Visual Basic 6.0

Download a Binary File into Memory

See more Azure Cloud Storage Examples

Downloads a binary file into memory. Visual Basic 6.0

Dim success As Long
success = 0

' Azure File Service Example: Download a Binary File to Memory
' See:  https://docs.microsoft.com/en-us/rest/api/storageservices/get-file

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

Dim rest As New ChilkatRest

' Connect to the Azure Storage Blob Service
Dim bTls As Long
bTls = 1
Dim port As Long
port = 443
Dim bAutoReconnect As Long
bAutoReconnect = 1
' In this example, the storage account name is "chilkat".
success = rest.Connect("chilkat.file.core.windows.net",port,bTls,bAutoReconnect)
If (success = 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

' Provide Azure Cloud credentials for the REST calls.
Dim azAuth As New ChilkatAuthAzureStorage
azAuth.AccessKey = "AZURE_ACCESS_KEY"
' The account name used here should match the 1st part of the domain passed in the call to Connect (above).
azAuth.Account = "chilkat"
azAuth.Scheme = "SharedKey"
azAuth.Service = "File"
' This causes the "x-ms-version: 2021-08-06" header to be automatically added.
azAuth.XMsVersion = "2021-08-06"
success = rest.SetAuthAzureStorage(azAuth)

' Note: The application does not need to explicitly set the following
' headers: x-ms-date, Authorization.  These headers
' are automatically set by Chilkat.

' Send a GET request to download the file "penguins.jpg" to a BinData object.
' (The share name is "pip")
Dim bdFileContents As New ChilkatBinData
success = rest.FullRequestNoBodyBd("GET","/pip/wildlife/antarctic/penguins.jpg",bdFileContents)
If (success = 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

' When successful, the response status will be 200.
' If a non-success status code is returned, then the bdFileContents actually contains the XML error message.
If (rest.ResponseStatusCode <> 200) Then
    ' Examine the request/response to see what happened.
    Debug.Print "response status code = " & rest.ResponseStatusCode
    Debug.Print "response status text = " & rest.ResponseStatusText
    Debug.Print "response header: " & rest.ResponseHeader
    Dim sbXmlErr As New ChilkatStringBuilder
    success = sbXmlErr.AppendBd(bdFileContents,"utf-8",0,0)
    Debug.Print "response body (if any): " & sbXmlErr.GetAsString()
    Debug.Print "---"
    Debug.Print "LastRequestStartLine: " & rest.LastRequestStartLine
    Debug.Print "LastRequestHeader: " & rest.LastRequestHeader
    Exit Sub
End If

Debug.Print "Size of the downloaded file = " & bdFileContents.NumBytes

' See the online reference documentation for the BinData class for ways
' to access the bytes.

success = bdFileContents.WriteFile("qa_output/penguins.jpg")