org.apache.catalina.connector.CoyoteAdapter 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.catalina.connector;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.EnumSet;
import javax.servlet.SessionTrackingMode;
import org.apache.catalina.Context;
import org.apache.catalina.Globals;
import org.apache.catalina.Wrapper;
import org.apache.tomcat.util.res.StringManager;
import org.apache.catalina.comet.CometEvent;
import org.apache.catalina.core.ApplicationSessionCookieConfig;
import org.apache.catalina.core.AsyncContextImpl;
import org.apache.catalina.util.ServerInfo;
import org.apache.catalina.util.URLEncoder;
import org.apache.coyote.ActionCode;
import org.apache.coyote.Adapter;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.B2CConverter;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.CharChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.Cookies;
import org.apache.tomcat.util.http.ServerCookie;
import org.apache.tomcat.util.net.SSLSupport;
import org.apache.tomcat.util.net.SocketStatus;
/**
* Implementation of a request processor which delegates the processing to a
* Coyote processor.
*
* @author Craig R. McClanahan
* @author Remy Maucherat
* @version $Id: CoyoteAdapter.java 951447 2010-06-04 15:36:04Z markt $
*/
public class CoyoteAdapter implements Adapter {
private static final Log log = LogFactory.getLog(CoyoteAdapter.class);
// -------------------------------------------------------------- Constants
private static final String POWERED_BY = "Servlet/3.0 JSP/2.2 " +
"(" + ServerInfo.getServerInfo() + " Java/" +
System.getProperty("java.vm.vendor") + "/" +
System.getProperty("java.runtime.version") + ")";
private static final EnumSet SSL_ONLY =
EnumSet.of(SessionTrackingMode.SSL);
public static final int ADAPTER_NOTES = 1;
protected static final boolean ALLOW_BACKSLASH =
Boolean.valueOf(System.getProperty("org.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH", "false")).booleanValue();
// ----------------------------------------------------------- Constructors
/**
* Construct a new CoyoteProcessor associated with the specified connector.
*
* @param connector CoyoteConnector that owns this processor
*/
public CoyoteAdapter(Connector connector) {
super();
this.connector = connector;
}
// ----------------------------------------------------- Instance Variables
/**
* The CoyoteConnector with which this processor is associated.
*/
private Connector connector = null;
/**
* The string manager for this package.
*/
protected static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* Encoder for the Location URL in HTTP redirects.
*/
protected static URLEncoder urlEncoder;
// ----------------------------------------------------- Static Initializer
/**
* The safe character set.
*/
static {
urlEncoder = new URLEncoder();
urlEncoder.addSafeCharacter('-');
urlEncoder.addSafeCharacter('_');
urlEncoder.addSafeCharacter('.');
urlEncoder.addSafeCharacter('*');
urlEncoder.addSafeCharacter('/');
}
// -------------------------------------------------------- Adapter Methods
/**
* Event method.
