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package examples_test
import (
"encoding/json"
"fmt"
"time"
"github.com/lestrrat-go/jwx/v2/jwt"
)
func Example_jwt_get_claims() {
tok, err := jwt.NewBuilder().
IssuedAt(time.Now()).
Issuer(`github.com/lestrrat-go/jwx`).
Subject(`example`).
Claim(`claim1`, `value1`).
Claim(`claim2`, `2022-05-16T07:35:56+00:00`).
Build()
if err != nil {
fmt.Printf("failed to build token: %s\n", err)
return
}
// Pre-defined fields have typed accessors.
var _ time.Time = tok.IssuedAt()
var _ string = tok.Issuer()
var _ string = tok.Subject()
var v interface{}
var ok bool
// But you can also get them via the generic `.Get()` method.
// However, v is of type interface{}, so you might need to
// use a type switch to properly use its value.
//
// For the key name you could also use jwt.IssuedAtKey constant
v, ok = tok.Get(`iat`)
// Private claims
v, ok = tok.Get(`claim1`)
v, ok = tok.Get(`claim2`)
// However, it is possible to globally specify that a private
// claim should be parsed into a custom type.
// In the sample below `claim2` is to be an instance of time.Time
jwt.RegisterCustomField(`claim2`, time.Time{})
tok = jwt.New()
if err := json.Unmarshal([]byte(`{"claim2":"2022-05-16T07:35:56+00:00"}`), tok); err != nil {
fmt.Printf(`failed to parse token: %s`, err)
return
}
v, ok = tok.Get(`claim2`)
if !ok {
fmt.Printf(`failed to get private claim "claim2"`)
return
}
if _, ok := v.(time.Time); !ok {
fmt.Printf(`claim2 expected to be time.Time, but got %T`, v)
return
}
_ = v
_ = ok
// OUTPUT:
}
|
