frp/pkg/util/http/http.go

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// Copyright 2023 The frp Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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package http
import (
"encoding/base64"
"net"
"net/http"
"strings"
)
func OkResponse() *http.Response {
header := make(http.Header)
res := &http.Response{
Status: "OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: header,
}
return res
}
func ProxyUnauthorizedResponse() *http.Response {
header := make(http.Header)
header.Set("Proxy-Authenticate", `Basic realm="Restricted"`)
res := &http.Response{
Status: "Proxy Authentication Required",
StatusCode: 407,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: header,
}
return res
}
// canonicalHost strips port from host if present and returns the canonicalized
// host name.
func CanonicalHost(host string) (string, error) {
var err error
host = strings.ToLower(host)
if hasPort(host) {
host, _, err = net.SplitHostPort(host)
if err != nil {
return "", err
}
}
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// Strip trailing dot from fully qualified domain names.
host = strings.TrimSuffix(host, ".")
return host, nil
}
// hasPort reports whether host contains a port number. host may be a host
// name, an IPv4 or an IPv6 address.
func hasPort(host string) bool {
colons := strings.Count(host, ":")
if colons == 0 {
return false
}
if colons == 1 {
return true
}
return host[0] == '[' && strings.Contains(host, "]:")
}
func ParseBasicAuth(auth string) (username, password string, ok bool) {
const prefix = "Basic "
// Case insensitive prefix match. See Issue 22736.
if len(auth) < len(prefix) || !strings.EqualFold(auth[:len(prefix)], prefix) {
return
}
c, err := base64.StdEncoding.DecodeString(auth[len(prefix):])
if err != nil {
return
}
cs := string(c)
s := strings.IndexByte(cs, ':')
if s < 0 {
return
}
return cs[:s], cs[s+1:], true
}
func BasicAuth(username, passwd string) string {
auth := username + ":" + passwd
return "Basic " + base64.StdEncoding.EncodeToString([]byte(auth))
}