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// 替换 ioutil.ReadAll
func ReadAll(data io.ReadCloser) (body []byte) {
	buffer := bytes.NewBuffer(make([]byte, 0, 65536))
	io.Copy(buffer, data)
	temp := buffer.Bytes()
	length := len(temp)
	if cap(temp) > (length + length/10) {
		body = make([]byte, length)
		copy(body, temp)
	} else {
		body = temp
	}
	return
}