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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);

}