Squashed 'paste-framework/' content from commit 34e8684

git-subtree-dir: paste-framework
git-subtree-split: 34e8684c4bc3cebbe177509f42ab4ef5b5425a7a

examples/03_redis_stream/handler.py

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+import datetime
+import json
+import logging
+
+from paste.core.logging import echo_log
+from paste.db.redis import StreamActor
+from paste.web.decorators import route
+from paste.web.handler import RequestHandler
+
+@route("/stream")
+class MessageHandler(RequestHandler):
+    """
+    演示请求发布 Redis Stream 消息。
+    """
+
+    # 从配置中加载 Stream 配置路径
+    stream_config_path = "redis.streams.demo"
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # 初始化 StreamActor 实例（按配置创建）
+        self.actor = StreamActor.new_actor(self.stream_config_path)
+
+    async def post(self):
+        """
+        接收前端 POST 请求，发布消息到 Redis Stream，立即响应。
+        请求体格式：
+        {
+            "user_id": "123",
+            "event": "login",
+            "data": {"ip": "192.168.1.1"}
+        }
+        """
+        try:
+            # 1. 获取请求参数
+            body = self.request_arguments()
+            user_id = body.get("user_id")
+            event = body.get("event")
+            data = body.get("data", {})
+
+            if not user_id or not event:
+                self.response_error(
+                    Exception("参数缺失：必须提供 user_id 和 event"),
+                    status_code=400,
+                    api_status_code=400
+                )
+                return
+
+            # 2. 构造消息数据
+            message_data = {
+                "user_id": user_id,
+                "event": event,
+                "timestamp": datetime.datetime.now(datetime.timezone.utc).isoformat() + 'Z',
+                "data": json.dumps(data)
+            }
+
+            # 3. 异步发布消息（立即返回，不等待消费）
+            msg_id = await self.actor.publish(message_data)
+
+            # 4. 响应成功
+            self.response_ok(
+                message="消息已成功发布",
+                message_id=msg_id,
+                stream=self.stream_config_path
+            )
+
+        except Exception as e:
+            echo_log('异常', logging.ERROR, True)
+            self.response_error(e, status_code=500, api_status_code=500)