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110 lines
3.3 KiB
110 lines
3.3 KiB
"""
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Support for discovery using GDM (Good Day Mate), multicast protocol by Plex.
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Inspired by
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hippojay's plexGDM:
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https://github.com/hippojay/script.plexbmc.helper/resources/lib/plexgdm.py
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iBaa's PlexConnect: https://github.com/iBaa/PlexConnect/PlexAPI.py
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"""
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import socket
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import struct
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class GDM:
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"""Base class to discover GDM services."""
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def __init__(self):
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self.entries = []
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self.last_scan = None
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def scan(self):
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"""Scan the network."""
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self.update()
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def all(self):
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"""Return all found entries.
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Will scan for entries if not scanned recently.
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"""
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self.scan()
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return list(self.entries)
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def find_by_content_type(self, value):
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"""Return a list of entries that match the content_type."""
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self.scan()
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return [entry for entry in self.entries
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if value in entry['data']['Content_Type']]
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def find_by_data(self, values):
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"""Return a list of entries that match the search parameters."""
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self.scan()
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return [entry for entry in self.entries
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if all(item in entry['data'].items()
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for item in values.items())]
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def update(self):
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"""Scan for new GDM services.
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Example of the dict list assigned to self.entries by this function:
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[{'data': {
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'Content-Type': 'plex/media-server',
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'Host': '53f4b5b6023d41182fe88a99b0e714ba.plex.direct',
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'Name': 'myfirstplexserver',
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'Port': '32400',
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'Resource-Identifier': '646ab0aa8a01c543e94ba975f6fd6efadc36b7',
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'Updated-At': '1444852697',
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'Version': '0.9.12.13.1464-4ccd2ca',
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},
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'from': ('10.10.10.100', 32414)}]
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"""
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gdm_ip = '239.0.0.250' # multicast to PMS
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gdm_port = 32414
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gdm_msg = 'M-SEARCH * HTTP/1.0'.encode('ascii')
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gdm_timeout = 1
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self.entries = []
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# setup socket for discovery -> multicast message
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.settimeout(gdm_timeout)
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# Set the time-to-live for messages for local network
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sock.setsockopt(socket.IPPROTO_IP,
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socket.IP_MULTICAST_TTL,
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struct.pack("B", gdm_timeout))
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try:
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# Send data to the multicast group
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sock.sendto(gdm_msg, (gdm_ip, gdm_port))
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# Look for responses from all recipients
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while True:
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try:
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data, server = sock.recvfrom(1024)
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data = data.decode('utf-8')
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if '200 OK' in data.splitlines()[0]:
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data = {k: v.strip() for (k, v) in (
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line.split(':') for line in
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data.splitlines() if ':' in line)}
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self.entries.append({'data': data,
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'from': server})
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except socket.timeout:
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break
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finally:
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sock.close()
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def main():
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"""Test GDM discovery."""
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from pprint import pprint
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gdm = GDM()
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pprint("Scanning GDM...")
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gdm.update()
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pprint(gdm.entries)
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if __name__ == "__main__":
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main()
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