add iris.Patches() to modify global behaviors

_examples/response-writer/json-third-party/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"github.com/kataras/iris/v12"
+
+	// This is a 3rd-party library, which you can use to override the default behavior of ctx.JSON method.
+	"github.com/bytedance/sonic"
+)
+
+func init() {
+	applyIrisGlobalPatches() // <- IMPORTANT.
+}
+
+func applyIrisGlobalPatches() {
+	var json = sonic.ConfigFastest
+
+	// Apply global modifications to the context REST writers
+	// without modifications to your web server's handlers code.
+	iris.Patches().Context().Writers().JSON(func(ctx iris.Context, v interface{}, options *iris.JSON) error {
+		enc := json.NewEncoder(ctx.ResponseWriter())
+		enc.SetEscapeHTML(!options.UnescapeHTML)
+		enc.SetIndent("", options.Indent)
+		return enc.Encode(v)
+	})
+}
+
+// User example struct for json.
+type User struct {
+	Firstname string `json:"firstname"`
+	Lastname  string `json:"lastname"`
+	City      string `json:"city"`
+	Age       int    `json:"age"`
+}
+
+func main() {
+	app := iris.New()
+
+	app.Get("/", func(ctx iris.Context) {
+		user := User{
+			Firstname: "Gerasimos",
+			Lastname:  "Maropoulos",
+			City:      "Athens",
+			Age:       29,
+		}
+
+		// Use ctx.JSON as you used to.
+		ctx.JSON(user)
+	})
+
+	app.Listen(":8080")
+}