77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
import socket
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from rest_framework.exceptions import ParseError
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import json
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import time
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from django.core.cache import cache
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from apps.utils.thread import MyThread
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def get_tyy_data_t(host, port):
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cd_thread_key = f"cd_thread_{host}_{port}"
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sc = None
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def connect():
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nonlocal sc
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try:
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sc = socket.socket()
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sc.connect((host, int(port)))
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except OSError as e:
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cache.set(cd_thread_key, {"err_msg": f"采集器连接失败-{str(e)}"})
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except ConnectionResetError:
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cache.set(cd_thread_key, {"err_msg": "采集器重置了连接"})
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except socket.timeout:
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cache.set(cd_thread_key, {"err_msg": "采集器连接超时"})
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while True:
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cd_thread_val = cache.get(cd_thread_key, default=None)
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if cd_thread_val is None:
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if sc:
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try:
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sc.close()
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except Exception:
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pass
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break
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elif cd_thread_val == "get":
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if sc is None:
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connect()
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try:
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sc.sendall(b"R")
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except BrokenPipeError:
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try:
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sc.close()
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except Exception:
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pass
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connect()
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resp = sc.recv(1024)
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if not resp:
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cache.set(cd_thread_key, {"err_msg": f"采集器返回空数据-{str(resp)}"})
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elif len(resp) < 8:
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cache.set(cd_thread_key, {"err_msg": f"设备未启动-{str(resp)}"})
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else:
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json_data = resp[5:-4]
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json_str = json_data.decode('utf-8')
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res = json.loads(json_str)
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cache.set(cd_thread_key, res)
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time.sleep(0.3)
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def get_tyy_data(*args):
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host, port = args[0], int(args[1])
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cd_thread_key = f"cd_thread_{host}_{port}"
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cd_thread_val = cache.get(cd_thread_key, default=None)
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if cd_thread_val is None:
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cache.set(cd_thread_key, "get")
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cd_thread = MyThread(target=get_tyy_data_t, args=(host, port), daemon=True)
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cd_thread.start()
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num = 0
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while True:
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num += 1
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if num > 8:
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break
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val = cache.get(cd_thread_key)
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if isinstance(val, dict):
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if "err_msg" in val:
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raise ParseError(val["err_msg"])
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return val
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time.sleep(0.3)
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raise ParseError("获取数据超时")
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if __name__ == '__main__':
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print(get_tyy_data()) |