE
if (compressableMimeTypes != null) {
return (startsWithStringArray(compressableMimeTypes,
response.getContentType()));
}
}
return false;
}
/**
* Check if compression should be used for this resource. Already checked
* that the resource could be compressed if the client supports it.
*/
private boolean useCompression() {
// Check if browser support gzip encoding
MessageBytes acceptEncodingMB =
request.getMimeHeaders().getValue("accept-encoding");
if ((acceptEncodingMB == null)
|| (acceptEncodingMB.indexOf("gzip") == -1)) {
return false;
}
// If force mode, always compress (test purposes only)
if (compressionLevel == 2) {
return true;
}
// Check for incompatible Browser
if (noCompressionUserAgents != null) {
MessageBytes userAgentValueMB =
request.getMimeHeaders().getValue("user-agent");
if(userAgentValueMB != null) {
String userAgentValue = userAgentValueMB.toString();
if (noCompressionUserAgents != null &&
noCompressionUserAgents.matcher(userAgentValue).matches()) {
return false;
}
}
}
return true;
}
/**
* Specialized utility method: find a sequence of lower case bytes inside
* a ByteChunk.
*/
protected int findBytes(ByteChunk bc, byte[] b) {
byte first = b[0];
byte[] buff = bc.getBuffer();
int start = bc.getStart();
int end = bc.getEnd();
// Look for first char
int srcEnd = b.length;
for (int i = start; i <= (end - srcEnd); i++) {
if (Ascii.toLower(buff[i]) != first) {
continue;
}
// found first char, now look for a match
int myPos = i+1;
for (int srcPos = 1; srcPos < srcEnd;) {
if (Ascii.toLower(buff[myPos++]) != b[srcPos++]) {
break;
}
if (srcPos == srcEnd) {
return i - start; // found it
}
}
}
return -1;
}
/**
* Determine if we must drop the connection because of the HTTP status
* code. Use the same list of codes as Apache/httpd.
*/
protected boolean statusDropsConnection(int status) {
return status == 400 /* SC_BAD_REQUEST */ ||
status == 408 /* SC_REQUEST_TIMEOUT */ ||
status == 411 /* SC_LENGTH_REQUIRED */ ||
status == 413 /* SC_REQUEST_ENTITY_TOO_LARGE */ ||
status == 414 /* SC_REQUEST_URI_TOO_LONG */ ||
status == 500 /* SC_INTERNAL_SERVER_ERROR */ ||
status == 503 /* SC_SERVICE_UNAVAILABLE */ ||
status == 501 /* SC_NOT_IMPLEMENTED */;
}
/**
* Exposes input buffer to super class to allow better code re-use.
* @return The input buffer used by the processor.
*/
protected abstract AbstractInputBuffer getInputBuffer();
/**
* Exposes output buffer to super class to allow better code re-use.
* @return The output buffer used by the processor.
*/
protected abstract AbstractOutputBuffer getOutputBuffer();
/**
* Initialize standard input and output filters.
*/
protected void initializeFilters(int maxTrailerSize, int maxExtensionSize) {
// Create and add the identity filters.
getInputBuffer().addFilter(new IdentityInputFilter());
getOutputBuffer().addFilter(new IdentityOutputFilter());
// Create and add the chunked filters.
getInputBuffer().addFilter(
new ChunkedInputFilter(maxTrailerSize, maxExtensionSize));
getOutputBuffer().addFilter(new ChunkedOutputFilter());
// Create and add the void filters.
getInputBuffer().addFilter(new VoidInputFilter());
getOutputBuffer().addFilter(new VoidOutputFilter());
// Create and add buffered input filter
getInputBuffer().addFilter(new BufferedInputFilter());
// Create and add the chunked filters.
//getInputBuffer().addFilter(new GzipInputFilter());
getOutputBuffer().addFilter(new GzipOutputFilter());
pluggableFilterIndex = getInputBuffer().getFilters().length;
}
/**
* Add an input filter to the current request.
