一般处理程序处理跨域
context.Response.AddHeader("Access-Control-Allow-Origin", "*");
context.Response.AddHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
context.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type");原文：https://www.cnblogs.com/mmArvin/p/11854436.html