Writing a local file from an external FTP server - Issue with Varien_Io_File

Question

I have a script that pulls a file from an external server, and tries to save it locally (to then be processed). I'm using Varien_Io_Ftp() to facilitate this, however, upon saving the file locally, it throws the following exception, despite creating the file that is required which upsets me.

Warning: chdir(): Invalid argument (errno 22)  in C:\wamp\www\xxxxx\shop\lib\Varien\Io\File.php on line 547

This line in Varien_Io_File is the only one in the vacinity that doesn't have error suppression added to it. Is this a bug, or should I be setting _iwd somewhere within my call?

Hopefully some code to explain the call below:

$importDir = Mage::getBaseDir() . DS . 'var' . DS . 'import' . DS . 'stock' . DS;
$localFile = $importDir . "StockUpdate_" . date("Y-m-d-H-i-s") . ".csv";

$file = new Varien_Io_File();
$file->mkdir($importDir);
$pickupFile = new Varien_Io_Ftp();

try {
    $pickupFile->open(
        array(
            'host'      => $host,
            'user'      => $username,
            'password'  => $password,
            'timeout'   => '10'
        )
    );

    $pickupFile->cd($remoteDir);
    $_fileToImportRemoteTmp = $pickupFile->read($remoteFile);
    $pickupFile->close();

    if (!$file->write($localFile, $_fileToImportRemoteTmp)) {
        die("cannot write local file :/");
    }
    $file->close();

} catch (Exception $e) {
    var_dump($e);
}

The exception I being thrown with this line:

if (!$file->write($localFile, $_fileToImportRemoteTmp)) {

Answer 1

For anyone looking at this in the future, RS has provided an example that works, but I wanted to jump in and give a little explanation about WHY his solution works.

The exception being thrown at lib\Varien\Io\File.php on line 547 is due to the reference to $this->_iwd not being supressed (and inherently, the fact that it isn't set). I'm assuming this isn't a bug, despite the fact tht you can clearly call the function directly. I'm guessing that the intention is that you call the ->open() function prior to making any action upon a file.

The open() function sets a reference to _iwd (if you pass a path into it to begin with). i.e.

$file->open(array('path' => $importDir));

Grabbing a reference to Varien_Io_File, and making a direct call to cd, whilst possible, doesn't follow the correct flow, therefore when you write, the original reference to _iwd isn't in place.

It's worth pointing out that you need to call:

$file->mkdir($importDir);

prior to calling open().

Additionally, RS noted that http://inchoo.net/magento/magento-code-library/ has an example, however, the inital code doesn't mention the limitation above and actually calls ->write() directly too.

Answer 2

Try

$importDir = Mage::getBaseDir() . DS . 'var' . DS . 'import' . DS . 'stock' . DS;
$localFile = $importDir . "StockUpdate_" . date("Y-m-d-H-i-s") . ".csv";

$file = new Varien_Io_File();
$file->open(array('path' => $importDir)); 
$file->mkdir($importDir);

$pickupFile = new Varien_Io_Ftp();

try {
    $pickupFile->open(
        array(
            'host'      => $host,
            'user'      => $username,
            'password'  => $password,
            'timeout'   => '10'
        )
    );

    $pickupFile->cd($remoteDir);
    $_fileToImportRemoteTmp = $pickupFile->read($remoteFile);
    $pickupFile->close();

    if (!$file->write($localFile, $_fileToImportRemoteTmp)) {
        die("cannot write local file :/");
    }
    $file->close();

} catch (Exception $e) {
    var_dump($e);
}

Answer 3

Try

$pickupFile = new Varien_Io_Ftp();

$localDir = "/path/to/local/dir";
$remoteFile = "/path/to/remote/dir/text.csv"

mkdir($localDir, 0700, true);


$localFile = $localDir . '/local.csv'
try {
    $pickupFile->open(
        array(
            'host'      => $host,
            'user'      => $username,
            'password'  => $password,
            'timeout'   => '10'
        )
    );

    $pickupFile->read($remoteFile, $localFile);


} catch (Exception $e) {
    var_dump($e);
}

See Varien_Io_Ftp

Also for security you way want to use Varien_Io_Sftp