I followed the instructions from How to serve static files in Flask, but still couldn't get it working.
Here's my project structure:
Project_path
|
+--app
| |
| +--main.py
+--static
|
+--js
|
+--jquery-1.11.2.min.js
Here's 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:
...
<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.
But still, I got
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.
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()
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.
I'm still trying to figure out what to do.
5 Answers
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)
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.
All you need to do is, pass the static_folder parameter to the initiator:
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.
app = Flask(__name__, static_folder=os.path.abspath('/foo/bar/zoo/'))
Now, flask will look for a directory named static in /foo/bar/zoo from where to serve static files. You only use send_from_directory if you are serving media files which may not be in the same location as static files.
You forgot to add 'static' in the last os.path.join in the return clause.
for me this one worked :
@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
app._static_folder = os.path.abspath("static/")
app = Flask(__name__)
into __init__.py
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.
