how to http sample reuse in jmeter? - jmeter

When using jmeter for interface testing, I want to reuse a certain httpsample. For example, there are 3 http requests, the first http request needs to be sent before the third http request is sent, which is equivalent to initialization, but I don’t want to add an http sampler before the third http request, which will cause http requests Redundant and difficult to maintain. what should I do? Does anyone know?

Put your "fist http request" under the Test Fragment
Reference it where required using the Module Controller
This way you can avoid code duplication and have only one instance of the "first" http request sampler across your test plan

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Jmeter parametirisation of SAML Request, Response and Relay State

In JMeter HTTP Samplers I have to parameterize the HTTP Sampler containing parameters for SAML Request, SAML Response and Relay State but I don't know how to do it.
In addition to your credentials you need to send the aforementioned parameters. The parameters can be found in responses for the previous requests.
You need to extract them from the previous responses using suitable JMeter Post-Processors and save into JMeter Variables
While sending the next request you need to add the variables from the previous step.
The process is known as correlation and there is a lot of information regarding it in the Internet, i.e. How to Load Test SAML SSO Secured Websites with JMeter

performance testing using jmeter cross checking the response with web data does not match

I have a web service URL:
https://app.snapmed.no/landing-page?flow=chat
The response code is 200 and the response body does not contain any valid data to cross-check with the webpage response or data in chrome It is completely dynamic. Now I do not know a enter image description hereway to add response assertion for this type of response. can someone help me?
Actually you don't have to use assertions, as per Reducing resource requirements chapter of JMeter Best Practices
Use as few Assertions as possible
JMeter automatically checks HTTP Response status codes and marks the HTTP Request sampler as failed if response code is 400 or higher.
If you want to add an extra layer of check you can explicitly validate that the page returns the HTTP Status Code 200 as follows:
also as far as I can see the web page always contains Send bilder til hudlege text so you can validate it as well:
More information: How to Use JMeter Assertions in Three Easy Steps

Possible if want to do API Load Testing using JMeter with URI info only?

My team planned to do API Performance Testing using JMeter 5.0 for my client. My client developed the API in Kubernetes. Just wondering, they gave info such as URI, HTTP Method and Content-Type only. We never have experience using URI. Are these info sufficient to do load test in JMeter? And where do I fill in these info? Is it in Config Element: HTTP Header Manager?
Because usually I only do my enablement using sample website which already provide the URL.
Do I need to ask them to provide the specific URL for this? Or URL can be extracted from URI?
Thanks.
Normally you should put:
Protocol, server name or IP and Port Number into HTTP Request Defaults, this way you will have a single configuration element having these details and in case of change you will need to introduce the change at one place only and won't have to revisit each and every HTTP Request sampler
Individual requests are defined using individual HTTP Request samplers where you need to provide URL Path and request body (if any)
Content-Type and other Headers can be provided via HTTP Header Manager, the same Scoping Rules as for HTTP Request Defaults apply, for example if you want to send application/json for all the requests just add HTTP Header Manager on the top of your Test Plan and it will add the header to all HTTP Request samplers which are at the same level as the HTTP Header Manager or lower.

Response Data for "GET Method"

I am creating different HTTP Requests for a site and taking an access token as a variable from Regular Expression Extractor and using it in another HTTP Request.
The Thread group is working fine; i.e. no error in View Results Tree. But Response data is only coming for the Request with POST Method. Nothing is coming for the Request with GET Method and both requests are taking the access token properly.
In some cases you may get response code 200 ok and request still may fail. In case of your get request that seems to be happening.
Check following:
Headers being sent with get request. (Compare request being sent from JMeter and from real browser.)
Add response assertion to get request to be assure the correctness of the response. (Check what response you get for the request made from browser.)
Make sure you have added cookie manager in the test plan.

Jmeter - how to pass a csrfmiddlewaretoken to a http request without getting 403 or Forbidden issues?

Can you explain how to construct a relevant HTTP Header or HTTP Request parameter holding CSRF value when an HTTP request has to be passed with a csrfmiddlewaretoken in Jmeter ?
CSRF protection can be handled just like any other dynamic mandatory request parameter or field, the right term to perform search on in performance testing world is Correlation
Check out How to Load Test CSRF-Protected Web Sites guide, it looks like to be exactly what you're looking for.
Try to implement correlation, after you have recorded the script. This is useful to pass dynamic values between different requests.
http://apache-jmeter.blogspot.com/2011/12/correlation-regular-expression.html
http://www.youtube.com/watch?v=j8bBiCeQ88w
If you have already implemented correlation and you are still getting errors, then you should bypass the token generation by writing code in Beanshell sampler to generate csrfmiddlewaretoken and then pass it to the next HTTP request (as per requirement).
hope this will help.

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