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Http11Processor.java
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Http11Processor.java
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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.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.coyote.AbstractProcessor;
import org.apache.coyote.ActionCode;
import org.apache.coyote.Adapter;
import org.apache.coyote.ErrorState;
import org.apache.coyote.Request;
import org.apache.coyote.RequestInfo;
import org.apache.coyote.UpgradeProtocol;
import org.apache.coyote.UpgradeToken;
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.coyote.http11.upgrade.InternalHttpUpgradeHandler;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.buf.ByteChunk;
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.http.parser.HttpParser;
import org.apache.tomcat.util.http.parser.TokenList;
import org.apache.tomcat.util.log.UserDataHelper;
import org.apache.tomcat.util.net.AbstractEndpoint.Handler.SocketState;
import org.apache.tomcat.util.net.SSLSupport;
import org.apache.tomcat.util.net.SendfileDataBase;
import org.apache.tomcat.util.net.SendfileKeepAliveState;
import org.apache.tomcat.util.net.SendfileState;
import org.apache.tomcat.util.net.SocketWrapperBase;
import org.apache.tomcat.util.res.StringManager;
public class Http11Processor extends AbstractProcessor {
private static final Log log = LogFactory.getLog(Http11Processor.class);
/**
* The string manager for this package.
*/
private static final StringManager sm = StringManager.getManager(Http11Processor.class);
private final AbstractHttp11Protocol<?> protocol;
/**
* Input.
*/
private final Http11InputBuffer inputBuffer;
/**
* Output.
*/
private final Http11OutputBuffer outputBuffer;
private final HttpParser httpParser;
/**
* 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;
/**
* Keep-alive.
*/
private volatile boolean keepAlive = true;
/**
* Flag used to indicate that the socket should be kept open (e.g. for keep
* alive or send file.
*/
private boolean openSocket = false;
/**
* Flag that indicates if the request headers have been completely read.
*/
private boolean readComplete = true;
/**
* HTTP/1.1 flag.
*/
private boolean http11 = true;
/**
* HTTP/0.9 flag.
*/
private boolean http09 = false;
/**
* Content delimiter for the request (if false, the connection will
* be closed at the end of the request).
*/
private boolean contentDelimitation = true;
/**
* Instance of the new protocol to use after the HTTP connection has been
* upgraded.
*/
private UpgradeToken upgradeToken = null;
/**
* Sendfile data.
*/
private SendfileDataBase sendfileData = null;
public Http11Processor(AbstractHttp11Protocol<?> protocol, Adapter adapter) {
super(adapter);
this.protocol = protocol;
httpParser = new HttpParser(protocol.getRelaxedPathChars(),
protocol.getRelaxedQueryChars());
inputBuffer = new Http11InputBuffer(request, protocol.getMaxHttpHeaderSize(),
protocol.getRejectIllegalHeader(), httpParser);
request.setInputBuffer(inputBuffer);
outputBuffer = new Http11OutputBuffer(response, protocol.getMaxHttpHeaderSize());
response.setOutputBuffer(outputBuffer);
// Create and add the identity filters.
inputBuffer.addFilter(new IdentityInputFilter(protocol.getMaxSwallowSize()));
outputBuffer.addFilter(new IdentityOutputFilter());
// Create and add the chunked filters.
inputBuffer.addFilter(new ChunkedInputFilter(protocol.getMaxTrailerSize(),
protocol.getAllowedTrailerHeadersInternal(), protocol.getMaxExtensionSize(),
protocol.getMaxSwallowSize()));
outputBuffer.addFilter(new ChunkedOutputFilter());
// Create and add the void filters.
inputBuffer.addFilter(new VoidInputFilter());
outputBuffer.addFilter(new VoidOutputFilter());
// Create and add buffered input filter
inputBuffer.addFilter(new BufferedInputFilter());
// Create and add the gzip filters.
//inputBuffer.addFilter(new GzipInputFilter());
outputBuffer.addFilter(new GzipOutputFilter());
pluggableFilterIndex = inputBuffer.getFilters().length;
}
/**
* Determine if we must drop the connection because of the HTTP status
* code. Use the same list of codes as Apache/httpd.
*/
private static 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 */;
}
/**
* Add an input filter to the current request. If the encoding is not
* supported, a 501 response will be returned to the client.
