/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package sun.net.www.protocol.https;

import java.net.URL;

import java.net.Proxy;

import java.net.SecureCacheResponse;

import java.security.Principal;

import java.io.IOException;

import java.util.List;

import java.util.Optional;

import javax.net.ssl.SSLSession;

import javax.net.ssl.SSLPeerUnverifiedException;

import sun.net.www.http.*;

import sun.net.www.protocol.http.HttpURLConnection;

/**

 * HTTPS URL connection support.

 * We need this delegate because HttpsURLConnection is a subclass of

 * java.net.HttpURLConnection. We will avoid copying over the code from

 * sun.net.www.protocol.http.HttpURLConnection by having this class

 *

 */

public abstract class AbstractDelegateHttpsURLConnection extends

        HttpURLConnection {

    protected AbstractDelegateHttpsURLConnection(URL url,

            sun.net.www.protocol.http.Handler handler) throws IOException {

        this(url, null, handler);

    }

    protected AbstractDelegateHttpsURLConnection(URL url, Proxy p,

            sun.net.www.protocol.http.Handler handler) throws IOException {

        super(url, p, handler);

    }

    protected abstract javax.net.ssl.SSLSocketFactory getSSLSocketFactory();

    protected abstract javax.net.ssl.HostnameVerifier getHostnameVerifier();

    /**

     * No user application is able to call these routines, as no one

     * should ever get access to an instance of

     * DelegateHttpsURLConnection (sun.* or com.*)

     */

    /**

     * Create a new HttpClient object, bypassing the cache of

     * HTTP client objects/connections.

     *

     * @param url the URL being accessed

     */

    public void setNewClient (URL url)

        throws IOException {

        setNewClient (url, false);

    }

    /**

     * Obtain a HttpClient object. Use the cached copy if specified.

     *

     * @param url       the URL being accessed

     * @param useCache  whether the cached connection should be used

     *        if present

     */

    public void setNewClient (URL url, boolean useCache)

        throws IOException {

        http = HttpsClient.New (getSSLSocketFactory(),

                                url,

                                getHostnameVerifier(),

                                useCache, this);

        ((HttpsClient)http).afterConnect();

    }

    /**

     * Create a new HttpClient object, set up so that it uses

     * per-instance proxying to the given HTTP proxy.  This

     * bypasses the cache of HTTP client objects/connections.

     *

     * @param url       the URL being accessed

     * @param proxyHost the proxy host to use

     * @param proxyPort the proxy port to use

     */

    public void setProxiedClient (URL url, String proxyHost, int proxyPort)

            throws IOException {

        setProxiedClient(url, proxyHost, proxyPort, false);

    }

    /**

     * Obtain a HttpClient object, set up so that it uses per-instance

     * proxying to the given HTTP proxy. Use the cached copy of HTTP

     * client objects/connections if specified.

     *

     * @param url       the URL being accessed

     * @param proxyHost the proxy host to use

     * @param proxyPort the proxy port to use

     * @param useCache  whether the cached connection should be used

     *        if present

     */

    public void setProxiedClient (URL url, String proxyHost, int proxyPort,

            boolean useCache) throws IOException {

        proxiedConnect(url, proxyHost, proxyPort, useCache);

        if (!http.isCachedConnection()) {

            doTunneling();

        }

        ((HttpsClient)http).afterConnect();

    }

    protected void proxiedConnect(URL url, String proxyHost, int proxyPort,

            boolean useCache) throws IOException {

        if (connected)

            return;

        http = HttpsClient.New (getSSLSocketFactory(),

                                url,

                                getHostnameVerifier(),

                                proxyHost, proxyPort, useCache, this);

        connected = true;

    }

    /**

     * Used by subclass to access "connected" variable.

     */

    public boolean isConnected() {

        return connected;

    }

    /**

     * Used by subclass to access "connected" variable.

     */

    public void setConnected(boolean conn) {

        connected = conn;

    }

    /**

     * Implements the HTTP protocol handler's "connect" method,

     * establishing an SSL connection to the server as necessary.

