path: root/src/py/backend_server.py

#! /usr/bin/env python

import traceback
import sys
import socket
import json
import datetime
import time
import random
from multiprocessing import Process

import tornado.ioloop
import tornado.tcpserver
import tornado.httpserver
import tornado.websocket

import imc.async
from imc.proxy import Proxy,Connection

import mod
import netio
from netio import SocketStream,SocketConnection,WebSocketConnection
from tojauth import TOJAuth

from test_blob import TOJBlobTable,TOJBlobHandle
from imc.blobclient import BlobClient

class StdLogger(object):
    def __init__(self,callback):
        self._callback = callback

    def write(self,data):
        self._callback(data)

    def flush(self):
        pass

class BackendWorker(tornado.tcpserver.TCPServer):
    def __init__(self,center_addr,ws_port):
        super().__init__()

        self._log = StdLogger(self._send_log)
        self._ioloop = tornado.ioloop.IOLoop.current()
        self.center_addr = center_addr
        self.sock_addr = None
        self.ws_port = ws_port

        self._link = None
        self._idendesc = None
        self._pend_mainconn_linkmap = {}
        self._pend_filestream_filekeymap = {}
        self._client_linkmap = {}

    def start(self):
        #sys.stdout = self._log
        #sys.stderr = self._log

        sock_port = random.randrange(4096,8192)
        self.sock_addr = ('10.8.0.6',sock_port)

        self.bind(sock_port,'',socket.AF_INET,65536)
        super().start()

        self._conn_center()

    def handle_stream(self,stream,addr):
        def _recv_conn_info(data):
            info = json.loads(data.decode('utf-8'))
            conntype = info['conntype']

            if conntype == 'main':
                self._handle_mainconn(sock_stream,addr,info)

            elif conntype == 'file':
                self._handle_fileconn(sock_stream,addr,info)

        fd = stream.fileno()
        self._ioloop.remove_handler(fd)
        sock_stream = SocketStream(socket.fromfd(fd,socket.AF_INET,socket.SOCK_STREAM | socket.SOCK_NONBLOCK,0))

        netio.recv_pack(sock_stream,_recv_conn_info)

    def add_client(self,link,handler):
        @imc.async.caller
        def _call():
            with TOJAuth.change_current_iden(self._idendesc):
                Proxy.instance.call(self.center_conn.link + 'core/','add_client',10000,link,self._link)

        self._client_linkmap[link] = {}

        conn = netio.WebSocketConnection(link,handler)
        conn.add_close_callback(lambda conn : self.del_client(conn.link))
        Proxy.instance.add_conn(conn)

        _call()

        return conn

    def del_client(self,link):
        @imc.async.caller
        def _call():
            with TOJAuth.change_current_iden(self._idendesc):
                Proxy.instance.call(self.center_conn.link + 'core/','del_client',10000,link,self._link)

        del self._client_linkmap[link]

        _call()

    def _conn_center(self):
        def __retry(conn):
            print('retry connect center')

            self.center_conn = None
            self._ioloop.add_timeout(datetime.timedelta(seconds = 5),self._conn_center)

        def __send_worker_info():
            def ___recv_info_cb(data):
                info = json.loads(data.decode('utf-8'))
                pubkey = open('pubkey.pem','r').read()
                TOJAuth(pubkey)

                self._idendesc = info['idendesc']
                self._link = info['worker_link']
                Proxy(self._link,TOJAuth.instance,self._idendesc,self._conn_link)

                self.center_conn = SocketConnection(info['center_link'],stream,self.center_addr,self._add_pend_filestream)
                self.center_conn.add_close_callback(__retry)
                Proxy.instance.add_conn(self.center_conn)

                self._init_blobclient()

                #Proxy.instance.register_call('test/','get_client_list',self._test_get_client_list)
                #Proxy.instance.register_call('test/','test_dst',self._test_dst)
                #Proxy.instance.register_filter('test/',self._test_filter)

                try:
                    mod.load('Notice','notice',self._idendesc,self._get_link)
                    mod.load('UserMg','user',self._idendesc,self._get_link)
                    mod.load('SquareMg','square',self._idendesc,self._get_link)
                    mod.load('ProblemMg','problem',self._idendesc,self._get_link)
                    mod.load('Mail','mail',self._idendesc,self._get_link)

                except Exception as e:
                    print(e)

