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# 使用 CloudFront API 和 适用于 PHP 的 AWS SDK 版本 3 来管理 Amazon CloudFront 分配
<a name="cloudfront-example-distribution"></a>

Amazon CloudFront 将内容缓存在全球边缘站点中，以加快您存储在自己的服务器或 Amazon 服务（如 Amazon S3 和 Amazon EC2）上的静态和动态文件的分配速度。当用户从您的网站请求内容时，CloudFront 将从最近的边缘站点提供内容（如果文件已在该处缓存）。否则，CloudFront 将检索文件的副本，处理副本，然后将其缓存以供下一个请求使用。在边缘站点缓存内容将减少该区域中类似用户请求的延迟。

对于您创建的每个 CloudFront 分配，指定内容所在的位置以及如何在用户发出请求时分配内容。本主题重点介绍静态和动态文件（如 HTML、CSS、JSON 和图像文件）的分配。有关结合使用 CloudFront 与视频点播的信息，请参阅[使用 CloudFront 的视频点播和实时流视频](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/on-demand-streaming-video.html)。

以下示例演示如何：
+ 使用 [CreateDistribution](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-cloudfront-2018-11-05.html#createdistribution) 创建分配。
+ 使用 [GetDistribution](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-cloudfront-2018-11-05.html#getdistribution) 获取分配。
+ 使用 [ListDistributions](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-cloudfront-2018-11-05.html#listdistributions) 列出分配。
+ 使用 [UpdateDistributions](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-cloudfront-2018-11-05.html#updatedistribution) 更新分配。
+ 使用 [DisableDistribution](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-cloudfront-2018-11-05.html#disabledistribution) 禁用分配。
+ 使用 [DeleteDistributions](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-cloudfront-2018-11-05.html#deletedistribution) 删除分配。

适用于 PHP 的 AWS SDKGitHub[ 上提供了](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/php/example_code)的所有示例代码。

## 凭证
<a name="examplecredentials"></a>

运行示例代码之前，请配置您的 AWS 凭证，如 [AWS 使用 适用于 PHP 的 AWS SDK 版本 3 进行身份验证](credentials.md) 中所述。然后导入 适用于 PHP 的 AWS SDK，如 [安装 适用于 PHP 的 AWS SDK 版本 3](getting-started_installation.md) 中所述。

有关使用 Amazon CloudFront 的更多信息，请参阅 [Amazon CloudFront 开发人员指南](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/)。

## 创建 CloudFront 分配。
<a name="create-a-cf-distribution"></a>

从 Amazon S3 桶创建分配。在以下示例中，已注释掉可选参数，但显示默认值。要向您的分配添加自定义项，请取消注释 `$distribution` 内的值和参数。

要创建 CloudFront 分配，请使用 [CreateDistribution](https://docs.aws.amazon.com/cloudfront/latest/APIReference/API_CreateDistribution.html) 操作。

 **导入**。

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
```

 **示例代码** 

```
function createS3Distribution($cloudFrontClient, $distribution)
{
    try {
        $result = $cloudFrontClient->createDistribution([
            'DistributionConfig' => $distribution
        ]);

        $message = '';

        if (isset($result['Distribution']['Id'])) {
            $message = 'Distribution created with the ID of ' .
                $result['Distribution']['Id'];
        }

        $message .= ' and an effective URI of ' .
            $result['@metadata']['effectiveUri'] . '.';

        return $message;
    } catch (AwsException $e) {
        return 'Error: ' . $e['message'];
    }
}

function createsTheS3Distribution()
{
    $originName = 'my-unique-origin-name';
    $s3BucketURL = 'amzn-s3-demo-bucket.s3.amazonaws.com';
    $callerReference = 'my-unique-caller-reference';
    $comment = 'my-comment-about-this-distribution';
    $defaultCacheBehavior = [
        'AllowedMethods' => [
            'CachedMethods' => [
                'Items' => ['HEAD', 'GET'],
                'Quantity' => 2
            ],
            'Items' => ['HEAD', 'GET'],
            'Quantity' => 2
        ],
        'Compress' => false,
        'DefaultTTL' => 0,
        'FieldLevelEncryptionId' => '',
        'ForwardedValues' => [
            'Cookies' => [
                'Forward' => 'none'
            ],
            'Headers' => [
                'Quantity' => 0
            ],
            'QueryString' => false,
            'QueryStringCacheKeys' => [
                'Quantity' => 0
            ]
        ],
        'LambdaFunctionAssociations' => ['Quantity' => 0],
        'MaxTTL' => 0,
        'MinTTL' => 0,
        'SmoothStreaming' => false,
        'TargetOriginId' => $originName,
        'TrustedSigners' => [
            'Enabled' => false,
            'Quantity' => 0
        ],
        'ViewerProtocolPolicy' => 'allow-all'
    ];
    $enabled = false;
    $origin = [
        'Items' => [
            [
                'DomainName' => $s3BucketURL,
                'Id' => $originName,
                'OriginPath' => '',
                'CustomHeaders' => ['Quantity' => 0],
                'S3OriginConfig' => ['OriginAccessIdentity' => '']
            ]
        ],
        'Quantity' => 1
    ];
    $distribution = [
        'CallerReference' => $callerReference,
        'Comment' => $comment,
        'DefaultCacheBehavior' => $defaultCacheBehavior,
        'Enabled' => $enabled,
        'Origins' => $origin
    ];

