package gopay

import (
	"bytes"
	"math/rand"
	"time"
)

//获取随机字符串
//    length：字符串长度
func GetRandomString(length int) string {
	str := "0123456789AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
	b := []byte(str)
	var result []byte
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	for i := 0; i < length; i++ {
		result = append(result, b[r.Intn(len(b))])
	}
	return string(result)
}

func generateXml(w requestBody) (reqXml string) {
	buffer := new(bytes.Buffer)
	buffer.WriteString("<xml>")

	for k, v := range w {
		buffer.WriteString("<")
		buffer.WriteString(k)
		buffer.WriteString("><![CDATA[")
		buffer.WriteString(v)
		buffer.WriteString("]]></")
		buffer.WriteString(k)
		buffer.WriteString(">")
	}
	buffer.WriteString("</xml>")
	reqXml = buffer.String()
	return
}