Method ServeFileWithRate

context/context.go:5478–5507

ServeFileWithRate same as `ServeFile` but it can throttle the speed of reading and though writing the file to the client.

(filename string, limit float64, burst int)

// ServeFileWithRate same as `ServeFile` but it can throttle the speed of reading
// and though writing the file to the client.
func (ctx *Context) ServeFileWithRate(filename string, limit float64, burst int) error {
	f, err := os.Open(filename)
	if err != nil {
		ctx.StatusCode(http.StatusNotFound)
		return err
	}
	defer f.Close()

	st, err := f.Stat()
	if err != nil {
		code := http.StatusInternalServerError
		if os.IsNotExist(err) {
			code = http.StatusNotFound
		}

		if os.IsPermission(err) {
			code = http.StatusForbidden
		}

		ctx.StatusCode(code)
		return err
	}

	if st.IsDir() {
		return ctx.ServeFile(path.Join(filename, "index.html"))
	}

	ctx.ServeContentWithRate(f, st.Name(), st.ModTime(), limit, burst)
	return nil
}

// SendFile sends a file as an attachment, that is downloaded and saved locally from client.
// Note that compression can be registered