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Unable to run Django Test Server in Ubuntu Server 16.04

I have 2 servers. I am attempting to setup one for continuous integration for my main website server
Web server 1(cloud-hosting):
Python3.6
Django3.1
Ubuntu16.04
Webserver 2(VPS):
Python3.7
Django3.1
Ubuntu16.04
Jenkins
--ShiningPanda(plugin)
Im new to web development, so if it seems odd as far as my web server types, that is why. I have been following along in the book Test Driven Development with Python. My issue is that when running python manage.py test [app] My [app] inherits from the class StaticLiveSever to generate a testing environment. On webserver 1, this works fine. On webserver 2, i get an error that the request address cannot be assigned. I use jenkins to build the environment, but the error i get is OSerror[99]:cannot assign requested address. I dont understand why this is happening when i run the same commands in Web Sever 1. It runs fine. Although again, the commands are run by jenkins and jenkins is configured to run python3.7
Full Traceback(Main Issue)
Traceback (most recent call last):
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/django/test/testcases.py", line 1449, in setUpClass
raise cls.server_thread.error
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/django/test/testcases.py", line 1374, in run
self.httpd = self._create_server()
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/django/test/testcases.py", line 1389, in _create_server
return ThreadedWSGIServer((self.host, self.port), QuietWSGIRequestHandler, allow_reuse_address=False)
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/django/core/servers/basehttp.py", line 67, in __init__
super().__init__(*args, **kwargs)
File "/usr/lib/python3.7/socketserver.py", line 452, in __init__
self.server_bind()
File "/usr/lib/python3.7/wsgiref/simple_server.py", line 50, in server_bind
HTTPServer.server_bind(self)
File "/usr/lib/python3.7/http/server.py", line 137, in server_bind
socketserver.TCPServer.server_bind(self)
File "/usr/lib/python3.7/socketserver.py", line 466, in server_bind
self.socket.bind(self.server_address)
OSError: [Errno 99] Cannot assign requested address
After hardcoded host
Traceback (most recent call last):
File "/var/lib/jenkins/workspace/Superlists/functional_tests/base.py", line 47, in setUp
self.browser = webdriver.Firefox()
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__
self.service.start()
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 100, in start
self.assert_process_still_running()
File "/var/lib/jenkins/shiningpanda/jobs/ddc1aed1/virtualenvs/d41d8cd9/lib/python3.7/site-packages/selenium/webdriver/common/service.py", line 113, in assert_process_still_running
% (self.path, return_code)
selenium.common.exceptions.WebDriverException: Message: Service geckodriver unexpectedly exited. Status code was: 69
geckodriver.log w/ hardcoded host ip in LiveTestServer
eckodriver: error: Address not available (os error 99)
geckodriver 0.27.0 (7b8c4f32cdde 2020-07-28 18:16 +0000)
WebDriver implementation for Firefox
USAGE:
geckodriver [FLAGS] [OPTIONS]
[...]
Hopefully the tracebacks above are not too confusing. Ultmiately what i did notice was the when im in webserver 2, i access the Django testcases.py module that has LiverServerThread and hardcode host=0.0.0.0 instead of host=localhost (1st traceback). The connection is then made although then the problem lies with geckodriver and the same thing (2nd traceback). I need to hard code ip 0.0.0.0 to be able to establish a connection, but then geckodriver is just listening, which i am assuming, at a completely different location (no error.log shown here).
So 1st id like to at least be able to make a connection to run the LiveServerThread class properly. Then try and resolve the issue with geckodriver. I also was not sure if the type of servers im running on poses as the problem.

