使用 grails 下载大文件 [英] Large file download using grails

问题描述

我正在开发一个 grails 应用程序，它具有文件共享功能.它将文件上传到服务器并允许用户从服务器下载文件.我为此使用了以下代码:

I am working on a grails application, it has a file sharing feature. It uploads files onto the server and allows user to download the file from server. I used the following code for this :

def file = new java.io.File(filePath)
response.setContentType( "application-xdownload")
response.setHeader("Content-Disposition", "attachment;filename=${fileName}")
response.getOutputStream() << new ByteArrayInputStream(file.getBytes())

此代码适用于小文件，但当文件大小增加时，即 >100MB，它给我以下错误:

This code works fine for small files but when the size of file is increased, i.e. >100MB, it gives me the following error :

java.lang.OutOfMemoryError: Java heap space

那么，我该怎么做才能使我的应用程序能够下载大文件?谢谢

So, what can I do to make my application be able to download large files ? Thanks

推荐答案

不是将文件加载到内存中，而是替换

Instead of loading the file into memory, replace

response.getOutputStream() << new ByteArrayInputStream(file.getBytes())

与:

file.withInputStream { response.outputStream << it }

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