org.apache.hadoop.http.HttpServer2 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.hadoop.http;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.PrintStream;
import java.net.BindException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.ConfServlet;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configuration.IntegerRanges;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.jmx.JMXJsonServlet;
import org.apache.hadoop.log.LogLevel;
import org.apache.hadoop.security.AuthenticationFilterInitializer;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authentication.server.AuthenticationFilter;
import org.apache.hadoop.security.authentication.util.SignerSecretProvider;
import org.apache.hadoop.security.authorize.AccessControlList;
import org.apache.hadoop.security.ssl.SSLFactory;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.Shell;
import org.apache.hadoop.util.StringUtils;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.server.ConnectionFactory;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.server.HttpConnectionFactory;
import org.eclipse.jetty.server.RequestLog;
import org.eclipse.jetty.server.SecureRequestCustomizer;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.SessionManager;
import org.eclipse.jetty.server.SslConnectionFactory;
import org.eclipse.jetty.server.handler.ContextHandlerCollection;
import org.eclipse.jetty.server.handler.HandlerCollection;
import org.eclipse.jetty.server.handler.RequestLogHandler;
import org.eclipse.jetty.server.session.AbstractSessionManager;
import org.eclipse.jetty.server.session.SessionHandler;
import org.eclipse.jetty.servlet.DefaultServlet;
import org.eclipse.jetty.servlet.FilterHolder;
import org.eclipse.jetty.servlet.FilterMapping;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.servlet.ServletMapping;
import org.eclipse.jetty.util.ArrayUtil;
import org.eclipse.jetty.util.MultiException;
import org.eclipse.jetty.util.ssl.SslContextFactory;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.eclipse.jetty.webapp.WebAppContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Create a Jetty embedded server to answer http requests. The primary goal is
* to serve up status information for the server. There are three contexts:
* "/logs/" -> points to the log directory "/static/" -> points to common static
* files (src/webapps/static) "/" -> the jsp server code from
* (src/webapps/)
*
* This class is a fork of the old HttpServer. HttpServer exists for
* compatibility reasons. See HBASE-10336 for more details.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public final class HttpServer2 implements FilterContainer {
public static final Logger LOG = LoggerFactory.getLogger(HttpServer2.class);
public static final String HTTP_SCHEME = "http";
public static final String HTTPS_SCHEME = "https";
public static final String HTTP_MAX_REQUEST_HEADER_SIZE_KEY =
"hadoop.http.max.request.header.size";
public static final int HTTP_MAX_REQUEST_HEADER_SIZE_DEFAULT = 65536;
public static final String HTTP_MAX_RESPONSE_HEADER_SIZE_KEY =
"hadoop.http.max.response.header.size";
public static final int HTTP_MAX_RESPONSE_HEADER_SIZE_DEFAULT = 65536;
public static final String HTTP_SOCKET_BACKLOG_SIZE_KEY =
"hadoop.http.socket.backlog.size";
public static final int HTTP_SOCKET_BACKLOG_SIZE_DEFAULT = 128;
public static final String HTTP_MAX_THREADS_KEY = "hadoop.http.max.threads";
public static final String HTTP_ACCEPTOR_COUNT_KEY =
"hadoop.http.acceptor.count";
// -1 to use default behavior of setting count based on CPU core count
public static final int HTTP_ACCEPTOR_COUNT_DEFAULT = -1;
public static final String HTTP_SELECTOR_COUNT_KEY =
"hadoop.http.selector.count";
// -1 to use default behavior of setting count based on CPU core count
public static final int HTTP_SELECTOR_COUNT_DEFAULT = -1;
public static final String HTTP_TEMP_DIR_KEY = "hadoop.http.temp.dir";
static final String FILTER_INITIALIZER_PROPERTY
= "hadoop.http.filter.initializers";
// The ServletContext attribute where the daemon Configuration
// gets stored.
public static final String CONF_CONTEXT_ATTRIBUTE = "hadoop.conf";
public static final String ADMINS_ACL = "admins.acl";
public static final String SPNEGO_FILTER = "SpnegoFilter";
public static final String NO_CACHE_FILTER = "NoCacheFilter";
public static final String BIND_ADDRESS = "bind.address";
private final AccessControlList adminsAcl;
protected final Server webServer;
private final HandlerCollection handlers;
private final List listeners = Lists.newArrayList();
protected final WebAppContext webAppContext;
protected final boolean findPort;
protected final IntegerRanges portRanges;
private final Map defaultContexts =
new HashMap<>();
protected final List filterNames = new ArrayList<>();
static final String STATE_DESCRIPTION_ALIVE = " - alive";
static final String STATE_DESCRIPTION_NOT_LIVE = " - not live";
private final SignerSecretProvider secretProvider;
private XFrameOption xFrameOption;
private boolean xFrameOptionIsEnabled;
private static final String X_FRAME_VALUE = "xFrameOption";
private static final String X_FRAME_ENABLED = "X_FRAME_ENABLED";
/**
* Class to construct instances of HTTP server with specific options.
*/
public static class Builder {
private ArrayList endpoints = Lists.newArrayList();
private String name;
private Configuration conf;
private Configuration sslConf;
private String[] pathSpecs;
private AccessControlList adminsAcl;
private boolean securityEnabled = false;
private String usernameConfKey;
private String keytabConfKey;
private boolean needsClientAuth;
private String trustStore;
private String trustStorePassword;
private String trustStoreType;
private String keyStore;
private String keyStorePassword;
private String keyStoreType;
// The -keypass option in keytool
private String keyPassword;
private boolean findPort;
private IntegerRanges portRanges = null;
private String hostName;
private boolean disallowFallbackToRandomSignerSecretProvider;
private String authFilterConfigurationPrefix = "hadoop.http.authentication.";
private String excludeCiphers;
private boolean xFrameEnabled;
private XFrameOption xFrameOption = XFrameOption.SAMEORIGIN;
public Builder setName(String name){
this.name = name;
return this;
}
/**
* Add an endpoint that the HTTP server should listen to.
*
* @param endpoint
* the endpoint of that the HTTP server should listen to. The
* scheme specifies the protocol (i.e. HTTP / HTTPS), the host
* specifies the binding address, and the port specifies the
* listening port. Unspecified or zero port means that the server
* can listen to any port.