*
* @return false if the encoding was not found (which would mean it is
* unsupported)
*/
protected boolean addInputFilter(InputFilter[] inputFilters,
String encodingName) {
if (encodingName.equals("identity")) {
// Skip
} else if (encodingName.equals("chunked")) {
getInputBuffer().addActiveFilter
(inputFilters[Constants.CHUNKED_FILTER]);
contentDelimitation = true;
} else {
for (int i = pluggableFilterIndex; i < inputFilters.length; i++) {
if (inputFilters[i].getEncodingName()
.toString().equals(encodingName)) {
getInputBuffer().addActiveFilter(inputFilters[i]);
return true;
}
}
return false;
}
return true;
}
/**
* Send an action to the connector.
*
* @param actionCode Type of the action
* @param param Action parameter
*/
@Override
public final void action(ActionCode actionCode, Object param) {
if (actionCode == ActionCode.CLOSE) {
// End the processing of the current request
try {
getOutputBuffer().endRequest();
} catch (IOException e) {
// Set error flag
error = true;
}
} else if (actionCode == ActionCode.COMMIT) {
// Commit current response
if (response.isCommitted()) {
return;
}
// Validate and write response headers
try {
prepareResponse();
getOutputBuffer().commit();
} catch (IOException e) {
// Set error flag
error = true;
}
} else if (actionCode == ActionCode.ACK) {
// Acknowledge request
// Send a 100 status back if it makes sense (response not committed
// yet, and client specified an expectation for 100-continue)
if ((response.isCommitted()) || !expectation) {
return;
}
getInputBuffer().setSwallowInput(true);
try {
getOutputBuffer().sendAck();
} catch (IOException e) {
// Set error flag
error = true;
}
} else if (actionCode == ActionCode.CLIENT_FLUSH) {
try {
getOutputBuffer().flush();
} catch (IOException e) {
// Set error flag
error = true;
response.setErrorException(e);
}
} else if (actionCode == ActionCode.IS_ERROR) {
((AtomicBoolean) param).set(error);
} else if (actionCode == ActionCode.DISABLE_SWALLOW_INPUT) {
// Do not swallow request input but
// make sure we are closing the connection
error = true;
getInputBuffer().setSwallowInput(false);
} else if (actionCode == ActionCode.RESET) {
// Reset response
// Note: This must be called before the response is committed
getOutputBuffer().reset();
} else if (actionCode == ActionCode.REQ_SET_BODY_REPLAY) {
ByteChunk body = (ByteChunk) param;
InputFilter savedBody = new SavedRequestInputFilter(body);
savedBody.setRequest(request);
@SuppressWarnings("unchecked")
AbstractInputBuffer internalBuffer = (AbstractInputBuffer)
request.getInputBuffer();
internalBuffer.addActiveFilter(savedBody);
} else if (actionCode == ActionCode.ASYNC_START) {
asyncStateMachine.asyncStart((AsyncContextCallback) param);
} else if (actionCode == ActionCode.ASYNC_DISPATCHED) {
asyncStateMachine.asyncDispatched();
} else if (actionCode == ActionCode.ASYNC_TIMEOUT) {
AtomicBoolean result = (AtomicBoolean) param;
result.set(asyncStateMachine.asyncTimeout());
} else if (actionCode == ActionCode.ASYNC_RUN) {
asyncStateMachine.asyncRun((Runnable) param);
} else if (actionCode == ActionCode.ASYNC_ERROR) {
asyncStateMachine.asyncError();
} else if (actionCode == ActionCode.ASYNC_IS_STARTED) {
((AtomicBoolean) param).set(asyncStateMachine.isAsyncStarted());
} else if (actionCode == ActionCode.ASYNC_IS_DISPATCHING) {
((AtomicBoolean) param).set(asyncStateMachine.isAsyncDispatching());
