(PHP ActiveX) Download Binary File to In-Memory Bytes

This example demonstrates how to download the binary content of a file from Google Drive directly into local memory.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

$success = 1;

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

// This example uses a previously obtained access token having permission for the 
// Google Drive scope.

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.AuthGoogle')
$gAuth = new COM("Chilkat.AuthGoogle");
$gAuth->AccessToken = 'GOOGLE-DRIVE-ACCESS-TOKEN';

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rest')
$rest = new COM("Chilkat.Rest");

// Connect using TLS.
// A single REST object, once connected, can be used for many Google Drive REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
$bAutoReconnect = 1;
$success = $rest->Connect('www.googleapis.com',443,1,$bAutoReconnect);

// Provide the authentication credentials (i.e. the access token)
$rest->SetAuthGoogle($gAuth);

// ------------------------------------------------------------------------------
// To download a file, we must know the file ID.
// In a previous example (see Build Local Metadata Cache
// we built a local cache to make it easy to lookup file IDs given a file path.
// Let's say we want to download "testFolder/abc/123/penguins.jpg".
// First we lookup the fileId in the cache.  With the fileId, we can download the file.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cache')
$gdCache = new COM("Chilkat.Cache");
$gdCache->Level = 0;
$gdCache->AddRoot('C:/ckCache/googleDrive');

$fileId = $gdCache->fetchText('testFolder/abc/123/penguins.jpg');
if ($gdCache->LastMethodSuccess != 1) {
    print 'Filepath not found in cache.' . "\n";
    exit;
}

// We need to send a GET request like this:
// GET https://www.googleapis.com/drive/v3/files/fileId?alt=media
// The fileId is part of the path.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbPath = new COM("Chilkat.StringBuilder");
$sbPath->Append('/drive/v3/files/');
$sbPath->Append($fileId);
$rest->AddQueryParam('alt','media');

// To download to memory, we'll send the request in one call, then receive
// the response header, and then the response body.
// If the response header indicates failure or an unexpected response, then the
// body is not the data we desire.

// First send the HTTP request.
$success = $rest->SendReqNoBody('GET',$sbPath->getAsString());
if ($success != 1) {
    print $rest->LastErrorText . "\n";
    exit;
}

// Get the response header.
$statusCode = $rest->ReadResponseHeader();
if ($statusCode != 200) {
    print 'response status code = ' . $rest->ResponseStatusCode . "\n";
    print 'response status text = ' . $rest->ResponseStatusText . "\n";
    print 'response header: ' . $rest->ResponseHeader . "\n";

    // Read the response body (which should be error text or HTML)
    $errResponseBody = $rest->readRespBodyString();
    if ($rest->LastMethodSuccess == 1) {
        print 'response body: ' . $errResponseBody . "\n";
    }

    exit;
}

// Read the response body, which should contain the file data.

$jpgBytes = $rest->ReadRespBodyBinary();
if ($rest->LastMethodSuccess != 1) {
    print $rest->LastErrorText . "\n";
    exit;
}

// Save jpgBytes to a file so we can examine the file to verify that it worked.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess')
$fac = new COM("Chilkat.FileAccess");
$fac->WriteEntireFile('qa_output/penguins_out.jpg',$jpgBytes);

print 'File downloaded.' . "\n";

?>