How to retrieve cookie value from Request Header

Gatling (Open-Source)
1

I want to fetch value of ai_user and ai_session for Cookie from the request headers using gatling . how can I do it ?

Response Header:
Content-Type:application/json; charset=utf-8
Set-Cookie:sails.sid=s%3AIK92bHjEZgMlyQZWRCmscom_4xPHR7Fh.mbGwJuOOCLxlIrK%2F%2BKceTCVrtUIys281u1UfyCsM9Uo;

Request Header:
Cookie:
ai_user=omW3hhzaEIm3mX3tYBHBtI|2024-02-29T17:36:37.457Z; ai_session=WjpOcSFqzDEZhXnQRb3Knt|1709228197472|1709228197472; referrer=“/authlogin”; sails.sid=s%3AIK92bHjEZgMlyQZWRCmscom_4xPHR7Fh.mbGwJuOOCLxlIrK%2F%2BKceTCVrtUIys281u1UfyCsM9Uo

ai_user and ai_session is only present in Request Header. sails.sid is present in Response header which I am able to fetch. But I am unable to get ai_user and ai_session as this is only part of request header.

Code:
private val login = scenario(“Login Scenario”)
.exec(
http(“Login”)
.post(“path”)
.body(RawFileBody(“0003_request.json”))
)

Screenshots:

image
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2

maybe Gatling HTTP protocol reference - helpers is what you need

1 Like
3

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image783×321 24.3 KB

I tried with the below code but getting error . Actually these cookies (ai_session, ai_user, user) are part of Request header and is not available in Response header. Unable to track these cookies using gatling. Please help

Code
getCookieValue(CookieKey(“ai_session”)
.withDomain(“domain_name”)
.withPath(“/”)
.withSecure(true)
.saveAs(“ai_session_key”)

Error

[ERROR] i.g.h.a.c.GetCookieBuilder$$anon$1 - ‘getCookie-4’ failed to execute: No Cookie matching parameters domain=domain_name, path=/, name=ai_session, secure=true

4

Cookies don’t come from a request.
They either come from a response (set-cookie header) or are manually added in JavaScript in the front-end layer.

You must figure out how they are populated in your application.
getCookieValue will only let you fetch a cookie from the cookie jar after it was populated, either from the response of a previous request, or because it was manually added with addCookie.

5

Thanks for your response. I am able to set cookie now in Cookie jar and the same cookie is passed in subsequent request. But now I am getting http error code 400.

6

Do you know what 400 status code means?

7

The HyperText Transfer Protocol (HTTP) 400 Bad Request response status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (for example, malformed request syntax

8

I have cross checked my request body which is taking json. I dont see any issue in that. The same body params are working fine in Jmeter.

9

The request is not only the body, it’s also the headers!

  • make sure you’re running on Gatling 3.10.4
  • check your request HTTP headers
10

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