Allow user to specify temporary upload directory

[joaogodinho]

I added a parameter to the initialization of the module to allow a user to specify where to initially save uploaded files (multer dest param).

I made this as a solution to the fs.rename. If the destination path is mounted in a different device as the multer destination folder, a EXDEV is raised.

[dekyfin]

Thanks for your contribution to make RFM-node better. I would like you to make a couple of minor changes for forward compatibility.

1. Instead of passing the temp dir as the third parameter of the middleware, let it be an object like this: {tempDir: /path/to/temp}. This way, we can add other configurations in the future.

2. The default tempDir should be changed from public/ to .tmp so it doesn't conflict with existing files

3. I would appreciate it if you could add a section to the Readme that talks about the new options being introduced

Looking forward to your further contribution. Thanks

[joaogodinho]

Hi,

Maybe use the already existing config file/path for it then? e.g. if there is a multer object in the config, pass it to multer? Or is that config strictly for the rich file manager options and shouldn't include implementation specific stuff?

[dekyfin]

Exactly. The existing config is for RichFileManager and not implementation configuration. I would like us to use the third parameter for extra config

[iainbryson]

Hello!

Good timing, I'm running into the same issue.

I'm wondering why not use a package like https://www.npmjs.com/package/mv instead (or in addition). In my case, it would be cleaner to not have the temp folder in the target directory (which is mounted as a shared docker volume and it meant to contain only the public files).