import asyncio
import sys
from datetime import datetime, timedelta
from typing import TYPE_CHECKING, Any, List, Literal, Optional, Tuple, TypedDict, Union
from fastapi import HTTPException
from pydantic import BaseModel
import litellm
from litellm import DualCache, ModelResponse
from litellm._logging import verbose_proxy_logger
from litellm.integrations.custom_logger import CustomLogger
from litellm.litellm_core_utils.core_helpers import _get_parent_otel_span_from_kwargs
from litellm.proxy._types import CommonProxyErrors, CurrentItemRateLimit, UserAPIKeyAuth
from litellm.proxy.auth.auth_utils import (
get_key_model_rpm_limit,
get_key_model_tpm_limit,
)
if TYPE_CHECKING:
from opentelemetry.trace import Span as _Span
from litellm.proxy.utils import InternalUsageCache as _InternalUsageCache
Span = _Span
InternalUsageCache = _InternalUsageCache
else:
Span = Any
InternalUsageCache = Any
class CacheObject(TypedDict):
current_global_requests: Optional[dict]
request_count_api_key: Optional[dict]
request_count_api_key_model: Optional[dict]
request_count_user_id: Optional[dict]
request_count_team_id: Optional[dict]
request_count_end_user_id: Optional[dict]
class _PROXY_MaxParallelRequestsHandler(CustomLogger):
# Class variables or attributes
def __init__(self, internal_usage_cache: InternalUsageCache):
self.internal_usage_cache = internal_usage_cache
def print_verbose(self, print_statement):
try:
verbose_proxy_logger.debug(print_statement)
if litellm.set_verbose:
print(print_statement) # noqa
except Exception:
pass
async def check_key_in_limits(
self,
user_api_key_dict: UserAPIKeyAuth,
cache: DualCache,
data: dict,
call_type: str,
max_parallel_requests: int,
tpm_limit: int,
rpm_limit: int,
current: Optional[dict],
request_count_api_key: str,
rate_limit_type: Literal["key", "model_per_key", "user", "customer", "team"],
values_to_update_in_cache: List[Tuple[Any, Any]],
) -> dict:
verbose_proxy_logger.info(
f"Current Usage of {rate_limit_type} in this minute: {current}"
)
if current is None:
if max_parallel_requests == 0 or tpm_limit == 0 or rpm_limit == 0:
# base case
raise self.raise_rate_limit_error(
additional_details=f"{CommonProxyErrors.max_parallel_request_limit_reached.value}. Hit limit for {rate_limit_type}. Current limits: max_parallel_requests: {max_parallel_requests}, tpm_limit: {tpm_limit}, rpm_limit: {rpm_limit}"
)
new_val = {
"current_requests": 1,
"current_tpm": 0,
"current_rpm": 1,
}
values_to_update_in_cache.append((request_count_api_key, new_val))
elif (
int(current["current_requests"]) < max_parallel_requests
and current["current_tpm"] < tpm_limit
and current["current_rpm"] < rpm_limit
):
# Increase count for this token
new_val = {
"current_requests": current["current_requests"] + 1,
"current_tpm": current["current_tpm"],
"current_rpm": current["current_rpm"] + 1,
}
values_to_update_in_cache.append((request_count_api_key, new_val))
else:
raise HTTPException(
status_code=429,
detail=f"LiteLLM Rate Limit Handler for rate limit type = {rate_limit_type}. {CommonProxyErrors.max_parallel_request_limit_reached.value}. current rpm: {current['current_rpm']}, rpm limit: {rpm_limit}, current tpm: {current['current_tpm']}, tpm limit: {tpm_limit}, current max_parallel_requests: {current['current_requests']}, max_parallel_requests: {max_parallel_requests}",
headers={"retry-after": str(self.time_to_next_minute())},
)
await self.internal_usage_cache.async_batch_set_cache(
cache_list=values_to_update_in_cache,
ttl=60,
litellm_parent_otel_span=user_api_key_dict.parent_otel_span,
local_only=True,
)
return new_val
def time_to_next_minute(self) -> float:
