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我正在尝试允许我网站的用户下载文件。不仅如此，我想将它烘焙到我创建/正在使用的前端控制器框架中。我可以进行下载，但是当尝试打开文件时，Adobe Reader 总是给出一个错误，指出该文件的类型不受支持或已损坏。在我的下载中，它说文件的大小是 0KB，这显然是错误的，所以我猜它已经损坏了。我不知道为什么。

我可以让下载工作，但跳过我的前端控制器框架并让它直接运行下载脚本。这个脚本看起来像这样，被称为 downloadManager.php，并从带有 href="/myApp/downloads/downloadManager.php 的链接调用：

<?php
 header("Content-Type: application/octet-stream");

$file = "eZACKe_1359081853_Week Three Sprints & Hurdles Workout 24th - 28th of Sept    (1).pdf";
header("Content-Disposition: attachment; filename=" . $file);
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
 header("Content-Description: File Transfer");
header("Content-Length: " . filesize($file));
flush(); // this doesn't really matter.
$fp = fopen($file, "r");
while (!feof($fp)) {
    echo fread($fp, 65536);
    flush(); // this is essential for large downloads
}
fclose($fp);
?>

这行得通，但我想保持我的框架正常工作。这是使用我的框架的代码流，链接 href 为 href="/myApp/downloadz?type='resume'&id='8'"：

url 被 apache 重写并转到 index.php，这是我的前端控制器：

<?php
class Foo {
static public function test($classname)
{
    if(preg_match('/\\\\/', $classname))
    {
        $path = str_replace('\\', '/', $classname);
    }
    else
    {
        $path = str_replace('_', '/', $classname);
    }

    if (is_readable($path.".php"))
    {
        require_once $path .".php";
    }
}
}
spl_autoload_register('\Foo::test');

\controller\Controller::run();
?>

这导致一个控制器：

static function run()
{
    $instance = new Controller();
    $instance->init();
    $instance->handleRequest();
}

init 建立一个 PDO MySQL 连接，并使用 Simple_XML_Load 加载一些配置文件

然后，

    function handleRequest()
{
    $request = new \controller\Request();
    $cmd_r = new \commands\common\CommandResolver();
    $cmd = $cmd_r->getCommand($request);
    $presenter = $cmd->execute($request);

    if(!$request->getProperty('ajax') && !is_a($cmd, '\commands\Download\DownloadCommand')) {
        echo $this->handleRender($request, $presenter);
    }
}

这里唯一需要注意的是 getCommand 并检查文件是否存在并使用反射

然后调用$cmd->execute，此时我们调用DownloadzCommand::execute，

    function execute(\controller\Request $request) {

    parent::execute($request);

    if($this->request->getProperty("type") == "resume" || $this->request->getProperty("type") == "coverLetter") {
        $this->handleJobApplicationDownload();
    }
}

private function handleJobApplicationDownload() {
    if(!$this->loggedInMember) {
        exit;
    }

    try {
        $idobj = new \mapper\IdentityObject ();
        $jobApplication = \domain\JobApplication::produceOne($idobj->field("jobApplication.jobApplicationId")->eq($this->request->getProperty("id"))->field("jobApplication.jobId")->eq("jobs.jobId", false)->field("businesses.businessId")->eq("jobs.businessId", false)->field("jobApplication.dateApplicationViewed")->isnull("", false), null, "JobBusinessJoin");

        // get here the jobApplication is legit - now make sure the logged in member is a recruiter for this business
        $idobj = new \mapper\IdentityObject ();
        $business = \domain\Business::produceOne($idobj->field("businessId")->eq($jobApplication->getState("businessId")));

        if(!$business->isRecruiter($this->loggedInMember->getId())) {
            exit;
        } else {
            if($this->request->getProperty("type") == "resume") {
                if($path = $jobApplication->getState("resumeUploadPath")) {
                    // have a resume path, move it over
                    $fullPath = "common/jobs/resumes/".$path;

                    $tempDest = "commands/Downloadz/$path";
                    copy($fullPath, $tempDest);
                } else {
                    exit;
                }
            } elseif($this->request->getProperty("type") == "coverLetter") {
                if($path = $jobApplication->getState("coverLetterUploadPath")) {
                    // have a coverLetter path, move it over
                    $fullPath = "common/jobs/coverLetters/".$path;
                } else {
                    exit;
                }
            }
        }
    } catch(\base\ObjectDoesNotExistException $e) {
        echo "nope";
    }


    header("Content-Type: application/octet-stream");
    header("Content-Disposition: attachment; filename=" . $path);
    header("Content-Type: application/octet-stream");
    header("Content-Type: application/download");
    header("Content-Description: File Transfer");
    header("Content-Length: " . filesize($path));
    flush(); // this doesn't really matter.
    $fp = fopen($file, "r");
    while (!feof($fp)) {
        echo fread($fp, 65536);
        flush(); // this is essential for large downloads
    }
    fclose($fp);

    unlink($path);

}

此时下载发生。虽然我打开文件，但它已损坏。

请注意，即使是简单的文本文件也会发生同样的事情。

此外，即使我跳过文件复制部分并将文件最初放在 commands/Downloadz 目录中，它也不起作用。

有任何想法吗？

4

2 回答 2

1

而不是使用：

$fp = fopen($file, "r");
while (!feof($fp)) {
    echo fread($fp, 65536);
    flush(); // this is essential for large downloads
}
fclose($fp);

利用readfile()

readfile($file);
于 2013-01-26T16:15:39.810 回答
1

我遇到了同样的问题，但在阅读http://davidwalsh.name/php-force-download之后，现在正在工作。

header('Pragma: public');  // required
header('Expires: 0');  // no cache
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Cache-Control: private', false);
header('Content-Type: application/pdf');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', filemtime($filepath)) . ' GMT');
header('Content-disposition: attachment; filename=' . $pathinfo['filename'] . '.pdf');
header("Content-Transfer-Encoding:  binary");
header('Content-Length: ' . filesize($filepath)); // provide file size
header('Connection: close');
readfile($filepath);
exit();

这对我有用。

于 2013-05-15T08:08:13.667 回答