A pure python implementation of multicast DNS service discovery
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python-zeroconf
This is fork of pyzeroconf, Multicast DNS Service Discovery for Python, originally by Paul Scott-Murphy (https://github.com/paulsm/pyzeroconf), modified by William McBrine (https://github.com/wmcbrine/pyzeroconf).
The original William McBrine’s fork note:
This fork is used in all of my TiVo-related projects: HME for Python (and therefore HME/VLC), Network Remote, Remote Proxy, and pyTivo. Before this, I was tracking the changes for zeroconf.py in three separate repos. I figured I should have an authoritative source. Although I make changes based on my experience with TiVos, I expect that they're generally applicable. This version also includes patches found on the now-defunct (?) Launchpad repo of pyzeroconf, and elsewhere around the net -- not always well-documented, sorry.
Compatible with:
Bonjour
Avahi
Compared to some other Zeroconf/Bonjour/Avahi Python packages, python-zeroconf:
isn’t tied to Bonjour or Avahi
doesn’t use D-Bus
doesn’t force you to use particular event loop or Twisted (asyncio is used under the hood but not required)
is pip-installable
has PyPI distribution
has an optional cython extension for performance (pure python is supported as well)
Python compatibility
CPython 3.8+
PyPy3.8 7.3+
Versioning
This project uses semantic versioning.
Status
This project is actively maintained.
Traffic Reduction
Before version 0.32, most traffic reduction techniques described in https://datatracker.ietf.org/doc/html/rfc6762#section-7 where not implemented which could lead to excessive network traffic. It is highly recommended that version 0.32 or later is used if this is a concern.
IPv6 support
IPv6 support is relatively new and currently limited, specifically:
InterfaceChoice.All is an alias for InterfaceChoice.Default on non-POSIX systems.
Dual-stack IPv6 sockets are used, which may not be supported everywhere (some BSD variants do not have them).
Listening on localhost (::1) does not work. Help with understanding why is appreciated.
How to get python-zeroconf?
GitHub project https://github.com/python-zeroconf/python-zeroconf
The easiest way to install python-zeroconf is using pip:
pip install zeroconf
How do I use it?
Here’s an example of browsing for a service:
from zeroconf import ServiceBrowser, ServiceListener, Zeroconf
class MyListener(ServiceListener):
def update_service(self, zc: Zeroconf, type_: str, name: str) -> None:
print(f"Service {name} updated")
def remove_service(self, zc: Zeroconf, type_: str, name: str) -> None:
print(f"Service {name} removed")
def add_service(self, zc: Zeroconf, type_: str, name: str) -> None:
info = zc.get_service_info(type_, name)
print(f"Service {name} added, service info: {info}")
zeroconf = Zeroconf()
listener = MyListener()
browser = ServiceBrowser(zeroconf, "_http._tcp.local.", listener)
try:
input("Press enter to exit...\n\n")
finally:
zeroconf.close()If you don’t know the name of the service you need to browse for, try:
from zeroconf import ZeroconfServiceTypes
print('\n'.join(ZeroconfServiceTypes.find()))See examples directory for more.
Changelog
License
LGPL, see COPYING file for details.
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