檔案系統 / 雲端儲存

簡介
設定檔
基本用法
Custom Filesystems

簡介

Laravel 有很棒的檔案系統抽象層，是基於 Frank de Jonge 的 Flysystem 套件。 Laravel 整合的 Flysystem 提供了簡單的介面，可以操作本地端空間、 Amazon S3 、 Rackspace Cloud Storage 。更好的是，它可以非常簡單的切換不同儲存方式，但仍使用相同的 API 操作！

設定檔

檔案系統的設定檔放在 config/filesystems.php 。在這個檔案內你可以設定所有的「硬碟」。每個硬碟代表一種儲存方式和地點。預設的設定檔內已經包含了所有儲存方式的範例。所以只要修改儲存設定和認證即可！

在使用 S3 或 Rackspace 之前，你必須先用 Composer 安裝相對應的套件：

Amazon S3: league/flysystem-aws-s3-v2 ~1.0
Rackspace: league/flysystem-rackspace ~1.0

當然，你可以加入任意數量的硬碟設定檔，甚至設定多個硬碟都使用同一種儲存方式。

使用本地端空間時，要注意所有的操作路徑都是相對於設定檔裡 local 的 root ，預設的路徑是 storage/app 。因此下列的操作將會儲存一個檔案在 storage/app/file.txt ：

Storage::disk('local')->put('file.txt', 'Contents');

基本用法

可以用 Storage facade 操作所有寫在設定檔裡的硬碟。或者是，你也可以將 Illuminate\Contracts\Filesystem\Factory 型別暗示寫到任何類別裡，經由 IoC container 解析。

取得一個特定硬碟

$disk = Storage::disk('s3');

$disk = Storage::disk('local');

確認檔案是否存在

$exists = Storage::disk('s3')->exists('file.jpg');

使用預設硬碟呼叫方法

if (Storage::exists('file.jpg'))
{
    //
}

取得檔案內容

$contents = Storage::get('file.jpg');

設定檔案內容

Storage::put('file.jpg', $contents);

附加內容到檔案結尾

Storage::prepend('file.log', 'Prepended Text');

加入內容到檔案開頭

Storage::append('file.log', 'Appended Text');

刪除檔案

Storage::delete('file.jpg');

Storage::delete(['file1.jpg', 'file2.jpg']);

複製檔案到新的路徑

Storage::copy('old/file1.jpg', 'new/file1.jpg');

移動檔案到新的路徑

Storage::move('old/file1.jpg', 'new/file1.jpg');

取得檔案大小

$size = Storage::size('file1.jpg');

取得最近修改時間 (UNIX)

$time = Storage::lastModified('file1.jpg');

取得目錄下所有檔案

$files = Storage::files($directory);

// Recursive...
$files = Storage::allFiles($directory);

$directories = Storage::directories($directory);

// Recursive...
$directories = Storage::allDirectories($directory);

建立目錄

Storage::makeDirectory($directory);

刪除目錄

Storage::deleteDirectory($directory);

Custom Filesystems

Laravel's Flysystem integration provides drivers for several "drivers" out of the box; however, Flysystem is not limited to these and has adapters for many other storage systems. You can create a custom driver if you want to use one of these additional adapters in your Laravel application. Don't worry, it's not too hard!

In order to set up the custom filesystem you will need to create a service provider such as DropboxFilesystemServiceProvider. In the provider's boot method, you can inject an instance of the Illuminate\Contracts\Filesystem\Factory contract and call the extend method of the injected instance. Alternatively, you may use the Disk facade's extend method.

The first argument of the extend method is the name of the driver and the second is a Closure that receives the $app and $config variables. The resolver Closure must return an instance of League\Flysystem\Filesystem.

Note: The $config variable will already contain the values defined in config/filesystems.php for the specified disk.

Dropbox Example

<?php namespace App\Providers;

use Storage;
use League\Flysystem\Filesystem;
use Dropbox\Client as DropboxClient;
use League\Flysystem\Dropbox\DropboxAdapter;
use Illuminate\Support\ServiceProvider;

class DropboxFilesystemServiceProvider extends ServiceProvider {

    public function boot()
    {
        Storage::extend('dropbox', function($app, $config)
        {
            $client = new DropboxClient($config['accessToken'], $config['clientIdentifier']);

            return new Filesystem(new DropboxAdapter($client));
        });
    }

    public function register()
    {
        //
    }

}