Basic Auth support

Just sharing solution which I implemented for basic auth.

package com.kegs.v4.custom;

import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.HttpClientBuilder;
import org.mitre.dsmiley.httpproxy.ProxyServlet;

import javax.servlet.ServletException;

public class HttpBasicAuthProxyServlet extends ProxyServlet {

protected static final String P_AUTH_BASIC_USERNAME = "authBasicUsername";
protected static final String P_AUTH_BASIC_PASSWORD = "authBasicPassword";

private String authBasicPassword;
private String authBasicUsername;
@Override
public void init() throws ServletException {

    String doLogStr = getServletConfig().getInitParameter(P_LOG);
    if (doLogStr != null) {
        this.doLog = Boolean.parseBoolean(doLogStr);
    }

    String doForwardIPString = getServletConfig().getInitParameter(P_FORWARDEDFOR);
    if (doForwardIPString != null) {
        this.doForwardIP = Boolean.parseBoolean(doForwardIPString);
    }
    initAuthBasic();
    initTarget();

    proxyClient = createHttpClient();
}

private void initAuthBasic() throws ServletException{
    authBasicPassword = getServletConfig().getInitParameter(P_AUTH_BASIC_PASSWORD);
    authBasicUsername = getServletConfig().getInitParameter(P_AUTH_BASIC_USERNAME);

    if (authBasicPassword == null) {
        throw new ServletException(P_AUTH_BASIC_PASSWORD+" is required.");
    }

    if (authBasicUsername == null) {
        throw new ServletException(P_AUTH_BASIC_USERNAME+" is required.");
    }

}

protected HttpClient createHttpClient() {
    BasicCredentialsProvider provider = new BasicCredentialsProvider();
    UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(authBasicUsername, authBasicPassword);
    provider.setCredentials(AuthScope.ANY, credentials);

    RequestConfig requestConfig = RequestConfig.custom().setRedirectsEnabled(true).build();
    HttpClient client = HttpClientBuilder.create().setDefaultRequestConfig(requestConfig).setDefaultCredentialsProvider(provider).build();

    return client;
}

}

No repository file or test is named. Start by reading the existing ProxyServlet initialization and HTTP-client creation entry points, then compare them with the supplied HttpBasicAuthProxyServlet example. The issue does not state a test or explicit completion criterion, so the expected integration and verification still need clarification.