1. @app.on_request
    2. async def run_before_handler(request):
    3.     request.ctx.user = await fetch_user_by_token(request.token)
    5. @app.route('/hi')
    6. async def hi_my_name_is(request):
    7.     return text("Hi, my name is {}".format(request.ctx.user.name))
    1. @app.on_request
    2. async def increment_foo(request):
    3.     if not hasattr(request.conn_info.ctx, "foo"):
    4.         request.conn_info.ctx.foo = 0
    6.     request.conn_info.ctx.foo += 1
    8. @app.get("/")
    9. async def count_foo(request):
    10.     return text(f"request.conn_info.ctx.foo={request.conn_info.ctx.foo}")
    1. @app.route('/tag/<tag>')
    2. async def tag_handler(request, tag):
    3.     return text("Tag - {}".format(tag))
    1. $ curl http://localhost:8000?key1=val1&key2=val2&key1=val3
    1. >>> print(request.args)
    2. {'key1': ['val1', 'val3'], 'key2': ['val2']}
    4. >>> print(request.args.get("key1"))
    5. val1
    7. >>> print(request.args.getlist("key1"))
    8. ['val1', 'val3']
    10. >>> print(request.query_args)
    11. [('key1', 'val1'), ('key2', 'val2'), ('key1', 'val3')]
    13. >>> print(request.query_string)
    14. key1=val1&key2=val2&key1=val3