(Xojo Plugin) Get Container Metadata

Azure Storage Blob Service REST API: Sample code to get the user-defined metadata of a container.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// Azure Blob Service Example: Get Container User-Defined Metadata
// See also: https://msdn.microsoft.com/en-us/library/azure/ee691976.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

// Provide Azure Cloud credentials for the REST call.
Dim azAuth As New Chilkat.AuthAzureStorage
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 = "Blob"
// 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.

// The expected success response is a 200 response status code with no response body.
// In this example, we are getting the metadata of the container named "mycontainer".
Dim responseStr As String
responseStr = rest.FullRequestNoBody("GET","/mycontainer?restype=container&comp=metadata")
If (rest.LastMethodSuccess <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// When successful, the Azure Storage service will respond with a 200 response status code,
// with no response body.

If (rest.ResponseStatusCode <> 200) 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): " + responseStr)
    System.DebugLog("---")
    System.DebugLog("LastRequestStartLine: " + rest.LastRequestStartLine)
    System.DebugLog("LastRequestHeader: " + rest.LastRequestHeader)
    Return
End If

// The user-defined metadata is located in the response header.
// The full response header can be obtained like this:
System.DebugLog("response header: " + rest.ResponseHeader)
System.DebugLog("--")

// Metadata headers begin with "x-ms-meta-"
// Individual response header fields can be retrieved like this:
System.DebugLog("x-ms-meta-Category: " + rest.ResponseHdrByName("x-ms-meta-Category"))
System.DebugLog("x-ms-meta-Resolution: " + rest.ResponseHdrByName("x-ms-meta-Resolution"))

System.DebugLog("Success.")