Chunked Encoding Response Check (Chunk Response Handler)

Gatling (Open-Source)
1

Hello,

Running into a use case that I’m having a hard time finding info for. I’m currently interacting with a system that returns a chunked transfer response when a GET is performed:

  • Connected to localhost (::1) port 8080 (#0)

GET HTTP/1.1
Host: localhost:8080
User-Agent: curl/7.43.0
Accept: /

HTTP/1.1 200 OK
Content-Type: application/json
Content-Disposition: attachment; filename=json.json
Pragma: no-cache
Cache-Control: no-cache, no-store, must-revalidate, pre-check=0, post-check=0
Server:
Transfer-Encoding: chunked

Each chunk then contains a message that is being streamed. Gatling doesn’t currently seem to run checks until a response is fully received, which never happens since the connection is kept open for streaming. Is there something that I can do so that I can check the body as a chunk arrives?

Thanks

2

this is with the latest stable, 2.2.2

3

Well, we do support Server Sent Events, which looks VERY similar to what you’re doing.

4

Oh wow thanks, I didn’t realize that was the purpose. Let me try using that and get back to you on the result. Thanks again!

5

Beware that SSE chunks must comply with the spec.
If you’ve implemented your own custom protocol, you’ll be stuck. But then, the question would be: why not stick to a standard such as SSE or WebSocket?

6

It is a custom protocol, but it seems to be very close to the sse spec, I was able to parse messages with that. Json was broken due to not being in spec, but the raw regex worked great. Thanks for the help.