如何在RemoteServiceServlet中生成文件并将其发送给用户？ [英] How Can I generate a file in RemoteServiceServlet and send it to a user?

问题描述

也许我可以禁用RemoteServiceServlet响应序列化或使用返回ServletOutputStram的方法定义RemoteService接口？我希望不要在任何数据库中保存请求，以便在另一个请求中处理它。 解决方案

如果您想提供下载到用户，你可以这样做：

1. 编写另一个servlet，通过ServletResponse写出文件内容


2. 确保你有一个二进制头文件，并在那里提供文件名。


3. 在你的客户端中，制作一个< iframe ..> （这个widget类是 Frame ），并将它的url指向新的servlet。

由于二进制标题，您的浏览器现在将向用户提供另存为弹出窗口。这应该是全部。

Maybe I can disable RemoteServiceServlet response serialization or define RemoteService interface with method that returns ServletOutputStram? I would like not to save request in any database to file to process it in another request.

解决方案

If you want to provide a download to the user, you can do it like this:

1. Write another servlet which simply writes out the file content through the ServletResponse
2. Make sure you have a binary header and provide the filename in there, too.
3. In your client, make an <iframe ..> (The widget class for this is Frame) and point its url to your new servlet.

Due to the binary header your browser will now provide the user with a Save as.. popup. That should be all.

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