mirror of
https://github.com/caddyserver/caddy.git
synced 2024-11-25 17:56:34 +08:00
73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
// Copyright 2015 Light Code Labs, LLC
|
|
//
|
|
// 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.
|
|
|
|
package caddytls
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"fmt"
|
|
"log"
|
|
"net/http"
|
|
"net/http/httputil"
|
|
"net/url"
|
|
"strings"
|
|
)
|
|
|
|
const challengeBasePath = "/.well-known/acme-challenge"
|
|
|
|
// HTTPChallengeHandler proxies challenge requests to ACME client if the
|
|
// request path starts with challengeBasePath, if the HTTP challenge is not
|
|
// disabled, and if we are known to be obtaining a certificate for the name.
|
|
// It returns true if it handled the request and no more needs to be done;
|
|
// it returns false if this call was a no-op and the request still needs handling.
|
|
func HTTPChallengeHandler(w http.ResponseWriter, r *http.Request, listenHost string) bool {
|
|
if !strings.HasPrefix(r.URL.Path, challengeBasePath) {
|
|
return false
|
|
}
|
|
if DisableHTTPChallenge {
|
|
return false
|
|
}
|
|
if !namesObtaining.Has(r.Host) {
|
|
return false
|
|
}
|
|
|
|
scheme := "http"
|
|
if r.TLS != nil {
|
|
scheme = "https"
|
|
}
|
|
|
|
if listenHost == "" {
|
|
listenHost = "localhost"
|
|
}
|
|
|
|
// always proxy to the DefaultHTTPAlternatePort because obviously the
|
|
// ACME challenge request already got into one of our HTTP handlers, so
|
|
// it means we must have started a HTTP listener on the alternate
|
|
// port instead; which is only accessible via listenHost
|
|
upstream, err := url.Parse(fmt.Sprintf("%s://%s:%s", scheme, listenHost, DefaultHTTPAlternatePort))
|
|
if err != nil {
|
|
w.WriteHeader(http.StatusInternalServerError)
|
|
log.Printf("[ERROR] ACME proxy handler: %v", err)
|
|
return true
|
|
}
|
|
|
|
proxy := httputil.NewSingleHostReverseProxy(upstream)
|
|
proxy.Transport = &http.Transport{
|
|
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
|
|
}
|
|
proxy.ServeHTTP(w, r)
|
|
|
|
return true
|
|
}
|