} else if (actionCode == ActionCode.ASYNC_IS_ASYNC) {
((AtomicBoolean) param).set(asyncStateMachine.isAsync());
} else if (actionCode == ActionCode.ASYNC_IS_TIMINGOUT) {
((AtomicBoolean) param).set(asyncStateMachine.isAsyncTimingOut());
} else if (actionCode == ActionCode.ASYNC_IS_ERROR) {
((AtomicBoolean) param).set(asyncStateMachine.isAsyncError());
} else if (actionCode == ActionCode.UPGRADE) {
httpUpgradeHandler = (HttpUpgradeHandler) param;
// Stop further HTTP output
getOutputBuffer().finished = true;
} else if (actionCode == ActionCode.AVAILABLE) {
request.setAvailable(inputBuffer.available());
} else if (actionCode == ActionCode.NB_WRITE_INTEREST) {
AtomicBoolean isReady = (AtomicBoolean)param;
try {
isReady.set(getOutputBuffer().isReady());
} catch (IOException e) {
getLog().debug("isReady() failed", e);
error = true;
}
} else if (actionCode == ActionCode.NB_READ_INTEREST) {
registerForEvent(true, false);
} else if (actionCode == ActionCode.REQUEST_BODY_FULLY_READ) {
AtomicBoolean result = (AtomicBoolean) param;
result.set(getInputBuffer().isFinished());
} else if (actionCode == ActionCode.DISPATCH_READ) {
socketWrapper.addDispatch(DispatchType.NON_BLOCKING_READ);
} else if (actionCode == ActionCode.DISPATCH_WRITE) {
socketWrapper.addDispatch(DispatchType.NON_BLOCKING_WRITE);
} else if (actionCode == ActionCode.DISPATCH_EXECUTE) {
getEndpoint().executeNonBlockingDispatches(socketWrapper);
} else {
actionInternal(actionCode, param);
}
}
abstract void actionInternal(ActionCode actionCode, Object param);
/**
* Processors (currently only HTTP BIO) may elect to disable HTTP keep-alive
* in some circumstances. This method allows the processor implementation to
* determine if keep-alive should be disabled or not.
*/
protected abstract boolean disableKeepAlive();
/**
* Configures the timeout to be used for reading the request line.
*/
protected abstract void setRequestLineReadTimeout() throws IOException;
/**
* Defines how a connector handles an incomplete request line read.
*
* @return true if the processor should break out of the
* processing loop, otherwise false.
*/
protected abstract boolean handleIncompleteRequestLineRead();
/**
* Set the socket timeout.
*/
protected abstract void setSocketTimeout(int timeout) throws IOException;
/**
* Process pipelined HTTP requests using the specified input and output
* streams.
*
* @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
setSocketWrapper(socketWrapper);
getInputBuffer().init(socketWrapper, endpoint);
getOutputBuffer().init(socketWrapper, endpoint);
// Flags
error = false;
keepAlive = true;
comet = false;
openSocket = false;
sendfileInProgress = false;
readComplete = true;
if (endpoint.getUsePolling()) {
keptAlive = false;
} else {
keptAlive = socketWrapper.isKeptAlive();
}
if (disableKeepAlive()) {
socketWrapper.setKeepAliveLeft(0);
}
while (!error && keepAlive && !comet && !isAsync() &&
httpUpgradeHandler == null && !endpoint.isPaused()) {
// Parsing the request header
try {
setRequestLineReadTimeout();
if (!getInputBuffer().parseRequestLine(keptAlive)) {
if (handleIncompleteRequestLineRead()) {
break;
}
}
if (endpoint.isPaused()) {
// 503 - Service unavailable
response.setStatus(503);
error = true;
} else {
// Make sure that connectors that are non-blocking during
// header processing (NIO) only set the start time the first
// time a request is processed.
