[ERROR] 15:13:55 Error: Cannot set headers after they are sent to the client

[yizhishiliu]

🔎 Search Terms

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

🕗 Version & Regression Information

• This is a crash
• This changed between versions ______ and _______
• This changed in commit or PR _______
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
• I was unable to test this on prior versions because _______

⏯ Playground Link

No response

💻 Code

// Your code here

🙁 Actual behavior

Using typescript to write the backend interface, this error message appears after a normal response to a request, causing the entire program to end abnormally, unable to respond to subsequent requests.
[ERROR] 15:13:55 Error: Cannot set headers after they are sent to the client

🙂 Expected behavior

The request is responded to normally and does not affect the normal execution of other requests.

Additional information about the issue

No response

[MartinJohns]

This is completely unrelated to TypeScript.

[yizhishiliu]

Adding "@res() res: Response" to the controller's method parameter successfully solved the response problem.

As:

`
import { Controller, Get, Res } from '@nestjs/common';
import { Response } from 'express';

@controller('test')
export class CatsController {
@get()
testRes(@res() res: Response) {
res.status(200).send('OK');
}
}
`

[RyanCavanaugh]

It looks like this is a question rather than a bug report. This issue tracker is for tracking bugs and active work on TypeScript itself, rather than a general forum for programmers using TypeScript to get help or ask questions.

You can ask questions on sites like Stack Overflow. We are not able to provide one-on-one support on the issue tracker. Please read the issue template carefully - it has important information on what kinds of reports can be acted on here, as well as links to useful TypeScript resources. Thanks!