litellm/proxy/rerank_endpoints/endpoints.py

#### Rerank Endpoints #####

import orjson
from fastapi import APIRouter, Depends, HTTPException, Request, Response, status
from fastapi.responses import ORJSONResponse

from litellm._logging import verbose_proxy_logger
from litellm.proxy._types import *
from litellm.proxy.auth.user_api_key_auth import user_api_key_auth

router = APIRouter()
import asyncio


@router.post(
    "/v1/rerank",
    dependencies=[Depends(user_api_key_auth)],
    response_class=ORJSONResponse,
    tags=["rerank"],
)
@router.post(
    "/rerank",
    dependencies=[Depends(user_api_key_auth)],
    response_class=ORJSONResponse,
    tags=["rerank"],
)
async def rerank(
    request: Request,
    fastapi_response: Response,
    user_api_key_dict: UserAPIKeyAuth = Depends(user_api_key_auth),
):
    from litellm.proxy.proxy_server import (
        add_litellm_data_to_request,
        general_settings,
        get_custom_headers,
        llm_router,
        proxy_config,
        proxy_logging_obj,
        route_request,
        user_model,
        version,
    )

    data = {}
    try:
        body = await request.body()
        data = orjson.loads(body)

        # Include original request and headers in the data
        data = await add_litellm_data_to_request(
            data=data,
            request=request,
            general_settings=general_settings,
            user_api_key_dict=user_api_key_dict,
            version=version,
            proxy_config=proxy_config,
        )

        ### CALL HOOKS ### - modify incoming data / reject request before calling the model
        data = await proxy_logging_obj.pre_call_hook(
            user_api_key_dict=user_api_key_dict, data=data, call_type="rerank"
        )

        ## ROUTE TO CORRECT ENDPOINT ##
        llm_call = await route_request(
            data=data,
            route_type="arerank",
            llm_router=llm_router,
            user_model=user_model,
        )
        response = await llm_call

        ### ALERTING ###
        asyncio.create_task(
            proxy_logging_obj.update_request_status(
                litellm_call_id=data.get("litellm_call_id", ""), status="success"
            )
        )

        ### RESPONSE HEADERS ###
        hidden_params = getattr(response, "_hidden_params", {}) or {}
        model_id = hidden_params.get("model_id", None) or ""
        cache_key = hidden_params.get("cache_key", None) or ""
        api_base = hidden_params.get("api_base", None) or ""
        additional_headers = hidden_params.get("additional_headers", None) or {}
        fastapi_response.headers.update(
            get_custom_headers(
                user_api_key_dict=user_api_key_dict,
                model_id=model_id,
                cache_key=cache_key,
                api_base=api_base,
                version=version,
                model_region=getattr(user_api_key_dict, "allowed_model_region", ""),
                request_data=data,
                **additional_headers,
            )
        )

        return response
    except Exception as e:
        await proxy_logging_obj.post_call_failure_hook(
            user_api_key_dict=user_api_key_dict, original_exception=e, request_data=data
        )
        verbose_proxy_logger.error(
            "litellm.proxy.proxy_server.rerank(): Exception occured - {}".format(str(e))
        )
        if isinstance(e, HTTPException):
            raise ProxyException(
                message=getattr(e, "message", str(e)),
                type=getattr(e, "type", "None"),
                param=getattr(e, "param", "None"),
                code=getattr(e, "status_code", status.HTTP_400_BAD_REQUEST),
            )
        else:
            error_msg = f"{str(e)}"
            raise ProxyException(
                message=getattr(e, "message", error_msg),
                type=getattr(e, "type", "None"),
                param=getattr(e, "param", "None"),
                code=getattr(e, "status_code", 500),
            )