Chilkat Examples

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Visual Basic 6.0 Examples

ASN.1
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(Visual Basic 6.0) Upload using Azure Storage Account Shared Access Signature (SAS) Authorization

Sample code to upload binary bytes to a block blob in Azure Cloud Storage using an Azure Storage Account Shared Access Signature (SAS) Authorization. This creates a block blob, or replaces an existing block blob.

Note: The maximum size of a block blob created by uploading in a single step is 64MB. For larger files, the upload must be broken up into blocks. There is another Chilkat example for that..

Note: This example requires Chilkat v9.5.0.65 or later.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

'  Note: This example requires Chilkat v9.5.0.65 or greater.

'  Azure Blob Service Example: Upload binary bytes to a block blob.
'  This uses a Shared Access Signature (SAS) for Authorization.
'  This creates a new block blob or replaces an existing one in its entirety.
'  See also: https://msdn.microsoft.com/en-us/library/azure/dd179451.aspx

'  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".
Dim success As Long
success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect)
If (success <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

'  ----------------------------------------------------------------------------------------------
'  The code above this comment could be placed inside a function/subroutine within the application
'  because the connection does not need to be made for every request.  Once the connection is made
'  the app may send many requests..
'  ----------------------------------------------------------------------------------------------

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

'  Let's load a previously computed Azure Storage Account SAS token and use it.
'  See How to Create an Azure Storage Account Shared Access Signature
Dim sbToken As New ChilkatStringBuilder
success = sbToken.LoadFile("qa_data/tokens/azureStorageAccountSas.txt","utf-8")
If (success <> 1) Then
    Debug.Print "Failed to load SAS token."
    Exit Sub
End If

'  Add the Shared Access Signature query params for authorization.
success = rest.AddQueryParams(sbToken.GetAsString())

'  IMPORTANT: Make sure to set the x-ms-blob-type header:
success = rest.AddHeader("x-ms-blob-type","BlockBlob")

'  IMPORTANT: Make sure to add the x-ms-date header.
'  When the header name is "x-ms-date", Chilkat will recognize the keyword "NOW"
'  and will substitute the current system date/time formatted as required by Microsoft.
success = rest.AddHeader("x-ms-date","NOW")

'  For this example, we'll just load a JPG file into memory..
Dim binData As New ChilkatBinData
success = binData.LoadFile("qa_data/jpg/starfish.jpg")
If (success <> 1) Then
    Debug.Print "Failed to load JPG file."
    Exit Sub
End If

' Note: The maximum size of a block blob created by uploading in a single step is 64MB.
' For larger files, the upload must be broken up into blocks.  There is another Chilkat example for that..
Dim sbResponse As New ChilkatStringBuilder
success = rest.FullRequestBd("PUT","/mycontainer/starfish.jpg",binData,sbResponse)
If (success <> 1) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

'  When successful, the Azure Storage service will respond with a 201 response status code,
'  with no response body.
If (rest.ResponseStatusCode <> 201) 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
    Debug.Print "response body (if any): " & sbResponse.GetAsString()
    Debug.Print "---"
    Debug.Print "LastRequestStartLine: " & rest.LastRequestStartLine
    Debug.Print "LastRequestHeader: " & rest.LastRequestHeader
    Debug.Print "Failed."
    Exit Sub
End If

Debug.Print "Success."

 

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