java - 在 Google 应用引擎中读取上传的文件

Question

我有一个 GAE 应用程序 (Java)，我必须从外部文件填充我的数据存储。使用 localhost 它工作正常。问题是在部署它时我总是得到

错误：服务器错误

服务器遇到错误，无法完成您的请求。如果问题仍然存在，请报告您的问题并提及此错误消息和导致它的查询。

这是我的路径文件“war\WEB-INF\test.data”

问题：本地访问和远程访问之间是否有任何变化？有什么帮助吗？

Answer 1

We need to understand what you are executing to populate the datastore from the local file. Here are some points:

1. Assuming that you have uploaded the file in WEB-INF folder with name test.data, your file path should be `WEB-INF/test.data'
2. Are you running the code to load data via some url e.g. http://yorappid.appspot.com/loaddata or something like that? If yes, chances are that your code is taking much longer to process than the 60 seconds hard limit that AppEngine places on completing HTTP Requests. So that could be the problem where you request is not getting complete.
3. I suggest that if point 2 above is the case, please move your code to a Cron Job. They have a limit of 10 minutes and it might sufficient to load up your data. I am not sure about the amount of data that you plan to load but 10 minutes would be more than enough to load up a sufficiently large amount of data.

Hope this helps.