if (request.getStartTime() < 0) {
request.setStartTime(System.currentTimeMillis());
}
keptAlive = true;
// Set this every time in case limit has been changed via JMX
request.getMimeHeaders().setLimit(endpoint.getMaxHeaderCount());
// Currently only NIO will ever return false here
if (!getInputBuffer().parseHeaders()) {
// We've read part of the request, don't recycle it
// instead associate it with the socket
openSocket = true;
readComplete = false;
break;
}
if (!disableUploadTimeout) {
setSocketTimeout(connectionUploadTimeout);
}
}
} catch (IOException e) {
if (getLog().isDebugEnabled()) {
getLog().debug(
sm.getString("http11processor.header.parse"), e);
}
error = true;
break;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
UserDataHelper.Mode logMode = userDataHelper.getNextMode();
if (logMode != null) {
String message = sm.getString(
"http11processor.header.parse");
switch (logMode) {
case INFO_THEN_DEBUG:
message += sm.getString(
"http11processor.fallToDebug");
//$FALL-THROUGH$
case INFO:
getLog().info(message);
break;
case DEBUG:
getLog().debug(message);
}
}
// 400 - Bad Request
response.setStatus(400);
getAdapter().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 (getLog().isDebugEnabled()) {
getLog().debug(sm.getString(
"http11processor.request.prepare"), t);
}
// 400 - Internal Server Error
response.setStatus(400);
getAdapter().log(request, response, 0);
error = true;
}
}
if (maxKeepAliveRequests == 1) {
keepAlive = false;
} else if (maxKeepAliveRequests > 0 &&
socketWrapper.decrementKeepAlive() <= 0) {
keepAlive = false;
}
// Process the request in the adapter
if (!error) {
try {
rp.setStage(org.apache.coyote.Constants.STAGE_SERVICE);
getAdapter().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()));
}
setCometTimeouts(socketWrapper);
} catch (InterruptedIOException e) {
error = true;
} catch (HeadersTooLargeException e) {
error = true;
// The response should not have been committed but check it
// anyway to be safe
if (!response.isCommitted()) {
response.reset();
response.setStatus(500);
response.setHeader("Connection", "close");
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
getLog().error(sm.getString(
"http11processor.request.process"), t);
// 500 - Internal Server Error
response.setStatus(500);
getAdapter().log(request, response, 0);
error = true;
}
}
// Finish the handling of the request
rp.setStage(org.apache.coyote.Constants.STAGE_ENDINPUT);
if (!isAsync() && !comet) {
if (error) {
// 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.
getInputBuffer().setSwallowInput(false);
}
if (response.getStatus() < 200 || response.getStatus() > 299) {
if (expectation) {
// Client sent Expect: 100-continue but received a
// non-2xx response. Disable keep-alive (if enabled) to
// ensure the connection is closed. Some clients may
// still send the body, some may send the next request.
// No way to differentiate, so close the connection to
// force the client to send the next request.
getInputBuffer().setSwallowInput(false);
keepAlive = false;
}
}
endRequest();
}
rp.setStage(org.apache.coyote.Constants.STAGE_ENDOUTPUT);
// 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();
if (!isAsync() && !comet || error) {
getInputBuffer().nextRequest();
getOutputBuffer().nextRequest();
}
if (!disableUploadTimeout) {
if(endpoint.getSoTimeout() > 0) {
setSocketTimeout(endpoint.getSoTimeout());
} else {
setSocketTimeout(0);
}
}
rp.setStage(org.apache.coyote.Constants.STAGE_KEEPALIVE);
if (breakKeepAliveLoop(socketWrapper)) {
break;
}
}
rp.setStage(org.apache.coyote.Constants.STAGE_ENDED);
if (error || endpoint.isPaused()) {
return SocketState.CLOSED;
} else if (isAsync() || comet) {
return SocketState.LONG;
} else if (isUpgrade()) {
return SocketState.UPGRADING;
} else {
if (sendfileInProgress) {
return SocketState.SENDFILE;
} else {
if (openSocket) {
if (readComplete) {
return SocketState.OPEN;
} else {
return SocketState.LONG;
}
} else {
return SocketState.CLOSED;
}
}
}
}
/**
* After reading the request headers, we have to setup the request filters.
