Packet capturing tool Fiddler learning

One 、fiddler brief introduction

1、 brief introduction ：

  1） It is on the client side and the server side HTTP agent 
  2） yes web A handy tool for debugging 

2、 function :

  1） Monitor the browser for all HTTP/HTTPS Traffic 
  2） see 、 Analyze the details of the request content 
  3） Forgery of client requests and server responses 
  4） Test the performance of the website 
  5） Decrypt HTTPS and web Conversation 
  6） overall situation 、 Local breakpoint function 
  7） Third party plug-ins 

3、 Use scenarios ：

• The interface test
• Online environment debugging
• web Performance analysis
• Before and after judgment bug
• development environment hosts To configure
• mock
• Weak network disconnection test

Two 、 Detailed explanation of message content

1、 Request message ：

1、 Request line （ Request method , Uniform resource locator ,http Protocol and version number ）
2、 Request header ： Additional information to initiate the request 
（host： Which host is 
	Accept: What is the received content , Format 
	user-Agent： Description of the user's client , System , Browser version description 
	conyent-type： Format of sending （ The format of the data , Coding of data ）
	reffer： Indicates from which website , Page initiated 
	Accept-language： What is the accepted language 
	cookie：）
3、 A blank line 
4、 Request body ： Actually sent content 

• Request method
  GitHub by restful style , It mainly uses the upper put、delete、get、post Request method

• Uniform resource locator （URL：uniform resource locator）： Used to describe resources on the Internet
  

 notes ：
host： Help to find the host address of the resource 
port： Determine a service of the server （3306： From the service mysql）
path： In a fixed path of a project 

• Request header ： Can be anything
  

referer： Prevent chain stealing 

2、 response message ：

1、 Response line （ Adopted protocol and version , Status code , Reason to describe ）
2、 Response head 
3、 Blank line 
4、 Response body 

set-cookie A piece of text returned by the server needs to be saved locally
last-modified: Compare the last modification time of the resource with the modification time saved to the local cache , If it's the same , Direct redirection , No longer return from the server .

3、 ... and 、fiddler Use of software ：

1、 The toolbar

1、 replay ：replay、 Click on R、 Replay many times ：shift+R（ Can test pressure , Replay the server many times ）
2、 Delete ： Just click delete、 Keep the current request , Delete other requests ：shift+delete
3、remove all： Clear all （ctrl+x）
4、shift+F5 Cache refresh
5、go： Breakpoint function , In the lower left corner of the software , Here's the picture Click Add breakpoint , Make it clickable to continue execution go
6、Stream： Flow mode , When used, it is generally in buffer mode , The data returned from the server is cached first fiddler Next , This is beneficial to other modes such as breakpoints
7、decode： decode , Some data sent back from the server needs to be decoded
8、keep all sessions： Number of sessions held
9、any process： Select the program to listen to
10、find（ctrl+f）： Find request , Respond to
11、save： Save the left and right data of the current page as a saz Archive file with suffix
12、a simple timer： timer
13、Browse： Open the browser
14、clear cache： clear ie Browser cache
15、textwizard: Codec tools
16、teaeoff： Separate the panel
17、online： Online information of this machine , for example ip

2、 Monitor dashboard （ Conversation list ）

1、 Every contract negotiation request captured , It's all one session
2、 It mainly contains the requested id Number , Status code , agreement , Host name ,url, Content type 、body size 、 Process information 、 Custom notes, etc

3、 You can insert ip Column ：

	1） Right click the header , Click on customize columns（ Custom columns ）
	2）rules->customize rules( Custom rule )-> Open the script -> Modify script content 

4、 The header can be moved in sequence
5、 The header can be sorted ： Click the header to sort

3、 Command line and status bar

1、bpu+ domain name ： Add breakpoints to the search domain name , Input again bpu It can be cancelled
2、 You can enter help Search for commands
3、capturing： Setting agent , You can make fiddler As a system agent
4、all process： Choose a conversation , You can only look at some processes
5、 Breakpoint function ： click , Before response ; Two o'clock , After response ;

4、 Auxiliary tags

1、 View performance information ： Select a captured message , And then click statistics（ Statistical performance ）dns Parsing time ,tcp/icp Connection time , The part of is used for web debugging
2、inspectors（ The viewer ）： Check the request （ Request message + response message ） Display the message form in different forms （raw You can view the original format ）
3、Autoresponder（ Auto responder ）： Can be used to intercept a request

1） Redirect to local resources 
2） Use fiddler Built in response to 
3） Custom response 

4、composer（ Designer ）： Used to design request message to execute , Simple interface testing tool , Get into scratchpad, Multiple messages can be viewed , Select the three click message to resend the request
5、filters filter ：
6、 The breakpoint ： Command line

1）bpu+ A domain name ： Breakpoint before request , Enter again bpu Cancel breakpoint 
2）bpafter+ A domain name ： Breakpoint after response , Click again go Return to client , Cancel 		
3） The breakpoint ： Input bpafter
4） Breakpoint scenario ： Network interruption 、 Extreme tests 

7、 Weak network test ：

• Mode one ：
  
• Mode two
  1） find fiddler script
  2） Search for simulate, You can set the time by yourself
  

Four 、 Grab the bag

1、 The computer HTTPS Grab the bag ：

tools->fiddler options->https
Check ：decrypt HTTPS traffic-> Installation certificate ->actions->reset all certificates

2、APP Grab the bag ：