Cross Site Scripting
Cross Site Scripting
反射型
发送请求时， xss代码会出现在url中，作为输入提交到服务器端。服务器端解析后响应，xss代码随内容一起穿回给浏览器，最后浏览器端执行xss代码。整个过程像一次反射，故叫反射型xss。
存储型
存储型xss和反射型的区别在于， 提交的代码会存储在服务器（数据库，内存，文件系统等），下次请求目标页面的时候不用再提交xss代码
xss防御措施
1.编码
< < > >
2.过滤
移除用户写的DOM属性 如onerror等
移除用户上传的style script iframe节点
3.校正
避免直接对html entity 解码
使用DOM Parse准换，校正不配对的DOM标签
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