/*
 * 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.UnsupportedEncodingException;
import java.net.InetAddress;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.HashSet;

import javax.management.ObjectName;

import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.Service;
import org.apache.catalina.core.AprLifecycleListener;
import org.apache.catalina.util.LifecycleMBeanBase;
import org.apache.coyote.AbstractProtocol;
import org.apache.coyote.Adapter;
import org.apache.coyote.ProtocolHandler;
import org.apache.coyote.UpgradeProtocol;
import org.apache.coyote.ajp.AbstractAjpProtocol;
import org.apache.coyote.http11.AbstractHttp11JsseProtocol;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.IntrospectionUtils;
import org.apache.tomcat.util.buf.B2CConverter;
import org.apache.tomcat.util.net.SSLHostConfig;
import org.apache.tomcat.util.net.openssl.OpenSSLImplementation;
import org.apache.tomcat.util.res.StringManager;


/**
 * Implementation of a Coyote connector.
 *
 * @author Craig R. McClanahan
 * @author Remy Maucherat
 */
public class Connector extends LifecycleMBeanBase  {

    private static final Log log = LogFactory.getLog(Connector.class);


    /**
     * Alternate flag to enable recycling of facades.
     */
    public static final boolean RECYCLE_FACADES =
        Boolean.parseBoolean(System.getProperty("org.apache.catalina.connector.RECYCLE_FACADES", "false"));


    public static final String INTERNAL_EXECUTOR_NAME = "Internal";


    // ------------------------------------------------------------ Constructor

    /**
     * Defaults to using HTTP/1.1 NIO implementation.
     */
    public Connector() {
        this("org.apache.coyote.http11.Http11NioProtocol");
    }


    public Connector(String protocol) {
        boolean aprConnector = AprLifecycleListener.isAprAvailable() &&
                AprLifecycleListener.getUseAprConnector();

        if ("HTTP/1.1".equals(protocol) || protocol == null) {
            if (aprConnector) {
                protocolHandlerClassName = "org.apache.coyote.http11.Http11AprProtocol";
            } else {
                protocolHandlerClassName = "org.apache.coyote.http11.Http11NioProtocol";
            }
        } else if ("AJP/1.3".equals(protocol)) {
            if (aprConnector) {
                protocolHandlerClassName = "org.apache.coyote.ajp.AjpAprProtocol";
            } else {
                protocolHandlerClassName = "org.apache.coyote.ajp.AjpNioProtocol";
            }
        } else {
            protocolHandlerClassName = protocol;
        }

        // Instantiate protocol handler
        ProtocolHandler p = null;
        try {
            Class<?> clazz = Class.forName(protocolHandlerClassName);
            p = (ProtocolHandler) clazz.getConstructor().newInstance();
        } catch (Exception e) {
            log.error(sm.getString(
                    "coyoteConnector.protocolHandlerInstantiationFailed"), e);
        } finally {
            this.protocolHandler = p;
        }

        // Default for Connector depends on this system property
        setThrowOnFailure(Boolean.getBoolean("org.apache.catalina.startup.EXIT_ON_INIT_FAILURE"));
    }


    // ----------------------------------------------------- Instance Variables


    /**
     * The <code>Service</code> we are associated with (if any).
     */
    protected Service service = null;


    /**
     * Do we allow TRACE ?
     */
    protected boolean allowTrace = false;


    /**
     * Default timeout for asynchronous requests (ms).
     */
    protected long asyncTimeout = 30000;


    /**
     * The "enable DNS lookups" flag for this Connector.
     */
    protected boolean enableLookups = false;


    /*
     * Is generation of X-Powered-By response header enabled/disabled?
     */
    protected boolean xpoweredBy = false;


    /**
     * The server name to which we should pretend requests to this Connector
     * were directed.  This is useful when operating Tomcat behind a proxy
     * server, so that redirects get constructed accurately.  If not specified,
     * the server name included in the <code>Host</code> header is used.
     */
    protected String proxyName = null;


