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cors.go
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cors.go
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/*
* Copyright 2019 InfAI (CC SES)
*
* 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 util
import "net/http"
func NewCors(handler http.Handler) http.Handler {
return &CorsMiddleware{handler: handler}
}
type CorsMiddleware struct {
handler http.Handler
}
func (this *CorsMiddleware) ServeHTTP(res http.ResponseWriter, req *http.Request) {
origin := req.Header.Get("Origin")
if origin == "" {
origin = "*"
}
res.Header().Set("Access-Control-Allow-Origin", origin)
res.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, authorization, Authorization")
res.Header().Set("Access-Control-Allow-Credentials", "true")
res.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
if req.Method == "OPTIONS" {
res.WriteHeader(http.StatusOK)
} else {
this.handler.ServeHTTP(res, req)
}
}