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* reverseproxy: Sync up `handleUpgradeResponse` with stdlib I had left this as a TODO for when we bump to minimum 1.17, but I should've realized it was under `internal` so it couldn't be used directly. Copied the functions we needed for parity. Hopefully this is ok! * Add tests and fix godoc comments Co-authored-by: Matthew Holt <mholt@users.noreply.github.com>
58 lines
1.8 KiB
Go
58 lines
1.8 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy 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 implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Most of the code in this file was initially borrowed from the Go
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// standard library and modified; It had this copyright notice:
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// Copyright 2021 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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// Original source, copied because the package was marked internal:
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// https://github.com/golang/go/blob/5c489514bc5e61ad9b5b07bd7d8ec65d66a0512a/src/net/http/internal/ascii/print.go
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package reverseproxy
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// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t
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// are equal, ASCII-case-insensitively.
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func asciiEqualFold(s, t string) bool {
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if len(s) != len(t) {
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return false
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}
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for i := 0; i < len(s); i++ {
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if asciiLower(s[i]) != asciiLower(t[i]) {
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return false
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}
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}
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return true
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}
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// asciiLower returns the ASCII lowercase version of b.
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func asciiLower(b byte) byte {
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if 'A' <= b && b <= 'Z' {
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return b + ('a' - 'A')
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}
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return b
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}
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// asciiIsPrint returns whether s is ASCII and printable according to
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// https://tools.ietf.org/html/rfc20#section-4.2.
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func asciiIsPrint(s string) bool {
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for i := 0; i < len(s); i++ {
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if s[i] < ' ' || s[i] > '~' {
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return false
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}
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}
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return true
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}
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