add simple parse example

example_parse_test.go

@@ -0,0 +1,30 @@
+package jwt_test
+
+import (
+	"fmt"
+
+	"github.com/cristalhq/jwt"
+)
+
+func Example_ParseSimple() {
+	t := `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJhZG1pbiIsImp0aSI6InJhbmRvbS11bmlxdWUtc3RyaW5nIn0.dv9-XpY9P8ypm1uWQwB6eKvq3jeyodLA7brhjsf4JVs`
+
+	token, err := jwt.Parse([]byte(t))
+	if err != nil {
+		fmt.Printf("parse err: %q", err)
+		return
+	}
+
+	fmt.Printf("Algorithm %v\n", token.Header().Algorithm)
+	fmt.Printf("Type      %v\n", token.Header().Type)
+	fmt.Printf("Claims    %v\n", string(token.RawClaims()))
+	fmt.Printf("Payload   %v\n", string(token.Payload()))
+	fmt.Printf("Token     %v\n", string(token.Raw()))
+
+	// Output:
+	// Algorithm HS256
+	// Type      JWT
+	// Claims    {"aud":"admin","jti":"random-unique-string"}
+	// Payload   eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJhZG1pbiIsImp0aSI6InJhbmRvbS11bmlxdWUtc3RyaW5nIn0
+	// Token     eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJhZG1pbiIsImp0aSI6InJhbmRvbS11bmlxdWUtc3RyaW5nIn0.dv9-XpY9P8ypm1uWQwB6eKvq3jeyodLA7brhjsf4JVs
+}