*/
protected void prepareRequest() {
http11 = true;
http09 = false;
contentDelimitation = false;
expectation = false;
prepareRequestInternal();
if (endpoint.isSSLEnabled()) {
request.scheme().setString("https");
}
MessageBytes protocolMB = request.protocol();
if (protocolMB.equals(Constants.HTTP_11)) {
http11 = true;
protocolMB.setString(Constants.HTTP_11);
} else if (protocolMB.equals(Constants.HTTP_10)) {
http11 = false;
keepAlive = false;
protocolMB.setString(Constants.HTTP_10);
} else if (protocolMB.equals("")) {
// HTTP/0.9
http09 = true;
http11 = false;
keepAlive = false;
} else {
// Unsupported protocol
http11 = false;
error = true;
// Send 505; Unsupported HTTP version
if (getLog().isDebugEnabled()) {
getLog().debug(sm.getString("http11processor.request.prepare")+
" Unsupported HTTP version \""+protocolMB+"\"");
}
response.setStatus(505);
}
MessageBytes methodMB = request.method();
if (methodMB.equals(Constants.GET)) {
methodMB.setString(Constants.GET);
} else if (methodMB.equals(Constants.POST)) {
methodMB.setString(Constants.POST);
}
MimeHeaders headers = request.getMimeHeaders();
// Check connection header
MessageBytes connectionValueMB = headers.getValue(Constants.CONNECTION);
if (connectionValueMB != null) {
ByteChunk connectionValueBC = connectionValueMB.getByteChunk();
if (findBytes(connectionValueBC, Constants.CLOSE_BYTES) != -1) {
keepAlive = false;
} else if (findBytes(connectionValueBC,
Constants.KEEPALIVE_BYTES) != -1) {
keepAlive = true;
}
}
MessageBytes expectMB = null;
if (http11) {
expectMB = headers.getValue("expect");
}
if ((expectMB != null)
&& (expectMB.indexOfIgnoreCase("100-continue", 0) != -1)) {
getInputBuffer().setSwallowInput(false);
expectation = true;
}
// Check user-agent header
if ((restrictedUserAgents != null) && ((http11) || (keepAlive))) {
MessageBytes userAgentValueMB = headers.getValue("user-agent");
// Check in the restricted list, and adjust the http11
// and keepAlive flags accordingly
if(userAgentValueMB != null) {
String userAgentValue = userAgentValueMB.toString();
if (restrictedUserAgents != null &&
restrictedUserAgents.matcher(userAgentValue).matches()) {
http11 = false;
keepAlive = false;
}
}
}
// Check for a full URI (including protocol://host:port/)
ByteChunk uriBC = request.requestURI().getByteChunk();
if (uriBC.startsWithIgnoreCase("http", 0)) {
int pos = uriBC.indexOf("://", 0, 3, 4);
int uriBCStart = uriBC.getStart();
int slashPos = -1;
if (pos != -1) {
byte[] uriB = uriBC.getBytes();
slashPos = uriBC.indexOf('/', pos + 3);
if (slashPos == -1) {
slashPos = uriBC.getLength();
// Set URI as "/"
request.requestURI().setBytes
(uriB, uriBCStart + pos + 1, 1);
} else {
request.requestURI().setBytes
(uriB, uriBCStart + slashPos,
uriBC.getLength() - slashPos);
}
MessageBytes hostMB = headers.setValue("host");
hostMB.setBytes(uriB, uriBCStart + pos + 3,
slashPos - pos - 3);
}
}
// Input filter setup
InputFilter[] inputFilters = getInputBuffer().getFilters();
// Parse transfer-encoding header
MessageBytes transferEncodingValueMB = null;
if (http11) {
transferEncodingValueMB = headers.getValue("transfer-encoding");
}
if (transferEncodingValueMB != null) {
String transferEncodingValue = transferEncodingValueMB.toString();
// Parse the comma separated list. "identity" codings are ignored
int startPos = 0;
int commaPos = transferEncodingValue.indexOf(',');
String encodingName = null;
while (commaPos != -1) {
encodingName = transferEncodingValue.substring
(startPos, commaPos).toLowerCase(Locale.ENGLISH).trim();
if (!addInputFilter(inputFilters, encodingName)) {
// Unsupported transfer encoding
error = true;
// 501 - Unimplemented
response.setStatus(501);
}
startPos = commaPos + 1;
commaPos = transferEncodingValue.indexOf(',', startPos);
}
encodingName = transferEncodingValue.substring(startPos)
.toLowerCase(Locale.ENGLISH).trim();
if (!addInputFilter(inputFilters, encodingName)) {
// Unsupported transfer encoding
error = true;
// 501 - Unimplemented
if (getLog().isDebugEnabled()) {
getLog().debug(sm.getString("http11processor.request.prepare")+
" Unsupported transfer encoding \""+encodingName+"\"");
}
response.setStatus(501);
}
}
// Parse content-length header
long contentLength = request.getContentLengthLong();
if (contentLength >= 0) {
if (contentDelimitation) {
// contentDelimitation being true at this point indicates that
// chunked encoding is being used but chunked encoding should
// not be used with a content length. RFC 2616, section 4.4,
// bullet 3 states Content-Length must be ignored in this case -
// so remove it.