*/
private void addInputFilter(InputFilter[] inputFilters, String encodingName) {
// Parsing trims and converts to lower case.
if (encodingName.equals("identity")) {
// Skip
} else if (encodingName.equals("chunked")) {
inputBuffer.addActiveFilter
(inputFilters[Constants.CHUNKED_FILTER]);
contentDelimitation = true;
} else {
for (int i = pluggableFilterIndex; i < inputFilters.length; i++) {
if (inputFilters[i].getEncodingName().toString().equals(encodingName)) {
inputBuffer.addActiveFilter(inputFilters[i]);
return;
}
}
// Unsupported transfer encoding
// 501 - Unimplemented
response.setStatus(501);
setErrorState(ErrorState.CLOSE_CLEAN, null);
if (log.isDebugEnabled()) {
log.debug(sm.getString("http11processor.request.prepare") +
" Unsupported transfer encoding [" + encodingName + "]");
}
}
}
@Override
public SocketState service(SocketWrapperBase<?> socketWrapper)
throws IOException {
RequestInfo rp = request.getRequestProcessor();
rp.setStage(org.apache.coyote.Constants.STAGE_PARSE);
// Setting up the I/O
setSocketWrapper(socketWrapper);
// Flags
keepAlive = true;
openSocket = false;
readComplete = true;
boolean keptAlive = false;
SendfileState sendfileState = SendfileState.DONE;
while (!getErrorState().isError() && keepAlive && !isAsync() && upgradeToken == null &&
sendfileState == SendfileState.DONE && !protocol.isPaused()) {
// Parsing the request header
try {
if (!inputBuffer.parseRequestLine(keptAlive, protocol.getConnectionTimeout(),
protocol.getKeepAliveTimeout())) {
if (inputBuffer.getParsingRequestLinePhase() == -1) {
return SocketState.UPGRADING;
} else if (handleIncompleteRequestLineRead()) {
break;
}
}
// Process the Protocol component of the request line
// Need to know if this is an HTTP 0.9 request before trying to
// parse headers.
prepareRequestProtocol();
if (protocol.isPaused()) {
// 503 - Service unavailable
response.setStatus(503);
setErrorState(ErrorState.CLOSE_CLEAN, null);
} else {
keptAlive = true;
// Set this every time in case limit has been changed via JMX
request.getMimeHeaders().setLimit(protocol.getMaxHeaderCount());
// Don't parse headers for HTTP/0.9
if (!http09 && !inputBuffer.parseHeaders()) {
// We've read part of the request, don't recycle it
// instead associate it with the socket
openSocket = true;
readComplete = false;
break;
}
if (!protocol.getDisableUploadTimeout()) {
socketWrapper.setReadTimeout(protocol.getConnectionUploadTimeout());
}
}
} catch (IOException e) {
if (log.isDebugEnabled()) {
log.debug(sm.getString("http11processor.header.parse"), e);
}
setErrorState(ErrorState.CLOSE_CONNECTION_NOW, e);
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:
log.info(message, t);
break;
case DEBUG:
log.debug(message, t);
}
}
// 400 - Bad Request
response.setStatus(400);
setErrorState(ErrorState.CLOSE_CLEAN, t);
}
// Has an upgrade been requested?
