mirror of
https://github.com/open-webui/pipelines
synced 2025-05-11 08:01:08 +00:00
155 lines
4.6 KiB
Python
155 lines
4.6 KiB
Python
"""
|
|
title: Cohere Manifold Pipeline
|
|
author: justinh-rahb
|
|
date: 2024-05-28
|
|
version: 1.0
|
|
license: MIT
|
|
description: A pipeline for generating text using the Anthropic API.
|
|
requirements: requests
|
|
environment_variables: COHERE_API_KEY
|
|
"""
|
|
|
|
import os
|
|
import json
|
|
from schemas import OpenAIChatMessage
|
|
from typing import List, Union, Generator, Iterator
|
|
from pydantic import BaseModel
|
|
import requests
|
|
|
|
|
|
class Pipeline:
|
|
def __init__(self):
|
|
self.type = "manifold"
|
|
self.id = "cohere"
|
|
self.name = "cohere/"
|
|
|
|
class Valves(BaseModel):
|
|
COHERE_API_BASE_URL: str = "https://api.cohere.com/v1"
|
|
COHERE_API_KEY: str
|
|
|
|
self.valves = Valves(**{"COHERE_API_KEY": os.getenv("COHERE_API_KEY")})
|
|
|
|
self.pipelines = self.get_cohere_models()
|
|
|
|
async def on_startup(self):
|
|
print(f"on_startup:{__name__}")
|
|
pass
|
|
|
|
async def on_shutdown(self):
|
|
print(f"on_shutdown:{__name__}")
|
|
pass
|
|
|
|
async def on_valves_updated(self):
|
|
# This function is called when the valves are updated.
|
|
|
|
self.pipelines = self.get_cohere_models()
|
|
|
|
pass
|
|
|
|
def get_cohere_models(self):
|
|
if self.valves.COHERE_API_KEY:
|
|
try:
|
|
headers = {}
|
|
headers["Authorization"] = f"Bearer {self.valves.COHERE_API_KEY}"
|
|
headers["Content-Type"] = "application/json"
|
|
|
|
r = requests.get(
|
|
f"{self.valves.COHERE_API_BASE_URL}/models", headers=headers
|
|
)
|
|
|
|
models = r.json()
|
|
return [
|
|
{
|
|
"id": model["name"],
|
|
"name": model["name"] if "name" in model else model["name"],
|
|
}
|
|
for model in models["models"]
|
|
]
|
|
except Exception as e:
|
|
|
|
print(f"Error: {e}")
|
|
return [
|
|
{
|
|
"id": self.id,
|
|
"name": "Could not fetch models from Cohere, please update the API Key in the valves.",
|
|
},
|
|
]
|
|
else:
|
|
return []
|
|
|
|
def pipe(
|
|
self, user_message: str, model_id: str, messages: List[dict], body: dict
|
|
) -> Union[str, Generator, Iterator]:
|
|
try:
|
|
if body.get("stream", False):
|
|
return self.stream_response(user_message, model_id, messages, body)
|
|
else:
|
|
return self.get_completion(user_message, model_id, messages, body)
|
|
except Exception as e:
|
|
return f"Error: {e}"
|
|
|
|
def stream_response(
|
|
self, user_message: str, model_id: str, messages: List[dict], body: dict
|
|
) -> Generator:
|
|
|
|
headers = {}
|
|
headers["Authorization"] = f"Bearer {self.valves.COHERE_API_KEY}"
|
|
headers["Content-Type"] = "application/json"
|
|
|
|
r = requests.post(
|
|
url=f"{self.valves.COHERE_API_BASE_URL}/chat",
|
|
json={
|
|
"model": model_id,
|
|
"chat_history": [
|
|
{
|
|
"role": "USER" if message["role"] == "user" else "CHATBOT",
|
|
"message": message["content"],
|
|
}
|
|
for message in messages[:-1]
|
|
],
|
|
"message": user_message,
|
|
"stream": True,
|
|
},
|
|
headers=headers,
|
|
stream=True,
|
|
)
|
|
|
|
r.raise_for_status()
|
|
|
|
for line in r.iter_lines():
|
|
if line:
|
|
try:
|
|
line = json.loads(line)
|
|
if line["event_type"] == "text-generation":
|
|
yield line["text"]
|
|
except:
|
|
pass
|
|
|
|
def get_completion(
|
|
self, user_message: str, model_id: str, messages: List[dict], body: dict
|
|
) -> str:
|
|
headers = {}
|
|
headers["Authorization"] = f"Bearer {self.valves.COHERE_API_KEY}"
|
|
headers["Content-Type"] = "application/json"
|
|
|
|
r = requests.post(
|
|
url=f"{self.valves.COHERE_API_BASE_URL}/chat",
|
|
json={
|
|
"model": model_id,
|
|
"chat_history": [
|
|
{
|
|
"role": "USER" if message["role"] == "user" else "CHATBOT",
|
|
"message": message["content"],
|
|
}
|
|
for message in messages[:-1]
|
|
],
|
|
"message": user_message,
|
|
},
|
|
headers=headers,
|
|
)
|
|
|
|
r.raise_for_status()
|
|
data = r.json()
|
|
|
|
return data["text"] if "text" in data else "No response from Cohere."
|