*
* @return false to indicate an error, expected or not
*/
public boolean event(org.apache.coyote.Request req,
org.apache.coyote.Response res, SocketStatus status) {
Request request = (Request) req.getNote(ADAPTER_NOTES);
Response response = (Response) res.getNote(ADAPTER_NOTES);
if (request.getWrapper() == null) {
return false;
}
boolean error = false;
boolean read = false;
try {
if (status == SocketStatus.OPEN) {
if (response.isClosed()) {
// The event has been closed asynchronously, so call end instead of
// read to cleanup the pipeline
request.getEvent().setEventType(CometEvent.EventType.END);
request.getEvent().setEventSubType(null);
} else {
try {
// Fill the read buffer of the servlet layer
if (request.read()) {
read = true;
}
} catch (IOException e) {
error = true;
}
if (read) {
request.getEvent().setEventType(CometEvent.EventType.READ);
request.getEvent().setEventSubType(null);
} else if (error) {
request.getEvent().setEventType(CometEvent.EventType.ERROR);
request.getEvent().setEventSubType(CometEvent.EventSubType.CLIENT_DISCONNECT);
} else {
request.getEvent().setEventType(CometEvent.EventType.END);
request.getEvent().setEventSubType(null);
}
}
} else if (status == SocketStatus.DISCONNECT) {
request.getEvent().setEventType(CometEvent.EventType.ERROR);
request.getEvent().setEventSubType(CometEvent.EventSubType.CLIENT_DISCONNECT);
error = true;
} else if (status == SocketStatus.ERROR) {
request.getEvent().setEventType(CometEvent.EventType.ERROR);
request.getEvent().setEventSubType(CometEvent.EventSubType.IOEXCEPTION);
error = true;
} else if (status == SocketStatus.STOP) {
request.getEvent().setEventType(CometEvent.EventType.END);
request.getEvent().setEventSubType(CometEvent.EventSubType.SERVER_SHUTDOWN);
} else if (status == SocketStatus.TIMEOUT) {
if (response.isClosed()) {
// The event has been closed asynchronously, so call end instead of
// read to cleanup the pipeline
request.getEvent().setEventType(CometEvent.EventType.END);
request.getEvent().setEventSubType(null);
} else {
request.getEvent().setEventType(CometEvent.EventType.ERROR);
request.getEvent().setEventSubType(CometEvent.EventSubType.TIMEOUT);
}
}
req.getRequestProcessor().setWorkerThreadName(Thread.currentThread().getName());
// Calling the container
connector.getService().getContainer().getPipeline().getFirst().event(request, response, request.getEvent());
if (!error && !response.isClosed() && (request.getAttribute(Globals.EXCEPTION_ATTR) != null)) {
// An unexpected exception occurred while processing the event, so
// error should be called
request.getEvent().setEventType(CometEvent.EventType.ERROR);
request.getEvent().setEventSubType(null);
error = true;
connector.getService().getContainer().getPipeline().getFirst().event(request, response, request.getEvent());
}
if (response.isClosed() || !request.isComet()) {
if (status==SocketStatus.OPEN) {
//CometEvent.close was called during an event.
request.getEvent().setEventType(CometEvent.EventType.END);
request.getEvent().setEventSubType(null);
error = true;
connector.getService().getContainer().getPipeline().getFirst().event(request, response, request.getEvent());
}
res.action(ActionCode.ACTION_COMET_END, null);
} else if (!error && read && request.getAvailable()) {
// If this was a read and not all bytes have been read, or if no data
// was read from the connector, then it is an error
request.getEvent().setEventType(CometEvent.EventType.ERROR);
request.getEvent().setEventSubType(CometEvent.EventSubType.IOEXCEPTION);
error = true;
connector.getService().getContainer().getPipeline().getFirst().event(request, response, request.getEvent());
}
return (!error);
} catch (Throwable t) {
if (!(t instanceof IOException)) {
log.error(sm.getString("coyoteAdapter.service"), t);
}
error = true;
return false;
} finally {
req.getRequestProcessor().setWorkerThreadName(null);
// Recycle the wrapper request and response
if (error || response.isClosed() || !request.isComet()) {
request.recycle();
request.setFilterChain(null);
response.recycle();
}
}
}
public boolean asyncDispatch(org.apache.coyote.Request req,org.apache.coyote.Response res, SocketStatus status) throws Exception {
Request request = (Request) req.getNote(ADAPTER_NOTES);
Response response = (Response) res.getNote(ADAPTER_NOTES);
if (request == null) {
throw new IllegalStateException("Dispatch may only happen on an existing request.");
}
boolean comet = false;
boolean async = false;
boolean success = true;
