feat: get_tyy_data优化

apps/em/cd.py

@@ -1,26 +1,42 @@
 import socket
 from rest_framework.exceptions import ParseError
 import json
+import time
 
 def get_tyy_data(*args):
-    sc = socket.socket()
-    try:
-        sc.connect((args[0], int(args[1])))
-    except Exception:
-        raise ParseError("无法连接到采集器")
-    sc.send(b"R")
-    resp = sc.recv(1024)
-    if len(resp) < 8:
-        raise ParseError("设备未启动")
-    try:
-        json_data = resp[5:-4]
-        json_str = json_data.decode('utf-8')
-        res = json.loads(json_str)
-    except Exception:
-        raise
-    finally:
-        sc.close()
-    return res
+    host, port = args[0], args[1]
+    max_retries = 3
+    retry_delay = 0.5
+
+    for attempt in range(max_retries):
+        sc = None
+        try:
+            sc = socket.socket()
+            sc.connect((host, int(port)))
+            sc.sendall(b"R")
+            resp = sc.recv(1024)
+            if not resp:
+                raise ParseError("采集器返回空数据")
+            if len(resp) < 8:
+                raise ParseError("设备未启动")
+            json_data = resp[5:-4]
+            json_str = json_data.decode('utf-8')
+            res = json.loads(json_str)
+            return res
+        except ConnectionResetError:
+                if attempt == max_retries - 1:
+                    raise ParseError("采集器重置了连接，重试次数已达上限")
+                time.sleep(retry_delay)
+        except socket.timeout:
+            raise ParseError("采集器连接超时")
+        except Exception as e:
+            raise ParseError(f"未知错误: {str(e)}")
+        finally:
+            if sc:
+                try:
+                    sc.close()
+                except Exception:
+                    pass
 
 if __name__ == '__main__':
     print(get_tyy_data())