Proposal/file upload configurations

[jackey8616]

Currently in express/koa we have multer, hapi itself can handle file upload.

I've notice that we provides multerOptions in tsoa.json for preset a global multer instance.
But such option is not event fit for hapi users.

When the #1483 gives the idea of custom instance of multer,
I think its time to make something more 'general' for all users.

Here is my proposal:

1. Stop using tsoa.json's multerOptions, we can mark it as deprecated, after keep supporting it for few versions then remove it.
2. Define a global(for express/koa multer & hapi config) file upload config as RegisterRoutes parameter, allow users to provide it in there server.ts.
3. There must be some needs on setting different upload destination path or file size limitation for endpoints, thus, we should introduce some kind of decorator like @UploadOptions takes more options and merge with default global configuration to provides different uploading setup for each endpoint.

[jackey8616]

@WoH any suggestion?

[WoH]

Sorry, missed this so far. Btw, you can tag it as help wanted or pending feedback to avoid the bot.

Is it enough to provide this once for the entire app? I am worried the next follow up would be multer config for down to per Endpoint level.

[jackey8616]

Sorry, missed this so far. Btw, you can tag it as help wanted or pending feedback to avoid the bot.

Is it enough to provide this once for the entire app? I am worried the next follow up would be multer config for down to per Endpoint level.

I think the global options we provides in RegisterRouter parameter could cover all.