    $cloudFrontClient = new Aws\CloudFront\CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-1'
    ]);

    echo createS3Distribution($cloudFrontClient, $distribution);
}

// Uncomment the following line to run this code in an AWS account.
// createsTheS3Distribution();
```

## 检索 CloudFront 分配
<a name="retrieve-a-cf-distribution"></a>

要检索指定 CloudFront 分配的状态和详细信息，请使用 [GetDistribution](https://docs.aws.amazon.com/cloudfront/latest/APIReference/API_GetDistribution.html) 操作。

 **导入**。

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
```

 **示例代码** 

```
function getDistribution($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId
        ]);

        $message = '';

        if (isset($result['Distribution']['Status'])) {
            $message = 'The status of the distribution with the ID of ' .
                $result['Distribution']['Id'] . ' is currently ' .
                $result['Distribution']['Status'];
        }

        if (isset($result['@metadata']['effectiveUri'])) {
            $message .= ', and the effective URI is ' .
                $result['@metadata']['effectiveUri'] . '.';
        } else {
            $message = 'Error: Could not get the specified distribution. ' .
                'The distribution\'s status is not available.';
        }

        return $message;
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function getsADistribution()
{
    $distributionId = 'E1BTGP2EXAMPLE';

    $cloudFrontClient = new Aws\CloudFront\CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-1'
    ]);

    echo getDistribution($cloudFrontClient, $distributionId);
}

// Uncomment the following line to run this code in an AWS account.
// getsADistribution();
```

## 列出 CloudFront 分配
<a name="list-cf-distributions"></a>

使用 [ListDistributions](https://docs.aws.amazon.com/cloudfront/latest/APIReference/API_ListDistributions.html) 操作，从您的当前账户中获取指定 AWS 区域中现有 CloudFront 分配的列表。

 **导入**。

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
```

 **示例代码** 

```
function listDistributions($cloudFrontClient)
{
    try {
        $result = $cloudFrontClient->listDistributions([]);
        return $result;
    } catch (AwsException $e) {
        exit('Error: ' . $e->getAwsErrorMessage());
    }
}

function listTheDistributions()
{
    $cloudFrontClient = new Aws\CloudFront\CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-2'
    ]);

    $distributions = listDistributions($cloudFrontClient);

    if (count($distributions) == 0) {
        echo 'Could not find any distributions.';
    } else {
        foreach ($distributions['DistributionList']['Items'] as $distribution) {
            echo 'The distribution with the ID of ' . $distribution['Id'] .
                ' has the status of ' . $distribution['Status'] . '.' . "\n";
        }
    }
}

// Uncomment the following line to run this code in an AWS account.
// listTheDistributions();
```

## 更新 CloudFront 分配
<a name="update-a-cf-distribution"></a>

更新 CloudFront 分配的操作与创建分配的操作类似。但是，当您更新分配时，更多字段都是必填字段且必须包含所有值。要对现有分配进行更改，我们建议您首先检索现有分配，然后更新您要在 `$distribution` 数组中更改的值。

要更新指定的 CloudFront 分配，请使用 [UpdateDistribution](https://docs.aws.amazon.com/cloudfront/latest/APIReference/API_UpdateDistribution.html) 操作。

 **导入**。

```
require 'vendor/autoload.php';

use Aws\CloudFront\CloudFrontClient;
use Aws\Exception\AwsException;
```

 **示例代码** 

