/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* Licensed 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.tomcat5;
import java.io.IOException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import org.apache.catalina.Context;
import org.apache.catalina.Globals;
import org.apache.catalina.Wrapper;
import org.apache.catalina.util.StringManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.coyote.ActionCode;
import org.apache.coyote.Adapter;
import org.apache.coyote.Request;
import org.apache.coyote.Response;
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;
/**
* Implementation of a request processor which delegates the processing to a
* Coyote processor.
*
* @author Craig R. McClanahan
* @author Remy Maucherat
* @version $Revision: 1.20 $ $Date: 2004/03/18 23:51:47 $
*/
final class CoyoteAdapter
implements Adapter
{
private static Log log = LogFactory.getLog(CoyoteAdapter.class);
// -------------------------------------------------------------- Constants
public static final int ADAPTER_NOTES = 1;
// ----------------------------------------------------------- Constructors
/**
* Construct a new CoyoteProcessor associated with the specified connector.
*
* @param connector CoyoteConnector that owns this processor
* @param id Identifier of this CoyoteProcessor (unique per connector)
*/
public CoyoteAdapter(CoyoteConnector connector) {
super();
this.connector = connector;
this.debug = connector.getDebug();
}
// ----------------------------------------------------- Instance Variables
/**
* The CoyoteConnector with which this processor is associated.
*/
private CoyoteConnector connector = null;
/**
* The debugging detail level for this component.
*/
private int debug = 0;
/**
* The match string for identifying a session ID parameter.
*/
private static final String match =
";" + Globals.SESSION_PARAMETER_NAME + "=";
/**
* The match string for identifying a session ID parameter.
*/
private static final char[] SESSION_ID = match.toCharArray();
/**
* The string manager for this package.
*/
protected StringManager sm =
StringManager.getManager(Constants.Package);
// -------------------------------------------------------- Adapter Methods
/**
* Service method.
*/
public void service(Request req, Response res)
throws Exception {
CoyoteRequest request = (CoyoteRequest) req.getNote(ADAPTER_NOTES);
CoyoteResponse response = (CoyoteResponse) res.getNote(ADAPTER_NOTES);
if (request == null) {
// Create objects
request = (CoyoteRequest) connector.createRequest();
request.setCoyoteRequest(req);
response = (CoyoteResponse) 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.isXpoweredBy()) {
response.addHeader("X-Powered-By", "Servlet/2.4");
}
try {
// Parse and set Catalina and configuration specific
// request parameters
if ( postParseRequest(req, request, res, response) ) {
// Calling the container
connector.getContainer().invoke(request, response);
}
response.finishResponse();
req.action( ActionCode.ACTION_POST_REQUEST , null);
} catch (IOException e) {
;
} catch (Throwable t) {
log.error(sm.getString("coyoteAdapter.service"), t);
} finally {
// Recycle the wrapper request and response
request.recycle();
response.recycle();
}
}
// ------------------------------------------------------ Protected Methods
/**
* Parse additional request parameters.
*/
protected boolean postParseRequest(Request req, CoyoteRequest request,
Response res, CoyoteResponse response)
throws Exception {
// XXX the processor needs to set a correct scheme and port prior to this point,
// in ajp13 protocols dont make sense to get the port from the connector..
// 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());
}
// Filter trace method
if (!connector.getAllowTrace()
&& req.method().equalsIgnoreCase("TRACE")) {
res.setStatus(403);
res.setMessage("TRACE method is not allowed");
return false;
}
// 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);
}
// URI decoding
MessageBytes decodedURI = req.decodedURI();
decodedURI.duplicate(req.requestURI());
try {
req.getURLDecoder().convert(decodedURI, false);
} catch (IOException ioe) {
res.setStatus(400);
res.setMessage("Invalid URI");
throw ioe;
}
// Normalize decoded URI
if (!normalize(req.decodedURI())) {
res.setStatus(400);
res.setMessage("Invalid URI");
return false;
}
// Set the remote principal
String principal = req.getRemoteUser().toString();
if (principal != null) {
request.setUserPrincipal(new CoyotePrincipal(principal));
}
// URI character decoding
convertURI(decodedURI, request);
// Parse session Id
parseSessionId(req, request);
// Remove any remaining parameters (other than session id, which has
// already been removed in parseSessionId()) from the URI, so they
// won't be considered by the mapping algorithm.
CharChunk uriCC = decodedURI.getCharChunk();
int semicolon = uriCC.indexOf(';');
if (semicolon > 0) {
decodedURI.setChars
(uriCC.getBuffer(), uriCC.getStart(), semicolon);
}
// Request mapping.
connector.getMapper().map(req.serverName(), decodedURI,
request.getMappingData());
request.setContext((Context) request.getMappingData().context);
request.setWrapper((Wrapper) request.getMappingData().wrapper);
// Possible redirect
MessageBytes redirectPathMB = request.getMappingData().redirectPath;
if (!redirectPathMB.isNull()) {
String redirectPath = redirectPathMB.toString();
String query = request.getQueryString();
if (query != null) {
// This is not optimal, but as this is not very common, it
// shouldn't matter
redirectPath = redirectPath + "?" + query;
}
response.sendRedirect(redirectPath);
return false;
}
// Parse cookies
parseCookies(req, request);
return true;
}
/**
* Parse session id in URL.