try {
if (status==SocketStatus.TIMEOUT) {
AsyncContextImpl asyncConImpl = (AsyncContextImpl)request.getAsyncContext();
//TODO SERVLET3 - async
//configure settings for timed out
asyncConImpl.setTimeoutState();
}
if (status==SocketStatus.ERROR || status==SocketStatus.STOP || status==SocketStatus.DISCONNECT) {
AsyncContextImpl asyncConImpl = (AsyncContextImpl)request.getAsyncContext();
//TODO SERVLET3 - async
//configure settings for timed out
asyncConImpl.setErrorState(new IOException("Socket error."));
}
while (success) {
AsyncContextImpl impl = (AsyncContextImpl)request.getAsyncContext();
// Calling the container
if (impl.getState()==AsyncContextImpl.AsyncState.DISPATCHED) {
// Calling the container
try {
impl.complete();
connector.getService().getContainer().getPipeline().getFirst().invoke(request, response);
} finally {
success = false;
}
} else if (impl.getState()==AsyncContextImpl.AsyncState.STARTED){
//TODO SERVLET3 - async
res.action(ActionCode.ACTION_ASYNC_START, request.getAsyncContext());
async = true;
break;
} else if (impl.getState()==AsyncContextImpl.AsyncState.NOT_STARTED){
//TODO SERVLET3 - async
async = false;
break;
} else if (impl.getState()==AsyncContextImpl.AsyncState.ERROR_DISPATCHING) {
async = false;
success = false;
connector.getService().getContainer().getPipeline().getFirst().invoke(request, response);
} else {
try {
connector.getService().getContainer().getPipeline().getFirst().invoke(request, response);
} catch (RuntimeException x) {
impl.setErrorState(x);
}
}
}
if (request.isComet()) {
if (!response.isClosed() && !response.isError()) {
if (request.getAvailable() || (request.getContentLength() > 0 && (!request.isParametersParsed()))) {
// Invoke a read event right away if there are available bytes
if (event(req, res, SocketStatus.OPEN)) {
comet = true;
res.action(ActionCode.ACTION_COMET_BEGIN, null);
}
} else {
comet = true;
res.action(ActionCode.ACTION_COMET_BEGIN, null);
}
} else {
// Clear the filter chain, as otherwise it will not be reset elsewhere
// since this is a Comet request
request.setFilterChain(null);
}
}
if (!async && !comet) {
response.finishResponse();
req.action(ActionCode.ACTION_POST_REQUEST , null);
}
} catch (IOException e) {
success = false;
// Ignore
} catch (Throwable t) {
success = false;
log.error(sm.getString("coyoteAdapter.service"), t);
} finally {
req.getRequestProcessor().setWorkerThreadName(null);
// Recycle the wrapper request and response
if (!success || (!comet && !async)) {
request.recycle();
response.recycle();
} else {
// Clear converters so that the minimum amount of memory
// is used by this processor
request.clearEncoders();
response.clearEncoders();
}
}
return success;
}
/**
* Service method.
*/
public void service(org.apache.coyote.Request req,
org.apache.coyote.Response res)
throws Exception {
Request request = (Request) req.getNote(ADAPTER_NOTES);
Response response = (Response) res.getNote(ADAPTER_NOTES);
if (request == null) {
// Create objects
request = connector.createRequest();
request.setCoyoteRequest(req);
response = connector.createResponse();
response.setCoyoteResponse(res);
// Link objects
request.setResponse(response);
response.setRequest(request);
// Set as notes
req.setNote(ADAPTER_NOTES, request);
res.setNote(ADAPTER_NOTES, response);
// Set query string encoding
req.getParameters().setQueryStringEncoding
(connector.getURIEncoding());
}
if (connector.getXpoweredBy()) {
response.addHeader("X-Powered-By", POWERED_BY);
}
boolean comet = false;
boolean async = false;
try {
// Parse and set Catalina and configuration specific
// request parameters
req.getRequestProcessor().setWorkerThreadName(Thread.currentThread().getName());
if (postParseRequest(req, request, res, response)) {
//check valves if we support async
request.setAsyncSupported(connector.getService().getContainer().getPipeline().isAsyncSupported());
// Calling the container
connector.getService().getContainer().getPipeline().getFirst().invoke(request, response);
if (request.isComet()) {
if (!response.isClosed() && !response.isError()) {
if (request.getAvailable() || (request.getContentLength() > 0 && (!request.isParametersParsed()))) {
// Invoke a read event right away if there are available bytes
if (event(req, res, SocketStatus.OPEN)) {
comet = true;
res.action(ActionCode.ACTION_COMET_BEGIN, null);
}
} else {
comet = true;
res.action(ActionCode.ACTION_COMET_BEGIN, null);
}
} else {
// Clear the filter chain, as otherwise it will not be reset elsewhere
