code: func (ctx *RequestCtx) Init(req *Request, remoteAddr net.Addr, logger Logger) {
  	if remoteAddr == nil {
  		remoteAddr = zeroTCPAddr
  	}
  	c := &fakeAddrer{
  		laddr: zeroTCPAddr,
  		raddr: remoteAddr,
  	}
  	if logger == nil {
  		logger = defaultLogger
  	}
  	ctx.Init2(c, logger, true)
  	req.CopyTo(&ctx.Request)
  }
docs: // Init prepares ctx for passing to RequestHandler.
  //
  // remoteAddr and logger are optional. They are used by RequestCtx.Logger().
  //
  // This function is intended for custom Server implementations.