ch14.4

cmd/api/helpers.go

@@ -120,3 +120,14 @@ func (app *application) readInt(qs url.Values, key string, defaultValue int, v *
 	}
 	return i
 }
+
+func (app *application) background(fn func()) {
+	go func() {
+		defer func() {
+			if err := recover(); err != nil {
+				app.logger.PrintError(fmt.Errorf("%s", err), nil)
+			}
+		}()
+		fn()
+	}()
+}

cmd/api/users.go

@@ -52,11 +52,12 @@ func (app *application) registerUserHandler(w http.ResponseWriter, r *http.Reque
 		return
 	}
 
-	// err = app.mailer.Send(user.Email, "user_welcome.tmpl", user)
-	// if err != nil {
-	// 	app.serverErrorResponse(w, r, err)
-	// 	return
-	// }
+	app.background(func() {
+		err = app.mailer.Send(user.Email, "user_welcome.tmpl", user)
+		if err != nil {
+			app.logger.PrintError(err, nil)
+		}
+	})
 
 	err = app.writeJSON(w, http.StatusCreated, envelope{"user": user}, nil)
 	if err != nil {