Lua中如何获取文件大小和删除文件? [英] How to get the file size and delete file in Lua?

问题描述

我在使用 Lua 获取文件大小时遇到​​问题.我正在创建一个函数方法，如果文件的文件大小为743 bytes，那么该文件将被删除.

I have problem in getting the size of the file using Lua. I am creating a function method that if the file size of the file is 743 bytes, then the file will be deleted.

这是我的代码:

local getDLFile = function(fileToDL)
            local path = system.pathForFile(fileToDL, system.DocumentsDirectory )
            local myFile = io.open( path, "w+b" ) 
            http.request{ 
                url = "http://www.testfile.com/"..fileToDL, 
                sink = ltn12.sink.file(myFile),
            }

            -- i don't know what is the syntax
            if myFile.size == 743 bytes then
                 myFile.delete
            end             

end

有人可以帮我处理我的案子吗?

Can anyone can help me about my case?

推荐答案

大小由 myFile:seek("end") 给出.

要删除文件，请使用os.remove(path).但先关闭文件.

To delete the file, use os.remove(path). But close the file first.

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