前端：JQ
// 待发字符串：str = "这是要发的字符串"
var str_encode = encodeURI(str) //[gbk编码]
// str_encode = %E3%80%8C%E3%82%82%E3%81%86%E5%B0%84%E7%B2
后端：Python
from urllib.request import unquote
// str_encode = %E3%80%8C%E3%82%82%E3%81%86%E5%B0%84%E7%B2
str_decode = unquote(str_encode)
// str_decode = "这是要发的字符串"