php - 使用 cURL 限制下载带宽

Question

我一直在尝试用 PHP 限制带宽。我无法使用 PHP 限制下载速率。

你能帮忙吗？

function total_filesize($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "$url");
    curl_setopt($ch, CURLINFO_SPEED_DOWNLOAD,12); //ITS NOT WORKING! 
    curl_setopt($ch, CURLOPT_USERAGENT,
            "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.11) ".
            "Gecko/20071127 Firefox/2.0.0.11");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_NOBODY, true);


    $chStore = curl_exec($ch);
    $chError = curl_error($ch);
    $chInfo = curl_getinfo($ch);
    curl_close($ch);
    return $size = $chInfo['download_content_length'];
}

function __define_url($url) {
    $basename = basename($url);
    Define('filename',$basename);
    $define_file_size = total_filesize($url);
    Define('filesizes',$define_file_size);
}

function _download_file($url_file) { 
    __define_url($url_file);

    // $range = "50000-60000";
    $filesize = filesizes;
    $file = filename; 
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="'.$file.'"'); 
    header('Content-Transfer-Encoding: binary');
    header("Content-Length: $filesize");
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,"$url_file");
    curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
    //  curl_setopt($ch, CURLOPT_RANGE,$range);

    curl_exec($ch);
    curl_close($ch);
}
_download_file('http://rarlabs.com/rar/wrar393.exe'); 

Answer 1

CURLOPT_MAX_RECV_SPEED_LARGE是您想要的选项。

在 curl 7.15.5 中添加。自 PHP 5.4.0

起出现在 PHP/CURL 中