headers.removeHeader("content-length");
request.setContentLength(-1);
} else {
getInputBuffer().addActiveFilter
(inputFilters[Constants.IDENTITY_FILTER]);
contentDelimitation = true;
}
}
MessageBytes valueMB = headers.getValue("host");
// Check host header
if (http11 && (valueMB == null)) {
error = true;
// 400 - Bad request
if (getLog().isDebugEnabled()) {
getLog().debug(sm.getString("http11processor.request.prepare")+
" host header missing");
}
response.setStatus(400);
}
parseHost(valueMB);
if (!contentDelimitation) {
// If there's no content length
// (broken HTTP/1.0 or HTTP/1.1), assume
// the client is not broken and didn't send a body
getInputBuffer().addActiveFilter
(inputFilters[Constants.VOID_FILTER]);
contentDelimitation = true;
}
if (error) {
getAdapter().log(request, response, 0);
}
}
/**
* Connector implementation specific request preparation. Ideally, this will
* go away in the future.
*/
protected abstract void prepareRequestInternal();
/**
* When committing the response, we have to validate the set of headers, as
* well as setup the response filters.
*/
private void prepareResponse() {
boolean entityBody = true;
contentDelimitation = false;
OutputFilter[] outputFilters = getOutputBuffer().getFilters();
if (http09 == true) {
// HTTP/0.9
getOutputBuffer().addActiveFilter
(outputFilters[Constants.IDENTITY_FILTER]);
return;
}
int statusCode = response.getStatus();
if (statusCode < 200 || statusCode == 204 || statusCode == 205 ||
statusCode == 304) {
// No entity body
getOutputBuffer().addActiveFilter
(outputFilters[Constants.VOID_FILTER]);
entityBody = false;
contentDelimitation = true;
}
MessageBytes methodMB = request.method();
if (methodMB.equals("HEAD")) {
// No entity body
getOutputBuffer().addActiveFilter
(outputFilters[Constants.VOID_FILTER]);
contentDelimitation = true;
}
// Sendfile support
boolean sendingWithSendfile = false;
if (getEndpoint().getUseSendfile()) {
sendingWithSendfile = prepareSendfile(outputFilters);
}
// Check for compression
boolean isCompressable = false;
boolean useCompression = false;
if (entityBody && (compressionLevel > 0) && !sendingWithSendfile) {
isCompressable = isCompressable();
if (isCompressable) {
useCompression = useCompression();
}
// Change content-length to -1 to force chunking
if (useCompression) {
response.setContentLength(-1);
}
}
MimeHeaders headers = response.getMimeHeaders();
if (!entityBody) {
response.setContentLength(-1);
}
// A SC_NO_CONTENT response may include entity headers
if (entityBody || statusCode == HttpServletResponse.SC_NO_CONTENT) {
String contentType = response.getContentType();
if (contentType != null) {
headers.setValue("Content-Type").setString(contentType);
}
String contentLanguage = response.getContentLanguage();
if (contentLanguage != null) {
headers.setValue("Content-Language")
.setString(contentLanguage);
}
}
long contentLength = response.getContentLengthLong();
boolean connectionClosePresent = false;
if (contentLength != -1) {
headers.setValue("Content-Length").setLong(contentLength);
getOutputBuffer().addActiveFilter
(outputFilters[Constants.IDENTITY_FILTER]);
contentDelimitation = true;
} else {
// If the response code supports an entity body and we're on
// HTTP 1.1 then we chunk unless we have a Connection: close header
connectionClosePresent = isConnectionClose(headers);
if (entityBody && http11 && !connectionClosePresent) {
getOutputBuffer().addActiveFilter
(outputFilters[Constants.CHUNKED_FILTER]);
contentDelimitation = true;
headers.addValue(Constants.TRANSFERENCODING).setString(Constants.CHUNKED);
} else {
getOutputBuffer().addActiveFilter
(outputFilters[Constants.IDENTITY_FILTER]);
}
}
if (useCompression) {
getOutputBuffer().addActiveFilter(outputFilters[Constants.GZIP_FILTER]);
