flask can't load static files when using nginx

Question

I'm using flask + gunicorn for my website. and I'm using nginx for reverse proxy only. and set up as nginx config flask proxy setups. I haven't added location /static info in nginx.conf file. so all static files are supposed to be handled by flask itself. but when visiting from public network, it can't load css files. I tried to run flask + gunicorn alone without nginx, it worked well. so why can't flask serve static files by itself behind nginx?

Then I added location /statis info into nginx config file so that nginx may serve static file instead. Still can't load static files. when i looked into error log. it shows

"/var/www/my_project_folder/static/css/style.css" failed (2: No such file or directory), client: 61.152.126.178, server: _, request: "GET /static/css/style.css HTTP/1.1", host: "47.97.209.250", referrer: "http://47.97.209.250"

the path in the error message actually is correct. the last method I tried is to run all script and service under root and chmod my_project to 666. still no success.

I searched on stackoverflow, but no one mentioned the issue that flask itselft can't serve static files behind nginx.

So i hope anyone have any idea or clue about this. and nginx serving issue

Thank

Possible duplicate of Running a flask app with nginx and gunicorn — plaes
– plaes, Commented Mar 21, 2018 at 6:34
@FrankAK, you mean the static path in nginx conf or in flask template? In template i use url_for('static', filename='css/style.css'), which I don't think i need to modify, since i move the whole project to var/www/my_project folder. — X.Z
– X.Z, Commented Mar 21, 2018 at 7:16

Joakin Montesinos · Accepted Answer · 2019-12-10 14:33:35Z

0

I solved it with: https://www.reddit.com/r/flask/comments/avkjh0/ask_flask_serve_static_files_from_flask_app_via/

nginx.sh:

USE_STATIC_PATH=${STATIC_PATH:-'/app/static'}

location /webappB/static {
  #alias /path/to/webappB/static;
  alias $USE_STATIC_PATH;
}

main.py:

app = Flask(__name__, static_url_path="/webappA")

answered Dec 10, 2019 at 14:33

Joakin Montesinos

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