/
http.go
43 lines (39 loc) · 1.09 KB
/
http.go
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// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
package shutdown
import (
"net/http"
)
// WrapHandler will return an http Handler
// That will lock shutdown until all have completed
// and will return http.StatusServiceUnavailable if
// shutdown has been initiated.
func WrapHandler(h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
l := Lock()
if l == nil {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
// We defer, so panics will not keep a lock
defer l()
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
// WrapHandlerFunc will return an http.HandlerFunc
// that will lock shutdown until all have completed.
// The handler will return http.StatusServiceUnavailable if
// shutdown has been initiated.
func WrapHandlerFunc(h http.HandlerFunc) http.HandlerFunc {
fn := func(w http.ResponseWriter, r *http.Request) {
l := Lock()
if l == nil {
w.WriteHeader(http.StatusServiceUnavailable)
return
}
// We defer, so panics will not keep a lock
defer l()
h(w, r)
}
return http.HandlerFunc(fn)
}