Xbase++

Azure Storage: Lease Container

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to establishes a lock on a container for delete operations. The lock duration can be 15 to 60 seconds, or can be infinite. Xbase++

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

nSuccess := 0

//  Azure Blob Service Example: Lease Container
//  See also: https://msdn.microsoft.com/en-us/library/azure/jj159103.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 lease ID needs to be a GUID.  (UUID and GUID are synonymous)
oCrypt := CreateObject("Chilkat.Crypt2")
cGuid := oCrypt:GenerateUuid()
? "Lease ID: " + cGuid
nSuccess := oRest:AddHeader("x-ms-lease-id", cGuid)

//  The action can be "acquire", "renew", "change", "release", or "break".
//  See https://msdn.microsoft.com/en-us/library/azure/jj159103.aspx
nSuccess := oRest:AddHeader("x-ms-lease-action", "acquire")

//  The lease duration..
nSuccess := oRest:AddHeader("x-ms-lease-duration", "15")

//  In this example, we are acquiring a lease for the container named "mycontainer".
cResponseStr := oRest:FullRequestNoBody("PUT", "/mycontainer?restype=container&comp=lease")
IF (oRest:LastMethodSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    oAzAuth:destroy()
    oCrypt:destroy()
    RETURN
ENDIF

//  When successful, the Azure Storage service will respond with a 200, 201, or 202 response status code,
//  with no response body.

//  The status code depends on the operation:
//     Acquire: A successful operation returns status code 201 (Created).
//     Renew: A successful operation returns status code 200 (OK).
//     Change: A successful operation returns status code 200 (OK).
//     Release: A successful operation returns status code 200 (OK).
//     Break: A successful operation returns status code 202 (Accepted).

IF ((oRest:ResponseStatusCode < 200) .OR. (oRest:ResponseStatusCode > 202))
    //  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()
    oCrypt:destroy()
    RETURN
ENDIF

? "Success: Lease acquired."

oRest:destroy()
oAzAuth:destroy()
oCrypt:destroy()