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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
// +build autocert
// This file contains autocert and cloud.google.com/go/storage
// dependencies we want to hide by default from the Go build system,
// which currently doesn't know how to fetch non-golang.org/x/*
// dependencies. The Dockerfile builds the production binary
// with this code using --tags=autocert.
package main
import (
"context"
"crypto/tls"
"log"
"net/http"
"strings"
"cloud.google.com/go/storage"
"golang.org/x/build/autocertcache"
"golang.org/x/crypto/acme/autocert"
)
func init() {
runHTTPS = runHTTPSAutocert
certInit = certInitAutocert
wrapHTTPMux = wrapHTTPMuxAutocert
}
var autocertManager *autocert.Manager
func certInitAutocert() {
var cache autocert.Cache
if b := *autoCertCacheBucket; b != "" {
sc, err := storage.NewClient(context.Background())
if err != nil {
log.Fatalf("storage.NewClient: %v", err)
}
cache = autocertcache.NewGoogleCloudStorageCache(sc, b)
}
autocertManager = &autocert.Manager{
Prompt: autocert.AcceptTOS,
HostPolicy: autocert.HostWhitelist(strings.Split(*autoCertDomain, ",")...),
Cache: cache,
}
}
func runHTTPSAutocert(h http.Handler) error {
s := &http.Server{
Addr: ":https",
Handler: h,
TLSConfig: &tls.Config{
GetCertificate: autocertManager.GetCertificate,
},
}
return s.ListenAndServeTLS("", "")
}
func wrapHTTPMuxAutocert(h http.Handler) http.Handler {
return autocertManager.HTTPHandler(h)
}
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