fef5416b3c
Different gateway implementations due to different backend API errors, might return different unsupported errors at our handler layer. Current code posed a problem for us because this information was lost and we would convert it to InternalError in this situation all S3 clients end up retrying the request. To avoid this unexpected situation implement a way to support this cleanly such that the underlying information is not lost which is returned by gateway.
60 lines
2.1 KiB
Go
60 lines
2.1 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"net/http"
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)
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// Represents additional fields necessary for ErrPartTooSmall S3 error.
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type completeMultipartAPIError struct {
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// Proposed size represents uploaded size of the part.
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ProposedSize int64
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// Minimum size allowed epresents the minimum size allowed per
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// part. Defaults to 5MB.
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MinSizeAllowed int64
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// Part number of the part which is incorrect.
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PartNumber int
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// ETag of the part which is incorrect.
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PartETag string
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// Other default XML error responses.
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APIErrorResponse
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}
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// writeErrorResponsePartTooSmall - function is used specifically to
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// construct a proper error response during CompleteMultipartUpload
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// when one of the parts is < 5MB.
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// The requirement comes due to the fact that generic ErrorResponse
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// XML doesn't carry the additional fields required to send this
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// error. So we construct a new type which lies well within the scope
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// of this function.
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func writePartSmallErrorResponse(w http.ResponseWriter, r *http.Request, err PartTooSmall) {
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apiError := toAPIError(context.Background(), err)
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// Generate complete multipart error response.
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errorResponse := getAPIErrorResponse(apiError, r.URL.Path, w.Header().Get(responseRequestIDKey))
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cmpErrResp := completeMultipartAPIError{err.PartSize, int64(5242880), err.PartNumber, err.PartETag, errorResponse}
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encodedErrorResponse := encodeResponse(cmpErrResp)
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// respond with 400 bad request.
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w.WriteHeader(apiError.HTTPStatusCode)
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// Write error body.
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w.Write(encodedErrorResponse)
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w.(http.Flusher).Flush()
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}
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