TCP port monitoring utilities
Project description
por·tend pôrˈtend/ verb
be a sign or warning that (something, especially something momentous or calamitous) is likely to happen.
Usage
Use portend to monitor TCP ports for bound or unbound states.
For example, to wait for a port to be occupied, timing out after 3 seconds:
portend.occupied('www.google.com', 80, timeout=3)
Or to wait for a port to be free, timing out after 5 seconds:
portend.free('::1', 80, timeout=5)
The portend may also be executed directly. If the function succeeds, it returns nothing and exits with a status of 0. If it fails, it prints a message and exits with a status of 1. For example:
python -m portend localhost:31923 free (exits immediately) python -m portend -t 1 localhost:31923 occupied (one second passes) Port 31923 not bound on localhost.
Portend also exposes a find_available_local_port for identifying a suitable port for binding locally:
port = portend.find_available_local_port() print(port, "is available for binding")
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