get Client IP in a flask based application - nginx

Question

I have Flask application deployed in server. and we are using Nginx. nginx setup is as below:
proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_read_timeout 25s;
proxy_pass http://127.0.0.1:8000;
add_header X-Cache $upstream_cache_status;
In Flask setup I have done the following :
app = Flask(__name__, static_folder=None)
app.wsgi_app = ProxyFix(app.wsgi_app)
Now, whenever user visits a site, I want a real ip. Currently I am getting
127.0.0.1
I have tried like below:
if request.headers.getlist("X-Forwarded-For"):
ip = request.environ['HTTP_X_FORWARDED_FOR']
else:
ip = request.remote_addr
Could anybody guide me here please.

Answer 1

Use request.access_route
https://github.com/pallets/werkzeug/blob/master/werkzeug/wrappers.py
#cached_property
def access_route(self):
"""If a forwarded header exists this is a list of all ip addresses
from the client ip to the last proxy server.
"""
if 'HTTP_X_FORWARDED_FOR' in self.environ:
addr = self.environ['HTTP_X_FORWARDED_FOR'].split(',')
return self.list_storage_class([x.strip() for x in addr])
elif 'REMOTE_ADDR' in self.environ:
return self.list_storage_class([self.environ['REMOTE_ADDR']])
return self.list_storage_class()
Example Nginx config:
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Protocol https;
proxy_set_header X-Real-IP $remote_addr;
proxy_redirect off;
proxy_pass http://127.0.0.1:9000;
}

Answer 2

You should just have:
ip = request.access_route[-1]