openlp/openlp/core/api/http/server.py

# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4

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# OpenLP - Open Source Lyrics Projection                                      #
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# Copyright (c) 2008-2016 OpenLP Developers                                   #
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# This program is free software; you can redistribute it and/or modify it     #
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"""
The :mod:`http` module contains the API web server. This is a lightweight web server used by remotes to interact
with OpenLP. It uses JSON to communicate with the remotes.
"""

import logging

from PyQt5 import QtCore
from waitress import serve

from openlp.core.api.http import application
from openlp.core.common import RegistryProperties, OpenLPMixin, Settings

log = logging.getLogger(__name__)


class HttpWorker(QtCore.QObject):
    """
    A special Qt thread class to allow the HTTP server to run at the same time as the UI.
    """
    def __init__(self):
        """
        Constructor for the thread class.

        :param server: The http server class.
        """
        super(HttpWorker, self).__init__()

    def run(self):
        """
        Run the thread.
        """
        address = Settings().value('api/ip address')
        port = Settings().value('api/port')
        serve(application, host=address, port=port)

    def stop(self):
        pass


class HttpServer(RegistryProperties, OpenLPMixin):
    """
    Wrapper round a server instance
    """
    def __init__(self):
        """
        Initialise the http server, and start the http server
        """
        super(HttpServer, self).__init__()
        self.worker = HttpWorker()
        self.thread = QtCore.QThread()
        self.worker.moveToThread(self.thread)
        self.thread.started.connect(self.worker.run)
        self.thread.start()