    /**
     * The server port to which we should pretend requests to this Connector
     * were directed.  This is useful when operating Tomcat behind a proxy
     * server, so that redirects get constructed accurately.  If not specified,
     * the port number specified by the <code>port</code> property is used.
     */
    protected int proxyPort = 0;


    /**
     * The redirect port for non-SSL to SSL redirects.
     */
    protected int redirectPort = 443;


    /**
     * The request scheme that will be set on all requests received
     * through this connector.
     */
    protected String scheme = "http";


    /**
     * The secure connection flag that will be set on all requests received
     * through this connector.
     */
    protected boolean secure = false;


    /**
     * The string manager for this package.
     */
    protected static final StringManager sm = StringManager.getManager(Connector.class);


    /**
     * The maximum number of cookies permitted for a request. Use a value less
     * than zero for no limit. Defaults to 200.
     */
    private int maxCookieCount = 200;

    /**
     * The maximum number of parameters (GET plus POST) which will be
     * automatically parsed by the container. 10000 by default. A value of less
     * than 0 means no limit.
     */
    protected int maxParameterCount = 10000;

    /**
     * Maximum size of a POST which will be automatically parsed by the
     * container. 2MB by default.
     */
    protected int maxPostSize = 2 * 1024 * 1024;


    /**
     * Maximum size of a POST which will be saved by the container
     * during authentication. 4kB by default
     */
    protected int maxSavePostSize = 4 * 1024;

    /**
     * Comma-separated list of HTTP methods that will be parsed according
     * to POST-style rules for application/x-www-form-urlencoded request bodies.
     */
    protected String parseBodyMethods = "POST";

    /**
     * A Set of methods determined by {@link #parseBodyMethods}.
     */
    protected HashSet<String> parseBodyMethodsSet;


    /**
     * Flag to use IP-based virtual hosting.
     */
    protected boolean useIPVHosts = false;


    /**
     * Coyote Protocol handler class name.
     * See {@link #Connector()} for current default.
     */
    protected final String protocolHandlerClassName;


    /**
     * Coyote protocol handler.
     */
    protected final ProtocolHandler protocolHandler;


    /**
     * Coyote adapter.
     */
    protected Adapter adapter = null;


    private Charset uriCharset = StandardCharsets.UTF_8;


    /**
     * URI encoding as body.
     */
    protected boolean useBodyEncodingForURI = false;


    // ------------------------------------------------------------- Properties

    /**
     * Return a property from the protocol handler.
     *
     * @param name the property name
     * @return the property value
     */
    public Object getProperty(String name) {
        if (protocolHandler == null) {
            return null;
        }
        return IntrospectionUtils.getProperty(protocolHandler, name);
    }


    /**
     * Set a property on the protocol handler.
     *
     * @param name the property name
     * @param value the property value
     * @return <code>true</code> if the property was successfully set
     */
    public boolean setProperty(String name, String value) {
        if (protocolHandler == null) {
            return false;
        }
        return IntrospectionUtils.setProperty(protocolHandler, name, value);
    }


    /**
     * Return a property from the protocol handler.
     *
     * @param name the property name
     * @return the property value
     */
    public Object getAttribute(String name) {
        return getProperty(name);
    }


    /**
     * Set a property on the protocol handler.
     *
     * @param name the property name
     * @param value the property value
     */
    public void setAttribute(String name, Object value) {
        setProperty(name, String.valueOf(value));
    }


    /**
     * @return the <code>Service</code> with which we are associated (if any).
     */
    public Service getService() {
        return this.service;
    }


    /**
     * Set the <code>Service</code> with which we are associated (if any).
     *
     * @param service The service that owns this Engine
     */
    public void setService(Service service) {
        this.service = service;
    }


    /**
     * @return <code>true</code> if the TRACE method is allowed. Default value
     *         is <code>false</code>.
     */
    public boolean getAllowTrace() {
        return this.allowTrace;
    }


