如何使用 php 和 Amazon S3 sdk 下载文件？

Question

我正在尝试使我的脚本能够通过 php 在 Amazon S3 存储桶中显示 test.jpg。 这是我到目前为止所得到的：

require_once('library/AWS/sdk.class.php');

$s3 = new AmazonS3($key, $secret);

$objInfo = $s3->get_object_headers('my_bucket', 'test.jpg');
$obj = $s3->get_object('my_bucket', 'test.jpg', array('headers' => array('content-disposition' => $objInfo->header['_info']['content_type'])));

echo $obj->body;

这只是转储页面上的文件数据。我认为我还需要发送内容处置标头，我认为这是在 get_object() 方法中完成的，但事实并非如此。

注意：我使用的是此处提供的 SDK：http://aws.amazon.com/sdkforphp/

Answer 1

这两种方法都对我有用。第一种方式看起来更简洁。

    $command = $s3->getCommand('GetObject', array(
       'Bucket' => 'bucket_name',
       'Key'    => 'object_name_in_s3'  
       'ResponseContentDisposition' => 'attachment; filename="'.$my_file_name.'"'
    ));

    $signedUrl = $command->createPresignedUrl('+15 minutes');
    echo $signedUrl;
    header('Location: '.$signedUrl);
    die();

或者是更冗长但仍然实用的方式。

    $object = $s3->getObject(array(
    'Bucket' => 'bucket_name',
    'Key'    => 'object_name_in_s3'   
    ));

    header('Content-Description: File Transfer');
    //this assumes content type is set when uploading the file.
    header('Content-Type: ' . $object->ContentType);
    header('Content-Disposition: attachment; filename=' . $my_file_name);
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');

    //send file to browser for download. 
    echo $object->body;

Answer 2

在回显 $object 主体之前，通过回显内容类型标头来使其工作。

$objInfo = $s3->get_object_headers('my_bucket', 'test.jpg');
$obj = $s3->get_object('my_bucket', 'test.jpg');

header('Content-type: ' . $objInfo->header['_info']['content_type']);
echo $obj->body;

Answer 3

对于 PHP sdk3 更改 Maximus 答案的最后一行

    $object = $s3->getObject(array(
       'Bucket' => 'bucket_name',
       'Key'    => 'object_name_in_s3'   
    ));

    header('Content-Description: File Transfer');
    //this assumes content type is set when uploading the file.
    header('Content-Type: ' . $object->ContentType);
    header('Content-Disposition: attachment; filename=' . $my_file_name);
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');

    //send file to browser for download. 
    echo $object["Body"];

Answer 4

如果您仍在寻找 2019 年以后的相关答案，使用适用于 PHP 3.x 的 AWS SDK，特别是使用 Composer 的“2006-03-01”，以下内容对我有用

...

/**
 * Download a file
 * 
 * @param   string  $object_key
 * @param   string  $file_name
 * @return  void
 */
function download($object_key, $file_name = '') {
  if ( empty($file_name) ) {
    $file_name = basename($file_path);
  }
  $cmd = $s3->getCommand('GetObject', [
    'Bucket'                        => '<aws bucket name>',
    'Key'                           => $object_key,
    'ResponseContentDisposition'    => "attachment; filename=\"{$file_name}\"",
  ]);
  $signed_url = $s3->createPresignedRequest($cmd, '+15 minutes') // \GuzzleHttp\Psr7\Request
                ->getUri() // \GuzzleHttp\Psr7\Uri
                ->__toString();
  header("Location: {$signed_url}");
}
download('<object key here>', '<file name for download>');

注意：这是为那些想要的人提供的解决方案以避免使用来自 AWS 的直接下载链接通过其服务器代理下载可能出现的问题。

Answer 5

我将 Content-Disposition 标头添加到 getAuthenticatedUrl();

 // Example
 $timeOut = 3600; // in seconds
 $videoName = "whateveryoulike";
 $headers = array("response-content-disposition"=>"attachment");
 $downloadURL = $s3->getAuthenticatedUrl( FBM_S3_BUCKET, $videoName, FBM_S3_LIFETIME + $timeOut, true, true, $headers );

Answer 6

此脚本下载 S3 服务（例如 Amazon S3 或 DigitalOcean 空间）上所有目录中的所有文件。

1. 配置您的凭据（请参阅类常量和类下的代码）
2. 运行 composer require aws/aws-sdk-php
3. 假设您将此脚本保存到 index.php，然后运行 ​​php index.php在控制台中运行 php 并让它撕裂！

请注意，我只是编写代码来完成工作，这样我就可以关闭我的 DO 帐户。它可以满足我的需要，但我可以进行一些改进以使其更具可扩展性。享受！

---

<?php

require 'vendor/autoload.php';
use Aws\S3\S3Client;

class DOSpaces {

    // Find them at https://cloud.digitalocean.com/account/api/tokens
    const CREDENTIALS_API_KEY           = '';
    const CREDENTIALS_API_KEY_SECRET    = '';

    const CREDENTIALS_ENDPOINT          = 'https://nyc3.digitaloceanspaces.com';
    const CREDENTIALS_REGION            = 'us-east-1';
    const CREDENTIALS_BUCKET            = 'my-bucket-name';

    private $client = null;

    public function __construct(array $args = []) {

        $config = array_merge([
            'version' => 'latest',
            'region'  => static::CREDENTIALS_REGION,
            'endpoint' => static::CREDENTIALS_ENDPOINT,
            'credentials' => [
                'key'    => static::CREDENTIALS_API_KEY,
                'secret' => static::CREDENTIALS_API_KEY_SECRET,
            ],
        ], $args);

        $this->client = new S3Client($config);
    }

    public function download($destinationRoot) {
        $objects = $this->client->listObjectsV2([
            'Bucket' => static::CREDENTIALS_BUCKET,
        ]);

        foreach ($objects['Contents'] as $obj){

            echo "DOWNLOADING " . $obj['Key'] . "\n";
            $result = $this->client->getObject([
                'Bucket' => 'dragon-cloud-assets',
                'Key' => $obj['Key'],
            ]);

            $this->handleObject($destinationRoot . $obj['Key'], $result['Body']);

        }
    }

    private function handleObject($name, $data) {
        $this->ensureDirExists($name);

        if (substr($name, -1, 1) !== '/') {
            echo "CREATING " . $name . "\n";
            file_put_contents($name, $data);
        }
    }

    private function ensureDirExists($name) {
        $dir = $name;
        if (substr($name, -1, 1) !== '/') {
            $parts = explode('/', $name);
            array_pop($parts);
            $dir = implode('/', $parts);
        }

        @mkdir($dir, 0777, true);
    }

}

$doSpaces = new DOSpaces([
    'endpoint' => 'https://nyc2.digitaloceanspaces.com',
    'credentials' => [
        'key'    => '12345',
        'secret' => '54321',
    ],
]);
$doSpaces->download('/home/myusername/Downloads/directoryhere/');