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version.go
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version.go
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// Copyright (C) 2014-2018 Wutong Co., Ltd.
// WUTONG, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Wutong,
// one or multiple Commercial Licenses authorized by Wutong Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package middleware
import (
"context"
"net/http"
ctxutil "github.com/wutong-paas/wutong/api/util/ctx"
)
//APIVersion api版本
func APIVersion(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
apiVersion := r.Header.Get("API_VERSION")
if apiVersion == "" {
apiVersion = "default"
}
ctx := context.WithValue(r.Context(), ctxutil.ContextKey("api_version"), apiVersion)
next.ServeHTTP(w, r.WithContext(ctx))
}
return http.HandlerFunc(fn)
}