Skip to main content

JMeter CSS/JQuery Extractor Example

Since version 2.9, JMeter has provided an option to extract value using CSS/JQuery Extractor post-processor. This is quite useful as now it would be possible to get the value of elements using CSS and JQuery expressions. In this article, we will explore how JMeter CSS/JQuery Extractor post-processor can be used to fetch values from web page response.
Google home page is taken as reference for this example. We have recorded a step which will fetch Google home page as response. We will try to extract value of search field’s ‘autocomplete’ parameter using CSS/JQuery Extractor. Follow below steps to perform this task.
  1. Add CSS/JQuery Extractor post-processor under the recorded Google home page’s request.
  2. Add Debug Sampler and View Result Tree listener under thread group. Your script should look as below after performing these 2 steps.
  1. Run the script for getting response of Google home page.
  2. For Google search field, JMeter receives below code in View Result Tree listener’s response data. We want to fetch value of ‘autocomplete’ parameter.
  3. Now, select CSS/JQuery Extractor from the script. We need to provide values in various fields displayed over here. Refer below step for possible values. Fore detailed info about these parameters, checkout JMeter official documentation.
  4. Reference name can be provided with any name. We need to enter CSS expression for the search field, ‘input[name=q]’ in our case. Since we need to get value of ‘autocomplete’ parameter, we will provide it in Attribute section. We have entered 1 as Match number since we need to get the value of 1st matching data. At last, we have provided ‘NotFound’ as default value which will be passed to next request if JMeter was unable to find any value. Your JMeter CSS/JQuery Extractor should resemble below image after providing all these values.

  1. Run the test and verify in View Result Tree listener that the reference name variable is having value fetched from CSS/JQuery Extractor.
We hope the above article would be helpful in giving basic JMeter CSS/JQuery Extractor overview. Share with us your further learning in comments below.
Labels:

Comments

Post a Comment

Popular posts from this blog

JMeter Exceeded Maximum Number of Redirects Error Solution

While running performance test, JMeter allows maximum 5 redirects by default. However, if your system demands more than 5 redirects, it may result in JMeter exceeded maximum number of redirects error. In this post, we have listed down steps to overcome this error. Actual error in JMeter: Response code: “Non HTTP response code: java.io.IOException” Response message: “Non HTTP response message: Exceeded maximum number of redirects: 5” This error is noticed because  JMeter  allows maximum 5 redirects by default and your system may be using more than 5 redirects. You need to increase this count to more than 5 in jmeter.properties file. Follow below steps to achieve this. Navigate to /bin directory of your JMeter installation. Locate jmeter.properties file and open it in any editor. Search for “httpsampler.max_redirects” property in opened file. Uncomment the above property by removing # before it. Change to value to more than 5 Eg. 20. Save the file and restart JMeter. If
Post a Comment
Read more

SSO with SAML login scenario in JMeter

SAML(Security Assertion Markup Language) is increasingly being used to perform single sign-on(SSO) operations. As WikiPedia puts it, SAML is an XML-based open standard data format for exchanging authentication and authorization data between parties, in particular, between an identity provider and a service provider. With the rise in use of SAML in web applications, we may need to handle this in JMeter. This step-by-step tutorial shows SAML JMeter scenario to perform login operation. First request from JMeter is a GET request to fetch Login page. We need to fetch two values ‘SAMLRequest’ and ‘RelayState’ from the Login page response data. We can do this by using  Regular Expression Extractor . These two values need to be sent in POST request to service provider. Refer below image to see how to do this. We will get an HTML login page as a response to the request sent in 1st step. We need to fetch values of some hidden elements to pass it in the next request. We can do this b
Post a Comment
Read more

A Tutorial to Send Email using JMeter

Sending email is a mundane activity in any professional’s life. It’s a common medium for communication nowadays. Therefore performance testing of email server is not only important but necessary for an organization. JMeter can be helpful to perform load testing in such scenarios. In this tutorial, we will see how JMeter can be used to send email. We will use SMTP Sampler of JMeter to send an email. JavaMail API is needed to enable email functionality in JMeter. Download it from  here  and paste the jar in JMeter’s lib folder. Now, perform below steps to configure SMTP Sampler. Add a new Thread Group under Test Plan. Right click on Thread Group and select Add–>Sampler–>SMTP Sampler. We need to populate SMTP server’s details in this sampler. We will use GMail for sending an email. For this, enter these values in SMTP Sampler fields. Server: smtp.googlemail.com, Port: 587. Provide values in Email Address From and To fields of Mail Settings section to specify sender and reci
Post a Comment
Read more