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Amazon Simple Storage Service
開発者ガイド (API バージョン 2006-03-01)

AWS SDK for Java を使用した Cross-Origin Resource Sharing (CORS) の有効化

AWS SDK for Java を使用して、バケットの Cross-Origin Resource Sharing (CORS) を管理できます。CORS の詳細については、「Cross-Origin Resource Sharing (CORS)」を参照してください。

以下の例:

  • CORS 設定を作成し、バケット上で設定を指定する

  • 設定を取得し、ルールを追加してその設定を変更する

  • 変更された設定をバケットに追加する

  • 設定を削除する

作業サンプルを作成およびテストする方法については、「Amazon S3 Java コード例のテスト」を参照してください。

import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import com.amazonaws.AmazonServiceException; 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.BucketCrossOriginConfiguration; import com.amazonaws.services.s3.model.CORSRule; public class CORS { public static void main(String[] args) throws IOException { String clientRegion = "*** Client region ***"; String bucketName = "*** Bucket name ***"; // Create two CORS rules. List<CORSRule.AllowedMethods> rule1AM = new ArrayList<CORSRule.AllowedMethods>(); rule1AM.add(CORSRule.AllowedMethods.PUT); rule1AM.add(CORSRule.AllowedMethods.POST); rule1AM.add(CORSRule.AllowedMethods.DELETE); CORSRule rule1 = new CORSRule().withId("CORSRule1").withAllowedMethods(rule1AM) .withAllowedOrigins(Arrays.asList(new String[] { "http://*.example.com" })); List<CORSRule.AllowedMethods> rule2AM = new ArrayList<CORSRule.AllowedMethods>(); rule2AM.add(CORSRule.AllowedMethods.GET); CORSRule rule2 = new CORSRule().withId("CORSRule2").withAllowedMethods(rule2AM) .withAllowedOrigins(Arrays.asList(new String[] { "*" })).withMaxAgeSeconds(3000) .withExposedHeaders(Arrays.asList(new String[] { "x-amz-server-side-encryption" })); List<CORSRule> rules = new ArrayList<CORSRule>(); rules.add(rule1); rules.add(rule2); // Add the rules to a new CORS configuration. BucketCrossOriginConfiguration configuration = new BucketCrossOriginConfiguration(); configuration.setRules(rules); try { AmazonS3 s3Client = AmazonS3ClientBuilder.standard() .withCredentials(new ProfileCredentialsProvider()) .withRegion(clientRegion) .build(); // Add the configuration to the bucket. s3Client.setBucketCrossOriginConfiguration(bucketName, configuration); // Retrieve and display the configuration. configuration = s3Client.getBucketCrossOriginConfiguration(bucketName); printCORSConfiguration(configuration); // Add another new rule. List<CORSRule.AllowedMethods> rule3AM = new ArrayList<CORSRule.AllowedMethods>(); rule3AM.add(CORSRule.AllowedMethods.HEAD); CORSRule rule3 = new CORSRule().withId("CORSRule3").withAllowedMethods(rule3AM) .withAllowedOrigins(Arrays.asList(new String[] { "http://www.example.com" })); rules = configuration.getRules(); rules.add(rule3); configuration.setRules(rules); s3Client.setBucketCrossOriginConfiguration(bucketName, configuration); // Verify that the new rule was added by checking the number of rules in the configuration. configuration = s3Client.getBucketCrossOriginConfiguration(bucketName); System.out.println("Expected # of rules = 3, found " + configuration.getRules().size()); // Delete the configuration. s3Client.deleteBucketCrossOriginConfiguration(bucketName); System.out.println("Removed CORS configuration."); // Retrieve and display the configuration to verify that it was // successfully deleted. configuration = s3Client.getBucketCrossOriginConfiguration(bucketName); printCORSConfiguration(configuration); } 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(); } } private static void printCORSConfiguration(BucketCrossOriginConfiguration configuration) { if (configuration == null) { System.out.println("Configuration is null."); } else { System.out.println("Configuration has " + configuration.getRules().size() + " rules\n"); for (CORSRule rule : configuration.getRules()) { System.out.println("Rule ID: " + rule.getId()); System.out.println("MaxAgeSeconds: " + rule.getMaxAgeSeconds()); System.out.println("AllowedMethod: " + rule.getAllowedMethods()); System.out.println("AllowedOrigins: " + rule.getAllowedOrigins()); System.out.println("AllowedHeaders: " + rule.getAllowedHeaders()); System.out.println("ExposeHeader: " + rule.getExposedHeaders()); System.out.println(); } } } }