class McastParams(object):
""" Esta classe armazena e retorna alguns parametros e funcoes comuns ao
cliente e servidor multicast. O objetivo principal eh evitar redundancia
de codigo """
def __init__(self,port,addr,sbound="",sport=None):
self.__port = int(port)
self.__addr = addr
self.__serverbound = sbound
self.__serverport = sport or int(port)-1
self.__log = Log()
self.__quit = False
def quit(self):
""" Mata threads, se existirem """
if self.getThread():
os.kill(self.getThreadPID(),signal.SIGKILL)
self.closeSocket()
def shouldQuit(self):
return self.__quit
def closeSocket(self):
self.getSocket().close()
def getSocket(self):
return self.__socket
def getPort(self):
return self.__port
def getAddr(self):
return self.__addr
def writeLog(self, v, msg):
self.__log.log(v,"Mcast:%s"%msg)
def getServerBound(self):
return self.__serverbound
def getServerPort(self):
return self.__serverport
def setThreadPID(self,pid):
self.__threadPID = pid
def getThreadPID(self):
return self.__threadPID
def read(self):
while True:
try:
return self.getSocket().recvfrom(1024)
except socket.error, errormsg:
self.writeLog(LOGERROR,"read")
def waitrequest(*args):
""" Executa funcao "handle" para cada mensagem recebida.
Funcao executada em uma thread separada """
obj, handle = args[0], args[1]
obj.setThreadPID(os.getpid())
log = Log()
while not obj.shouldQuit():
try:
handle(obj.read())
except socket.error,errormsg:
log.log(LOGERROR,"watrequest:%s"%errormsg)
pass
time.sleep(0.01)
class GetLatestPriceController(object):
"""Gets the latest known price for a given symbol"""
def __init__(self):
self.log = Log(file_handler, self.__class__.__name__)
def call(self, symbol):
if symbol not in allowed_symbols or not buffer_dict:
self.log.debug("Requested symbol %s is not allowed or has no data." % symbol)
return json.dumps({"result": None})
last_trade_time = max(buffer_dict)
data = buffer_dict.get(last_trade_time)
result = {"symbol": data.get("symbol"),
"price": data.get("price"),
"time": last_trade_time.strftime("%Y-%m-%d %H:%M:%S")}
return json.dumps({"result": result})
def __init__(self,port,addr,sbound="",sport=None):
self.__port = int(port)
self.__addr = addr
self.__serverbound = sbound
self.__serverport = sport or int(port)-1
self.__log = Log()
self.__quit = False
class GetChartDataController(object):
"""Gets chart data for a given symbol"""
def __init__(self):
self.log = Log(file_handler, self.__class__.__name__)
def call(self, symbol):
if symbol not in allowed_symbols or not buffer_dict:
self.log.debug("Requested symbol %s is not allowed or has no data." % symbol)
return json.dumps({"result": None})
labels = [k.strftime("%H:%M:%S") for k in buffer_dict.keys()]
data = [p.get("price") for p in buffer_dict.values()]
result = {"symbol": symbol,
"labels": labels,
"data": data,
"min": float(min(data)) - 10,
"max": float(max(data)) + 10}
return json.dumps({"result": result})
class IndexViewController(object):
"""Basic index view"""
def __init__(self):
self.log = Log(file_handler, self.__class__.__name__)
def call(self):
self.get_socket()
return render_template("index.html", channel_href=config.channel_href)
def get_socket(self):
client = Client(config.api_key, config.api_secret)
bm = BinanceSocketManager(client)
bm.start_trade_socket("BTCUSDT", self.process_message)
return bm.start()
def process_message(self, msg):
utime = str(msg.get("T"))[:10]
ms = str(msg.get("T"))[-3:]
dt = datetime.fromtimestamp(int(utime)).replace(microsecond=int(ms) * 1000)
symbol = msg.get("s")
price = "%.2f" % float(msg.get("p"))
buffer_dict.update({dt: {"symbol": symbol, "price": price}})
delete_keys = []
for k in buffer_dict.keys():
if (dt - k).seconds > config.timeframe or (datetime.now() - k).seconds > config.timeframe:
delete_keys.append(k)
if delete_keys:
for k in delete_keys:
del buffer_dict[k]
self.log.info("Deleted keys: %s" % delete_keys)
prices = [p.get("price") for p in buffer_dict.values()]
if prices:
max_price = max(prices)
min_price = min(prices[prices.index(max_price):])
drop_percent = (float(max_price) - float(min_price)) / float(max_price)
if (drop_percent > config.percent_threshhold and drop_percent not in registered_drops.get("drops", [])
and datetime.now() - dt).seconds < 5):
self.send_notification(symbol, max_price, min_price, "{:.2%}".format(drop_percent))
PriceLog.create(symbol=symbol, max_price=max_price,
min_price=min_price, drop_percent=round(drop_percent * 100, 2))
registered_drops.get("drops", []).append(drop_percent)
class ClearRegisteredDropsController(object):
"""Clears registered drops list"""
def __init__(self):
self.log = Log(file_handler, self.__class__.__name__)
def call(self):
now = datetime.now()
delete_keys = []
for k in buffer_dict.keys():
if (now - k).seconds > config.timeframe:
delete_keys.append(k)
if delete_keys:
for k in delete_keys:
del buffer_dict[k]
self.log.info("Deleted keys: %s" % delete_keys)
if (now - registered_drops.get("last_clear_time")).seconds > config.timeframe + 2:
self.log.info("Clearing registered drops %s" % registered_drops)
registered_drops.get("drops", []).clear()
registered_drops["last_clear_time"] = now
return "Drops cleared."
