refactor(azure/common_utils.py): refactor azure client param logic

create common util for azure client param logic

litellm/llms/azure/common_utils.py

@@ -1,3 +1,5 @@
+import json
+import os
 from typing import Callable, Optional, Union
 
 import httpx
@@ -5,9 +7,16 @@ from openai import AsyncAzureOpenAI, AzureOpenAI
 
 import litellm
 from litellm._logging import verbose_logger
+from litellm.caching.caching import DualCache
 from litellm.llms.base_llm.chat.transformation import BaseLLMException
+from litellm.secret_managers.get_azure_ad_token_provider import (
+    get_azure_ad_token_provider,
+)
+from litellm.secret_managers.get_secret import get_secret
 from litellm.secret_managers.main import get_secret_str
 
+azure_ad_cache = DualCache()
+
 
 class AzureOpenAIError(BaseLLMException):
     def __init__(
@@ -178,3 +187,147 @@ def get_azure_ad_token_from_username_password(
     verbose_logger.debug("token_provider %s", token_provider)
 
     return token_provider
+
+
+def get_azure_ad_token_from_oidc(azure_ad_token: str):
+    azure_client_id = os.getenv("AZURE_CLIENT_ID", None)
+    azure_tenant_id = os.getenv("AZURE_TENANT_ID", None)
+    azure_authority_host = os.getenv(
+        "AZURE_AUTHORITY_HOST", "https://login.microsoftonline.com"
+    )
+
+    if azure_client_id is None or azure_tenant_id is None:
+        raise AzureOpenAIError(
+            status_code=422,
+            message="AZURE_CLIENT_ID and AZURE_TENANT_ID must be set",
+        )
+
+    oidc_token = get_secret(azure_ad_token)
+
+    if oidc_token is None:
+        raise AzureOpenAIError(
+            status_code=401,
+            message="OIDC token could not be retrieved from secret manager.",
+        )
+
+    azure_ad_token_cache_key = json.dumps(
+        {
+            "azure_client_id": azure_client_id,
+            "azure_tenant_id": azure_tenant_id,
+            "azure_authority_host": azure_authority_host,
+            "oidc_token": oidc_token,
+        }
+    )
+
+    azure_ad_token_access_token = azure_ad_cache.get_cache(azure_ad_token_cache_key)
+    if azure_ad_token_access_token is not None:
+        return azure_ad_token_access_token
+
+    client = litellm.module_level_client
+    req_token = client.post(
+        f"{azure_authority_host}/{azure_tenant_id}/oauth2/v2.0/token",
+        data={
+            "client_id": azure_client_id,
+            "grant_type": "client_credentials",
+            "scope": "https://cognitiveservices.azure.com/.default",
+            "client_assertion_type": "urn:ietf:params:oauth:client-assertion-type:jwt-bearer",
+            "client_assertion": oidc_token,
+        },
+    )
+
+    if req_token.status_code != 200:
+        raise AzureOpenAIError(
+            status_code=req_token.status_code,
+            message=req_token.text,
+        )
+
+    azure_ad_token_json = req_token.json()
+    azure_ad_token_access_token = azure_ad_token_json.get("access_token", None)
+    azure_ad_token_expires_in = azure_ad_token_json.get("expires_in", None)
+
+    if azure_ad_token_access_token is None:
+        raise AzureOpenAIError(
+            status_code=422, message="Azure AD Token access_token not returned"
+        )
+
+    if azure_ad_token_expires_in is None:
+        raise AzureOpenAIError(
+            status_code=422, message="Azure AD Token expires_in not returned"
+        )
+
+    azure_ad_cache.set_cache(
+        key=azure_ad_token_cache_key,
+        value=azure_ad_token_access_token,
+        ttl=azure_ad_token_expires_in,
+    )
+
+    return azure_ad_token_access_token
+
+
+def initialize_azure_sdk_client(
+    litellm_params: dict,
+    api_key: Optional[str],
+    api_base: Optional[str],
+    model_name: str,
+    api_version: Optional[str],
+) -> dict:
+    azure_ad_token_provider: Optional[Callable[[], str]] = None
+    # If we have api_key, then we have higher priority
+    azure_ad_token = litellm_params.get("azure_ad_token")
+    tenant_id = litellm_params.get("tenant_id")
+    client_id = litellm_params.get("client_id")
+    client_secret = litellm_params.get("client_secret")
+    azure_username = litellm_params.get("azure_username")
+    azure_password = litellm_params.get("azure_password")
+    if not api_key and tenant_id and client_id and client_secret:
+        verbose_logger.debug("Using Azure AD Token Provider for Azure Auth")
+        azure_ad_token_provider = get_azure_ad_token_from_entrata_id(
+            tenant_id=tenant_id,
+            client_id=client_id,
+            client_secret=client_secret,
+        )
+    if azure_username and azure_password and client_id:
+        azure_ad_token_provider = get_azure_ad_token_from_username_password(
+            azure_username=azure_username,
+            azure_password=azure_password,
+            client_id=client_id,
+        )
+
+    if azure_ad_token is not None and azure_ad_token.startswith("oidc/"):
+        azure_ad_token = get_azure_ad_token_from_oidc(azure_ad_token)
+    elif (
+        not api_key
+        and azure_ad_token_provider is None
+        and litellm.enable_azure_ad_token_refresh is True
+    ):
+        try:
+            azure_ad_token_provider = get_azure_ad_token_provider()
+        except ValueError:
+            verbose_logger.debug("Azure AD Token Provider could not be used.")
+    if api_version is None:
+        api_version = os.getenv("AZURE_API_VERSION", litellm.AZURE_DEFAULT_API_VERSION)
+
+    _api_key = api_key
+    if _api_key is not None and isinstance(_api_key, str):
+        # only show first 5 chars of api_key
+        _api_key = _api_key[:8] + "*" * 15
+    verbose_logger.debug(
+        f"Initializing Azure OpenAI Client for {model_name}, Api Base: {str(api_base)}, Api Key:{_api_key}"
+    )
+    azure_client_params = {
+        "api_key": api_key,
+        "azure_endpoint": api_base,
+        "api_version": api_version,
+        "azure_ad_token": azure_ad_token,
+        "azure_ad_token_provider": azure_ad_token_provider,
+    }
+
+    if azure_ad_token_provider is not None:
+        azure_client_params["azure_ad_token_provider"] = azure_ad_token_provider
+    from litellm.llms.azure.azure import select_azure_base_url_or_endpoint
+
+    # this decides if we should set azure_endpoint or base_url on Azure OpenAI Client
+    # required to support GPT-4 vision enhancements, since base_url needs to be set on Azure OpenAI Client
+    azure_client_params = select_azure_base_url_or_endpoint(azure_client_params)
+
+    return azure_client_params