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https://github.com/open-webui/pipelines
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110 lines
3.9 KiB
Python
110 lines
3.9 KiB
Python
"""
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title: MLX Pipeline
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author: justinh-rahb
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date: 2024-05-27
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version: 1.1
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license: MIT
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description: A pipeline for generating text using Apple MLX Framework.
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requirements: requests, mlx-lm, huggingface-hub
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environment_variables: MLX_HOST, MLX_PORT, MLX_MODEL, MLX_STOP, MLX_SUBPROCESS, HUGGINGFACE_TOKEN
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"""
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from typing import List, Union, Generator, Iterator
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from schemas import OpenAIChatMessage
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import requests
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import os
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import subprocess
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import logging
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from huggingface_hub import login
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class Pipeline:
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def __init__(self):
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# Optionally, you can set the id and name of the pipeline.
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# Assign a unique identifier to the pipeline.
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# The identifier must be unique across all pipelines.
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# The identifier must be an alphanumeric string that can include underscores or hyphens. It cannot contain spaces, special characters, slashes, or backslashes.
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self.id = "mlx_pipeline"
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self.name = "MLX Pipeline"
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self.host = os.getenv("MLX_HOST", "localhost")
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self.port = os.getenv("MLX_PORT", "8080")
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self.model = os.getenv("MLX_MODEL", "mistralai/Mistral-7B-Instruct-v0.2")
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self.stop_sequence = os.getenv("MLX_STOP", "[INST]").split(
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","
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) # Default stop sequence is [INST]
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self.subprocess = os.getenv("MLX_SUBPROCESS", "true").lower() == "true"
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self.huggingface_token = os.getenv("HUGGINGFACE_TOKEN", None)
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if self.huggingface_token:
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login(self.huggingface_token)
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if self.subprocess:
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self.start_mlx_server()
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def start_mlx_server(self):
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if not os.getenv("MLX_PORT"):
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self.port = self.find_free_port()
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command = f"mlx_lm.server --model {self.model} --port {self.port}"
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self.server_process = subprocess.Popen(command, shell=True)
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logging.info(f"Started MLX server on port {self.port}")
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def find_free_port(self):
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import socket
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(("", 0))
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port = s.getsockname()[1]
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s.close()
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return port
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async def on_startup(self):
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logging.info(f"on_startup:{__name__}")
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async def on_shutdown(self):
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if self.subprocess and hasattr(self, "server_process"):
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self.server_process.terminate()
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logging.info(f"Terminated MLX server on port {self.port}")
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def pipe(
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self, user_message: str, model_id: str, messages: List[dict], body: dict
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) -> Union[str, Generator, Iterator]:
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logging.info(f"pipe:{__name__}")
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url = f"http://{self.host}:{self.port}/v1/chat/completions"
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headers = {"Content-Type": "application/json"}
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# Extract and validate parameters from the request body
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max_tokens = body.get("max_tokens", 4096)
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if not isinstance(max_tokens, int) or max_tokens < 0:
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max_tokens = 4096 # Default to 4096 if invalid
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temperature = body.get("temperature", 0.8)
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if not isinstance(temperature, (int, float)) or temperature < 0:
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temperature = 0.8 # Default to 0.8 if invalid
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repeat_penalty = body.get("repeat_penalty", 1.0)
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if not isinstance(repeat_penalty, (int, float)) or repeat_penalty < 0:
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repeat_penalty = 1.0 # Default to 1.0 if invalid
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payload = {
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"messages": messages,
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"max_tokens": max_tokens,
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"temperature": temperature,
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"repetition_penalty": repeat_penalty,
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"stop": self.stop_sequence,
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"stream": body.get("stream", False),
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}
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try:
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r = requests.post(
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url, headers=headers, json=payload, stream=body.get("stream", False)
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)
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r.raise_for_status()
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if body.get("stream", False):
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return r.iter_lines()
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else:
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return r.json()
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except Exception as e:
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return f"Error: {e}"
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