org.apache.catalina.valves.RemoteIpValve 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.valves;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Pattern;
import javax.servlet.ServletException;
import org.apache.catalina.AccessLog;
import org.apache.catalina.Globals;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.StringUtils;
import org.apache.tomcat.util.http.MimeHeaders;
import org.apache.tomcat.util.http.parser.Host;
/**
*
* Tomcat port of mod_remoteip, this valve
* replaces the apparent client remote IP address and hostname for the request with the IP address list presented by a
* proxy or a load balancer via a request headers (e.g. "X-Forwarded-For").
*
*
* Another feature of this valve is to replace the apparent scheme (http/https) and server port with the scheme
* presented by a proxy or a load balancer via a request header (e.g. "X-Forwarded-Proto").
*
*
* This valve proceeds as follows:
*
*
* If the incoming request.getRemoteAddr() matches the valve's list of internal or trusted proxies:
*
*
* - Loop on the comma delimited list of IPs and hostnames passed by the preceding load balancer or proxy in the given
* request's Http header named
$remoteIpHeader (default value x-forwarded-for). Values are
* processed in right-to-left order.
* - For each ip/host of the list:
*
* - if it matches the internal proxies list, the ip/host is swallowed
* - if it matches the trusted proxies list, the ip/host is added to the created proxies header
* - otherwise, the ip/host is declared to be the remote ip and looping is stopped.
*
*
* - If the request http header named
$protocolHeader (default value X-Forwarded-Proto)
* consists only of forwards that match protocolHeaderHttpsValue configuration parameter (default
* https) then request.isSecure = true, request.scheme = https and
* request.serverPort = 443. Note that 443 can be overwritten with the $httpsServerPort
* configuration parameter.
* - Mark the request with the attribute {@link Globals#REQUEST_FORWARDED_ATTRIBUTE} and value {@code Boolean.TRUE} to
* indicate that this request has been forwarded by one or more proxies.
*
*
* Configuration parameters
*
* RemoteIpValve property
* Description
* Equivalent mod_remoteip directive
* Format
* Default Value
*
*
* remoteIpHeader
* Name of the Http Header read by this valve that holds the list of traversed IP addresses starting from the
* requesting client
* RemoteIPHeader
* Compliant http header name
* x-forwarded-for
*
*
* internalProxies
* Regular expression that matches the IP addresses of internal proxies. If they appear in the
* remoteIpHeader value, they will be trusted and will not appear in the proxiesHeader
* value
* RemoteIPInternalProxy
* Regular expression (in the syntax supported by {@link java.util.regex.Pattern java.util.regex})
* 10\.\d{1,3}\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3}|
* 169\.254\.\d{1,3}\.\d{1,3}|127\.\d{1,3}\.\d{1,3}\.\d{1,3}|
* 100\.6[4-9]{1}\.\d{1,3}\.\d{1,3}|100\.[7-9]{1}\d{1}\.\d{1,3}\.\d{1,3}|
* 100\.1[0-1]{1}\d{1}\.\d{1,3}\.\d{1,3}|100\.12[0-7]{1}\.\d{1,3}\.\d{1,3}|
* 172\.1[6-9]{1}\.\d{1,3}\.\d{1,3}|172\.2[0-9]{1}\.\d{1,3}\.\d{1,3}| 172\.3[0-1]{1}\.\d{1,3}\.\d{1,3}|
* 0:0:0:0:0:0:0:1|::1
* By default, 10/8, 192.168/16, 169.254/16, 127/8, 100.64/10, 172.16/12, and ::1 are allowed.
*
*
* proxiesHeader
* Name of the http header created by this valve to hold the list of proxies that have been processed in the
* incoming remoteIpHeader
* proxiesHeader
* Compliant http header name
* x-forwarded-by
*
*
* trustedProxies
* Regular expression that matches the IP addresses of trusted proxies. If they appear in the
* remoteIpHeader value, they will be trusted and will appear in the proxiesHeader value
* RemoteIPTrustedProxy
* Regular expression (in the syntax supported by {@link java.util.regex.Pattern java.util.regex})
*
*
*
* protocolHeader
* Name of the http header read by this valve that holds the flag that this request
* N/A
* Compliant http header name like X-Forwarded-Proto, X-Forwarded-Ssl or
* Front-End-Https
* X-Forwarded-Proto
*
* protocolHeaderHttpsValue
* Value of the protocolHeader to indicate that it is an Https request
* N/A
* String like https or ON
* https
*
* httpServerPort
* Value returned by {@link javax.servlet.ServletRequest#getServerPort()} when the protocolHeader
* indicates http protocol
* N/A
* integer
* 80
*
*
* httpsServerPort
* Value returned by {@link javax.servlet.ServletRequest#getServerPort()} when the protocolHeader
* indicates https protocol
* N/A
* integer
* 443
*
*
*
* This Valve may be attached to any Container, depending on the granularity of the filtering you wish to perform.