                #if self._link == '/backend/2/':
                #    self._test_call(None)

            sock_ip,sock_port = self.sock_addr
            netio.send_pack(stream,bytes(json.dumps({
                'conntype':'main',
                'linkclass':'backend',
                'sock_ip':sock_ip,
                'sock_port':sock_port,
                'ws_ip':'210.70.137.215',
                'ws_port':self.ws_port
            }),'utf-8'))
            netio.recv_pack(stream,___recv_info_cb)

        stream = SocketStream(socket.socket(socket.AF_INET,socket.SOCK_STREAM,0))
        stream.set_close_callback(__retry)
        stream.connect(self.center_addr,__send_worker_info)

    @imc.async.caller
    def _init_blobclient(self):
        blobclient = BlobClient(Proxy.instance,
                                TOJAuth.instance,
                                self._idendesc,
                                self._link,
                                self.center_conn.link,
                                'blobtmp/2',
                                TOJBlobTable(2),
                                TOJBlobHandle)

        blobclient.open_container('test','ACTIVE')
        try:
            handle = blobclient.open(
                'test','testblob',
                TOJBlobHandle.WRITE | TOJBlobHandle.CREATE
            )
        except:
            pass
        print(handle._fileno)
        handle.write(bytes('Hello Data','utf-8'),0)
        handle.commit(False);

    def _conn_link(self,link):
        def __handle_pend(conn):
            try:
                retids = self._pend_mainconn_linkmap.pop(worker_link)
            
            except KeyError:
                return

            for retid in retids:
                imc.async.ret(retid,conn)

        def __conn_cb():
            conn = Proxy.instance.get_conn(worker_link)
            if conn != None:
                __handle_pend(conn)
                main_stream.set_close_callback(None)
                main_stream.close()
            
            else:
                sock_ip,sock_port = self.sock_addr
                netio.send_pack(main_stream,bytes(json.dumps({
                    'conntype':'main',
                    'link':self._link,
                    'sock_ip':sock_ip,
                    'sock_port':sock_port
                }),'utf-8'))
                netio.recv_pack(main_stream,__recv_cb)

        def __recv_cb(data):
            stat = json.loads(data.decode('utf-8'))
            if stat == True:
                conn = SocketConnection(worker_link,main_stream,sock_addr,self._add_pend_filestream)
                Proxy.instance.add_conn(conn)
                __handle_pend(conn)

            else:
                main_stream.set_close_callback(None)
                main_stream.close()
        
        if self.center_conn == None:
            return None

        with TOJAuth.change_current_iden(self._idendesc):
            stat,ret = Proxy.instance.call(self.center_conn.link + 'core/','lookup_link',65536,link)

        if stat == False or ret == None:
            return None

        else:
            worker_link = ret['worker_link']

            conn = Proxy.instance.get_conn(worker_link)
            if conn != None:
                return conn

            elif worker_link in self._pend_mainconn_linkmap:
                self._pend_mainconn_linkmap[worker_link].append(imc.async.get_retid())
                return imc.async.switch_top()

            else:
                self._pend_mainconn_linkmap[worker_link] = [imc.async.get_retid()]

                sock_addr = (ret['sock_ip'],ret['sock_port'])

                main_stream = SocketStream(socket.socket(socket.AF_INET,socket.SOCK_STREAM,0))
                main_stream.set_close_callback(lambda conn : __handle_pend(None))
                main_stream.connect(sock_addr,__conn_cb)

                return imc.async.switch_top()

    def _add_pend_filestream(self,filekey,callback):
        self._pend_filestream_filekeymap[filekey] = tornado.stack_context.wrap(callback)

    def _handle_mainconn(self,main_stream,addr,info):
        link = info['link']
        sock_ip = info['sock_ip']
        sock_port = info['sock_port']

        conn = Proxy.instance.get_conn(link)
        if conn != None:
            return

        if (link not in self._pend_mainconn_linkmap) or self._link > link:
            conn = SocketConnection(link,main_stream,(sock_ip,sock_port),self._add_pend_filestream)
            Proxy.instance.add_conn(conn)

            netio.send_pack(main_stream,bytes(json.dumps(True),'utf-8'))
            
            if link in self._pend_mainconn_linkmap:
                retids = self._pend_mainconn_linkmap.pop(link)
                for retid in retids:
                    imc.async.ret(retid,conn)

        else:
            netio.send_pack(main_stream,bytes(json.dumps(False),'utf-8'))
        
    def _handle_fileconn(self,file_stream,addr,info):
        try:
            self._pend_filestream_filekeymap.pop(info['filekey'])(file_stream)

        except KeyError:
            pass

    def _get_link(self,linkclass,uid = None):
        if linkclass == 'center':
            return self.center_conn.link

        elif linkclass == 'client' and uid != None:
            stat,ret = Proxy.instance.call(self.center_conn.link + 'core/','get_uid_clientlink',10000,uid)
            print(ret)
            return ret

