File: envinit.go

package info (click to toggle)
golang-github-zenazn-goji 1.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, forky, sid, trixie
  • size: 464 kB
  • sloc: makefile: 3
file content (27 lines) | stat: -rw-r--r-- 659 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
package middleware

import (
	"net/http"

	"github.com/zenazn/goji/web"
)

type envInit struct {
	c *web.C
	h http.Handler
}

func (e envInit) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	if e.c.Env == nil {
		e.c.Env = make(map[interface{}]interface{})
	}
	e.h.ServeHTTP(w, r)
}

// EnvInit is a middleware that allocates an environment map if it is nil. While
// it's impossible in general to ensure that Env is never nil in a middleware
// stack, in most common cases placing this middleware at the top of the stack
// will eliminate the need for repetative nil checks.
func EnvInit(c *web.C, h http.Handler) http.Handler {
	return envInit{c, h}
}