frp/vendor/github.com/gorilla/websocket/conn_read_legacy.go

// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build !go1.5

package websocket

import "io"

func (c *Conn) read(n int) ([]byte, error) {
	p, err := c.br.Peek(n)
	if err == io.EOF {
		err = errUnexpectedEOF
	}
	if len(p) > 0 {
		// advance over the bytes just read
		io.ReadFull(c.br, p)
	}
	return p, err
}