$id = 'AccessKeyId'; // 请填写您的AccessKeyId。
$key = 'AccessKeySecret'; // 请填写您的AccessKeySecret。
// $host的格式为 bucketname.endpoint,请替换为您的真实信息。
$host = 'https://xxxx.oss-cn-beijing.aliyuncs.com';
// $callbackUrl为上传回调服务器的URL,请将下面的IP和Port配置为您自己的真实URL信息。
$callbackUrl = '/callback.php';
$dir = 'user-dir-prefix/'; // 用户上传文件时指定的前缀。
$callback_param = array(
'callbackUrl' => $callbackUrl,
'callbackBody' => 'filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}',
'callbackBodyType' => "application/x-www-form-urlencoded"
$callback_string = json_encode($callback_param);
$base64_callback_body = base64_encode($callback_string);
$now = time();
$expire = 30; //设置该policy超时时间是10s. 即这个policy过了这个有效时间,将不能访问。
$end = $now + $expire;
$expiration = gmt_iso8601($end);
//最大文件大小.用户可以自己设置
$condition = array(0 => 'content-length-range', 1 => 0, 2 => 1048576000);
$conditions[] = $condition;
// 表示用户上传的数据,必须是以$dir开始,不然上传会失败,这一步不是必须项,只是为了安全起见,防止用户通过policy上传到别人的目录。
$start = array(0 => 'starts-with', 1 => '$key', 2 => $dir);
$conditions[] = $start;
$arr = array('expiration' => $expiration, 'conditions' => $conditions);
$policy = json_encode($arr);
$base64_policy = base64_encode($policy);
$string_to_sign = $base64_policy;
$signature = base64_encode(hash_hmac('sha1', $string_to_sign, $key, true));
$response = array();
$response['accessid'] = $id;
$response['host'] = $host;
$response['policy'] = $base64_policy;
$response['signature'] = $signature;
$response['expire'] = $end;
$response['callback'] = $base64_callback_body;
$response['dir'] = $dir; // 这个参数是设置用户上传文件时指定的前缀。
echo json_encode($response);
以下是回调文件的php代码
// 1.获取OSS的签名header和公钥url header
$authorizationBase64 = "";
$pubKeyUrlBase64 = "";
* 注意:如果要使用HTTP_AUTHORIZATION头,你需要先在apache或者nginx中设置rewrite,以apache为例,修改
* 配置文件/etc/httpd/conf/httpd.conf(以你的apache安装路径为准),在DirectoryIndex index.php这行下面增加以下两行
RewriteEngine On
RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization},last]
if (isset($_SERVER['HTTP_AUTHORIZATION']))
$authorizationBase64 = $_SERVER['HTTP_AUTHORIZATION'];
if (isset($_SERVER['HTTP_X_OSS_PUB_KEY_URL']))
$pubKeyUrlBase64 = $_SERVER['HTTP_X_OSS_PUB_KEY_URL'];
if ($authorizationBase64 == '' || $pubKeyUrlBase64 == '')
header("http/1.1 403 Forbidden");
exit();
// 2.获取OSS的签名
$authorization = base64_decode($authorizationBase64);
// 3.获取公钥
$pubKeyUrl = base64_decode($pubKeyUrlBase64);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $pubKeyUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
$pubKey = curl_exec($ch);
if ($pubKey == "")
//header("http/1.1 403 Forbidden");
exit();
// 4.获取回调body
$body = file_get_contents('php://input');
// 5.拼接待签名字符串
$authStr = '';
$path = $_SERVER['REQUEST_URI'];
$pos = strpos($path, '?');
if ($pos === false)
$authStr = urldecode($path)."\n".$body;
$authStr = urldecode(substr($path, 0, $pos)).substr($path, $pos, strlen($path) - $pos)."\n".$body;
// 6.验证签名
$ok = openssl_verify($authStr, $authorization, $pubKey, OPENSSL_ALGO_MD5);
if ($ok == 1)
header("Content-Type: application/json");
$data = array("Status"=>"Ok");
echo json_encode($data);
//header("http/1.1 403 Forbidden");
exit();
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