use minio to store uploaded files; build dialog server; (#16)

* format code

* use minio to store uploaded files; build dialog server;

python/llm/chat_model.py

@@ -0,0 +1,34 @@
+from abc import ABC
+import openapi
+import os
+
+class Base(ABC):
+    def chat(self, system, history, gen_conf):
+        raise NotImplementedError("Please implement encode method!")
+
+
+class GptTurbo(Base):
+    def __init__(self):
+        openapi.api_key = os.environ["OPENAPI_KEY"]
+
+    def chat(self, system, history, gen_conf):
+        history.insert(0, {"role": "system", "content": system})
+        res = openapi.ChatCompletion.create(model="gpt-3.5-turbo",
+                                           messages=history,
+                                          **gen_conf)
+        return res.choices[0].message.content.strip()
+
+
+class QWen(Base):
+    def chat(self, system, history, gen_conf):
+        from http import HTTPStatus
+        from dashscope import Generation
+        from dashscope.api_entities.dashscope_response import Role
+        response = Generation.call(
+                    Generation.Models.qwen_turbo,
+                    messages=messages,
+                    result_format='message'
+        )
+        if response.status_code == HTTPStatus.OK:
+            return response.output.choices[0]['message']['content']
+        return response.message