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From "zhipengxu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IO-386) FileUtils.doCopyFile uses different methods to check the file sizes
Date Mon, 11 Dec 2017 11:00:00 GMT

    [ https://issues.apache.org/jira/browse/IO-386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16285761#comment-16285761
] 

zhipengxu commented on IO-386:
------------------------------

Can we save the length before copy really start and compare it with the new generated file
? 
Does it really cannot be fixed?

> FileUtils.doCopyFile uses different methods to check the file sizes
> -------------------------------------------------------------------
>
>                 Key: IO-386
>                 URL: https://issues.apache.org/jira/browse/IO-386
>             Project: Commons IO
>          Issue Type: Bug
>            Reporter: Sebb
>            Priority: Minor
>
> FileUtils.doCopyFile uses FileChannel.size() to measure the input file length at the
start, and File.length() to compare the lengths at the end.
> This is inconsistent.
> If there is a good reason for this it should be documented, otherwise it should probably
use the same method for all the checks.
> [Note: is FileChannel.size() accurate if the file has not been flushed?]



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