fix(llm): fix boto3 metadata endpoint

Author: ionmincu

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.5.10"
+version = "0.5.11"
 description = "Python SDK that enables developers to build and deploy LangGraph agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"

src/uipath_langchain/chat/bedrock.py

@@ -44,7 +44,8 @@ def _check_bedrock_dependencies() -> None:
 _check_bedrock_dependencies()
 
 import boto3
-import botocore.config
+from botocore import UNSIGNED
+from botocore.config import Config
 from langchain_aws import (
     ChatBedrock,
     ChatBedrockConverse,
@@ -97,10 +98,11 @@ def get_client(self):
             region_name="none",
             aws_access_key_id="none",
             aws_secret_access_key="none",
-            config=botocore.config.Config(
+            config=Config(
+                signature_version=UNSIGNED,
                 retries={
                     "total_max_attempts": 1,
-                }
+                },
             ),
         )
         client.meta.events.register(
@@ -183,6 +185,7 @@ def __init__(
         client = passthrough_client.get_client()
         kwargs["client"] = client
         kwargs["model"] = model_name
+        kwargs.setdefault("region_name", "none")
         super().__init__(**kwargs)
         self.model = model_name
         self.retryer = retryer
@@ -244,6 +247,7 @@ def __init__(
         client = passthrough_client.get_client()
         kwargs["client"] = client
         kwargs["model"] = model_name
+        kwargs.setdefault("region_name", "none")
         super().__init__(**kwargs)
         self.model = model_name
         self.retryer = retryer