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xxss.go
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xxss.go
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// Copyright 2017 Corey Scott http://www.sage42.org/
//
// 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 middleware
import (
"net/http"
)
const (
xxssHeader = "X-XSS-Protection"
xxssValue = "1"
xxssBlock = "; mode=block"
)
// XXSS sends X-XSS-Protection response header
//
// By default the "mode=block" is not sent.
//
// Reference: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection
func XXSS(handler http.Handler, block ...bool) http.HandlerFunc {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
value := xxssValue
if len(block) > 0 && block[0] {
value += xxssBlock
}
resp.Header().Set(xxssHeader, value)
handler.ServeHTTP(resp, req)
})
}