*/
protected void parseSessionId(Request req, CoyoteRequest request) {
CharChunk uriCC = req.decodedURI().getCharChunk();
int semicolon = uriCC.indexOf(match, 0, match.length(), 0);
if (semicolon > 0) {
// Parse session ID, and extract it from the decoded request URI
int start = uriCC.getStart();
int end = uriCC.getEnd();
int sessionIdStart = start + semicolon + match.length();
int semicolon2 = uriCC.indexOf(';', sessionIdStart);
if (semicolon2 >= 0) {
request.setRequestedSessionId
(new String(uriCC.getBuffer(), sessionIdStart,
semicolon2 - semicolon - match.length()));
} else {
request.setRequestedSessionId
(new String(uriCC.getBuffer(), sessionIdStart,
end - sessionIdStart));
}
request.setRequestedSessionURL(true);
// Extract session ID from request URI
ByteChunk uriBC = req.requestURI().getByteChunk();
start = uriBC.getStart();
end = uriBC.getEnd();
semicolon = uriBC.indexOf(match, 0, match.length(), 0);
if (semicolon > 0) {
sessionIdStart = start + semicolon;
semicolon2 = uriCC.indexOf
(';', start + semicolon + match.length());
uriBC.setEnd(start + semicolon);
byte[] buf = uriBC.getBuffer();
if (semicolon2 >= 0) {
for (int i = 0; i < end - start - semicolon2; i++) {
buf[start + semicolon + i]
= buf[start + i + semicolon2];
}
uriBC.setBytes(buf, start, semicolon
+ (end - start - semicolon2));
}
}
} else {
request.setRequestedSessionId(null);
request.setRequestedSessionURL(false);
}
}
/**
* Parse cookies.
*/
protected void parseCookies(Request req, CoyoteRequest request) {
Cookies serverCookies = req.getCookies();
int count = serverCookies.getCookieCount();
if (count <= 0)
return;
Cookie[] cookies = new Cookie[count];
int idx=0;
for (int i = 0; i < count; i++) {
ServerCookie scookie = serverCookies.getCookie(i);
if (scookie.getName().equals(Globals.SESSION_COOKIE_NAME)) {
// Override anything requested in the URL
if (!request.isRequestedSessionIdFromCookie()) {
// Accept only the first session id cookie
request.setRequestedSessionId
(scookie.getValue().toString());
request.setRequestedSessionCookie(true);
request.setRequestedSessionURL(false);
if (log.isDebugEnabled())
log.debug(" Requested cookie session id is " +
((HttpServletRequest) request.getRequest())
.getRequestedSessionId());
} else {
if (!request.isRequestedSessionIdValid()) {
// Replace the session id until one is valid
request.setRequestedSessionId
(scookie.getValue().toString());
}
}
}
try {
Cookie cookie = new Cookie(scookie.getName().toString(),
scookie.getValue().toString());
cookie.setPath(scookie.getPath().toString());
cookie.setVersion(scookie.getVersion());
String domain = scookie.getDomain().toString();
if (domain != null) {
cookie.setDomain(scookie.getDomain().toString());
}
cookies[idx++] = cookie;
} catch(IllegalArgumentException e) {
log.info("Bad Cookie: Name: " + scookie.getName()
+ " Value: " + scookie.getValue());
}
}
if( idx < count ) {
Cookie [] ncookies = new Cookie[idx];
System.arraycopy(cookies, 0, ncookies, 0, idx);
cookies = ncookies;
}
request.setCookies(cookies);
}
/**
* Character conversion of the URI.
*/
protected void convertURI(MessageBytes uri, CoyoteRequest request)
throws Exception {
ByteChunk bc = uri.getByteChunk();
CharChunk cc = uri.getCharChunk();
cc.allocate(bc.getLength(), -1);
String enc = connector.getURIEncoding();
if (enc != null) {
B2CConverter conv = request.getURIConverter();
try {
if (conv == null) {
conv = new B2CConverter(enc);
request.setURIConverter(conv);
} else {
conv.recycle();
}
} catch (IOException e) {
// Ignore
log.error("Invalid URI encoding; using HTTP default");
connector.setURIEncoding(null);
}
if (conv != null) {
try {
conv.convert(bc, cc);
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 < bc.getLength(); i++) {
cbuf[i] = (char) (bbuf[i + start] & 0xff);
}
uri.setChars(cbuf, 0, bc.getLength());
}
/**
* Normalize URI.
* <p>
* 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();
byte[] b = uriBC.getBytes();
int start = uriBC.getStart();
int end = uriBC.getEnd();
// 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) '\\')
b[pos] = (byte) '/';
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;
}
uriBC.setBytes(b, start, end);
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];
}
}
/**
* Log a message on the Logger associated with our Container (if any)
*
* @param message Message to be logged
*/
protected void log(String message) {
log.info( message );
}
/**
* Log a message on the Logger associated with our Container (if any)
*
* @param message Message to be logged
* @param throwable Associated exception
*/
protected void log(String message, Throwable throwable) {
log.error( message, throwable);
}
}