org.apache.flink.cloudsort.io.aws.AwsCurlInput.java Source code

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Here is the source code for org.apache.flink.cloudsort.io.aws.AwsCurlInput.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.cloudsort.io.aws;

import com.amazonaws.HttpMethod;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest;
import org.apache.flink.util.Preconditions;

import java.io.IOException;
import java.lang.ProcessBuilder.Redirect;

/**
 * Uses curl to stream a signed URL.
 */
public class AwsCurlInput extends AwsInput {

    private static final String CONTENT_TYPE = "application/octet-stream";

    @Override
    public void open(String objectName) throws IOException {
        Preconditions.checkNotNull(bucket);

        AmazonS3 s3Client = new AmazonS3Client(new ProfileCredentialsProvider());

        java.util.Date expiration = new java.util.Date();
        long msec = expiration.getTime();
        msec += 1000 * 60 * 60; // Add 1 hour.
        expiration.setTime(msec);

        GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucket,
                objectName);
        generatePresignedUrlRequest.setMethod(HttpMethod.GET);
        generatePresignedUrlRequest.setContentType(CONTENT_TYPE);
        generatePresignedUrlRequest.setExpiration(expiration);

        String url = s3Client.generatePresignedUrl(generatePresignedUrlRequest).toExternalForm();

        downloader = new ProcessBuilder("curl", "-s", "-X", "GET", "-H", "Content-Type: " + CONTENT_TYPE, url)
                .redirectError(Redirect.INHERIT).start();
    }
}