I am using CherryPy to serve my application in multiple ports say 8080 and 8081
cherrypy.server.unsubscribe()
for port in [8080, 8081]:
server = Server()
server.socket_port = port
server.socket_host = "0.0.0.0"
server.thread_pool = 100
server.subscribe()
cherrypy.engine.start()
cherrypy.engine.block()
With this the application is being served as expected on both the ports. Now due to some reason I want to stop the server of a specific port and other being served normally. When I stop the process on a particular port with the following command,
fuser -k "$port"/tcp
All the process on the ports in which the application was started (8080, 8081) are also being killed. Is this an expected behaviour ?
If yes, is there anyway I can achieve serving the application independently without affecting the other ports on which it is running ? (Other than like I should change the port in the source code and run it again manually)
If no, what is the mistake I am doing here ?
Any help would be appreciated!
Related
I am trying to set up a simple webserver. This is the simplified code.
from flask import Flask
from waitress import serve
app = Flask(__name__)
#app.route("/data")
def get_data():
return {"abc"[i]:i for i in range(3)}
if __name__=="__main__":
# app.run(debug=True, host="0.0.0.0", port=8080)
serve(app, host="0.0.0.0", port=8080)
I can connect to this on my desktop and my phone (which is on my WiFi) and it works as desired.
The issue comes when a connection is attempted from a device not on my network (say a phone on a different network). The response is ERR_ADDRESS_UNREACHABLE.
I setup an inbound rule in my firewall settings. I'm on a windows 10 OS right now if that matters.
ProtocolType=TCP (it was default)
LocalPort="Specific Ports" and 8080
RemotePort="All Ports"
I also read I should set up port forwarding in my router so I followed these instructions from my ISP.
It's in the Service List
Global Port Range is 8080-8080
Protocol is TCP/UDP (again, default)
Host Port is 8080
I'm not sure what else I should change.
Thanks!
Answering my own question for posterity.
My issue was some AT&T weirdness. I turned on IP passthrough in my router settings and other people can connect to the server.
If I run ipconfig in my cmd prompt, I get an IPv4 of A.B.C.D, but https://whatismyipaddress.com/ responds with E.F.G.H.
I can connect to A.B.C.D:8080/data from my computer but not the other IP.
Someone not on my IP can connect to E.F.G.H:8080/data from a different network but not the other one.
The final takeaway is that I should probably just use some sort of ns services like cloudflare.
I wrote server in python and now I would like to configure apache web server to support websockets.
My server returns information when a client sends queries to these addresses:
def make_app():
return tornado.web.Application([
(r"/playgame", EmptyGame),
(r"/playgame/", EmptyGame),
(r"/playgame/(.*)", PlayerGameWebsocket)
])
How to configure the server to support regular user traffic but also to enable websockets when the client establishes such a connection?
I user apache2.4 server.
Ok, it turned out that the solution is trivial. If someone ever looked for an answer, just add a simple redirection to the application in the virtual host configuration which listens on localhost:
ProxyPassMatch "/playgame/(.*)" "ws://127.0.0.1:8888/playgame/$1"
ProxyPassReverse "/playgame/(.*)" "ws://127.0.0.1:8888/playgame/$1"
Thanks to such syntax, we can even pass additional data, e.g. "/playgame/123".
We connect from the client without specifying the port:
var adr = "ws://serverip/playgame/" + gameid;
var ws = new WebSocket(adr);
I have a Django application deployed on a VM using uWSGI & Nginx setup.
I would like to print some data, by passing the required information to a printer that is configured on the same network using a socket:
printer_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
printer_socket.connect(('10.125.125.2', 9001))
printer_socket.send(bytes(source='data', encoding='utf-8'))
Note: the IP address and the port are here for illustration purposes.
Problem: I get a Err 111 Connection refused error, however. The error is triggered at the printer_socket.connect step.
Additional information: The python code that initializes the socket, connects to the required IP address/Port and sends the data works fine when it's run from the python interactive shell.
Question: What do I need to configure in order to allow opening sockets from a django web application, deployed using uWSGI and Nginx?
Please keep in mind that the configuration of the project is out of the scope of this question. I don't have troubles configuring the app. The app works fine. I am specifically interested in how to allow opening sockets from a web app, served using uWSGI + Nginx setup
UPDATE
Here's the .ini configuration file for the uWSGI.
[uwsgi]
project = App
uid = user
base = /home/%(uid)
chdir = %(base)/%(project)
home = %(base)/Venv/%(project)
module = %(project).wsgi:application
# daemonize = %{base}/uwsgi/%{project}.log
logto = /home/user/logs/uwsgi/%{project}.log
master = true
processes = 5
socket = /run/uwsgi/%(project).sock
chown-socket = %(uid):www-data
chmod-socket = 777
vacuum = true
buffer-size=32768
Thank you.
I tried to run scrapy spiders in a flask app, and there is a API in github Arachne.But there is something wrong when I run the demo project in my mac.The app.py looks like this:
app = Arachne(__name__)
resource = WSGIResource(reactor, reactor.getThreadPool(), app)
site = Site(resource,
logFormatter=http.combinedLogFormatter,
logPath="logs/"+datetime.now().strftime("%Y-%m-%d.web.log"))
reactor.listenTCP(8080, site)
if __name__ == '__main__':
reactor.run()
But when I run this file,there is an error:
twisted.internet.error.CannotListenError: Couldn't listen on any:8080: [Errno 48] Address already in use.
I tried to solve this by the method which is mentioned in this question:twisted python server port already in use.And the result after I use the command to kill the process in my terminal like this:
sunzhendeMacBook-Pro:~ Rabbit$ lsof -n -iTCP:8080 -sTCP:LISTEN
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Python 5151 Rabbit 3u IPv4 0x738fcf82e37369b9 0t0 TCP *:http-alt (LISTEN)
However,when I run the demo project the Address already in use problem still there.I've also tried to change another port number, but the program has no result if I change the port.
So I wonder who has ever used Arachne API has encountered this problem and can give me a solution.Or does anybody has other good way to run multi spiders in flask app?
I have managed to to install flask and run the hello-world script:
from flask import Flask
app = Flask(__name__)
#app.route('/')
def hello_world():
return 'Hello World!'
if __name__ == '__main__':
app.run()
I was impressed how easy it was. Then I wanted to make my web-server visible externally. As recommended, I put host='0.0.0.0' as the argument of run function. Then I found my IP address (in Google) and put it in the address line of my web browser (while the hello-world-script was running).
As a result I got: "A username and password are being requested" and a dialogue box where I need to put a user name and password. I am not sure but I think it comes from my wireless network. Is there a way to change this behaviour?
How are you trying to run your application? If you run flask as app.run() - flask creates its own WSGI server on your host (by default 127.0.0.1) and port (by default 5000) (need permissions if port < 1000). If you run flask using nginx + WSGI or etc. your server resolves host and port.
Now it looks like you want get application by port which resolved your server like nginx or Apache. Try to get flask application by http://your-server-host-or-ip:5000 with the default port or try to change the port (set explicit) like app.run('0.0.0.0', 8080) and get it by http://your-server-host-or-ip:8080.
By the way, you can always get IP address using command-line tools e.g. ifconfig for Unix-like systems, or ipconfig /all for Windows.
To elaborate a little bit onto what #tbicr said, that password prompt indicates that you're trying to connect to your IP on port 80, which is most likely hosting an administration page for your router/modem. You want to connect to your IP on port 5000, the default port for Flask apps run with app.run().