com.karumi.marvelapiclient.AuthInterceptor.java Source code

Introduction

Here is the source code for com.karumi.marvelapiclient.AuthInterceptor.java

Source

/*
 *   Copyright (C) 2015 Karumi.
 *   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.karumi.marvelapiclient;

import com.squareup.okhttp.HttpUrl;
import com.squareup.okhttp.Interceptor;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import java.io.IOException;

class AuthInterceptor implements Interceptor {
    private static final String TIMESTAMP_KEY = "ts";
    private static final String HASH_KEY = "hash";
    private static final String APIKEY_KEY = "apikey";

    private final String publicKey;
    private final String privateKey;
    private final TimeProvider timeProvider;
    private final AuthHashGenerator authHashGenerator = new AuthHashGenerator();

    AuthInterceptor(String publicKey, String privateKey, TimeProvider timeProvider) {
        this.publicKey = publicKey;
        this.privateKey = privateKey;
        this.timeProvider = timeProvider;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        String timestamp = String.valueOf(timeProvider.currentTimeMillis());
        String hash = null;
        try {
            hash = authHashGenerator.generateHash(timestamp, publicKey, privateKey);
        } catch (MarvelApiException e) {
            e.printStackTrace();
        }
        Request request = chain.request();
        HttpUrl url = request.httpUrl().newBuilder().addQueryParameter(TIMESTAMP_KEY, timestamp)
                .addQueryParameter(APIKEY_KEY, publicKey).addQueryParameter(HASH_KEY, hash).build();
        request = request.newBuilder().url(url).build();
        return chain.proceed(request);
    }
}