*
*
* Regular expression vs. IP address blocks: mod_remoteip allows to use address blocks
* (e.g. 192.168/16) to configure RemoteIPInternalProxy and RemoteIPTrustedProxy
* ; as Tomcat doesn't have a library similar to apr_ipsubnet_test,
* RemoteIpValve uses regular expression to configure internalProxies and
* trustedProxies in the same fashion as {@link RequestFilterValve} does.
*
*
*
* Sample with internal proxies
*
*
* RemoteIpValve configuration:
*
*
* <Valve
* className="org.apache.catalina.valves.RemoteIpValve"
* internalProxies="192\.168\.0\.10|192\.168\.0\.11"
* remoteIpHeader="x-forwarded-for"
* proxiesHeader="x-forwarded-by"
* protocolHeader="x-forwarded-proto"
* />
*
* Request Values
*
* property
* Value Before RemoteIpValve
* Value After RemoteIpValve
*
*
* request.remoteAddr
* 192.168.0.10
* 140.211.11.130
*
*
* request.header['x-forwarded-for']
* 140.211.11.130, 192.168.0.10
* null
*
*
* request.header['x-forwarded-by']
* null
* null
*
*
* request.header['x-forwarded-proto']
* https
* https
*
*
* request.scheme
* http
* https
*
*
* request.secure
* false
* true
*
*
* request.serverPort
* 80
* 443
*
*
*
* Note : x-forwarded-by header is null because only internal proxies as been traversed by the request.
* x-forwarded-by is null because all the proxies are trusted or internal.
*
*
*
* Sample with trusted proxies
*
*
* RemoteIpValve configuration:
*
*
* <Valve
* className="org.apache.catalina.valves.RemoteIpValve"
* internalProxies="192\.168\.0\.10|192\.168\.0\.11"
* remoteIpHeader="x-forwarded-for"
* proxiesHeader="x-forwarded-by"
* trustedProxies="proxy1|proxy2"
* />
*
* Request Values
*
* property
* Value Before RemoteIpValve
* Value After RemoteIpValve
*
*
* request.remoteAddr
* 192.168.0.10
* 140.211.11.130
*
*
* request.header['x-forwarded-for']
* 140.211.11.130, proxy1, proxy2
* null
*
*
* request.header['x-forwarded-by']
* null
* proxy1, proxy2
*
*
*
* Note : proxy1 and proxy2 are both trusted proxies that come in x-forwarded-for
* header, they both are migrated in x-forwarded-by header. x-forwarded-by is null because all
* the proxies are trusted or internal.
*
*
*
* Sample with internal and trusted proxies
*
*
* RemoteIpValve configuration:
*
*
* <Valve
* className="org.apache.catalina.valves.RemoteIpValve"
* internalProxies="192\.168\.0\.10|192\.168\.0\.11"
* remoteIpHeader="x-forwarded-for"
* proxiesHeader="x-forwarded-by"
* trustedProxies="proxy1|proxy2"
* />
*
* Request Values
*
* property
* Value Before RemoteIpValve
* Value After RemoteIpValve
*
*
* request.remoteAddr
* 192.168.0.10
* 140.211.11.130
*
*
* request.header['x-forwarded-for']
* 140.211.11.130, proxy1, proxy2, 192.168.0.10
* null
*
*
* request.header['x-forwarded-by']
* null
* proxy1, proxy2
*
*
*
* Note : proxy1 and proxy2 are both trusted proxies that come in x-forwarded-for
* header, they both are migrated in x-forwarded-by header. As 192.168.0.10 is an internal
* proxy, it does not appear in x-forwarded-by. x-forwarded-by is null because all the proxies
* are trusted or internal.
