Question

我正在尝试解析此网址

https://graph.facebook.com/4/picture?width=378&height=378

但它会将我重定向到另一个链接：

https://z-n.ak.fbcdn.net/profile.ak/hprofile-ak-xfp1/v/t1.0-1/p480x480/10390028_10102210419817761_5871103530921178170_n.jpg?oh=9d44ae6370a6481a6e4e5c42d7850e2a&oe=56C84426&gda=1455827889_efa267e73eea3dd27aa02526c323a1e6

所以问题是我想实现代码以使用第一个链接，当它重定向到第二个链接时，解析第二个我需要从第二个URL获取内容，最佳做法是什么？

提前感谢您的帮助

Answer 1

使用CURL：

$url = 'https://graph.facebook.com/4/picture?width=378&height=378';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); // follow the redirects
curl_setopt($ch, CURLOPT_HEADER, false); // no needs to pass the headers to the data stream
curl_setopt($ch, CURLOPT_NOBODY, true); // get the resource without a body
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // accept any server certificate
curl_exec($ch);

// get the last used URL
$lastUrl = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);

curl_close($ch);

echo $lastUrl;

Answer 2

您可以使用此代码：

    <?php
$url = "https://graph.facebook.com/4/picture?width=378&height=378";
$content = get_url_data($url);
$code = $content['code'];
$headers_array = $content['headers_array'];
$redirect_url = '';

if($code == 301  ||  $code == 302){
    $headers = $content['headers_array'];
    if(isset($headers['Location'])){
        $redirect_url = $headers['Location'][0];
    }
}
echo 'Redirected url:' . $redirect_url;



function get_url_data($url, $timeout = 5){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,            $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_TIMEOUT,  $timeout );
    curl_setopt($ch, CURLOPT_AUTOREFERER, true);
    curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    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");

    $response = curl_exec($ch);
    $header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    $header = substr($response, 0, $header_size);
    $body = substr($response, $header_size);
    $headers  = explode( "\n", $header );

    $code = 0;
    if(isset($headers[0])){
        if(preg_match('/[0-9]{3}/', $headers[0], $matches)){
            $code = $matches[0];
        }
    }

    $headers_array = [];
    foreach($headers as $h){
        $index = strpos($h, ":");
        if($index !== false){
            $key = trim(substr($h, 0, $index));
            $value = trim(substr($h, ($index+1)));
            $headers_array[$key] = [$value];
        }
    }

    return ['headers' => $headers, 'body' => $body, 'code' => $code, 'headers_array' => $headers_array];
}

Answer 3

尝试使用get_headers功能

<?  
    $link = 'https://graph.facebook.com/4/picture?width=378&height=378';
    $headers = get_headers($link);
    foreach ($headers as $header) {
       if (preg_match('/^Location:\s(.*)/', $header, $out)) {
            echo $out[1];
            break;
       }
    }

如何解析重定向到另一个网址的https网址

3 个答案: