world.
I am deploying a flask app and when I run the application and run.py, it runs on the http:\\0.0.0.:9999 but I want to run it on my localhost. Where and how do I change this?
Attached is the terminal output
run application terminal output
thanks.
you change it at the app.run line:
app.run(host="127.0.0.1", port=9999)
Related
I am trying to set up a server on a windows 10 machine, using Python and Flask, but it is not responding to external requests.
This is my server.py file:
from flask import Flask
app = Flask(__name__)
#app.route("/")
def index():
return "Hi there"
if __name__ == "__main__":
app.run(host="0.0.0.0", port=5000)
When running, it says:
* Running on all addresses (0.0.0.0)
WARNING: This is a development server. Do not use it in a production deployment.
* Running on http://127.0.0.1:5000
* Running on http://195.XX.XXX.XXX:5000 (Press CTRL+C to quit)
Indeed, if I try to access it from that machine, using 127.0.0.1:5000 or 195.XX.XXX.XXX:5000, it works correctly.
However, when trying to access it from another machine, (using Chrome if that can be an issue), it just loads indefinitely, then says no data received, ERR_EMPTY_RESPONSE.
What is wrong with this? I've followed steps on the documentation so I don't get what could be wrong.
I also disabled firewall entirely on the windows 10 machine.
How you're running matters. If it's via
python server.py
then the app.run() will execute, and the server will bind to 0.0.0.0
But if you're running via some variant of
FLASK_APP=server.py flask run
then app.run() won't execute, and the server will bind to 127.0.0.1
In that case, adding --host=0.0.0.0 should fix things (unless you're having a firewall issue).
I am running a python flask application in replit and when it try to access the url, i am getting the following message
Hmmmm.... We Couldn't Reach Your Repl Make sure your repl has a port open and is ready to receive HTTP traffic.
How to solve this error
Possibly you're running the flask server on a used port.
Try to set a different port:
app.run(host='0.0.0.0', port=8080)
or
flask run --host=0.0.0.0 --port=8080
According to the Flask documentation,
The flask script is nice to start a local development server, but you
would have to restart it manually after each change to your code. That
is not very nice and Flask can do better. If you enable debug support
the server will reload itself on code changes, and it will also
provide you with a helpful debugger if things go wrong.
To enable all development features (including debug mode) you can
export the FLASK_ENV environment variable and set it to development
before running the server:
$ export FLASK_ENV=development
$ flask run
However, in my very simple example, code changes still don't take effect until I restart the server. I've set up the particular script I want to run with export FLASK_APP=hello.py and the script is as follows:
from flask import Flask, url_for, request, render_template
app = Flask(__name__)
#app.route("/")
def hello():
return "Hello World!!"
While the Flask development server is running, I change the return value by adding or removing an exclamation mark and saving the file. Then I refresh the page on http://127.0.0.1:5000/ in Chrome, but the number of exclamation points is unchanged. Once I quit Flask in the terminal using Ctrl-C and restart it and then refresh the page again, I get the proper number of exclamation points.
This is on a Mac, Python 3.6.0 (Anaconda), Flask 0.12.
Am I misunderstanding how the development server can help me, or is there anything else you think I should check? I'm quite new to Flask.
Try
FLASK_APP=app.py FLASK_DEBUG=1 TEMPLATES_AUTO_RELOAD=1 flask run
FLASK_DEBUG will get you the behavior you're looking for now; TEMPLATE_AUTO_RELOAD will get you the behavior you'll need as soon as you starting using templates.
$env:FLASK_ENV = "development"
flask run
That's worked for me on my Win10 laptop running VS code
Looking at app.config contents I discovered variable ENV='production'.
Set ENV='development' in config file and it worked. FLASK_ENV variable does not even exist.
I have a very simple flask application that integrates flask-socketio, and I am trying to run my server using the flask run command on my terminal. I have read the documentation and this should do the job, however the output is the following, and I cannot reach my server on 127.0.0.1:5000
and here is my code:
I would really appreciate any help :)
the problem mainly was because I was using the latest version of flask (flask 1.0) if i revert back to flask 0.12.2 running the server using flask run will work as expected.
You can use the following code snippet to host your falsk app on localhost with port number as 5000 at the end of your code.
app.run(host='127.0.0.1', port=5000)
I hope, it helps!
I have a remote machine at my workplace, when we developers run server/ or docker containers. everything was working fine but a while back somethign went wrong.
if I run the python flask app
from app import app
app.run(host='0.0.0.0', port=5050)
i get message
* Running on http://0.0.0.0:5050/
and I am able to access the above from my local machine using the remote server machine ip:5050 but if I run docker container docker run -itd <conta_image_name> -p 80:90 --add-host=localdomain.com:machine_ip_address i get error message saying IPv4 forwarding is disabled. Networking will not work.
Now this issue is in production so I really need someone to throw up some light, what might be wrong or let me know what more info I need to put.
I have fixed this issue myself following this: https://success.docker.com/article/ipv4-forwarding
Another solution is..
Try adding -net=host along with docker run command
https://medium.com/#gchandra/docker-ipv4-forwarding-is-disabled-8499ce59231e