form.parse callback is not called when run on Firebase functions (Node v8)

[helloforward]

Support plan

• which support plan is this issue covered by? (e.g. Community, Sponsor, or Enterprise):
• is this issue currently blocking your project? (yes/no): yes
• is this issue affecting a production system? (yes/no): yes

Context

• node version: 8 & 10
• module (formidable) version: 1.2.2 & 2.0.0-canary.20200504.1
• environment (e.g. node, browser, native, OS): Firebase functions
• used with (i.e. popular names of modules): Express
• any other relevant information:

What are you trying to achieve or the steps to reproduce?

exports.importExcelSpreadsheet = functions.https.onRequest(async (req, res) => {
  try {
    console.log('Parsing multipart form');

    const parsedForm = await new Promise((resolve, reject) => {
      console.log('Start parsing form');

      const form = new formidable.IncomingForm();
      form.parse(req, (err, fields, files) => {
        console.log('Finished parsing form');

        if (err) {
          return reject(err);
        }

        resolve({fields: fields, files: files});
      });
    });

    console.log('parsedForm', parsedForm);

    var file = parsedForm.files.fileToUpload;
    if (!file) {
      throw new Error("No file to upload, please choose a file.");
    }

    console.log('processing file ', file);
    res.status(200).send({});
  } catch (e) {
    res.status(500).send(e);
  }
});

What was the result you got?

The form.parse callback is never called.

What result did you expect?

The form.parse callback is called.

This seems similar to issue https://github.com/node-formidable/formidable/issues/396.

Wrapping the form.parse in a Promise is the recommended solution but it hasn't worked for me

• StackOverflow: Firebase cloud function for file upload
• StackOverflow: nodejs formidable async issue

What can I do to understand what's happening under the covers?

[tunnckoCore]

Yes, known issue. Use the package serverless-formidable. It will be integrated and handled in the next major release, so stay tuned and update to it when it's out of canary/beta.

[helloforward]

Great news, thx!

[helloforward]

@tunnckoCore I tried the latest canary release of formidable but that didn't work so maybe it's not currently in there. When do you think roughly the next major release will be?

[lexNwimue]

Had this same issue too, when I deployed my code to Google Cloud using Firebase Functions. Only had it fixed when I used formidable-serverless-2. Thanks, guys!

[czmarcos]

@lexNwimue do you have the link of this package? I did not found it. Thanks

[lexNwimue]

https://www.npmjs.com/package/formidable-serverless-2

There's also https://www.npmjs.com/package/formidable-serverless. But I didn't use this. I dunno if this is any different