S3Sample.java

/*
 * Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 */
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.UUID;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.S3ClientOptions;
import com.amazonaws.services.s3.model.Bucket;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.ListObjectsRequest;
import com.amazonaws.services.s3.model.ObjectListing;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.model.S3Object;
import com.amazonaws.services.s3.model.S3ObjectSummary;

/**
 * This sample demonstrates how to make basic requests to Amazon S3 using the
 * AWS SDK for Java.
 * <p>
 * <b>Prerequisites:</b> You must have a valid Amazon Web Services developer
 * account, and be signed up to use Amazon S3. For more information on Amazon
 * S3, see http://aws.amazon.com/s3.
 * <p>
 * Fill in your AWS access credentials in the provided credentials file
 * template, and be sure to move the file to the default location
 * (~/.aws/credentials) where the sample code will load the credentials from.
 * <p>
 * <b>WARNING:</b> To avoid accidental leakage of your credentials, DO NOT keep
 * the credentials file in your source directory.
 *
 * http://aws.amazon.com/security-credentials
 */
public class S3Sample {

    public static void main(String[] args) throws IOException {

        /*
         * The ProfileCredentialsProvider will return your [default]
         * credential profile by reading from the credentials file located at
         * (~/.aws/credentials).
         */
        AWSCredentials credentials = null;
        try {
            credentials = new ProfileCredentialsProvider().getCredentials();
        } catch (Exception e) {
            throw new AmazonClientException(
                    "Cannot load the credentials from the credential profiles file. " +
                    "Please make sure that your credentials file is at the correct " +
                    "location (~/.aws/credentials), and is in valid format.", e);
        }

        //        System.setProperty("org.apache.commons.logging.Log",
        //                           "org.apache.commons.logging.impl.NoOpLog");

        AmazonS3 s3 = new AmazonS3Client(credentials);
        //Region usWest2 = Region.getRegion(Regions.US_WEST_2);
        Region usEast1 = Region.getRegion(Regions.US_EAST_1);
        s3.setRegion(usEast1);
        s3.setEndpoint("http://localhost:9000");
        S3ClientOptions clientOptions = new S3ClientOptions();
        clientOptions.withPathStyleAccess(true);
        s3.setS3ClientOptions(clientOptions);

        String bucketName = "my-first-s3-bucket";// + UUID.randomUUID();
        String key = "MyObjectKey";

        System.out.println("===========================================");
        System.out.println("Getting Started with Amazon S3");
        System.out.println("===========================================\n");

        try {
            /*
             * Upload an object to your bucket - You can easily upload a file to
             * S3, or upload directly an InputStream if you know the length of
             * the data in the stream. You can also specify your own metadata
             * when uploading to S3, which allows you set a variety of options
             * like content-type and content-encoding, plus additional metadata
             * specific to your applications.
             */
            System.out.println("Uploading a new object to S3 from a file\n");
            s3.putObject(new PutObjectRequest(bucketName, key, createSampleFile()));
        } catch (AmazonServiceException ase) {
            System.out.println("Caught an AmazonServiceException, which means your request made it "
                    + "to Amazon S3, but was rejected with an error response for some reason.");
            System.out.println("Error Message:    " + ase.getMessage());
            System.out.println("HTTP Status Code: " + ase.getStatusCode());
            System.out.println("AWS Error Code:   " + ase.getErrorCode());
            System.out.println("Error Type:       " + ase.getErrorType());
            System.out.println("Request ID:       " + ase.getRequestId());
        } catch (AmazonClientException ace) {
            System.out.println("Caught an AmazonClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with S3, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }
    }

    /**
     * Creates a temporary file with text data to demonstrate uploading a file
     * to Amazon S3
     *
     * @return A newly created temporary file with text data.
     *
     * @throws IOException
     */
    private static File createSampleFile() throws IOException {
      File file = File.createTempFile("aws-java-sdk-", ".txt");
      file.deleteOnExit();
      Writer writer = new OutputStreamWriter(new FileOutputStream(file));
      writer.write("abcdefghijklmnopqrstuvwxyz\n");
      writer.write("01234567890112345678901234\n");
      writer.write("!@#$%^&*()-=[]{};':',.<>/?\n");
      writer.write("01234567890112345678901234\n");
      writer.write("abcdefghijklmnopqrstuvwxyz\n");
      writer.close();
      return file;
    }

    /**
     * Displays the contents of the specified input stream as text.
     *
     * @param input
     *            The input stream to display as text.
     *
     * @throws IOException
     */
    private static void displayTextInputStream(InputStream input) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(input));
        while (true) {
            String line = reader.readLine();
            if (line == null) break;
            System.out.println("    " + line);
        }
        System.out.println();
    }
}