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Original file line number | Diff line number | Diff line change |
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from base64 import b64encode | ||
from collections.abc import AsyncIterable | ||
from logging import getLogger | ||
|
||
from langchain.prompts import ChatPromptTemplate, HumanMessagePromptTemplate | ||
from langchain_core.messages import HumanMessage, SystemMessage | ||
from langchain_openai import AzureChatOpenAI | ||
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||
from backend.settings.azure_openai import Settings | ||
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logger = getLogger(__name__) | ||
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class Client: | ||
def __init__(self, settings: Settings) -> None: | ||
self.settings = settings | ||
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def get_client(self) -> AzureChatOpenAI: | ||
return AzureChatOpenAI( | ||
api_key=self.settings.azure_openai_api_key, | ||
api_version=self.settings.azure_openai_api_version, | ||
azure_endpoint=self.settings.azure_openai_endpoint, | ||
azure_deployment=self.settings.azure_openai_gpt_model, | ||
) | ||
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def create_chat_completions( | ||
self, | ||
content: str, | ||
) -> str: | ||
response = self.get_client().invoke( | ||
[ | ||
HumanMessage( | ||
content=content, | ||
), | ||
] | ||
) | ||
logger.info(response) | ||
return response.content | ||
|
||
async def create_chat_completions_stream( | ||
self, | ||
content: str, | ||
) -> AsyncIterable[str]: | ||
llm = self.get_client() | ||
messages = [HumanMessagePromptTemplate.from_template(template="{message}")] | ||
prompt = ChatPromptTemplate.from_messages(messages) | ||
chain = prompt | llm | ||
res = chain.astream({"message": content}) | ||
async for msg in res: | ||
logger.info(msg) | ||
yield msg.content | ||
|
||
def create_chat_completions_with_vision( | ||
self, | ||
system_prompt: str, | ||
user_prompt: str, | ||
image: bytes, | ||
) -> str: | ||
encoded_image = b64encode(image).decode("ascii") | ||
|
||
response = self.get_client().invoke( | ||
[ | ||
SystemMessage( | ||
content=system_prompt, | ||
), | ||
HumanMessage( | ||
content=[ | ||
{ | ||
"type": "text", | ||
"text": user_prompt, | ||
}, | ||
{ | ||
"type": "image_url", | ||
"image_url": {"url": f"data:image/jpeg;base64,{encoded_image}"}, | ||
}, | ||
], | ||
), | ||
] | ||
) | ||
logger.info(response) | ||
return response.content |
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