Handling Empty Body in Nest.js for Form Data

Question

Handling Empty Body in Nest.js for Form Data

I am encountering an issue with a simple controller that I have. Within this controller, there is an endpoint defined as follows:

@Post('/temp')
async asdf(
  @Body() form: Record<string, string>,
  @Res({ passthrough: true }) response: Response,
) {
  this.logger.debug(JSON.stringify(form));
  await response.json({ ok: true, form: JSON.stringify(form) });
}

When attempting to POST form data to this endpoint via cURL or the browser, I notice that the object form is empty.

For example:

curl -X POST http://localhost:4000/mycontroller/temp -H "Content-Type: application/x-www-form-urlencoded" -d "param1=value1&param2=value2"

This results in:

{"ok":true,"form":"{}"}

All other controllers are functioning properly, and upon inspection, I cannot identify any notable differences between my controller and those of others.

What could be the issue or what am I potentially missing?

javascript express nestjs

Answer 1

Answer №1

To handle form data effectively, you should consider implementing a form data parser such as busboy or multer. With Nest, integration with multer and express is seamless through the use of the FileInterceptor and its variations. This compels multer to parse the incoming request. In cases where only form data without files is being used, there may be an option like NoFileInterceptor.

If it turns out that there is no NoFileInterceptor, an alternative approach could involve utilizing AnyFileInterceptor while disregarding the req.files. However, exercise caution as this method could potentially put your server at risk if malicious files are sent for parsing by multer.

Answer 2

To handle form data effectively, you should consider implementing a form data parser such as busboy or multer. With Nest, integration with multer and express is seamless through the use of the FileInterceptor and its variations. This compels multer to parse the incoming request. In cases where only form data without files is being used, there may be an option like NoFileInterceptor.

If it turns out that there is no NoFileInterceptor, an alternative approach could involve utilizing AnyFileInterceptor while disregarding the req.files. However, exercise caution as this method could potentially put your server at risk if malicious files are sent for parsing by multer.

Handling Empty Body in Nest.js for Form Data

Answer №1

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