121 lines
3.1 KiB
Python
121 lines
3.1 KiB
Python
import json
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import os
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import threading
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import click
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from llama_cpp import Llama
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from flask import Flask, Response, stream_with_context, request
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from flask_cors import CORS
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app = Flask(__name__)
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CORS(app) # enable CORS for all routes
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# llms tracks which models are loaded
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llms = {}
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lock = threading.Lock()
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def load(model):
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with lock:
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if not os.path.exists(f"./models/{model}.bin"):
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return {"error": "The model does not exist."}
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if model not in llms:
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llms[model] = Llama(model_path=f"./models/{model}.bin")
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return None
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def unload(model):
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with lock:
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if not os.path.exists(f"./models/{model}.bin"):
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return {"error": "The model does not exist."}
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llms.pop(model, None)
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return None
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def generate(model, prompt):
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# auto load
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error = load(model)
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if error is not None:
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return error
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stream = llms[model](
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str(prompt), # TODO: optimize prompt based on model
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max_tokens=4096,
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stop=["Q:", "\n"],
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echo=True,
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stream=True,
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)
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for output in stream:
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yield json.dumps(output)
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def models():
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all_files = os.listdir("./models")
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bin_files = [
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file.replace(".bin", "") for file in all_files if file.endswith(".bin")
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]
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return bin_files
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@app.route("/load", methods=["POST"])
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def load_route_handler():
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data = request.get_json()
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model = data.get("model")
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if not model:
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return Response("Model is required", status=400)
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error = load(model)
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if error is not None:
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return error
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return Response(status=204)
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@app.route("/unload", methods=["POST"])
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def unload_route_handler():
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data = request.get_json()
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model = data.get("model")
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if not model:
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return Response("Model is required", status=400)
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error = unload(model)
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if error is not None:
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return error
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return Response(status=204)
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@app.route("/generate", methods=["POST"])
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def generate_route_handler():
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data = request.get_json()
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model = data.get("model")
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prompt = data.get("prompt")
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if not model:
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return Response("Model is required", status=400)
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if not prompt:
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return Response("Prompt is required", status=400)
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if not os.path.exists(f"./models/{model}.bin"):
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return {"error": "The model does not exist."}, 400
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return Response(
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stream_with_context(generate(model, prompt)), mimetype="text/event-stream"
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)
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@app.route("/models", methods=["GET"])
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def models_route_handler():
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bin_files = models()
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return Response(json.dumps(bin_files), mimetype="application/json")
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@click.group(invoke_without_command=True)
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@click.pass_context
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def cli(ctx):
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# allows the script to respond to command line input when executed directly
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if ctx.invoked_subcommand is None:
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click.echo(ctx.get_help())
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@cli.command()
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@click.option("--port", default=5000, help="Port to run the server on")
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@click.option("--debug", default=False, help="Enable debug mode")
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def serve(port, debug):
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print("Serving on http://localhost:{port}")
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app.run(host="0.0.0.0", port=port, debug=debug)
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if __name__ == "__main__":
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cli()
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