    /**
     * Set the allowTrace flag, to disable or enable the TRACE HTTP method.
     *
     * @param allowTrace The new allowTrace flag
     */
    public void setAllowTrace(boolean allowTrace) {
        this.allowTrace = allowTrace;
        setProperty("allowTrace", String.valueOf(allowTrace));
    }


    /**
     * @return the default timeout for async requests in ms.
     */
    public long getAsyncTimeout() {
        return asyncTimeout;
    }


    /**
     * Set the default timeout for async requests.
     *
     * @param asyncTimeout The new timeout in ms.
     */
    public void setAsyncTimeout(long asyncTimeout) {
        this.asyncTimeout= asyncTimeout;
        setProperty("asyncTimeout", String.valueOf(asyncTimeout));
    }


    /**
     * @return the "enable DNS lookups" flag.
     */
    public boolean getEnableLookups() {
        return this.enableLookups;
    }


    /**
     * Set the "enable DNS lookups" flag.
     *
     * @param enableLookups The new "enable DNS lookups" flag value
     */
    public void setEnableLookups(boolean enableLookups) {
        this.enableLookups = enableLookups;
        setProperty("enableLookups", String.valueOf(enableLookups));
    }


    public int getMaxCookieCount() {
        return maxCookieCount;
    }


    public void setMaxCookieCount(int maxCookieCount) {
        this.maxCookieCount = maxCookieCount;
    }


    /**
     * @return the maximum number of parameters (GET plus POST) that will be
     * automatically parsed by the container. A value of less than 0 means no
     * limit.
     */
    public int getMaxParameterCount() {
        return maxParameterCount;
    }


    /**
     * Set the maximum number of parameters (GET plus POST) that will be
     * automatically parsed by the container. A value of less than 0 means no
     * limit.
     *
     * @param maxParameterCount The new setting
     */
    public void setMaxParameterCount(int maxParameterCount) {
        this.maxParameterCount = maxParameterCount;
        setProperty("maxParameterCount", String.valueOf(maxParameterCount));
    }


    /**
     * @return the maximum size of a POST which will be automatically
     * parsed by the container.
     */
    public int getMaxPostSize() {
        return maxPostSize;
    }


    /**
     * Set the maximum size of a POST which will be automatically
     * parsed by the container.
     *
     * @param maxPostSize The new maximum size in bytes of a POST which will
     * be automatically parsed by the container
     */
    public void setMaxPostSize(int maxPostSize) {
        this.maxPostSize = maxPostSize;
        setProperty("maxPostSize", String.valueOf(maxPostSize));
    }


    /**
     * @return the maximum size of a POST which will be saved by the container
     * during authentication.
     */
    public int getMaxSavePostSize() {
        return maxSavePostSize;
    }


    /**
     * Set the maximum size of a POST which will be saved by the container
     * during authentication.
     *
     * @param maxSavePostSize The new maximum size in bytes of a POST which will
     * be saved by the container during authentication.
     */
    public void setMaxSavePostSize(int maxSavePostSize) {
        this.maxSavePostSize = maxSavePostSize;
        setProperty("maxSavePostSize", String.valueOf(maxSavePostSize));
    }


    /**
     * @return the HTTP methods which will support body parameters parsing
     */
    public String getParseBodyMethods() {
        return this.parseBodyMethods;
    }


    /**
     * Set list of HTTP methods which should allow body parameter
     * parsing. This defaults to <code>POST</code>.
     *
     * @param methods Comma separated list of HTTP method names
     */
    public void setParseBodyMethods(String methods) {

        HashSet<String> methodSet = new HashSet<>();

        if (null != methods) {
            methodSet.addAll(Arrays.asList(methods.split("\\s*,\\s*")));
        }

        if (methodSet.contains("TRACE")) {
            throw new IllegalArgumentException(sm.getString("coyoteConnector.parseBodyMethodNoTrace"));
        }

        this.parseBodyMethods = methods;
        this.parseBodyMethodsSet = methodSet;
        setProperty("parseBodyMethods", methods);
    }


    protected boolean isParseBodyMethod(String method) {
        return parseBodyMethodsSet.contains(method);
    }


