Flask，继续使用send_static_file获取404服务静态文件 [英] Flask, Keep getting 404 serving static files using send_static_file

问题描述

我遵循了如何在Flask中提供静态文件的说明，但仍然无法正常工作.

I followed the instructions from How to serve static files in Flask, but still couldn't get it working.

这是我的项目结构:

Project_path  
 |
 +--app
 |  |
 |  +--main.py
 +--static
    |
    +--js
       |
       +--jquery-1.11.2.min.js

这里是main.py:

@app.route('/js/<path:path>')
def serve_static(path):
    root_dir = os.path.dirname(os.getcwd())
    print(os.path.join(root_dir, 'static', 'js', path))
    return app.send_static_file(os.path.join(root_dir, 'static', 'js', path))

这里是index.html:

  ...
  <script type="text/javascript" src="/js/jquery-1.11.2.min.js"></script>
  ...

当我访问/时，我可以看到屏幕上打印的javascript文件的正确路径
是Project_path/static/js/jquery-1.11.2.min.js.

And when I visit /, I could see the correct path of javascript file printed on the screen
which is Project_path/static/js/jquery-1.11.2.min.js.

但我还是

127.0.0.1 - - [22/Dec/2014 11:26:30] "GET /js/jquery-1.11.2.min.js HTTP/1.1" 404 -

感谢您的帮助.

编辑
逐步完成send_static_file方法后，我发现发生了什么事.基本上，我不应该使用abspath作为参数，flask在send_static_file中有一个判断:

EDIT
After stepping through the send_static_file method, I find out what's going on. Basically, I shouldn't use abspath as argument, flask has a judgement in send_static_file:

if os.path.isabs(filename) or \
   filename == '..' or \
   filename.startswith('../'):
    raise NotFound()

而且由于我进入的filename是一个无礼的人，所以烧瓶会升起NotFound().
似乎应该传递给的是self.static_folder的相对路径(自身为<Flask 'main'>)，在我的项目中为Project_name/app/static.但是，我自己没有设置static_folder，这意味着flask认为静态文件夹应该在其中.

And since the filename I passed into is a abspath, flask raise NotFound().
It seems that what it supposed to be passed in is a relative path to self.static_folder(self is <Flask 'main'>), which, in my project, is Project_name/app/static. However, I didn't set static_folder myself which means flask thinks the static folder should be there.

我仍在试图找出解决方法.

I'm still trying to figure out what to do.

推荐答案

最后使它正常工作.使用 flask.send_from_directory

Finally got it working. use flask.send_from_directory

from flask import send_from_directory

@app.route('/js/<path:filename>')
def serve_static(filename):
    root_dir = os.path.dirname(os.getcwd())
    return send_from_directory(os.path.join(root_dir, 'static', 'js'), filename)

现在我很清楚，flask确实讨厌人们将app.py或在我的情况下main.py放到子目录中. 仅在烧瓶认为是静态文件夹的情况下才使用send_static_file，即与app.py在同一目录中名称为static的文件夹.

It is now clear to me that flask really hate people putting app.py or in my case main.py into a subdirectory. Use send_static_file only if your static folder is what flask thinks to be, i.e. a folder with name static in the same directory with app.py.

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