How to solve the problem of 400 bad request when the web page displays

Solution: 1. Check the request URL to ensure that the requested URL is correct; 2. Check the request method to ensure that the request method used is consistent with the method expected by the server; 3. Check the request header to ensure that the request header information is correct. And it is consistent with the expectations of the server; 4. Check the request body to ensure that the format of the request body is correct; 5. Check the parameters to ensure that all necessary parameters have been provided and that the format of the parameters is correct; 6. Check whether the size of the request exceeds the limit; 7. If none of the above methods solve the problem, you can use some tools for debugging.