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Forum Discussion
lakshmak
9 years agoHelpful | Level 5
Upload Async doesn't work when uploading a file to server
Hello ,
I'm trying to upload a file to dropbox using UploadAsunc method . Everything works fine in the local system. But when i tried to publish and run from the server I'm having an exception or file doesn't get uploaded into the dropbox. Without the dropbox call everything works fine . Here is the code i'm trying to call when uplaoding it.
Try Using handler As HttpClientHandler = New HttpClientHandler() Using httpclient As HttpClient = New HttpClient(handler) 'httpclient.Timeout = TimeSpan.FromMinutes(20) Dim _DropboxClient = New DropboxClient(ApiKeyDropBox, config) Dim resultstring As String = UploadToDB(_DropboxClient, dropboxdir, docName, fileBytes) _DropboxClient.Dispose() If Not resultstring = "RanToCompletion" Then ErrorMsg &= "The following error occured: " & resultstring End If End Using End Using Catch ex2 As Dropbox.Api.AuthException ErrorMsg &= "Error details: " & ex2.Message.ToString() Catch ex As HttpException ErrorMsg &= "Error occured saving file to dropbox.<br /> Error Message: " & ex.InnerException.Message End Try
Private Function UploadToDB(_DropboxClient As DropboxClient, Directory As String, Filename As String, Content As [Byte]()) As String Try Dim result As String = "Unknown" Dim trycnt As String = 0 Dim tryLimit As String = 20 Dim respnse As Task(Of FileMetadata) Using _mStream = New MemoryStream(Content) respnse = _DropboxClient.Files.UploadAsync(Convert.ToString(Directory & Convert.ToString("/")) & Filename, WriteMode.Overwrite.Instance, body:=_mStream) While Not respnse.IsCompleted And trycnt < tryLimit Threading.Thread.Sleep(1000) trycnt += 1 result = respnse.Status.ToString() End While UploadToDB = result End Using Catch ex2 As Dropbox.Api.HttpException UploadToDB = ex2.Message.ToString() End Try End Function
Can you please say anything that I am doing worng or what is causing the problem.
This is the exception thrown : The type initializer for 'Dropbox.Api.DropboxRequestHandlerOptions' threw an exception.
Sometimes this is the exception i get: Could not load type 'System.Security.Authentication.SslProtocols' from assembly 'System.Net.Primitives, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
- Dropbox does use SSL/TLS for all API calls, so your system needs to be able to make SSL/TLS connections. Based on the error message, it seems something went wrong loading System.Security.Authentication.SslProtocols. That seems to be a issue with your system itself though, not Dropbox, so I'm afraid I can't offer much insight. This question may be better suited for a Microsoft support channel or forum.
- Thank you
- Greg-DB
Dropbox Staff
Dropbox does use SSL/TLS for all API calls, so your system needs to be able to make SSL/TLS connections. Based on the error message, it seems something went wrong loading System.Security.Authentication.SslProtocols. That seems to be a issue with your system itself though, not Dropbox, so I'm afraid I can't offer much insight. This question may be better suited for a Microsoft support channel or forum.- lakshmakHelpful | Level 5Thank you
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