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security.go
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security.go
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package handlers
// handlers
// Copyright (C) 2018 Maximilian Pachl
// MIT License
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// ---------------------------------------------------------------------------------------
// imports
// ---------------------------------------------------------------------------------------
import (
"net/http"
"github.com/faryon93/handlers/opt"
)
// ---------------------------------------------------------------------------------------
// public functions
// ---------------------------------------------------------------------------------------
// Keyed restricts the execution of fn() to requests which
// have the query parameter "key" matched with the user supplied key.
func Keyed(key string, opts ...interface{}) Adapter {
httpError := opt.GetErrorHandler(opts)
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
requestKey := r.URL.Query().Get("key")
if key != "" && requestKey != key {
httpError(w, "forbidden", http.StatusForbidden)
return
}
h.ServeHTTP(w, r)
})
}
}
// Enabled denys access to fn() if enabled is false.
func Enabled(enabled bool, opts ...interface{}) Adapter {
httpError := opt.GetErrorHandler(opts)
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if !enabled {
httpError(w, "endpoint not enabled", http.StatusNotFound)
return
}
h.ServeHTTP(w, r)
})
}
}