无法将远程文件下载到服务器

Question

远程文件是一个附件，我可以获取标题，但我无法获取文件或内容。

 <?php
    error_reporting(E_ALL);
    //not working, with rb too
    //file_put_contents("natives.html", stream_get_contents(fopen("http://www.dev-c.com/nativedb/reference.html", 'r')));
    //same with rb too
    //file_put_contents("natives.html", fopen("http://www.dev-c.com/nativedb/reference.html", 'r'));
    //same
    //echo file_get_contents("http://www.dev-c.com/nativedb/reference.html");
    //same
    /*$url = 'http://www.dev-c.com/nativedb/reference.html';
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_BINARYTRANSFER, false);
    curl_setopt($curl, CURLOPT_HEADER, true);
    $data = curl_exec($curl);
    curl_close($curl);
    echo $data;*/
    //same
    $url = 'http://www.dev-c.com/nativedb/reference.html';
    $file = basename($url);
    $fp = fopen($file, 'w');
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_FILE, $fp);
    $data = curl_exec($ch);
    curl_close($ch);
    fclose($fp);
?>

因此，如果我使用这些代码中的任何一个，则输出一无所有，并且网络服务器上的创建文件为空。文件：http：//www.dev-c.com/nativedb/reference.html

Answer 1

谢谢您的帮助，但问题在于编码。我必须发送标题"接受编码：gzip"，然后gzdecode输出。

<?php
error_reporting(E_ALL);
$url = 'http://www.dev-c.com/nativedb/reference.html';
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_BINARYTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
"Host: www.dev-c.com",
"Accept-Encoding: gzip"
));
$data = curl_exec($curl);
curl_close($curl);
echo gzdecode($data);
?>

Answer 2

我拉出了您提供示例的Web URL的标题。这就是我得到的：

HTTP/1.1 200 OK Server: nginx/1.12.0 Date: Fri, 23 Jun 2017 11:34:58 GMT Content-Type: application/octet-stream **Content-Length: 0** Connection: keep-alive Content-Description: reference.html Content-Disposition: attachment; filename=reference.html Content-Transfer-Encoding: binary Expires: Thu Jun 22 11:34:58 2017 GMT Cache-Control: must-revalidate Pragma: public Set-Cookie: PHPSESSID=f9d4eb515eeabfb461a11d056fdc7b78; path=/ Cache-Control: max-age=3600, private, proxy-revalidate

如您所见，内容长度：0为零。这可能是您获得空身体的原因之一。

如果您可以访问托管Reference.html的NGINX服务器，则可以尝试在尝试下载Referes reference.html时尝试丢弃/var/log/nginx/error.log的内容。

如果内容长度为零，则没有文件大小要下载。它指出了服务器设置的问题。