es.tsb.ltba.nomhad.httpclient.NomhadHttpClient.java Source code

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Here is the source code for es.tsb.ltba.nomhad.httpclient.NomhadHttpClient.java

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package es.tsb.ltba.nomhad.httpclient;

/*
 * ====================================================================
 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

/**
 * Implementation of the Apache HttpComponents httpClient.
 * 
 */
public class NomhadHttpClient {

    private DefaultHttpClient httpClient;

    /**
     * Creates a HttpClient without authentication
     */
    public NomhadHttpClient() {
        httpClient = new DefaultHttpClient();
        httpClient = wrapClient(httpClient);
    }

    /**
     * Creates a HttpClient with authentication
     * 
     * @param usr
     *            user
     * @param pwd
     *            password
     */
    public NomhadHttpClient(String usr, String pwd) {
        this();
        this.setCredentials(usr, pwd);
    }

    /**
     * Set the credentials, if the client was created without them.
     * 
     * @param usr
     *            user
     * @param pwd
     *            password
     */
    public void setCredentials(String usr, String pwd) {
        httpClient.getCredentialsProvider().setCredentials(new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT),
                new UsernamePasswordCredentials(usr, pwd));
    }

    /**
     * Http POST request.
     * 
     * @param uri
     *            URI
     * @param body
     *            body
     * @return response from server
     * @throws ClientProtocolException
     * @throws IOException
     */
    public String post(String uri, String body) throws ClientProtocolException, IOException {
        HttpPost post = new HttpPost(uri);
        if (body != null) {
            post.setEntity(new StringEntity(body));
        }
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        return httpClient.execute(post, responseHandler);
    }

    /**
     * stop the http client
     */
    public void stopClient() {
        httpClient.getConnectionManager().shutdown();
    }

    /**
     * Authentication
     * 
     * @param base
     *            the client to be configured
     * @return the authentication-enabled client
     */
    private static DefaultHttpClient wrapClient(HttpClient base) {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {

                public void checkClientTrusted(X509Certificate[] xcs, String string) throws CertificateException {
                }

                public void checkServerTrusted(X509Certificate[] xcs, String string) throws CertificateException {
                }

                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
            };
            ctx.init(null, new TrustManager[] { tm }, null);
            SSLSocketFactory ssf = new SSLSocketFactory(ctx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            ClientConnectionManager ccm = base.getConnectionManager();
            SchemeRegistry sr = ccm.getSchemeRegistry();
            sr.register(new Scheme("https", 443, ssf));
            return new DefaultHttpClient(ccm, base.getParams());
        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }
    }

}