feat：新增大屏存取发布接口

app/api/datasource.py

@@ -0,0 +1,29 @@
+"""编辑态数据源取数：登录用户传 URL，服务端替浏览器请求，responsePath / transform 仍由前端做"""
+
+from typing import Annotated, Any, Literal
+
+from fastapi import APIRouter, Depends
+from pydantic import BaseModel, Field
+
+from app.common.response import ApiResponse, success_response
+from app.core.auth import get_current_user
+from app.schemas.user import CurrentUser
+from app.services.datasource_proxy import fetch_json
+
+router = APIRouter(prefix="/datasource", tags=["DataSource"])
+
+
+class DataSourceFetch(BaseModel):
+    url: str = Field(min_length=1, max_length=4096)
+    method: Literal["GET", "POST"] = "GET"
+    params: dict[str, Any] | None = None
+    headers: dict[str, Any] | None = None
+
+
+@router.post("/fetch")
+async def fetch_datasource(
+    body: DataSourceFetch,
+    user: Annotated[CurrentUser, Depends(get_current_user)],
+) -> ApiResponse[dict[str, Any] | list[Any]]:
+    data = await fetch_json(body.url, body.method, body.params, body.headers)
+    return success_response(data)