dtu.ds.warnme.app.ws.client.https.ssl.PreemptiveAuthenticationRequestInterceptor.java Source code

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Here is the source code for dtu.ds.warnme.app.ws.client.https.ssl.PreemptiveAuthenticationRequestInterceptor.java

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/**
 * Project:   warnme-app
 * File:      PreemptiveAuthenticationRequestInterceptor.java
 * License: 
 *            This file is licensed under GNU General Public License version 3
 *            http://www.gnu.org/licenses/gpl-3.0.txt
 *
 * Copyright: Bartosz Cichecki [ cichecki.bartosz@gmail.com ]
 * Date:      Mar 27, 2014
 */

package dtu.ds.warnme.app.ws.client.https.ssl;

import java.io.IOException;

import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.AuthState;
import org.apache.http.auth.Credentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;

/**
 * @author Bartosz Cichecki
 * 
 */
public class PreemptiveAuthenticationRequestInterceptor implements HttpRequestInterceptor {

    @Override
    public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {
        AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);
        CredentialsProvider credsProvider = (CredentialsProvider) context
                .getAttribute(ClientContext.CREDS_PROVIDER);
        HttpHost targetHost = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);

        if (authState.getAuthScheme() == null) {
            AuthScope authScope = new AuthScope(targetHost.getHostName(), targetHost.getPort());
            Credentials creds = credsProvider.getCredentials(authScope);
            if (creds != null) {
                authState.setAuthScheme(new BasicScheme());
                authState.setCredentials(creds);
            }
        }
    }

}