Do you really understand fiddler, a necessary tool for testing?

Written in the book before

Fiddler It's a very powerful tool , Not only can you grab bags , It can also be used to send requests , Simulate the abnormal test of various scenarios , Mastering this tool will make your testing work even better .

I usually use it when I need to grab bags , Capturing packets is to know which request I need to send and what parameters , At this time, you usually don't know which way to go URL Which parameters are sent , Under what circumstances do you not know ?

When you don't have an appointment with the developer , They have no interface documentation or nothing .

This kind of time also shows a problem ： You didn't do a good job in the early stage of development , You should intervene in the demand phase , After entering the development stage, you should actively participate in the development of application design , Agree with them what this interface should be like 、 What parameters , Make these appointments .

Of course , When agreeing on the first edition , These are definitely not the final version , That's not afraid , But there must be , Only when you have these things can you prepare in advance , and Fiddler In fact, it is used in this helpless situation .

therefore , Anyway , You need to understand the functions of this tool thoroughly .

Official website

www.fiddler2.com.

install

Click in the figure above "Download Now" You can enter the directory , Here's the picture , After filling in the relevant information, you can conduct the Fiddler.

Fiddler2 Is based on .net framework2.0,Fiddler4 be based on .net framework4.0.

As we usually use win7/win10 The system is installed by default .net framework4.0, Like some old operating systems , Such as windows xp Should download .net framework2.0,Fiddler2 It may be eliminated in the future , Now generally downloaded Fiddler All are Fiddler4.

notes ：beta Version means the author is still developing , It's not perfect .

After downloading, there is a exe Run the file , Just follow the prompts to install in the next step .

Interface description

Mastery of tools , Determines your work efficiency 、 The speed of solving problems .

Fiddler Why can I grab bags ?

Fiddler It is actually a proxy tool ,Fiddler Default port for 8888, When it starts, it will change the proxy server of the system to itself , In this way, you can grab bags . You can go to the computer Control panel -Internet Option to view the address of the proxy server .

notes ： Knowing this will help you when you encounter inexplicable problems , More screening ideas .

When Fiddler After closing and exiting , Will automatically cancel the proxy , Pictured , It is no longer checked here .

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