*/
public Builder addEndpoint(URI endpoint) {
endpoints.add(endpoint);
return this;
}
/**
* Set the hostname of the http server. The host name is used to resolve the
* _HOST field in Kerberos principals. The hostname of the first listener
* will be used if the name is unspecified.
*/
public Builder hostName(String hostName) {
this.hostName = hostName;
return this;
}
public Builder trustStore(String location, String password, String type) {
this.trustStore = location;
this.trustStorePassword = password;
this.trustStoreType = type;
return this;
}
public Builder keyStore(String location, String password, String type) {
this.keyStore = location;
this.keyStorePassword = password;
this.keyStoreType = type;
return this;
}
public Builder keyPassword(String password) {
this.keyPassword = password;
return this;
}
/**
* Specify whether the server should authorize the client in SSL
* connections.
*/
public Builder needsClientAuth(boolean value) {
this.needsClientAuth = value;
return this;
}
public Builder setFindPort(boolean findPort) {
this.findPort = findPort;
return this;
}
public Builder setPortRanges(IntegerRanges ranges) {
this.portRanges = ranges;
return this;
}
public Builder setConf(Configuration conf) {
this.conf = conf;
return this;
}
/**
* Specify the SSL configuration to load. This API provides an alternative
* to keyStore/keyPassword/trustStore.
*/
public Builder setSSLConf(Configuration sslCnf) {
this.sslConf = sslCnf;
return this;
}
public Builder setPathSpec(String[] pathSpec) {
this.pathSpecs = pathSpec;
return this;
}
public Builder setACL(AccessControlList acl) {
this.adminsAcl = acl;
return this;
}
public Builder setSecurityEnabled(boolean securityEnabled) {
this.securityEnabled = securityEnabled;
return this;
}
public Builder setUsernameConfKey(String usernameConfKey) {
this.usernameConfKey = usernameConfKey;
return this;
}
public Builder setKeytabConfKey(String keytabConfKey) {
this.keytabConfKey = keytabConfKey;
return this;
}
public Builder disallowFallbackToRandomSingerSecretProvider(boolean value) {
this.disallowFallbackToRandomSignerSecretProvider = value;
return this;
}
public Builder authFilterConfigurationPrefix(String value) {
this.authFilterConfigurationPrefix = value;
return this;
}
public Builder excludeCiphers(String pExcludeCiphers) {
this.excludeCiphers = pExcludeCiphers;
return this;
}
/**
* Adds the ability to control X_FRAME_OPTIONS on HttpServer2.
* @param xFrameEnabled - True enables X_FRAME_OPTIONS false disables it.
* @return Builder.
*/
public Builder configureXFrame(boolean xFrameEnabled) {
this.xFrameEnabled = xFrameEnabled;
return this;
}
/**
* Sets a valid X-Frame-option that can be used by HttpServer2.
* @param option - String DENY, SAMEORIGIN or ALLOW-FROM are the only valid
* options. Any other value will throw IllegalArgument
* Exception.
* @return Builder.
*/
public Builder setXFrameOption(String option) {
this.xFrameOption = XFrameOption.getEnum(option);
return this;
}
/**
* A wrapper of {@link Configuration#getPassword(String)}. It returns
* String instead of char[].
*
* @param conf the configuration
* @param name the property name
* @return the password string or null
*/
private static String getPasswordString(Configuration conf, String name)
throws IOException {
char[] passchars = conf.getPassword(name);
if (passchars == null) {
return null;
}
return new String(passchars);
}
/**
* Load SSL properties from the SSL configuration.
*/
private void loadSSLConfiguration() throws IOException {
if (sslConf == null) {
return;
}
needsClientAuth = sslConf.getBoolean(
SSLFactory.SSL_SERVER_NEED_CLIENT_AUTH,
SSLFactory.SSL_SERVER_NEED_CLIENT_AUTH_DEFAULT);
keyStore = sslConf.getTrimmed(SSLFactory.SSL_SERVER_KEYSTORE_LOCATION);
if (keyStore == null || keyStore.isEmpty()) {
throw new IOException(String.format("Property %s not specified",
SSLFactory.SSL_SERVER_KEYSTORE_LOCATION));
}
keyStorePassword = getPasswordString(sslConf,
SSLFactory.SSL_SERVER_KEYSTORE_PASSWORD);
if (keyStorePassword == null) {
throw new IOException(String.format("Property %s not specified",
SSLFactory.SSL_SERVER_KEYSTORE_PASSWORD));
}
keyStoreType = sslConf.get(SSLFactory.SSL_SERVER_KEYSTORE_TYPE,
SSLFactory.SSL_SERVER_KEYSTORE_TYPE_DEFAULT);
keyPassword = getPasswordString(sslConf,
SSLFactory.SSL_SERVER_KEYSTORE_KEYPASSWORD);
trustStore = sslConf.get(SSLFactory.SSL_SERVER_TRUSTSTORE_LOCATION);
trustStorePassword = getPasswordString(sslConf,
SSLFactory.SSL_SERVER_TRUSTSTORE_PASSWORD);
trustStoreType = sslConf.get(SSLFactory.SSL_SERVER_TRUSTSTORE_TYPE,
