将文件从外部链接远程下载到我的服务器 - 下载过早停止 [英] Remotely download a file from an external link to my server - download stops prematurely

问题描述

我有一个页面集，其中我输入文件的URL，我让我的服务器下载该文件，并将其保存到我的服务器上的文件夹。问题是，我不知道如何下载文件到我的服务器。我尝试了以下两种方法，他们都没有工作。

I have a page set where I enter the url of an file and I have my server download that file and save it into a folder on my server. The issue is that I dont know how to download a file to my server. I have tried both of the following methods, and they both didn't work.

这一个抛出一个关于失败的开放流的错误：

This one throws an error about a failed open stream:

$url = 'http://www.example.com/file.zip';
$enc = urlencode($url);
$dir = "/downloads/file.zip";
$raw = file_get_contents($enc);
file_put_contents($dir, $raw);

这一个工作，但我只得到一个270kb文件中的18kb：（我试图增加超时）

This one works but I only get 18kb out of a 270kb file: ( I have tried to increase the timeout)

set_time_limit(0);

$url = 'http://www.eample.com/file.zip';
$fp = fopen ('/downloads/file.zip', 'w+');

    $ch = curl_init($url);

    curl_setopt_array($ch, array(
    CURLOPT_URL            => $url,
    CURLOPT_BINARYTRANSFER => 1,
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_FILE           => $fp,
    CURLOPT_TIMEOUT        => 50,
    CURLOPT_USERAGENT      => 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)'
    ));

$results = curl_exec($ch);
if(curl_exec($ch) === false)
 {
  echo 'Curl error: ' . curl_error($ch);
 }

推荐答案

This one throw a error about a failed open stream：

This one throws an error about a failed open stream:

...
$enc = urlencode($url);
...

，因为你不需要urlencode那个已经正确编码的url。尝试：

I'd say no wonder, because you don't need to "urlencode" that url which is already properly encoded. Try:

$url = 'http://www.example.com/file.zip';
$file = "/downloads/file.zip";
$src = fopen($url, 'r');
$dest = fopen($file, 'w');
echo stream_copy_to_stream($src, $dest) . " bytes copied.\n";

请参阅 stream_copy_to_stream ^{­ Docs} 。如果您需要设置更多HTTP事件（如用户代理等），请使用 HTTP上下文选项 ^­ 。

See stream_copy_to_stream^­Docs. If you need to set more HTTP thingies like user-agent etc. use the HTTP Context Options^­Docs.

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