github-advanced-security[bot] commented on code in PR #69998:
URL: https://github.com/apache/airflow/pull/69998#discussion_r3726071448
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providers/databricks/src/airflow/providers/databricks/plugins/databricks_workflow.py:
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@@ -515,6 +547,260 @@
return url_for("RepairDatabricksTasks.repair", **query_params)
+# Airflow-3 repair backend. Flask-AppBuilder was dropped in Airflow 3, so the
repair
+# action is re-implemented as a FastAPI sub-application mounted on the API
server, and the
+# repair links (below) build URLs that point at it.
+REPAIR_URL_PREFIX = "/databricks/workflow/repair"
+
+
+def _build_repair_url(
+ dag_id: str,
+ run_id: str,
+ launch_task_id: str,
+ *,
+ repair_all: bool = False,
+ task_id: str | None = None,
+) -> str:
+ """
+ Build the URL to the Airflow-3 FastAPI repair confirmation page for a
workflow run.
+
+ The URL carries only Airflow identifiers: the run's launch ``task_id``
(from which the
+ endpoint reads the trusted ``WorkflowRunMetadata`` XCom) and, for a
single-task repair, the
+ target ``task_id``. The Databricks connection, run id, and task keys are
never placed in the
+ link — the endpoint derives them server-side, so the request cannot point
the repair at an
+ arbitrary connection or Databricks run.
+ """
+ from urllib.parse import urlencode
+
+ query: dict[str, Any] = {"launch_task_id": launch_task_id}
+ if repair_all:
+ query["repair_all"] = "true"
+ if task_id:
+ query["task_id"] = task_id
+
+ base_url = conf.get("api", "base_url", fallback="").rstrip("/")
+ return (
+ f"{base_url}{REPAIR_URL_PREFIX}/{quote(dag_id,
safe='')}/{quote(run_id, safe='')}?{urlencode(query)}"
+ )
+
+
+def _get_launch_task_id_v3(operator: BaseOperator, ti_key: TaskInstanceKey) ->
str | None:
+ """
+ Resolve the ``task_id`` of the workflow's launch task for an extra-link
render.
+
+ The link only needs to name the launch task; the repair endpoint reads
that task's trusted
+ ``WorkflowRunMetadata`` XCom server-side. Returns ``None`` when the
operator is not part of a
+ Databricks workflow task group (so the link is not rendered).
+ """
+ task_group = operator.task_group
+ if not task_group:
+ return None
+ if ".launch" in ti_key.task_id:
+ return ti_key.task_id
+ return get_launch_task_id(task_group)
+
+
+if AIRFLOW_V_3_1_PLUS:
+ from fastapi import Depends, FastAPI, HTTPException, Request
+ from fastapi.responses import HTMLResponse, RedirectResponse
+ from markupsafe import escape
+
+ from airflow.api_fastapi.auth.managers.base_auth_manager import
COOKIE_NAME_JWT_TOKEN
+ from airflow.api_fastapi.auth.managers.models.resource_details import
DagAccessEntity, DagDetails
+ from airflow.api_fastapi.core_api.security import resolve_user_from_token
+
+ repair_app = FastAPI(
+ title="Databricks Workflow Repair",
+ description="Repair failed tasks of a Databricks workflow run from
Airflow.",
+ )
+
+ async def _resolve_request_user(request: Request):
+ """Authenticate via the bearer header (UI XHR) or the ``_token``
cookie (link navigation)."""
+ token = None
+ auth_header = request.headers.get("Authorization", "")
+ if auth_header.lower().startswith("bearer "):
+ token = auth_header.split(" ", 1)[1]
+ if not token:
+ token = request.cookies.get(COOKIE_NAME_JWT_TOKEN)
+ # resolve_user_from_token raises HTTP 401 for a missing/invalid token.
+ return await resolve_user_from_token(token)
+
+ async def _require_dag_run_edit(dag_id: str, request: Request):
+ from airflow.api_fastapi.app import get_auth_manager
+
+ user = await _resolve_request_user(request)
+ authorized = get_auth_manager().is_authorized_dag(
+ method="PUT",
+ access_entity=DagAccessEntity.RUN,
+ details=DagDetails(id=dag_id),
+ user=user,
+ )
+ if not authorized:
+ raise HTTPException(status_code=403, detail="Not authorized to
repair runs of this Dag.")
+ return user
+
+ def _serialized_task_key(dag_id: str, task: Any) -> str:
+ """
+ Reproduce an operator's ``databricks_task_key`` from a serialized task.
+
+ Serialized tasks don't expose the operator property, so mirror its
default: an explicit key
+ if one was set, else ``md5(dag_id__task_id)``.
+ """
+ import hashlib
+
+ return (
+ getattr(task, "databricks_task_key", None)
+ or hashlib.md5(f"{dag_id}__{task.task_id}".encode()).hexdigest()
+ )
+
+ def _read_launch_metadata(dag_id: str, run_id: str, launch_task_id: str,
session) -> Any:
+ """
+ Read the launch task's trusted ``WorkflowRunMetadata`` XCom (conn_id,
job_id, run_id).
+
+ The Databricks connection and run id come from here — never from the
request — so a crafted
+ link cannot redirect the repair at an arbitrary connection or
Databricks run.
+ """
+ from airflow.models.xcom import XComModel
+ from airflow.providers.databricks.operators.databricks_workflow import
WorkflowRunMetadata
+
+ result = session.scalars(
+ XComModel.get_many(
+ run_id=run_id,
+ key="return_value",
+ task_ids=launch_task_id,
+ dag_ids=dag_id,
+ limit=1,
+ )
+ ).first()
+ if result is None:
+ raise HTTPException(status_code=404, detail="Databricks workflow
run metadata not found.")