if (isConnectionToken(request.getMimeHeaders(), "upgrade")) {
// Check the protocol
String requestedProtocol = request.getHeader("Upgrade");
UpgradeProtocol upgradeProtocol = protocol.getUpgradeProtocol(requestedProtocol);
if (upgradeProtocol != null) {
if (upgradeProtocol.accept(request)) {
response.setStatus(HttpServletResponse.SC_SWITCHING_PROTOCOLS);
response.setHeader("Connection", "Upgrade");
response.setHeader("Upgrade", requestedProtocol);
action(ActionCode.CLOSE, null);
getAdapter().log(request, response, 0);
InternalHttpUpgradeHandler upgradeHandler =
upgradeProtocol.getInternalUpgradeHandler(
socketWrapper, getAdapter(), cloneRequest(request));
UpgradeToken upgradeToken = new UpgradeToken(upgradeHandler, null, null);
action(ActionCode.UPGRADE, upgradeToken);
return SocketState.UPGRADING;
}
}
}
if (getErrorState().isIoAllowed()) {
// 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);
}
// 500 - Internal Server Error
response.setStatus(500);
setErrorState(ErrorState.CLOSE_CLEAN, t);
}
}
int maxKeepAliveRequests = protocol.getMaxKeepAliveRequests();
if (maxKeepAliveRequests == 1) {
keepAlive = false;
} else if (maxKeepAliveRequests > 0 &&
socketWrapper.decrementKeepAlive() <= 0) {
keepAlive = false;
}
// Process the request in the adapter
if (getErrorState().isIoAllowed()) {
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 && !getErrorState().isError() && !isAsync() &&
statusDropsConnection(response.getStatus())) {
setErrorState(ErrorState.CLOSE_CLEAN, null);
}
} catch (InterruptedIOException e) {
setErrorState(ErrorState.CLOSE_CONNECTION_NOW, e);
} catch (HeadersTooLargeException e) {
log.error(sm.getString("http11processor.request.process"), e);
// The response should not have been committed but check it
// anyway to be safe
if (response.isCommitted()) {
setErrorState(ErrorState.CLOSE_NOW, e);
} else {
response.reset();
response.setStatus(500);
setErrorState(ErrorState.CLOSE_CLEAN, e);
response.setHeader("Connection", "close"); // TODO: Remove
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(sm.getString("http11processor.request.process"), t);
// 500 - Internal Server Error
response.setStatus(500);
setErrorState(ErrorState.CLOSE_CLEAN, t);
getAdapter().log(request, response, 0);
}
}
// Finish the handling of the request
rp.setStage(org.apache.coyote.Constants.STAGE_ENDINPUT);
if (!isAsync()) {
// If this is an async request then the request ends when it has
// been completed. The AsyncContext is responsible for calling
// endRequest() in that case.
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 (getErrorState().isError()) {
response.setStatus(500);
}
if (!isAsync() || getErrorState().isError()) {
request.updateCounters();
if (getErrorState().isIoAllowed()) {
inputBuffer.nextRequest();
outputBuffer.nextRequest();
}
}
if (!protocol.getDisableUploadTimeout()) {
int connectionTimeout = protocol.getConnectionTimeout();
if(connectionTimeout > 0) {
socketWrapper.setReadTimeout(connectionTimeout);
} else {
socketWrapper.setReadTimeout(0);
}
}
rp.setStage(org.apache.coyote.Constants.STAGE_KEEPALIVE);
sendfileState = processSendfile(socketWrapper);
}
rp.setStage(org.apache.coyote.Constants.STAGE_ENDED);
if (getErrorState().isError() || (protocol.isPaused() && !isAsync())) {
return SocketState.CLOSED;
} else if (isAsync()) {
return SocketState.LONG;
} else if (isUpgrade()) {
return SocketState.UPGRADING;
} else {
if (sendfileState == SendfileState.PENDING) {
return SocketState.SENDFILE;
} else {
if (openSocket) {
if (readComplete) {
return SocketState.OPEN;
} else {
return SocketState.LONG;
}
} else {
return SocketState.CLOSED;
}
}
}
}
@Override
protected final void setSocketWrapper(SocketWrapperBase<?> socketWrapper) {
super.setSocketWrapper(socketWrapper);
inputBuffer.init(socketWrapper);
outputBuffer.init(socketWrapper);
}
private Request cloneRequest(Request source) throws IOException {
Request dest = new Request();
// Transfer the minimal information required for the copy of the Request
// that is passed to the HTTP upgrade process
dest.decodedURI().duplicate(source.decodedURI());
dest.method().duplicate(source.method());
dest.getMimeHeaders().duplicate(source.getMimeHeaders());
dest.requestURI().duplicate(source.requestURI());
dest.queryString().duplicate(source.queryString());
return dest;
}
private boolean handleIncompleteRequestLineRead() {
// Haven't finished reading the request so keep the socket
// open
openSocket = true;
// Check to see if we have read any of the request line yet
if (inputBuffer.getParsingRequestLinePhase() > 1) {
// Started to read request line.
if (protocol.isPaused()) {
// Partially processed the request so need to respond
response.setStatus(503);
setErrorState(ErrorState.CLOSE_CLEAN, null);
return false;
} else {
// Need to keep processor associated with socket
readComplete = false;
}
}
return true;
}
private void checkExpectationAndResponseStatus() {
if (request.hasExpectation() &&
(response.getStatus() < 200 || response.getStatus() > 299)) {
// Client sent Expect: 100-continue but received a
// non-2xx final response. Disable keep-alive (if enabled)
// to ensure that 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.
