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Also match weakly validated ETags (#28957)

Browse Source 
https://stackoverflow.com/questions/51973120/where-does-the-w-in-an-etag-appear-from

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag#

---------

Co-authored-by: delvh <dev.lh@web.de>
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cchangwen 2024-01-30 00:18:40 +08:00 committed by GitHub
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commit 28fe3db1fb
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modules/httpcache/httpcache.go
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@ -59,7 +59,7 @@ func checkIfNoneMatchIsValid(req *http.Request, etag string) bool {
ifNoneMatch := req.Header.Get("If-None-Match")
if len(ifNoneMatch) > 0 {
for _, item := range strings.Split(ifNoneMatch, ",") {
item = strings.TrimSpace(item)
item = strings.TrimPrefix(strings.TrimSpace(item), "W/") // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag#directives
if item == etag {
return true
}