基于 Yii 2 的 HTTP 客户端扩展，下载文件且另存为具体的文件名(下载远程文件至服务器)，内存占用从 400 MB 下降至 7 MB 的实现
1、现在已经实现：复制来源的资源文件至渠道发布的资源目录，返回相对路径(同步)。代码如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /** * 复制来源的资源文件至渠道发布的资源目录，返回相对路径(同步) * @param string $source 来源 * 格式如下：spider * @param array $assets 来源的资源文件的绝对URL * 格式如下： * [ * [ * 'type' => 'image', * 'absolute_url' => 'http://localhost/spider/storage/spider/images/1.png', * ], * [ * 'type' => 'video', * 'absolute_url' => 'http://127.0.0.1/channel-pub-api/storage/spider/videos/7月份北上广深等十大城市租金环比上涨 看东方 20180820 高清_高清.mp4', * ], * ] * * @return array $channelPubApiAssetAbsolutePaths 渠道发布的资源文件的相对路径 * 格式如下： * [ * [ * 'type' => 'image', * 'relative_path' => '/2018/09/20/1537439889.2333.1441541478.png', * ], * [ * 'type' => 'video', * 'relative_path' => '/2018/09/20/1537439889.2403.62871268.mp4', * ], * ] * * @throws UnprocessableEntityHttpException 如果来源的资源文件不是以来源的 HOME URL + BASE URL 开头，将抛出 422 HTTP 异常 * @throws NotFoundHttpException 如果来源的资源文件不存在，将抛出 404 HTTP 异常 * @throws ServerErrorHttpException 如果创建目录失败，将抛出 500 HTTP 异常 * @throws ServerErrorHttpException 如果复制来源的资源文件至渠道发布的资源目录失败，将抛出 500 HTTP 异常 * @throws \yii\base\Exception if the directory could not be created (i.e. php error due to parallel changes) */public static function copyAssetsSync($source, $assets){ // file_put_contents('/mcloud/www/channel-pub-api/console/runtime/copy-assets-sync-source-' . $source . '-' . time() . '.txt', $source); // file_put_contents('C:/phpStudy/PHPTutorial/WWW/channel-pub-api/douyin/runtime/copy-assets-sync-assets-' . $source . '-' . time() . '.txt', print_r($assets, true)); // 不是以来源的 HOME URL + BASE URL 开头的来源的资源文件 $notAbsoluteUrlStartKeys = []; // 不存在的来源的资源文件 $notExistsKeys = []; // 渠道发布的资源文件的相对路径 $channelPubApiAssetAbsolutePaths = []; foreach ($assets as $key => $asset) { if ($index = stripos($asset['absolute_url'], '?')) { $absoluteUrl = substr($asset['absolute_url'], 0, $index); $asset['absolute_url'] = $absoluteUrl; $assets[$key]['absolute_url'] = $absoluteUrl; } // 检查来源的资源文件的绝对URL是否以来源的 HOME URL + BASE URL 开头 if (!StringHelper::startsWith($asset['absolute_url'], Yii::$app->params['source']['asset'][$asset['type']]['hostInfo'] . Yii::$app->params['source']['asset'][$asset['type']]['baseUrl'])) { $notAbsoluteUrlStartKeys[] = $asset['absolute_url']; } else { // 获取来源的资源文件的绝对路径 $sourceAssetAbsolutePath = Yii::$app->params['source']['asset'][$asset['type']]['basePath'] . str_replace(Yii::$app->params['source']['asset'][$asset['type']]['hostInfo'] . Yii::$app->params['source']['asset'][$asset['type']]['baseUrl'], '', $asset['absolute_url']); // 检查来源的资源文件是否存在 if (!file_exists($sourceAssetAbsolutePath)) { $notExistsKeys[] = $sourceAssetAbsolutePath; } } } if (!empty($notAbsoluteUrlStartKeys)) { $notAbsoluteUrlStartKeys = implode(",", $notAbsoluteUrlStartKeys); throw new UnprocessableEntityHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202003'), ['not_absolute_url_start_keys' => $notAbsoluteUrlStartKeys])), 202003); } if (!empty($notExistsKeys)) { $notExistsKeys = implode(",", $notExistsKeys); throw new NotFoundHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202004'), ['not_exists_keys' => $notExistsKeys])), 202004); } foreach ($assets as $key => $asset) { // 获取来源的资源文件的绝对路径 $sourceAssetAbsolutePath = Yii::$app->params['source']['asset'][$asset['type']]['basePath'] . str_replace(Yii::$app->params['source']['asset'][$asset['type']]['hostInfo'] . Yii::$app->params['source']['asset'][$asset['type']]['baseUrl'], '', $asset['absolute_url']); // 获取来源的资源文件的路径信息 $pathInfo = pathinfo($sourceAssetAbsolutePath); // 渠道发布的资源文件的相对路径 $directory = date('Y/m/d'); $channelPubApiAssetRelativePath = '/' . $directory . '/' . microtime(true) . '.' . mt_rand() . '.' . $pathInfo['extension']; // 渠道发布的资源文件的绝对路径 $channelPubApiAssetAbsolutePath = Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . $channelPubApiAssetRelativePath; // 