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s3: unwrap SDK errors to reveal underlying errors on upload

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The SDK doesn't wrap errors in a Go standard way so they can't be
unwrapped and tested for - eg fatal error.

The code looks for a Serialization or RequestError and returns the
unwrapped underlying error if possible.

This fixes the fs/operations integration tests checking for fatal
errors being returned.
This commit is contained in:
Nick Craig-Wood 2022-06-17 14:34:57 +01:00
parent f829ded456
commit f7c36ce0f9
1 changed files with 34 additions and 0 deletions
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34
backend/s3/s3.go
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@ -4125,6 +4125,29 @@ func (o *Object) uploadMultipart(ctx context.Context, req *s3.PutObjectInput, si
return etag, nil
}
// unWrapAwsError unwraps AWS errors, looking for a non AWS error
//
// It returns true if one was found and the error, or false and the
// error passed in.
func unWrapAwsError(err error) (found bool, outErr error) {
if awsErr, ok := err.(awserr.Error); ok {
var origErrs []error
if batchErr, ok := awsErr.(awserr.BatchError); ok {
origErrs = batchErr.OrigErrs()
} else {
origErrs = []error{awsErr.OrigErr()}
}
for _, origErr := range origErrs {
found, newErr := unWrapAwsError(origErr)
if found {
return found, newErr
}
}
return false, err
}
return true, err
}
// Upload a single part using PutObject
func (o *Object) uploadSinglepartPutObject(ctx context.Context, req *s3.PutObjectInput, size int64, in io.Reader) (etag string, lastModified time.Time, err error) {
r, resp := o.fs.c.PutObjectRequest(req)
@ -4142,6 +4165,17 @@ func (o *Object) uploadSinglepartPutObject(ctx context.Context, req *s3.PutObjec
return o.fs.shouldRetry(ctx, err)
})
if err != nil {
// Return the underlying error if we have a
// Serialization or RequestError error if possible
//
// These errors are synthesized locally in the SDK
// (not returned from the server) and we'd rather have
// the underlying error if there is one.
if do, ok := err.(awserr.Error); ok && (do.Code() == request.ErrCodeSerialization || do.Code() == request.ErrCodeRequestError) {
if found, newErr := unWrapAwsError(err); found {
err = newErr
}
}
return etag, lastModified, err
}
lastModified = time.Now()