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Allow compression at the transport level. (#595)

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* Allow compression at the transport level.

* Do not enable compression but do decompress compressed content-encodings.

* Fix import in download.go to use std compress/go.

* Fix issue with err shadowing.

* Don't overwrite resBody on download of original image.

Set content length to 0 if data was compressed.
This commit is contained in:
Ewan Higgs 2021-03-25 11:43:30 +01:00 committed by GitHub
parent 83c4ef1ea8
commit c7fcb9b94f
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1 changed files with 17 additions and 1 deletions
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18
download.go
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@ -1,6 +1,7 @@
package main
import (
"compress/gzip"
"context"
"crypto/tls"
"fmt"
@ -200,7 +201,22 @@ func downloadImage(ctx context.Context) (context.Context, context.CancelFunc, er
return ctx, func() {}, err
}
imgdata, err := readAndCheckImage(res.Body, int(res.ContentLength))
body := res.Body
contentLength := int(res.ContentLength)
if res.Header.Get("Content-Encoding") == "gzip" {
gzipBody, errGzip := gzip.NewReader(res.Body)
if gzipBody != nil {
defer gzipBody.Close()
}
if errGzip != nil {
return ctx, func() {}, err
}
body = gzipBody
contentLength = 0
}
imgdata, err := readAndCheckImage(body, contentLength)
if err != nil {
return ctx, func() {}, err
}