```
function updateDistribution(
    $cloudFrontClient,
    $distributionId,
    $distributionConfig,
    $eTag
) {
    try {
        $result = $cloudFrontClient->updateDistribution([
            'DistributionConfig' => $distributionConfig,
            'Id' => $distributionId,
            'IfMatch' => $eTag
        ]);

        return 'The distribution with the following effective URI has ' .
            'been updated: ' . $result['@metadata']['effectiveUri'];
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function getDistributionConfig($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId,
        ]);

        if (isset($result['Distribution']['DistributionConfig'])) {
            return [
                'DistributionConfig' => $result['Distribution']['DistributionConfig'],
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        } else {
            return [
                'Error' => 'Error: Cannot find distribution configuration details.',
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        }
    } catch (AwsException $e) {
        return [
            'Error' => 'Error: ' . $e->getAwsErrorMessage()
        ];
    }
}

function getDistributionETag($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId,
        ]);

        if (isset($result['ETag'])) {
            return [
                'ETag' => $result['ETag'],
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        } else {
            return [
                'Error' => 'Error: Cannot find distribution ETag header value.',
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        }
    } catch (AwsException $e) {
        return [
            'Error' => 'Error: ' . $e->getAwsErrorMessage()
        ];
    }
}

function updateADistribution()
{
    // $distributionId = 'E1BTGP2EXAMPLE';
    $distributionId = 'E1X3BKQ569KEMH';

    $cloudFrontClient = new CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-1'
    ]);

    // To change a distribution, you must first get the distribution's
    // ETag header value.
    $eTag = getDistributionETag($cloudFrontClient, $distributionId);

    if (array_key_exists('Error', $eTag)) {
        exit($eTag['Error']);
    }

    // To change a distribution, you must also first get information about
    // the distribution's current configuration. Then you must use that
    // information to build a new configuration.
    $currentConfig = getDistributionConfig($cloudFrontClient, $distributionId);

    if (array_key_exists('Error', $currentConfig)) {
        exit($currentConfig['Error']);
    }

    // To change a distribution's configuration, you can set the
    // distribution's related configuration value as part of a change request,
    // for example:
    // 'Enabled' => true
    // Some configuration values are required to be specified as part of a change
    // request, even if you don't plan to change their values. For ones you
    // don't want to change but are required to be specified, you can just reuse
    // their current values, as follows.
    $distributionConfig = [
        'CallerReference' => $currentConfig['DistributionConfig']["CallerReference"],
        'Comment' => $currentConfig['DistributionConfig']["Comment"],
        'DefaultCacheBehavior' => $currentConfig['DistributionConfig']["DefaultCacheBehavior"],
        'DefaultRootObject' => $currentConfig['DistributionConfig']["DefaultRootObject"],
        'Enabled' => $currentConfig['DistributionConfig']["Enabled"],
        'Origins' => $currentConfig['DistributionConfig']["Origins"],
        'Aliases' => $currentConfig['DistributionConfig']["Aliases"],
        'CustomErrorResponses' => $currentConfig['DistributionConfig']["CustomErrorResponses"],
        'HttpVersion' => $currentConfig['DistributionConfig']["HttpVersion"],
        'CacheBehaviors' => $currentConfig['DistributionConfig']["CacheBehaviors"],
        'Logging' => $currentConfig['DistributionConfig']["Logging"],
        'PriceClass' => $currentConfig['DistributionConfig']["PriceClass"],
        'Restrictions' => $currentConfig['DistributionConfig']["Restrictions"],
        'ViewerCertificate' => $currentConfig['DistributionConfig']["ViewerCertificate"],
        'WebACLId' => $currentConfig['DistributionConfig']["WebACLId"]
    ];

    echo updateDistribution(
        $cloudFrontClient,
        $distributionId,
        $distributionConfig,
        $eTag['ETag']
    );
}

// Uncomment the following line to run this code in an AWS account.
// updateADistribution();
```

## 禁用 CloudFront 分配
<a name="disable-a-cf-distribution"></a>

要停用或删除分配，请将其状态从“已部署”更改为“已禁用”。

要禁用指定的 CloudFront 分配，请使用 [DisableDistribution](https://docs.aws.amazon.com/cloudfront/latest/APIReference/API_DisableDistribution.html) 操作。

 **导入**。

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
```