*
*
*
* Sample with an untrusted proxy
*
*
* RemoteIpValve configuration:
*
*
* <Valve
* className="org.apache.catalina.valves.RemoteIpValve"
* internalProxies="192\.168\.0\.10|192\.168\.0\.11"
* remoteIpHeader="x-forwarded-for"
* proxiesHeader="x-forwarded-by"
* trustedProxies="proxy1|proxy2"
* />
*
* Request Values
*
* property
* Value Before RemoteIpValve
* Value After RemoteIpValve
*
*
* request.remoteAddr
* 192.168.0.10
* untrusted-proxy
*
*
* request.header['x-forwarded-for']
* 140.211.11.130, untrusted-proxy, proxy1
* 140.211.11.130
*
*
* request.header['x-forwarded-by']
* null
* proxy1
*
*
*
* Note : x-forwarded-by holds the trusted proxy proxy1. x-forwarded-by holds
* 140.211.11.130 because untrusted-proxy is not trusted and thus, we cannot trust that
* untrusted-proxy is the actual remote ip. request.remoteAddr is untrusted-proxy
* that is an IP verified by proxy1.
*
*/
public class RemoteIpValve extends ValveBase {
/**
* Logger
*/
private static final Log log = LogFactory.getLog(RemoteIpValve.class);
/**
* Convert a given comma delimited String into an array of String
*
* @param commaDelimitedStrings The string to convert
*
* @return array of String (non code})
*
* @deprecated Unused. Will be removed in Tomcat 11.
*/
@Deprecated
protected static String[] commaDelimitedListToStringArray(String commaDelimitedStrings) {
return StringUtils.splitCommaSeparated(commaDelimitedStrings);
}
/**
* Convert an array of strings in a comma delimited string
*
* @param stringList The string list to convert
*
* @return The concatenated string
*
* @deprecated Unused. This will be removed in Tomcat 10.1.x onwards. Use
* {@link StringUtils#join(java.util.Collection)} instead
*/
@Deprecated
protected static String listToCommaDelimitedString(List stringList) {
if (stringList == null) {
return "";
}
StringBuilder result = new StringBuilder();
for (Iterator it = stringList.iterator(); it.hasNext();) {
Object element = it.next();
if (element != null) {
result.append(element);
if (it.hasNext()) {
result.append(", ");
}
}
}
return result.toString();
}
private String hostHeader = null;
private boolean changeLocalName = false;
/**
* @see #setHttpServerPort(int)
*/
private int httpServerPort = 80;
/**
* @see #setHttpsServerPort(int)
*/
private int httpsServerPort = 443;
private String portHeader = null;
private boolean changeLocalPort = false;
/**
* @see #setInternalProxies(String)
*/
private Pattern internalProxies =
Pattern.compile("10\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|" + "192\\.168\\.\\d{1,3}\\.\\d{1,3}|" +
"169\\.254\\.\\d{1,3}\\.\\d{1,3}|" + "127\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}|" +
"100\\.6[4-9]{1}\\.\\d{1,3}\\.\\d{1,3}|" + "100\\.[7-9]{1}\\d{1}\\.\\d{1,3}\\.\\d{1,3}|" +
"100\\.1[0-1]{1}\\d{1}\\.\\d{1,3}\\.\\d{1,3}|" + "100\\.12[0-7]{1}\\.\\d{1,3}\\.\\d{1,3}|" +
"172\\.1[6-9]{1}\\.\\d{1,3}\\.\\d{1,3}|" + "172\\.2[0-9]{1}\\.\\d{1,3}\\.\\d{1,3}|" +
"172\\.3[0-1]{1}\\.\\d{1,3}\\.\\d{1,3}|" + "0:0:0:0:0:0:0:1|::1");
/**
* @see #setProtocolHeader(String)
*/
private String protocolHeader = "X-Forwarded-Proto";
/**
* @see #setProtocolHeaderHttpsValue(String)
*/
private String protocolHeaderHttpsValue = "https";
/**
* @see #setProxiesHeader(String)
*/
private String proxiesHeader = "X-Forwarded-By";
/**
* @see #setRemoteIpHeader(String)
*/
private String remoteIpHeader = "X-Forwarded-For";
/**
* @see #setRequestAttributesEnabled(boolean)
*/
private boolean requestAttributesEnabled = true;
/**
* @see RemoteIpValve#setTrustedProxies(String)
*/
private Pattern trustedProxies = null;
/**
* Default constructor that ensures {@link ValveBase#ValveBase(boolean)} is called with true.
