使用PHP可下载的大型远程映像 [英] Downloadable large remote images using PHP

问题描述

我知道有很多类似的帖子，但在爬行SO后，仍然找不到答案。

我想写一个脚本，用于下载大型远程图像的代理（每个大约10mb）。到目前为止，我使用curl读取远程图像url，然后使用标题强制下载。类似的东西（不是完整脚本）：

  function getRemoteFile（$ url）{
 $ ch = curl_init ; 
 curl_setopt（$ ch，CURLOPT_URL，$ url）; 
 curl_setopt（$ ch，CURLOPT_RETURNTRANSFER，1）; 
 curl_setopt（$ ch，CURLOPT_CONNECTTIMEOUT，50）; 
 $ data = curl_exec（$ ch）; 
 curl_close（$ ch）; 
 return $ data; 
} 
 
 header（'Content-Type：octet / stream'）; 
 header（'Content-Disposition：attachment; filename =random.jpg'）; 
 header（'Content-Length：'。strlen（$ file））; 
 echo $ file; 
  

这样可以工作，但是有一个更好的方法，因为这个脚本可能会看到很多流量 - 也许

图片将从同一网络上的服务器提供。 >解决方案

10mb 非常大， 300个并发用户有10个请求。

您正在说 10 * 300 * 10 = 30,000 MB = 30GB

我建议您使用工作队列

您可以使用 Gearman

  $ worker = new GearmanWorker（）; 
 $ worker-> addServer（）; 
 $ worker-> addFunction（download，getRemoteFile）; 
 while（$ worker-> work（））; 
  

您不能使用AJAX并检查图片是否已下载并显示

我还建议您查看以下

：

• zeromq


• beanstalkd


• dropr li>
  

I know there are lots of posts similar to this, but after crawling SO, still not found the answer.

I am looking to write a script that acts as a proxy for downloading large remote images (around 10mb each). So far I am using curl to read in the remote image url and then using headers to force a download. Something like (not the full script):

function getRemoteFile($url) {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 50);
  $data = curl_exec($ch);
  curl_close($ch);
  return $data;
}

header('Content-Type: octet/stream');
header('Content-Disposition: attachment; filename="random.jpg"');
header('Content-Length: ' . strlen($file));
echo $file;

This works, but is there a better way as this script may see quite a lot of traffic - maybe 300 concurrent users with 10 requests each?

The images will be served from a server on the same network.

解决方案

10mb is pretty large with 300 concurrent users with 10 requests.

You are saying 10 * 300 * 10 = 30,000 MB = 30GB

I Suggest you use a Job Queue

You can use Gearman

$worker= new GearmanWorker();
$worker->addServer();
$worker->addFunction("download", "getRemoteFile");
while ($worker->work());

You can not use AJAX and to check if the image is downloaded and display it

I would also recommend you look at the following

• zeromq
• beanstalkd
• dropr

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