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79 lines
1.4 KiB
Go
79 lines
1.4 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package http2
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import (
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"net/http"
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"strings"
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)
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var (
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commonLowerHeader = map[string]string{} // Go-Canonical-Case -> lower-case
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commonCanonHeader = map[string]string{} // lower-case -> Go-Canonical-Case
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)
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func init() {
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for _, v := range []string{
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"accept",
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"accept-charset",
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"accept-encoding",
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"accept-language",
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"accept-ranges",
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"age",
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"access-control-allow-origin",
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"allow",
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"authorization",
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"cache-control",
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"content-disposition",
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"content-encoding",
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"content-language",
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"content-length",
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"content-location",
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"content-range",
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"content-type",
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"cookie",
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"date",
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"etag",
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"expect",
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"expires",
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"from",
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"host",
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"if-match",
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"if-modified-since",
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"if-none-match",
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"if-unmodified-since",
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"last-modified",
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"link",
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"location",
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"max-forwards",
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"proxy-authenticate",
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"proxy-authorization",
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"range",
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"referer",
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"refresh",
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"retry-after",
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"server",
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"set-cookie",
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"strict-transport-security",
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"trailer",
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"transfer-encoding",
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"user-agent",
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"vary",
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"via",
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"www-authenticate",
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} {
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chk := http.CanonicalHeaderKey(v)
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commonLowerHeader[chk] = v
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commonCanonHeader[v] = chk
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}
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}
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func lowerHeader(v string) string {
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if s, ok := commonLowerHeader[v]; ok {
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return s
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}
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return strings.ToLower(v)
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}
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