How to make async http request from jmeter while changing path dynamically before each call

Question

Following are the steps that I need to peform

Make http request call to a sevice which returns a json that has many urls.
Extract all the urls using regular expression extractor
Make http request call to all the exctracted urls asynchronously.

Is there a way we can achieve this? I tried parallel controller but, if I am not wrong, it requires all the request to be mentioned as its child sampler. I don't want to write each and every request manually. Is there a way we can change urls dynamically after running the test plan?

You can check BeanShell for doing pre and post processing [specially executing scripts i.e. in you case parsing json etc.] https://dzone.com/articles/beanshell-processor-in-jmeter and https://www.blazemeter.com/blog/how-use-beanshell-jmeters-favorite-built-component — codinnvrends, Jun 23 '20 at 08:40
A related post is here https://stackoverflow.com/questions/24512365/jmeter-run-a-python-script-before-calling-each-http-request-sampler — codinnvrends, Jun 23 '20 at 08:54

score 0 · Accepted Answer · answered Jun 23 '20 at 16:09

It's better to use JSON Extractor if the server returns URLs in JSON format
Once you have the URLs in form of JMeter Variables like:
```
url_1=http://example.com
url_2=http://example.org
........
........
url_matchNr=X
```
- add Parallel Sampler to your Test Plan
- add JSR223 PreProcessor as a child of the Parallel Sampler
- Put the following code into "Script" area:
```
 1.upto(vars.get('url_matchNr') as int, { index ->
     sampler.addURL(vars.get('url_' + index))
 })
```

How to make async http request from jmeter while changing path dynamically before each call

1 Answers1