return "Drops clearing skipped."
def __init__(self, serverID, mcastPort, mcastAddr, serverFile):
Thread.__init__(self)
McastServiceServer.__init__(self,mcastPort,mcastAddr)
self.__serverDict = self.readServerFile(serverFile)
self.__server = int(serverID)
self.__requestList = []
self.__timeoutList = []
self.__log = Log("server%d.log"%self.__server)
self.writeLog(LOGCONTROL,"Iniciando...")
self.getServer().setAlive()
# Sinaliza quando a thread tera que ser fechada
self.__quit = False
def __init__(self):
self.log = Log(file_handler, self.__class__.__name__)
# -*- coding:utf-8 -*-
import os
import logging
import config
from flask import Flask
from misc import Log
app = Flask(__name__)
if not os.path.exists("logs"):
os.mkdir("logs")
file_handler = logging.FileHandler(config.log_config.get("filename"))
file_handler.setLevel(config.log_config.get("level"))
file_handler.setFormatter(config.log_config.get("format"))
log = Log(file_handler, "Binance")
log.info("Binance service started.")
import views
class OnlineCalcServer(McastServiceServer,Thread):
def __init__(self, serverID, mcastPort, mcastAddr, serverFile):
Thread.__init__(self)
McastServiceServer.__init__(self,mcastPort,mcastAddr)
self.__serverDict = self.readServerFile(serverFile)
self.__server = int(serverID)
self.__requestList = []
self.__timeoutList = []
self.__log = Log("server%d.log"%self.__server)
self.writeLog(LOGCONTROL,"Iniciando...")
self.getServer().setAlive()
# Sinaliza quando a thread tera que ser fechada
self.__quit = False
def run(self):
""" Este metodo recebe as mensagens e endereca para o metodo
correto """
# Criando timeout para o heartbeat
self.__createTimeout(self.sendHeartBeat,TOUT_HEARTBEAT)
# Criando timeout para o atualizar status dos servidores
self.__createTimeout(self.updateHeartBeat,TOUT_DEAD)
while not self.__quit:
(data,(ip,port)) = self.getRequest()
Thread(target=self.parserRequest,args=(data,ip,port)).start()
def parserRequest(self, data, ip, port):
""" Recebe uma requisicao e faz o parser executando os metodos
necessarios. """
# Expressoes regulares de possiveis mensagens
reID = "(?P<id>[0-9]+)"
rePORT = "(?P<port>[0-9]{4,5})"
reREQCONF = "(?P<request>.*)"
reREQ = "(?P<request>[0-9()\.\+\-\/\*]*)"
reALIVE = re.compile("^%s:ALIVE$" % reID)
reCONFIRM = re.compile("%s:CONFIRM:%s$" % (reID,reREQCONF))
reREQUEST = re.compile("^%s:%s$"%(rePORT,reREQ))
reQUIT = re.compile("^%s:QUIT$"% reID)
if reALIVE.match(data):
data = reALIVE.search(data)
sid = int(data.group("id"))
self.heartBeatReceived(sid)
elif reCONFIRM.match(data):
data = reCONFIRM.search(data)
serverID = data.group("id")
request = Request(data.group("request"))
self.requestSentby(serverID,request)
elif reREQUEST.match(data):
data = reREQUEST.search(data)
port = data.group("port")
data = "%s:%s:%s" %(ip,port,data.group("request"))
request = Request(data)
self.addRequest(request)
self.sendReply(request)
elif reQUIT.match(data):
data = reQUIT.search(data)
serverID = int(data.group("id"))
self.serverQuiting(serverID)
else:
msg = "Request invalido (%s,%d):%s"%(ip,port,data)
self.writeLog(LOGWARNING,msg)
def __createTimeout(self,method,tout):
tout = Timeout(method,tout)
tout.start()
self.addTimeout(tout)
def serverQuiting(self, serverID):
