iframe-proxy | Sunbelt Computer Software

History

163 lines (125 loc) · 4.26 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

"""

Author: Steffen Vogel <post@steffenvogel.de>

SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University

SPDX-License-Identifier: Apache-2.0

""" # noqa: E501

import datetime

import json

import logging

import os

import signal

import subprocess

from tempfile import NamedTemporaryFile

import urllib.request

import urllib.error

LOGGER = logging.getLogger("villas.node")

class Node(object):

api_version = "v2"

def __init__(

self,

api_url=None,

log_filename=None,

config_filename=None,

config={},

executable="villas-node",

**kwargs,

self.api_url = api_url

self.log_filename = log_filename

self.executable = executable

if config_filename and config:

raise RuntimeError(

"Can't provide config_filename and " "config at the same time!"

)

if config_filename:

with open(config_filename) as f:

self.config = json.load(f)

else:

self.config = config

# Try to deduct api_url from config

if self.api_url is None:

port = config.get("http", {}).get("port")

if port is None:

port = 80 if os.getuid() == 0 else 8080

self.api_url = f"http://localhost:{port}"

def start(self):

self.config_file = NamedTemporaryFile(mode="w+", suffix=".json")

json.dump(self.config, self.config_file)

self.config_file.flush()

if self.log_filename is None:

now = datetime.datetime.now()

fmt = "villas-node_%Y-%m-%d_%H-%M-%S.log"

self.log_filename = now.strftime(fmt)

self.log = open(self.log_filename, "w+")

LOGGER.info(

f"Starting VILLASnode instance with config: {self.config_file.name}" # noqa: E501

)

self.child = subprocess.Popen(

[self.executable, self.config_file.name],

stdout=self.log,

stderr=self.log,

)

def pause(self):

LOGGER.info("Pausing VILLASnode instance")

self.child.send_signal(signal.SIGSTOP)

def resume(self):

LOGGER.info("Resuming VILLASnode instance")

self.child.send_signal(signal.SIGCONT)

def stop(self):

LOGGER.info("Stopping VILLASnode instance")

self.child.send_signal(signal.SIGTERM)

self.child.wait()

self.log.close()

def restart(self):

LOGGER.info("Restarting VILLASnode instance")

self.request("restart", method="POST")

@property

def active_config(self):

return self.request("config")

@property

def nodes(self):

return self.request("nodes")

@property

def paths(self):

return self.request("paths")

@property

def status(self):

return self.request("status")

def load_config(self, i):

if type(i) is dict:

cfg = i

elif type(i) is str:

cfg = json.loads(i)

elif hasattr(i, "read"): # file-like?

cfg = json.load(i)

else:

raise TypeError()

req = {"config": cfg}

self.request("restart", method="POST", json=req)

def request(self, action, method="GET", **args):

timeout = args.get("timeout", 1)

json_data = args.get("json")

url = f"{self.api_url}/api/{self.api_version}/{action}"

# Prepare the request

req = urllib.request.Request(url, method=method)

# Add JSON data if provided

if json_data:

req.add_header("Content-Type", "application/json")

data = json.dumps(json_data).encode("utf-8")

req.data = data

try:

with urllib.request.urlopen(req, timeout=timeout) as response:

return json.loads(response.read().decode("utf-8"))

except urllib.error.HTTPError as e:

raise e

def get_local_version(self):

ver = subprocess.check_output([self.executable, "-V"])

return ver.decode("ascii").rstrip()

def get_version(self):

resp = self.request("status")

return resp["version"]

def is_running(self):

if self.child is None:

return False

else:

return self.child.poll() is None

Sunbelt Computer Software

PL/B Language Development and Support

Navigation Menu

Uh oh!

Sunbelt Computer Software

PL/B Language Development and Support

Uh oh!

FilesExpand file tree

node.py

Latest commit

History

node.py

File metadata and controls