How detect the server supported connection count

drjackool 956 Reputation points
2021-10-29T07:10:25.527+00:00

Hi
I have a downloader program in MFC/Win32 that downloads a file at multi-connection but on some sites when connection count is 8 the server returns 503 error but when I decrease connection count to 5 download works fine? Also I set INTERNET_OPTION_MAX_CONNS_PER_SERVER and 1_0 server value to 64 How to solve this problem? How detect the server supported connection count?
Thanks

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