确定Ruby中的文件类型 [英] Determine file type in Ruby

问题描述

一个可靠如何确定文件的类型?文件扩展名分析是不可接受的.必须有一个类似于UNIX file(1)命令的rubyesque工具吗?

How does one reliably determine a file's type? File extension analysis is not acceptable. There must be a rubyesque tool similar to the UNIX file(1) command?

这与MIME或内容类型有关，与文件系统分类(例如目录，文件或套接字)无关.

This is regarding MIME or content type, not file system classifications, such as directory, file, or socket.

推荐答案

与libmagic绑定的红宝石绑定可以满足您的需求.它可以作为名为 ruby​​-filemagic :

There is a ruby binding to libmagic that does what you need. It is available as a gem named ruby-filemagic:

gem install ruby-filemagic

需要libmagic-dev.

文档似乎有些薄，但这应该可以帮助您入门:

The documentation seems a little thin, but this should get you started:

$ irb 
irb(main):001:0> require 'filemagic' 
=> true
irb(main):002:0> fm = FileMagic.new
=> #<FileMagic:0x7fd4afb0>
irb(main):003:0> fm.file('foo.zip') 
=> "Zip archive data, at least v2.0 to extract"
irb(main):004:0> 

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