SSLFactory.SSL_SERVER_TRUSTSTORE_TYPE_DEFAULT);
excludeCiphers = sslConf.get(SSLFactory.SSL_SERVER_EXCLUDE_CIPHER_LIST);
}
public HttpServer2 build() throws IOException {
Preconditions.checkNotNull(name, "name is not set");
Preconditions.checkState(!endpoints.isEmpty(), "No endpoints specified");
if (hostName == null) {
hostName = endpoints.get(0).getHost();
}
if (this.conf == null) {
conf = new Configuration();
}
HttpServer2 server = new HttpServer2(this);
if (this.securityEnabled) {
server.initSpnego(conf, hostName, usernameConfKey, keytabConfKey);
}
for (URI ep : endpoints) {
if (HTTPS_SCHEME.equals(ep.getScheme())) {
loadSSLConfiguration();
break;
}
}
int requestHeaderSize = conf.getInt(
HTTP_MAX_REQUEST_HEADER_SIZE_KEY,
HTTP_MAX_REQUEST_HEADER_SIZE_DEFAULT);
int responseHeaderSize = conf.getInt(
HTTP_MAX_RESPONSE_HEADER_SIZE_KEY,
HTTP_MAX_RESPONSE_HEADER_SIZE_DEFAULT);
HttpConfiguration httpConfig = new HttpConfiguration();
httpConfig.setRequestHeaderSize(requestHeaderSize);
httpConfig.setResponseHeaderSize(responseHeaderSize);
httpConfig.setSendServerVersion(false);
int backlogSize = conf.getInt(HTTP_SOCKET_BACKLOG_SIZE_KEY,
HTTP_SOCKET_BACKLOG_SIZE_DEFAULT);
for (URI ep : endpoints) {
final ServerConnector connector;
String scheme = ep.getScheme();
if (HTTP_SCHEME.equals(scheme)) {
connector = createHttpChannelConnector(server.webServer,
httpConfig);
} else if (HTTPS_SCHEME.equals(scheme)) {
connector = createHttpsChannelConnector(server.webServer,
httpConfig);
} else {
throw new HadoopIllegalArgumentException(
"unknown scheme for endpoint:" + ep);
}
connector.setHost(ep.getHost());
connector.setPort(ep.getPort() == -1 ? 0 : ep.getPort());
connector.setAcceptQueueSize(backlogSize);
server.addListener(connector);
}
server.loadListeners();
return server;
}
private ServerConnector createHttpChannelConnector(
Server server, HttpConfiguration httpConfig) {
ServerConnector conn = new ServerConnector(server,
conf.getInt(HTTP_ACCEPTOR_COUNT_KEY, HTTP_ACCEPTOR_COUNT_DEFAULT),
conf.getInt(HTTP_SELECTOR_COUNT_KEY, HTTP_SELECTOR_COUNT_DEFAULT));
ConnectionFactory connFactory = new HttpConnectionFactory(httpConfig);
conn.addConnectionFactory(connFactory);
configureChannelConnector(conn);
return conn;
}
private ServerConnector createHttpsChannelConnector(
Server server, HttpConfiguration httpConfig) {
httpConfig.setSecureScheme(HTTPS_SCHEME);
httpConfig.addCustomizer(new SecureRequestCustomizer());
ServerConnector conn = createHttpChannelConnector(server, httpConfig);
SslContextFactory sslContextFactory = new SslContextFactory();
sslContextFactory.setNeedClientAuth(needsClientAuth);
sslContextFactory.setKeyManagerPassword(keyPassword);
if (keyStore != null) {
sslContextFactory.setKeyStorePath(keyStore);
sslContextFactory.setKeyStoreType(keyStoreType);
sslContextFactory.setKeyStorePassword(keyStorePassword);
}
if (trustStore != null) {
sslContextFactory.setTrustStorePath(trustStore);
sslContextFactory.setTrustStoreType(trustStoreType);
sslContextFactory.setTrustStorePassword(trustStorePassword);
}
if(null != excludeCiphers && !excludeCiphers.isEmpty()) {
sslContextFactory.setExcludeCipherSuites(
StringUtils.getTrimmedStrings(excludeCiphers));
LOG.info("Excluded Cipher List:" + excludeCiphers);
}
conn.addFirstConnectionFactory(new SslConnectionFactory(sslContextFactory,
HttpVersion.HTTP_1_1.asString()));
return conn;
}
}
private HttpServer2(final Builder b) throws IOException {
final String appDir = getWebAppsPath(b.name);
this.webServer = new Server();
this.adminsAcl = b.adminsAcl;
this.handlers = new HandlerCollection();
this.webAppContext = createWebAppContext(b, adminsAcl, appDir);
this.xFrameOptionIsEnabled = b.xFrameEnabled;
this.xFrameOption = b.xFrameOption;
try {
this.secretProvider =
constructSecretProvider(b, webAppContext.getServletContext());
this.webAppContext.getServletContext().setAttribute
(AuthenticationFilter.SIGNER_SECRET_PROVIDER_ATTRIBUTE,
secretProvider);
} catch(IOException e) {
throw e;
} catch (Exception e) {
throw new IOException(e);
}
this.findPort = b.findPort;
this.portRanges = b.portRanges;
initializeWebServer(b.name, b.hostName, b.conf, b.pathSpecs);
}
private void initializeWebServer(String name, String hostName,
Configuration conf, String[] pathSpecs)
throws IOException {
Preconditions.checkNotNull(webAppContext);
int maxThreads = conf.getInt(HTTP_MAX_THREADS_KEY, -1);
// If HTTP_MAX_THREADS is not configured, QueueThreadPool() will use the
// default value (currently 250).
