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(Visual FoxPro) Azure Storage: Upload Binary Data to Block Blob using BinData

Sample code to upload binary bytes (contained in a Chilkat BinData object) to a block blob in Azure Cloud Storage. This creates the 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..

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loRest
LOCAL lnBTls
LOCAL lnPort
LOCAL lnBAutoReconnect
LOCAL lnSuccess
LOCAL loAzAuth
LOCAL loBd
LOCAL loSbResponseBody

* Azure Blob Service Example: Upload binary bytes to a block blob.
* 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.

loRest = CreateObject('Chilkat_9_5_0.Rest')

* Connect to the Azure Storage Blob Service
lnBTls = 1
lnPort = 443
lnBAutoReconnect = 1
* In this example, the storage account name is "chilkat".
lnSuccess = loRest.Connect("chilkat.blob.core.windows.net",lnPort,lnBTls,lnBAutoReconnect)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    CANCEL
ENDIF

* Provide Azure Cloud credentials for the REST call.
loAzAuth = CreateObject('Chilkat_9_5_0.AuthAzureStorage')
loAzAuth.AccessKey = "AZURE_ACCESS_KEY"
* The account name used here should match the 1st part of the domain passed in the call to Connect (above).
loAzAuth.Account = "chilkat"
loAzAuth.Scheme = "SharedKey"
loAzAuth.Service = "Blob"
* This causes the "x-ms-version: 2020-08-04" header to be automatically added.
loAzAuth.XMsVersion = "2020-08-04"
lnSuccess = loRest.SetAuthAzureStorage(loAzAuth)

* 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.

* IMPORTANT: Make sure to set the x-ms-blob-type header:
lnSuccess = loRest.AddHeader("x-ms-blob-type","BlockBlob")

* For this example, we'll just load a JPG file into memory..
loBd = CreateObject('Chilkat_9_5_0.BinData')
lnSuccess = loBd.LoadFile("qa_data/jpg/starfish.jpg")
IF (lnSuccess = 0) THEN
    ? "Failed to load the file to be uploaded."
    RELEASE loRest
    RELEASE loAzAuth
    RELEASE loBd
    CANCEL
ENDIF

* 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..
loSbResponseBody = CreateObject('Chilkat_9_5_0.StringBuilder')
lnSuccess = loRest.FullRequestBd("PUT","/mycontainer/starfish.jpg",loBd,loSbResponseBody)
IF (lnSuccess = 0) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loAzAuth
    RELEASE loBd
    RELEASE loSbResponseBody
    CANCEL
ENDIF

* When successful, the Azure Storage service will respond with a 201 response status code,
* with no response body.

IF (loRest.ResponseStatusCode <> 201) THEN
    * Examine the request/response to see what happened.
    ? "response status code = " + STR(loRest.ResponseStatusCode)
    ? "response status text = " + loRest.ResponseStatusText
    ? "response header: " + loRest.ResponseHeader
    ? "response body (if any): " + loSbResponseBody.GetAsString()
    ? "---"
    ? "LastRequestStartLine: " + loRest.LastRequestStartLine
    ? "LastRequestHeader: " + loRest.LastRequestHeader
    RELEASE loRest
    RELEASE loAzAuth
    RELEASE loBd
    RELEASE loSbResponseBody
    CANCEL
ENDIF

? "Success."

RELEASE loRest
RELEASE loAzAuth
RELEASE loBd
RELEASE loSbResponseBody


 

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