如何在每次请求到达特定路由时，在flask应用中递增计数器变量？

from flask import Flask

app = Flask(__name__)
counter = 0

def increment_counter(func):
    def wrapper(*args, **kwargs):
        global counter
        counter += 1
        return func(*args, **kwargs)
    return wrapper

@app.route('/')
@increment_counter
def index():
    return 'Hello, World!'

@app.route('/about')
@increment_counter
def about():
    return 'About page'

@app.route('/counter')
def counter_route():
    global counter
    return f'Total Requests: {counter}'

if __name__ == '__main__':
    app.run()