java - 当 `PutObjectRequest`的userMetaData中有中文字符时AWS S3错误

Question

如果我的 PutObjectRequest 的 userMetaData 值中有中文字符:

我会收到 400 错误请求:

com.amazonaws.services.s3.model.AmazonS3Exception: Bad Request (Service: Amazon S3; Status Code: 400; Error Code: 400 Bad Request; Request ID: null; S3 Extended Request ID: null)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1587)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1257)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1029)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:741)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:715)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:697)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:665)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:647)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:511)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4227)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4174)
    at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1722)

下面是不同汉字的:

导致 403 错误:

com.amazonaws.services.s3.model.AmazonS3Exception: Forbidden (Service: Amazon S3; Status Code: 403; Error Code: 403 Forbidden; Request ID: 1C11613460118BAE; S3 Extended Request ID: 6iq+ertFiYjXgJJhKWTFr6qhSenkwqk3OOp05xYaIlp6jrlsWJK8PQhoGSiWYAu2CFbLK5X5zEw=)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1587)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1257)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1029)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:741)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:715)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:697)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:665)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:647)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:511)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4227)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4174)
    at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1722)

请注意，如果 userMetaData 中没有中文字符，则一切正常。

我的 AWS 开发工具包版本是 1.11.177

Answer 1

这不是一个可报告的错误...它是 S3 REST 接口(interface)中记录的限制。

User-defined metadata is a set of key-value pairs. Amazon S3 stores user-defined metadata keys in lowercase. Each key-value pair must conform to US-ASCII when using REST and UTF-8 when using SOAP or browser-based uploads via POST. (Emphasis added.)

http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMetadata.html#object-metadata

SOAP 已被弃用(更不用说糟糕了)，尽管 POST 上传允许您在元数据中存储 UTF-8 字符，但不要这样做，因为您可能无法使用该对象或读回该对象元数据。

与对象元数据相比，对象标记确实支持UTF-8。

A tag key can be up to 128 Unicode characters in length and tag values can be up to 256 Unicode characters in length.

http://docs.aws.amazon.com/AmazonS3/latest/dev/object-tagging.html