I am looking for information useful for my little project that allows me to sniff web page received from a web server and before it appear in the browser I will test the content (text),then according to this test,my program blocks(or redirects) the page in case the test is false...
I found a very complete library is scapy, he can sniff and forge all the traffic including http replies..
I found someone looking to do similar things , but the response suggested to develop a proxy..
my question is: Is what it takes make a proxy? or just scapy
Smarty,
To answer your question yes you can do this with scapy but essentially you will be creating a proxy in the process.
As a matter of fact your request is practically the definition of a web proxy server.
dc
来源：https://stackoverflow.com/questions/9774525/how-to-filter-sniff-out-web-pages-according-to-datatext-contained