update api.py's function and fix bug

api.py

@@ -1,11 +1,10 @@
 from fastapi import FastAPI, Request
 from transformers import AutoTokenizer, AutoModel
-import uvicorn, json, datetime
+import uvicorn, json, datetime, os
 
-app = FastAPI()
+api = FastAPI()
 
-
-@app.post("/")
+@api.post("/")
 async def create_item(request: Request):
     global model, tokenizer
     json_post_raw = await request.json()
@@ -26,10 +25,42 @@ async def create_item(request: Request):
     print(log)
     return answer
 
+@api.post("/clear")
+async def clear_history():
+    global history
+    history = []
+    now = datetime.datetime.now()
+    time = now.strftime("%Y-%m-%d %H:%M:%S")
+    answer = {
+        "response": "history cleared",
+        "status": 200,
+        "time": time
+    }
+    log = "[" + time + "] " + 'History Cleared'
+    print(log)
+    return answer
+
+@api.post("/history")
+async def get_history():
+    global history
+    now = datetime.datetime.now()
+    time = now.strftime("%Y-%m-%d %H:%M:%S")
+    answer = {
+        "response": history,
+        "status": 200,
+        "time": time
+    }
+    log = "[" + time + "] " + 'Get History'
+    print(log)
+    return answer
 
 if __name__ == '__main__':
-    uvicorn.run('api:app', host='0.0.0.0', port=8000, workers=1)
+    try:
+        uvicorn.run('api:api', host='0.0.0.0', port=8000, workers=1)
+    except KeyboardInterrupt:
+        os._exit(0)
 
+history = []
 tokenizer = AutoTokenizer.from_pretrained("THUDM/chatglm-6b", trust_remote_code=True)
 model = AutoModel.from_pretrained("THUDM/chatglm-6b", trust_remote_code=True).half().cuda()
 model.eval()