php、文件下载

发布于 2024-10-31 08:14:46 字数 797 浏览 1 评论 0原文

我正在使用简单的文件下载脚本：

if (file_exists($file)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename='.basename($file));
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file));
    ob_clean();
    flush();
    readfile($file);
    exit;
}

它在我的本地服务器上运行，最大容量为 200mb。

当我在网站中尝试此代码时，它会下载 173KB 而不是 200MB 的文件。

我检查了所有内容，编写了一些自定义代码（使用 ob 函数和 fread 而不是 readfile），但无法下载大文件。

谢谢您的回答。

我正在使用 Apache 2.2、PHP 5.3
处理大文件的所有 PHP 设置都可以。（执行时间、内存限制、...

原文

I am using the simple file downloading script:

if (file_exists($file)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename='.basename($file));
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file));
    ob_clean();
    flush();
    readfile($file);
    exit;
}

It is working on my localserver upto 200mb.

When i try this code in my website it downloads 173KB instead of 200MB file.

I checked everything, wrote some custom code (using ob functions and fread instead of readfile) but can't download big files.

Thank you for your answers.

I am using Apache 2.2, PHP 5.3
All PHP settings to deal with big files are ok. (execution times, memory limits, ...

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梨涡少年 2024-11-07 08:14:46

我对以下代码遇到的一个问题是您无法控制输出流，您让 PHP 处理它而不确切知道后台发生了什么：

您应该做的是设置一个可以控制和复制的输出系统accros服务器。

例如：

if (file_exists($file))
{
    if (FALSE!== ($handler = fopen($file, 'r')))
    {
        header('Content-Description: File Transfer');
        header('Content-Type: application/octet-stream');
        header('Content-Disposition: attachment; filename='.basename($file));
        header('Content-Transfer-Encoding: chunked'); //changed to chunked
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Pragma: public');
        //header('Content-Length: ' . filesize($file)); //Remove

        //Send the content in chunks
        while(false !== ($chunk = fread($handler,4096)))
        {
            echo $chunk;
        }
    }
    exit;
}
echo "<h1>Content error</h1><p>The file does not exist!</p>";

这只是基本的，但请尝试一下！

另请阅读我的回复： file_get_contents => PHP 致命错误：允许的内存耗尽

One issue I have with the following code is you have no control over the output stream, your letting PHP handle it without knowing exactly what is going on within the background:

What you should do is set up an output system that you can control and replicated accros servers.

For example:

if (file_exists($file))
{
    if (FALSE!== ($handler = fopen($file, 'r')))
    {
        header('Content-Description: File Transfer');
        header('Content-Type: application/octet-stream');
        header('Content-Disposition: attachment; filename='.basename($file));
        header('Content-Transfer-Encoding: chunked'); //changed to chunked
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Pragma: public');
        //header('Content-Length: ' . filesize($file)); //Remove

        //Send the content in chunks
        while(false !== ($chunk = fread($handler,4096)))
        {
            echo $chunk;
        }
    }
    exit;
}
echo "<h1>Content error</h1><p>The file does not exist!</p>";

This is only basic but give it a go!

Also read my reply here: file_get_contents => PHP Fatal error: Allowed memory exhausted

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