Running Flask raises "WinError 10038"

Running a simple Flask app raises OSError: [WinError 10038] An operation was attempted on something that is not a socket. The page is not served in the browser. What does the error mean? How do I fix it?
from flask import Flask, render_template
app = Flask(__name__)
#app.route('/')
def index():
return 'Hello, World!'
if __name__ == '__main__':
app.run(debug=True)
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
* Restarting with stat
* Debugger is active!
* Debugger pin code: 294-294-951
Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Users\kdalal\AppData\Local\Continuum\Anaconda3\lib\threading.py", line 916, in _bootstrap_inner
self.run()
File "C:\Users\kdalal\AppData\Local\Continuum\Anaconda3\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\kdalal\AppData\Local\Continuum\Anaconda3\lib\site-packages\werkzeug\serving.py", line 670, in inner
fd=fd)
File "C:\Users\kdalal\AppData\Local\Continuum\Anaconda3\lib\site-packages\werkzeug\serving.py", line 564, in make_server
passthrough_errors, ssl_context, fd=fd)
File "C:\Users\kdalal\AppData\Local\Continuum\Anaconda3\lib\site-packages\werkzeug\serving.py", line 474, in __init__
socket.SOCK_STREAM)
File "C:\Users\kdalal\AppData\Local\Continuum\Anaconda3\lib\socket.py", line 460, in fromfd
nfd = dup(fd)
OSError: [WinError 10038] An operation was attempted on something that is not a socket

This issue was fixed in Werkzeug 0.12.1. Upgrade to the latest version:
pip install -U werkzeug

Today, September 2022, I am using Werkzeug 2.2.2 and I was getting exactly the same issue:
OSError: [WinError 10038] An operation was attempted on something that is not a socket
I tried using the environment variables FLASK_DEBUG and/or FLASK_ENVIRONMENT, since this error only appeared when I run the Flask app in debug mode, but I kept getting this socket error. Really frustrating not being able to use Flask in debug mode.
After more researching, I found the solution. I opened the command prompt (cmd) as an Administrator, and ran the following command netsh winsock reset then restarted the computer. The error doesn't appear anymore when I run Flask in debug mode now.
It would seem this is an issue only affecting those still with Vista or Windows 7, when the Winsock2 gets corrupted. More details can be found in these links:
how-and-why-to-perform-a-netsh-winsock-reset-on-windows
Microsoft support - Reset Winsock for Windows Vista
Original solution found on Karatos
Hopefully, this can be useful to someone with the same problem.

IOError: [Errno 0] Error while writing to output of Powershell in VSCode

This is the error I get in VSCode when running docker-compose.
PS D:\Work\Imho\Api> docker-compose -f docker-compose.yml up
Creating network "api_default" with the default driver
Pulling ignite (apacheignite/ignite:latest)...
latest: Pulling from apacheignite/ignite
5040bd298390: Pulling fs layer
fce5728aad85: Pulling fs layer
Traceback (most recent call last):
File "docker-compose", line 3, in <module>
File "compose\cli\main.py", line 68, in main
File "compose\cli\main.py", line 118, in perform_command
File "compose\cli\main.py", line 926, in up
File "compose\project.py", line 401, in up
File "compose\service.py", line 305, in ensure_image_exists
File "compose\service.py", line 1001, in pull
File "compose\progress_stream.py", line 37, in stream_output
File "codecs.py", line 370, in write
File "site-packages\colorama\ansitowin32.py", line 40, in write
File "site-packages\colorama\ansitowin32.py", line 141, in write
File "site-packages\colorama\ansitowin32.py", line 169, in write_and_convert
File "site-packages\colorama\ansitowin32.py", line 174, in write_plain_text
IOError: [Errno 0] Error
Failed to execute script docker-compose
docker-compose.yml:
version: '3'
services:
ignite:
image: apacheignite/ignite
This error only happens on one of my 3 machines, so I have no idea what causes it. Resetting to factory defaults or reinstalling docker and vscode doesn't help. Without docker compose the image is pulling and then working fine. All the machines are on windows 10 and latest stable docker installed.
Here is the issue I opened on github. It appeared that this behavior only occurs in VSCode powershell console, but not in regular powershell console. The solution with changing encoding suggested there didn't help.

