Flysystem by @frankdejonge

Flysystem is a filesystem abstraction which allows you to easily swap out a local filesystem for a remote one.

Flysystem on Packagist

Goals

• Have a generic API for handling common tasks across multiple file storage engines.
• Have consistent output which you can rely on.
• Integrate well with other packages/frameworks.
• Be cacheable.
• Emulate directories in systems that support none, like AwsS3.
• Support third party plugins.
• Make it easy to test your filesystem interactions.
• Support streams for bigger file handling

Installation

Through Composer, obviously:

{
    "require": {
        "league/flysystem": "0.2.*"
    }
}

You can also use Flysystem without using Composer by registing an autoloader function:

spl_autoload_register(function($class) {
    if (!substr($class, 0, 17) === 'League\\Flysystem') {
        return;
    }

    $location = __DIR__ . 'path/to/flysystem/src/' . str_replace('\\', '/', $class) . '.php';

    if (is_file($location)) {
        require_once($location);
    }
});

Adapters

• Local
• Amazon Web Services - S3
• Rackspace Cloud Files
• Dropbox
• Ftp
• Sftp (through phpseclib)
• Zip (through ZipArchive)
• WebDAV (through SabreDAV)

Planned Adapters

• Azure
• PR's welcome?

Caching

• Memory (array caching)
• Redis (through Predis)
• Memcached

Local Setup

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Local as Adapter;

$filesystem = new Filesystem(new Adapter(__DIR__.'/path/to/root'));

Zip Archive Setup

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Zip as Adapter;

$filesystem = new Filesystem(new Adapter(__DIR__.'/path/to/archive.zip'));

AWS S3 Setup

use Aws\S3\S3Client;
use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\AwsS3 as Adapter;

$client = S3Client::factory(array(
    'key'    => '[your key]',
    'secret' => '[your secret]',
));

$filesystem = new Filesystem(new Adapter($client, 'bucket-name', 'optional-prefix'));

Rackspace Setup

use OpenCloud\OpenStack;
use OpenCloud\Rackspace;
use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Rackspace as Adapter;

$client = new OpenStack(Rackspace::UK_IDENTITY_ENDPOINT, array(
    'username' => ':username',
    'password' => ':password',
));

$store = $client->objectStoreService('cloudFiles', 'LON');
$container = $store->getContainer('flysystem');

$filesystem = new Filesystem(new Adapter($container));

Dropbox Setup

use Dropbox\Client;
use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Dropbox as Adapter;

$client = new Client($token, $appName);
$filesystem = new Filesystem(new Adapter($client, 'optional/path/prefix'));

FTP Setup

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Ftp as Adapter;

$filesystem = new Filesystem(new Adapter(array(
    'host' => 'ftp.example.com',
    'username' => 'username',
    'password' => 'password',

    /** optional config settings */
    'port' => 21,
    'root' => '/path/to/root',
    'passive' => true,
    'ssl' => true,
    'timeout' => 30,
)));

SFTP Setup

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Sftp as Adapter;

$filesystem = new Filesystem(new Adapter(array(
    'host' => 'example.com',
    'port' => 21,
    'username' => 'username',
    'password' => 'password',
    'privateKey' => 'path/to/or/contents/of/privatekey',
    'root' => '/path/to/root',
    'timeout' => 10,
)));

WebDAV Setup

$client = new Sabre\DAV\Client($settings);
$adapter = new League\Flysystem\Adapter\WebDav($client);
$flysystem = new League\Flysystem\Filesystem($adapter);

Predis Caching Setup

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Local as Adapter;
use League\Flysystem\Cache\Predis as Cache;

$filesystem = new Filesystem(new Adapter(__DIR__.'/path/to/root'), new Cache);

// Or supply a client
$client = new Predis\Client;
$filesystem = new Filesystem(new Adapter(__DIR__.'/path/to/root'), new Cache($client));

Memcached Caching Setup

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter\Local as Adapter;
use League\Flysystem\Cache\Memcached as Cache;

$memcached = new Memcached;
$memcached->addServer('localhost', 11211);
$filesystem = new Filesystem(new Adapter(__DIR__.'/path/to/root'), new Cache($memcached, 'storageKey', 300));
// Storage Key and expire time are optional

General Usage

Write Files

$filesystem->write('filename.txt', 'contents');

Update Files

$filesystem->update('filename.txt', 'new contents');

Write or Update Files

$filesystem->put('filename.txt', 'contents');

Read Files

$contents = $filesystem->read('filename.txt');

Check if a file exists

$exists = $filesystem->has('filename.txt');

Delete Files

$filesystem->delete('filename.txt');

Rename Files

$filesystem->rename('filename.txt', 'newname.txt');

Get Mimetypes

$mimetype = $filesystem->getMimetype('filename.txt');

Get Timestamps

$timestamp = $filesystem->getTimestamp('filename.txt');

Get File Sizes

$size = $filesystem->getSize('filename.txt');

Create Directories

$filesystem->createDir('nested/directory');

Directories are also made implicitly when writing to a deeper path

$filesystem->write('path/to/filename.txt', 'contents');

Delete Directories

$filesystem->deleteDir('path/to/directory');

Manage Visibility

Visibility is the abstraction of file permissions across multiple platforms. Visibility can be either public or private.

use League\Flysystem\AdapterInterface;
$filesystem->write('db.backup', $backup, [
    'visibility' => AdapterInterface::VISIBILITY_PRIVATE),
]);
// or simply
$filesystem->write('db.backup', $backup, ['visibility' => 'private']);

You can also change and check visibility of existing files

if ($filesystem->getVisibility('secret.txt') === 'private') {
    $filesystem->setVisibility('secret.txt', 'public');
}

Global visibility setting

You can set the visibility as a default, which prevents you from setting it all over the place.

