How to execute two requests in a row?

Question

Node.js

I have validation functions. I moved them into separate functions and call them in route handlers.

// CHECK VALID URL
const checkValidUrl = async (req, res) => {}

// CHECK RIGHTS
const checkRights = async (req, res) => { }

Call:

// CHECK URL
router.post('/url', async(req, res) => checkValidUrl(req, res));

// CHECK RIGHTS 
router.post('/rights', async (req, res) => checkRights(req, res));

When I try to execute two functions in a row, I get an exception

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

I believe that when the first function is executed, the object req, res is already 'busy', and when the second one tries to take them, it is refused. Question. How to make two requests in a row. It can be combined into one function, where there will be "common" req, res, but how? I tried to complete each function through res.end (). Same error. Maybe you can somehow reset these objects after execution? Tell me what to do.

Answer 1

As far as I know, only one response is possible for one post coming from a client. Both should be included in the same answer.

Answer 2

Apparently you have an error somewhere in the code of the handler functions, show what is there.