cubefs

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// Copyright 2022 The CubeFS Authors.
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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
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// implied. See the License for the specific language governing
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// permissions and limitations under the License.
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package rpc
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import (
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	"net/http"
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	"github.com/cubefs/cubefs/blobstore/common/crc32block"
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)
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type crcDecoder struct{}
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var _ ProgressHandler = (*crcDecoder)(nil)
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func (*crcDecoder) Handler(w http.ResponseWriter, req *http.Request, f func(http.ResponseWriter, *http.Request)) {
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	if req.Header.Get(HeaderCrcEncoded) != "" && w.Header().Get(HeaderAckCrcEncoded) == "" {
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		if size := req.ContentLength; size > 0 && req.Body != nil {
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			decoder := crc32block.NewBodyDecoder(req.Body)
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			req.ContentLength = decoder.CodeSize(size)
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			req.Body = decoder
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		}
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		w.Header().Set(HeaderAckCrcEncoded, "1")
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	}
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	f(w, req)
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}
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