以下是服务代码,它首先去服务器获取签名(我知道那部分是好的)然后尝试POST一切.

myServices.factory('s3',function($http) {
    var service = {};

    service.upload = function(fileName) {

        return $http(
            {
                method:"POST",url: "sign",data: { "fileName": fileName }
            }
        ).then(
            function(result) {
                // success
                //resolve the promise as the data
                var data = result.data;
                var url = "https://" + data.bucket + ".s3.amazonaws.com/";

                return $http.post(url,{
                    "key": data.key,"AWSAccessKeyId": data.awsKey,"acl": data.acl,"policy": data.policy,"signature": data.signature,"Content-Type": "image/jpeg","success_action_redirect": "http://localhost:3000/s3Uploaded"
            }).then(
            function(response) {
                // success
                console.log("s3.upload,success: ");
                console.log(response);
            },function(response) { 
                // Failed
                console.log("s3.Upload,fail: ");
                console.log(response);
            }
        );

    },function(response) { 
            // Failed
            console.log("s3.sign,fail: ");
            console.log(response);
        }
    );
};

return service;
});

我究竟做错了什么？