JMeter - CSS/JQuery Extractor: what empty Render implementation means? - jmeter

In View Results Tree Render you can choose CSS/Jquery Implementation,
CSS/Jquery Implementation can be empty (third option)
Why do we need such option? is that used if we can add our own implementation? is it simply a bug (usually there's an edit option) ?
in JMeter code HtmlExtractor uses JSoup as default, but it is not shown in UI

Blank means : "No override, use default default implementation defined by property:
htmlParser.className=org.apache.jmeter.protocol.http.parser.JsoupBasedHtmlParser
If you set JSOUP or JODD, it means you override this for a particular element.
It is the same convention as for HTTP Request

Related

how to change the space value with% 20 in Jmeter

I have a problem, I'm doing a test with jmeter and I need to know how to change the value of a variable that has a space, example "pro va" with "pro% 20va" this because then this variable will be used to do a query on an endpoint example "www.google.com/search?q=pro%20va"
Use __javaScript() function to call encodeURIComponent() function:
${__javaScript(encodeURIComponent("${myVar}"),)}
Put your variable in "Path" field of the HTTP Request sampler - it will be encoded automatically
Demo:
If you have the choice - go for 2nd option as using JavaScript is some form of performance anti-pattern, if you target to use the approach for high loads - it's better to implement the encodeURIComponent() function in Groovy

Is it possible to extract dynamic values from the Response URL through JMeter before it appears in the Response?

Please refer the image displayed on clicking the link : https://i.stack.imgur.com/O0lSD.png
Questions:
Is it possible to extract the highlighted values - Blazor ID and Timestamp in JMeter even when the response fails? (Since these values are unique, dynamic and change for each session - it fails on rerunning them)
Is it possible to create/record > amend > run JMeter scripts when we have such dynamic and unique values involved?
Yes, you can extract them from URL using either Regular Expression Extractor or the Boundary Extractor, just make sure to use the appropriate "Field to check", in your case most probably it will be URL
With regards to the "timestamp" - it can be generated using JMeter's __time() function if it is not present anywhere.

AWS WebSocket API Gateway Template Selection Expressions examples

AWS API Gateway service page says that a Template Selection Expression can be used to implement a way to transform the request body. However the documentation for these selection expressions is very light and I haven't been able to find any examples.
Where can I find examples of what these expressions look like?
Where can I find what variables and options are available in these expressions?
To add content to the integration request, you'll need to use a Request Template. The Request Template is the piece that actually generates the new request body, while the Request Selection Template is used in the process of determining which Request Template to use.
Turn off HTTP Proxy Integration for your route. (You can't modify the request otherwise.)
Save your changes. (the Request Templates section won't appear until you do so.)
Set your Template Selection Expression. This is used to look up a value from the incoming request object. (If you want to match all incoming requests, enter \$default. Note the slash. Full documentation here.)
Set your Template Key. This is compared against the value selected by the Template Selection Expression. If it's a match, the template is used. (If you want to match all incoming requests, enter $default. Note the absence of a slash.)
Click your Template Key to open the template editor. This is where you enter your template that will be sent to your integration endpoint as the body of the request. For example, if you want to forward the connection ID and the incoming query parameters to the integration endpoint, you can use the following:
{
"myConnectionIdProperty": "$context.connectionId",
"myQueryParams": $input.params()
}
Documentation for variables available to you in the template expression can be found here.
(Note that while $request is a valid variable in the Template Selection Expression, it is not a valid variable in the template itself. Use $input instead there.)
Basically Template Selection Expression works same as Route Selection Expression. All examples for Route Selection Expression will work.
https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-websocket-api-selection-expressions.html#apigateway-websocket-api-route-selection-expressions
In addition to it, TemplateSelectionExpression for integration response supports few more variables:
$integration.response.statuscode
$integration.response.header.headerName
$integration.response.multivalueheader.headerName

JMeter reponse headers values before redirection on status code 302

I am performing load testing on an API using JMeter. For that, I call an oauth link, which returns a code in the headers which I use for further testing. But the link redirects to another link and I am unable to capture the value of the response headers when a response with status code 302 is returned. How can I do that.
If your situation is like this one:
You can still extract the dynamic value from the latter sample result by modifying Regular Expression Extractor scope
As per documentation:
Apply to:
This is for use with samplers that can generate sub-samples, e.g. HTTP Sampler with embedded resources, Mail Reader or samples generated by the Transaction Controller.
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 - assertion is to be applied to the contents of the named variable
By default Regular Expression Extractor is looking into Main sample only, in the above example it is HTTP Request, if the data you're looking for is stored in one of the sub-samples it is enough to change Regular Expression Extractor's scope to look into sub-results as well:
You have 2 options:
Do not allow HTTP request to redirect. Simply uncheck "Follow Redirects" checkbox in the HTTP Sampler:
That way you can process this request normally. The drawback is of course that you need to add a second request which will take you to a link to which you are normally redirected automatically.
Most post-processors allow you to extract value from either main sample, or sub-samples, or both. So follow redirect as before, but change Post-Processor to extract value from sub-sample. For example Regular Expression Extractor:

Fetch Javascript variable in source section using Jmeter

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.

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