    /**
     * @return the port number on which this connector is configured to listen
     * for requests. The special value of 0 means select a random free port
     * when the socket is bound.
     */
    public int getPort() {
        // Try shortcut that should work for nearly all uses first as it does
        // not use reflection and is therefore faster.
        if (protocolHandler instanceof AbstractProtocol<?>) {
            return ((AbstractProtocol<?>) protocolHandler).getPort();
        }
        // Fall back for custom protocol handlers not based on AbstractProtocol
        Object port = getProperty("port");
        if (port instanceof Integer) {
            return ((Integer) port).intValue();
        }
        // Usually means an invalid protocol has been configured
        return -1;
    }


    /**
     * Set the port number on which we listen for requests.
     *
     * @param port The new port number
     */
    public void setPort(int port) {
        setProperty("port", String.valueOf(port));
    }


    public int getPortOffset() {
        // Try shortcut that should work for nearly all uses first as it does
        // not use reflection and is therefore faster.
        if (protocolHandler instanceof AbstractProtocol<?>) {
            return ((AbstractProtocol<?>) protocolHandler).getPortOffset();
        }
        // Fall back for custom protocol handlers not based on AbstractProtocol
        Object port = getProperty("portOffset");
        if (port instanceof Integer) {
            return ((Integer) port).intValue();
        }
        // Usually means an invalid protocol has been configured.
        return 0;
    }


    public void setPortOffset(int portOffset) {
        setProperty("portOffset", String.valueOf(portOffset));
    }


    public int getPortWithOffset() {
        int port = getPort();
        // Zero is a special case and negative values are invalid
        if (port > 0) {
            return port + getPortOffset();
        }
        return port;
    }


    /**
     * @return the port number on which this connector is listening to requests.
     * If the special value for {@link #getPort} of zero is used then this method
     * will report the actual port bound.
     */
    public int getLocalPort() {
        return ((Integer) getProperty("localPort")).intValue();
    }


    /**
     * @return the Coyote protocol handler in use.
     */
    public String getProtocol() {
        if (("org.apache.coyote.http11.Http11NioProtocol".equals(getProtocolHandlerClassName()) &&
                    (!AprLifecycleListener.isAprAvailable() || !AprLifecycleListener.getUseAprConnector())) ||
                "org.apache.coyote.http11.Http11AprProtocol".equals(getProtocolHandlerClassName()) &&
                    AprLifecycleListener.getUseAprConnector()) {
            return "HTTP/1.1";
        } else if (("org.apache.coyote.ajp.AjpNioProtocol".equals(getProtocolHandlerClassName()) &&
                    (!AprLifecycleListener.isAprAvailable() || !AprLifecycleListener.getUseAprConnector())) ||
                "org.apache.coyote.ajp.AjpAprProtocol".equals(getProtocolHandlerClassName()) &&
                    AprLifecycleListener.getUseAprConnector()) {
            return "AJP/1.3";
        }
        return getProtocolHandlerClassName();
    }


    /**
     * @return the class name of the Coyote protocol handler in use.
     */
    public String getProtocolHandlerClassName() {
        return this.protocolHandlerClassName;
    }


    /**
     * @return the protocol handler associated with the connector.
     */
    public ProtocolHandler getProtocolHandler() {
        return this.protocolHandler;
    }


    /**
     * @return the proxy server name for this Connector.
     */
    public String getProxyName() {
        return this.proxyName;
    }


    /**
     * Set the proxy server name for this Connector.
     *
     * @param proxyName The new proxy server name
     */
    public void setProxyName(String proxyName) {

        if(proxyName != null && proxyName.length() > 0) {
            this.proxyName = proxyName;
        } else {
            this.proxyName = null;
        }
        setProperty("proxyName", this.proxyName);
    }