创建目录 if (!FileHelper::createDirectory(Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . '/' . $directory)) { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202005'), ['directory' => Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . '/' . $directory])), 202005); } // 复制来源的资源文件至渠道发布的资源目录 if (!copy($sourceAssetAbsolutePath, $channelPubApiAssetAbsolutePath)) { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202006'), ['source_asset_absolute_path' => $sourceAssetAbsolutePath])), 202006); } $channelPubApiAssetAbsolutePaths[$key] = [ 'type' => $asset['type'], 'relative_path' => $channelPubApiAssetRelativePath, ]; } return $channelPubApiAssetAbsolutePaths;} |
2、现在需要有所调整，能够再实现：下载文件且另存为具体的文件名，而不是复制。
3、先验证第一步骤的实现。调用此方法，打印响应结果，代码如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | $copyAssetsResult = AssetService::copyAssetsSync( 'spider', [ [ 'type' => 'image', ], [ 'type' => 'video', 'absolute_url' => 'http://127.0.0.1/channel-pub-api/storage/spider/videos/02018684a82381d9c59bb085e18e1a5d.mp4', ], ]);print_r($copyAssetsResult);exit; |
4、打印响应结果，如图1
图1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | Array( [0] => Array ( [type] => image [relative_path] => /2020/11/24/1606187993.2607.476899553.png ) [1] => Array ( [type] => video [relative_path] => /2020/11/24/1606187993.2711.210785146.mp4 )) |
5、查看渠道发布的资源目录中，复制后的文件。其绝对路径分别为：E:\wwwroot\channel-pub-api\storage\channel-pub-api\images\2020\11\24\1606187993.2607.476899553.png、E:\wwwroot\channel-pub-api\storage\channel-pub-api\videos\2020\11\24\1606187993.2711.210785146.mp4。如图2
图2
6、实现 HTTP 模型，/common/logics/http/asset_api/Download.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | <?php/** * Created by PhpStorm. * User: Qiang Wang * Date: 2020/11/24 * Time: 15:47 */namespace common\logics\http\asset_api;use Yii;use yii\base\InvalidConfigException;use yii\httpclient\Client;use yii\httpclient\Exception;use yii\web\ServerErrorHttpException;/** * 资源接口的下载 * * @author Qiang Wang <shuijingwanwq@163.com> * @since 1.0 */class Download extends Model{ /** * HTTP请求，基于来源的资源文件的绝对URL下载文件 * * @param string $url 来源的资源文件的绝对URL * * @return string * 格式如下： * * @throws ServerErrorHttpException 如果响应状态码不等于20x * @throws InvalidConfigException * @throws Exception */ public function download($url) { $client = new Client([ 'transport' => 'yii\httpclient\CurlTransport' // 只有 cURL 支持此选项 ]); $response = $client->createRequest() ->setMethod('GET') ->setUrl($url) ->send(); // 检查响应状态码是否等于20x if ($response->isOk) { return $response->content; } else { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202218'), ['status_code' => $response->getStatusCode()])), 202218); } }} |
7、新的实现：下载来源的资源文件后写入至渠道发布的资源目录，返回相对路径(同步)。代码如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | /* HTTP请求，基于来源的资源文件的绝对URL下载文件 */$httpAssetApiDownload = new HttpAssetApiDownload();foreach ($assets as $key => $asset) { $downloadAsset = $httpAssetApiDownload->download($asset['absolute_url']); // 渠道发布的资源文件的相对路径 $directory = date('Y/m/d'); $channelPubApiAssetRelativePath = '/' . $directory . '/' . microtime(true) . '.' . mt_rand() . '.' . $asset['extension']; // 渠道发布的资源文件的绝对路径 $channelPubApiAssetAbsolutePath = Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . $channelPubApiAssetRelativePath; // 创建目录 if (!FileHelper::createDirectory(Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . '/' . $directory)) { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202005'), ['directory' => Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . '/' . $directory])), 202005); } // 下载来源的资源文件后写入至渠道发布的资源目录 if (!file_put_contents($channelPubApiAssetAbsolutePath, $downloadAsset, LOCK_EX)) { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202220'), ['source_asset_absolute_url' => $asset['source_asset_absolute_url']])), 202220); } $channelPubApiAssetAbsolutePaths[$key] = [ 'type' => $asset['type'], 'relative_path' => $channelPubApiAssetRelativePath, ];} |
