html5表单使用阿里云 oss直传
使用PostObject上传文件
前台
后台
public function gmt_iso8601($time) {
$dtStr = date("c", $time);
$mydatetime = new \DateTime($dtStr);
$expiration = $mydatetime->format(\DateTime::ISO8601);
$pos = strpos($expiration, '+');
$expiration = substr($expiration, 0, $pos);
return $expiration."Z";
}
public function getSign()
{
$id= ''; //AccessKeyID
$key= ''; //AccessKeySecret
$host = '';//Bucket.Endpoint(访问域名) http://test-bucket.oss-cn-hangzhou.aliyuncs.com
$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 = $this->gmt_iso8601($end);
$dir = 'user-dir/';
//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;
//这里默认设置是２０２０年.注意了,可以根据自己的逻辑,设定expire 时间.达到让前端定时到后面取signature的逻辑
$arr = array('expiration'=>$expiration,'conditions'=>$conditions);
//echo json_encode($arr);
//return;
$policy = json_encode($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;
//这个参数是设置用户上传指定的前缀
$response['dir'] = $dir;
return response()->json($response);
}
