4系のAndroid端末でレスポンスの検証設定を有効にし、ファイル登録などを行うとエラーが発生する

[n0guch1]

不具合の概要(Description of bug)

• SDKのバージョン(SDK version)
  • 2.2.3
• 不具合が発生した環境(Environment requirement)
  • Android - 4.2.2 （5.1.1では再現しない）
• 不具合を再現させる手順・サンプルコード(Step for Reproduce bug / Sample code)
  • FileStoreSampleのPOSTボタンおよびGETボタンの処理を実施
• エラーメッセージ(Error messages)
  • Authentication error by respose signature incorrect.

[hocnguyen]

I tested on Android version 4.2.2 (API 17) . But I upload file and get content file success, no error . My code :

NCMBAcl acl = new NCMBAcl();
        acl.setPublicWriteAccess(true);
        acl.setPublicReadAccess(true);
        byte[] data = "Hello,NCMB".getBytes();
        NCMBFile file = new NCMBFile("Hello.txt", data,acl);
        file.saveInBackground(new DoneCallback() {
            @Override
            public void done(NCMBException e) {
                if (e != null) {
                    //失敗
                } else {
                    //成功
                }
            }
        });

NCMBFile file = new NCMBFile("Hello.txt");
        file.fetchInBackground(new FetchFileCallback() {
            @Override
            public void done(byte[] data, NCMBException e) {
                if (e != null) {
                    //失敗
                } else {
                    //成功
                }
            }
        });

Please help me confirm about that.

[ndyuya]

Did you enable the response validation?

NCMB.enableResponseValidation(true);

[hocnguyen]

@ndyuya さん It has error when we enable the response validation. But only POST method, Get method is no error.

[hocnguyen]

@ndyuya さん、 I see we have 2 results response data with Android 4.2.2 and 5.1.1 at responseSignatureCheck() of NCMBConnection file. Response data Android 4.2.2 :

{"createDate":"2016-12-13T07:03:21.574Z","fileName":"Hello.txt"}

Response data Android 5.1.1

{"fileName":"Hello.txt","createDate":"2016-12-13T07:06:11.422Z"}

If we change format of return data response of Android 4.2.2 similar with Android 5.1.1. It is ok. No error. So in this is error, we need to fix return data from mbaas server for Android version 4.2.2. Is it right?

[ndyuya]

res.responseData in NCMBConnection.java:L183 is JSONObject type that deserialized HTTP response body. ( NCMBResponse.java:L24 ) It is serialized again. res.responseData.toString () at same line. I think ,it(re-serialization) may be the cause ,not server response.

[hocnguyen]

yes. Now I see it return 2 results different when parse JSON at NCMBResponse.java

responseData = new JSONObject(new String(sb));

• Android 5.1.1 : It is ok, keep position of key and value : {"fileName":"Hello.txt","createDate":"2016-12-13T07:06:11.422Z"}
• Android 4.2.2 : It will be sort to : {"createDate":"2016-12-13T07:03:21.574Z","fileName":"Hello.txt"}

I think the cause from here.