# Get the current time
now = datetime.now()
# Calculate the next minute
next_minute = (now + timedelta(minutes=1)).replace(second=0, microsecond=0)
# Calculate the difference in seconds
seconds_to_next_minute = (next_minute - now).total_seconds()
return seconds_to_next_minute
def raise_rate_limit_error(
self, additional_details: Optional[str] = None
) -> HTTPException:
"""
Raise an HTTPException with a 429 status code and a retry-after header
"""
error_message = "Max parallel request limit reached"
if additional_details is not None:
error_message = error_message + " " + additional_details
raise HTTPException(
status_code=429,
detail=f"Max parallel request limit reached {additional_details}",
headers={"retry-after": str(self.time_to_next_minute())},
)
async def get_all_cache_objects(
self,
current_global_requests: Optional[str],
request_count_api_key: Optional[str],
request_count_api_key_model: Optional[str],
request_count_user_id: Optional[str],
request_count_team_id: Optional[str],
request_count_end_user_id: Optional[str],
parent_otel_span: Optional[Span] = None,
) -> CacheObject:
keys = [
current_global_requests,
request_count_api_key,
request_count_api_key_model,
request_count_user_id,
request_count_team_id,
request_count_end_user_id,
]
results = await self.internal_usage_cache.async_batch_get_cache(
keys=keys,
parent_otel_span=parent_otel_span,
)
if results is None:
return CacheObject(
current_global_requests=None,
request_count_api_key=None,
request_count_api_key_model=None,
request_count_user_id=None,
request_count_team_id=None,
request_count_end_user_id=None,
)
return CacheObject(
current_global_requests=results[0],
request_count_api_key=results[1],
request_count_api_key_model=results[2],
request_count_user_id=results[3],
request_count_team_id=results[4],
request_count_end_user_id=results[5],
)
async def async_pre_call_hook( # noqa: PLR0915
self,
user_api_key_dict: UserAPIKeyAuth,
cache: DualCache,
data: dict,
call_type: str,
):
self.print_verbose("Inside Max Parallel Request Pre-Call Hook")
api_key = user_api_key_dict.api_key
max_parallel_requests = user_api_key_dict.max_parallel_requests
if max_parallel_requests is None:
max_parallel_requests = sys.maxsize
if data is None:
data = {}
global_max_parallel_requests = data.get("metadata", {}).get(
"global_max_parallel_requests", None
)
tpm_limit = getattr(user_api_key_dict, "tpm_limit", sys.maxsize)
if tpm_limit is None:
tpm_limit = sys.maxsize
rpm_limit = getattr(user_api_key_dict, "rpm_limit", sys.maxsize)
if rpm_limit is None:
rpm_limit = sys.maxsize
values_to_update_in_cache: List[Tuple[Any, Any]] = (
[]
) # values that need to get updated in cache, will run a batch_set_cache after this function
# ------------
# Setup values
# ------------
new_val: Optional[dict] = None
if global_max_parallel_requests is not None:
# get value from cache
_key = "global_max_parallel_requests"
current_global_requests = await self.internal_usage_cache.async_get_cache(
key=_key,
local_only=True,
litellm_parent_otel_span=user_api_key_dict.parent_otel_span,
)
# check if below limit
if current_global_requests is None:
current_global_requests = 1
# if above -> raise error
if current_global_requests >= global_max_parallel_requests:
return self.raise_rate_limit_error(
additional_details=f"Hit Global Limit: Limit={global_max_parallel_requests}, current: {current_global_requests}"
)
# if below -> increment
else:
await self.internal_usage_cache.async_increment_cache(
key=_key,
value=1,
local_only=True,
litellm_parent_otel_span=user_api_key_dict.parent_otel_span,
)
_model = data.get("model", None)
current_date = datetime.now().strftime("%Y-%m-%d")
