Difference between revisions of "Handling HTTP code 417: Expectation failed"
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Latest revision as of 11:02, 15 June 2010
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.
System.Net.ServicePointManager.Expect100Continue = false;
PHP
If you're using PHP's curl, manually empty the Expect header.
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Expect:'));
