import requests
from ..exception import ExecutionError
# This driver implements a power port for Gude EPC-8316 Power Switches.
# These switches differ in their API to the previous switches for
# get-commands (because of a firmware bug).
#
# Apart from a workaround for this bug and reduced port index limits of
# 8 instead of 24, this implementation works just like gude24.py.
#
# Driver has been tested with:
# * Gude Expert Power Control 8316 (firmware v1.2.0)
PORT = 80
[docs]def power_set(host, port, index, value):
# The gude web-interface uses different pages for the three groups of
# switches. The web-interface always uses the 'correct' page to set a
# value. But commands for all pages are accepted on all pages.
index = int(index)
assert 1 <= index <= 8
# access the web interface...
value = 1 if value else 0
r = requests.get(
f"http://{host}:{port}/ov.html?cmd=1&p={index}&s={value}"
)
r.raise_for_status()
[docs]def power_get(host, port, index):
# The status of the ports is made available via a html <meta>-tag using the
# following format:
# <meta http-equiv="powerstate" content="Power Port ,0">
#
# The index of each port should normally be in there, but isn't, because of
# a firmware bug:
# <meta http-equiv="powerstate" content="Power Port 1,0">
#
# Again the status of all ports is made available on all pages.
index = int(index)
assert 1 <= index <= 8
# get the contents of the main page
r = requests.get(f"http://{host}:{port}/ov.html")
r.raise_for_status()
for line_no, line in enumerate(r.text.splitlines()):
if line_no == index and line.find("content=\"Power Port ") > 0:
if line.find(",0") > 0:
return False
if line.find(",1") > 0:
return True
raise ExecutionError("failed to parse the port status")
# if we got this far, something is wrong with the website
raise ExecutionError("failed to find the port")