Is there a way to parse S3 error response?

[pvgoran]

I'm experimenting with the library, and I get error responses from Amazon S3 in certain circumstances. The error response text is like this:

<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Error><Code>PermanentRedirect</Code><Message>The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint.</Message><Endpoint>s3.amazonaws.com</Endpoint><Bucket>...</Bucket><RequestId>...</RequestId><HostId>...</HostId></Error>

Now, I'm using examples/list_objects.rs as a basis for my code. The response status here is 301, so error_for_status() doesn't catch it, and the subsequent ListObjectsV2::parse_response() call on the response text produces a non-helpful error Custom("missing field `MaxKeys`").

Apparently I need to do more error handling: maybe make sure that the error code is always from the 2xx range, or "catch" parse errors and try to interpret the response as a error response. In any case, I need some way to parse the error response XML like the one I cited above. Is there any facility in rusty-s3 that would help me with it? I couldn't find any.

I think the library should have a error response type like ErrorResponse and a function to parse it, like parse_error_response. Maybe request objects should also have methods like parse_response_or_error that would automatically recognize, parse and return error responses.