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GeneratePresignedUrlAndUploadObject.java

GeneratePresignedUrlAndUploadObject.java demonstrates how to generate a presigned URL with the S3 Java SDK and use the URL to upload an object.

/** * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is 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/ * * 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.IOException; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.URL; import com.amazonaws.AmazonServiceException; import com.amazonaws.HttpMethod; import com.amazonaws.SdkClientException; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.services.s3.AmazonS3; import com.amazonaws.services.s3.AmazonS3ClientBuilder; import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest; import com.amazonaws.services.s3.model.S3Object; public class GeneratePresignedUrlAndUploadObject { public static void main(String[] args) throws IOException { String clientRegion = "*** Client region ***"; String bucketName = "*** Bucket name ***"; String objectKey = "*** Object key ***"; try { AmazonS3 s3Client = AmazonS3ClientBuilder.standard() .withCredentials(new ProfileCredentialsProvider()) .withRegion(clientRegion) .build(); // Set the pre-signed URL to expire after one hour. java.util.Date expiration = new java.util.Date(); long expTimeMillis = expiration.getTime(); expTimeMillis += 1000 * 60 * 60; expiration.setTime(expTimeMillis); // Generate the pre-signed URL. System.out.println("Generating pre-signed URL."); GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucketName, objectKey) .withMethod(HttpMethod.PUT) .withExpiration(expiration); URL url = s3Client.generatePresignedUrl(generatePresignedUrlRequest); // Create the connection and use it to upload the new object using the pre-signed URL. HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setDoOutput(true); connection.setRequestMethod("PUT"); OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream()); out.write("This text uploaded as an object via presigned URL."); out.close(); // Check the HTTP response code. To complete the upload and make the object available, // you must interact with the connection object in some way. connection.getResponseCode(); System.out.println("HTTP response code: " + connection.getResponseCode()); // Check to make sure that the object was uploaded successfully. S3Object object = s3Client.getObject(bucketName, objectKey); System.out.println("Object " + object.getKey() + " created in bucket " + object.getBucketName()); } catch(AmazonServiceException e) { // The call was transmitted successfully, but Amazon S3 couldn't process // it, so it returned an error response. e.printStackTrace(); } catch(SdkClientException e) { // Amazon S3 couldn't be contacted for a response, or the client // couldn't parse the response from Amazon S3. e.printStackTrace(); } } }

Sample Details

Service: s3

Last tested: 2019-01-28

Author: AWS

Type: full-example

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