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https://github.com/open-webui/pipelines
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155 lines
4.6 KiB
Python
155 lines
4.6 KiB
Python
"""
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title: Cohere Manifold Pipeline
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author: justinh-rahb
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date: 2024-05-28
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version: 1.0
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license: MIT
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description: A pipeline for generating text using the Anthropic API.
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requirements: requests
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environment_variables: COHERE_API_KEY
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"""
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import os
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import json
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from schemas import OpenAIChatMessage
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from typing import List, Union, Generator, Iterator
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from pydantic import BaseModel
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import requests
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class Pipeline:
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class Valves(BaseModel):
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COHERE_API_BASE_URL: str = "https://api.cohere.com/v1"
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COHERE_API_KEY: str = ""
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def __init__(self):
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self.type = "manifold"
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self.id = "cohere"
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self.name = "cohere/"
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self.valves = self.Valves(**{"COHERE_API_KEY": os.getenv("COHERE_API_KEY")})
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self.pipelines = self.get_cohere_models()
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async def on_startup(self):
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print(f"on_startup:{__name__}")
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pass
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async def on_shutdown(self):
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print(f"on_shutdown:{__name__}")
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pass
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async def on_valves_updated(self):
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# This function is called when the valves are updated.
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self.pipelines = self.get_cohere_models()
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pass
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def get_cohere_models(self):
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if self.valves.COHERE_API_KEY:
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try:
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headers = {}
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headers["Authorization"] = f"Bearer {self.valves.COHERE_API_KEY}"
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headers["Content-Type"] = "application/json"
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r = requests.get(
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f"{self.valves.COHERE_API_BASE_URL}/models", headers=headers
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)
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models = r.json()
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return [
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{
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"id": model["name"],
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"name": model["name"] if "name" in model else model["name"],
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}
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for model in models["models"]
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]
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except Exception as e:
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print(f"Error: {e}")
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return [
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{
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"id": self.id,
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"name": "Could not fetch models from Cohere, please update the API Key in the valves.",
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},
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]
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else:
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return []
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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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try:
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if body.get("stream", False):
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return self.stream_response(user_message, model_id, messages, body)
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else:
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return self.get_completion(user_message, model_id, messages, body)
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except Exception as e:
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return f"Error: {e}"
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def stream_response(
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self, user_message: str, model_id: str, messages: List[dict], body: dict
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) -> Generator:
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headers = {}
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headers["Authorization"] = f"Bearer {self.valves.COHERE_API_KEY}"
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headers["Content-Type"] = "application/json"
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r = requests.post(
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url=f"{self.valves.COHERE_API_BASE_URL}/chat",
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json={
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"model": model_id,
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"chat_history": [
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{
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"role": "USER" if message["role"] == "user" else "CHATBOT",
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"message": message["content"],
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}
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for message in messages[:-1]
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],
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"message": user_message,
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"stream": True,
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},
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headers=headers,
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stream=True,
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)
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r.raise_for_status()
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for line in r.iter_lines():
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if line:
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try:
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line = json.loads(line)
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if line["event_type"] == "text-generation":
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yield line["text"]
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except:
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pass
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def get_completion(
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self, user_message: str, model_id: str, messages: List[dict], body: dict
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) -> str:
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headers = {}
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headers["Authorization"] = f"Bearer {self.valves.COHERE_API_KEY}"
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headers["Content-Type"] = "application/json"
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r = requests.post(
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url=f"{self.valves.COHERE_API_BASE_URL}/chat",
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json={
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"model": model_id,
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"chat_history": [
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{
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"role": "USER" if message["role"] == "user" else "CHATBOT",
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"message": message["content"],
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}
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for message in messages[:-1]
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],
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"message": user_message,
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},
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headers=headers,
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)
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r.raise_for_status()
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data = r.json()
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return data["text"] if "text" in data else "No response from Cohere."
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