Artikel berkaitan:https://www.fmz.com/bbs-topic/5569
import _thread
import pymongo
import json
import math
from http.server import HTTPServer, BaseHTTPRequestHandler
from urllib.parse import parse_qs, urlparse
def url2Dict(url):
query = urlparse(url).query
params = parse_qs(query)
result = {key: params[key][0] for key in params}
return result
class Provider(BaseHTTPRequestHandler):
def do_GET(self):
try:
self.send_response(200)
self.send_header("Content-type", "application/json")
self.end_headers()
dictParam = url2Dict(self.path)
Log("自定义数据源服务接收到请求，self.path:", self.path, "query 参数：", dictParam)
# 目前回测系统只能从列表中选择交易所名称，在添加自定义数据源时，设置为币安，即：Binance
exName = exchange.GetName()
# 注意，period为底层K线周期
tabName = "%s_%s" % ("records", int(int(dictParam["period"]) / 1000))
priceRatio = math.pow(10, int(dictParam["round"]))
amountRatio = math.pow(10, int(dictParam["vround"]))
fromTS = int(dictParam["from"]) * int(1000)
toTS = int(dictParam["to"]) * int(1000)
# 连接数据库
Log("连接数据库服务，获取数据，数据库：", exName, "表：", tabName)
myDBClient = pymongo.MongoClient("mongodb://localhost:27017")
ex_DB = myDBClient[exName]
exRecords = ex_DB[tabName]
# 要求应答的数据
data = {
"schema" : ["time", "open", "high", "low", "close", "vol"],
"data" : []
}
# 构造查询条件：大于某个值{'age': {'$gt': 20}} 小于某个值{'age': {'$lt': 20}}
dbQuery = {"$and":[{'Time': {'$gt': fromTS}}, {'Time': {'$lt': toTS}}]}
Log("查询条件：", dbQuery, "查询条数：", exRecords.find(dbQuery).count(), "数据库总条数：", exRecords.find().count())
for x in exRecords.find(dbQuery).sort("Time"):
# 需要根据请求参数round和vround，处理数据精度
bar = [x["Time"], int(x["Open"] * priceRatio), int(x["High"] * priceRatio), int(x["Low"] * priceRatio), int(x["Close"] * priceRatio), int(x["Volume"] * amountRatio)]
data["data"].append(bar)
Log("数据：", data, "响应回测系统请求。")
# 写入数据应答
self.wfile.write(json.dumps(data).encode())
except BaseException as e:
Log("Provider do_GET error, e:", e)
def createServer(host):
try:
server = HTTPServer(host, Provider)
Log("Starting server, listen at: %s:%s" % host)
server.serve_forever()
except BaseException as e:
Log("createServer error, e:", e)
raise Exception("stop")
def main():
LogReset(1)
exName = exchange.GetName()
period = exchange.GetPeriod()
Log("收集", exName, "交易所的K线数据，", "K线周期:", period, "秒")
# 连接数据库服务，服务地址 mongodb://127.0.0.1:27017 具体看服务器上安装的mongodb设置
Log("连接托管者所在设备mongodb服务，mongodb://localhost:27017")
myDBClient = pymongo.MongoClient("mongodb://localhost:27017")
# 创建数据库
ex_DB = myDBClient[exName]
# 打印目前数据库表
collist = ex_DB.list_collection_names()
Log("mongodb ", exName, " collist:", collist)
# 检测是否删除表
arrDropNames = json.loads(dropNames)
if isinstance(arrDropNames, list):
for i in range(len(arrDropNames)):
dropName = arrDropNames[i]
if isinstance(dropName, str):
if not dropName in collist:
continue
tab = ex_DB[dropName]
Log("dropName:", dropName, "删除：", dropName)
ret = tab.drop()
collist = ex_DB.list_collection_names()
if dropName in collist:
Log(dropName, "删除失败")
else :
Log(dropName, "删除成功")
# 开启一个线程，提供自定义数据源服务
try:
# _thread.start_new_thread(createServer, (("localhost", 9090), )) # 本机测试
_thread.start_new_thread(createServer, (("0.0.0.0", 9090), )) # VPS服务器上测试
Log("开启自定义数据源服务线程", "#FF0000")
except BaseException as e:
Log("启动自定义数据源服务失败！")
Log("错误信息：", e)
raise Exception("stop")
# 创建records表
ex_DB_Records = ex_DB["%s_%d" % ("records", period)]
Log("开始收集", exName, "K线数据", "周期：", period, "打开（创建）数据库表：", "%s_%d" % ("records", period), "#FF0000")
preBarTime = 0
index = 1
while True:
r = _C(exchange.GetRecords)
if len(r) < 2:
Sleep(1000)
continue
if preBarTime == 0:
# 首次写入所有BAR数据
for i in range(len(r) - 1):
bar = r[i]
# 逐根写入，需要判断当前数据库表中是否已经有该条数据，基于时间戳检测，如果有该条数据，则跳过，没有则写入
retQuery = ex_DB_Records.find({"Time": bar["Time"]})
if retQuery.count() > 0:
continue
# 写入bar到数据库表
ex_DB_Records.insert_one({"High": bar["High"], "Low": bar["Low"], "Open": bar["Open"], "Close": bar["Close"], "Time": bar["Time"], "Volume": bar["Volume"]})
index += 1
preBarTime = r[-1]["Time"]
elif preBarTime != r[-1]["Time"]:
bar = r[-2]
# 写入数据前检测，数据是否已经存在，基于时间戳检测
retQuery = ex_DB_Records.find({"Time": bar["Time"]})
if retQuery.count() > 0:
continue
ex_DB_Records.insert_one({"High": bar["High"], "Low": bar["Low"], "Open": bar["Open"], "Close": bar["Close"], "Time": bar["Time"], "Volume": bar["Volume"]})
index += 1
preBarTime = r[-1]["Time"]
LogStatus(_D(), "preBarTime:", preBarTime, "_D(preBarTime):", _D(preBarTime/1000), "index:", index)
# 增加画图展示
ext.PlotRecords(r, "%s_%d" % ("records", period))
Sleep(10000)