    @imc.async.caller
    def _send_log(self,data):
        links = self._client_linkmap.keys()

        with TOJAuth.change_current_iden(self._idendesc):
            for link in links:
                Proxy.instance.call_async(link + 'core/stat/','print_log',10000,None,data)

    @imc.async.caller
    def _test_get_client_list(self,talk,talk2):
        stat,ret = Proxy.instance.call(TOJAuth.get_current_iden()['link'] + 'test/route/','80s',1000,'attation','mega')
        print(ret)

        return list(self._client_linkmap.items())

    @imc.async.caller
    def _test_filter(self,dpart,func_name):
        print(dpart)
        print(func_name)

    @imc.async.caller
    def _test_call(self,param):
        with TOJAuth.change_current_iden(self._idendesc):
            st = time.perf_counter()
            for i in range(0,2):
                dst = '/backend/' + str((i % 2) + 2) + '/'
                if dst == self._link:
                    continue

                fileres = Proxy.instance.sendfile(dst,'Fedora-18-x86_64-DVD.iso')
                ret = Proxy.instance.call_async(dst + 'test/','test_dst',1000,lambda result: print(result),fileres.filekey)
                
                print(fileres.wait())

            print(time.perf_counter() - st)
            print(self._link)

        return

        pend = []
        for i in range(0,32):
            if str((i % 16) + 2) == self._link:
                continue

            fileres = Proxy.instance.sendfile('/backend/' + str((i % 16) + 2) + '/','Fedora-18-x86_64-DVD.iso')
            
            dst = '/backend/' + str((i % 16) + 2) + '/'
            ret = Proxy.instance.call(self._idendesc,dst,'test_dst',fileres.filekey)

            pend.append(fileres)

        for p in pend:
            print(self._link + ' ' + p.wait())

        print(self._link)

    @imc.async.caller
    def _test_dst(self,filekey):
        print(filekey)

        self._ioloop.add_timeout(datetime.timedelta(milliseconds = 2000),lambda : Proxy.instance.abortfile(filekey))
        #Proxy.instance.abortfile(filekey)
        fileres = Proxy.instance.recvfile(filekey,'data')
        #print('recv ' + fileres.wait())
        print(fileres.wait())

        return 'ok'

    @imc.async.caller
    def _test_dsta(self,iden,param):
        return param + ' Too'

class WebSocketConnHandler(tornado.websocket.WebSocketHandler):
    def open(self):
        pass

    def on_message(self,msg):
        global backend_worker

        if hasattr(self,'backend_conn'):
            self.backend_conn.recv_msg(msg)
        
        else:
            try:
                info = json.loads(msg)
                print(info)
                self.backend_conn = backend_worker.add_client(info['client_link'],self)

            except Exception:
                self.close()

    def on_close(self):
        global backend_backend

        if hasattr(self,'backend_conn'):
            self.backend_conn.close()

def start_backend_worker(ws_port):
    global backend_worker

    http_serv = tornado.httpserver.HTTPServer(tornado.web.Application([
        ('/conn',WebSocketConnHandler)
    ]))
    http_serv.listen(ws_port)

    backend_worker = BackendWorker(('10.8.0.6',5730),ws_port)
    backend_worker.start()

    tornado.ioloop.IOLoop.instance().start()

if __name__ == '__main__':
    worker_list = []

    worker_list.append(Process(target = start_backend_worker,args = (81, )))
    #worker_list.append(Process(target = start_backend_worker,args = (82, )))
    #worker_list.append(Process(target = start_backend_worker,args = (181, )))
    #worker_list.append(Process(target = start_backend_worker,args = (182, )))
    #worker_list.append(Process(target = start_backend_worker,args = (183, )))
    #worker_list.append(Process(target = start_backend_worker,args = (184, )))
    #worker_list.append(Process(target = start_backend_worker,args = (185, )))
    #worker_list.append(Process(target = start_backend_worker,args = (186, )))

    for proc in worker_list:
        proc.start()

    for proc in worker_list:
        proc.join()