// since this is a Comet request
request.setFilterChain(null);
}
}
}
AsyncContextImpl asyncConImpl = (AsyncContextImpl)request.getAsyncContext();
if (asyncConImpl!=null && asyncConImpl.getState()==AsyncContextImpl.AsyncState.STARTED) {
res.action(ActionCode.ACTION_ASYNC_START, request.getAsyncContext());
async = true;
} else if (request.isAsyncDispatching()) {
asyncDispatch(req, res, SocketStatus.OPEN);
if (request.isAsyncStarted()) {
async = true;
res.action(ActionCode.ACTION_ASYNC_START, request.getAsyncContext());
}
} else if (!comet) {
response.finishResponse();
req.action(ActionCode.ACTION_POST_REQUEST , null);
}
} catch (IOException e) {
// Ignore
} catch (Throwable t) {
log.error(sm.getString("coyoteAdapter.service"), t);
} finally {
req.getRequestProcessor().setWorkerThreadName(null);
// Recycle the wrapper request and response
if (!comet && !async) {
request.recycle();
response.recycle();
} else {
// Clear converters so that the minimum amount of memory
// is used by this processor
request.clearEncoders();
response.clearEncoders();
}
}
}
public void log(org.apache.coyote.Request req,
org.apache.coyote.Response res, long time) {
Request request = (Request) req.getNote(ADAPTER_NOTES);
Response response = (Response) res.getNote(ADAPTER_NOTES);
if (request == null) {
// Create objects
request = connector.createRequest();
request.setCoyoteRequest(req);
response = connector.createResponse();
response.setCoyoteResponse(res);
// Link objects
request.setResponse(response);
response.setRequest(request);
// Set as notes
req.setNote(ADAPTER_NOTES, request);
res.setNote(ADAPTER_NOTES, response);
// Set query string encoding
req.getParameters().setQueryStringEncoding
(connector.getURIEncoding());
}
connector.getService().getContainer().logAccess(
request, response, time, true);
request.recycle();
response.recycle();
}
// ------------------------------------------------------ Protected Methods
/**
* Parse additional request parameters.
*/
protected boolean postParseRequest(org.apache.coyote.Request req,
Request request,
org.apache.coyote.Response res,
Response response)
throws Exception {
// XXX the processor may have set a correct scheme and port prior to this point,
// in ajp13 protocols dont make sense to get the port from the connector...
// otherwise, use connector configuration
if (! req.scheme().isNull()) {
// use processor specified scheme to determine secure state
request.setSecure(req.scheme().equals("https"));
} else {
// use connector scheme and secure configuration, (defaults to
// "http" and false respectively)
req.scheme().setString(connector.getScheme());
request.setSecure(connector.getSecure());
}
// FIXME: the code below doesnt belongs to here,
// this is only have sense
// in Http11, not in ajp13..
// At this point the Host header has been processed.
// Override if the proxyPort/proxyHost are set
String proxyName = connector.getProxyName();
int proxyPort = connector.getProxyPort();
if (proxyPort != 0) {
req.setServerPort(proxyPort);
}
if (proxyName != null) {
req.serverName().setString(proxyName);
}
// Copy the raw URI to the decodedURI
MessageBytes decodedURI = req.decodedURI();
decodedURI.duplicate(req.requestURI());
// Parse the path parameters. This will:
// - strip out the path parameters
// - convert the decodedURI to bytes
parsePathParameters(req, request);
// URI decoding
// %xx decoding of the URL
try {
req.getURLDecoder().convert(decodedURI, false);
} catch (IOException ioe) {
res.setStatus(400);
res.setMessage("Invalid URI: " + ioe.getMessage());
connector.getService().getContainer().logAccess(
request, response, 0, true);
return false;
}
// Normalization
if (!normalize(req.decodedURI())) {
res.setStatus(400);
res.setMessage("Invalid URI");
connector.getService().getContainer().logAccess(
request, response, 0, true);
return false;
}
// Character decoding
convertURI(decodedURI, request);
// Check that the URI is still normalized
if (!checkNormalize(req.decodedURI())) {
res.setStatus(400);
res.setMessage("Invalid URI character encoding");
connector.getService().getContainer().logAccess(
request, response, 0, true);
return false;
}
// Set the remote principal
String principal = req.getRemoteUser().toString();
if (principal != null) {
request.setUserPrincipal(new CoyotePrincipal(principal));
}
// Set the authorization type
String authtype = req.getAuthType().toString();
if (authtype != null) {
request.setAuthType(authtype);
}
// Request mapping.