current_hour = datetime.now().strftime("%H")
current_minute = datetime.now().strftime("%M")
precise_minute = f"{current_date}-{current_hour}-{current_minute}"
cache_objects: CacheObject = await self.get_all_cache_objects(
current_global_requests=(
"global_max_parallel_requests"
if global_max_parallel_requests is not None
else None
),
request_count_api_key=(
f"{api_key}::{precise_minute}::request_count"
if api_key is not None
else None
),
request_count_api_key_model=(
f"{api_key}::{_model}::{precise_minute}::request_count"
if api_key is not None and _model is not None
else None
),
request_count_user_id=(
f"{user_api_key_dict.user_id}::{precise_minute}::request_count"
if user_api_key_dict.user_id is not None
else None
),
request_count_team_id=(
f"{user_api_key_dict.team_id}::{precise_minute}::request_count"
if user_api_key_dict.team_id is not None
else None
),
request_count_end_user_id=(
f"{user_api_key_dict.end_user_id}::{precise_minute}::request_count"
if user_api_key_dict.end_user_id is not None
else None
),
parent_otel_span=user_api_key_dict.parent_otel_span,
)
if api_key is not None:
request_count_api_key = f"{api_key}::{precise_minute}::request_count"
# CHECK IF REQUEST ALLOWED for key
await self.check_key_in_limits(
user_api_key_dict=user_api_key_dict,
cache=cache,
data=data,
call_type=call_type,
max_parallel_requests=max_parallel_requests,
current=cache_objects["request_count_api_key"],
request_count_api_key=request_count_api_key,
tpm_limit=tpm_limit,
rpm_limit=rpm_limit,
rate_limit_type="key",
values_to_update_in_cache=values_to_update_in_cache,
)
# Check if request under RPM/TPM per model for a given API Key
if (
get_key_model_tpm_limit(user_api_key_dict) is not None
or get_key_model_rpm_limit(user_api_key_dict) is not None
):
_model = data.get("model", None)
request_count_api_key = (
f"{api_key}::{_model}::{precise_minute}::request_count"
)
_tpm_limit_for_key_model = get_key_model_tpm_limit(user_api_key_dict)
_rpm_limit_for_key_model = get_key_model_rpm_limit(user_api_key_dict)
tpm_limit_for_model = None
rpm_limit_for_model = None
if _model is not None:
if _tpm_limit_for_key_model:
tpm_limit_for_model = _tpm_limit_for_key_model.get(_model)
if _rpm_limit_for_key_model:
rpm_limit_for_model = _rpm_limit_for_key_model.get(_model)
new_val = await self.check_key_in_limits(
user_api_key_dict=user_api_key_dict,
cache=cache,
data=data,
call_type=call_type,
max_parallel_requests=sys.maxsize, # TODO: Support max parallel requests for a model
current=cache_objects["request_count_api_key_model"],
request_count_api_key=request_count_api_key,
tpm_limit=tpm_limit_for_model or sys.maxsize,
rpm_limit=rpm_limit_for_model or sys.maxsize,
rate_limit_type="model_per_key",
values_to_update_in_cache=values_to_update_in_cache,
)
_remaining_tokens = None
_remaining_requests = None
# Add remaining tokens, requests to metadata
if new_val:
if tpm_limit_for_model is not None:
_remaining_tokens = tpm_limit_for_model - new_val["current_tpm"]
if rpm_limit_for_model is not None:
_remaining_requests = rpm_limit_for_model - new_val["current_rpm"]
_remaining_limits_data = {
f"litellm-key-remaining-tokens-{_model}": _remaining_tokens,
f"litellm-key-remaining-requests-{_model}": _remaining_requests,
}
if "metadata" not in data:
data["metadata"] = {}
data["metadata"].update(_remaining_limits_data)
# check if REQUEST ALLOWED for user_id
user_id = user_api_key_dict.user_id
if user_id is not None:
user_tpm_limit = user_api_key_dict.user_tpm_limit
user_rpm_limit = user_api_key_dict.user_rpm_limit
if user_tpm_limit is None:
user_tpm_limit = sys.maxsize
if user_rpm_limit is None:
