The length of the URL for this request exceeds the configured maxUrlLength value. REST API

I was wondering if someone could help, or am I missing something. In the articles found here http://ift.tt/13IyE86

They refer to using the /getfilebyserverrelativeurl. When I build my request and try and make a HttpWebRequest I get

The length of the URL for this request exceeds the configured maxUrlLength value

in the webresponse.

I'm making these requests from a console application against Office 365/SharePoint Online.

The url length is is 305 in this test case.

This is the code I am using

            HttpWebRequest request = HttpWebRequest.Create(resourceUrl) as HttpWebRequest;
            request.Credentials = _credentials;
            request.CookieContainer = _cookieContainter;
            request.Headers.Add("X-RequestDigest", _formDigest);
            request.Method = "POST";
            request.Timeout = 3600000;
            request.Accept = "application/json; odata=verbose";
            request.ContentLength = incomingStream.Length;
            request.AllowWriteStreamBuffering = false;
            request.KeepAlive = false;

            using (var reqStream = request.GetRequestStream()) {
                incomingStream.CopyTo(reqStream);
            }

            WebResponse response = request.GetResponse();
            using (System.IO.StreamReader sr = new System.IO.StreamReader(response.GetResponseStream())) {
                result = sr.ReadToEnd();
            }

When its caught by the WebException and I read the exception response all I get is this "The length of the URL for this request exceeds the configured maxUrlLength value."

This is the resourceUrl:

http://ift.tt/13J0vVa('/personal/user_account_tenant_onmicrosoft_com/Documents/Test/7601.17514.101119-1850_x64fre_server_eval_en-us-GRMSXEVAL_EN_DVD.iso.001')/startupload(uploadId=guid'38acfb37-ccd5-4ac1-961d-090ce1ed9d6f')