org.glassfish.jersey.client.filter.HttpBasicAuthFilter Maven / Gradle / Ivy

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package org.glassfish.jersey.client.filter;

import java.io.IOException;
import java.nio.charset.Charset;

import javax.ws.rs.client.ClientRequestContext;
import javax.ws.rs.client.ClientRequestFilter;
import javax.ws.rs.core.HttpHeaders;

import org.glassfish.jersey.internal.util.Base64;

/**
 * Client filter adding HTTP Basic Authentication header to the HTTP request,
 * if no such header is already present.
 *
 * @author Jakub Podlesak (jakub.podlesak at oracle.com)
 * @author Craig McClanahan
 */
public final class HttpBasicAuthFilter implements ClientRequestFilter {

    private final String authentication;
    private static final Charset CHARACTER_SET = Charset.forName("iso-8859-1");

    /**
     * Creates a new HTTP Basic Authentication filter using provided username
     * and password credentials.
     *
     * @param username user name
     * @param password password
     */
    public HttpBasicAuthFilter(String username, String password) {
        this(username, (password != null) ? password.getBytes(CHARACTER_SET) : new byte[0]);
    }

    /**
     * Creates a new HTTP Basic Authentication filter using provided username
     * and password credentials. This constructor allows you to avoid storing
     * plain password value in a String variable.
     *
     * @param username user name
     * @param password password
     */
    public HttpBasicAuthFilter(String username, byte[] password) {
        if(username == null) {
            username = "";
        }

        if(password == null) {
            password = new byte[0];
        }

        final byte[] prefix = (username + ":").getBytes(CHARACTER_SET);
        final byte[] usernamePassword = new byte[prefix.length + password.length];

        System.arraycopy(prefix, 0, usernamePassword, 0, prefix.length);
        System.arraycopy(password, 0, usernamePassword, prefix.length, password.length);

        authentication = "Basic " + Base64.encodeAsString(usernamePassword);
    }

    @Override
    public void filter(ClientRequestContext rc) throws IOException {
        if (!rc.getHeaders().containsKey(HttpHeaders.AUTHORIZATION)) {
            rc.getHeaders().add(HttpHeaders.AUTHORIZATION, authentication);
        }
    }
}