[JMeter] two ways to realize interface Association: regular representation extractor and JSON extractor

Generally speaking, association is to intercept the part of the returned content of the last request and store it as an argument , Used to pass on to the next request .

Example ：

　　1. Login with user password , Generate after login authentication

　　2. You need to add the login interface response results authentication As an argument , Pass to the next interface

　　 Here's the picture , You need to extract the authentication Pass to the next appointment order list interface header in

 

One 、 Using regular representation extractor to implement interface Association

1. How to add ： On requests for information （ In this scenario, the login interface ） Right click --> Post processor --> Select the regular representation extractor

  The argument says ：

　　 Reference name ： The name of the argument to be referenced in the next request , If you fill in authentication, You can use ${ authentication} Quote it .

　　 Regular expressions ：() The enclosed part is to extract .. For any character ,+ Represents one or more times ,* For any number of times .（ Specific regular expression rules can be Baidu ）

　　 Templates ： use $$ To quote , If there are more than one regular expression in a regular expression , It can be $2$,$3$ wait , Represents the number of values parsed to authentication. There is only 1 One , All use $1$.

　　 Match numbers ：0 For random ,-1 On behalf of all , The remaining positive integers represent what will be checked , The first matching content is extracted .

 

2. Use in the following interface ${authentication} quote

 

Two 、 Use json The extractor implements Interface Association

   Where to use ： Interface Association , The current data type returned by an interface is json Format information , Need to return from json Extract data from data .

 

1. How to add ： On requests for information （ In this scenario, the login interface ） Right click --> Post processor --> Choice JSON Extractor

 

　 The argument says ：　

　　Name of created varialies： The name of the argument to be referenced in the next request , If you fill in authentication, You can use ${ authentication} Quote it .

　　JSON Path  expressions： Fill in jsonpath, Format ：$. Node name     The root node uses “.” Express

　　Match Numbers：0 For random ,-1 On behalf of all , The remaining positive integers represent what will be checked , The first matching content is extracted .

　　Default Values： Default value when not found , It is generally set to NOT FOUND

　　Compute concatenation var(suffix_ALL)： Whether to count all , Store all matched values , It's called “ Variable name _ALL”

2. Replace the variable with ${ Variable name }

3、 ... and 、 Back to complexity json Data extraction

For example, get the data of array type ： The second one item First of all hospTags in name value , You can first check the results of tree species selection Json Path Tester View the corresponding data returned ,Json Path Expression Input needs to be done through jsonpath Method to get the value, click Test Check that the results are correct

 

How to add ： Right click --> Post processor --> Choice JSON Extractor