Accept default express parameters in middleware function.

[RahulLanjewar93]

Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Issue

Currently, the middleware function does not accept the express default parameters

parse-server/src/Options/index.js

Lines 247 to 248 in 4450ecb

	/* middleware for express server, can be string or function */
	middleware: ?((() => void) | string);

However, the middleware is directly supplied to express in

parse-server/src/ParseServer.js

Lines 302 to 310 in 4450ecb

	if (options.middleware) {
	let middleware;
	if (typeof options.middleware == 'string') {
	middleware = require(path.resolve(process.cwd(), options.middleware));
	} else {
	middleware = options.middleware; // use as-is let express fail
	}
	app.use(middleware);
	}

So we should be able to pass req,res,next parameters

Actual Outcome

Not able to pass the default express parameters req,res,next to the middleware function

Expected Outcome

Should be able to pass req,res,next parameters

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[RahulLanjewar93]

@mtrezza I guess we should be adding default parameters here?

[mtrezza]

Is this a bug or a feature request?

[RahulLanjewar93]

It should be classified as issue I think because we missed it during initial implementation

[mtrezza]

If Parse Server works as described then this would be a feature request. What is the functionality of Parse Server that is currently not working? I understand that "the middleware function does not accept the express default parameters", but that may be just an intended limitation, not a bug. The reason I'm asking is because a bug may be prioritized differently.

[RahulLanjewar93]

Server seems to be working fine.
I needed to use a middleware, but due to the type of middleware being a function without any parameters, it was giving out an error.

[mtrezza]

Then this sounds like a feature request.

[RahulLanjewar93]

Then this sounds like a feature request.

Yea