Solution: Update to 1803 on Windows 10. If you can't update, use external command prompt.
The same thing happens to me with Python scripts. Apparently, this is a Windows Update issue:
https://github.com/Microsoft/vscode/issues/36630#issuecomment-359969098
Edit: My workaround due to my company restricting updates is to use external terminal in VS Code

Running Linux Commands from Python on Windows Computer

I am trying to learn how to run command line commands from Python. I am able to do this with DOS:
import subprocess
subprocess.call("dir",shell=True)
This is fine, but I need to be able to do this for linux commands because my company uses linux servers. I am using Mobaxterm to run a local linux session. When I try this:
import subprocess
subprocess.call("ls",shell=True)
I get this error from the terminal:
'ls' is not recognized as an internal or external command, operable program or batch file.
Which sounds ridiculous to me, because ls is clearly a linux command.
If I don't include shell=True I get this error:
Traceback (most recent call last):
File "ConsolePractice.py", line 4, in <module>
subprocess.call("ls")
File "C:\Users\my_username\AppData\Local\Programs\Python\Python35-32\lib\subprocess.py", line 560, in call
with Popen(*popenargs, **kwargs) as p:
File "C:\Users\my_username\AppData\Local\Programs\Python\Python35-32\lib\subprocess.py", line 950, in __init__
restore_signals, start_new_session)
File "C:\Users\my_username\AppData\Local\Programs\Python\Python35-32\lib\subprocess.py", line 1220, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified
So what am I doing wrong? How can I get this to work?
EDIT: Thanks for the comments. Python for Windows won't work for what I'm trying to do. I connected to a linux server and did:
cat > ConsoleCmd.py
import subprocess
subprocess.call("ls",shell=True)
^C
python ConsoleCmd.py
... and ls ran. Found the issue. I'll just have to get my scripts on to the server and run them from there. Thanks everyone

I was able to resolve this issue by opening an SFTP Session within Mobaxterm, transferring the python file to the server, then running the file directly on the server (python was already installed on the server).

SSL Handshake Error while connecting to Server via web client

I am using SSL Connection from Web Client (firefox) to connect to the local Server created via the code available in this link MDM server code I have all the required signed Certificates issued by Apple available for running the server, as well as all the depended python modules installed.
I ran my code using the following command on my Windows Machine.
python server.py .
This successfully start running the server at the port 8080.
C:\Users\Administrator\Desktop\MDMServer>python server.py <ip address>
Can't find MyApp.mobileprovision in current directory.
Need both MyApp.ipa and Manifest.plist to enable InstallCustomApp.
Starting Server
https://<ipaddress>:8080/
But whenever a Web Client tries to connect to this Server.
Upon launching the link https://<ip address>:8080 in the firefox. The Server reports the following error.
Traceback (most recent call last):
File "server.py", line 498, in <module>
app.run()
File "C:\Python27\lib\site-packages\web\application.py", line 313, in run
return wsgi.runwsgi(self.wsgifunc(*middleware))
File "C:\Python27\lib\site-packages\web\wsgi.py", line 54, in runwsgi
return httpserver.runsimple(func, validip(listget(sys.argv, 1, '')))
File "C:\Python27\lib\site-packages\web\httpserver.py", line 157, in runsimple
server.start()
File "C:\Python27\lib\site-packages\web\wsgiserver\__init__.py", line 1765, in
start
self.tick()
File "C:\Python27\lib\site-packages\web\wsgiserver\__init__.py", line 1815, in
tick
s, ssl_env = self.ssl_adapter.wrap(s)
File "C:\Python27\lib\site-packages\web\wsgiserver\ssl_builtin.py", line 42, i
n wrap
keyfile=self.private_key, ssl_version=ssl.PROTOCOL_SSLv23)
File "C:\Python27\lib\ssl.py", line 372, in wrap_socket
ciphers=ciphers)
File "C:\Python27\lib\ssl.py", line 134, in __init__
self.do_handshake()
File "C:\Python27\lib\ssl.py", line 296, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [Errno 1] _ssl.c:503: error:1408A0C1:SSL routines:SSL3_GET_CLIENT_
HELLO:no shared cipher
Can anyone help me understand:
1) What these errors mean
2) Why I'm getting them, It was not coming with the older version of server.py code applicable to iphone 4s?
3) How I can go about fixing these
Thanks,
Vivek

This is because APNSWrapper hasn't been updated to TLSv1 yet.
Apple no longer supports sslv3 for MDM due to the POODLE vulnerability.
You can update APNSWrapper source yourself though pretty easily.
download the source and update connection.py
ssl_version = self.ssl_module.PROTOCOL_TLSv1,
the run
python setup.py install