*/
public RemoteIpValve() {
// Async requests are supported with this valve
super(true);
}
/**
* Obtain the name of the HTTP header used to override the value returned by {@link Request#getServerName()} and
* (optionally depending on {link {@link #isChangeLocalName()} {@link Request#getLocalName()}.
*
* @return The HTTP header name
*/
public String getHostHeader() {
return hostHeader;
}
/**
* Set the name of the HTTP header used to override the value returned by {@link Request#getServerName()} and
* (optionally depending on {link {@link #isChangeLocalName()} {@link Request#getLocalName()}.
*
* @param hostHeader The HTTP header name
*/
public void setHostHeader(String hostHeader) {
this.hostHeader = hostHeader;
}
public boolean isChangeLocalName() {
return changeLocalName;
}
public void setChangeLocalName(boolean changeLocalName) {
this.changeLocalName = changeLocalName;
}
public int getHttpServerPort() {
return httpServerPort;
}
public int getHttpsServerPort() {
return httpsServerPort;
}
/**
* Obtain the name of the HTTP header used to override the value returned by {@link Request#getServerPort()} and
* (optionally depending on {link {@link #isChangeLocalPort()} {@link Request#getLocalPort()}.
*
* @return The HTTP header name
*/
public String getPortHeader() {
return portHeader;
}
/**
* Set the name of the HTTP header used to override the value returned by {@link Request#getServerPort()} and
* (optionally depending on {link {@link #isChangeLocalPort()} {@link Request#getLocalPort()}.
*
* @param portHeader The HTTP header name
*/
public void setPortHeader(String portHeader) {
this.portHeader = portHeader;
}
public boolean isChangeLocalPort() {
return changeLocalPort;
}
public void setChangeLocalPort(boolean changeLocalPort) {
this.changeLocalPort = changeLocalPort;
}
/**
* @see #setInternalProxies(String)
*
* @return Regular expression that defines the internal proxies
*/
public String getInternalProxies() {
if (internalProxies == null) {
return null;
}
return internalProxies.toString();
}
/**
* @see #setProtocolHeader(String)
*
* @return the protocol header (e.g. "X-Forwarded-Proto")
*/
public String getProtocolHeader() {
return protocolHeader;
}
/**
* @see RemoteIpValve#setProtocolHeaderHttpsValue(String)
*
* @return the value of the protocol header for incoming https request (e.g. "https")
*/
public String getProtocolHeaderHttpsValue() {
return protocolHeaderHttpsValue;
}
/**
* @see #setProxiesHeader(String)
*
* @return the proxies header name (e.g. "X-Forwarded-By")
*/
public String getProxiesHeader() {
return proxiesHeader;
}
/**
* @see #setRemoteIpHeader(String)
*
* @return the remote IP header name (e.g. "X-Forwarded-For")
*/
public String getRemoteIpHeader() {
return remoteIpHeader;
}
/**
* @see #setRequestAttributesEnabled(boolean)
*
* @return true if the attributes will be logged, otherwise false
*/
public boolean getRequestAttributesEnabled() {
return requestAttributesEnabled;
}
/**
* @see #setTrustedProxies(String)
*
* @return Regular expression that defines the trusted proxies
*/
public String getTrustedProxies() {
if (trustedProxies == null) {
return null;
}
return trustedProxies.toString();
}
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {
final String originalRemoteAddr = request.getRemoteAddr();
final String originalRemoteHost = request.getRemoteHost();
final String originalScheme = request.getScheme();
final boolean originalSecure = request.isSecure();
final String originalServerName = request.getServerName();
final String originalLocalName = isChangeLocalName() ? request.getLocalName() : null;
final int originalServerPort = request.getServerPort();
final int originalLocalPort = request.getLocalPort();
final String originalProxiesHeader = request.getHeader(proxiesHeader);
final String originalRemoteIpHeader = request.getHeader(remoteIpHeader);
boolean isInternal = internalProxies != null && internalProxies.matcher(originalRemoteAddr).matches();
if (isInternal || (trustedProxies != null && trustedProxies.matcher(originalRemoteAddr).matches())) {