QueuedThreadPool threadPool = (QueuedThreadPool) webServer.getThreadPool();
threadPool.setDaemon(true);
if (maxThreads != -1) {
threadPool.setMaxThreads(maxThreads);
}
SessionManager sm = webAppContext.getSessionHandler().getSessionManager();
if (sm instanceof AbstractSessionManager) {
AbstractSessionManager asm = (AbstractSessionManager)sm;
asm.setHttpOnly(true);
asm.getSessionCookieConfig().setSecure(true);
}
ContextHandlerCollection contexts = new ContextHandlerCollection();
RequestLog requestLog = HttpRequestLog.getRequestLog(name);
handlers.addHandler(contexts);
if (requestLog != null) {
RequestLogHandler requestLogHandler = new RequestLogHandler();
requestLogHandler.setRequestLog(requestLog);
handlers.addHandler(requestLogHandler);
}
handlers.addHandler(webAppContext);
final String appDir = getWebAppsPath(name);
addDefaultApps(contexts, appDir, conf);
webServer.setHandler(handlers);
Map xFrameParams = new HashMap<>();
xFrameParams.put(X_FRAME_ENABLED,
String.valueOf(this.xFrameOptionIsEnabled));
xFrameParams.put(X_FRAME_VALUE, this.xFrameOption.toString());
addGlobalFilter("safety", QuotingInputFilter.class.getName(), xFrameParams);
final FilterInitializer[] initializers = getFilterInitializers(conf);
if (initializers != null) {
conf = new Configuration(conf);
conf.set(BIND_ADDRESS, hostName);
for (FilterInitializer c : initializers) {
c.initFilter(this, conf);
}
}
addDefaultServlets();
if (pathSpecs != null) {
for (String path : pathSpecs) {
LOG.info("adding path spec: " + path);
addFilterPathMapping(path, webAppContext);
}
}
}
private void addListener(ServerConnector connector) {
listeners.add(connector);
}
private static WebAppContext createWebAppContext(Builder b,
AccessControlList adminsAcl, final String appDir) {
WebAppContext ctx = new WebAppContext();
ctx.setDefaultsDescriptor(null);
ServletHolder holder = new ServletHolder(new DefaultServlet());
Map params = ImmutableMap. builder()
.put("acceptRanges", "true")
.put("dirAllowed", "false")
.put("gzip", "true")
.put("useFileMappedBuffer", "true")
.build();
holder.setInitParameters(params);
ctx.setWelcomeFiles(new String[] {"index.html"});
ctx.addServlet(holder, "/");
ctx.setDisplayName(b.name);
ctx.setContextPath("/");
ctx.setWar(appDir + "/" + b.name);
String tempDirectory = b.conf.get(HTTP_TEMP_DIR_KEY);
if (tempDirectory != null && !tempDirectory.isEmpty()) {
ctx.setTempDirectory(new File(tempDirectory));
ctx.setAttribute("javax.servlet.context.tempdir", tempDirectory);
}
ctx.getServletContext().setAttribute(CONF_CONTEXT_ATTRIBUTE, b.conf);
ctx.getServletContext().setAttribute(ADMINS_ACL, adminsAcl);
addNoCacheFilter(ctx);
return ctx;
}
private static SignerSecretProvider constructSecretProvider(final Builder b,
ServletContext ctx)
throws Exception {
final Configuration conf = b.conf;
Properties config = getFilterProperties(conf,
b.authFilterConfigurationPrefix);
return AuthenticationFilter.constructSecretProvider(
ctx, config, b.disallowFallbackToRandomSignerSecretProvider);
}
private static Properties getFilterProperties(Configuration conf, String
prefix) {
Properties prop = new Properties();
Map filterConfig = AuthenticationFilterInitializer
.getFilterConfigMap(conf, prefix);
prop.putAll(filterConfig);
return prop;
}
private static void addNoCacheFilter(ServletContextHandler ctxt) {
defineFilter(ctxt, NO_CACHE_FILTER, NoCacheFilter.class.getName(),
Collections. emptyMap(), new String[] { "/*" });
}
private static void configureChannelConnector(ServerConnector c) {
c.setIdleTimeout(10000);
if(Shell.WINDOWS) {
// result of setting the SO_REUSEADDR flag is different on Windows
// http://msdn.microsoft.com/en-us/library/ms740621(v=vs.85).aspx
// without this 2 NN's can start on the same machine and listen on
// the same port with indeterminate routing of incoming requests to them
c.setReuseAddress(false);
}
}
/** Get an array of FilterConfiguration specified in the conf */
private static FilterInitializer[] getFilterInitializers(Configuration conf) {
if (conf == null) {
return null;
}
Class[] classes = conf.getClasses(FILTER_INITIALIZER_PROPERTY);
if (classes == null) {
return null;
}
FilterInitializer[] initializers = new FilterInitializer[classes.length];
for(int i = 0; i < classes.length; i++) {
initializers[i] = (FilterInitializer)ReflectionUtils.newInstance(
classes[i], conf);
}
return initializers;
}
/**
* Add default apps.
* @param appDir The application directory
* @throws IOException
*/
protected void addDefaultApps(ContextHandlerCollection parent,
final String appDir, Configuration conf) throws IOException {
// set up the context for "/logs/" if "hadoop.log.dir" property is defined
// and it's enabled.
String logDir = System.getProperty("hadoop.log.dir");
boolean logsEnabled = conf.getBoolean(
CommonConfigurationKeys.HADOOP_HTTP_LOGS_ENABLED,
CommonConfigurationKeys.HADOOP_HTTP_LOGS_ENABLED_DEFAULT);
if (logDir != null && logsEnabled) {
ServletContextHandler logContext =
new ServletContextHandler(parent, "/logs");
logContext.setResourceBase(logDir);
logContext.addServlet(AdminAuthorizedServlet.class, "/*");
if (conf.getBoolean(
CommonConfigurationKeys.HADOOP_JETTY_LOGS_SERVE_ALIASES,
CommonConfigurationKeys.DEFAULT_HADOOP_JETTY_LOGS_SERVE_ALIASES)) {
@SuppressWarnings("unchecked")
Map params = logContext.getInitParams();
params.put("org.eclipse.jetty.servlet.Default.aliases", "true");
}
logContext.setDisplayName("logs");
SessionHandler handler = new SessionHandler();
SessionManager sm = handler.getSessionManager();
if (sm instanceof AbstractSessionManager) {
AbstractSessionManager asm = (AbstractSessionManager) sm;
asm.setHttpOnly(true);
asm.getSessionCookieConfig().setSecure(true);
}
logContext.setSessionHandler(handler);
setContextAttributes(logContext, conf);
addNoCacheFilter(logContext);
defaultContexts.put(logContext, true);
}
// set up the context for "/static/*"
ServletContextHandler staticContext =
new ServletContextHandler(parent, "/static");
staticContext.setResourceBase(appDir + "/static");
staticContext.addServlet(DefaultServlet.class, "/*");
staticContext.setDisplayName("static");
@SuppressWarnings("unchecked")
Map params = staticContext.getInitParams();
params.put("org.eclipse.jetty.servlet.Default.dirAllowed", "false");
params.put("org.eclipse.jetty.servlet.Default.gzip", "true");
SessionHandler handler = new SessionHandler();
SessionManager sm = handler.getSessionManager();
if (sm instanceof AbstractSessionManager) {
AbstractSessionManager asm = (AbstractSessionManager) sm;
asm.setHttpOnly(true);
asm.getSessionCookieConfig().setSecure(true);
}
staticContext.setSessionHandler(handler);
setContextAttributes(staticContext, conf);
defaultContexts.put(staticContext, true);
}
private void setContextAttributes(ServletContextHandler context,
Configuration conf) {
context.getServletContext().setAttribute(CONF_CONTEXT_ATTRIBUTE, conf);
context.getServletContext().setAttribute(ADMINS_ACL, adminsAcl);
}
/**
* Add default servlets.
