Preface ：

During interface testing , Sometimes you will encounter an interface that needs encryption and decryption , Now I will introduce how to target MD5 Encryption interface test , And for body Fingerprint signature for all parameters
1、 First of all, find the developer to understand the requirements , Know it's a http Type of post request , First, you need to get the timestamp (time), And then put appid、body、accessToken、time Count MD5 Encryption processing generates sign, Then send the parameter to the information header to realize authentication , Use body Parameters for fingerprint signature , Can improve security
2、 What we need to do is ask the developer to get MD5 Encryption function (java Code ), And then through jmeter The preprocessor of BeanShell PreProcessor To deal with , This effect can be achieved

【 The end of the article left a lot of benefits for everyone 】

One 、 add to MD5 encryption jar package

1.  First, let the development provide MD5 Encryption method , Type this method as jar package , Then place it in apache-jmeter-4.0\lib\ext Catalog , It's restarting jmeter, such jmeter You can call the encryption method 

Two 、 add to BeanShell Sample Preprocessor 、HTTP request

1.  add to HTTP request ,- Select thread group , Click on the right , add to 》Sampler》HTTP request 

2. add to BeanShell request - Choose HTTP request , Click on the right , add to 》 Preprocessor 》BeanShell PreProcessor

3.  The code is as follows , First import introduce jar package , Then define time Variable , Use it directly jmeter Bring their own time Function to get the timestamp ,param That's what I said above body Parameters , hold time、param Variables to put It's Jean HTTP The request header can call it , And then in defining sign Variable , Call the introduced jar Package encryption method , Last in put

import com.course.testng.*;  // quote jar package 
String time = "${__time(,)}";   // Get the timestamp 
String param ="{\"activeId\":\"${activeId}\",\"method\":1,\"userId\":${userId},\"userName\":\" automation \",\"userPhone\":\"${mobile}\",\"userHome\":\"${familyName}\",\"communityId\":${communityId},\"houseId\":${houseId},\"houseName\":\"1\\\\/ Unit one \\\\/103\"}" ;  
vars.put("time",time);         // Set as jmeter Variable 
vars.put("param",param);  // Set as jmeter Variable , convenient HTTP Request calling , This only needs to be done in beanshell Maintain a set of parameters , Without repeated maintenance 
String sign = Encrypt1.test("1120",param,"${accessToken}",time);  // call MD5 Encryption method , Generate sign
vars.put("sign",sign);         // Set as jmeter Variable 

4.HTTP Request directly in body data call ${param} that will do 

5. add to HTTP Header Manager - Choose HTTP request , Click on the right , add to 》 The configuration element 》HTTP Header Manager 

3、 ... and 、 Perform the requested

1.  Click the start button on the page , You can see that the script executes normally , The response result is normal , This script development is complete , You can call this script directly to test 

Four 、 The pit encountered in developing this script

1.  Execute script prompt SIGN_ERROR, Finally, check with the development java Encryption code , It is found that there is Chinese in the request parameters , then md5 Failure to specify the encoding type resulted in , Specify the code as UTF-8 that will do 

   2.  Execute script message error, View log tips Error invoking bsh method:eval sourced file: , After investigation , The reason is that there are \\/, It needs more \\ Just escape , As shown below 

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