Source code for labgrid.driver.power.gude24

This driver implements a power port for Gude Power Switches with up to
24 ports.
These switches differ in their API to the previous 8-port switches for set-
and get-commands.

Driver has been tested with:
* Gude Expert Power Control 8080

import re

import requests

from ..exception import ExecutionError

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 <= 24 # access the web interface... value = 1 if value else 0 response = requests.get( f"http://{host}:{port}/ov.html?cmd=1&p={index}&s={value}" ) # Check, that the port is in the desired state state = get_state(response, index) if state != value: raise ExecutionError(f"failed to set port {index} to status {value}")
[docs] def power_get(host, port, index): """ Get the status of a port. """ index = int(index) assert 1 <= index <= 24 # get the contents of the main page response = requests.get(f"http://{host}:{port}/ov.html") state = get_state(response, index) return state
[docs] def get_state(request, 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 1,0"> Again the status of all ports is made available on all pages. """ request.raise_for_status() # Get the power state of a specified index # raise an exception if the state cannot be determined. for line in request.text.splitlines(): if line.find(f"content=\"Power Port {index}") > 0: if line.find(",0") > 0: return False if line.find(",1") > 0: return True raise ExecutionError("failed to parse the port status") m ="Device is blocked by another user with IP ([^\s<]+)", request.text) if m: raise ExecutionError(f"device is blocked by another user with IP {}") # if we got this far, something is wrong with the website raise ExecutionError(f"failed to determine status of power port {index}")