MessageBytes serverName;
if (connector.getUseIPVHosts()) {
serverName = req.localName();
if (serverName.isNull()) {
// well, they did ask for it
res.action(ActionCode.ACTION_REQ_LOCAL_NAME_ATTRIBUTE, null);
}
} else {
serverName = req.serverName();
}
if (request.isAsyncStarted()) {
//TODO SERVLET3 - async
//reset mapping data, should prolly be done elsewhere
request.getMappingData().recycle();
}
connector.getMapper().map(serverName, decodedURI,
request.getMappingData());
request.setContext((Context) request.getMappingData().context);
request.setWrapper((Wrapper) request.getMappingData().wrapper);
// Filter trace method
if (!connector.getAllowTrace()
&& req.method().equalsIgnoreCase("TRACE")) {
Wrapper wrapper = request.getWrapper();
String header = null;
if (wrapper != null) {
String[] methods = wrapper.getServletMethods();
if (methods != null) {
for (int i=0; i -1) {
// Parse path param, and extract it from the decoded request URI
int start = uriBC.getStart();
int end = uriBC.getEnd();
int pathParamStart = semicolon + 1;
int pathParamEnd = ByteChunk.findBytes(uriBC.getBuffer(),
uriBC.getStart() + pathParamStart, uriBC.getEnd(),
new byte[] {';', '/'});
String pv = null;
boolean warnedEncoding = false;
if (pathParamEnd >= 0) {
try {
pv = (new String(uriBC.getBuffer(), start + pathParamStart,
pathParamEnd - pathParamStart, enc));
} catch (UnsupportedEncodingException e) {
if (!warnedEncoding) {
log.warn(sm.getString("coyoteAdapter.parsePathParam",
enc));
warnedEncoding = true;
}
}
// Extract path param from decoded request URI
byte[] buf = uriBC.getBuffer();
for (int i = 0; i < end - start - pathParamEnd; i++) {
buf[start + semicolon + i]
= buf[start + i + pathParamEnd];
}
uriBC.setBytes(buf, start,
end - start - pathParamEnd + semicolon);
} else {
try {
pv = (new String(uriBC.getBuffer(), start + pathParamStart,
(end - start) - pathParamStart, enc));
} catch (UnsupportedEncodingException e) {
if (!warnedEncoding) {
log.warn(sm.getString("coyoteAdapter.parsePathParam",
enc));
warnedEncoding = true;
}
}
uriBC.setEnd(start + semicolon);
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "pathParamStart",
Integer.valueOf(pathParamStart)));
log.debug(sm.getString("coyoteAdapter.debug", "pathParamEnd",
Integer.valueOf(pathParamEnd)));
log.debug(sm.getString("coyoteAdapter.debug", "pv", pv));
}
if (pv != null) {
int equals = pv.indexOf('=');
if (equals > -1) {
String name = pv.substring(0, equals);
String value = pv.substring(equals + 1);
request.addPathParameter(name, value);
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "equals",
Integer.valueOf(equals)));
log.debug(sm.getString("coyoteAdapter.debug", "name",
name));
log.debug(sm.getString("coyoteAdapter.debug", "value",
value));
}
}
}
semicolon = uriBC.indexOf(';', semicolon);
}
}
/**
* Look for SSL session ID if required. Only look for SSL Session ID if it
* is the only tracking method enabled.
*/
protected void parseSessionSslId(Request request) {
if (request.getRequestedSessionId() == null &&
SSL_ONLY.equals(request.getServletContext()
.getEffectiveSessionTrackingModes()) &&
request.connector.secure) {
// TODO Is there a better way to map SSL sessions to our sesison ID?
