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A web service test double for all occasions - standalone edition

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/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * Licensed 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.
 */
package com.github.tomakehurst.wiremock.security;

import com.github.tomakehurst.wiremock.client.BasicCredentials;
import com.github.tomakehurst.wiremock.http.Request;
import com.google.common.base.Function;
import com.google.common.collect.FluentIterable;

import java.util.List;

import static com.google.common.net.HttpHeaders.AUTHORIZATION;
import static java.util.Arrays.asList;

public class BasicAuthenticator implements Authenticator {

    private final List credentials;

    public BasicAuthenticator(List credentials) {
        this.credentials = credentials;
    }

    public BasicAuthenticator(BasicCredentials... credentials) {
        this.credentials = asList(credentials);
    }

    public BasicAuthenticator(String username, String password) {
        this(new BasicCredentials(username, password));
    }

    @Override
    public boolean authenticate(Request request) {
        List headerValues = FluentIterable.from(credentials).transform(new Function() {
            @Override
            public String apply(BasicCredentials input) {
                return input.asAuthorizationHeaderValue();
            }
        }).toList();
        return request.containsHeader(AUTHORIZATION) &&
               headerValues.contains(request.header(AUTHORIZATION).firstValue());
    }
}