106 lines
3.0 KiB
Python
106 lines
3.0 KiB
Python
from fastapi.routing import APIRouter
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from fastapi.responses import StreamingResponse
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from typing_extensions import Annotated
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from pydantic import Field
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from data.schemas import SelectResult, CachedCursorOut
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from fastapi import Depends
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from data.crud import (
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read_connection,
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read_select_query,
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)
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from core.dependencies import get_db, get_current_user, get_admin_user
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from core.exceptions import (
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QueryNotFound,
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ConnectionNotFound,
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PoolNotFound,
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CursorNotFound,
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)
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from dbs import mysql
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router = APIRouter()
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@router.post("/execute", dependencies=[Depends(get_current_user)])
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async def execute_select(
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query_id: int,
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connection_id: int,
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page_size: Annotated[int, Field(ge=1, le=100)] = 50,
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db=Depends(get_db),
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) -> SelectResult:
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query = await read_select_query(db=db, query_id=query_id)
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if query is None:
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raise QueryNotFound
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connection = await read_connection(db=db, connection_id=connection_id)
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if connection is None:
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raise ConnectionNotFound
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pool = mysql.pools.get(connection.id, None)
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if pool is None:
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raise PoolNotFound
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raw_result, rowcount = await mysql.execute_select_query(
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pool=pool, sql_query=query.sql, params=query.params, fetch_num=page_size
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)
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results = mysql.dict_result_to_list(result=mysql.serializer(raw_result=raw_result))
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return SelectResult(
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cursor=CachedCursorOut(
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id=None,
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connection_id=connection_id,
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query=query,
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row_count=rowcount,
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fetched_rows=len(results.data),
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is_closed=True,
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has_more=len(results.data) != rowcount,
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ttl=-1,
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close_at=-1,
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),
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results=results,
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)
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@router.get(path="/fetch_cursor", dependencies=[Depends(get_current_user)])
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async def fetch_cursor(
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cursor_id: str,
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page_size: Annotated[int, Field(ge=1, le=1000)] = 50,
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) -> SelectResult:
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cached_cursor = mysql.cached_cursors.get(cursor_id, None)
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if cached_cursor is None:
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raise CursorNotFound
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result = await cached_cursor.fetch_many(size=page_size)
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if cached_cursor.done:
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mysql.cached_cursors.pop(cursor_id, None)
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return SelectResult(
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cursor=cached_cursor,
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results={"columns": cached_cursor.query.columns, "data": result},
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)
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@router.get("/sse-stream-cursor", dependencies=[Depends(get_current_user)], status_code=200)
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async def server_side_events_stream_cursor(
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cursor_id: str,
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page_size: Annotated[int, Field(ge=1, le=1000)] = 50,
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):
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cached_cursor = mysql.cached_cursors.get(cursor_id, None)
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if cached_cursor is None:
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raise CursorNotFound
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async def stream():
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while True:
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result = await fetch_cursor(cursor_id=cursor_id, page_size=page_size)
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serialized_result = (
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result.model_dump_json()
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)
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yield f"data: {serialized_result}\n\n" # Format as Server-Sent Event (SSE)
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if result.cursor.is_closed:
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break
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return StreamingResponse(stream(), media_type="text/event-stream")
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