Xbase++

Get Container Metadata

See more Azure Cloud Storage Examples

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

LOCAL nSuccess
LOCAL oRest
LOCAL nBTls
LOCAL nPort
LOCAL nBAutoReconnect
LOCAL oAzAuth
LOCAL cResponseStr

nSuccess := 0

//  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.

oRest := CreateObject("Chilkat.Rest")

//  Connect to the Azure Storage Blob Service
nBTls := 1
nPort := 443
nBAutoReconnect := 1
//  In this example, the storage account name is "chilkat".
nSuccess := oRest:Connect("chilkat.blob.core.windows.net", nPort, nBTls, nBAutoReconnect)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

//  Provide Azure Cloud credentials for the REST call.
oAzAuth := CreateObject("Chilkat.AuthAzureStorage")
oAzAuth:AccessKey := "AZURE_ACCESS_KEY"
//  The account name used here should match the 1st part of the domain passed in the call to Connect (above).
oAzAuth:Account := "chilkat"
oAzAuth:Scheme := "SharedKey"
oAzAuth:Service := "Blob"
//  This causes the "x-ms-version: 2021-08-06" header to be automatically added.
oAzAuth:XMsVersion := "2021-08-06"
nSuccess := oRest:SetAuthAzureStorage(oAzAuth)

//  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".
cResponseStr := oRest:FullRequestNoBody("GET", "/mycontainer?restype=container&comp=metadata")
IF (oRest:LastMethodSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    oAzAuth:destroy()
    RETURN
ENDIF

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

IF (oRest:ResponseStatusCode != 200)
    //  Examine the request/response to see what happened.
    ? "response status code = " + Str(oRest:ResponseStatusCode)
    ? "response status text = " + oRest:ResponseStatusText
    ? "response header: " + oRest:ResponseHeader
    ? "response body (if any): " + cResponseStr
    ? "---"
    ? "LastRequestStartLine: " + oRest:LastRequestStartLine
    ? "LastRequestHeader: " + oRest:LastRequestHeader
    oRest:destroy()
    oAzAuth:destroy()
    RETURN
ENDIF

//  The user-defined metadata is located in the response header.
//  The full response header can be obtained like this:
? "response header: " + oRest:ResponseHeader
? "--"

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

? "Success."

oRest:destroy()
oAzAuth:destroy()