appengine-value is a simple utility library to handle simple secret configuration values in an App Engine app.

Problem

Your app requires secret values (OAuth secrets, API keys, passwords) and you rightly don't want to specify these values as consts in your source code.

Don't do this!

const (
	clientID     = "123456.clientaccount.foo"
	clientSecret = "s8p3rs3cr1t"
)

Solution

Do this instead

import value "github.com/ImJasonH/appengine-value"

func doOAuth(c appengine.Context) {
	clientID := value.Get(c, "client_id")
	clientSecret := value.Get(c, "client_secret")
	// use clientID and clientSecret
}

If you have multiple values, you can batch lookups:

func doOAuth(c appengine.Context) {
	vals := value.GetMulti(c, "client_id", "client_secret")
	// use vals["clientID"] and vals["clientSecret"]
}

Or define values like flags

var (
	clientID     = value.String("client_id")
	clientSecret = value.String("client_secret")
)

func doOAuth(c appengine.Context) {
	value.Init(c)
	// use *clientID and *clientSecret
}

Configuration

To set or unset values, use the admin UI which is served at /_ah/value/admin -- be sure to map this in your app.yaml:

handlers:
- url: /_ah/value/.*
  script: _go_app
  login: admin

(You can always remove the URL mapping if you're done setting values)