/
compress.go
53 lines (46 loc) · 1.31 KB
/
compress.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: MIT
package handlers
import (
"bytes"
"compress/gzip"
"fmt"
"io"
"io/ioutil"
"sync"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/go-logr/logr"
)
var gzipPool = sync.Pool{
New: func() interface{} {
return gzip.NewWriter(ioutil.Discard)
},
}
func NewRequestCompressionHandler(logger logr.Logger) request.NamedHandler {
return request.NamedHandler{
Name: "RequestCompressionHandler",
Fn: func(req *request.Request) {
buf := new(bytes.Buffer)
g := gzipPool.Get().(*gzip.Writer)
g.Reset(buf)
size, err := io.Copy(g, req.GetBody())
if err != nil {
logger.Error(err,"I! Error occurred when trying to compress payload for operation %v, uncompressed request is sent")
req.ResetBody()
return
}
g.Close()
compressedSize := int64(buf.Len())
if size <= compressedSize {
logger.Info("D! The payload is not compressed. original payload size: %v, compressed payload size: %v.", size, compressedSize)
req.ResetBody()
return
}
req.SetBufferBody(buf.Bytes())
gzipPool.Put(g)
req.HTTPRequest.ContentLength = compressedSize
req.HTTPRequest.Header.Set("Content-Length", fmt.Sprintf("%d", compressedSize))
req.HTTPRequest.Header.Set("Content-Encoding", "gzip")
},
}
}