laravel 响应流下载 returns 空文件

laravel response stream download returns empty file

我有一个控制器方法可以接收用户的下载请求,使用请求的 body 参数调用 REST API 端点。

API,在return,发送一个文件。

我正在使用 Guzzle 来发出 API 请求和 laravel 版本 5.4

$response->getBody()->getContents();的内容如下:

"""
request_id\ts_sku\tr_product_url\thuman_verdict\n
199\tSG-948\thttps://www.amazon.com/gp/offer-listing/B076CP7J4P?condition=new\tMatch\n
199\tZIB-601\thttps://www.amazon.com/gp/offer-listing/B07D9PN39C?condition=new\tMatch\n
199\tRCM-LG526\thttps://www.amazon.com/gp/offer-listing/B07FDJ3W7P?condition=new\tMatch\n
199\tGSI-335\thttps://www.amazon.com/gp/offer-listing/B07GNX1VSG?condition=new\tMatch\n
199\tZIB-489\thttps://www.amazon.com/gp/offer-listing/B07D9RCGXM?condition=new\tMatch\n
"""

此外,从 API 收到的 header 响应是:

Content-Type : ('text/tab-separated-values', none)
Content-Disposition : attachment; filename=/path/to/file1.tsv

我正在尝试在我的控制器中接收此文件,并且 return 响应作为流下载到用户的浏览器。

控制器方法如下:

    $client = new Client(["base_uri" => $this->apiBaseUrl]);
    $url = 'download/filterdownload/';

    try {
        $response = $client->request('POST', $url, ['headers'=>['Content-Type' => 'application/json'], 'body'=>json_encode($filterArr)]);
        # $resArr = json_decode($response, true);
    } catch (\Exception $e) {
        return redirect()->back()->with('error', $e->getMessage());
    }

    if(!empty($resArr) && array_key_exists('response', $resArr))
        return redirect()->back()->with('error', $resArr['response']);

    # return response
    $file = $response->getBody()->getContents();

    $file_name = $filterArr['client_name'].'_'.Carbon::now()->toDateString().'.tsv';
    $headers = [
        'Content-Disposition' => 'attachment; filename='. $file_name. ';'
    ];
    return response()->stream(function () {
        $file;
    }, 200, $headers);

这会下载一个文件,但该文件是空的。

也许有帮助:

 # return response
    $file = $response->getBody()->getContents();

    $file_name = $filterArr['client_name'].'_'.Carbon::now()->toDateString().'.tsv';
    $headers = [
        'Content-Disposition' => 'attachment; filename='. $file_name. ';'
    ];
    return response()->stream(function () use ($file)  { <-- edit
        $file;
    }, 200, $headers);

试试这个

        $streamFileData = $response->getBody()->getContents();
        $fileName = "test.pdf";
        $headers = [
            'Content-Type'        => 'application/octet-stream',
            'Content-Disposition' => 'attachment; filename=' . $fileName,
        ];
        $response = response( $streamFileData, 200, $headers );
        return $response;