testsAndMisc/python_pkg/mock_server
Krzysztof kuhy Rudnicki 2dd4e68edb refactor: rename folders to fix N999, INP001, S311 linting rules
- Rename PYTHON/ to python_pkg/ (fix N999 uppercase folder)
- Rename camelCase folders to snake_case:
  - randomJPG -> random_jpg
  - tagDivider -> tag_divider
  - downloadCats -> download_cats
  - keyboardCoop -> keyboard_coop
  - extractLinks -> extract_links
  - scapeWebsite -> scrape_website
- Rename camelCase files:
  - generateJpeg.py -> generate_jpeg.py
  - tagDivider.py -> tag_divider.py
- Rename poker-modifier-app to poker_modifier_app (fix INP001)
- Add __init__.py to poker_modifier_app
- Replace random module with secrets.SystemRandom (fix S311)
- Fix S110 try-except-pass with contextlib.suppress
- Update all imports and config references
2025-11-30 21:20:17 +01:00
..
__init__.py refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
mock_server.py refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
README.md refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
requirements.txt refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
run.sh refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00

Simulate Connection Failure

(it takes ≈ 1hr to get it working)

Install: https://mitmproxy.org/ (install it the way they recommend for your OS, for Ubuntu specifically apt version is 4 main versions behind newest version)

Run it using mitmproxy

Run your webbrowser using 127.0.0.1:8080 as proxy on chromium-based browser it should be enough to do: google-chrome --proxy-server=127.0.0.1:8080

Run mitmweb

open 127.0.0.1:8081

Click File in upper left corner and then Install Certificates

You should get a list of Windows/Linux/macOS/Firefox with certificates and how to install them

Install certificates using those instructions

important! Go to your browser certificate settings and ensure that:

  1. mitmproxy certificate is imported
  2. it is set to trusted

Now all of your network communication should go through mitmproxy, you can verify it by going to 127.0.0.1:8081 and seeing constant flow of requests

What can we do with it?

  1. Install mitmproxy python library using pip

pip install mitmproxy

  1. Copy and paste this “hello world”:
from mitmproxy import http

def request(flow: http.HTTPFlow) -> None:
    # Only intercept traffic to example.com
    if "example.com" in flow.request.host:
        flow.response = http.Response.make(
            502,  # Bad Gateway status code
            b"Simulated connection failure",
            {"Content-Type": "text/plain"}
        )

  1. Run it: mitmdump -s mitm_world.py
  2. Go to example.com
  3. You should see “simulated connection failure” in plain text