Golang STD HTTP to gin middleware adapter

adapter.go

// Copyright 2020 Petrukhin Pavel
//
// 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 asgin

import (
	"net/http"

	"github.com/gin-gonic/gin"
)

// AsGin converts middleware to the gin middleware handler.
func AsGin(middleware func(next http.Handler) http.Handler) gin.HandlerFunc {
	return func(gctx *gin.Context) {
		var skip = true
		var handler http.HandlerFunc = func(http.ResponseWriter, *http.Request) {
			skip = false
		}
		middleware(handler).ServeHTTP(gctx.Writer, gctx.Request)
		switch {
		case skip:
			gctx.Abort()
		default:
			gctx.Next()
		}
	}
}