Python - 如何使用unicode文件名从文件系统发送文件？ [英] Python - how to send file from filesystem with a unicode filename?

问题描述

所以我使用Flask来提供一些文件。我最近把这个项目从Python 3降级到了Python 2.7，所以它可以和更多的扩展一起工作，并遇到了我以前没有遇到的问题。我尝试从文件系统提供日文文件名的文件，当我尝试返回send_from_directory（new_folder_path，文件名，as_attachment = True）
我得到 UnicodeEncodeError：'ascii'编解码器不能对位置15-20中的字符进行编码：序号不在范围内（128）。在 quote_header_value = str（value）（这是一个werkzeug事物）。
我有模板设置显示页面上的文件名，只要在{{文件名}}在HTML中，它显示得很好，所以我假设它以某种方式从文件系统读取名称？只有当我尝试send_from_directory所以用户可以下载它会抛出这个错误。我尝试了一堆 .encode（'utf-8'）和 .decode（'utf-8'）的组合。对此感到非常沮丧。在Python 3中，所有东西都是无缝工作的，因为所有的东西都被当作unicode来处理，而寻找解决这个问题的方法带来了一些结果，似乎我需要一个程序来包装我的头。有没有人有这个问题的解决办法？
谢谢。

解决方案

好了，在引擎盖下摔跤了一段时间之后我就修好了，不得不修改一些werkzeug东西的来源。在http.py中，我用 unicode（value）替换了 str（value）在http.py和datastructures.py中都带有utf-8的latin-1。它解决了这个问题，文件在最新的Firefox和Chrome中都得到了很好的下载。正如我之前所说，我宁愿不必修改我使用的库的来源，因为这是在不同的系统上部署/测试时很痛苦，所以如果任何人有更好的解决这个问题，请分享。我见过一些人建议只是使URL的文件名的一部分，但我不能这样做，因为我需要保持我的网址简单和干净。

So I am using Flask to serve some files. I recently downgraded the project from Python 3 to Python 2.7 so it would work with more extensions, and ran into a problem I did not have before. I am trying to serve a file from the filesystem with a Japanese filename, and when I try return send_from_directory(new_folder_path, filename, as_attachment=True) I get UnicodeEncodeError: 'ascii' codec can't encode characters in position 15-20: ordinal not in range(128). in quote_header_value = str(value) (that is a werkzeug thing). I have template set to display the filename on the page by just having {{filename}} in the HTML and it is displaying just fine, so I'm assuming it is somehow reading the name from the filesystem? Only when I try send_from_directory so the user can download it does it throw this error. I tried a bunch of combinations of .encode('utf-8') and.decode('utf-8')`none of which worked at all and I'm getting very frustrated with this. In Python 3 everything just worked seamlessly because everything was treated as unicode, and searching for a way to solve this brought up results that it seems I would need a degree in compsci to wrap my head around. Does anyone have a fix for this? Thanks.

解决方案

OK, after wrestling with it under the hood for a while I fixed it, but not in a very elegant way, I had to modify the source of some werkzeug things. In "http.py", I replaced str(value) with unicode(value), and replaced every instance of "latin-1" with "utf-8" in both http.py and datastructures.py. It fixed the problem, file gets downloaded fine in both the latest Firefox and Chrome. As I said before, I would rather not have to modify the source of the libraries I am using because this is a pain when deploying/testing on different systems, so if anyone has a better fix for this please share. I've seen some people recommend just making the filename part of the URL but I cannot do this as I need to keep my URLs simple and clean.

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