使cURL在收到数据时写入数据

Question

我有以下PHP代码,我在这里找到:

function download_xml()
{
    $url = 'http://tv.sygko.net/tv.xml';

    $ch = curl_init($url);
    $timeout = 5;

    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

    $data = curl_exec($ch);

    echo("curl_exec was succesful"); //This never gets called

    curl_close($ch);
    return $data;
}

$my_file = 'tvdata.xml';
$handle = fopen($my_file, 'w');
$data = download_xml();
fwrite($handle, $data);

我要做的是在指定的URL下载xml并将其保存到磁盘.然而,一旦大约80%完成停止,并且在echo通话后从未到达curl_exec通话.我不确定为什么,但我相信这是因为内存不足.因此,我想问一下,每次下载4kb时,是否可以将curl写入文件.如果这是不可能的,有人知道一种方法来获取存储在url下的xml文件下载并使用php存储在我的磁盘上吗？

非常感谢,BEN.

编辑:这是现在的代码,它不起作用.它将数据写入文件,但仍然只占文档的80%左右.也许不是因为它超过记忆而是其他原因？我真的不敢相信将文件从URL复制到光盘很难...

    <?

$url = 'http://tv.sygko.net/tv.xml';
$my_file = fopen('tvdata.xml', 'w');

$ch = curl_init($url);
$timeout = 300;

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FILE, $my_file);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_BUFFERSIZE, 4096);

curl_exec($ch) OR die("Error in curl_exec()");

echo("got to after curl exec");

fclose($my_file);
curl_close($ch);

    ?>

Answer 1

这是一个完整的例子:

public function saveFile($url, $dest) {

        if (!file_exists($dest))
                touch($dest);

        $file = fopen($dest, 'w');
        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, 'progressCallback');
        curl_setopt($ch, CURLOPT_BUFFERSIZE, (1024*1024*512));
        curl_setopt($ch, CURLOPT_NOPROGRESS, FALSE);
        curl_setopt($ch, CURLOPT_FAILONERROR, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_TIMEOUT, 15);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
        curl_setopt($ch, CURLOPT_FILE, $file);

        curl_exec($ch);
        curl_close($ch);

        fclose($file);
}
?>

秘诀在于将CURLOPT_NOPROGRESS设置为FALSE,然后,CURLOPT_BUFFERSIZE将为每个到达的CURLOPT_BUFFERSIZE个字节生成回调报告.值越小,报告的频率越高.这还取决于您的下载速度等,因此不要指望每隔X秒报告一次,因为它将报告接收/传输的每个X字节.