OAuthSignatureCalculator.java

/*
 * Copyright (c) 2016 AsyncHttpClient Project. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at
 *     http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */
package org.asynchttpclient.oauth;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import org.asynchttpclient.Request;
import org.asynchttpclient.RequestBuilderBase;
import org.asynchttpclient.SignatureCalculator;

/**
 * OAuth {@link SignatureCalculator} that delegates to {@link OAuthSignatureCalculatorInstance}s.
 */
public class OAuthSignatureCalculator implements SignatureCalculator {

    private static final ThreadLocal<OAuthSignatureCalculatorInstance> INSTANCES = new ThreadLocal<OAuthSignatureCalculatorInstance>() {
        protected OAuthSignatureCalculatorInstance initialValue() {
            try {
                return new OAuthSignatureCalculatorInstance();
            } catch (NoSuchAlgorithmException e) {
                throw new ExceptionInInitializerError(e);
            }
        };
    };

    private final ConsumerKey consumerAuth;

    private final RequestToken userAuth;

    /**
     * @param consumerAuth Consumer key to use for signature calculation
     * @param userAuth Request/access token to use for signature calculation
     */
    public OAuthSignatureCalculator(ConsumerKey consumerAuth, RequestToken userAuth) {
        this.consumerAuth = consumerAuth;
        this.userAuth = userAuth;
    }

    @Override
    public void calculateAndAddSignature(Request request, RequestBuilderBase<?> requestBuilder) {
        try {
            INSTANCES.get().sign(consumerAuth, userAuth, request, requestBuilder);
        } catch (InvalidKeyException e) {
            throw new IllegalArgumentException("Failed to compute a valid key from consumer and user secrets", e);
        }
    }
}