BeeWatch/lib/beewatch/server/__init__.py

#! /usr/bin/env python3.5
# Copyright 2017 Digital
#
# This file is part of BeeWatch.
#
# BeeWatch is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# BeeWatch is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with BeeWatch.  If not, see <http://www.gnu.org/licenses/>.

import curio
import blinker
import logging
import logging.handlers
import digilib.network
import os
import queue
import select
import socket
import sys
import threading
import time
import traceback

import digilib.pin
import digilib.network
import beewatch
import beewatch.pinapi

log = logging.getLogger(__name__+"")
lapi = logging.getLogger(__name__+".api")
lchat = logging.getLogger(__name__+".chat")
lserver = logging.getLogger(__name__+".server")

class BeeWatchServer(digilib.network.Server):
    """docstring for Server."""

    def __init__(self,*args,**kwargs):
        super(BeeWatchServer, self).__init__(
            *args,
            **kwargs,
            handler_class=beewatch.server.ConnHandlerBeeWatch,
        )

    def make_socket(self):
        s = super(BeeWatchServer,self).make_socket()
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        return s

class ConnHandlerBeeWatch(digilib.network.ConnHandlerBase):

    def __init__(self, socket, addr, server):
        super(ConnHandlerBeeWatch, self).__init__(socket, addr, server)
        self.engines_ctrl = beewatch._controllers["engines_ctrl"]
        # digilib.pin.EnginesController(
        #     left=[4,17],
        #     right=[27,22],
        # )
        self.text_to_func = {
            "turn":self.engines_ctrl.turn
        }

    async def handle(self, data):
        data = data.strip()
        data = data.split(" ")
        cmd,*args = data
        kwargs = {"args":args,"command":cmd,"respond":self.respond}
        func = beewatch._commands.get(cmd,False)
        task = None
        if func == False:
            await self.respond("Unknown command")
            return
        try:
            coro = func(**kwargs)
            if hasattr(coro,"__await__"):
                task = await coro
        except Exception as e:
            lserver.error("api_func raised an error:",exc_info=e)
            tb = traceback.format_exc()
            await self.respond(tb,log_msg="traceback of '{}'"
                .format(e.__cause__))
        finally:
            pass
        if task:
            lserver.debug("exec: "+task.exception.__cause__)
        # task joins iself to suppress the "task not joined" warning
        cur_task = await curio.current_task()
        await curio.ignore_after(0,cur_task.wait)

    async def respond(self,text,*args,log_msg=False):
        await self.send(text,log_msg)

    # async def wait_for_func(self,coro):
    #     try:
    #         task = await curio.spawn(coro)
    #         try:
    #             await task.join()
    #         except Exception as e:
    #             lserver.error("error during api_func execution",exc_info=e)
    #         # we do this so we don't get an "task was not joined" error
    #         cur_task = await curio.current_task()
    #         await curio.ignore_after(0,cur_task.wait)
    #     except Exception as e:
    #         lserver.error("error",exc_info=e)

    async def welcome_client(self):
        await self.send("this is the server speaking, hello new client!")




































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