Chilkat Examples

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(Xojo Plugin) 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.

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//  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 Chilkat.Rest

//  Connect to the Azure Storage Blob Service
Dim bTls As Boolean
bTls = True
Dim port As Int32
port = 443
Dim bAutoReconnect As Boolean
bAutoReconnect = True
//  In this example, the storage account name is "chilkat".
Dim success As Boolean
success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
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 Chilkat.StringBuilder
success = sbToken.LoadFile("qa_data/tokens/azureStorageAccountSas.txt","utf-8")
If (success <> True) Then
    System.DebugLog("Failed to load SAS token.")
    Return
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 Chilkat.BinData
success = binData.LoadFile("qa_data/jpg/starfish.jpg")
If (success <> True) Then
    System.DebugLog("Failed to load JPG file.")
    Return
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 Chilkat.StringBuilder
success = rest.FullRequestBd("PUT","/mycontainer/starfish.jpg",binData,sbResponse)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
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.
    System.DebugLog("response status code = " + Str(rest.ResponseStatusCode))
    System.DebugLog("response status text = " + rest.ResponseStatusText)
    System.DebugLog("response header: " + rest.ResponseHeader)
    System.DebugLog("response body (if any): " + sbResponse.GetAsString())
    System.DebugLog("---")
    System.DebugLog("LastRequestStartLine: " + rest.LastRequestStartLine)
    System.DebugLog("LastRequestHeader: " + rest.LastRequestHeader)
    System.DebugLog("Failed.")
    Return
End If

System.DebugLog("Success.")

 

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