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| 1 | +/* |
| 2 | + * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"). |
| 5 | + * You may not use this file except in compliance with the License. |
| 6 | + * A copy of the License is located at |
| 7 | + * |
| 8 | + * http://aws.amazon.com/apache2.0 |
| 9 | + * |
| 10 | + * or in the "license" file accompanying this file. This file is distributed |
| 11 | + * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| 12 | + * express or implied. See the License for the specific language governing |
| 13 | + * permissions and limitations under the License. |
| 14 | + */ |
| 15 | + |
| 16 | +package software.amazon.awssdk.services.s3.internal.handlers; |
| 17 | + |
| 18 | +import java.util.Optional; |
| 19 | +import software.amazon.awssdk.annotations.SdkInternalApi; |
| 20 | +import software.amazon.awssdk.core.SdkResponse; |
| 21 | +import software.amazon.awssdk.core.interceptor.Context; |
| 22 | +import software.amazon.awssdk.core.interceptor.ExecutionAttributes; |
| 23 | +import software.amazon.awssdk.core.interceptor.ExecutionInterceptor; |
| 24 | +import software.amazon.awssdk.http.SdkHttpResponse; |
| 25 | +import software.amazon.awssdk.services.s3.model.GetObjectRequest; |
| 26 | +import software.amazon.awssdk.services.s3.model.GetObjectResponse; |
| 27 | + |
| 28 | +/** |
| 29 | + * Interceptor for {@link GetObjectRequest} messages. |
| 30 | + */ |
| 31 | +@SdkInternalApi |
| 32 | +public class GetObjectInterceptor implements ExecutionInterceptor { |
| 33 | + @Override |
| 34 | + public SdkResponse modifyResponse(Context.ModifyResponse context, ExecutionAttributes executionAttributes) { |
| 35 | + SdkResponse response = context.response(); |
| 36 | + if (!(response instanceof GetObjectResponse)) { |
| 37 | + return response; |
| 38 | + } |
| 39 | + |
| 40 | + return fixContentRange(response, context.httpResponse()); |
| 41 | + } |
| 42 | + |
| 43 | + /** |
| 44 | + * S3 currently returns content-range in two possible headers: Content-Range or x-amz-content-range based on the x-amz-te |
| 45 | + * in the request. This will check the x-amz-content-range if the modeled header (Content-Range) wasn't populated. |
| 46 | + */ |
| 47 | + private SdkResponse fixContentRange(SdkResponse sdkResponse, SdkHttpResponse httpResponse) { |
| 48 | + // Use the modeled content range header, if the service returned it. |
| 49 | + GetObjectResponse getObjectResponse = (GetObjectResponse) sdkResponse; |
| 50 | + if (getObjectResponse.contentRange() != null) { |
| 51 | + return getObjectResponse; |
| 52 | + } |
| 53 | + |
| 54 | + // If the service didn't use the modeled content range header, check the x-amz-content-range header. |
| 55 | + Optional<String> xAmzContentRange = httpResponse.firstMatchingHeader("x-amz-content-range"); |
| 56 | + if (!xAmzContentRange.isPresent()) { |
| 57 | + return getObjectResponse; |
| 58 | + } |
| 59 | + |
| 60 | + return getObjectResponse.copy(r -> r.contentRange(xAmzContentRange.get())); |
| 61 | + } |
| 62 | +} |
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