Python Flask，使用 send_static_file 继续获取 404 服务静态文件
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Flask, Keep getting 404 serving static files using send_static_file
提问by laike9m
I followed the instructions from How to serve static files in Flask, but still couldn't get it working.
我按照如何在 Flask 中提供静态文件的说明进行操作，但仍然无法正常工作。
Here's my project structure:
这是我的项目结构：
Project_path
|
+--app
| |
| +--main.py
+--static
|
+--js
|
+--jquery-1.11.2.min.js
Here's main.py:
这是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))
Here's index.html:
这是index.html：
...
<script type="text/javascript" src="/js/jquery-1.11.2.min.js"></script>
...
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.
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.
But still, I got
但是，我还是得到了
127.0.0.1 - - [22/Dec/2014 11:26:30] "GET /js/jquery-1.11.2.min.js HTTP/1.1" 404 -
Any help is appreciated.
任何帮助表示赞赏。
EDIT
After stepping through the send_static_filemethod, I find out what's going on. Basically, I shouldn't use abspath as argument, flask has a judgement in send_static_file:
编辑
在逐步完成该send_static_file方法后，我发现了发生了什么。基本上，我不应该使用 abspath 作为参数，flask 有一个判断send_static_file：
if os.path.isabs(filename) or \
filename == '..' or \
filename.startswith('../'):
raise NotFound()
And since the filenameI 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_foldermyself which means flask thinks the static folder should be there.
由于filenameI 传入的是一个 abspath，因此 flask raise NotFound()。
似乎它应该传入的是self.static_folder(self is <Flask 'main'>)的相对路径，在我的项目中，它是Project_name/app/static. 但是，我没有设置static_folder自己，这意味着 Flask 认为静态文件夹应该在那里。
I'm still trying to figure out what to do.
我仍在努力弄清楚该怎么做。
采纳答案by laike9m
Finally got it working. use flask.send_from_directory
终于让它工作了。用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)
It is now clear to me that flask really hate people putting app.pyor in my case main.pyinto a subdirectory. Use send_static_fileonly if your static folder is what flask thinks to be, i.e. a folder with name staticin the same directory with app.py.
现在我很清楚，flask 真的很讨厌人们将app.py或在我的情况下main.py放入子目录。仅当您的静态文件夹是flask 认为的文件夹时才使用send_static_file，即名称static与 app.py 位于同一目录中的文件夹。
回答by Antoine Catton
You forgot to add 'static'in the last os.path.joinin the returnclause.
您忘记在子句'static'的最后添加。os.path.joinreturn
回答by Burhan Khalid
All you need to do is, pass the static_folderparameterto the initiator:
您需要做的就是将static_folder参数传递给启动器：
static_url_path– can be used to specify a different path for the static files on the web. Defaults to the name of thestatic_folderfolder.
static_folder– the folder with static files that should be served at static_url_path. Defaults to the 'static' folder in the root path of the application.
static_url_path– 可用于为网络上的静态文件指定不同的路径。默认为static_folder文件夹的名称。
static_folder– 包含应该在 static_url_path 提供的静态文件的文件夹。默认为应用程序根路径中的“静态”文件夹。
app = Flask(__name__, static_folder=os.path.abspath('/foo/bar/zoo/'))
Now, flask will look for a directory named staticin /foo/bar/zoofrom where to serve static files. You only use send_from_directoryif you are serving mediafiles which may not be in the same location as static files.
现在，flask 将寻找一个名为staticin的目录，/foo/bar/zoo从哪里提供静态文件。仅send_from_directory当您提供的媒体文件可能与静态文件不在同一位置时才使用。
回答by alone
for me this one worked :
对我来说，这个有效：
@app.route('/static/<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)
beside adding this script into init
除了将此脚本添加到init
app._static_folder = os.path.abspath("static/")
app = Flask(__name__)
into __init__.py
进入 __init__.py
回答by bob
One possible cause of 404 error for pages you just added (even if programmed correctly), is if you have previous versions of the script (.py file) still running: make sure to close out and end (terminate) the process.
您刚刚添加的页面（即使编程正确）出现 404 错误的一个可能原因是，如果您的脚本（.py 文件）的先前版本仍在运行：确保关闭并结束（终止）进程。
