插入JS或者替换特定文件

somalia

    1.对指定网站的js文件重定向，这样我可以编辑它，弹出个页面啊、导航什么的，增加点收入。
    2.还有企业对文件下载的控制，比如上班时间禁止下载视频文件，rmvb，avi，mkv等等等等的视频格式，但是我要对文件进行替换，如果他下载视频，我可以给他替换成下载我企业的宣传片。   

You really make it seem so easy with your presentation but I find this matter to be actually something which I think I would never understand. It seems too complex and extremely broad for me. I am looking forward for your next post, I’ll try to get the hang of it!
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