php curl没有从youtube API获取数据[重复]

Question

可能重复：
Php - Debugging Curl

我正在使用 curl 从 youtube API 获取用户数据 代码是

    $url_userInfo =  'https://gdata.youtube.com/feeds/api/users/default?access_token=ya29.AHES6ZS7GMdZf91LbMtoOdhFSFOpTuHHT-t7pSggAp-tS0A;

print_r($url_userInfo);
$ch = curl_init($url_userInfo);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, '3');
$content = curl_exec($ch);
curl_close($ch);
print_r( $content);

如果我手动访问此 url，它会以 xml 形式显示数据。但$content 中没有可打印的内容。

代码有问题吗？

Answer 1

这实际上是一个 HTTPS 链接，即它使用 SSL，您需要获取 cacert.pem，并为 SSL 设置 cURL 以使其工作。

您可以获得证书here!

你可以这样设置：

$curl = curl_init();
$browser = $_SERVER['HTTP_USER_AGENT'];
$header[0] = "Accept: text/xml,application/xml,application/xhtml+xml,";
$header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$header[] = "Pragma: ";
curl_setopt($curl, CURLOPT_FAILONERROR,true);
curl_setopt($curl, CURLOPT_USERAGENT, $browser);
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_REFERER, 'http://www.google.com');
curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
curl_setopt($curl, CURLOPT_AUTOREFERER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl, CURLOPT_TIMEOUT, 20);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY); //needed for SSL
curl_setopt($curl, CURLOPT_CAINFO, "/scripts/cacert.pem"); //path to file
curl_setopt($curl, CURLOPT_URL, $url_userInfo);
$content = curl_exec($curl);
echo curl_error($curl);  //display errors under development
curl_close($ch);
print_r( $content );

使用适当的用户代理，并使用 SSL 和证书进行身份验证，就像浏览器一样。