mirror of
https://github.com/hexastack/hexabot
synced 2024-11-24 04:53:41 +00:00
104 lines
3.6 KiB
Python
104 lines
3.6 KiB
Python
# from typing import Union
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import asyncio
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import os
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from typing import Annotated, Union
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from fastapi.responses import JSONResponse
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import boilerplate as tfbp
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from fastapi import Depends, FastAPI, HTTPException, status
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from pydantic import BaseModel
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import logging
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# Set up logging configuration
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logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
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AUTH_TOKEN = os.getenv("AUTH_TOKEN", "TOKEN_MUST_BE_DEFINED")
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AVAILABLE_LANGUAGES = os.getenv("AVAILABLE_LANGUAGES", "en,fr").split(',')
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TFLC_REPO_ID = os.getenv("TFLC_REPO_ID")
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INTENT_CLASSIFIER_REPO_ID = os.getenv("INTENT_CLASSIFIER_REPO_ID")
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SLOT_FILLER_REPO_ID = os.getenv("SLOT_FILLER_REPO_ID")
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def load_language_classifier():
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# Init language classifier model
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Model = tfbp.get_model("tflc")
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kwargs = {}
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model = Model("", method="predict", repo_id=TFLC_REPO_ID, **kwargs)
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model.load_model()
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logging.info(f'Successfully loaded the language classifier model')
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return model
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def load_intent_classifiers():
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Model = tfbp.get_model("intent_classifier")
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intent_classifiers = {}
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for language in AVAILABLE_LANGUAGES:
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kwargs = {}
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intent_classifiers[language] = Model(save_dir=language, method="predict", repo_id=INTENT_CLASSIFIER_REPO_ID, **kwargs)
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intent_classifiers[language].load_model()
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logging.info(f'Successfully loaded the intent classifier {language} model')
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return intent_classifiers
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def load_slot_classifiers():
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Model = tfbp.get_model("slot_classifier")
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slot_fillers = {}
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for language in AVAILABLE_LANGUAGES:
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kwargs = {}
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slot_fillers[language] = Model(save_dir=language, method="predict", repo_id=SLOT_FILLER_REPO_ID, **kwargs)
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slot_fillers[language].load_model()
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logging.info(f'Successfully loaded the slot filler {language} model')
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return slot_fillers
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def load_models():
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app.language_classifier = load_language_classifier() # type: ignore
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app.intent_classifiers = load_intent_classifiers() # type: ignore
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app.slot_fillers = load_intent_classifiers() # type: ignore
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app = FastAPI()
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def authenticate(
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token: str
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):
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if token != AUTH_TOKEN:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Unauthorized access",
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)
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return True
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class ParseInput(BaseModel):
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q: str
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project: Union[str, None] = None
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@app.on_event("startup")
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async def startup_event():
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asyncio.create_task(asyncio.to_thread(load_models))
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@app.get("/health", status_code=200,)
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async def check_health():
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return "Startup checked"
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@app.post("/parse")
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def parse(input: ParseInput, is_authenticated: Annotated[str, Depends(authenticate)]):
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if not hasattr(app, 'language_classifier') or not hasattr(app, 'intent_classifiers') or not hasattr(app, 'slot_fillers'):
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headers = {"Retry-After": "120"} # Suggest retrying after 2 minutes
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return JSONResponse(status_code=status.HTTP_503_SERVICE_UNAVAILABLE, content={"message": "Models are still loading, please retry later."}, headers=headers)
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language_prediction = app.language_classifier.get_prediction(input.q) # type: ignore
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language = language_prediction.get("value")
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intent_prediction = app.intent_classifiers[language].get_prediction(
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input.q) # type: ignore
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slot_prediction = app.slot_fillers[language].get_prediction(
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input.q) # type: ignore
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slot_prediction.get("entities").append(language_prediction)
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return {
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"text": input.q,
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"intent": intent_prediction.get("intent"),
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"entities": slot_prediction.get("entities"),
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}
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