8、运行代码，视频文件的大小为：396 MB，报错：Allowed memory size of 134217728 bytes exhausted (tried to allocate 62918656 bytes)。如图3
图3
1 2 3 4 5 6 7 8 9 10 11 12 | { "name": "PHP Fatal Error", "message": "Allowed memory size of 134217728 bytes exhausted (tried to allocate 62918656 bytes)", "code": 1, "type": "yii\\base\\ErrorException", "file": "E:\\wwwroot\\channel-pub-api\\vendor\\yiisoft\\yii2-httpclient\\src\\CurlTransport.php", "line": 40, "stack-trace": [ "#0 [internal function]: yii\\base\\ErrorHandler->handleFatalError()", "#1 {main}" ]} |
9、编辑 php.ini 文件，修改 memory_limit = 128M 为 memory_limit = 1024M。设置为 512M 时仍然报错。运行成功。查看日志，占用内存：406 MB。如图4
图4
10、查看渠道发布的资源目录中，复制后的文件。其绝对路径分别为：E:\wwwroot\channel-pub-api\storage\channel-pub-api\images\2020\11\25\1606291709.4136.2030184970.png、E:\wwwroot\channel-pub-api\storage\channel-pub-api\videos\2020\11\25\1606291735.722.2031039128.mp4。符合预期。如图5
图5
11、此方案的问题在于：内存占用随着下载文件的大小而变化。可能因为下载文件的大小超出 memory_limit 而失败。决定再想办法优化完善。
12、重构 HTTP 模型，/common/logics/http/asset_api/Download.php。使用方法：setOutputFile()。与 yii\httpclient\CurlTransport 一起使用以设置传输写入的文件。如图6
图6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | <?php/** * Created by PhpStorm. * User: Qiang Wang * Date: 2020/11/24 * Time: 15:47 */namespace common\logics\http\asset_api;use Yii;use yii\base\InvalidConfigException;use yii\httpclient\Client;use yii\httpclient\Exception;use yii\web\ServerErrorHttpException;/** * 资源接口的下载 * * @author Qiang Wang <shuijingwanwq@163.com> * @since 1.0 */class Download extends Model{ /** * HTTP请求，基于来源的资源文件的绝对URL下载文件 * * @param string $url 来源的资源文件的绝对URL * @param string $absolutePath 资源文件的绝对路径(下载至的目标路径) * * @return bool * 格式如下：true * * @throws ServerErrorHttpException 如果响应状态码不等于20x * @throws InvalidConfigException * @throws Exception */ public function download($url, $absolutePath) { // 打开即将下载的本地文件，在该文件上打开一个流 $handle = fopen($absolutePath, 'w'); if (!$handle) { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202220'), ['absolute_path' => $absolutePath])), 202220); } $client = new Client([ 'transport' => 'yii\httpclient\CurlTransport' // 只有 cURL 支持此选项 ]); $response = $client->createRequest() ->setMethod('GET') ->setUrl($url) ->setOutputFile($handle) ->send(); // 关闭一个已打开的文件指针 fclose($handle); // 检查响应状态码是否等于20x if ($response->isOk) { return $response->content; } else { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202218'), ['status_code' => $response->getStatusCode()])), 202218); } }} |
13、重构新的实现：下载来源的资源文件同步写入至渠道发布的资源目录，返回相对路径(同步)。代码如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | /* HTTP请求，基于来源的资源文件的绝对URL下载文件 */$httpAssetApiDownload = new HttpAssetApiDownload();foreach ($assets as $key => $asset) { // 渠道发布的资源文件的相对路径 $directory = date('Y/m/d'); $channelPubApiAssetRelativePath = '/' . $directory . '/' . microtime(true) . '.' . mt_rand() . '.' . $asset['extension']; // 渠道发布的资源文件的绝对路径 $channelPubApiAssetAbsolutePath = Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . $channelPubApiAssetRelativePath; // 创建目录 if (!FileHelper::createDirectory(Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . '/' . $directory)) { throw new ServerErrorHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '202005'), ['directory' => Yii::$app->params['channelPubApi']['asset'][$asset['type']]['basePath'] . '/' . $directory])), 202005); } // HTTP请求，基于来源的资源文件的绝对URL下载文件 $httpAssetApiDownload->download($asset['absolute_url'], $channelPubApiAssetAbsolutePath); $channelPubApiAssetAbsolutePaths[$key] = [ 'type' => $asset['type'], 'relative_path' => $channelPubApiAssetRelativePath, ];} |
14、运行成功。查看日志，占用内存：6.377 MB。下载文件的大小不再受到 memory_limit 的限制。如图7
图7
15、为何采用 cURL ，原因在于：cURL 的性能优于 file_get_contents 和 fopen。但是可以肯定的是内存占用优于 file_get_contents。未经测试，此结论为 PHP 官方文档所述。链接：https://www.php.net/manual/zh/ref.curl.php 。如图8
图8
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