Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
Mirrored from https://github.com/Slazee/caddy.git
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| 1 | // Copyright 2015 Matthew Holt and The Caddy Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | // Most of the code in this file was initially borrowed from the Go |
| 16 | // standard library and modified; It had this copyright notice: |
| 17 | // Copyright 2021 The Go Authors. All rights reserved. |
| 18 | // Use of this source code is governed by a BSD-style |
| 19 | // license that can be found in the LICENSE file. |
| 20 | |
| 21 | // Original source, copied because the package was marked internal: |
| 22 | // https://github.com/golang/go/blob/5c489514bc5e61ad9b5b07bd7d8ec65d66a0512a/src/net/http/internal/ascii/print.go |
| 23 | |
| 24 | package reverseproxy |
| 25 | |
| 26 | // asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t |
| 27 | // are equal, ASCII-case-insensitively. |
| 28 | func asciiEqualFold(s, t string) bool { |
| 29 | if len(s) != len(t) { |
| 30 | return false |
| 31 | } |
| 32 | for i := 0; i < len(s); i++ { |
| 33 | if asciiLower(s[i]) != asciiLower(t[i]) { |
| 34 | return false |
| 35 | } |
| 36 | } |
| 37 | return true |
| 38 | } |
| 39 | |
| 40 | // asciiLower returns the ASCII lowercase version of b. |
| 41 | func asciiLower(b byte) byte { |
| 42 | if 'A' <= b && b <= 'Z' { |
| 43 | return b + ('a' - 'A') |
| 44 | } |
| 45 | return b |
| 46 | } |
| 47 | |
| 48 | // asciiIsPrint returns whether s is ASCII and printable according to |
| 49 | // https://tools.ietf.org/html/rfc20#section-4.2. |
| 50 | func asciiIsPrint(s string) bool { |
| 51 | for i := 0; i < len(s); i++ { |
| 52 | if s[i] < ' ' || s[i] > '~' { |
| 53 | return false |
| 54 | } |
| 55 | } |
| 56 | return true |
| 57 | } |