如何从类似文件的对象中python mimetypes.guess_type [英] how to python mimetypes.guess_type from a file-like object

问题描述

>>> mimetypes.guess_type('picture.jpg')
('image/jpeg', None)

现在我有一个类似文件的对象(例如stingIO)， 哪些内容是图像数据

Now I have a file-like object, (eg. stingIO), which content is image's data

如何从类似文件的对象中检测出模仿类型

How can i detect the mimetypes from a file-like object

推荐答案

python mimetype标准模块将文件名映射为mime-type，反之亦然.要使用它，您需要一个文件名或一个mime类型，在这种情况下，它将带给您可能的文件扩展名.

The python mimetype standard module maps filenames to mime-types and vice versa. To use it, you'll need a filename or a mime-type, in which case it'll give you back a possible file extension.

它不会/不会根据文件的内容确定MIME类型.您需要另一种工具来执行此操作. unix file命令背后的库Libmagic是这些工具之一. filemagic模块( https://pypi.python.org/pypi/filemagic/1.6)是libmagic的python接口.

It won't/doesn't determine the mime-type based on a file's contents. You need another type of tool to do that. Libmagic, the library behind the unix file command, is one of those tools. The filemagic module (https://pypi.python.org/pypi/filemagic/1.6) is a python interface to libmagic.

import urllib2
import magic

img_data = urllib2.urlopen('https://www.google.com/images/srpr/logo11w.png').read()
# You can add flags 
# magic.Magic(flags=magic.MAGIC_MIME_TYPE) for take "/image/png"
m = magic.Magic()
print m.id_buffer(img_data)
m.close()

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