driver: digitalloggers_restapi: enable REST API

doc/configuration.rst

@@ -163,6 +163,14 @@ Currently available are:
   host argument must include the protocol, such as
   ``http://192.168.0.3`` or ``http://admin:pass@192.168.0.4``.
 
+``digitalloggers_restapi``
+  Controls *Digital Loggers PDUs* that use the REST API. Note that
+  host argument must include the protocol, such as
+  ``http://192.168.0.3`` or ``https://admin:pass@192.168.0.4``.
+  By default, only authenticated users may access the REST API.
+  HTTPS queries intentially ignore ssl certificate validation, since
+  the as-shipped certificate is self-signed.
+
 ``eaton``
   Controls *Eaton ePDUs* via SNMP.
 

labgrid/driver/power/digitalloggers_restapi.py

@@ -0,0 +1,72 @@
+'''
+Driver for Digital Loggers PDU that use the REST API.
+Tested with Ethernet Power Controller 7.
+
+Based on https://www.digital-loggers.com/restapi.pdf
+
+By default, only an authenticated user is allowed by REST API.
+
+NetworkPowerPort:
+    model: 'digitalloggers_restapi'
+    host: 'http://admin:1234@192.168.0.100'
+    index: 0
+'''
+
+import json
+import requests
+from requests.auth import HTTPDigestAuth
+from requests.packages import urllib3
+from urllib.parse import urlparse
+
+
+def extract_user_password_from_host(host):
+    url = urlparse(host)
+    if '@' in url.netloc:
+        user=url.username
+        password=url.password
+        _host= f'{url.scheme}://{url.netloc.split("@")[1]}'
+    else:
+        user = None
+        password = None
+        _host= f'{url.scheme}://{url.netloc}'
+    return user, password, _host
+
+def power_set(host, port, index, value):
+    # curl -u admin:1234 -v -X PUT -H "X-CSRF: x" --data 'value=true' --digest http://192.168.0.100/restapi/relay/outlets/=0/state/
+    # curl -u admin:1234 -v -X PUT -H "X-CSRF: x" --data 'value=false' --digest http://192.168.0.100/restapi/relay/outlets/=0/state/
+    # curl --insecure -u admin:1234 -v -X PUT -H "X-CSRF: x" --data 'value=true' --digest https://192.168.0.100/restapi/relay/outlets/=0/state/
+    # curl --insecure -u admin:1234 -v -X PUT -H "X-CSRF: x" --data 'value=false' --digest https://192.168.0.100/restapi/relay/outlets/=0/state/
+    assert port is None
+
+    index = int(index)
+    value = 'true' if value else 'false'
+    payload = {'value' : value }
+    headers = {'X-CSRF': 'x', 'Accept': 'application/json'}
+    user, password, url = extract_user_password_from_host(host)
+    host = f'{url}/restapi/relay/outlets/={index}/state/'
+    with urllib3.warnings.catch_warnings():
+        urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
+        if user and password:
+            r = requests.put(host, data=payload, auth=HTTPDigestAuth(user, password), headers=headers, verify=False)
+        else:
+            r = requests.put(host, data=payload, headers=headers, verify=False)
+        r.raise_for_status()
+
+def power_get(host, port, index):
+    # curl -u admin:1234 -v -X GET -H "X-CSRF: x" --digest http://192.168.0.100/restapi/relay/outlets/=0/state/
+    # curl --insecure -u admin:1234 -v -X GET -H "X-CSRF: x" --digest https://192.168.0.100/restapi/relay/outlets/=0/state/
+    assert port is None
+
+    index = int(index)
+    user, password, url = extract_user_password_from_host(host)
+    headers = {'X-CSRF': 'x', 'Accept': 'application/json'}
+    host = f'{url}/restapi/relay/outlets/={index}/state/'
+    with urllib3.warnings.catch_warnings():
+        urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
+        if user and password:
+            r = requests.get(host, auth=HTTPDigestAuth(user, password), headers=headers, verify=False)
+        else:
+            r = requests.get(host, headers=headers, verify=False)
+        r.raise_for_status()
+    statuses = r.json()
+    return statuses[0]

tests/test_powerdriver.py

@@ -279,6 +279,7 @@ def test_import_backends(self):
         import labgrid.driver.power.apc
         import labgrid.driver.power.digipower
         import labgrid.driver.power.digitalloggers_http
+        import labgrid.driver.power.digitalloggers_restapi
         import labgrid.driver.power.eth008
         import labgrid.driver.power.gude
         import labgrid.driver.power.gude24