headers.setValue("Content-Encoding").setString("gzip");
}
// If it might be compressed, set the Vary header
if (isCompressable) {
// Make Proxies happy via Vary (from mod_deflate)
MessageBytes vary = headers.getValue("Vary");
if (vary == null) {
// Add a new Vary header
headers.setValue("Vary").setString("Accept-Encoding");
} else if (vary.equals("*")) {
// No action required
} else {
// Merge into current header
headers.setValue("Vary").setString(
vary.getString() + ",Accept-Encoding");
}
}
// Add date header unless application has already set one (e.g. in a
// Caching Filter)
if (headers.getValue("Date") == null) {
headers.setValue("Date").setString(
FastHttpDateFormat.getCurrentDate());
}
// FIXME: Add transfer encoding header
if ((entityBody) && (!contentDelimitation)) {
// Mark as close the connection after the request, and add the
// connection: close header
keepAlive = false;
}
// If we know that the request is bad this early, add the
// Connection: close header.
keepAlive = keepAlive && !statusDropsConnection(statusCode);
if (!keepAlive) {
// Avoid adding the close header twice
if (!connectionClosePresent) {
headers.addValue(Constants.CONNECTION).setString(
Constants.CLOSE);
}
} else if (!http11 && !error) {
headers.addValue(Constants.CONNECTION).setString(Constants.KEEPALIVE);
}
// Build the response header
getOutputBuffer().sendStatus();
// Add server header
if (server != null) {
// Always overrides anything the app might set
headers.setValue("Server").setString(server);
} else if (headers.getValue("Server") == null) {
// If app didn't set the header, use the default
getOutputBuffer().write(Constants.SERVER_BYTES);
}
int size = headers.size();
for (int i = 0; i < size; i++) {
getOutputBuffer().sendHeader(headers.getName(i), headers.getValue(i));
}
getOutputBuffer().endHeaders();
}
private boolean isConnectionClose(MimeHeaders headers) {
MessageBytes connection = headers.getValue(Constants.CONNECTION);
if (connection == null) {
return false;
}
return connection.equals(Constants.CLOSE);
}
abstract boolean prepareSendfile(OutputFilter[] outputFilters);
/**
* Parse host.
*/
protected void parseHost(MessageBytes valueMB) {
if (valueMB == null || valueMB.isNull()) {
// HTTP/1.0
// If no host header, use the port info from the endpoint
// The host will be obtained lazily from the socket if required
// using ActionCode#REQ_LOCAL_NAME_ATTRIBUTE
request.setServerPort(endpoint.getPort());
return;
}
ByteChunk valueBC = valueMB.getByteChunk();
byte[] valueB = valueBC.getBytes();
int valueL = valueBC.getLength();
int valueS = valueBC.getStart();
int colonPos = -1;
if (hostNameC.length < valueL) {
hostNameC = new char[valueL];
}
boolean ipv6 = (valueB[valueS] == '[');
boolean bracketClosed = false;
for (int i = 0; i < valueL; i++) {
char b = (char) valueB[i + valueS];
hostNameC[i] = b;
if (b == ']') {
bracketClosed = true;
} else if (b == ':') {
if (!ipv6 || bracketClosed) {
colonPos = i;
break;
}
}
}
if (colonPos < 0) {
if (!endpoint.isSSLEnabled()) {
// 80 - Default HTTP port
request.setServerPort(80);
} else {
// 443 - Default HTTPS port
request.setServerPort(443);
}
request.serverName().setChars(hostNameC, 0, valueL);
} else {
request.serverName().setChars(hostNameC, 0, colonPos);
int port = 0;
int mult = 1;
for (int i = valueL - 1; i > colonPos; i--) {
int charValue = HexUtils.getDec(valueB[i + valueS]);
if (charValue == -1 || charValue > 9) {
// Invalid character
error = true;
// 400 - Bad request
response.setStatus(400);
break;
}
port = port + (charValue * mult);
mult = 10 * mult;
}
request.setServerPort(port);
}
}
@Override
public SocketState asyncDispatch(SocketStatus status) {
if (status == SocketStatus.OPEN_WRITE) {
