本文介绍如何管理文件元信息。

文件元信息（Object Meta）详情请参见开发指南中的文件元信息。

设置文件元信息

以下代码用于设置文件元信息：

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}

use OSS\OssClient;
use OSS\Core\OssException;

// 阿里云主账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM账号进行API访问或日常运维，请登录 https://ram.console.aliyun.com 创建RAM账号。
$accessKeyId = "<yourAccessKeyId>";
$accessKeySecret = "<yourAccessKeySecret>";
// Endpoint以杭州为例，其它Region请按实际情况填写。
$endpoint = "http://oss-cn-hangzhou.aliyuncs.com";
$bucket= "<yourBucketName>";
$object = "<yourObjectName>";
$content = file_get_contents(__FILE__);
$options = array(
    OssClient::OSS_HEADERS => array(
        'Expires' => '2012-10-01 08:00:00',
        'Content-Disposition' => 'attachment; filename="xxxxxx"',
        'x-oss-meta-self-define-title' => 'user define meta info',
    ));
try{
    $ossClient = new OssClient($accessKeyId, $accessKeySecret, $endpoint);

    $ossClient->putObject($bucket, $object, $content, $options);
} catch(OssException $e) {
    printf(__FUNCTION__ . ": FAILED\n");
    printf($e->getMessage() . "\n");
    return;
}
print(__FUNCTION__ . ": OK" . "\n");

修改文件元信息

以下代码用于修改文件元信息：

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}

use OSS\OssClient;
use OSS\Core\OssException;

/// 阿里云主账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM账号进行API访问或日常运维，请登录 https://ram.console.aliyun.com 创建RAM账号。
$accessKeyId = "<yourAccessKeyId>";
$accessKeySecret = "<yourAccessKeySecret>";
// Endpoint以杭州为例，其它Region请按实际情况填写。
$endpoint = "http://oss-cn-hangzhou.aliyuncs.com";
$fromBucket = "<yourFromBucketName>";
$fromObject = "<yourFromObjectName>";
$toBucket = "<yourToBucketName>";
$toObject = "<yourToObjectName>";
$copyOptions = array(
    OssClient::OSS_HEADERS => array(
        'Expires' => '2018-10-01 08:00:00',
        'Content-Disposition' => 'attachment; filename="xxxxxx"',
        'x-oss-meta-location' => 'location',
    ),
);
try{
    $ossClient = new OssClient($accessKeyId, $accessKeySecret, $endpoint);

    $ossClient->copyObject($fromBucket, $fromObject, $toBucket, $toObject, $copyOptions);
} catch(OssException $e) {
    printf(__FUNCTION__ . ": FAILED\n");
    printf($e->getMessage() . "\n");
    return;
}
print(__FUNCTION__ . ": OK" . "\n");

获取文件元信息

以下代码用于获取文件元信息：

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}

use OSS\OssClient;
use OSS\Core\OssException;

// 阿里云主账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM账号进行API访问或日常运维，请登录 https://ram.console.aliyun.com 创建RAM账号。
$accessKeyId = "<yourAccessKeyId>";
$accessKeySecret = "<yourAccessKeySecret>";
// Endpoint以杭州为例，其它Region请按实际情况填写。
$endpoint = "http://oss-cn-hangzhou.aliyuncs.com";
$bucket= "<yourBucketName>";
$object = "<yourObjectName>";
try {
    $ossClient = new OssClient($accessKeyId, $accessKeySecret, $endpoint);

    $objectMeta = $ossClient->getObjectMeta($bucket, $object);
} catch (OssException $e) {
    printf(__FUNCTION__ . ": FAILED\n");
    printf($e->getMessage() . "\n");
    return;
}
print(__FUNCTION__ . ": OK" . "\n");
if (isset($objectMeta[strtolower('Content-Disposition')]) &&
    'attachment; filename="xxxxxx"' === $objectMeta[strtolower('Content-Disposition')]
) {
    print(__FUNCTION__ . ": ObjectMeta checked OK" . "\n");
} else {
    print(__FUNCTION__ . ": ObjectMeta checked FAILED" . "\n");
}