""" Quando um servidor vai sair seta ele como morto """
if self.getServer() != self.getServerDict()[serverID]:
msg = "Servidor %d desconectou"%( serverID )
self.writeLog(LOGCONTROL,msg)
self.missingHeartBeat(serverID)
def readServerFile(self,serverFile):
""" Le um arquivo contendo os servidores que serao utilizados e
retorna um dicionario {id:Server} """
serverList = {}
for line in open(serverFile):
# Se a linha nao eh um comentario nem vazia
if not re.match("^(#|$)",line):
sid,shostname,sport = line.split()
serverList[int(sid)] = Server(sid,shostname,sport)
return serverList
def writeLog(self,verbose,msg):
""" Escreve uma mensagem no log """
msg = "Server-%d %s"%( self.getServer().getID(),msg )
self.__log.log(verbose,msg)
def addTimeout(self,obj):
self.__timeoutList.append(obj)
def addRequest(self, request):
""" Adiciona uma nova requisicao a lista e a trata """
self.writeLog(LOGMESSAGE,"Request:%s"%request)
self.__requestList.append(request)
def removeRequest(self, request):
""" Remove request da lista """
if request in self.__requestList:
self.__requestList.remove(request)
def requestSentby(self, serverID, request):
""" Confirmacao de que o servidor serverID respondeu a requisicao
request, que deve ser removida da lista """
if int(serverID) != self.getServer().getID():
msg = "Servidor %s Respondeu %s"%(serverID,request)
else:
msg = "Respondi %s"%(request)
self.writeLog(LOGMESSAGE,msg)
self.removeRequest(request)
def heartBeatReceived(self,serverID):
""" Marca servidor serverID como vivo """
if serverID != self.getServer().getID():
self.writeLog(LOGCONTROL,"HeartBeatReceived:%d"%serverID)
self.getServerDict()[int(serverID)].setAlive()
def updateHeartBeat(self):
""" Verifica se algum servidor nao responde a mais de TOUT_DEAD
segundos """
for server in self.getServerDict().values():
if server != self.getServer():
if time.time() - server.getLastContact() > TOUT_DEAD:
self.missingHeartBeat(server.getID())
def missingHeartBeat(self,serverID):
""" Marca servidor serverID como morto """
self.writeLog(LOGCONTROL,"MissingHeartBeat:%d"%serverID)
self.getServerDict()[int(serverID)].setNotAlive()
def sendHeartBeat(self):
""" Envia mensagem ao multicast informando que esta vivo """
self.getMcast().send("%d:ALIVE"%self.getServer().getID())
def whoAnswers(self):
""" Retorna o menor servidor ativo """
for idx in sorted(self.getServerDict().keys()):
server = self.getServerDict()[idx]
if server.imalive():
return self.getServerDict()[idx]
def sendReply(self,request,force=False):
""" Computa request e (se sou o servidor com menor ID vivo)
envia resposta para o cliente, ao mesmo tempo
que comunica os outros servidores do grupo multicast que a
requisicao request foi respondida. """
willAnswer = self.whoAnswers()
if force or willAnswer == self.getServer():
reply = "Server%d "%(self.getServer().getID())
reply += str((self.getServer().getAddr()))+": "
try:
reply += str(eval(request.getRequest()))
except (SyntaxError,TypeError),error:
reply += "ERRO: "+str(error)
except ZeroDivisionError:
reply = "ERRO: Ocorreu uma divisao por zero."
self.writeLog(LOGCONTROL,"Respondendo %s = %s"%(request,reply))
host,port = request.getIP(),request.getPort()
McastServiceServer.sendReply(self,host,port,reply)
self.sendReplyConfirm(request)
