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48 lines
1.3 KiB
48 lines
1.3 KiB
// Copyright 2013 The Prometheus Authors |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package httputil |
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import ( |
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"net/http" |
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"github.com/grafana/regexp" |
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) |
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var corsHeaders = map[string]string{ |
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"Access-Control-Allow-Headers": "Accept, Authorization, Content-Type, Origin", |
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"Access-Control-Allow-Methods": "GET, POST, OPTIONS", |
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"Access-Control-Expose-Headers": "Date", |
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"Vary": "Origin", |
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} |
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// SetCORS enables cross-site script calls. |
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func SetCORS(w http.ResponseWriter, o *regexp.Regexp, r *http.Request) { |
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origin := r.Header.Get("Origin") |
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if origin == "" { |
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return |
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} |
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for k, v := range corsHeaders { |
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w.Header().Set(k, v) |
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} |
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if o.String() == "^(?:.*)$" { |
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w.Header().Set("Access-Control-Allow-Origin", "*") |
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return |
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} |
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if o.MatchString(origin) { |
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w.Header().Set("Access-Control-Allow-Origin", origin) |
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} |
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}
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