(VB.NET) SharePoint -- Update the Contents of a File (PUT)

Demonstrates how to update the contents of a SharePoint file.

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'  This requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim http As New Chilkat.Http

'  If SharePoint Windows classic authentication is used, then set the
'  Login, Password, LoginDomain, and NtlmAuth properties.
http.Login = "SHAREPOINT_USERNAME"
http.Password = "SHAREPOINT_PASSWORD"
http.LoginDomain = "SHAREPOINT_NTLM_DOMAIN"
http.NtlmAuth = True

'  The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
'  If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
'  establish the cookie as shown at SharePoint Online Authentication


'  Indicate that we want a JSON reply
http.Accept = "application/json;odata=verbose"

'  Update /Documents/ChilkatTest/sample.docx with new content...
Dim req As New Chilkat.HttpRequest
req.HttpVerb = "POST"
req.Path = "/_api/web/GetFileByServerRelativeUrl('/Documents/ChilkatTest/sample.docx')/$value"
'  Give the location of the file to be uploaded.
'  Note: The file is not loaded into memory at this point.  It is never fully loaded
'  into memory.  Instead, the file data is streamed directly from the file when
'  when the upload occurs.
req.StreamBodyFromFile("qa_data/msword/sample.docx")

'  We need to add a form digest value in the X-RequestDigest header field.
'  See this example for details on
'  how to get (and cache) a form digest value
req.AddHeader("X-RequestDigest","SHAREPOINT_FORM_DIGEST")

'  Also need to add this header..
req.AddHeader("X-HTTP-Method","PUT")

'  Upload..
Dim bUseTls As Boolean = True
Dim resp As Chilkat.HttpResponse = http.SynchronousRequest("SHAREPOINT_HTTPS_DOMAIN",443,bUseTls,req)
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


'  A successful update will return a 204 status code with an empty body.
'  A non-successful update will return a JSON response body..
If (resp.StatusCode <> 204) Then
    Debug.WriteLine("Response status code = " & resp.StatusCode)
    Dim json As New Chilkat.JsonObject
    json.Load(resp.BodyStr)
    json.EmitCompact = False
    Debug.WriteLine(json.Emit())
    Debug.WriteLine("Failed")

    Exit Sub
End If




Debug.WriteLine("Success.")