(Perl) Adding x-ms-range header to Azure Blob Download

See more Azure Cloud Storage Examples

Demonstrates how to add an x-ms-range header to an Azure blob download.

For more information, see https://docs.microsoft.com/en-us/rest/api/storageservices/get-blob

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$rest = chilkat::CkRest->new();

# Connect to the Azure Storage Blob Service
$bTls = 1;
$port = 443;
$bAutoReconnect = 1;
# In this example, the storage account name is "chilkat".
$success = $rest->Connect("chilkat.blob.core.windows.net",$port,$bTls,$bAutoReconnect);
if ($success != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

# Provide Azure Cloud credentials for the REST call.
$azAuth = chilkat::CkAuthAzureStorage->new();
$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: 2020-08-04" header to be automatically added.
$azAuth->put_XMsVersion("2020-08-04");
$success = $rest->SetAuthAzureStorage($azAuth);

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

# Add the x-ms-range header.
# See x-ms-range Header Format
# The file we're downloading contains "Hello World!", so we'll download just the "World!" part..
$rest->AddHeader("x-ms-range","bytes=6-");

# The Azure blob container is "test", the file is "helloWorld.txt"
$sb = chilkat::CkStringBuilder->new();
$success = $rest->FullRequestNoBodySb("GET","/test/helloWorld.txt",$sb);
if ($success == 0) {
    # Examine the request/response to see what happened.
    print "response status code = " . $rest->get_ResponseStatusCode() . "\r\n";
    print "response status text = " . $rest->responseStatusText() . "\r\n";
    print "response header: " . $rest->responseHeader() . "\r\n";
    print "---" . "\r\n";
    print "LastRequestStartLine: " . $rest->lastRequestStartLine() . "\r\n";
    print "LastRequestHeader: " . $rest->lastRequestHeader() . "\r\n";
    exit;
}

print $sb->getAsString() . "\r\n";

print "Success." . "\r\n";