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Dropbox API - Downloading windows exe file

Anton U.

Well, I'm using .net version of Dropbox V2 API with Visual Basic 2015, and I'm trying with it to download an .exe file from my dropbox. So, I do this:

Dim response = Await dbx.files.BeginDownload(path + "/" + file)
filecontainer = Await response.GetContentAsStreamAsync()

Filecontainer is a string. After that, I try to write that string into a created .exe file, and then, that exe file is larger than original. I was thinking it was due to encoding, but it still doesn't work. So, test .exe file is about 940 kB, but a "copy" that's downloaded from dropbox is about 1.7 MB.

Am I doing something wrong or?

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Comments

Greg-DB

Does filecontainer have the length of data you expect? Can you share the rest of the relevant code?

Steve M.

filecontainer = Await response.GetContentAsStreamAsync()

"Filecontainer is a string."

This doesn't make sense. GetContentAsStreamAsync doesn't return a String. It returns a Stream.

You probably want code like this:

Dim response = Await dbx.files.BeginDownload(path + "/" + file)
Dim responseStream = Await response.GetContentAsStreamAsync()

Using localFileStream As File.Create("myfile.exe")
    responseStream.CopyTo(localFileStream)
End Using

Anton U.

@Gregory, no. It's bigger, mostly. Depends on encoding. If I use ASCII enconding, then it's smaller.

@Steve, thanks, your solution worked. Kinda. I'm a little bit rusty with VB, since I didn't use it for a long, long time. In fuction I did responsestream, and later, I had to return stream in class (form1), because file.create apparently doesn't work in async functions.

Below is entire code, so you can see what I did.

Imports System
Imports System.IO
Imports System.Text

Public Class Form1

Dim dropbox As New Dropbox.Api.DropboxClient("My token")
Dim responsestream As Stream

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

GetDbxUser()

GetExe("/my_path", "exefile.exe")

End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

Using stream = File.Create("exefile.exe")
responsestream.CopyTo(stream)
End Using

End Sub

' Dropbox Api functions

Public Async Function GetDbxUser() As Task
Dim user = Await dropbox.Users.GetCurrentAccountAsync()
'Just to check that it actually works
Label2.Text = "User set complete!"
Label3.Text = user.Email
End Function

Public Async Function GetExe(path As String, file As String) As Task
Dim response = Await dropbox.Files.DownloadAsync(path + "/" + file)
responsestream = Await response.GetContentAsStreamAsync()

End Function

End Class