     */

    public void connect() throws IOException {

        if (connected)

            return;

        plainConnect();

        if (cachedResponse != null) {

            // using cached response

            return;

        }

        if (!http.isCachedConnection() && http.needsTunneling()) {

            doTunneling();

        }

        ((HttpsClient)http).afterConnect();

    }

    // will try to use cached HttpsClient

    protected HttpClient getNewHttpClient(URL url, Proxy p, int connectTimeout)

        throws IOException {

        return HttpsClient.New(getSSLSocketFactory(), url,

                               getHostnameVerifier(), p, true, connectTimeout,

                               this);

    }

    // will open new connection

    protected HttpClient getNewHttpClient(URL url, Proxy p, int connectTimeout,

                                          boolean useCache)

        throws IOException {

        return HttpsClient.New(getSSLSocketFactory(), url,

                               getHostnameVerifier(), p,

                               useCache, connectTimeout, this);

    }

    /**

     * Returns the cipher suite in use on this connection.

     */

    public String getCipherSuite () {

        if (cachedResponse != null) {

            return ((SecureCacheResponse)cachedResponse).getCipherSuite();

        }

        if (http == null) {

            throw new IllegalStateException("connection not yet open");

        } else {

           return ((HttpsClient)http).getCipherSuite ();

        }

    }

    /**

     * Returns the certificate chain the client sent to the

     * server, or null if the client did not authenticate.

     */

    public java.security.cert.Certificate[] getLocalCertificates() {

        if (cachedResponse != null) {

            List<java.security.cert.Certificate> l = ((SecureCacheResponse)cachedResponse).getLocalCertificateChain();

            if (l == null) {

                return null;

            } else {

                return l.toArray(new java.security.cert.Certificate[0]);

            }

        }

        if (http == null) {

            throw new IllegalStateException("connection not yet open");

        } else {

            return (((HttpsClient)http).getLocalCertificates ());

        }

    }

    /**

     * Returns the server's certificate chain, or throws

     * SSLPeerUnverified Exception if

     * the server did not authenticate.

     */

    public java.security.cert.Certificate[] getServerCertificates()

            throws SSLPeerUnverifiedException {

        if (cachedResponse != null) {

            List<java.security.cert.Certificate> l =

                    ((SecureCacheResponse)cachedResponse)

                            .getServerCertificateChain();

            if (l == null) {

                return null;

            } else {

                return l.toArray(new java.security.cert.Certificate[0]);

            }

        }

        if (http == null) {

            throw new IllegalStateException("connection not yet open");

        } else {

            return (((HttpsClient)http).getServerCertificates ());

        }

    }

    /**

     * Returns the server's principal, or throws SSLPeerUnverifiedException

     * if the server did not authenticate.

     */

    Principal getPeerPrincipal()

            throws SSLPeerUnverifiedException

    {

        if (cachedResponse != null) {

            return ((SecureCacheResponse)cachedResponse).getPeerPrincipal();

        }

        if (http == null) {

            throw new IllegalStateException("connection not yet open");

        } else {

            return (((HttpsClient)http).getPeerPrincipal());

        }

    }

    /**

     * Returns the principal the client sent to the

     * server, or null if the client did not authenticate.

     */

    Principal getLocalPrincipal()

    {

        if (cachedResponse != null) {

            return ((SecureCacheResponse)cachedResponse).getLocalPrincipal();

        }

        if (http == null) {

            throw new IllegalStateException("connection not yet open");

        } else {

            return (((HttpsClient)http).getLocalPrincipal());

        }

    }

    SSLSession getSSLSession() {

        if (cachedResponse != null) {

            Optional<SSLSession> option =

                    ((SecureCacheResponse)cachedResponse).getSSLSession();

            if (option.isPresent()) {

                return option.orElseThrow();

            }

        }

        if (http == null) {

            throw new IllegalStateException("connection not yet open");

        }

        return ((HttpsClient)http).getSSLSession();

    }

}