[GH-ISSUE #511] [BUG] Proxyman interferes with WebSocket upgrade request & causes race condition #509

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opened 2026-03-03 19:51:02 +03:00 by kerem · 0 comments

kerem commented

2026-03-03 19:51:02 +03:00

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Originally created by @NghiaTranUIT on GitHub (Jun 24, 2025).
Original GitHub issue: https://github.com/ProxymanApp/proxyman-windows-linux/issues/511

Originally assigned to: @kics223w1 on GitHub.

Description

Implement this: https://github.com/ProxymanApp/Proxyman/issues/2283#issuecomment-2974841778

Why didn't Proxyman work?

Old Proxyman version doesn't handle if the server sent the first message -> Can't make a websocket ❌

How to reproduce

Register free account in https://app.ringcentral.com/
intercept this websocket
Make sure the websocket is working (Confirm with Network Tab in Google Chrome and Proxyman)

Criteria

Investigate if it happened on Windows, if yes, fix it

Originally created by @NghiaTranUIT on GitHub (Jun 24, 2025). Original GitHub issue: https://github.com/ProxymanApp/proxyman-windows-linux/issues/511 Originally assigned to: @kics223w1 on GitHub. ## Description Implement this: https://github.com/ProxymanApp/Proxyman/issues/2283#issuecomment-2974841778 ## Why didn't Proxyman work? Old Proxyman version doesn't handle if the server sent the first message -> Can't make a websocket ❌ ### How to reproduce 1. Register free account in https://app.ringcentral.com/ 2. intercept this websocket 3. Make sure the websocket is working (Confirm with Network Tab in Google Chrome and Proxyman) ## Criteria - [ ] Investigate if it happened on Windows, if yes, fix it