Monday, December 14, 2015

Microsoft KB 3109103 Breaks WebSockets

Recently my gulp live reload broke like so:

ws://x.x.x.x:8080/LiveReload' failed: Error during WebSocket handshake: Unexpected response code: 200

Even though nothing changed, I noted patches had been installed over the weekend.  After looking through which files were updated, I noticed that KB 3109103 patched Wshrm.dll.  I was unable to find much useful information on this DLL, but after looking into the description it appeared to have a lot to do with sockets:  Windows Sockets Helper DLL for PGM.

After removing the update & rebooting my web sockets started working again.

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