(Perl) OneDrive -- List Large Directory

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Demonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children.

Note: This example requires Chilkat v9.5.0.97 or greater.

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.

# This example uses the OAuth client credentials flow.
# See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

# Use your client ID, client secret, and tenant ID in the following lines
$json = chilkat::CkJsonObject->new();
$json->UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743");
$json->UpdateString("client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH");
$json->UpdateString("scope","https://graph.microsoft.com/.default");
$json->UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token");

$http = chilkat::CkHttp->new();
$http->put_AuthToken($json->emit());

# This example will get the DriveItems in /lots-of-files, which has 450 children..
$http->SetUrlVar("item_path","/lots-of-files");
$http->SetUrlVar("user_id","4fe732c3-322e-4a6b-b729-2fd1eb5c6104");

$json->put_EmitCompact(0);

# This loop will download DriveItems in sets of 25 until no more exist.
$bGetMore = 1;
# (Add the $top query parameter to define the page size, i.e. the max number of results to return).
$nextLink = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:{$item_path}:/children?$top=25";

while (($bGetMore == 1)) {

    # Get the next chunk of DriveItems
    $resp = $http->quickGetStr($nextLink);
    if ($http->get_LastMethodSuccess() != 1) {
        print $http->lastErrorText() . "\r\n";
        exit;
    }

    # The response should be JSON.
    $json->Load($resp);

    # A successful response should return a status code of 200.
    if ($http->get_LastStatus() != 200) {
        print $json->emit() . "\r\n";
        print "Response status = " . $http->get_LastStatus() . "\r\n";
        exit;
    }

    # Iterate over the DriveItems in the JSON response:
    $i = 0;
    $numItems = $json->SizeOfArray("value");
    while ($i < $numItems) {
        $json->put_I($i);
        print "name: " . $json->stringOf("value[i].name") . "\r\n";
        $i = $i + 1;
    }

    # If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems.
    # Otherwise, exit the loop.
    if ($json->HasMember('\'@odata.nextLink\'') == 1) {
        $nextLink = $json->stringOf('\'@odata.nextLink\'');
        print "nextLink: " . $nextLink . "\r\n";
    }
    else {
        $bGetMore = 0;
    }

}