(Feat) - Allow viewing Request/Response Logs stored in GCS Bucket (#8449)

* BaseRequestResponseFetchFromCustomLogger

* get_active_base_request_response_fetch_from_custom_logger

* get_request_response_payload

* ui_view_request_response_for_request_id

* fix uiSpendLogDetailsCall

* fix get_request_response_payload

* ui fix RequestViewer

* use 1 class AdditionalLoggingUtils

* ui_view_request_response_for_request_id

* cache the prefetch logs details

* refactor prefetch

* test view request/resp logs

* fix code quality

* fix get_request_response_payload

* uninstall posthog
prevent it from being added in ci/cd

* fix posthog

* fix traceloop test

* fix linting error

litellm/proxy/spend_tracking/spend_management_endpoints.py

@@ -2,6 +2,7 @@
 import collections
 import os
 from datetime import datetime, timedelta, timezone
+from functools import lru_cache
 from typing import TYPE_CHECKING, Any, List, Optional
 
 import fastapi
@@ -1759,6 +1760,56 @@ async def ui_view_spend_logs(  # noqa: PLR0915
         raise handle_exception_on_proxy(e)
 
 
+@lru_cache(maxsize=128)
+@router.get(
+    "/spend/logs/ui/{request_id}",
+    tags=["Budget & Spend Tracking"],
+    dependencies=[Depends(user_api_key_auth)],
+    include_in_schema=False,
+)
+async def ui_view_request_response_for_request_id(
+    request_id: str,
+    start_date: Optional[str] = fastapi.Query(
+        default=None,
+        description="Time from which to start viewing key spend",
+    ),
+    end_date: Optional[str] = fastapi.Query(
+        default=None,
+        description="Time till which to view key spend",
+    ),
+):
+    """
+    View request / response for a specific request_id
+
+    - goes through all callbacks, checks if any of them have a @property -> has_request_response_payload
+    - if so, it will return the request and response payload
+    """
+    custom_loggers = (
+        litellm.logging_callback_manager.get_active_additional_logging_utils_from_custom_logger()
+    )
+    start_date_obj: Optional[datetime] = None
+    end_date_obj: Optional[datetime] = None
+    if start_date is not None:
+        start_date_obj = datetime.strptime(start_date, "%Y-%m-%d %H:%M:%S").replace(
+            tzinfo=timezone.utc
+        )
+    if end_date is not None:
+        end_date_obj = datetime.strptime(end_date, "%Y-%m-%d %H:%M:%S").replace(
+            tzinfo=timezone.utc
+        )
+
+    for custom_logger in custom_loggers:
+        payload = await custom_logger.get_request_response_payload(
+            request_id=request_id,
+            start_time_utc=start_date_obj,
+            end_time_utc=end_date_obj,
+        )
+        if payload is not None:
+            return payload
+
+    return None
+
+
 @router.get(
     "/spend/logs",
     tags=["Budget & Spend Tracking"],