    /**
     * @return the proxy server port for this Connector.
     */
    public int getProxyPort() {
        return this.proxyPort;
    }


    /**
     * Set the proxy server port for this Connector.
     *
     * @param proxyPort The new proxy server port
     */
    public void setProxyPort(int proxyPort) {
        this.proxyPort = proxyPort;
        setProperty("proxyPort", String.valueOf(proxyPort));
    }


    /**
     * @return the port number to which a request should be redirected if
     * it comes in on a non-SSL port and is subject to a security constraint
     * with a transport guarantee that requires SSL.
     */
    public int getRedirectPort() {
        return this.redirectPort;
    }


    /**
     * Set the redirect port number.
     *
     * @param redirectPort The redirect port number (non-SSL to SSL)
     */
    public void setRedirectPort(int redirectPort) {
        this.redirectPort = redirectPort;
        setProperty("redirectPort", String.valueOf(redirectPort));
    }


    public int getRedirectPortWithOffset() {
        return getRedirectPort() + getPortOffset();
    }


    /**
     * @return the scheme that will be assigned to requests received
     * through this connector.  Default value is "http".
     */
    public String getScheme() {
        return this.scheme;
    }


    /**
     * Set the scheme that will be assigned to requests received through
     * this connector.
     *
     * @param scheme The new scheme
     */
    public void setScheme(String scheme) {
        this.scheme = scheme;
    }


    /**
     * @return the secure connection flag that will be assigned to requests
     * received through this connector.  Default value is "false".
     */
    public boolean getSecure() {
        return this.secure;
    }


    /**
     * Set the secure connection flag that will be assigned to requests
     * received through this connector.
     *
     * @param secure The new secure connection flag
     */
    public void setSecure(boolean secure) {
        this.secure = secure;
        setProperty("secure", Boolean.toString(secure));
    }


    /**
     * @return the name of character encoding to be used for the URI using the
     * original case.
     */
    public String getURIEncoding() {
        return uriCharset.name();
    }


    /**
     *
     * @return The Charset to use to convert raw URI bytes (after %nn decoding)
     *         to characters. This will never be null
     */
    public Charset getURICharset() {
        return uriCharset;
    }

    /**
     * Set the URI encoding to be used for the URI.
     *
     * @param URIEncoding The new URI character encoding.
     */
    public void setURIEncoding(String URIEncoding) {
        try {
            uriCharset = B2CConverter.getCharset(URIEncoding);
        } catch (UnsupportedEncodingException e) {
            log.warn(sm.getString("coyoteConnector.invalidEncoding",
                    URIEncoding, uriCharset.name()), e);
        }
    }


    /**
     * @return the true if the entity body encoding should be used for the URI.
     */
    public boolean getUseBodyEncodingForURI() {
        return this.useBodyEncodingForURI;
    }


    /**
     * Set if the entity body encoding should be used for the URI.
     *
     * @param useBodyEncodingForURI The new value for the flag.
     */
    public void setUseBodyEncodingForURI(boolean useBodyEncodingForURI) {
        this.useBodyEncodingForURI = useBodyEncodingForURI;
        setProperty("useBodyEncodingForURI", String.valueOf(useBodyEncodingForURI));
    }

    /**
     * Indicates whether the generation of an X-Powered-By response header for
     * Servlet-generated responses is enabled or disabled for this Connector.
     *
     * @return <code>true</code> if generation of X-Powered-By response header is enabled,
     * false otherwise
     */
    public boolean getXpoweredBy() {
        return xpoweredBy;
    }


    /**
     * Enables or disables the generation of an X-Powered-By header (with value
     * Servlet/2.5) for all servlet-generated responses returned by this
     * Connector.
     *
     * @param xpoweredBy true if generation of X-Powered-By response header is
     * to be enabled, false otherwise
     */
    public void setXpoweredBy(boolean xpoweredBy) {
        this.xpoweredBy = xpoweredBy;
        setProperty("xpoweredBy", String.valueOf(xpoweredBy));
    }


