On Tue, 18 Apr 2017, Greg Stewart via curl-library wrote:

> curl -F uri='' -F username=ubnt -F password=ubnt
> https://192.168.135.22/login.cgi -k --trace-ascii logfile.txt --cookie-jar
> cookies.txt --location

That looks fine. The clue here is:

> 0000: HTTP/1.1 417 Expectation Failed

This server seems to be a bit stupid so you probably need to disable the
Expect: header that the above command line sends by default. Add this:

  -H Expect:

... it makes curl disable the use of that header in the request.

-- 
  / daniel.haxx.se
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