Requesting a piece of data returns empty content or an error. How to request again several times?

Question

How to request a data if the returned content is empty or wrong? How to request several times again? If you still can’t get it after requesting for a specified number of times, filter it directly. How to write it? Masters>o<ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

Answer 1

Can't you just add a loop to judge, jump out when you get the value, and if the value is still empty after a certain number of loops, release it, and then make a judgment later

Answer 2

Are there any bosses?