func aboutPage(w http.ResponseWriter, r *http.Request) {
c := appengine.NewContext(r)
fmt.Fprintf(w, "<h1>%v</h1>", appengine.DefaultVersionHostname(c))
token, expire, _ := appengine.AccessToken(c, "test")
fmt.Fprintf(w, "<p>AccessToken: %v %v", token, expire)
fmt.Fprintf(w, "<p>AppID: %v", appengine.AppID(c))
fmt.Fprintf(w, "<p>FQAppID: %v", c.FullyQualifiedAppID())
fmt.Fprintf(w, "<p>Go version: %v", runtime.Version())
fmt.Fprintf(w, "<p>Datacenter: %v", appengine.Datacenter())
fmt.Fprintf(w, "<p>InstanceID: %v", appengine.InstanceID())
fmt.Fprintf(w, "<p>IsDevAppServer: %v", appengine.IsDevAppServer())
fmt.Fprintf(w, "<p>RequestID: %v", appengine.RequestID(c))
fmt.Fprintf(w, "<p>ServerSoftware: %v", appengine.ServerSoftware())
sa, _ := appengine.ServiceAccount(c)
fmt.Fprintf(w, "<p>ServiceAccount: %v", sa)
keyname, signed, _ := appengine.SignBytes(c, []byte("test"))
fmt.Fprintf(w, "<p>SignBytes: %v %v", keyname, signed)
fmt.Fprintf(w, "<p>VersionID: %v", appengine.VersionID(c))
fmt.Fprintf(w, "<p>Request: %v", r)
r2 := c.Request()
fmt.Fprintf(w, "<p>Context Request type/value: %T %v", r2, r2)
}
// Implements the Sign method from SigningMethod
// For this signing method, a valid appengine.Context must be
// passed as the key.
func (s *SigningMethodAppEngine) Sign(signingString string, key interface{}) (string, error) {
var ctx appengine.Context
switch k := key.(type) {
case appengine.Context:
ctx = k
default:
return "", ErrInvalidKey
}
_, signature, err := appengine.SignBytes(ctx, []byte(signingString))
if err != nil {
return "", err
}
return EncodeSegment(signature), nil
}
