SiteMon tracks changes in site contents as set up in the ini file, using CSS selectors, Xpath, or regular expressions. JS is supported*. Passworded pages and browser cookies are not, yet. Definitely works on CPython 3.10.5 w64 and PyPy 3.9 w64.
As output, it sends to stdout the space-separated list of "pages" that changed, as well as adds them to a report file with timestamps.
(* The script renders JS using Chromium, so it will download Chromium to ~/.pyppeteer (or %LOCALAPPDATA%/pyppeteer/) on first JS request.)
For CPython:
python3 -m ensurepip
python3 -m pip install --upgrade pip
python3 -m pip install keyboard requests_html
For PyPy 3.9 (works faster):
If you're working with Windows, you'll want to install lxml from the corresponding wheel first.
Now, a pp39 wheel for lxml... does not exist. Trying to do pip install lxml makes pip plop halfway. I built mine for w64, here (SHA1 = 7f6ca65ad4d6a268777e5c3e594afccc968447d2 :: malware-free). Download the file, run cmd.exe in your Download folder, then finally install the prerequisites:
pypy3 -m ensurepip
pypy3 -m pip install --upgrade pip
pypy3 -m pip install lxml-4.9.0-pp39-pypy39_pp73-win_amd64.whl
pypy3 -m pip install keyboard requests_html
If it breaks, I hope there's an official binary for py39 by then...
-h, --help show this help message and exit
-c X, --config X an ini file with the settings (default: ./sitemon.ini)
-C X, --continuity X a JSON continuity file (default: ./sitemon.json)
-r X, --report X the report file (default: ./sitemon.report.txt), "nul" for console-only
-f, --force force re-check all pages
-t N, --retries N do N retries downloading a page, -1 for infinite (default: 3)
-p, --pause waits for a keypress before closing
-s, --sslcheck perform SSL issue check (default: no checks)
-v, --verbose verbose console output (multiple allowed)
-q, --quiet no console output, overrides --verbose (multiple allowed)
Please read the sample config file for more instructions.