*/
protected void addDefaultServlets() {
// set up default servlets
addServlet("stacks", "/stacks", StackServlet.class);
addServlet("logLevel", "/logLevel", LogLevel.Servlet.class);
addServlet("jmx", "/jmx", JMXJsonServlet.class);
addServlet("conf", "/conf", ConfServlet.class);
}
public void addContext(ServletContextHandler ctxt, boolean isFiltered) {
handlers.addHandler(ctxt);
addNoCacheFilter(ctxt);
defaultContexts.put(ctxt, isFiltered);
}
/**
* Set a value in the webapp context. These values are available to the jsp
* pages as "application.getAttribute(name)".
* @param name The name of the attribute
* @param value The value of the attribute
*/
public void setAttribute(String name, Object value) {
webAppContext.setAttribute(name, value);
}
/**
* Add a Jersey resource package.
* @param packageName The Java package name containing the Jersey resource.
* @param pathSpec The path spec for the servlet
*/
public void addJerseyResourcePackage(final String packageName,
final String pathSpec) {
LOG.info("addJerseyResourcePackage: packageName=" + packageName
+ ", pathSpec=" + pathSpec);
final ServletHolder sh = new ServletHolder(ServletContainer.class);
sh.setInitParameter("com.sun.jersey.config.property.resourceConfigClass",
"com.sun.jersey.api.core.PackagesResourceConfig");
sh.setInitParameter("com.sun.jersey.config.property.packages", packageName);
webAppContext.addServlet(sh, pathSpec);
}
/**
* Add a servlet in the server.
* @param name The name of the servlet (can be passed as null)
* @param pathSpec The path spec for the servlet
* @param clazz The servlet class
*/
public void addServlet(String name, String pathSpec,
Class clazz) {
addInternalServlet(name, pathSpec, clazz, false);
addFilterPathMapping(pathSpec, webAppContext);
}
/**
* Add an internal servlet in the server.
* Note: This method is to be used for adding servlets that facilitate
* internal communication and not for user facing functionality. For
* servlets added using this method, filters are not enabled.
*
* @param name The name of the servlet (can be passed as null)
* @param pathSpec The path spec for the servlet
* @param clazz The servlet class
*/
public void addInternalServlet(String name, String pathSpec,
Class clazz) {
addInternalServlet(name, pathSpec, clazz, false);
}
/**
* Add an internal servlet in the server, specifying whether or not to
* protect with Kerberos authentication.
* Note: This method is to be used for adding servlets that facilitate
* internal communication and not for user facing functionality. For
* servlets added using this method, filters (except internal Kerberos
* filters) are not enabled.
*
* @param name The name of the servlet (can be passed as null)
* @param pathSpec The path spec for the servlet
* @param clazz The servlet class
* @param requireAuth Require Kerberos authenticate to access servlet
*/
public void addInternalServlet(String name, String pathSpec,
Class clazz, boolean requireAuth) {
ServletHolder holder = new ServletHolder(clazz);
if (name != null) {
holder.setName(name);
}
// Jetty doesn't like the same path spec mapping to different servlets, so
// if there's already a mapping for this pathSpec, remove it and assume that
// the newest one is the one we want
final ServletMapping[] servletMappings =
webAppContext.getServletHandler().getServletMappings();
for (int i = 0; i < servletMappings.length; i++) {
if (servletMappings[i].containsPathSpec(pathSpec)) {
if (LOG.isDebugEnabled()) {
LOG.debug("Found existing " + servletMappings[i].getServletName() +
" servlet at path " + pathSpec + "; will replace mapping" +
" with " + holder.getName() + " servlet");
}
ServletMapping[] newServletMappings =
ArrayUtil.removeFromArray(servletMappings, servletMappings[i]);
webAppContext.getServletHandler()
.setServletMappings(newServletMappings);
break;
}
}
webAppContext.addServlet(holder, pathSpec);
if(requireAuth && UserGroupInformation.isSecurityEnabled()) {
LOG.info("Adding Kerberos (SPNEGO) filter to " + name);
ServletHandler handler = webAppContext.getServletHandler();
FilterMapping fmap = new FilterMapping();
fmap.setPathSpec(pathSpec);
fmap.setFilterName(SPNEGO_FILTER);
fmap.setDispatches(FilterMapping.ALL);
handler.addFilterMapping(fmap);
}
}
/**
* Add the given handler to the front of the list of handlers.
*
* @param handler The handler to add
*/
public void addHandlerAtFront(Handler handler) {
Handler[] h = ArrayUtil.prependToArray(
handler, this.handlers.getHandlers(), Handler.class);
handlers.setHandlers(h);
}
/**
* Add the given handler to the end of the list of handlers.
*
* @param handler The handler to add
*/
public void addHandlerAtEnd(Handler handler) {
handlers.addHandler(handler);
}
@Override
public void addFilter(String name, String classname,
Map parameters) {
FilterHolder filterHolder = getFilterHolder(name, classname, parameters);
final String[] USER_FACING_URLS = { "*.html", "*.jsp" };
FilterMapping fmap = getFilterMapping(name, USER_FACING_URLS);
defineFilter(webAppContext, filterHolder, fmap);
LOG.info(
"Added filter " + name + " (class=" + classname + ") to context "
+ webAppContext.getDisplayName());
final String[] ALL_URLS = { "/*" };
fmap = getFilterMapping(name, ALL_URLS);
for (Map.Entry e
: defaultContexts.entrySet()) {
if (e.getValue()) {
ServletContextHandler ctx = e.getKey();
defineFilter(ctx, filterHolder, fmap);
LOG.info("Added filter " + name + " (class=" + classname
+ ") to context " + ctx.getDisplayName());
}
}
filterNames.add(name);
}
@Override
public void addGlobalFilter(String name, String classname,
Map parameters) {
final String[] ALL_URLS = { "/*" };
FilterHolder filterHolder = getFilterHolder(name, classname, parameters);
FilterMapping fmap = getFilterMapping(name, ALL_URLS);
defineFilter(webAppContext, filterHolder, fmap);
for (ServletContextHandler ctx : defaultContexts.keySet()) {
defineFilter(ctx, filterHolder, fmap);
}
LOG.info("Added global filter '" + name + "' (class=" + classname + ")");
}
/**
* Define a filter for a context and set up default url mappings.
