View source for Handling HTTP code 417: Expectation failed

Some HTTP libraries automatically add a header named Expect and fill it with '100-continue'.  If your program is getting the HTTP status code 417 you will need to disable the header using your language's library.


'''.NET'''

The ServicePointManager has a property named Expect100Continue. Set this to false.
<pre>System.Net.ServicePointManager.Expect100Continue = false;</pre>


'''PHP'''

If you're using PHP's curl, manually empty the Expect header.
<pre>curl_setopt($ch, CURLOPT_HTTPHEADER, array('Expect:'));</pre>