inputBuffer.setSwallowInput(false);
keepAlive = false;
}
}
private void prepareRequestProtocol() {
MessageBytes protocolMB = request.protocol();
if (protocolMB.equals(Constants.HTTP_11)) {
http09 = false;
http11 = true;
protocolMB.setString(Constants.HTTP_11);
} else if (protocolMB.equals(Constants.HTTP_10)) {
http09 = false;
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
http09 = false;
http11 = false;
// Send 505; Unsupported HTTP version
response.setStatus(505);
setErrorState(ErrorState.CLOSE_CLEAN, null);
if (log.isDebugEnabled()) {
log.debug(sm.getString("http11processor.request.prepare")+
" Unsupported HTTP version \""+protocolMB+"\"");
}
}
}
/**
* After reading the request headers, we have to setup the request filters.
*/
private void prepareRequest() throws IOException {
contentDelimitation = false;
if (protocol.isSSLEnabled()) {
request.scheme().setString("https");
}
MimeHeaders headers = request.getMimeHeaders();
// Check connection header
MessageBytes connectionValueMB = headers.getValue(Constants.CONNECTION);
if (connectionValueMB != null && !connectionValueMB.isNull()) {
Set<String> tokens = new HashSet<>();
TokenList.parseTokenList(headers.values(Constants.CONNECTION), tokens);
if (tokens.contains(Constants.CLOSE)) {
keepAlive = false;
} else if (tokens.contains(Constants.KEEP_ALIVE_HEADER_VALUE_TOKEN)) {
keepAlive = true;
}
}
if (http11) {
MessageBytes expectMB = headers.getValue("expect");
if (expectMB != null && !expectMB.isNull()) {
if (expectMB.toString().trim().equalsIgnoreCase("100-continue")) {
inputBuffer.setSwallowInput(false);
request.setExpectation(true);
} else {
response.setStatus(HttpServletResponse.SC_EXPECTATION_FAILED);
setErrorState(ErrorState.CLOSE_CLEAN, null);
}
}
}
// Check user-agent header
Pattern restrictedUserAgents = protocol.getRestrictedUserAgentsPattern();
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 && !userAgentValueMB.isNull()) {
String userAgentValue = userAgentValueMB.toString();
if (restrictedUserAgents.matcher(userAgentValue).matches()) {
http11 = false;
keepAlive = false;
}
}
}
// Check host header
MessageBytes hostValueMB = null;
try {
hostValueMB = headers.getUniqueValue("host");
} catch (IllegalArgumentException iae) {
// Multiple Host headers are not permitted
badRequest("http11processor.request.multipleHosts");
}
if (http11 && hostValueMB == null) {
badRequest("http11processor.request.noHostHeader");
}
// Check for an absolute-URI less the query string which has already
// been removed during the parsing of the request line
ByteChunk uriBC = request.requestURI().getByteChunk();
byte[] uriB = uriBC.getBytes();
if (uriBC.startsWithIgnoreCase("http", 0)) {
int pos = 4;
// Check for https
if (uriBC.startsWithIgnoreCase("s", pos)) {
pos++;
}
// Next 3 characters must be "://"
if (uriBC.startsWith("://", pos)) {
pos += 3;
int uriBCStart = uriBC.getStart();
// '/' does not appear in the authority so use the first
// instance to split the authority and the path segments
int slashPos = uriBC.indexOf('/', pos);
// '@' in the authority delimits the userinfo
int atPos = uriBC.indexOf('@', pos);
if (slashPos > -1 && atPos > slashPos) {
// First '@' is in the path segments so no userinfo
atPos = -1;
}
if (slashPos == -1) {
slashPos = uriBC.getLength();
// Set URI as "/". Use 6 as it will always be a '/'.
