使用 curl 下载大文件

php download curl

2022-08-30 07:53:03

我需要使用 curl 下载远程文件。

以下是我拥有的示例代码：

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$st = curl_exec($ch);
$fd = fopen($tmp_name, 'w');
fwrite($fd, $st);
fclose($fd);

curl_close($ch);

但它无法处理大文件，因为它首先读取内存。

是否可以将文件直接流式传输到磁盘？

答案 1

<?php
set_time_limit(0);
//This is the file where we save the    information
$fp = fopen (dirname(__FILE__) . '/localfile.tmp', 'w+');
//Here is the file we are downloading, replace spaces with %20
$ch = curl_init(str_replace(" ","%20",$url));
// make sure to set timeout to a high enough value
// if this is too low the download will be interrupted
curl_setopt($ch, CURLOPT_TIMEOUT, 600);
// write curl response to file
curl_setopt($ch, CURLOPT_FILE, $fp); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
// get curl response
curl_exec($ch); 
curl_close($ch);
fclose($fp);
?>

答案 2

我使用这个方便的功能：

通过以4094字节的步骤下载它，它不会填满您的内存

function download($file_source, $file_target) {
    $rh = fopen($file_source, 'rb');
    $wh = fopen($file_target, 'w+b');
    if (!$rh || !$wh) {
        return false;
    }

    while (!feof($rh)) {
        if (fwrite($wh, fread($rh, 4096)) === FALSE) {
            return false;
        }
        echo ' ';
        flush();
    }

    fclose($rh);
    fclose($wh);

    return true;
}

用法：

     $result = download('http://url','path/local/file');

然后，您可以检查以下各项是否一切正常：

     if (!$result)
         throw new Exception('Download error...');