Feat: Alter flask to Quart for async API serving. (#11275)

### What problem does this PR solve?

#11277

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/apps/sdk/files.py

@@ -17,9 +17,7 @@
 
 import pathlib
 import re
-
-import flask
-from flask import request
+from quart import request, make_response
 from pathlib import Path
 
 from api.db.services.document_service import DocumentService
@@ -37,7 +35,7 @@ from common import settings
 
 @manager.route('/file/upload', methods=['POST'])  # noqa: F821
 @token_required
-def upload(tenant_id):
+async def upload(tenant_id):
     """
     Upload a file to the system.
     ---
@@ -79,15 +77,17 @@ def upload(tenant_id):
                     type: string
                     description: File type (e.g., document, folder)
     """
-    pf_id = request.form.get("parent_id")
+    form = await request.form
+    files = await request.files
+    pf_id = form.get("parent_id")
 
     if not pf_id:
         root_folder = FileService.get_root_folder(tenant_id)
         pf_id = root_folder["id"]
 
-    if 'file' not in request.files:
+    if 'file' not in files:
         return get_json_result(data=False, message='No file part!', code=400)
-    file_objs = request.files.getlist('file')
+    file_objs = files.getlist('file')
 
     for file_obj in file_objs:
         if file_obj.filename == '':
@@ -151,7 +151,7 @@ def upload(tenant_id):
 
 @manager.route('/file/create', methods=['POST'])  # noqa: F821
 @token_required
-def create(tenant_id):
+async def create(tenant_id):
     """
     Create a new file or folder.
     ---
@@ -193,9 +193,9 @@ def create(tenant_id):
                 type:
                   type: string
     """
-    req = request.json
-    pf_id = request.json.get("parent_id")
-    input_file_type = request.json.get("type")
+    req = await request.json
+    pf_id = await request.json.get("parent_id")
+    input_file_type = await request.json.get("type")
     if not pf_id:
         root_folder = FileService.get_root_folder(tenant_id)
         pf_id = root_folder["id"]
@@ -450,7 +450,7 @@ def get_all_parent_folders(tenant_id):
 
 @manager.route('/file/rm', methods=['POST'])  # noqa: F821
 @token_required
-def rm(tenant_id):
+async def rm(tenant_id):
     """
     Delete one or multiple files/folders.
     ---
@@ -481,7 +481,7 @@ def rm(tenant_id):
               type: boolean
               example: true
     """
-    req = request.json
+    req = await request.json
     file_ids = req["file_ids"]
     try:
         for file_id in file_ids:
@@ -524,7 +524,7 @@ def rm(tenant_id):
 
 @manager.route('/file/rename', methods=['POST'])  # noqa: F821
 @token_required
-def rename(tenant_id):
+async def rename(tenant_id):
     """
     Rename a file.
     ---
@@ -556,7 +556,7 @@ def rename(tenant_id):
               type: boolean
               example: true
     """
-    req = request.json
+    req = await request.json
     try:
         e, file = FileService.get_by_id(req["file_id"])
         if not e:
@@ -585,7 +585,7 @@ def rename(tenant_id):
 
 @manager.route('/file/get/<file_id>', methods=['GET'])  # noqa: F821
 @token_required
-def get(tenant_id, file_id):
+async def get(tenant_id, file_id):
     """
     Download a file.
     ---
@@ -619,7 +619,7 @@ def get(tenant_id, file_id):
             b, n = File2DocumentService.get_storage_address(file_id=file_id)
             blob = settings.STORAGE_IMPL.get(b, n)
 
-        response = flask.make_response(blob)
+        response = await make_response(blob)
         ext = re.search(r"\.([^.]+)$", file.name)
         if ext:
             if file.type == FileType.VISUAL.value:
@@ -633,7 +633,7 @@ def get(tenant_id, file_id):
 
 @manager.route('/file/mv', methods=['POST'])  # noqa: F821
 @token_required
-def move(tenant_id):
+async def move(tenant_id):
     """
     Move one or multiple files to another folder.
     ---
@@ -667,7 +667,7 @@ def move(tenant_id):
               type: boolean
               example: true
     """
-    req = request.json
+    req = await request.json
     try:
         file_ids = req["src_file_ids"]
         parent_id = req["dest_file_id"]
@@ -693,8 +693,8 @@ def move(tenant_id):
 
 @manager.route('/file/convert', methods=['POST'])  # noqa: F821
 @token_required
-def convert(tenant_id):
-    req = request.json
+async def convert(tenant_id):
+    req = await request.json
     kb_ids = req["kb_ids"]
     file_ids = req["file_ids"]
     file2documents = []