String remoteIp = null;
Deque proxiesHeaderValue = new ArrayDeque<>();
StringBuilder concatRemoteIpHeaderValue = new StringBuilder();
for (Enumeration e = request.getHeaders(remoteIpHeader); e.hasMoreElements();) {
if (concatRemoteIpHeaderValue.length() > 0) {
concatRemoteIpHeaderValue.append(", ");
}
concatRemoteIpHeaderValue.append(e.nextElement());
}
String[] remoteIpHeaderValue = StringUtils.splitCommaSeparated(concatRemoteIpHeaderValue.toString());
int idx;
if (!isInternal) {
proxiesHeaderValue.addFirst(originalRemoteAddr);
}
// loop on remoteIpHeaderValue to find the first trusted remote ip and to build the proxies chain
for (idx = remoteIpHeaderValue.length - 1; idx >= 0; idx--) {
String currentRemoteIp = remoteIpHeaderValue[idx];
remoteIp = currentRemoteIp;
if (internalProxies != null && internalProxies.matcher(currentRemoteIp).matches()) {
// do nothing, internalProxies IPs are not appended to the
} else if (trustedProxies != null && trustedProxies.matcher(currentRemoteIp).matches()) {
proxiesHeaderValue.addFirst(currentRemoteIp);
} else {
idx--; // decrement idx because break statement doesn't do it
break;
}
}
// continue to loop on remoteIpHeaderValue to build the new value of the remoteIpHeader
Deque newRemoteIpHeaderValue = new ArrayDeque<>();
for (; idx >= 0; idx--) {
String currentRemoteIp = remoteIpHeaderValue[idx];
newRemoteIpHeaderValue.addFirst(currentRemoteIp);
}
if (remoteIp != null) {
request.setRemoteAddr(remoteIp);
if (request.getConnector().getEnableLookups()) {
// This isn't a lazy lookup but that would be a little more
// invasive - mainly in Request.getRemoteHost() - and if
// enableLookups is true it seems reasonable that the
// hotsname will be required so look it up here.
try {
InetAddress inetAddress = InetAddress.getByName(remoteIp);
// We know we need a DNS look up so use getCanonicalHostName()
request.setRemoteHost(inetAddress.getCanonicalHostName());
} catch (UnknownHostException e) {
log.debug(sm.getString("remoteIpValve.invalidRemoteAddress", remoteIp), e);
request.setRemoteHost(remoteIp);
}
} else {
request.setRemoteHost(remoteIp);
}
if (proxiesHeaderValue.size() == 0) {
request.getCoyoteRequest().getMimeHeaders().removeHeader(proxiesHeader);
} else {
String commaDelimitedListOfProxies = StringUtils.join(proxiesHeaderValue);
request.getCoyoteRequest().getMimeHeaders().setValue(proxiesHeader)
.setString(commaDelimitedListOfProxies);
}
if (newRemoteIpHeaderValue.size() == 0) {
request.getCoyoteRequest().getMimeHeaders().removeHeader(remoteIpHeader);
} else {
String commaDelimitedRemoteIpHeaderValue = StringUtils.join(newRemoteIpHeaderValue);
request.getCoyoteRequest().getMimeHeaders().setValue(remoteIpHeader)
.setString(commaDelimitedRemoteIpHeaderValue);
}
}
if (protocolHeader != null) {
String protocolHeaderValue = request.getHeader(protocolHeader);
if (protocolHeaderValue == null) {
// Don't modify the secure, scheme and serverPort attributes
// of the request
} else if (isForwardedProtoHeaderValueSecure(protocolHeaderValue)) {
request.setSecure(true);
request.getCoyoteRequest().scheme().setString("https");
setPorts(request, httpsServerPort);
} else {
request.setSecure(false);
request.getCoyoteRequest().scheme().setString("http");
setPorts(request, httpServerPort);
}
}
if (hostHeader != null) {
String hostHeaderValue = request.getHeader(hostHeader);
if (hostHeaderValue != null) {
try {
int portIndex = Host.parse(hostHeaderValue);
if (portIndex > -1) {
log.debug(sm.getString("remoteIpValve.invalidHostWithPort", hostHeaderValue, hostHeader));
hostHeaderValue = hostHeaderValue.substring(0, portIndex);
}
request.getCoyoteRequest().serverName().setString(hostHeaderValue);
if (isChangeLocalName()) {
request.getCoyoteRequest().localName().setString(hostHeaderValue);
}
} catch (IllegalArgumentException iae) {
log.debug(sm.getString("remoteIpValve.invalidHostHeader", hostHeaderValue, hostHeader));
}
}
}
request.setAttribute(Globals.REQUEST_FORWARDED_ATTRIBUTE, Boolean.TRUE);
