Java example source code file (ClientInteractiveAuthentication.java)

This example source code file (ClientInteractiveAuthentication.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java tags/keywords

authscope, authstate, basichttpcontext, bufferedreader, clientinteractiveauthentication, credentials, defaulthttpclient, enter, httpcontext, httpentity, httpget, httpresponse, io, string, usernamepasswordcredentials

The ClientInteractiveAuthentication.java example source code

/*
 * ====================================================================
 *
 *  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/>.
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */

package org.apache.http.examples.client;

import java.io.BufferedReader;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.AuthState;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;

/**
 * A simple example that uses HttpClient to execute an HTTP request against
 * a target site that requires user authentication. 
 */
public class ClientInteractiveAuthentication {

    public static void main(String[] args) throws Exception {
        DefaultHttpClient httpclient = new DefaultHttpClient();

        // Create local execution context
        HttpContext localContext = new BasicHttpContext();

        HttpGet httpget = new HttpGet("http://localhost/test");
        
        boolean trying = true;
        while (trying) {
            System.out.println("executing request " + httpget.getRequestLine());
            HttpResponse response = httpclient.execute(httpget, localContext);

            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());

            // Consume response content
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                entity.consumeContent();
            }
            
            int sc = response.getStatusLine().getStatusCode();
            
            AuthState authState = null;
            if (sc == HttpStatus.SC_UNAUTHORIZED) {
                // Target host authentication required
                authState = (AuthState) localContext.getAttribute(ClientContext.TARGET_AUTH_STATE);
            } 
            if (sc == HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED) {
                // Proxy authentication required
                authState = (AuthState) localContext.getAttribute(ClientContext.PROXY_AUTH_STATE);
            }
            
            if (authState != null) {
                System.out.println("----------------------------------------");
                AuthScope authScope = authState.getAuthScope();
                System.out.println("Please provide credentials");
                System.out.println(" Host: " + authScope.getHost() + ":" + authScope.getPort());
                System.out.println(" Realm: " + authScope.getRealm());
                
                
                BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
                
                System.out.print("Enter username: ");
                String user = console.readLine();   
                System.out.print("Enter password: ");
                String password = console.readLine();
                
                if (user != null && user.length() > 0) {
                    Credentials creds = new UsernamePasswordCredentials(user, password);
                    httpclient.getCredentialsProvider().setCredentials(authScope, creds);
                    trying = true;
                } else {
                    trying = false;
                }
            } else {
                trying = false;
            }
        }

        // When HttpClient instance is no longer needed, 
        // shut down the connection manager to ensure
        // immediate deallocation of all system resources
        httpclient.getConnectionManager().shutdown();        
    }
}