// 01234567
// http://
// https://
request.requestURI().setBytes(uriB, uriBCStart + 6, 1);
} else {
request.requestURI().setBytes(uriB, uriBCStart + slashPos, uriBC.getLength() - slashPos);
}
// Skip any user info
if (atPos != -1) {
// Validate the userinfo
for (; pos < atPos; pos++) {
byte c = uriB[uriBCStart + pos];
if (!HttpParser.isUserInfo(c)) {
// Strictly there needs to be a check for valid %nn
// encoding here but skip it since it will never be
// decoded because the userinfo is ignored
badRequest("http11processor.request.invalidUserInfo");
break;
}
}
// Skip the '@'
pos = atPos + 1;
}
if (http11) {
// Missing host header is illegal but handled above
if (hostValueMB != null) {
// Any host in the request line must be consistent with
// the Host header
if (!hostValueMB.getByteChunk().equals(
uriB, uriBCStart + pos, slashPos - pos)) {
if (protocol.getAllowHostHeaderMismatch()) {
// The requirements of RFC 2616 are being
// applied. If the host header and the request
// line do not agree, the request line takes
// precedence
hostValueMB = headers.setValue("host");
hostValueMB.setBytes(uriB, uriBCStart + pos, slashPos - pos);
} else {
// The requirements of RFC 7230 are being
// applied. If the host header and the request
// line do not agree, trigger a 400 response.
badRequest("http11processor.request.inconsistentHosts");
}
}
}
} else {
// Not HTTP/1.1 - no Host header so generate one since
// Tomcat internals assume it is set
try {
hostValueMB = headers.setValue("host");
hostValueMB.setBytes(uriB, uriBCStart + pos, slashPos - pos);
} catch (IllegalStateException e) {
// Edge case
// If the request has too many headers it won't be
// possible to create the host header. Ignore this as
// processing won't reach the point where the Tomcat
// internals expect there to be a host header.
}
}
} else {
badRequest("http11processor.request.invalidScheme");
}
}
// Validate the characters in the URI. %nn decoding will be checked at
// the point of decoding.
for (int i = uriBC.getStart(); i < uriBC.getEnd(); i++) {
if (!httpParser.isAbsolutePathRelaxed(uriB[i])) {
badRequest("http11processor.request.invalidUri");
break;
}
}
// Input filter setup
InputFilter[] inputFilters = inputBuffer.getFilters();
// Parse transfer-encoding header
if (http11) {
MessageBytes transferEncodingValueMB = headers.getValue("transfer-encoding");
if (transferEncodingValueMB != null) {
List<String> encodingNames = new ArrayList<>();
if (TokenList.parseTokenList(headers.values("transfer-encoding"), encodingNames)) {
for (String encodingName : encodingNames) {
// "identity" codings are ignored
addInputFilter(inputFilters, encodingName);
}
} else {
// Invalid transfer encoding
badRequest("http11processor.request.invalidTransferEncoding");
}
}
}
// Parse content-length header
long contentLength = -1;
try {
contentLength = request.getContentLengthLong();
} catch (NumberFormatException e) {
badRequest("http11processor.request.nonNumericContentLength");
} catch (IllegalArgumentException e) {
badRequest("http11processor.request.multipleContentLength");
}
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 {
inputBuffer.addActiveFilter(inputFilters[Constants.IDENTITY_FILTER]);
contentDelimitation = true;
}
}
// Validate host name and extract port if present
parseHost(hostValueMB);
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
inputBuffer.addActiveFilter(inputFilters[Constants.VOID_FILTER]);
contentDelimitation = true;
}
if (!getErrorState().isIoAllowed()) {
getAdapter().log(request, response, 0);
}
}
private void badRequest(String errorKey) {
response.setStatus(400);
setErrorState(ErrorState.CLOSE_CLEAN, null);
if (log.isDebugEnabled()) {
log.debug(sm.getString(errorKey));
}
}
/**
* When committing the response, we have to validate the set of headers, as
* well as setup the response filters.