user_rpm_limit = sys.maxsize
request_count_api_key = f"{user_id}::{precise_minute}::request_count"
# print(f"Checking if {request_count_api_key} is allowed to make request for minute {precise_minute}")
await self.check_key_in_limits(
user_api_key_dict=user_api_key_dict,
cache=cache,
data=data,
call_type=call_type,
max_parallel_requests=sys.maxsize, # TODO: Support max parallel requests for a user
current=cache_objects["request_count_user_id"],
request_count_api_key=request_count_api_key,
tpm_limit=user_tpm_limit,
rpm_limit=user_rpm_limit,
rate_limit_type="user",
values_to_update_in_cache=values_to_update_in_cache,
)
# TEAM RATE LIMITS
## get team tpm/rpm limits
team_id = user_api_key_dict.team_id
if team_id is not None:
team_tpm_limit = user_api_key_dict.team_tpm_limit
team_rpm_limit = user_api_key_dict.team_rpm_limit
if team_tpm_limit is None:
team_tpm_limit = sys.maxsize
if team_rpm_limit is None:
team_rpm_limit = sys.maxsize
request_count_api_key = f"{team_id}::{precise_minute}::request_count"
# print(f"Checking if {request_count_api_key} is allowed to make request for minute {precise_minute}")
await self.check_key_in_limits(
user_api_key_dict=user_api_key_dict,
cache=cache,
data=data,
call_type=call_type,
max_parallel_requests=sys.maxsize, # TODO: Support max parallel requests for a team
current=cache_objects["request_count_team_id"],
request_count_api_key=request_count_api_key,
tpm_limit=team_tpm_limit,
rpm_limit=team_rpm_limit,
rate_limit_type="team",
values_to_update_in_cache=values_to_update_in_cache,
)
# End-User Rate Limits
# Only enforce if user passed `user` to /chat, /completions, /embeddings
if user_api_key_dict.end_user_id:
end_user_tpm_limit = getattr(
user_api_key_dict, "end_user_tpm_limit", sys.maxsize
)
end_user_rpm_limit = getattr(
user_api_key_dict, "end_user_rpm_limit", sys.maxsize
)
if end_user_tpm_limit is None:
end_user_tpm_limit = sys.maxsize
if end_user_rpm_limit is None:
end_user_rpm_limit = sys.maxsize
# now do the same tpm/rpm checks
request_count_api_key = (
f"{user_api_key_dict.end_user_id}::{precise_minute}::request_count"
)
# print(f"Checking if {request_count_api_key} is allowed to make request for minute {precise_minute}")
await self.check_key_in_limits(
user_api_key_dict=user_api_key_dict,
cache=cache,
data=data,
call_type=call_type,
max_parallel_requests=sys.maxsize, # TODO: Support max parallel requests for an End-User
request_count_api_key=request_count_api_key,
current=cache_objects["request_count_end_user_id"],
tpm_limit=end_user_tpm_limit,
rpm_limit=end_user_rpm_limit,
rate_limit_type="customer",
values_to_update_in_cache=values_to_update_in_cache,
)
asyncio.create_task(
self.internal_usage_cache.async_batch_set_cache(
cache_list=values_to_update_in_cache,
ttl=60,
litellm_parent_otel_span=user_api_key_dict.parent_otel_span,
) # don't block execution for cache updates
)
return
async def async_log_success_event( # noqa: PLR0915
self, kwargs, response_obj, start_time, end_time
):
from litellm.proxy.common_utils.callback_utils import (
get_model_group_from_litellm_kwargs,
)
litellm_parent_otel_span: Union[Span, None] = _get_parent_otel_span_from_kwargs(
kwargs=kwargs
)
try:
self.print_verbose("INSIDE parallel request limiter ASYNC SUCCESS LOGGING")
global_max_parallel_requests = kwargs["litellm_params"]["metadata"].get(
"global_max_parallel_requests", None
)
user_api_key = kwargs["litellm_params"]["metadata"]["user_api_key"]
user_api_key_user_id = kwargs["litellm_params"]["metadata"].get(
"user_api_key_user_id", None
)
user_api_key_team_id = kwargs["litellm_params"]["metadata"].get(
"user_api_key_team_id", None