+ return WorkflowRunMetadata(**XComModel.deserialize_value(result))
+
+ def _clear_repaired_and_downstream(
+ dag, run_id: str, task_ids: list[str], session, logger: logging.Logger
+ ) -> None:
+ """
+ Clear the repaired tasks' instances and their downstream instances for
this run.
+
+ Runs inside the API server (the DB-facing component), so clearing the
repaired tasks plus
+ their downstream lets the upstream-failed dependents resume
deterministically when the
+ repaired Databricks sub-runs succeed — without clearing the whole Dag.
+ """
+ from sqlalchemy import select
+
+ from airflow.models.taskinstance import clear_task_instances
+
+ target_task_ids: set[str] = set(task_ids)
+ for task_id in task_ids:
+
target_task_ids.update(dag.get_task(task_id).get_flat_relative_ids(upstream=False))
+
+ dr = session.scalars(select(DagRun).where(DagRun.dag_id == dag.dag_id,
DagRun.run_id == run_id)).one()
+ tis_to_clear = [ti for ti in dr.get_task_instances(session=session) if
ti.task_id in target_task_ids]
+ logger.info("Clearing %s task instances after Databricks repair",
len(tis_to_clear))
+ clear_task_instances(tis_to_clear, session)
+
+ def _repair_confirmation_page(dag_id: str, run_id: str, action: str,
summary: str) -> HTMLResponse:
+ """Render the read-only confirmation page whose form issues the
state-changing POST."""
+ return HTMLResponse(
+ "<!doctype html><html><head><title>Repair Databricks
workflow</title></head><body>"
+ "<h2>Repair Databricks workflow tasks</h2>"
+ f"<p>Dag <b>{escape(dag_id)}</b>, run <b>{escape(run_id)}</b>.</p>"
+ f"<p>{escape(summary)}</p>"
+ f'<form method="post" action="{escape(action)}">'
+ '<button type="submit">Repair</button></form>'
+ "</body></html>"
+ )
+
+ @repair_app.get("/{dag_id}/{run_id}")
+ def repair_databricks_workflow_confirm(
+ dag_id: str,
+ run_id: str,
+ request: Request,
+ launch_task_id: str,
+ task_id: str | None = None,
+ repair_all: bool = False,
+ _user=Depends(_require_dag_run_edit),
+ ):
+ """Render a read-only confirmation page; the repair itself happens on
the POST below."""
+ run_id = unquote(run_id)
+ summary = (
+ "This will repair all failed tasks of the run and resume their
downstream tasks."
+ if repair_all
+ else f"This will repair task '{task_id}' and resume its downstream
tasks."
+ )
+ # Same-site relative action; SameSite=Lax on the auth cookie means a
cross-site POST cannot
+ # carry it, so moving the mutation to POST is what protects it from
CSRF.
+ action = f"{request.url.path}?{request.url.query}"
+ return _repair_confirmation_page(dag_id, run_id, action, summary)
+
+ @repair_app.post("/{dag_id}/{run_id}")
+ def repair_databricks_workflow(
+ dag_id: str,
+ run_id: str,
+ launch_task_id: str,
+ task_id: str | None = None,
+ repair_all: bool = False,
+ _user=Depends(_require_dag_run_edit),
+ ):
+ """Repair failed Databricks tasks for a workflow run and resume the
Airflow run."""
+ run_id = unquote(run_id)
+
+ # Redirect to a same-site relative path with the identifiers
percent-encoded, so the
+ # target can never be steered to another host or scheme (CodeQL
open-redirect).
+ return_url = f"/dags/{quote(dag_id, safe='')}/runs/{quote(run_id,
safe='')}"
+
+ from airflow.models.serialized_dag import SerializedDagModel
+ from airflow.utils.session import create_session
+
+ with create_session() as session:
+ dag = SerializedDagModel.get_dag(dag_id, session=session)
+ if dag is None:
+ raise HTTPException(status_code=404, detail="Dag not found.")
+
+ metadata = _read_launch_metadata(dag_id, run_id, launch_task_id,
session)
+
+ if repair_all:
+ repaired_task_ids: list[str] = [] # resolved from live
Databricks state below
+ else:
+ if task_id is None or not dag.has_task(task_id):
+ raise HTTPException(status_code=404, detail="Task not
found in Dag.")
+ repaired_task_ids = [task_id]
+
+ # Databricks API calls can fail (e.g. expired/invalid connection
token); surface a
+ # generic error to the UI without leaking the upstream exception
text.
+ try:
+ if repair_all:
+ hook = DatabricksHook(databricks_conn_id=metadata.conn_id)
+ task_keys = hook.get_run_failed_task_keys(metadata.run_id)
+ key_to_task_id = {_serialized_task_key(dag_id, t):
t.task_id for t in dag.tasks}
+ repaired_task_ids = [key_to_task_id[k] for k in task_keys
if k in key_to_task_id]
+ else:
+ task_keys = [_serialized_task_key(dag_id,
dag.get_task(repaired_task_ids[0]))]
+
+ if not task_keys:
+ log.info("No failed Databricks tasks to repair for run
%s", metadata.run_id)
+ return RedirectResponse(return_url, status_code=303)
Review Comment:
## CodeQL / URL redirection from remote source
Untrusted URL redirection depends on a [user-provided value](1).
Untrusted URL redirection depends on a [user-provided value](2).
Untrusted URL redirection depends on a [user-provided value](1).
Untrusted URL redirection depends on a [user-provided value](2).
[Show more
details](https://github.com/apache/airflow/security/code-scanning/620)
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