fix: Only add demo and a tool class to complete the function

examples/flask_web_api.py

@@ -0,0 +1,119 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+@Time    : 2024/3/27 9:44
+@Author  : leiwu30
+@File    : flask_web_api.py
+@Description    : Stream log information and communicate over the network via web api.
+"""
+import os
+import json
+import socket
+import asyncio
+import threading
+
+from metagpt.team import Team
+from metagpt.const import METAGPT_ROOT
+from metagpt.logs import set_llm_stream_logfunc
+from metagpt.utils.stream_pipe import StreamPipe
+from metagpt.roles.tutorial_assistant import TutorialAssistant
+
+from contextvars import ContextVar
+from flask import Flask, Response
+from flask import request, jsonify, send_from_directory
+
+app = Flask(__name__)
+
+
+def stream_pipe_log(content):
+    print(content, end="")
+    stream_pipe = stream_pipe_var.get(None)
+    if stream_pipe:
+        stream_pipe.set_message(content)
+
+
+def write_tutorial(message):
+    async def main(idea, stream_pipe):
+        stream_pipe_var.set(stream_pipe)
+        role = TutorialAssistant(stream_pipe=stream_pipe)
+        await role.run(idea)
+
+    def thread_run(idea: str, stream_pipe: StreamPipe = None):
+        """
+            Convert asynchronous function to thread function
+        """
+        asyncio.run(main(idea, stream_pipe))
+
+    stream_pipe = StreamPipe()
+    thread = threading.Thread(target=thread_run, args=(message["content"], stream_pipe,))
+    thread.start()
+
+    while thread.is_alive():
+        msg = stream_pipe.get_message()
+        yield stream_pipe.msg2stream(msg)
+
+    # 文件位置
+    # md_file = stream_pipe.get_k_message("file_name")
+    # yield stream_pipe.msg2stream(
+    #     f"\n\n[{os.path.basename(md_file)}](http://{server_address}:{server_port}/download/{md_file})")
+
+
+@app.route('/v1/chat/completions', methods=['POST'])
+def completions():
+    """
+    data: {
+        "model": "write_tutorial",
+        "stream": true,
+        "messages": [
+            {
+                "role": "user",
+                "content": "Write a tutorial about MySQL"
+            }
+        ]
+    }
+    """
+
+    data = json.loads(request.data)
+    print(json.dumps(data, indent=4, ensure_ascii=False))
+
+    # Non-streaming interfaces are not supported yet
+    stream_type = True if "stream" in data.keys() and data["stream"] else False
+    if not stream_type:
+        return jsonify({"status": 200})
+
+    # Only accept the last user information
+    last_message = data["messages"][-1]
+    model = data["model"]
+
+    # write_tutorial
+    if model == "write_tutorial":
+        return Response(write_tutorial(last_message), mimetype="text/plain")
+    else:
+        return jsonify({"status": 200})
+    # return Response(event_stream(), mimetype="text/plain")
+
+
+@app.route('/download/<path:filename>')
+def download_file(filename):
+    return send_from_directory(METAGPT_ROOT, filename, as_attachment=True)
+
+
+if __name__ == "__main__":
+    """
+    curl https://$server_address:$server_port/v1/chat/completions -X POST -d '{
+        "model": "write_tutorial",
+        "stream": true,
+        "messages": [
+          {
+               "role": "user",
+               "content": "Write a tutorial about MySQL"
+          }
+        ]
+    }'
+    """
+    server_port = 7860
+    server_address = socket.gethostbyname(socket.gethostname())
+
+    set_llm_stream_logfunc(stream_pipe_log)
+    stream_pipe_var: ContextVar[StreamPipe] = ContextVar("stream_pipe")
+    app.run(port=server_port, host=server_address)