registry/registry/handlers/helpers.go
Stephen J Day 0f08b6961a Move registry package into handler package
The goal is to free up the distribution/registry package to include common
registry types. This moves the webapp definitions out of the way to allow for
this change in the future.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-02-10 17:25:40 -08:00

32 lines
807 B
Go

package handlers
import (
"encoding/json"
"io"
"net/http"
)
// serveJSON marshals v and sets the content-type header to
// 'application/json'. If a different status code is required, call
// ResponseWriter.WriteHeader before this function.
func serveJSON(w http.ResponseWriter, v interface{}) error {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
enc := json.NewEncoder(w)
if err := enc.Encode(v); err != nil {
return err
}
return nil
}
// closeResources closes all the provided resources after running the target
// handler.
func closeResources(handler http.Handler, closers ...io.Closer) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
for _, closer := range closers {
defer closer.Close()
}
handler.ServeHTTP(w, r)
})
}