 **示例代码** 

```
function disableDistribution(
    $cloudFrontClient,
    $distributionId,
    $distributionConfig,
    $eTag
) {
    try {
        $result = $cloudFrontClient->updateDistribution([
            'DistributionConfig' => $distributionConfig,
            'Id' => $distributionId,
            'IfMatch' => $eTag
        ]);
        return 'The distribution with the following effective URI has ' .
            'been disabled: ' . $result['@metadata']['effectiveUri'];
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function getDistributionConfig($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId,
        ]);

        if (isset($result['Distribution']['DistributionConfig'])) {
            return [
                'DistributionConfig' => $result['Distribution']['DistributionConfig'],
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        } else {
            return [
                'Error' => 'Error: Cannot find distribution configuration details.',
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        }
    } catch (AwsException $e) {
        return [
            'Error' => 'Error: ' . $e->getAwsErrorMessage()
        ];
    }
}

function getDistributionETag($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId,
        ]);

        if (isset($result['ETag'])) {
            return [
                'ETag' => $result['ETag'],
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        } else {
            return [
                'Error' => 'Error: Cannot find distribution ETag header value.',
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        }
    } catch (AwsException $e) {
        return [
            'Error' => 'Error: ' . $e->getAwsErrorMessage()
        ];
    }
}

function disableADistribution()
{
    $distributionId = 'E1BTGP2EXAMPLE';

    $cloudFrontClient = new Aws\CloudFront\CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-1'
    ]);

    // To disable a distribution, you must first get the distribution's
    // ETag header value.
    $eTag = getDistributionETag($cloudFrontClient, $distributionId);

    if (array_key_exists('Error', $eTag)) {
        exit($eTag['Error']);
    }

    // To delete a distribution, you must also first get information about
    // the distribution's current configuration. Then you must use that
    // information to build a new configuration, including setting the new
    // configuration to "disabled".
    $currentConfig = getDistributionConfig($cloudFrontClient, $distributionId);

    if (array_key_exists('Error', $currentConfig)) {
        exit($currentConfig['Error']);
    }

    $distributionConfig = [
        'CacheBehaviors' => $currentConfig['DistributionConfig']["CacheBehaviors"],
        'CallerReference' => $currentConfig['DistributionConfig']["CallerReference"],
        'Comment' => $currentConfig['DistributionConfig']["Comment"],
        'DefaultCacheBehavior' => $currentConfig['DistributionConfig']["DefaultCacheBehavior"],
        'DefaultRootObject' => $currentConfig['DistributionConfig']["DefaultRootObject"],
        'Enabled' => false,
        'Origins' => $currentConfig['DistributionConfig']["Origins"],
        'Aliases' => $currentConfig['DistributionConfig']["Aliases"],
        'CustomErrorResponses' => $currentConfig['DistributionConfig']["CustomErrorResponses"],
        'HttpVersion' => $currentConfig['DistributionConfig']["HttpVersion"],
        'Logging' => $currentConfig['DistributionConfig']["Logging"],
        'PriceClass' => $currentConfig['DistributionConfig']["PriceClass"],
        'Restrictions' => $currentConfig['DistributionConfig']["Restrictions"],
        'ViewerCertificate' => $currentConfig['DistributionConfig']["ViewerCertificate"],
        'WebACLId' => $currentConfig['DistributionConfig']["WebACLId"]
    ];

    echo disableDistribution(
        $cloudFrontClient,
        $distributionId,
        $distributionConfig,
        $eTag['ETag']
    );
}

// Uncomment the following line to run this code in an AWS account.
// disableADistribution();
```

## 删除 CloudFront 分配
<a name="delete-a-cf-distribution"></a>

一旦分配处于已禁用状态，您即可删除分配。

要删除指定的 CloudFront 分配，请使用 [DeleteDistribution](https://docs.aws.amazon.com/cloudfront/latest/APIReference/API_DeleteDistribution.html) 操作。

 **导入**。

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
```

 **示例代码** 

```
function deleteDistribution($cloudFrontClient, $distributionId, $eTag)
{
    try {
        $result = $cloudFrontClient->deleteDistribution([
            'Id' => $distributionId,
            'IfMatch' => $eTag
        ]);
        return 'The distribution at the following effective URI has ' .
            'been deleted: ' . $result['@metadata']['effectiveUri'];
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function getDistributionETag($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId,
        ]);

        if (isset($result['ETag'])) {
            return [
                'ETag' => $result['ETag'],
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        } else {
            return [
                'Error' => 'Error: Cannot find distribution ETag header value.',
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        }
    } catch (AwsException $e) {
        return [
            'Error' => 'Error: ' . $e->getAwsErrorMessage()
        ];
    }
}

function deleteADistribution()
{
    $distributionId = 'E17G7YNEXAMPLE';

    $cloudFrontClient = new Aws\CloudFront\CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-1'
    ]);

    // To delete a distribution, you must first get the distribution's
    // ETag header value.
    $eTag = getDistributionETag($cloudFrontClient, $distributionId);

    if (array_key_exists('Error', $eTag)) {
        exit($eTag['Error']);
    } else {
        echo deleteDistribution(
            $cloudFrontClient,
            $distributionId,
            $eTag['ETag']
        );
    }
}

// Uncomment the following line to run this code in an AWS account.
// deleteADistribution();
```