*/
public static void defineFilter(ServletContextHandler ctx, String name,
String classname, Map parameters, String[] urls) {
FilterHolder filterHolder = getFilterHolder(name, classname, parameters);
FilterMapping fmap = getFilterMapping(name, urls);
defineFilter(ctx, filterHolder, fmap);
}
/**
* Define a filter for a context and set up default url mappings.
*/
private static void defineFilter(ServletContextHandler ctx,
FilterHolder holder, FilterMapping fmap) {
ServletHandler handler = ctx.getServletHandler();
handler.addFilter(holder, fmap);
}
private static FilterMapping getFilterMapping(String name, String[] urls) {
FilterMapping fmap = new FilterMapping();
fmap.setPathSpecs(urls);
fmap.setDispatches(FilterMapping.ALL);
fmap.setFilterName(name);
return fmap;
}
private static FilterHolder getFilterHolder(String name, String classname,
Map parameters) {
FilterHolder holder = new FilterHolder();
holder.setName(name);
holder.setClassName(classname);
if (parameters != null) {
holder.setInitParameters(parameters);
}
return holder;
}
/**
* Add the path spec to the filter path mapping.
* @param pathSpec The path spec
* @param webAppCtx The WebApplicationContext to add to
*/
protected void addFilterPathMapping(String pathSpec,
ServletContextHandler webAppCtx) {
ServletHandler handler = webAppCtx.getServletHandler();
for(String name : filterNames) {
FilterMapping fmap = new FilterMapping();
fmap.setPathSpec(pathSpec);
fmap.setFilterName(name);
fmap.setDispatches(FilterMapping.ALL);
handler.addFilterMapping(fmap);
}
}
/**
* Get the value in the webapp context.
* @param name The name of the attribute
* @return The value of the attribute
*/
public Object getAttribute(String name) {
return webAppContext.getAttribute(name);
}
public WebAppContext getWebAppContext(){
return this.webAppContext;
}
/**
* Get the pathname to the webapps files.
* @param appName eg "secondary" or "datanode"
* @return the pathname as a URL
* @throws FileNotFoundException if 'webapps' directory cannot be found on CLASSPATH.
*/
protected String getWebAppsPath(String appName) throws FileNotFoundException {
URL url = getClass().getClassLoader().getResource("webapps/" + appName);
if (url == null)
throw new FileNotFoundException("webapps/" + appName
+ " not found in CLASSPATH");
String urlString = url.toString();
return urlString.substring(0, urlString.lastIndexOf('/'));
}
/**
* Get the port that the server is on
* @return the port
*/
@Deprecated
public int getPort() {
return ((ServerConnector)webServer.getConnectors()[0]).getLocalPort();
}
/**
* Get the address that corresponds to a particular connector.
*
* @return the corresponding address for the connector, or null if there's no
* such connector or the connector is not bounded or was closed.
*/
public InetSocketAddress getConnectorAddress(int index) {
Preconditions.checkArgument(index >= 0);
if (index > webServer.getConnectors().length)
return null;
ServerConnector c = (ServerConnector)webServer.getConnectors()[index];
if (c.getLocalPort() == -1 || c.getLocalPort() == -2) {
// The connector is not bounded or was closed
return null;
}
return new InetSocketAddress(c.getHost(), c.getLocalPort());
}
/**
* Set the min, max number of worker threads (simultaneous connections).
*/
public void setThreads(int min, int max) {
QueuedThreadPool pool = (QueuedThreadPool) webServer.getThreadPool();
pool.setMinThreads(min);
pool.setMaxThreads(max);
}
private void initSpnego(Configuration conf, String hostName,
String usernameConfKey, String keytabConfKey) throws IOException {
Map params = new HashMap<>();
String principalInConf = conf.get(usernameConfKey);
if (principalInConf != null && !principalInConf.isEmpty()) {
params.put("kerberos.principal", SecurityUtil.getServerPrincipal(
principalInConf, hostName));
}
String httpKeytab = conf.get(keytabConfKey);
if (httpKeytab != null && !httpKeytab.isEmpty()) {
params.put("kerberos.keytab", httpKeytab);
}
params.put(AuthenticationFilter.AUTH_TYPE, "kerberos");
defineFilter(webAppContext, SPNEGO_FILTER,
AuthenticationFilter.class.getName(), params, null);
}
/**
* Start the server. Does not wait for the server to start.
*/
public void start() throws IOException {
try {
try {
openListeners();
webServer.start();
} catch (IOException ex) {
LOG.info("HttpServer.start() threw a non Bind IOException", ex);
throw ex;
} catch (MultiException ex) {
LOG.info("HttpServer.start() threw a MultiException", ex);
throw ex;
}
// Make sure there is no handler failures.
Handler[] hs = webServer.getHandlers();
for (Handler handler : hs) {
if (handler.isFailed()) {
throw new IOException(
"Problem in starting http server. Server handlers failed");
}
}
// Make sure there are no errors initializing the context.
Throwable unavailableException = webAppContext.getUnavailableException();
if (unavailableException != null) {
// Have to stop the webserver, or else its non-daemon threads
// will hang forever.
webServer.stop();
throw new IOException("Unable to initialize WebAppContext",
unavailableException);
}
} catch (IOException e) {
throw e;
} catch (InterruptedException e) {
throw (IOException) new InterruptedIOException(
"Interrupted while starting HTTP server").initCause(e);
} catch (Exception e) {
throw new IOException("Problem starting http server", e);
}
}
private void loadListeners() {
for (Connector c : listeners) {
webServer.addConnector(c);
}
}
/**
* Bind listener by closing and opening the listener.
* @param listener
* @throws Exception
*/
private static void bindListener(ServerConnector listener) throws Exception {
// jetty has a bug where you can't reopen a listener that previously
// failed to open w/o issuing a close first, even if the port is changed
listener.close();
listener.open();
LOG.info("Jetty bound to port " + listener.getLocalPort());
}
/**
* Create bind exception by wrapping the bind exception thrown.
* @param listener
* @param ex
* @return
*/
private static BindException constructBindException(ServerConnector listener,
BindException ex) {
BindException be = new BindException("Port in use: "
+ listener.getHost() + ":" + listener.getPort());
if (ex != null) {
be.initCause(ex);
}
return be;
}
/**
* Bind using single configured port. If findPort is true, we will try to bind
* after incrementing port till a free port is found.