try {
asyncStateMachine.asyncOperation();
try {
if (outputBuffer.hasDataToWrite()) {
if (outputBuffer.flushBuffer(false)) {
// There is data to write but go via Response to
// maintain a consistent view of non-blocking state
response.checkRegisterForWrite(true);
return SocketState.LONG;
}
}
} catch (IOException x) {
if (getLog().isDebugEnabled()) {
getLog().debug("Unable to write async data.",x);
}
status = SocketStatus.ASYNC_WRITE_ERROR;
request.setAttribute(RequestDispatcher.ERROR_EXCEPTION, x);
}
} catch (IllegalStateException x) {
registerForEvent(false, true);
}
} else if (status == SocketStatus.OPEN_READ &&
request.getReadListener() != null) {
try {
if (inputBuffer.available() > 0) {
asyncStateMachine.asyncOperation();
}
} catch (IllegalStateException x) {
registerForEvent(true, false);
}
}
RequestInfo rp = request.getRequestProcessor();
try {
rp.setStage(org.apache.coyote.Constants.STAGE_SERVICE);
error = !getAdapter().asyncDispatch(request, response, status);
resetTimeouts();
} catch (InterruptedIOException e) {
error = true;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
getLog().error(sm.getString("http11processor.request.process"), t);
error = true;
}
rp.setStage(org.apache.coyote.Constants.STAGE_ENDED);
if (error) {
return SocketState.CLOSED;
} else if (isAsync()) {
return SocketState.LONG;
} else {
if (!keepAlive) {
return SocketState.CLOSED;
} else {
getInputBuffer().nextRequest();
getOutputBuffer().nextRequest();
return SocketState.OPEN;
}
}
}
@Override
public boolean isComet() {
return comet;
}
@Override
public boolean isUpgrade() {
return httpUpgradeHandler != null;
}
@Override
public SocketState upgradeDispatch(SocketStatus status) throws IOException {
// Should never reach this code but in case we do...
throw new IllegalStateException(
sm.getString("http11Processor.upgrade"));
}
@Override
public HttpUpgradeHandler getHttpUpgradeHandler() {
return httpUpgradeHandler;
}
/**
* Provides a mechanism for those connector implementations (currently only
* NIO) that need to reset timeouts from Async timeouts to standard HTTP
* timeouts once async processing completes.
*/
protected abstract void resetTimeouts();
/**
* Provides a mechanism for those connectors (currently only NIO) that need
* that need to set comet timeouts.
*/
protected abstract void setCometTimeouts(SocketWrapper socketWrapper);
public void endRequest() {
// Finish the handling of the request
try {
getInputBuffer().endRequest();
} catch (IOException e) {
error = true;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
getLog().error(sm.getString("http11processor.request.finish"), t);
// 500 - Internal Server Error
// Can't add a 500 to the access log since that has already been
// written in the Adapter.service method.
response.setStatus(500);
error = true;
}
try {
getOutputBuffer().endRequest();
} catch (IOException e) {
error = true;
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
getLog().error(sm.getString("http11processor.response.finish"), t);
error = true;
}
}
/**
* Checks to see if the keep-alive loop should be broken, performing any
* processing (e.g. sendfile handling) that may have an impact on whether
* or not the keep-alive loop should be broken.
* @return true if the keep-alive loop should be broken
*/
protected abstract boolean breakKeepAliveLoop(
SocketWrapper socketWrapper);
@Override
public final void recycle(boolean isSocketClosing) {
if (getInputBuffer() != null) {
getInputBuffer().recycle();
}
if (getOutputBuffer() != null) {
getOutputBuffer().recycle();
}
if (asyncStateMachine != null) {
asyncStateMachine.recycle();
}
httpUpgradeHandler = null;
comet = false;
recycleInternal();
}
protected abstract void recycleInternal();
}
