On Sat, 16 Feb 2008, Dan Fandrich wrote:

> If the server sends a 417 error code, curl ought to resend the request
> without the 100-continue header. If it's not doing this, curl ought to be
> fixed.

I'm not so sure. The 417 code means that "Expectation Failed" which I
interpret that the server deemed that something in the request made it not
allowed to continue, so just removing the Expect: header and doing the request
again would thus just get a failure again although a bit later in the process
than with the header present.

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