Expose Formidable's onPart

[coada]

Feature Request Summary

So what I am trying to achieve is handle multipart/form-data with files, such that the file is not saved on disk. I need a stream/the content of files for parsing them further on, without having to go touch the file system.

The recommended way for Formidable is by providing a callback on each processed part, and then do an operation on the provided part (see https://stackoverflow.com/a/8760340/11599033). This requires setting onPart, but koa-body does not expose this?

My request is to either provide this option, or allow me to set my own Formidable object that I can modify on my own.

This request is similar to #36

Environment Information

• koa-body: 4.1.1
• Koa: 2.11.0
• Node.js: v12.13.1

[Louis-Tian]

@coada Having a similar issue right now? Wondering if you ever find a workaround for this. Thanks