if (log.isTraceEnabled()) {
log.trace("Incoming request " + request.getRequestURI() + " with originalRemoteAddr [" +
originalRemoteAddr + "], originalRemoteHost=[" + originalRemoteHost + "], originalSecure=[" +
originalSecure + "], originalScheme=[" + originalScheme + "], originalServerName=[" +
originalServerName + "], originalServerPort=[" + originalServerPort +
"] will be seen as newRemoteAddr=[" + request.getRemoteAddr() + "], newRemoteHost=[" +
request.getRemoteHost() + "], newSecure=[" + request.isSecure() + "], newScheme=[" +
request.getScheme() + "], newServerName=[" + request.getServerName() + "], newServerPort=[" +
request.getServerPort() + "]");
}
} else {
if (log.isTraceEnabled()) {
log.trace("Skip RemoteIpValve for request " + request.getRequestURI() + " with originalRemoteAddr '" +
request.getRemoteAddr() + "'");
}
}
if (requestAttributesEnabled) {
request.setAttribute(AccessLog.REMOTE_ADDR_ATTRIBUTE, request.getRemoteAddr());
request.setAttribute(Globals.REMOTE_ADDR_ATTRIBUTE, request.getRemoteAddr());
request.setAttribute(AccessLog.REMOTE_HOST_ATTRIBUTE, request.getRemoteHost());
request.setAttribute(AccessLog.PROTOCOL_ATTRIBUTE, request.getProtocol());
request.setAttribute(AccessLog.SERVER_NAME_ATTRIBUTE, request.getServerName());
request.setAttribute(AccessLog.SERVER_PORT_ATTRIBUTE, Integer.valueOf(request.getServerPort()));
}
try {
getNext().invoke(request, response);
} finally {
if (!request.isAsync()) {
request.setRemoteAddr(originalRemoteAddr);
request.setRemoteHost(originalRemoteHost);
request.setSecure(originalSecure);
request.getCoyoteRequest().scheme().setString(originalScheme);
request.getCoyoteRequest().serverName().setString(originalServerName);
if (isChangeLocalName()) {
request.getCoyoteRequest().localName().setString(originalLocalName);
}
request.setServerPort(originalServerPort);
request.setLocalPort(originalLocalPort);
MimeHeaders headers = request.getCoyoteRequest().getMimeHeaders();
if (originalProxiesHeader == null || originalProxiesHeader.length() == 0) {
headers.removeHeader(proxiesHeader);
} else {
headers.setValue(proxiesHeader).setString(originalProxiesHeader);
}
if (originalRemoteIpHeader == null || originalRemoteIpHeader.length() == 0) {
headers.removeHeader(remoteIpHeader);
} else {
headers.setValue(remoteIpHeader).setString(originalRemoteIpHeader);
}
}
}
}
/*
* Considers the value to be secure if it exclusively holds forwards for {@link #protocolHeaderHttpsValue}.
*/
private boolean isForwardedProtoHeaderValueSecure(String protocolHeaderValue) {
if (!protocolHeaderValue.contains(",")) {
return protocolHeaderHttpsValue.equalsIgnoreCase(protocolHeaderValue);
}
String[] forwardedProtocols = StringUtils.splitCommaSeparated(protocolHeaderValue);
if (forwardedProtocols.length == 0) {
return false;
}
for (String forwardedProtocol : forwardedProtocols) {
if (!protocolHeaderHttpsValue.equalsIgnoreCase(forwardedProtocol)) {
return false;
}
}
return true;
}
private void setPorts(Request request, int defaultPort) {
int port = defaultPort;
if (portHeader != null) {
String portHeaderValue = request.getHeader(portHeader);
if (portHeaderValue != null) {
try {
port = Integer.parseInt(portHeaderValue);
} catch (NumberFormatException nfe) {
if (log.isDebugEnabled()) {
log.debug(sm.getString("remoteIpValve.invalidPortHeader", portHeaderValue, portHeader), nfe);
}
}
}
}
request.setServerPort(port);
if (changeLocalPort) {
request.setLocalPort(port);
}
}
/**
*
* Server Port value if the {@link #protocolHeader} is not null and does not indicate HTTP
*
*
* Default value : 80
*
*
* @param httpServerPort The server port
*/
public void setHttpServerPort(int httpServerPort) {
this.httpServerPort = httpServerPort;
}
/**
*
* Server Port value if the {@link #protocolHeader} indicates HTTPS
*
*
* Default value : 443
*
*
* @param httpsServerPort The server port
*/
public void setHttpsServerPort(int httpsServerPort) {
this.httpsServerPort = httpsServerPort;
}
/**
*
* Regular expression that defines the internal proxies.
