fiddler: is a http protocol debugging proxy tool that can record and inspect http all communication between your computer and the Internet, set breakpoints, view data for all of the "out of" Fiddler (referring to the cookie , HTML, JS, CSS, etc. file). Fiddler Web Debugger than others to be more simple, because it not only exposed http newsletter also provides a user-friendly format. (Baidu Encyclopedia: https:? //Baike.baidu.com/item/Fiddler/2868968 fr = aladdin )
Official website (to be kexue Internet): https://www.telerik.com/fiddler
Forms of work
Proxy web server
process
Between the browser and the server, the HTTP protocol to communicate by establishing a tcp connection, the default browser sends an HTTP request to the server through their own. Use the proxy address: 127.0.0.1 , port: 8888
fiddler automatically set the proxy after opening, the agent will automatically log off when you quit.
[ Note ] When fiddler quit unexpectedly, it can cause pages are not accessible (not written off as fiddler). You need to restart the fiddler to resolve the problem.
Simple to use
1.fiddler display IP
IP address is not displayed by default, it requires custom code is used to display an IP address.
Open the user-defined script file: