From 6202db458678153934fb4a31a041c58764a69138 Mon Sep 17 00:00:00 2001
From: zhangqian <zhangqian@123.com>
Date: 星期五, 18 十月 2024 22:59:51 +0800
Subject: [PATCH] 增加文件下载转发接口,把毕昇返回的文件地址改成我们的下载地址

---
 app/api/files.py |   49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 48 insertions(+), 1 deletions(-)

diff --git a/app/api/files.py b/app/api/files.py
index 5da2cc4..12c55b0 100644
--- a/app/api/files.py
+++ b/app/api/files.py
@@ -1,5 +1,10 @@
-from fastapi import Depends, APIRouter, HTTPException, UploadFile, File, requests, Query
+from typing import Optional
+
+import requests
+from fastapi import Depends, APIRouter, HTTPException, UploadFile, File, Query
+from pydantic import BaseModel
 from sqlalchemy.orm import Session
+from starlette.responses import StreamingResponse
 
 from app.api import Response, get_current_user, ResponseList
 from app.config.config import settings
@@ -9,6 +14,7 @@
 from app.service.bisheng import BishengService
 from app.service.ragflow import RagflowService
 from app.service.token import get_ragflow_token, get_bisheng_token
+import urllib.parse
 
 router = APIRouter()
 
@@ -55,3 +61,44 @@
 
     else:
         return Response(code=200, msg="Unsupported agent type")
+
+
+@router.get("/download/", response_model=Response)
+async def download_file(
+        url: Optional[str] = Query(None, description="URL of the file to download for bisheng"),
+        agent_id: str = Query(..., description="Agent ID"),
+        doc_id: Optional[str] = Query(None, description="Optional doc id for ragflow agents"),
+        doc_name: Optional[str] = Query(None, description="Optional doc name for ragflow agents"),
+        db: Session = Depends(get_db)
+):
+    agent = db.query(AgentModel).filter(AgentModel.id == agent_id).first()
+    if not agent:
+        return Response(code=404, msg="Agent not found")
+
+    if agent.agent_type == AgentType.BISHENG:
+        url = urllib.parse.unquote(url)
+        # 浠� URL 涓彁鍙栨枃浠跺悕
+        parsed_url = urllib.parse.urlparse(url)
+        filename = urllib.parse.unquote(parsed_url.path.split('/')[-1])
+        url = url.replace("http://minio:9000", settings.bisheng_base_url)
+    elif agent.agent_type == AgentType.RAGFLOW:
+        if not doc_id:
+            return Response(code=400, msg="doc_id is required")
+        url = f"{settings.ragflow_base_url}/v1/document/get/{doc_id}"
+        filename = doc_name
+    else:
+        return Response(code=400, msg="Unsupported agent type")
+
+    try:
+        # 鍙戦�丟ET璇锋眰鑾峰彇鏂囦欢鍐呭
+        response = requests.get(url, stream=True)
+        response.raise_for_status()  # 妫�鏌ヨ姹傛槸鍚︽垚鍔�
+
+        # 杩斿洖娴佸紡鍝嶅簲
+        return StreamingResponse(
+            response.iter_content(chunk_size=1024),
+            media_type="application/octet-stream",
+            headers={"Content-Disposition": f"attachment; filename*=utf-8''{urllib.parse.quote(filename)}"}
+        )
+    except Exception as e:
+        raise HTTPException(status_code=400, detail=f"Error downloading file: {e}")

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