mirror of https://github.com/prometheus/prometheus
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
// Copyright 2013 The Prometheus 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.
|
|
|
|
package httputil
|
|
|
|
import (
|
|
"net/http"
|
|
"regexp"
|
|
)
|
|
|
|
var corsHeaders = map[string]string{
|
|
"Access-Control-Allow-Headers": "Accept, Authorization, Content-Type, Origin",
|
|
"Access-Control-Allow-Methods": "GET, POST, OPTIONS",
|
|
"Access-Control-Expose-Headers": "Date",
|
|
"Vary": "Origin",
|
|
}
|
|
|
|
// SetCORS enables cross-site script calls.
|
|
func SetCORS(w http.ResponseWriter, o *regexp.Regexp, r *http.Request) {
|
|
origin := r.Header.Get("Origin")
|
|
if origin == "" {
|
|
return
|
|
}
|
|
|
|
for k, v := range corsHeaders {
|
|
w.Header().Set(k, v)
|
|
}
|
|
|
|
if o.String() == "^(?:.*)$" {
|
|
w.Header().Set("Access-Control-Allow-Origin", "*")
|
|
return
|
|
}
|
|
|
|
if o.MatchString(origin) {
|
|
w.Header().Set("Access-Control-Allow-Origin", origin)
|
|
}
|
|
}
|