* @param listener jetty listener.
* @param port port which is set in the listener.
* @throws Exception
*/
private void bindForSinglePort(ServerConnector listener, int port)
throws Exception {
while (true) {
try {
bindListener(listener);
break;
} catch (BindException ex) {
if (port == 0 || !findPort) {
throw constructBindException(listener, ex);
}
}
// try the next port number
listener.setPort(++port);
Thread.sleep(100);
}
}
/**
* Bind using port ranges. Keep on looking for a free port in the port range
* and throw a bind exception if no port in the configured range binds.
* @param listener jetty listener.
* @param startPort initial port which is set in the listener.
* @throws Exception
*/
private void bindForPortRange(ServerConnector listener, int startPort)
throws Exception {
BindException bindException = null;
try {
bindListener(listener);
return;
} catch (BindException ex) {
// Ignore exception.
bindException = ex;
}
for(Integer port : portRanges) {
if (port == startPort) {
continue;
}
Thread.sleep(100);
listener.setPort(port);
try {
bindListener(listener);
return;
} catch (BindException ex) {
// Ignore exception. Move to next port.
bindException = ex;
}
}
throw constructBindException(listener, bindException);
}
/**
* Open the main listener for the server
* @throws Exception
*/
void openListeners() throws Exception {
LOG.debug("opening listeners: {}", listeners);
for (ServerConnector listener : listeners) {
if (listener.getLocalPort() != -1 && listener.getLocalPort() != -2) {
// This listener is either started externally or has been bound or was
// closed
continue;
}
int port = listener.getPort();
if (portRanges != null && port != 0) {
bindForPortRange(listener, port);
} else {
bindForSinglePort(listener, port);
}
}
}
/**
* stop the server
*/
public void stop() throws Exception {
MultiException exception = null;
for (ServerConnector c : listeners) {
try {
c.close();
} catch (Exception e) {
LOG.error(
"Error while stopping listener for webapp"
+ webAppContext.getDisplayName(), e);
exception = addMultiException(exception, e);
}
}
try {
// explicitly destroy the secret provider
secretProvider.destroy();
// clear & stop webAppContext attributes to avoid memory leaks.
webAppContext.clearAttributes();
webAppContext.stop();
} catch (Exception e) {
LOG.error("Error while stopping web app context for webapp "
+ webAppContext.getDisplayName(), e);
exception = addMultiException(exception, e);
}
try {
webServer.stop();
} catch (Exception e) {
LOG.error("Error while stopping web server for webapp "
+ webAppContext.getDisplayName(), e);
exception = addMultiException(exception, e);
}
if (exception != null) {
exception.ifExceptionThrow();
}
}
private MultiException addMultiException(MultiException exception, Exception e) {
if(exception == null){
exception = new MultiException();
}
exception.add(e);
return exception;
}
public void join() throws InterruptedException {
webServer.join();
}
/**
* Test for the availability of the web server
* @return true if the web server is started, false otherwise
*/
public boolean isAlive() {
return webServer != null && webServer.isStarted();
}
@Override
public String toString() {
Preconditions.checkState(!listeners.isEmpty());
StringBuilder sb = new StringBuilder("HttpServer (")
.append(isAlive() ? STATE_DESCRIPTION_ALIVE
: STATE_DESCRIPTION_NOT_LIVE)
.append("), listening at:");
for (ServerConnector l : listeners) {
sb.append(l.getHost()).append(":").append(l.getPort()).append("/,");
}
return sb.toString();
}
/**
* Checks the user has privileges to access to instrumentation servlets.
*
* If hadoop.security.instrumentation.requires.admin is set to FALSE
* (default value) it always returns TRUE.
*
* If hadoop.security.instrumentation.requires.admin is set to TRUE
* it will check that if the current user is in the admin ACLS. If the user is
* in the admin ACLs it returns TRUE, otherwise it returns FALSE.
*
* @param servletContext the servlet context.
* @param request the servlet request.
* @param response the servlet response.
* @return TRUE/FALSE based on the logic decribed above.
*/
public static boolean isInstrumentationAccessAllowed(
ServletContext servletContext, HttpServletRequest request,
HttpServletResponse response) throws IOException {
Configuration conf =
(Configuration) servletContext.getAttribute(CONF_CONTEXT_ATTRIBUTE);
boolean access = true;
boolean adminAccess = conf.getBoolean(
CommonConfigurationKeys.HADOOP_SECURITY_INSTRUMENTATION_REQUIRES_ADMIN,
false);
if (adminAccess) {
access = hasAdministratorAccess(servletContext, request, response);
}
return access;
}
/**
* Does the user sending the HttpServletRequest has the administrator ACLs? If
* it isn't the case, response will be modified to send an error to the user.
*
* @param response used to send the error response if user does not have admin access.
* @return true if admin-authorized, false otherwise
* @throws IOException
*/
public static boolean hasAdministratorAccess(
ServletContext servletContext, HttpServletRequest request,
HttpServletResponse response) throws IOException {
Configuration conf =
(Configuration) servletContext.getAttribute(CONF_CONTEXT_ATTRIBUTE);
// If there is no authorization, anybody has administrator access.
if (!conf.getBoolean(
CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) {
return true;
}
String remoteUser = request.getRemoteUser();
if (remoteUser == null) {
response.sendError(HttpServletResponse.SC_FORBIDDEN,
"Unauthenticated users are not " +
"authorized to access this page.");
return false;
}
if (servletContext.getAttribute(ADMINS_ACL) != null &&
!userHasAdministratorAccess(servletContext, remoteUser)) {
response.sendError(HttpServletResponse.SC_FORBIDDEN, "User "
+ remoteUser + " is unauthorized to access this page.");
return false;
}
return true;
}
/**
* Get the admin ACLs from the given ServletContext and check if the given
* user is in the ACL.
*
* @param servletContext the context containing the admin ACL.
* @param remoteUser the remote user to check for.
