增加web channel

channel/web/web_channel.py

@@ -0,0 +1,204 @@
+import sys
+import time
+import web
+import json
+from queue import Queue
+from bridge.context import *
+from bridge.reply import Reply, ReplyType
+from channel.chat_channel import ChatChannel, check_prefix
+from channel.chat_message import ChatMessage
+from common.log import logger
+from common.singleton import singleton
+from config import conf
+import os
+
+
+class WebMessage(ChatMessage):
+    def __init__(
+        self,
+        msg_id,
+        content,
+        ctype=ContextType.TEXT,
+        from_user_id="User",
+        to_user_id="Chatgpt",
+        other_user_id="Chatgpt",
+    ):
+        self.msg_id = msg_id
+        self.ctype = ctype
+        self.content = content
+        self.from_user_id = from_user_id
+        self.to_user_id = to_user_id
+        self.other_user_id = other_user_id
+
+
+@singleton
+class WebChannel(ChatChannel):
+    NOT_SUPPORT_REPLYTYPE = [ReplyType.VOICE]
+    _instance = None
+    
+    # def __new__(cls):
+    #     if cls._instance is None:
+    #         cls._instance = super(WebChannel, cls).__new__(cls)
+    #     return cls._instance
+
+    def __init__(self):
+        super().__init__()
+        self.message_queues = {}  # 为每个用户存储一个消息队列
+        self.msg_id_counter = 0  # 添加消息ID计数器
+
+    def _generate_msg_id(self):
+        """生成唯一的消息ID"""
+        self.msg_id_counter += 1
+        return str(int(time.time())) + str(self.msg_id_counter)
+
+    def send(self, reply: Reply, context: Context):
+        try:
+            if reply.type == ReplyType.IMAGE:
+                from PIL import Image
+
+                image_storage = reply.content
+                image_storage.seek(0)
+                img = Image.open(image_storage)
+                print("<IMAGE>")
+                img.show()
+            elif reply.type == ReplyType.IMAGE_URL:
+                import io
+
+                import requests
+                from PIL import Image
+
+                img_url = reply.content
+                pic_res = requests.get(img_url, stream=True)
+                image_storage = io.BytesIO()
+                for block in pic_res.iter_content(1024):
+                    image_storage.write(block)
+                image_storage.seek(0)
+                img = Image.open(image_storage)
+                print(img_url)
+                img.show()
+            else:
+                print(reply.content)
+
+            # 获取用户ID，如果没有则使用默认值
+            # user_id = getattr(context.get("session", None), "session_id", "default_user")
+            user_id = context["receiver"]
+            # 确保用户有对应的消息队列
+            if user_id not in self.message_queues:
+                self.message_queues[user_id] = Queue()
+                
+            # 将消息放入对应用户的队列
+            message_data = {
+                "type": str(reply.type),
+                "content": reply.content,
+                "timestamp": time.time()
+            }
+            self.message_queues[user_id].put(message_data)
+            logger.debug(f"Message queued for user {user_id}")
+            
+        except Exception as e:
+            logger.error(f"Error in send method: {e}")
+            raise
+
+    def sse_handler(self, user_id):
+        """
+        Handle Server-Sent Events (SSE) for real-time communication.
+        """
+        web.header('Content-Type', 'text/event-stream')
+        web.header('Cache-Control', 'no-cache')
+        web.header('Connection', 'keep-alive')
+        
+        # 确保用户有消息队列
+        if user_id not in self.message_queues:
+            self.message_queues[user_id] = Queue()
+        
+        try:    
+            while True:
+                try:
+                    # 发送心跳
+                    yield f": heartbeat\n\n"
+                    
+                    # 非阻塞方式获取消息
+                    if not self.message_queues[user_id].empty():
+                        message = self.message_queues[user_id].get_nowait()
+                        yield f"data: {json.dumps(message)}\n\n"
+                    time.sleep(0.5)
+                except Exception as e:
+                    logger.error(f"SSE Error: {e}")
+                    break
+        finally:
+            # 清理资源
+            if user_id in self.message_queues:
+                # 只有当队列为空时才删除
+                if self.message_queues[user_id].empty():
+                    del self.message_queues[user_id]
+
+    def post_message(self):
+        """
+        Handle incoming messages from users via POST request.
+        """
+        try:
+            data = web.data()  # 获取原始POST数据
+            json_data = json.loads(data)
+            user_id = json_data.get('user_id', 'default_user')
+            prompt = json_data.get('message', '')
+        except json.JSONDecodeError:
+            return json.dumps({"status": "error", "message": "Invalid JSON"})
+        except Exception as e:
+            return json.dumps({"status": "error", "message": str(e)})
+        
+        if not prompt:
+            return json.dumps({"status": "error", "message": "No message provided"})
+            
+        try:
+            msg_id = self._generate_msg_id()
+            context = self._compose_context(ContextType.TEXT, prompt, msg=WebMessage(msg_id, 
+                                                                                     prompt,
+                                                                                     from_user_id=user_id,
+                                                                                     other_user_id = user_id
+                                                                                     ))
+            context["isgroup"] = False
+            # context["session"] = web.storage(session_id=user_id)
+            
+            if not context:
+                return json.dumps({"status": "error", "message": "Failed to process message"})
+                
+            self.produce(context)
+            return json.dumps({"status": "success", "message": "Message received"})
+            
+        except Exception as e:
+            logger.error(f"Error processing message: {e}")
+            return json.dumps({"status": "error", "message": "Internal server error"})
+
+    def chat_page(self):
+        """Serve the chat HTML page."""
+        file_path = os.path.join(os.path.dirname(__file__), 'chat.html')  # 使用绝对路径
+        with open(file_path, 'r', encoding='utf-8') as f:
+            return f.read()
+
+    def startup(self):
+        logger.setLevel("WARN")
+        print("\nWeb Channel is running. Send POST requests to /message to send messages.")
+        
+        urls = (
+            '/sse/(.+)', 'SSEHandler',  # 修改路由以接收用户ID
+            '/message', 'MessageHandler',
+            '/chat', 'ChatHandler', 
+        )
+        port = conf().get("web_port", 9899)
+        app = web.application(urls, globals(), autoreload=False)
+        web.httpserver.runsimple(app.wsgifunc(), ("0.0.0.0", port))
+
+
+class SSEHandler:
+    def GET(self, user_id):
+        return WebChannel().sse_handler(user_id)
+
+
+class MessageHandler:
+    def POST(self):
+        return WebChannel().post_message()
+
+
+class ChatHandler:
+    def GET(self):
+        return WebChannel().chat_page()