fix: get_tyy_data方法调整

apps/em/cd.py

@@ -271,23 +271,41 @@ def get_svs_char(host, port, flow_unit=0, timeout=10):
     """连接 SVS（维视智造 VisionBank），用 VTFP 触发拍照并取回识别字符。
 
     返回 ``{"char": 识别字符, "fields": [...], "raw": 原始应答行}``。
+
+    不同流程的输出配置可能不一样：有的回 ``VTFP 0 <数据>`` 完整应答，有的只回
+    用户自定义的识别内容(如 ``1``)。这里读到第一行完整数据就返回：带 ``VTFP``
+    前缀的按协议解析，否则整行当作识别内容。
     """
-    cmd = f"VTFP {flow_unit}\r\n".encode("ascii")
+    cmd = f"VTFP {flow_unit}\r".encode("ascii")  # 该设备只认单 CR 结尾, 带 \n 会无响应
     try:
         with socket.create_connection((host, int(port)), timeout=timeout) as sc:
-            sc.sendall(cmd)
             buf = bytearray()
-            while True:
-                chunk = sc.recv(1024)
-                if not chunk:
-                    break
+            sc.sendall(cmd)
+            # 第一次用完整超时等设备响应; 设备返回的识别内容(如 b'1')末尾可能没有
+            # 换行符, 因此拿到数据后只用很短的超时把剩余字节收干净(兼容多位数分包),
+            # 不再死等换行, 否则会卡到超时
+            chunk = sc.recv(1024)
+            if chunk:
                 buf.extend(chunk)
-                text = buf.decode("utf-8", errors="replace")
-                # VTFP 应答前可能先收到 VGIF 等行，定位到 VTFP 那一行再解析
-                for ln in text.split("\r\n"):
-                    if ln.startswith("VTFP"):
-                        char, fields = _parse_vtfp_line(ln)
-                        return {"char": char, "fields": fields, "raw": ln}
+                sc.settimeout(0.3)
+                while b"\n" not in buf and b"\r" not in buf:
+                    try:
+                        more = sc.recv(1024)
+                    except socket.timeout:
+                        break
+                    if not more:
+                        break
+                    buf.extend(more)
+            text = buf.decode("utf-8", errors="replace")
+            for ln in re.split(r"[\r\n]+", text):
+                ln = ln.strip()
+                if not ln:
+                    continue
+                if ln.upper().startswith("VTFP"):
+                    char, fields = _parse_vtfp_line(ln)
+                    return {"char": char, "fields": fields, "raw": ln}
+                # 无 VTFP 前缀，设备直接回识别内容
+                return {"char": ln, "fields": ln.split(), "raw": ln}
     except ParseError:
         raise
     except (socket.timeout, ConnectionError, OSError) as e:

apps/em/views.py

@@ -14,6 +14,7 @@ from rest_framework.decorators import action
 from rest_framework.serializers import Serializer
 from django.db import transaction
 from apps.em.services import daoru_equipment
+from apps.em import cd
 from rest_framework.response import Response
 from django.conf import settings
 from django.db.models import Count, Case, When, IntegerField
@@ -127,6 +128,26 @@ class EquipmentViewSet(CustomModelViewSet):
 
         return Response(json_result)
 
+    @swagger_auto_schema(
+        manual_parameters=[
+            openapi.Parameter(name="host", in_=openapi.IN_QUERY, description="SVS IP", type=openapi.TYPE_STRING, required=True),
+            openapi.Parameter(name="port", in_=openapi.IN_QUERY, description="SVS 端口", type=openapi.TYPE_STRING, required=True),
+            openapi.Parameter(name="flow_unit", in_=openapi.IN_QUERY, description="识别码(流程单元号), 多台 SVS 共用 IP 时用于区分设备", type=openapi.TYPE_STRING, required=True),
+        ]
+    )
+    @action(methods=["get"], detail=False, perms_map={"get": "*"})
+    def get_svs_char(self, request, *args, **kwargs):
+        """获取 SVS 识别字符
+
+        触发 SVS 拍照并取回识别字符, flow_unit 为识别码用于区分共用 IP 的不同设备
+        """
+        host = request.query_params.get("host", None)
+        port = request.query_params.get("port", None)
+        if not host or not port:
+            raise ParseError("请传入host和port参数")
+        flow_unit = request.query_params.get("flow_unit", 0)
+        return Response(cd.get_svs_char(host, port, flow_unit))
+
 
 class EcheckRecordViewSet(ListModelMixin, CreateModelMixin, DestroyModelMixin, CustomGenericViewSet):
     """