refactor: PSG-5091 Remove JWK re-fetch logic

app.go

@@ -15,11 +15,10 @@ type Config struct {
 }
 
 type App struct {
-	ID        string
-	JWKS      jwk.Set
-	Config    *Config
-	client    *ClientWithResponses
-	jwksCache *jwk.Cache
+	ID           string
+	Config       *Config
+	client       *ClientWithResponses
+	jwksCacheSet jwk.Set
 }
 
 func New(appID string, config *Config) (*App, error) {
@@ -42,14 +41,13 @@ func New(appID string, config *Config) (*App, error) {
 		client: client,
 	}
 
-	app.jwksCache = jwk.NewCache(context.Background())
-	if err := app.jwksCache.Register(fmt.Sprintf(jwksUrl, appID)); err != nil {
+	cache := jwk.NewCache(context.Background())
+	if err := cache.Register(fmt.Sprintf(jwksUrl, appID)); err != nil {
 		return nil, err
 	}
 
-	if err := app.refreshJWKSCache(); err != nil {
-		return nil, err
-	}
+	app.jwksCacheSet = jwk.NewCachedSet(cache, fmt.Sprintf(jwksUrl, appID))
+	var _ jwk.Set = app.jwksCacheSet
 
 	return &app, nil
 }

app_test.go

@@ -40,14 +40,6 @@ func TestGetApp(t *testing.T) {
 
 }
 
-func TestAppNewJWKSCache(t *testing.T) {
-	psg, err := passage.New(PassageAppID, &passage.Config{
-		APIKey: PassageApiKey, // An API_KEY environment variable is required for testing.
-	})
-	require.Nil(t, err)
-	assert.NotNil(t, psg.JWKS)
-}
-
 // should be run with the -race flag, i.e. `go test -race -run TestAppJWKSCacheWriteConcurrency`
 func TestAppJWKSCacheWriteConcurrency(t *testing.T) {
 	goRoutineCount := 2

authentication.go

@@ -1,7 +1,6 @@
 package passage
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"strings"
@@ -41,17 +40,9 @@ func (a *App) getPublicKey(token *jwt.Token) (interface{}, error) {
 		return nil, Error{Message: "expecting JWT header to have string kid"}
 	}
 
-	key, ok := a.JWKS.LookupKeyID(keyID)
-	// if key doesn't exist, re-fetch one more time to see if this jwk was just added
+	key, ok := a.jwksCacheSet.LookupKeyID(keyID)
 	if !ok {
-		if err := a.refreshJWKSCache(); err != nil {
-			return nil, err
-		}
-
-		key, ok = a.JWKS.LookupKeyID(keyID)
-		if !ok {
-			return nil, Error{Message: fmt.Sprintf("unable to find key %q", keyID)}
-		}
+		return nil, Error{Message: fmt.Sprintf("unable to find key %q", keyID)}
 	}
 
 	var pubKey interface{}
@@ -60,15 +51,6 @@ func (a *App) getPublicKey(token *jwt.Token) (interface{}, error) {
 	return pubKey, err
 }
 
-func (a *App) refreshJWKSCache() error {
-	var err error
-	if a.JWKS, err = a.jwksCache.Refresh(context.Background(), fmt.Sprintf(jwksUrl, a.ID)); err != nil {
-		return Error{Message: "failed to fetch jwks"}
-	}
-
-	return nil
-}
-
 // AuthenticateRequestWithCookie fetches a cookie from the request and uses it to authenticate
 // returns the userID (string) on success, error on failure
 func (a *App) AuthenticateRequestWithCookie(r *http.Request) (string, error) {