    /**
     * Enable the use of IP-based virtual hosting.
     *
     * @param useIPVHosts <code>true</code> if Hosts are identified by IP,
     *                    <code>false</code> if Hosts are identified by name.
     */
    public void setUseIPVHosts(boolean useIPVHosts) {
        this.useIPVHosts = useIPVHosts;
        setProperty("useIPVHosts", String.valueOf(useIPVHosts));
    }


    /**
     * Test if IP-based virtual hosting is enabled.
     *
     * @return <code>true</code> if IP vhosts are enabled
     */
    public boolean getUseIPVHosts() {
        return useIPVHosts;
    }


    public String getExecutorName() {
        Object obj = protocolHandler.getExecutor();
        if (obj instanceof org.apache.catalina.Executor) {
            return ((org.apache.catalina.Executor) obj).getName();
        }
        return INTERNAL_EXECUTOR_NAME;
    }


    public void addSslHostConfig(SSLHostConfig sslHostConfig) {
        protocolHandler.addSslHostConfig(sslHostConfig);
    }


    public SSLHostConfig[] findSslHostConfigs() {
        return protocolHandler.findSslHostConfigs();
    }


    public void addUpgradeProtocol(UpgradeProtocol upgradeProtocol) {
        protocolHandler.addUpgradeProtocol(upgradeProtocol);
    }


    public UpgradeProtocol[] findUpgradeProtocols() {
        return protocolHandler.findUpgradeProtocols();
    }


    // --------------------------------------------------------- Public Methods

    /**
     * Create (or allocate) and return a Request object suitable for
     * specifying the contents of a Request to the responsible Container.
     *
     * @return a new Servlet request object
     */
    public Request createRequest() {
        return new Request(this);
    }


    /**
     * Create (or allocate) and return a Response object suitable for
     * receiving the contents of a Response from the responsible Container.
     *
     * @return a new Servlet response object
     */
    public Response createResponse() {
        if (protocolHandler instanceof AbstractAjpProtocol<?>) {
            int packetSize = ((AbstractAjpProtocol<?>) protocolHandler).getPacketSize();
            return new Response(packetSize - org.apache.coyote.ajp.Constants.SEND_HEAD_LEN);
        } else {
            return new Response();
        }
    }


    protected String createObjectNameKeyProperties(String type) {

        Object addressObj = getProperty("address");

        StringBuilder sb = new StringBuilder("type=");
        sb.append(type);
        sb.append(",port=");
        int port = getPortWithOffset();
        if (port > 0) {
            sb.append(port);
        } else {
            sb.append("auto-");
            sb.append(getProperty("nameIndex"));
        }
        String address = "";
        if (addressObj instanceof InetAddress) {
            address = ((InetAddress) addressObj).getHostAddress();
        } else if (addressObj != null) {
            address = addressObj.toString();
        }
        if (address.length() > 0) {
            sb.append(",address=");
            sb.append(ObjectName.quote(address));
        }
        return sb.toString();
    }


    /**
     * Pause the connector.
     */
    public void pause() {
        try {
            if (protocolHandler != null) {
                protocolHandler.pause();
            }
        } catch (Exception e) {
            log.error(sm.getString("coyoteConnector.protocolHandlerPauseFailed"), e);
        }
    }


    /**
     * Resume the connector.
     */
    public void resume() {
        try {
            if (protocolHandler != null) {
                protocolHandler.resume();
            }
        } catch (Exception e) {
            log.error(sm.getString("coyoteConnector.protocolHandlerResumeFailed"), e);
        }
    }


    @Override
    protected void initInternal() throws LifecycleException {

        super.initInternal();

        if (protocolHandler == null) {
            throw new LifecycleException(
                    sm.getString("coyoteConnector.protocolHandlerInstantiationFailed"));
        }

