unityweb-encoding

Connect/Express middleware to apply proper Content-Encoding to .unityweb (Unity WebGL) files.

Usage

const 
  connect = require('connect'),
  serveStatic = require('serve-static'),
  unitywebEncoding = require('unityweb-encoding');
// pathRoot: the root dir of server files
connect()
  .use(unitywebEncoding.serveHeader(pathRoot))
  .use(serveStatic(pathRoot))
  .listen(8000);

API

serveHeader(pathRoot)

Creates a Connect/Express middleware that applies proper Content-Encoding to .unityweb (Unity WebGL) files. It reads the first bytes of the file to detect if it's brotli, gzip or uncompressed.

Returns: (req: http.IncomingMessage, res: http.ServerResponse, next: (err?: any) => void) => void
The Connect/Express middleware function, which always calls next().

Params:

pathRoot: string
The root directory for serving files in the route in which this middleware will be used.

detect(input, br, gzip)

Detects the encoding of a .unityweb file from its header.

Returns: string?
'br' or 'gzip' if that encoding is detected, null otherwise.

Params:

input: Buffer?
The beginning of the file.
br: boolean
Should it try to detect brotli? If true, input should have the first 39 bytes of the file.
gzip: boolean
Should it try to detect gzip? If true, input should have the first 301 bytes of the file.