// TODO The request.getAttribute() will cause a number of other SSL
// attribute to be populated. Is this a performance concern?
request.setRequestedSessionId(
request.getAttribute(SSLSupport.SESSION_ID_KEY).toString());
request.setRequestedSessionSSL(true);
}
}
/**
* Parse session id in URL.
*/
protected void parseSessionCookiesId(org.apache.coyote.Request req, Request request) {
// If session tracking via cookies has been disabled for the current
// context, don't go looking for a session ID in a cookie as a cookie
// from a parent context with a session ID may be present which would
// overwrite the valid session ID encoded in the URL
Context context = (Context) request.getMappingData().context;
if (context != null && !context.getServletContext()
.getEffectiveSessionTrackingModes().contains(
SessionTrackingMode.COOKIE))
return;
// Parse session id from cookies
Cookies serverCookies = req.getCookies();
int count = serverCookies.getCookieCount();
if (count <= 0)
return;
String sessionCookieName =
ApplicationSessionCookieConfig.getSessionCookieName(context);
for (int i = 0; i < count; i++) {
ServerCookie scookie = serverCookies.getCookie(i);
if (scookie.getName().equals(sessionCookieName)) {
// Override anything requested in the URL
if (!request.isRequestedSessionIdFromCookie()) {
// Accept only the first session id cookie
convertMB(scookie.getValue());
request.setRequestedSessionId
(scookie.getValue().toString());
request.setRequestedSessionCookie(true);
request.setRequestedSessionURL(false);
if (log.isDebugEnabled())
log.debug(" Requested cookie session id is " +
request.getRequestedSessionId());
} else {
if (!request.isRequestedSessionIdValid()) {
// Replace the session id until one is valid
convertMB(scookie.getValue());
request.setRequestedSessionId
(scookie.getValue().toString());
}
}
}
}
}
/**
* Character conversion of the URI.
*/
protected void convertURI(MessageBytes uri, Request request)
throws Exception {
ByteChunk bc = uri.getByteChunk();
int length = bc.getLength();
CharChunk cc = uri.getCharChunk();
cc.allocate(length, -1);
String enc = connector.getURIEncoding();
if (enc != null) {
B2CConverter conv = request.getURIConverter();
try {
if (conv == null) {
conv = new B2CConverter(enc);
request.setURIConverter(conv);
}
} catch (IOException e) {
// Ignore
log.error("Invalid URI encoding; using HTTP default");
connector.setURIEncoding(null);
}
if (conv != null) {
try {
conv.convert(bc, cc, cc.getBuffer().length - cc.getEnd());
uri.setChars(cc.getBuffer(), cc.getStart(),
cc.getLength());
return;
} catch (IOException e) {
log.error("Invalid URI character encoding; trying ascii");
cc.recycle();
}
}
}
// Default encoding: fast conversion
byte[] bbuf = bc.getBuffer();
char[] cbuf = cc.getBuffer();
int start = bc.getStart();
for (int i = 0; i < length; i++) {
cbuf[i] = (char) (bbuf[i + start] & 0xff);
}
uri.setChars(cbuf, 0, length);
}
/**
* Character conversion of the a US-ASCII MessageBytes.
*/
protected void convertMB(MessageBytes mb) {
// This is of course only meaningful for bytes
if (mb.getType() != MessageBytes.T_BYTES)
return;
ByteChunk bc = mb.getByteChunk();
CharChunk cc = mb.getCharChunk();
int length = bc.getLength();
cc.allocate(length, -1);
// Default encoding: fast conversion
byte[] bbuf = bc.getBuffer();
char[] cbuf = cc.getBuffer();
int start = bc.getStart();
for (int i = 0; i < length; i++) {
cbuf[i] = (char) (bbuf[i + start] & 0xff);
}
mb.setChars(cbuf, 0, length);
}
/**
* Normalize URI.
*
* This method normalizes "\", "//", "/./" and "/../". This method will
* return false when trying to go above the root, or if the URI contains
* a null byte.
