🔥 feat: Add support for context.Context in keyauth middleware (#3287)

* feat(middleware): add support to context.Context in keyauth middleware

pretty straightforward option to use context.Context instead of just
fiber.Ctx, tests added accordingly.

* fix(middleware): include import that was missing from previous commit

* fix(middleware): include missing import

* Replace logger with panic

* Update keyauth_test.go

* Update keyauth_test.go

---------

Co-authored-by: Juan Calderon-Perez <835733+gaby@users.noreply.github.com>

middleware/keyauth/keyauth.go

@@ -2,6 +2,7 @@
 package keyauth
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"net/url"
@@ -59,7 +60,10 @@ func New(config ...Config) fiber.Handler {
 		valid, err := cfg.Validator(c, key)
 
 		if err == nil && valid {
+			// Store in both Locals and Context
 			c.Locals(tokenKey, key)
+			ctx := context.WithValue(c.Context(), tokenKey, key)
+			c.SetContext(ctx)
 			return cfg.SuccessHandler(c)
 		}
 		return cfg.ErrorHandler(c, err)
@@ -68,12 +72,20 @@ func New(config ...Config) fiber.Handler {
 
 // TokenFromContext returns the bearer token from the request context.
 // returns an empty string if the token does not exist
-func TokenFromContext(c fiber.Ctx) string {
-	token, ok := c.Locals(tokenKey).(string)
-	if !ok {
-		return ""
+func TokenFromContext(c any) string {
+	switch ctx := c.(type) {
+	case context.Context:
+		if token, ok := ctx.Value(tokenKey).(string); ok {
+			return token
+		}
+	case fiber.Ctx:
+		if token, ok := ctx.Locals(tokenKey).(string); ok {
+			return token
+		}
+	default:
+		panic("unsupported context type, expected fiber.Ctx or context.Context")
 	}
-	return token
+	return ""
 }
 
 // MultipleKeySourceLookup creates a CustomKeyLookup function that checks multiple sources until one is found

middleware/keyauth/keyauth_test.go

@@ -503,33 +503,67 @@ func Test_TokenFromContext_None(t *testing.T) {
 }
 
 func Test_TokenFromContext(t *testing.T) {
-	app := fiber.New()
-	// Wire up keyauth middleware to set TokenFromContext now
-	app.Use(New(Config{
-		KeyLookup:  "header:Authorization",
-		AuthScheme: "Basic",
-		Validator: func(_ fiber.Ctx, key string) (bool, error) {
-			if key == CorrectKey {
-				return true, nil
-			}
-			return false, ErrMissingOrMalformedAPIKey
-		},
-	}))
-	// Define a test handler that checks TokenFromContext
-	app.Get("/", func(c fiber.Ctx) error {
-		return c.SendString(TokenFromContext(c))
+	// Test that TokenFromContext returns the correct token
+	t.Run("fiber.Ctx", func(t *testing.T) {
+		app := fiber.New()
+		app.Use(New(Config{
+			KeyLookup:  "header:Authorization",
+			AuthScheme: "Basic",
+			Validator: func(_ fiber.Ctx, key string) (bool, error) {
+				if key == CorrectKey {
+					return true, nil
+				}
+				return false, ErrMissingOrMalformedAPIKey
+			},
+		}))
+		app.Get("/", func(c fiber.Ctx) error {
+			return c.SendString(TokenFromContext(c))
+		})
+
+		req := httptest.NewRequest(fiber.MethodGet, "/", nil)
+		req.Header.Add("Authorization", "Basic "+CorrectKey)
+		res, err := app.Test(req)
+		require.NoError(t, err)
+
+		body, err := io.ReadAll(res.Body)
+		require.NoError(t, err)
+		require.Equal(t, CorrectKey, string(body))
 	})
 
-	req := httptest.NewRequest(fiber.MethodGet, "/", nil)
-	req.Header.Add("Authorization", "Basic "+CorrectKey)
-	// Send
-	res, err := app.Test(req)
-	require.NoError(t, err)
+	t.Run("context.Context", func(t *testing.T) {
+		app := fiber.New()
+		app.Use(New(Config{
+			KeyLookup:  "header:Authorization",
+			AuthScheme: "Basic",
+			Validator: func(_ fiber.Ctx, key string) (bool, error) {
+				if key == CorrectKey {
+					return true, nil
+				}
+				return false, ErrMissingOrMalformedAPIKey
+			},
+		}))
+		// Verify that TokenFromContext works with context.Context
+		app.Get("/", func(c fiber.Ctx) error {
+			ctx := c.Context()
+			token := TokenFromContext(ctx)
+			return c.SendString(token)
+		})
 
-	// Read the response body into a string
-	body, err := io.ReadAll(res.Body)
-	require.NoError(t, err)
-	require.Equal(t, CorrectKey, string(body))
+		req := httptest.NewRequest(fiber.MethodGet, "/", nil)
+		req.Header.Add("Authorization", "Basic "+CorrectKey)
+		res, err := app.Test(req)
+		require.NoError(t, err)
+
+		body, err := io.ReadAll(res.Body)
+		require.NoError(t, err)
+		require.Equal(t, CorrectKey, string(body))
+	})
+
+	t.Run("invalid context type", func(t *testing.T) {
+		require.Panics(t, func() {
+			_ = TokenFromContext("invalid")
+		})
+	})
 }
 
 func Test_AuthSchemeToken(t *testing.T) {