)
user_api_key_model_max_budget = kwargs["litellm_params"]["metadata"].get(
"user_api_key_model_max_budget", None
)
user_api_key_end_user_id = kwargs.get("user")
user_api_key_metadata = (
kwargs["litellm_params"]["metadata"].get("user_api_key_metadata", {})
or {}
)
# ------------
# Setup values
# ------------
if global_max_parallel_requests is not None:
# get value from cache
_key = "global_max_parallel_requests"
# decrement
await self.internal_usage_cache.async_increment_cache(
key=_key,
value=-1,
local_only=True,
litellm_parent_otel_span=litellm_parent_otel_span,
)
current_date = datetime.now().strftime("%Y-%m-%d")
current_hour = datetime.now().strftime("%H")
current_minute = datetime.now().strftime("%M")
precise_minute = f"{current_date}-{current_hour}-{current_minute}"
total_tokens = 0
if isinstance(response_obj, ModelResponse):
total_tokens = response_obj.usage.total_tokens # type: ignore
# ------------
# Update usage - API Key
# ------------
values_to_update_in_cache = []
if user_api_key is not None:
request_count_api_key = (
f"{user_api_key}::{precise_minute}::request_count"
)
current = await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=litellm_parent_otel_span,
) or {
"current_requests": 1,
"current_tpm": 0,
"current_rpm": 0,
}
new_val = {
"current_requests": max(current["current_requests"] - 1, 0),
"current_tpm": current["current_tpm"] + total_tokens,
"current_rpm": current["current_rpm"],
}
self.print_verbose(
f"updated_value in success call: {new_val}, precise_minute: {precise_minute}"
)
values_to_update_in_cache.append((request_count_api_key, new_val))
# ------------
# Update usage - model group + API Key
# ------------
model_group = get_model_group_from_litellm_kwargs(kwargs)
if (
user_api_key is not None
and model_group is not None
and (
"model_rpm_limit" in user_api_key_metadata
or "model_tpm_limit" in user_api_key_metadata
or user_api_key_model_max_budget is not None
)
):
request_count_api_key = (
f"{user_api_key}::{model_group}::{precise_minute}::request_count"
)
current = await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=litellm_parent_otel_span,
) or {
"current_requests": 1,
"current_tpm": 0,
"current_rpm": 0,
}
new_val = {
"current_requests": max(current["current_requests"] - 1, 0),
"current_tpm": current["current_tpm"] + total_tokens,
"current_rpm": current["current_rpm"],
}
self.print_verbose(
f"updated_value in success call: {new_val}, precise_minute: {precise_minute}"
)
values_to_update_in_cache.append((request_count_api_key, new_val))
# ------------
# Update usage - User
# ------------
if user_api_key_user_id is not None:
total_tokens = 0
if isinstance(response_obj, ModelResponse):
total_tokens = response_obj.usage.total_tokens # type: ignore
request_count_api_key = (
f"{user_api_key_user_id}::{precise_minute}::request_count"
)
current = await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=litellm_parent_otel_span,
) or {
"current_requests": 1,
"current_tpm": total_tokens,
"current_rpm": 1,
}
new_val = {
"current_requests": max(current["current_requests"] - 1, 0),
"current_tpm": current["current_tpm"] + total_tokens,
"current_rpm": current["current_rpm"],
}
self.print_verbose(
f"updated_value in success call: {new_val}, precise_minute: {precise_minute}"
)
values_to_update_in_cache.append((request_count_api_key, new_val))
# ------------
# Update usage - Team
# ------------
if user_api_key_team_id is not None:
total_tokens = 0
if isinstance(response_obj, ModelResponse):
total_tokens = response_obj.usage.total_tokens # type: ignore
request_count_api_key = (
f"{user_api_key_team_id}::{precise_minute}::request_count"
