如何在 Ruby 中遍历内存中的 zip 文件 [英] How to iterate through an in-memory zip file in Ruby
问题描述
我正在编写一个单元测试,其中一个正在返回一个 zip 文件,我想检查这个 zip 文件的内容,从中获取一些值,并将这些值传递给下一个测试.
I am writing a unit test, and one of them is returning a zip file and I want to check the content of this zip file, grab some values from it, and pass the values to the next tests.
我正在使用 Rack Test,所以我知道我的 zip 文件的内容在 last_response.body
中.我已经浏览了 RubyZip 的文档,但它似乎总是在期待一个文件.由于我正在运行单元测试,我更喜欢在内存中完成所有操作,以免测试 zip 文件污染任何文件夹(如果可能).
I'm using Rack Test, so I know the content of my zip file is inside last_response.body
. I have looked through the documentation of RubyZip but it seems that it's always expecting a file. Since I'm running a unit test, I prefer to have everything done in the memory as not to pollute any folder with test zip files, if possible.
推荐答案
请参阅@bronson 的答案,以获取使用较新的 RubyZip API 的此答案的最新版本.
See @bronson’s answer for a more up to date version of this answer using the newer RubyZip API.
您链接的 Rubyzip 文档看起来有点旧.最新版本 (0.9.9) 可以处理IO
对象,因此您可以使用 StringIO(稍作调整).
The Rubyzip docs you linked to look a bit old. The latest release (0.9.9) can handle IO
objects, so you can use a StringIO (with a little tweaking).
即使 api 会接受 IO
,它似乎仍然假设它是一个文件并尝试在它上面调用 path
,所以第一个猴子补丁 StringIO
添加一个 path
方法(它实际上不需要做任何事情):
Even though the api will accept an IO
, it still seems to assumes it’s a file and tries to call path
on it, so first monkey patch StringIO
to add a path
method (it doesn’t need to actually do anything):
require 'stringio'
class StringIO
def path
end
end
然后您可以执行以下操作:
Then you can do something like:
require 'zip/zip'
Zip::ZipInputStream.open_buffer(StringIO.new(last_response.body)) do |io|
while (entry = io.get_next_entry)
# deal with your zip contents here, e.g.
puts "Contents of #{entry.name}: '#{io.read}'"
end
end
一切都将在内存中完成.
and everything will be done in memory.
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