Visual FoxPro

Azure Blob Service - List all Containers in a Storage Account

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Azure Storage Blob Service REST API: Lists all the containers in a storage account. Visual FoxPro

LOCAL lnSuccess
LOCAL loRest
LOCAL lnBTls
LOCAL lnPort
LOCAL lnBAutoReconnect
LOCAL loAzAuth
LOCAL lcResponseStr
LOCAL loXml
LOCAL lnNumContainers
LOCAL i
LOCAL lcLastModDateStr
LOCAL loDateTime
LOCAL lcLeaseState

lnSuccess = 0

* Azure Blob Service Example: List all of the containers in an account.

* This example requires the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

loRest = CreateObject('Chilkat.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.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: 2021-08-06" header to be automatically added.
loAzAuth.XMsVersion = "2021-08-06"
lnSuccess = loRest.SetAuthAzureStorage(loAzAuth)

* URI parameters, such as "maxresults", are added by calling AddQueryParam
lnSuccess = loRest.AddQueryParam("maxresults","1000")

* Note: The application does not need to explicitly set the following
* headers: x-ms-date, Authorization.  These headers
* are automatically set by Chilkat.

lcResponseStr = loRest.FullRequestNoBody("GET","/?comp=list")
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loAzAuth
    CANCEL
ENDIF

* When successful, the Azure Storage service will respond with a 200 response code,
* with an XML body.  
IF (loRest.ResponseStatusCode <> 200) 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): " + lcResponseStr
    ? "---"
    ? "LastRequestStartLine: " + loRest.LastRequestStartLine
    ? "LastRequestHeader: " + loRest.LastRequestHeader
    RELEASE loRest
    RELEASE loAzAuth
    CANCEL
ENDIF

* Load the XML response for parsing.
* A sample XML response containing 2 containers is shown below.
loXml = CreateObject('Chilkat.Xml')
lnSuccess = loXml.LoadXml(lcResponseStr)

? loXml.GetXml()

* Iterate over the containers, listing some information about each.
lnSuccess = loXml.FindChild2("Containers")
lnNumContainers = loXml.NumChildren
i = 0
DO WHILE (i < lnNumContainers)
    lnSuccess = loXml.GetChild2(i)
    ? "Container Name: " + loXml.GetChildContent("Name")
    lcLastModDateStr = loXml.ChilkatPath("Properties|Last-Modified|*")
    ? "Last Modified: " + lcLastModDateStr
    * The date/time string can be loaded into a CkDateTime object for conversion to other date formats..
    loDateTime = CreateObject('Chilkat.CkDateTime')
    lnSuccess = loDateTime.SetFromRfc822(lcLastModDateStr)

    lcLeaseState = loXml.ChilkatPath("Properties|LeaseState|*")
    ? "Lease State: " + lcLeaseState

    lnSuccess = loXml.GetParent2()
    i = i + 1
ENDDO
lnSuccess = loXml.GetParent2()

* Sample XML response:

* 	<?xml version="1.0" encoding="utf-8" ?>
* 	<EnumerationResults ServiceEndpoint="https://chilkat.blob.core.windows.net/">
* 	    <MaxResults>1000</MaxResults>
* 	    <Containers>
* 	        <Container>
* 	            <Name>test</Name>
* 	            <Properties>
* 	                <Last-Modified>Wed, 20 Apr 2016 01:02:25 GMT</Last-Modified>
* 	                <Etag>"0x8D368B77024C583"</Etag>
* 	                <LeaseStatus>unlocked</LeaseStatus>
* 	                <LeaseState>available</LeaseState>
* 	            </Properties>
* 	        </Container>
* 	        <Container>
* 	            <Name>test2</Name>
* 	            <Properties>
* 	                <Last-Modified>Tue, 03 May 2016 17:13:01 GMT</Last-Modified>
* 	                <Etag>"0x8D373762EB6AC85"</Etag>
* 	                <LeaseStatus>unlocked</LeaseStatus>
* 	                <LeaseState>available</LeaseState>
* 	            </Properties>
* 	        </Container>
* 	    </Containers>
* 	    <NextMarker />
* 	</EnumerationResults>

RELEASE loRest
RELEASE loAzAuth
RELEASE loXml
RELEASE loDateTime