小编zee*_*ari的帖子

根据Google App Engine灵活的文档,对于任何传入请求,作为应用程序的服务,App Engine会向所有请求添加以下标头:

X-AppEngine-Country  as an ISO 3166-1 alpha-2 country code
X-AppEngine-Region    as an ISO-3166-2 standard
X-AppEngine-City
X-AppEngine-CityLatLong
X-Cloud-Trace-Context
X-Forwarded-For: [CLIENT_IP(s)], [global forwarding rule IP]
X-Forwarded-Proto [http | https]

无论如何,我可以使用Java从请求标头使用上述信息获得时区偏移量？

我正在使用Blueimp/jQuery-File-Upload进行多个图像上传,我把sql语句放在数据库中为blueimp/jQuery-File-Upload 存储图像文件名？

我正在使用 Google 服务帐户使用以下代码从服务端获取访问令牌。但我得到的访问令牌为空。相同的返回令牌将用于在客户端为相同的 userEmailId 打开 Google 文件选择器。请建议我在代码中做错了什么。

private static final List SCOPE = Arrays.asList("https://www.googleapis.com/auth/drive");

public String getAccessToken(String SERVICE_ACCOUNT_EMAIL, String SERVICE_ACCOUNT_PKCS12_FILE_PATH,String userEmailId){
                try {
                    HttpTransport httpTransport = new NetHttpTransport();
                    JsonFactory jsonFactory = new JacksonFactory();
                    GoogleCredential credential = new GoogleCredential.Builder()
                                                    .setTransport(httpTransport)
                                                    .setJsonFactory(jsonFactory)
                                                    .setServiceAccountId(SERVICE_ACCOUNT_EMAIL)
                                                    .setServiceAccountScopes(SCOPE)
                                                    .setServiceAccountUser(userEmailId)
                                                    .setServiceAccountPrivateKeyFromP12File(new java.io.File(SERVICE_ACCOUNT_PKCS12_FILE_PATH))
                                                    .build();

                    credential.getRefreshToken();
                    return credential.getAccessToken();
                } catch (Exception e) {
                    // TODO: handle exception
                    log.severe("Error while getting Drive  credentilas. 5.0"+ e.getMessage());
                    return null;
                }
            }