*/
@Override
protected final void prepareResponse() throws IOException {
boolean entityBody = true;
contentDelimitation = false;
OutputFilter[] outputFilters = outputBuffer.getFilters();
if (http09 == true) {
// HTTP/0.9
outputBuffer.addActiveFilter(outputFilters[Constants.IDENTITY_FILTER]);
outputBuffer.commit();
return;
}
int statusCode = response.getStatus();
if (statusCode < 200 || statusCode == 204 || statusCode == 205 ||
statusCode == 304) {
// No entity body
outputBuffer.addActiveFilter
(outputFilters[Constants.VOID_FILTER]);
entityBody = false;
contentDelimitation = true;
if (statusCode == 205) {
// RFC 7231 requires the server to explicitly signal an empty
// response in this case
response.setContentLength(0);
} else {
response.setContentLength(-1);
}
}
MessageBytes methodMB = request.method();
if (methodMB.equals("HEAD")) {
// No entity body
outputBuffer.addActiveFilter
(outputFilters[Constants.VOID_FILTER]);
contentDelimitation = true;
}
// Sendfile support
if (protocol.getUseSendfile()) {
prepareSendfile(outputFilters);
}
// Check for compression
boolean useCompression = false;
if (entityBody && sendfileData == null) {
useCompression = protocol.useCompression(request, response);
}
MimeHeaders headers = response.getMimeHeaders();
// 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 = isConnectionToken(headers, Constants.CLOSE);
if (http11 && response.getTrailerFields() != null) {
// If trailer fields are set, always use chunking
outputBuffer.addActiveFilter(outputFilters[Constants.CHUNKED_FILTER]);
contentDelimitation = true;
headers.addValue(Constants.TRANSFERENCODING).setString(Constants.CHUNKED);
} else if (contentLength != -1) {
headers.setValue("Content-Length").setLong(contentLength);
outputBuffer.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
if (http11 && entityBody && !connectionClosePresent) {
outputBuffer.addActiveFilter(outputFilters[Constants.CHUNKED_FILTER]);
contentDelimitation = true;
headers.addValue(Constants.TRANSFERENCODING).setString(Constants.CHUNKED);
} else {
outputBuffer.addActiveFilter(outputFilters[Constants.IDENTITY_FILTER]);
}
}
if (useCompression) {
outputBuffer.addActiveFilter(outputFilters[Constants.GZIP_FILTER]);
}
// Add date header unless application has already set one (e.g. in a
// Caching Filter)
if (headers.getValue("Date") == null) {
headers.addValue("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;
}
// This may disabled keep-alive to check before working out the
// Connection header.
checkExpectationAndResponseStatus();
// If we know that the request is bad this early, add the
// Connection: close header.
if (keepAlive && statusDropsConnection(statusCode)) {
keepAlive = false;
}
if (!keepAlive) {
// Avoid adding the close header twice
if (!connectionClosePresent) {
headers.addValue(Constants.CONNECTION).setString(
Constants.CLOSE);
}
} else if (!getErrorState().isError()) {
if (!http11) {
headers.addValue(Constants.CONNECTION).setString(Constants.KEEP_ALIVE_HEADER_VALUE_TOKEN);
}
if (protocol.getUseKeepAliveResponseHeader()) {
boolean connectionKeepAlivePresent =
isConnectionToken(request.getMimeHeaders(), Constants.KEEP_ALIVE_HEADER_VALUE_TOKEN);
if (connectionKeepAlivePresent) {
int keepAliveTimeout = protocol.getKeepAliveTimeout();
if (keepAliveTimeout > 0) {
String value = "timeout=" + keepAliveTimeout / 1000L;
headers.setValue(Constants.KEEP_ALIVE_HEADER_NAME).setString(value);
if (http11) {
// Append if there is already a Connection header,
// else create the header
MessageBytes connectionHeaderValue = headers.getValue(Constants.CONNECTION);
if (connectionHeaderValue == null) {
headers.addValue(Constants.CONNECTION).setString(Constants.KEEP_ALIVE_HEADER_VALUE_TOKEN);
} else {
connectionHeaderValue.setString(
connectionHeaderValue.getString() + ", " + Constants.KEEP_ALIVE_HEADER_VALUE_TOKEN);
}
}
}
}
}
}
// Add server header
String server = protocol.getServer();
if (server == null) {
if (protocol.getServerRemoveAppProvidedValues()) {
headers.removeHeader("server");
}
} else {
// server always overrides anything the app might set
headers.setValue("Server").setString(server);
}
// Build the response header
try {
outputBuffer.sendStatus();
int size = headers.size();
for (int i = 0; i < size; i++) {
outputBuffer.sendHeader(headers.getName(i), headers.getValue(i));
}
outputBuffer.endHeaders();
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
// If something goes wrong, reset the header buffer so the error
// response can be written instead.
outputBuffer.resetHeaderBuffer();
throw t;
}
outputBuffer.commit();
}
private static boolean isConnectionToken(MimeHeaders headers, String token) throws IOException {
MessageBytes connection = headers.getValue(Constants.CONNECTION);
if (connection == null) {
return false;
}
Set<String> tokens = new HashSet<>();
TokenList.parseTokenList(headers.values(Constants.CONNECTION), tokens);
return tokens.contains(token);
}