PHP Extension

Azure Storage: CORS Preflight Blob Request

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to send a CORS pre-flight blob request. PHP Extension

<?php

include("chilkat.php");

$success = false;

// Azure Blob Service Example: CORS Preflight Blob Request
// See also: https://msdn.microsoft.com/en-us/library/azure/dn535599.aspx

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

$rest = new CkRest();

// Connect to the Azure Storage Blob Service
$bTls = true;
$port = 443;
$bAutoReconnect = true;
// In this example, the storage account name is "chilkat".
$success = $rest->Connect('chilkat.blob.core.windows.net',$port,$bTls,$bAutoReconnect);
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

// Provide Azure Cloud credentials for the REST call.
$azAuth = new CkAuthAzureStorage();
$azAuth->put_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->put_Account('chilkat');
$azAuth->put_Scheme('SharedKey');
$azAuth->put_Service('Blob');
// This causes the "x-ms-version: 2021-08-06" header to be automatically added.
$azAuth->put_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 preflight blob request requires the following two HTTP headers.
// The Origin is the domain from which the actual request will be issued.
$success = $rest->AddHeader('Origin','www.contoso.com');
// The Access-Control-Request-Method is the HTTP method (such as GET, POST, PUT, etc.) of the actual request.
$success = $rest->AddHeader('Access-Control-Request-Method','PUT');

// The expected response is a 202 response status code with no response body.
// The name of the container or blob resource in this example is "test". (Replace "test" with your container name.)
$responseStr = $rest->fullRequestNoBody('OPTIONS','/test');
if ($rest->get_LastMethodSuccess() != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

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

// If CORS is not enabled or no matching rule is found for the request, 
// then a 403 status code is returned, with the following status text:
// "CORS not enabled or no matching rule found for this request."
if ($rest->get_ResponseStatusCode() != 200) {
    // Examine the request/response to see what happened.
    print 'response status code = ' . $rest->get_ResponseStatusCode() . "\n";
    print 'response status text = ' . $rest->responseStatusText() . "\n";
    print 'response header: ' . $rest->responseHeader() . "\n";
    print 'response body (if any): ' . $responseStr . "\n";
    print '---' . "\n";
    print 'LastRequestStartLine: ' . $rest->lastRequestStartLine() . "\n";
    print 'LastRequestHeader: ' . $rest->lastRequestHeader() . "\n";
    exit;
}

print 'Success: Preflight Blob Request is accepted.' . "\n";

?>