more features and fix database/mysql:jwt example

_examples/database/mysql/README.md

@@ -89,7 +89,7 @@ MYSQL_HOST=localhost
 MYSQL_DATABASE=myapp
 ```
 
-Download the schema from [migration/myapp.sql](migration/myapp.sql) and execute it against your MySQL server instance.
+Download the schema from [migration/db.sql](migration/db.sql) and execute it against your MySQL server instance.
 
 ```sql
 CREATE DATABASE IF NOT EXISTS myapp DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
@@ -139,7 +139,7 @@ Testing is important. The code is written in a way that testing should be trivia
 
 ## Packages
 
-- https://github.com/dgrijalva/jwt-go (JWT parsing)
+- https://github.com/kataras/jwt (JWT parsing)
 - https://github.com/go-sql-driver/mysql (Go Driver for MySQL)
 - https://github.com/DATA-DOG/go-sqlmock (Testing DB see [service/category_service_test.go](service/category_service_test.go))
 - https://github.com/kataras/iris (HTTP)

_examples/database/mysql/api/api.go

@@ -15,18 +15,19 @@ import (
 // Router accepts any required dependencies and returns the main server's handler.
 func Router(db sql.Database, secret string) func(iris.Party) {
 	return func(r iris.Party) {
-		j := jwt.HMAC(15*time.Minute, secret)
-
 		r.Use(requestid.New())
-		r.Use(verifyToken(j))
+
+		signer := jwt.NewSigner(jwt.HS256, secret, 15*time.Minute)
+		r.Get("/token", writeToken(signer))
+
+		verify := jwt.NewVerifier(jwt.HS256, secret).Verify(nil)
+		r.Use(verify)
 		// Generate a token for testing by navigating to
 		// http://localhost:8080/token endpoint.
 		// Copy-paste it to a ?token=$token url parameter or
 		// open postman and put an Authentication: Bearer $token to get
 		// access on create, update and delete endpoinds.
 
-		r.Get("/token", writeToken(j))
-
 		var (
 			categoryService = service.NewCategoryService(db)
 			productService  = service.NewProductService(db)
@@ -73,25 +74,19 @@ func Router(db sql.Database, secret string) func(iris.Party) {
 	}
 }
 
-func writeToken(j *jwt.JWT) iris.Handler {
+func writeToken(signer *jwt.Signer) iris.Handler {
 	return func(ctx iris.Context) {
 		claims := jwt.Claims{
 			Issuer:   "https://iris-go.com",
-			Audience: jwt.Audience{requestid.Get(ctx)},
+			Audience: []string{requestid.Get(ctx)},
 		}
 
-		j.WriteToken(ctx, claims)
-	}
-}
-
-func verifyToken(j *jwt.JWT) iris.Handler {
-	return func(ctx iris.Context) {
-		// Allow all GET.
-		if ctx.Method() == iris.MethodGet {
-			ctx.Next()
+		token, err := signer.Sign(claims)
+		if err != nil {
+			ctx.StopWithStatus(iris.StatusInternalServerError)
 			return
 		}
 
-		j.Verify(ctx)
+		ctx.Write(token)
 	}
 }

_examples/database/mysql/go.mod

@@ -4,6 +4,6 @@ go 1.15
 
 require (
 	github.com/go-sql-driver/mysql v1.5.0
-	github.com/kataras/iris/v12 master
+	github.com/kataras/iris/v12 v12.2.0-alpha.0.20201117050536-962ffd67721a
 	github.com/mailgun/groupcache/v2 v2.1.0
 )

_examples/database/mysql/main.go

@@ -11,6 +11,8 @@ import (
 	"github.com/kataras/iris/v12"
 )
 
+// $ go build .
+
 func main() {
 	dsn := fmt.Sprintf("%s:%s@tcp(%s:3306)/%s?parseTime=true&charset=utf8mb4&collation=utf8mb4_unicode_ci",
 		getenv("MYSQL_USER", "user_myapp"),