se.vgregion.pubsub.twitter.impl.PreemptiveBasicAuth.java Source code

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Here is the source code for se.vgregion.pubsub.twitter.impl.PreemptiveBasicAuth.java

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/**
 * Copyright 2010 Vstra Gtalandsregionen
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of version 2.1 of the GNU Lesser General Public
 *   License as published by the Free Software Foundation.
 *
 *   This library 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the
 *   Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *   Boston, MA 02111-1307  USA
 *
 */

package se.vgregion.pubsub.twitter.impl;

import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.auth.AuthState;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.protocol.HttpContext;

/**
 * Interceptor which authenticates an HTTP request directly
 *
 */
public class PreemptiveBasicAuth implements HttpRequestInterceptor {

    private String username;
    private String password;

    public PreemptiveBasicAuth(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public void process(HttpRequest request, HttpContext context) {
        AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);

        // If not auth scheme has been initialized yet
        if (authState.getAuthScheme() == null) {
            Credentials creds = new UsernamePasswordCredentials(username, password);
            authState.setAuthScheme(new BasicScheme());
            authState.setCredentials(creds);
        }
    }
}