136 lines
4.2 KiB
Python
136 lines
4.2 KiB
Python
from http.server import BaseHTTPRequestHandler, HTTPServer
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import json
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from urllib.parse import urlparse, parse_qs
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import socket
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import traceback
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import threading # 新增：引入线程锁
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# 全局 Socket 连接字典
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sc_all = {
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"192.168.1.220_6000": None,
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"192.168.1.235_6000": None,
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"192.168.1.225_6000": None,
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"192.168.1.230_6000": None,
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}
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sc_lock = threading.Lock() # 全局锁，保护 sc_all
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def get_checksum(body_msg):
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return sum(body_msg) & 0xFF
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def handle_bytes(arr):
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if len(arr) < 8:
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return f"返回数据长度错误-{arr}"
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if arr[0] != 0xEB or arr[1] != 0x90:
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return "数据头不正确"
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length_arr = arr[2:4][::-1]
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length = int.from_bytes(length_arr, byteorder='little', signed=True)
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if len(arr) < length + 4:
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return f"数据不完整，期望长度:{length+4}，实际长度:{len(arr)}"
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body = arr[4:4 + length - 3]
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check_sum = get_checksum(body)
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if check_sum != arr[length + 1]:
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return "校验错误"
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if arr[length + 2] != 0xFF or arr[length + 3] != 0xFE:
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return "尾错误"
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try:
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content = body.decode('utf-8')
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res = json.loads(content)
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return res[0]
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except Exception as e:
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return f"数据解析错误: {str(e)}"
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class JSONRequestHandler(BaseHTTPRequestHandler):
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def ok(self, data):
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self.send_response(200)
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self.send_header('Content-Type', 'application/json; charset=utf-8')
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self.end_headers()
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self.wfile.write(json.dumps(data, ensure_ascii=False).encode('utf-8'))
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def error(self, err_msg):
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self.send_response(400)
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self.send_header('Content-Type', 'application/json; charset=utf-8')
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self.end_headers()
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data = {"err_msg": err_msg}
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self.wfile.write(json.dumps(data, ensure_ascii=False).encode('utf-8'))
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def do_GET(self):
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parsed_url = urlparse(self.path)
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query_params = parse_qs(parsed_url.query)
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host = query_params.get('host', ['127.0.0.1'])[0]
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port = query_params.get('port', ['6000'])[0]
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addr = f'{host}_{port}'
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if addr not in sc_all:
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self.error(f'{addr} 未找到')
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return
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def connect_and_send():
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with sc_lock: # 加锁，防止竞争
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sc = sc_all[addr]
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try:
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if sc is None:
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sc = socket.socket()
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sc.settimeout(5)
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sc.connect((host, int(port)))
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with sc_lock: # 再次加锁，更新 sc_all
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sc_all[addr] = sc
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sc.settimeout(0.5)
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while True:
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try:
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data = sc.recv(65536)
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if not data:
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break
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except (socket.timeout, BlockingIOError):
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break
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sc.settimeout(5)
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sc.sendall(b"R")
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data = bytearray()
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while len(data) < 8:
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chunk = sc.recv(1024)
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if not chunk:
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raise ConnectionError("连接中断")
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data.extend(chunk)
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return sc, bytes(data)
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except Exception as e:
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if sc is not None:
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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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with sc_lock: # 加锁，清除无效连接
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sc_all[addr] = None
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self.error(f'采集器通信失败: {e}')
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print(traceback.format_exc())
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return None, None
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sc, resp = connect_and_send()
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if sc is None or resp is None:
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return
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res = handle_bytes(resp)
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if isinstance(res, str):
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self.error(res)
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else:
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self.ok(res)
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def run(server_class=HTTPServer, handler_class=JSONRequestHandler, port=2300):
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server_address = ('', port)
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httpd = server_class(server_address, handler_class)
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print(f'Starting httpd server on port {port}...')
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httpd.serve_forever()
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if __name__ == '__main__':
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run() |