* @return true if the user is present in the ACL, false if no ACL is set or
* the user is not present
*/
public static boolean userHasAdministratorAccess(ServletContext servletContext,
String remoteUser) {
AccessControlList adminsAcl = (AccessControlList) servletContext
.getAttribute(ADMINS_ACL);
UserGroupInformation remoteUserUGI =
UserGroupInformation.createRemoteUser(remoteUser);
return adminsAcl != null && adminsAcl.isUserAllowed(remoteUserUGI);
}
/**
* A very simple servlet to serve up a text representation of the current
* stack traces. It both returns the stacks to the caller and logs them.
* Currently the stack traces are done sequentially rather than exactly the
* same data.
*/
public static class StackServlet extends HttpServlet {
private static final long serialVersionUID = -6284183679759467039L;
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
if (!HttpServer2.isInstrumentationAccessAllowed(getServletContext(),
request, response)) {
return;
}
response.setContentType("text/plain; charset=UTF-8");
try (PrintStream out = new PrintStream(
response.getOutputStream(), false, "UTF-8")) {
ReflectionUtils.printThreadInfo(out, "");
}
ReflectionUtils.logThreadInfo(LOG, "jsp requested", 1);
}
}
/**
* A Servlet input filter that quotes all HTML active characters in the
* parameter names and values. The goal is to quote the characters to make
* all of the servlets resistant to cross-site scripting attacks. It also
* sets X-FRAME-OPTIONS in the header to mitigate clickjacking attacks.
*/
public static class QuotingInputFilter implements Filter {
private FilterConfig config;
public static class RequestQuoter extends HttpServletRequestWrapper {
private final HttpServletRequest rawRequest;
public RequestQuoter(HttpServletRequest rawRequest) {
super(rawRequest);
this.rawRequest = rawRequest;
}
/**
* Return the set of parameter names, quoting each name.
*/
@SuppressWarnings("unchecked")
@Override
public Enumeration getParameterNames() {
return new Enumeration() {
private Enumeration rawIterator =
rawRequest.getParameterNames();
@Override
public boolean hasMoreElements() {
return rawIterator.hasMoreElements();
}
@Override
public String nextElement() {
return HtmlQuoting.quoteHtmlChars(rawIterator.nextElement());
}
};
}
/**
* Unquote the name and quote the value.
*/
@Override
public String getParameter(String name) {
return HtmlQuoting.quoteHtmlChars(rawRequest.getParameter
(HtmlQuoting.unquoteHtmlChars(name)));
}
@Override
public String[] getParameterValues(String name) {
String unquoteName = HtmlQuoting.unquoteHtmlChars(name);
String[] unquoteValue = rawRequest.getParameterValues(unquoteName);
if (unquoteValue == null) {
return null;
}
String[] result = new String[unquoteValue.length];
for(int i=0; i < result.length; ++i) {
result[i] = HtmlQuoting.quoteHtmlChars(unquoteValue[i]);
}
return result;
}
@SuppressWarnings("unchecked")
@Override
public Map getParameterMap() {
Map result = new HashMap<>();
Map raw = rawRequest.getParameterMap();
for (Map.Entry item: raw.entrySet()) {
String[] rawValue = item.getValue();
String[] cookedValue = new String[rawValue.length];
for(int i=0; i< rawValue.length; ++i) {
cookedValue[i] = HtmlQuoting.quoteHtmlChars(rawValue[i]);
}
result.put(HtmlQuoting.quoteHtmlChars(item.getKey()), cookedValue);
}
return result;
}
/**
* Quote the url so that users specifying the HOST HTTP header
* can't inject attacks.
*/
@Override
public StringBuffer getRequestURL(){
String url = rawRequest.getRequestURL().toString();
return new StringBuffer(HtmlQuoting.quoteHtmlChars(url));
}
/**
* Quote the server name so that users specifying the HOST HTTP header
* can't inject attacks.
*/
@Override
public String getServerName() {
return HtmlQuoting.quoteHtmlChars(rawRequest.getServerName());
}
}
@Override
public void init(FilterConfig config) throws ServletException {
this.config = config;
}
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain
) throws IOException, ServletException {
HttpServletRequestWrapper quoted =
new RequestQuoter((HttpServletRequest) request);
HttpServletResponse httpResponse = (HttpServletResponse) response;
String mime = inferMimeType(request);
if (mime == null) {
httpResponse.setContentType("text/plain; charset=utf-8");
} else if (mime.startsWith("text/html")) {
// HTML with unspecified encoding, we want to
// force HTML with utf-8 encoding
// This is to avoid the following security issue:
// http://openmya.hacker.jp/hasegawa/security/utf7cs.html
httpResponse.setContentType("text/html; charset=utf-8");
} else if (mime.startsWith("application/xml")) {
httpResponse.setContentType("text/xml; charset=utf-8");
}
if(Boolean.valueOf(this.config.getInitParameter(X_FRAME_ENABLED))) {
httpResponse.addHeader("X-FRAME-OPTIONS",
this.config.getInitParameter(X_FRAME_VALUE));
}
chain.doFilter(quoted, httpResponse);
}
/**
* Infer the mime type for the response based on the extension of the request
* URI. Returns null if unknown.
*/
private String inferMimeType(ServletRequest request) {
String path = ((HttpServletRequest)request).getRequestURI();
ServletContextHandler.Context sContext =
(ServletContextHandler.Context)config.getServletContext();
String mime = sContext.getMimeType(path);
return (mime == null) ? null : mime;
}
}
/**
* The X-FRAME-OPTIONS header in HTTP response to mitigate clickjacking
* attack.
*/
public enum XFrameOption {
DENY("DENY") , SAMEORIGIN ("SAMEORIGIN"), ALLOWFROM ("ALLOW-FROM");
XFrameOption(String name) {
this.name = name;
}
private final String name;
@Override
public String toString() {
return this.name;
}
/**
* We cannot use valueOf since the AllowFrom enum differs from its value
* Allow-From. This is a helper method that does exactly what valueof does,
* but allows us to handle the AllowFrom issue gracefully.
*
* @param value - String must be DENY, SAMEORIGIN or ALLOW-FROM.
* @return XFrameOption or throws IllegalException.
*/
private static XFrameOption getEnum(String value) {
Preconditions.checkState(value != null && !value.isEmpty());
for (XFrameOption xoption : values()) {
if (value.equals(xoption.toString())) {
return xoption;
}
}
throw new IllegalArgumentException("Unexpected value in xFrameOption.");
}
}
}
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