*
*
* Default value :
* 10\.\d{1,3}\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3}|169\.254.\d{1,3}.\d{1,3}|127\.\d{1,3}\.\d{1,3}\.\d{1,3}|0:0:0:0:0:0:0:1
*
*
* @param internalProxies The proxy regular expression
*/
public void setInternalProxies(String internalProxies) {
if (internalProxies == null || internalProxies.length() == 0) {
this.internalProxies = null;
} else {
this.internalProxies = Pattern.compile(internalProxies);
}
}
/**
*
* Header that holds the incoming protocol, usually named X-Forwarded-Proto. If null,
* request.scheme and request.secure will not be modified.
*
*
* Default value : X-Forwarded-Proto
*
*
* @param protocolHeader The header name
*/
public void setProtocolHeader(String protocolHeader) {
this.protocolHeader = protocolHeader;
}
/**
*
* Case insensitive value of the protocol header to indicate that the incoming http request uses SSL.
*
*
* Default value : https
*
*
* @param protocolHeaderHttpsValue The header name
*/
public void setProtocolHeaderHttpsValue(String protocolHeaderHttpsValue) {
this.protocolHeaderHttpsValue = protocolHeaderHttpsValue;
}
/**
*
* The proxiesHeader directive specifies a header into which mod_remoteip will collect a list of all of the
* intermediate client IP addresses trusted to resolve the actual remote IP. Note that intermediate
* RemoteIPTrustedProxy addresses are recorded in this header, while any intermediate RemoteIPInternalProxy
* addresses are discarded.
*
*
* Name of the http header that holds the list of trusted proxies that has been traversed by the http request.
*
*
* The value of this header can be comma delimited.
*
*
* Default value : X-Forwarded-By
*
*
* @param proxiesHeader The header name
*/
public void setProxiesHeader(String proxiesHeader) {
this.proxiesHeader = proxiesHeader;
}
/**
*
* Name of the http header from which the remote ip is extracted.
*
*
* The value of this header can be comma delimited.
*
*
* Default value : X-Forwarded-For
*
*
* @param remoteIpHeader The header name
*/
public void setRemoteIpHeader(String remoteIpHeader) {
this.remoteIpHeader = remoteIpHeader;
}
/**
* Should this valve set request attributes for IP address, Hostname, protocol and port used for the request? This
* are typically used in conjunction with the {@link AccessLog} which will otherwise log the original values.
* Default is true. The attributes set are:
*
* - org.apache.catalina.AccessLog.RemoteAddr
* - org.apache.catalina.AccessLog.RemoteHost
* - org.apache.catalina.AccessLog.Protocol
* - org.apache.catalina.AccessLog.ServerPort
* - org.apache.tomcat.remoteAddr
*
*
* @param requestAttributesEnabled true causes the attributes to be set, false disables
* the setting of the attributes.
*/
public void setRequestAttributesEnabled(boolean requestAttributesEnabled) {
this.requestAttributesEnabled = requestAttributesEnabled;
}
/**
*
* Regular expression defining proxies that are trusted when they appear in the {@link #remoteIpHeader} header.
*
*
* Default value : empty list, no external proxy is trusted.
*
*
* @param trustedProxies The regular expression
*/
public void setTrustedProxies(String trustedProxies) {
if (trustedProxies == null || trustedProxies.length() == 0) {
this.trustedProxies = null;
} else {
this.trustedProxies = Pattern.compile(trustedProxies);
}
}
}
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