[GenAI] Fix 11819: updating SimpleHttpRequest.updateCookies to remove existing cookie headers #12147
      
        
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Issue: #11819
Bug description
Calling MutableHttpRequest.cookie(s)is expected to keep a single Cookie header updated. However, multiple Cookie headers are created depending on the request implementation.Root cause & Fix
The test reproduces the problem for
SimpleHttpRequestby adding cookies, it expects exactly one Cookie header value with the latest value for duplicate names and correct semantics.On the original code,
SimpleHttpRequest.updateCookies used headers.add(...)per cookie, which produced multiple Cookie header entries (one per cookie), causing the test to fail.The patch fixes this by building a single combined Cookie header string (joined with "; ") and setting it once via
headers.set(...), thus preventing multiple header entries.Steps to reproduce
Please use this command to see the output from provided test: