Question

PHP / Apache2中的

file_get_contents正在从Facebook获取用户图片。直到最近才工作正常。现在，它在一分钟后总是超时，我的Apache2 error.log中出现此错误：

PHP警告：file_get_contents（https://graph.facebook.com/999999999/picture?width=200）：无法打开流：连接超时

这是代码（我最近添加了$ context以查看它是否正常工作。它没有）：

$context = stream_context_create(array('https' => array('header'=>'Connection: close\r\n')));
$fbprofileimage = file_get_contents('https://graph.facebook.com/'.$id.'/picture?width=100',false,$context);

我尝试过curl但它不起作用：

$curl_handle=curl_init();
curl_setopt($curl_handle, CURLOPT_URL,'http://graph.facebook.com/'.$id.'/picture?width=100');
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'StockBet');
$fbprofileimage = curl_exec($curl_handle);
curl_close($curl_handle);

我发现了file_get_contents＆amp; curl将适用于某些网站，但不适用于其他网站。

以下作品：

$context = stream_context_create(array('https' => array('header'=>'Connection: close\r\n')));
$fbprofileimage = file_get_contents('https://fm.cnbc.com/applications/cnbc.com/resources/img/editorial/2017/08/03/104629909-GettyImages-630953738-bitcoin.240x160.jpg?v=1501760634',false,$context);

$curl_handle=curl_init();
curl_setopt($curl_handle, CURLOPT_URL,'https://fm.cnbc.com/applications/cnbc.com/resources/img/editorial/2017/08/03/104629909-GettyImages-630953738-bitcoin.240x160.jpg?v=1501760634');
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'StockBet');
$fbprofileimage = curl_exec($curl_handle);
curl_close($curl_handle);

以上代码也可以获取以下图像文件：

上述代码无法获取以下图像文件：

有谁知道为什么我可以从某些网站获取图像文件而不是其他网站？

Answer 1

出于我的目的，即从Facebook获取用户图片，我使用以下代码使其工作：

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  // need confirmed
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);  // need confirmed.  I think this is key, as Facebook redirects to another URL and we need to follow
        //curl_setopt($ch, CURLOPT_ENCODING,"");  // not needed confirmed
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 1);  // need confirmed
        curl_setopt($ch, CURLOPT_TIMEOUT,1);  // need confirmed
        curl_setopt($ch, CURLOPT_FAILONERROR,true);  // not needed confirmed
        //curl_setopt($ch, CURLOPT_VERBOSE, true);  // not needed confirmed
        //curl_setopt($ch, CURLINFO_HEADER_OUT, true);  // not needed confirmed
        curl_setopt($ch, CURLOPT_HEADER, true);  // need confirmed
        $fbprofileimage = curl_exec($ch);   
        if (curl_errno($ch)){
            echo 'Retreive Base Page Error: ' . curl_error($ch);
        }
        else {
          //$info = rawurldecode(var_export(curl_getinfo($ch),true));
         // Get the cookies:
          $skip = intval(curl_getinfo($ch, CURLINFO_HEADER_SIZE)); 
          //$responseHeader= substr($fbprofileimage,0,$skip);
          $fbprofileimage= substr($fbprofileimage,$skip);    // need confirmed
          //echo "HEADER: $responseHeader\n";   // causes error
          //echo "\n\nINFO: $info\n\nDATA: $fbprofileimage";  // causes error
        }

我认为关键是：

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

因为获取https://graph.facebook.com/999999999/picture?width=200（其中999999999是用户的ID），Facebook会重定向到另一个网址。

PHP file_get_contents＆amp; curl可以从某些网站获取图像文件，但不能获取其他网站。为什么？

1 个答案: