I was wondering if someone could help, or am I missing something. In the articles found here http://msdn.microsoft.com/en-us/library/office/dn450841(v=office.15).aspx#bk_FileStartUpload

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()) {

            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:


  • 1
    Is your entire request URL longer than 2000 characters? – John-M Dec 19 '14 at 15:13
  • Can you provide the code you are using? – wjervis Dec 19 '14 at 15:20
  • Added more details to question. – Webfort Dec 20 '14 at 16:39

Instead of


you can use

GetFileById or GetFolderById

To upload a new file, you can use the below url


Reference: http://msdn.microsoft.com/en-us/library/office/dn450841%28v=office.15%29.aspx

  • I've tried that. I've used that for other calls. Trying to get the file start upload to work which is the link in the question. Thanks – Webfort Dec 26 '14 at 11:30

In case it helps, we had a similar (but not exact-same) situation. The URL parameters are not included in the length-restriction (at least not this restriction), so we changed our URL to be like so (to edit the original example) :


That appears to be working as expected.

Be aware of the 260 char max path limitation in general, though. If you try and add a file[name] to a folder and that total length exceeds the limit, you have a different problem with a known SP limitation.

Best of luck!


  • 3
    +1 for this answer - should be the marked answer. – thastark Apr 11 '16 at 16:39
  • This is brilliant. – vinod Aug 18 '16 at 22:55
  • Really awesome tricky logic you posted, many thanks to you – Jayakumar Kulkarni Feb 1 '17 at 7:00
  • Works with minimal changes to original code, nice! – Cardin Aug 30 '19 at 1:39
  • you dah man user5346346436 – Nicholas DiPiazza Mar 3 at 3:44

Change the method from "GET" to "POST" and that will resolve the URL length issue.

  • In this case it needs to be a post. – Webfort Dec 20 '14 at 16:40
  • then you have to include the urls in the body of the request not on the url itself. – Burre Ifort Mar 17 '20 at 14:34

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