feat: auto complete stock change

sse/admin.py

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+from django.contrib import admin
+
+# Register your models here.

sse/apps.py

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+from django.apps import AppConfig
+
+
+class SseConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'sse'

sse/models.py

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+from django.db import models
+
+# Create your models here.

sse/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

sse/views.py

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+from django.http.response import StreamingHttpResponse
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.response import Response
+from contextlib import suppress
+import asyncio
+
+
+_connections = set()
+
+
+@api_view(['POST'])
+@permission_classes([])
+def create_sse_event(request):
+    """
+    创建一个简单的SSE事件流响应，用于测试和演示目的。
+    """
+
+    def sse_stream():
+        queue = asyncio.Queue()
+        _connections.add(queue)
+
+        try:
+            while True:
+                data = queue.get()
+                yield f"data: {data}\n\n"
+        finally:
+            _connections.remove(queue)
+
+    response = StreamingHttpResponse(sse_stream(), content_type='text/event-stream')
+    response['Cache-Control'] = 'no-cache'
+    return response
+
+
+@api_view(['POST'])
+@permission_classes([])
+def push_sse_event(request):
+    """
+    向所有连接的客户端广播一个SSE事件。
+    请求体应包含一个 'message' 字段，表示要发送的消息内容。
+    """
+    message = request.data.get('message', 'Hello, SSE!')
+    for q in list(_connections):
+        with suppress(asyncio.QueueFull):
+            q.put_nowait(message)
+    return Response({'status': 'message sent'})