        // Initialize adapter
        adapter = new CoyoteAdapter(this);
        protocolHandler.setAdapter(adapter);
        if (service != null) {
            protocolHandler.setUtilityExecutor(service.getServer().getUtilityExecutor());
        }

        // Make sure parseBodyMethodsSet has a default
        if (null == parseBodyMethodsSet) {
            setParseBodyMethods(getParseBodyMethods());
        }

        if (protocolHandler.isAprRequired() && !AprLifecycleListener.isAprAvailable()) {
            throw new LifecycleException(sm.getString("coyoteConnector.protocolHandlerNoApr",
                    getProtocolHandlerClassName()));
        }
        if (AprLifecycleListener.isAprAvailable() && AprLifecycleListener.getUseOpenSSL() &&
                protocolHandler instanceof AbstractHttp11JsseProtocol) {
            AbstractHttp11JsseProtocol<?> jsseProtocolHandler =
                    (AbstractHttp11JsseProtocol<?>) protocolHandler;
            if (jsseProtocolHandler.isSSLEnabled() &&
                    jsseProtocolHandler.getSslImplementationName() == null) {
                // OpenSSL is compatible with the JSSE configuration, so use it if APR is available
                jsseProtocolHandler.setSslImplementationName(OpenSSLImplementation.class.getName());
            }
        }

        try {
            protocolHandler.init();
        } catch (Exception e) {
            throw new LifecycleException(
                    sm.getString("coyoteConnector.protocolHandlerInitializationFailed"), e);
        }
    }


    /**
     * Begin processing requests via this Connector.
     *
     * @exception LifecycleException if a fatal startup error occurs
     */
    @Override
    protected void startInternal() throws LifecycleException {

        // Validate settings before starting
        if (getPortWithOffset() < 0) {
            throw new LifecycleException(sm.getString(
                    "coyoteConnector.invalidPort", Integer.valueOf(getPortWithOffset())));
        }

        setState(LifecycleState.STARTING);

        try {
            protocolHandler.start();
        } catch (Exception e) {
            throw new LifecycleException(
                    sm.getString("coyoteConnector.protocolHandlerStartFailed"), e);
        }
    }


    /**
     * Terminate processing requests via this Connector.
     *
     * @exception LifecycleException if a fatal shutdown error occurs
     */
    @Override
    protected void stopInternal() throws LifecycleException {

        setState(LifecycleState.STOPPING);

        try {
            if (protocolHandler != null) {
                protocolHandler.stop();
            }
        } catch (Exception e) {
            throw new LifecycleException(
                    sm.getString("coyoteConnector.protocolHandlerStopFailed"), e);
        }
    }


    @Override
    protected void destroyInternal() throws LifecycleException {
        try {
            if (protocolHandler != null) {
                protocolHandler.destroy();
            }
        } catch (Exception e) {
            throw new LifecycleException(
                    sm.getString("coyoteConnector.protocolHandlerDestroyFailed"), e);
        }

        if (getService() != null) {
            getService().removeConnector(this);
        }

        super.destroyInternal();
    }


    /**
     * Provide a useful toString() implementation as it may be used when logging
     * Lifecycle errors to identify the component.
     */
    @Override
    public String toString() {
        // Not worth caching this right now
        StringBuilder sb = new StringBuilder("Connector[");
        sb.append(getProtocol());
        sb.append('-');
        int port = getPortWithOffset();
        if (port > 0) {
            sb.append(port);
        } else {
            sb.append("auto-");
            sb.append(getProperty("nameIndex"));
        }
        sb.append(']');
        return sb.toString();
    }


    // -------------------- JMX registration  --------------------

    @Override
    protected String getDomainInternal() {
        Service s = getService();
        if (s == null) {
            return null;
        } else {
            return service.getDomain();
        }
    }

    @Override
    protected String getObjectNameKeyProperties() {
        return createObjectNameKeyProperties("Connector");
    }

}