)
current = await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=litellm_parent_otel_span,
) or {
"current_requests": 1,
"current_tpm": total_tokens,
"current_rpm": 1,
}
new_val = {
"current_requests": max(current["current_requests"] - 1, 0),
"current_tpm": current["current_tpm"] + total_tokens,
"current_rpm": current["current_rpm"],
}
self.print_verbose(
f"updated_value in success call: {new_val}, precise_minute: {precise_minute}"
)
values_to_update_in_cache.append((request_count_api_key, new_val))
# ------------
# Update usage - End User
# ------------
if user_api_key_end_user_id is not None:
total_tokens = 0
if isinstance(response_obj, ModelResponse):
total_tokens = response_obj.usage.total_tokens # type: ignore
request_count_api_key = (
f"{user_api_key_end_user_id}::{precise_minute}::request_count"
)
current = await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=litellm_parent_otel_span,
) or {
"current_requests": 1,
"current_tpm": total_tokens,
"current_rpm": 1,
}
new_val = {
"current_requests": max(current["current_requests"] - 1, 0),
"current_tpm": current["current_tpm"] + total_tokens,
"current_rpm": current["current_rpm"],
}
self.print_verbose(
f"updated_value in success call: {new_val}, precise_minute: {precise_minute}"
)
values_to_update_in_cache.append((request_count_api_key, new_val))
await self.internal_usage_cache.async_batch_set_cache(
cache_list=values_to_update_in_cache,
ttl=60,
litellm_parent_otel_span=litellm_parent_otel_span,
)
except Exception as e:
self.print_verbose(e) # noqa
async def async_log_failure_event(self, kwargs, response_obj, start_time, end_time):
try:
self.print_verbose("Inside Max Parallel Request Failure Hook")
litellm_parent_otel_span: Union[Span, None] = (
_get_parent_otel_span_from_kwargs(kwargs=kwargs)
)
_metadata = kwargs["litellm_params"].get("metadata", {}) or {}
global_max_parallel_requests = _metadata.get(
"global_max_parallel_requests", None
)
user_api_key = _metadata.get("user_api_key", None)
self.print_verbose(f"user_api_key: {user_api_key}")
if user_api_key is None:
return
## decrement call count if call failed
if CommonProxyErrors.max_parallel_request_limit_reached.value in str(
kwargs["exception"]
):
pass # ignore failed calls due to max limit being reached
else:
# ------------
# Setup values
# ------------
if global_max_parallel_requests is not None:
# get value from cache
_key = "global_max_parallel_requests"
(
await self.internal_usage_cache.async_get_cache(
key=_key,
local_only=True,
litellm_parent_otel_span=litellm_parent_otel_span,
)
)
# decrement
await self.internal_usage_cache.async_increment_cache(
key=_key,
value=-1,
local_only=True,
litellm_parent_otel_span=litellm_parent_otel_span,
)
current_date = datetime.now().strftime("%Y-%m-%d")
current_hour = datetime.now().strftime("%H")
current_minute = datetime.now().strftime("%M")
precise_minute = f"{current_date}-{current_hour}-{current_minute}"
request_count_api_key = (
f"{user_api_key}::{precise_minute}::request_count"
)
# ------------
# Update usage
# ------------
current = await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=litellm_parent_otel_span,
) or {
"current_requests": 1,
"current_tpm": 0,
"current_rpm": 0,
}
new_val = {
"current_requests": max(current["current_requests"] - 1, 0),
"current_tpm": current["current_tpm"],
"current_rpm": current["current_rpm"],
}
self.print_verbose(f"updated_value in failure call: {new_val}")
await self.internal_usage_cache.async_set_cache(
request_count_api_key,
new_val,
ttl=60,
litellm_parent_otel_span=litellm_parent_otel_span,
) # save in cache for up to 1 min.
