七牛用表单上传，返回null

Question

问题描述

服务器上用的是php，上传用的是form表单，流程是通过服务器获得uploadToken给html表单，然后上传，正常情况下不设置callbackUrl的时候是可以正常返回的，但是设置了之后就不返回了，直接返回一个Null.是不是七牛在设置异常回调地址后前端的访问就不回调了？

以下是代码

获得token

// 生成上传 Token
        $auth = $this->getauth();
        $bucket = 'demo';
        $policy = array(
               'callbackUrl' => 'http://120.27.44.143/notify',
            'callbackBody' => json_encode($body),
        );
        $token = $auth->uploadToken($bucket, "demo", 3600, $policy);
        // $token = $auth->uploadToken($bucket);
        Response::showResult(Response::OK_CODE,'',$token,Response::JSON);

----
获得auth的方法
private function getauth(){
        $accessKey = QiniuConst::AK;
        $secretKey = QiniuConst::SK;
        $auth = new Auth($accessKey, $secretKey);
        return $auth;
    }

表单上传

<form method="post" action="http://upload.qiniu.com/"
     enctype="multipart/form-data">
     <input  name="key" value="null">
     <input name="x:parentId" value="1044">
      <input name="token" type="hidden" value="AhjeVFPALrhk1eEq7be60YN1jrQxGSsFOuRI2a_L:1gimtjK6aI--XA7TDJUAEpaJqhY=:eyJjYWxsYmFja1VybCI6Imh0dHA6XC9cLzEyMC4yNy40NC4xNDNcL25vdGlmeSIsImNhbGxiYWNrQm9keSI6IntcImNvZGVcIjoxMDAsXCJkYXRhXCI6XCJoYWhhXCJ9IiwicmV0dXJuQm9keSI6IntcImtleVwiOiAkKGtleSksXCJwYXJlbnRJZFwiOiQocGFyZW50SWQpfSIsInNjb3BlIjoiZGVtbzpkZW1vIiwiZGVhZGxpbmUiOjE0ODc1ODk4MjgsInVwSG9zdHMiOlsiaHR0cDpcL1wvdXAucWluaXUuY29tIiwiaHR0cDpcL1wvdXBsb2FkLnFpbml1LmNvbSIsIi1IIHVwLnFpbml1LmNvbSBodHRwOlwvXC8xODMuMTM2LjEzOS4xNiJdfQ==">
      <input name="file" type="file" />
      <input type="submit" value="Submit" />
    </form>

Answer 1

找到问题了，如果设置了callback的话，就需要在异步回调中处理并返回结果，然后将结果以json的形式返回来就可以了