[英]Download CSV in Mezzio Framework (Zend/Laminas)
在 Mezzion 框架中,我有下一個處理程序:
<?php
namespace Bgc\Handler;
use App\Service\GenerateReportToCSV;
use Bgc\Queue\BGCQueueManager;
use Laminas\Diactoros\Response\TextResponse;
use League\Csv\Writer;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
class DownloadBgcReportHandler implements RequestHandlerInterface
{
protected $bgcQManager;
protected $reportToCSV;
public function __construct(BGCQueueManager $bgcQManager, $reportToCSV)
{
$this->bgcQManager = $bgcQManager;
$this->reportToCSV = $reportToCSV;
}
public function handle(ServerRequestInterface $request): TextResponse
{
$queryParams = $request->getQueryParams();
$params = [];
if (isset($queryParams['startDate'])) {
$starDate = new \DateTime($queryParams['startDate']);
$params['startDate'] = $starDate->modify('midnight');
}
if (isset($queryParams['startDate'])) {
$endDate = new \DateTime($queryParams['endDate']);
$params['endDate'] = $endDate->modify('tomorrow');
}
$itemsBGC = $this->bgcQManager->getDataToDownload($params);
$time = time();
$fileName = "bgc-report-$time.csv";
$csv = Writer::createFromFileObject(new \SplFileObject());
$csv->insertOne($this->reportToCSV->getHeadingsBGC());
foreach ($itemsBGC as $item) {
$csv->insertOne($item);
}
return new TextResponse($csv->getContent(), 200, [
'Content-Type' => 'text/csv',
'Content-Transfer-Encoding' => 'binary',
'Content-Disposition' => "attachment; filename='$fileName'"
]);
}
}
我有以下錯誤:
Whoops\Exception\ErrorException: Declaration of Bgc\Handler\DownloadBgcReportHandler::handle(Psr\Http\Message\ServerRequestInterface $request): Laminas\Diactoros\Response\TextResponse must be compatible with Psr\Http\Server\RequestHandlerInterface::handle(Psr\Http\Message\ServerRequestInterface $request): Psr\Http\Message\ResponseInterface in file /home/peter/proyectos/revelations-thena-api/src/Bgc/src/Handler/DownloadBgcReportHandler.php on line 20
我不知道,要創建一個可下載的文件。 hadbler 與 Json 一起工作得很好。 我試圖從 ResponseInterface 更改為 TextResponse。
如何下載文件 CSV? 謝謝
您收到的錯誤是告訴您您的方法簽名不符合接口的方法簽名。
請求處理程序接口:
interface RequestHandlerInterface
{
public function handle(ServerRequestInterface $request): ResponseInterface;
}
如您所見,簽名聲明返回了一個ResponseInterface
類型的對象。
您修改了簽名:
class DownloadBgcReportHandler implements RequestHandlerInterface
{
public function handle(ServerRequestInterface $request): TextResponse;
}
簽名必須相同,但隨后您可以毫無問題地返回 TextResponse (因為它擴展了Laminas\\Diactoros\\Response
,它實現了Psr\\Http\\Message\\ResponseInterface
)
只需改變它,它就會起作用:)
你已經修改了你的處理方法,所以現在你沒有滿足 RequestHandlerInterface 的要求
用接口中強制執行的ResponseInterface
替換處理程序的返回值: RequestHandlerInterface
所以我認為你最好在以下方面得到幫助:
<?php
namespace Bgc\Handler;
use App\Service\GenerateReportToCSV;
use Bgc\Queue\BGCQueueManager;
use Laminas\Diactoros\Response;
use Laminas\Diactoros\Stream;
use League\Csv\Writer;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
class DownloadBgcReportHandler implements RequestHandlerInterface
{
protected $bgcQManager;
protected $reportToCSV;
public function __construct(BGCQueueManager $bgcQManager, $reportToCSV)
{
$this->bgcQManager = $bgcQManager;
$this->reportToCSV = $reportToCSV;
}
public function handle(ServerRequestInterface $request): ResponseInterface
{
$queryParams = $request->getQueryParams();
$params = [];
if (isset($queryParams['startDate'])) {
$starDate = new \DateTime($queryParams['startDate']);
$params['startDate'] = $starDate->modify('midnight');
}
if (isset($queryParams['startDate'])) {
$endDate = new \DateTime($queryParams['endDate']);
$params['endDate'] = $endDate->modify('tomorrow');
}
$itemsBGC = $this->bgcQManager->getDataToDownload($params);
$time = time();
$fileName = "bgc-report-$time.csv";
// $csv = Writer::createFromFileObject(new \SplFileObject());
// $csv->insertOne($this->reportToCSV->getHeadingsBGC());
$csv = Writer::createFromString($this->reportToCSV->getHeadingsBGC());
foreach ($itemsBGC as $item) {
$csv->insertOne($item);
}
$body = new Stream($csv->getContent());
return new Response($body, 200, [
'Cache-Control' => 'must-revalidate',
'Content-Disposition' => 'attachment; filename=' . $fileName,
'Content-Length' => strval($body->getSize()),
'Content-Type' => 'text/csv',
'Content-Transfer-Encoding' => 'binary',
'Expires' => '0',
'Pragma' => 'public',
]);
}
}
PS:我已經評論了其中使用空的new \\SplFileObject()
的 2 行,因為所需的參數$filename
是空的(我不想在那里做出決定)並添加了一行Writer::createFromString()
。
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