rawwar commented on code in PR #44238:
URL: https://github.com/apache/airflow/pull/44238#discussion_r1851968926


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airflow/api_fastapi/core_api/routes/public/log.py:
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@@ -0,0 +1,126 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+from __future__ import annotations
+
+from typing import Annotated, Any
+
+from fastapi import Depends, HTTPException, Request, Response, status
+from itsdangerous import BadSignature, URLSafeSerializer
+from sqlalchemy.orm import Session, joinedload
+from sqlalchemy.sql import select
+
+from airflow.api_fastapi.common.db.common import get_session
+from airflow.api_fastapi.common.headers import HeaderAcceptJsonOrText
+from airflow.api_fastapi.common.router import AirflowRouter
+from airflow.api_fastapi.common.types import Mimetype
+from airflow.api_fastapi.core_api.datamodels.log import 
TaskInstancesLogResponse
+from airflow.api_fastapi.core_api.openapi.exceptions import 
create_openapi_http_exception_doc
+from airflow.exceptions import TaskNotFound
+from airflow.models import TaskInstance, Trigger
+from airflow.models.taskinstancehistory import TaskInstanceHistory
+from airflow.utils.log.log_reader import TaskLogReader
+
+task_instances_log_router = AirflowRouter(
+    tags=["Task Instance"], 
prefix="/dags/{dag_id}/dagRuns/{dag_run_id}/taskInstances"
+)
+
+
+@task_instances_log_router.get(
+    "/{task_id}/logs/{task_try_number}",
+    responses=create_openapi_http_exception_doc([status.HTTP_404_NOT_FOUND]),
+    response_model=TaskInstancesLogResponse,
+)
+def get_log(
+    dag_id: str,
+    dag_run_id: str,
+    task_id: str,
+    task_try_number: int,
+    accept: HeaderAcceptJsonOrText,
+    request: Request,
+    session: Annotated[Session, Depends(get_session)],
+    full_content: bool = False,
+    map_index: int = -1,
+    token: str | None = None,
+):
+    """Get logs for a specific task instance."""
+    if not token:
+        metadata = {}
+    else:
+        try:
+            metadata = 
URLSafeSerializer(request.app.state.secret_key).loads(token)
+        except BadSignature:
+            raise HTTPException(
+                status.HTTP_400_BAD_REQUEST, "Bad Signature. Please use only 
the tokens provided by the API."

Review Comment:
   since this is an issue with a field(token), can this be 422 status? 
@pierrejeambrun 



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