TypeError: "string" must be a string, Buffer, or ArrayBuffer at abortConnection

[shapel]

You want to:

• report a bug
• request a feature

Current behaviour

When you use allowRequest and pass error as number (like internal Server.errorMessages but in other range) system throw TypeError exception.

Steps to reproduce (if the current behaviour is a bug)

const server = io(httpServer, {
    allowRequest: (req, callback) {
      // do some checks
      callback(403, false);
    },
    path: '/socket.io'
  })

Expected behaviour

Do not throw exception.

Setup

• OS:
• browser:
• engine.io version:

Other information (e.g. stacktraces, related issues, suggestions how to fix)

TypeError: "string" must be a string, Buffer, or ArrayBuffer\n    at Function.byteLength (buffer.js:481:11)\n    at abortConnection (\node_modules\engine.io\lib\server.js:507:25)\n    at \node_modules\engine.io\lib\server.js:354:7\n    at Server.allowRequest ```

[shapel]

#562