except Exception as e:
verbose_proxy_logger.exception(
"Inside Parallel Request Limiter: An exception occurred - {}".format(
str(e)
)
)
async def get_internal_user_object(
self,
user_id: str,
user_api_key_dict: UserAPIKeyAuth,
) -> Optional[dict]:
"""
Helper to get the 'Internal User Object'
It uses the `get_user_object` function from `litellm.proxy.auth.auth_checks`
We need this because the UserApiKeyAuth object does not contain the rpm/tpm limits for a User AND there could be a perf impact by additionally reading the UserTable.
"""
from litellm._logging import verbose_proxy_logger
from litellm.proxy.auth.auth_checks import get_user_object
from litellm.proxy.proxy_server import prisma_client
try:
_user_id_rate_limits = await get_user_object(
user_id=user_id,
prisma_client=prisma_client,
user_api_key_cache=self.internal_usage_cache.dual_cache,
user_id_upsert=False,
parent_otel_span=user_api_key_dict.parent_otel_span,
proxy_logging_obj=None,
)
if _user_id_rate_limits is None:
return None
return _user_id_rate_limits.model_dump()
except Exception as e:
verbose_proxy_logger.debug(
"Parallel Request Limiter: Error getting user object", str(e)
)
return None
async def async_post_call_success_hook(
self, data: dict, user_api_key_dict: UserAPIKeyAuth, response
):
"""
Retrieve the key's remaining rate limits.
"""
api_key = user_api_key_dict.api_key
current_date = datetime.now().strftime("%Y-%m-%d")
current_hour = datetime.now().strftime("%H")
current_minute = datetime.now().strftime("%M")
precise_minute = f"{current_date}-{current_hour}-{current_minute}"
request_count_api_key = f"{api_key}::{precise_minute}::request_count"
current: Optional[CurrentItemRateLimit] = (
await self.internal_usage_cache.async_get_cache(
key=request_count_api_key,
litellm_parent_otel_span=user_api_key_dict.parent_otel_span,
)
)
key_remaining_rpm_limit: Optional[int] = None
key_rpm_limit: Optional[int] = None
key_remaining_tpm_limit: Optional[int] = None
key_tpm_limit: Optional[int] = None
if current is not None:
if user_api_key_dict.rpm_limit is not None:
key_remaining_rpm_limit = (
user_api_key_dict.rpm_limit - current["current_rpm"]
)
key_rpm_limit = user_api_key_dict.rpm_limit
if user_api_key_dict.tpm_limit is not None:
key_remaining_tpm_limit = (
user_api_key_dict.tpm_limit - current["current_tpm"]
)
key_tpm_limit = user_api_key_dict.tpm_limit
if hasattr(response, "_hidden_params"):
_hidden_params = getattr(response, "_hidden_params")
else:
_hidden_params = None
if _hidden_params is not None and (
isinstance(_hidden_params, BaseModel) or isinstance(_hidden_params, dict)
):
if isinstance(_hidden_params, BaseModel):
_hidden_params = _hidden_params.model_dump()
_additional_headers = _hidden_params.get("additional_headers", {}) or {}
if key_remaining_rpm_limit is not None:
_additional_headers["x-ratelimit-remaining-requests"] = (
key_remaining_rpm_limit
)
if key_rpm_limit is not None:
_additional_headers["x-ratelimit-limit-requests"] = key_rpm_limit
if key_remaining_tpm_limit is not None:
_additional_headers["x-ratelimit-remaining-tokens"] = (
key_remaining_tpm_limit
)
if key_tpm_limit is not None:
_additional_headers["x-ratelimit-limit-tokens"] = key_tpm_limit
setattr(
response,
"_hidden_params",
{**_hidden_params, "additional_headers": _additional_headers},
)
return await super().async_post_call_success_hook(
data, user_api_key_dict, response
)