*
* @param uriMB URI to be normalized
*/
public static boolean normalize(MessageBytes uriMB) {
ByteChunk uriBC = uriMB.getByteChunk();
final byte[] b = uriBC.getBytes();
final int start = uriBC.getStart();
int end = uriBC.getEnd();
// An empty URL is not acceptable
if (start == end)
return false;
// URL * is acceptable
if ((end - start == 1) && b[start] == (byte) '*')
return true;
int pos = 0;
int index = 0;
// Replace '\' with '/'
// Check for null byte
for (pos = start; pos < end; pos++) {
if (b[pos] == (byte) '\\') {
if (ALLOW_BACKSLASH) {
b[pos] = (byte) '/';
} else {
return false;
}
}
if (b[pos] == (byte) 0) {
return false;
}
}
// The URL must start with '/'
if (b[start] != (byte) '/') {
return false;
}
// Replace "//" with "/"
for (pos = start; pos < (end - 1); pos++) {
if (b[pos] == (byte) '/') {
while ((pos + 1 < end) && (b[pos + 1] == (byte) '/')) {
copyBytes(b, pos, pos + 1, end - pos - 1);
end--;
}
}
}
// If the URI ends with "/." or "/..", then we append an extra "/"
// Note: It is possible to extend the URI by 1 without any side effect
// as the next character is a non-significant WS.
if (((end - start) >= 2) && (b[end - 1] == (byte) '.')) {
if ((b[end - 2] == (byte) '/')
|| ((b[end - 2] == (byte) '.')
&& (b[end - 3] == (byte) '/'))) {
b[end] = (byte) '/';
end++;
}
}
uriBC.setEnd(end);
index = 0;
// Resolve occurrences of "/./" in the normalized path
while (true) {
index = uriBC.indexOf("/./", 0, 3, index);
if (index < 0)
break;
copyBytes(b, start + index, start + index + 2,
end - start - index - 2);
end = end - 2;
uriBC.setEnd(end);
}
index = 0;
// Resolve occurrences of "/../" in the normalized path
while (true) {
index = uriBC.indexOf("/../", 0, 4, index);
if (index < 0)
break;
// Prevent from going outside our context
if (index == 0)
return false;
int index2 = -1;
for (pos = start + index - 1; (pos >= 0) && (index2 < 0); pos --) {
if (b[pos] == (byte) '/') {
index2 = pos;
}
}
copyBytes(b, start + index2, start + index + 3,
end - start - index - 3);
end = end + index2 - index - 3;
uriBC.setEnd(end);
index = index2;
}
return true;
}
/**
* Check that the URI is normalized following character decoding.
*
* This method checks for "\", 0, "//", "/./" and "/../". This method will
* return false if sequences that are supposed to be normalized are still
* present in the URI.
*
* @param uriMB URI to be checked (should be chars)
*/
public static boolean checkNormalize(MessageBytes uriMB) {
CharChunk uriCC = uriMB.getCharChunk();
char[] c = uriCC.getChars();
int start = uriCC.getStart();
int end = uriCC.getEnd();
int pos = 0;
// Check for '\' and 0
for (pos = start; pos < end; pos++) {
if (c[pos] == '\\') {
return false;
}
if (c[pos] == 0) {
return false;
}
}
// Check for "//"
for (pos = start; pos < (end - 1); pos++) {
if (c[pos] == '/') {
if (c[pos + 1] == '/') {
return false;
}
}
}
// Check for ending with "/." or "/.."
if (((end - start) >= 2) && (c[end - 1] == '.')) {
if ((c[end - 2] == '/')
|| ((c[end - 2] == '.')
&& (c[end - 3] == '/'))) {
return false;
}
}
// Check for "/./"
if (uriCC.indexOf("/./", 0, 3, 0) >= 0) {
return false;
}
// Check for "/../"
if (uriCC.indexOf("/../", 0, 4, 0) >= 0) {
return false;
}
return true;
}
// ------------------------------------------------------ Protected Methods
/**
* Copy an array of bytes to a different position. Used during
* normalization.
*/
protected static void copyBytes(byte[] b, int dest, int src, int len) {
for (int pos = 0; pos < len; pos++) {
b[pos + dest] = b[pos + src];
}
}
}