I use JMeter 4, I have a problem in a JMeter JSON Path Extractor.
I have done an HTTP Request (POST) to a service that I wan't to test.
Response data from the service is
{"rid":"661ff2d7-12e8-e811-8110-00215a9b9851",
"participation":{"rid":"ed8cfced-0063-4fda-92fd-b23f50197797"}}
I wan't to extract the first GUID witch is allocated to the first rid.
As JSONPath Expression I have used $.rid and wan't to assign that value to a JMeter variable. Therefore I have checked the radio button JMeter variable and entered my JMeter variable which is int_rid.
When I execute my JMeter testplan the int_rid variable will be null.
In JSON Extractor If you check the radio button JMeter variable it expect to search inside the contents of JMeter variable, which you don't want, usually Main sample only is enough
Main sample only - only applies to the main sample
Sub-samples only - only applies to the sub-samples
Main sample and sub-samples - applies to both.
JMeter Variable Name to use - assertion is to be applied to the contents of the named variable
Put int_rid in Names of created variables field and chose Match No. 1 to find the first value
Related
I do a POST request using Jmeter and I parse the JSON response using the JSON extractor. When i use the debug sampler I could see the Variable is assigned with the value properly but that value goes as null in the subsequent request
Below is the request URL for the next sample /XXX/XXX/XXX/XX/${recordingjobid}
but this value recordingjobid is not substituted with the value.
I can only think of not proper placement of the JSON Extractor.
For example if you have it at the same level as several samplers - it will be run after every of them (including the Debug Sampler) and each next one will be overwriting the value set by the previous one as JMeter Variables are local to the thread and don't allow duplicates.
So my expectation is that if you move the JSON Extractor to be a child of the request which returns the JSON - it should resolve your issue.
More information: JMeter Scoping Rules - The Ultimate Guide
I have an http request that uses an extractor to set a JMeter variable (lets call it test) from the body. When I look at the debug controller I can see this works fine. Next I want to append something to the beginning of the variable so I add a user defined variable node and add a variable with the name new and I set the value to ${test}. However when I look in the debug response I see ${test} instead of the value.
I tried the same thing setting the value manually in 2 different UDV nodes and it works fine, so how do I append to a JMeter variable declared in an extractor?
As per JMeter Documentation:
The User Defined Variables element lets you define an initial set of variables, just as in the Test Plan.
Note that all the UDV elements in a test plan - no matter where they are - are processed at the start.
So the User Defined Variables element will be read only once and only when the Test Plan is started.
If you need to overwrite the current variable with a new value you can go for i.e. __groovy() function, the relevant syntax would be something like:
${__groovy(vars.put('foo'\, 'some_prefix_' + vars.get('foo')),)}
Demo:
vars is a shorthand for JMeterVariables class instance, it provides read-write access to all JMeter Variables in the current thread scope. Check out The Groovy Templates Cheat Sheet for JMeter to learn what else you can do with Groovy scripting in JMeter tests
UDVs can't be used in dynamic way because they are process once at the start of the test.
Don't use UDV, use JSR223 Sampler (or PostProcessor) with vars;
vars.put("new", "prefix"+ vars.get("test"))
Another option is to use Set Variables Action plugin
My task is to make a request and save some data from the headers in a variable and use it later in another requests.
So I've added an http request and added an regular expression extractor. Here is my setup:
And then I've created another request and I'm using the LocationToken variable, but there the variable has the default value (dd). here is the response:
So, as you can see, the pattern patches on the headers. So what have I done wrong?
In Regular Expression Extractor, under Apply to section, you should select Main sampler and sub-samplers option but not JMeter Variable.
Regular Expression Extractor saves the value into the variable which we specified in Reference Name field.
in the question,
Reference Name: LocationToken
in later request, you refer the value as follows:
${LocationToken}
I have a series of interconnected pages to test using JMeter. The problem is that the initial page has a Javascript variable in source section which is more of a session variable. This variable is passed in the URL for subsequent pages.
So basically I would like to fetch this javascript variable when I load the initial page from the source section and pass it to next URL(s).
Is there a way I can achieve this using JMeter.
Are you able to see the session variable in the response of initial page?
(in view result tree listener)
If yes, then correlate this value and pass the variable in to next request (use regular expression extractor for fetching the value, still if you are finding some issue in correlating the value than please share the response of first request over here so that I can provide you regx for that)
People mostly Regular Expression Extractor to fetch dynamic values from previous responses, in general the process looks like:
Add Regular Expression Extractor as a child of the request which returns desired data
Use Perl5-style regular expression to match what you're looking for
Provide a template to choose match group - ususally $1$ if you looking for a single value
Provide a reference name to refer the extracted value, i.e. foo
Use extracted value as ${foo} where required
You can visualise JMeter Variables using Debug Sampler and View Results Tree listener combination.
The easiest way to debug your regular expressions is using View Results Tree listener in "RegExp Tester mode"
See How to debug your Apache JMeter script article for more information on troubleshooting your JMeter test.
I have created a User Defined Variable with name as "Status" and a default value as "Started".
I got a HTML Response, with following content:
<SPAN id="ApplicationStatus"> Interrupted</SPAN>
I want to get the Span Id value and use in beanshell samplers to process further either in If Controller or Switch Controller.
I used Regular Expression extractor to extract the value needed and its working too.
But when i say vars.get("Status") will always return me the default value "Started".
Is there a way where i can extract the required value "Interrupted" and substitute that to the user defined variable "Status"?
Yes you can get that value of #ApplicationStatus into your User Defined Variable (UDV).
You can use regex but really you shouldn't for this type of parsing I'm not going to get into many reasons why.
Here is how you can do it using alternative (better solution IMHO) :
String html = "<SPAN id=\"ApplicationStatus\"> Interrupted</SPAN>";
Document doc = Jsoup.parse(html);
String value = doc.select("#ApplicationStatus").first().text();
//Put value in UDV Status
vars.put("Status", value);
You can add this to your sampler that does this kind of parsing i.e Beanshell sampler, here are the imports (which go above this code) :
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
Please note that this code is Jsoup dependent so you will need to download jsoup jar and put it in your $JMETER_HOME/lib directory.
Hope this sheds some light on your issue.
Update
If you want to avoid Java, I've written small jmeter post processor component that extracts text value from HTML element. Take a look at :
https://github.com/c0mrade/Html-Extractor
If you go over the steps how to install the post processor from the page above, you would use it as follows :
Right click on your sampler. Add a Post Processors -> Html Extractor , in the jquery selector field write #ApplicationStatus and store result in variable of your choice (Status). Following this add Debug Sampler, if in your Debug sampler there is variable Status with the value Html Extractor is working! you're done!
I can't reproduce your issue.
Here is my plan:
- User defined variables with variable Status
- Thread Group
- HTTP Request
- Regular expression extractor with reference name = Status
- Beanshell Sampler that logs Status variable
Beanshell sampler logs value that was received in Regular Expression Extractor