$filesystem = new League\Flysystem\Filesystem($adapter, $cache, [
    'visibility' => AdapterInterface::VISIBILITY_PRIVATE
]);

List Contents

$contents = $filemanager->listContents();

The result of a contents listing is a collection of arrays containing all the metadata the file manager knows at that time. By default a you'll receive path info and file type. Additional info could be supplied by default depending on the adapter used.

Example:

foreach ($contents as $object) {
    echo $object['basename'].' is located at'.$object['path'].' and is a '.$object['type'];
}

By default Flysystem lists the top directory non-recursively. You can supply a directory name and recursive boolean to get more precise results

$contents = $flysystem->listContents('some/dir', true);

List paths

$paths = $filemanager->listPaths();

foreach ($paths as $path) {
    echo $path;
}

List with ensured presence of specific metadata

$listing = $flysystem->listWith(['mimetype', 'size', 'timestamp'], 'optional/path/to/dir', true);

foreach ($listing as $object) {
    echo $object['path'].' has mimetype: '.$object['mimetype'];
}

Get file into with explicid metadata

$info = $flysystem->getWithMetadata('path/to/file.txt', ['timestamp', 'mimetype']);
echo $info['mimetype'];
echo $info['timestamp'];

Using streams for reads and writes

$stream = fopen('/path/to/database.backup', 'r+');
$flysystem->writeStream('backups/' . strftime('%G-%m-%d') . '.backup', $stream);

// Using write you can also directly set the visibility
$flysystem->writeStream('backups/' . strftime('%G-%m-%d') . '.backup', $stream, 'private');

// Or update a file with stream contents
$flysystem->updateStream('backups/' . strftime('%G-%m-%d') . '.backup', $stream);

// Retrieve a read-stream
$stream = $flysystem->readStream('something/is/here.ext');
$contents = stream_get_contents($stream);
fclose($stream);

// Create or overwrite using a stream.
$putStream = tmpfile();
fwrite($putStream, $contents);
rewind($putStream);
$filesystem->putStream('somewhere/here.txt', $putStream);
fclose($putStream);

S3 and writeStream

In order to get the correct mime type for the object, supply it like so:

$s3->writeStream('path/to/object.png', $stream, [
    'visibility' => 'public',
    'mimetype' => 'image/png',
]);

Plugins

Need a feature which is not included in Flysystem's bag of trick? Write a plugin!

use League\Flysystem\FilesystemInterface;
use League\Flysystem\PluginInterface;

class MaximusAwesomeness implements PluginInterface
{
    protected $filesystem;

    public function setFilesystem(FilesystemInterface $filesystem)
    {
        $this->filesystem = $filesystem;
    }

    public function getMethod()
    {
        return 'getDown';
    }

    public function handle($path = null)
    {
        $contents = $this->filesystem->read($path);

        return sha1($contents);
    }
}

Now we're ready to use the plugin

use League\Flysystem\Filesystem;
use League\Flysystem\Adapter;

$filesystem = new Filesystem(new Adapter\Local(__DIR__.'/path/to/files/'));
$filesystem->addPlugin(new MaximusAwesomeness);
$sha1 = $filesystem->getDown('path/to/file');

Mount Manager

Flysystem comes with an wrapper class to easilly work with multiple filesystem instances from a single object. The Flysystem\MountManager is an easy to use container allowing you do simplify complex cross-filesystem interactions.

Setting up a Mount Manager is easy:

$ftp = new League\Flysystem\Filesystem($ftpAdapter);
$s3 = new League\Flysystem\Filesystem($s3Adapter);
$local = new League\Flysystem\Filesystem($localAdapter);

// Add them in the constructor
$manager = new League\Flysystem\MountManager(array(
    'ftp' => $ftp,
    's3' => $s3,
));

// Or mount them later
$manager->mountFilesystem('local', $local);

Now we do all the file operations we'd normally do on a Flysystem\Filesystem instance.

// Read from FTP
$contents = $manager->read('ftp://some/file.txt');

// And write to local
$manager->write('local://put/it/here.txt', $contents);

This makes is easy to code up simple sync strategies.

$contents = $manager->listContents('local://uploads', true);

foreach ($contents as $entry) {
    $update = false;

    if ( ! $manager->has('storage://'.$entry['path'])) {
        $update = true;
    }

    elseif ($manager->getTimestamp('local://'.$entry['path']) > $manager->getTimestamp('storage://'.$entry['path'])) {
        $update = true;
    }

    if ($update) {
        $manager->put('storage://'.$entry['path'], $manager->read('local://'.$entry['path']));
    }
}

Enjoy.

Oh and if you've come down this far, you might as well follow me on twitter.