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feat: Add MCP Server Settings to projects, rename Folder to Project (#7741)

Browse source 
Co-authored-by: Lucas Oliveira <lucas.edu.oli@hotmail.com>
Co-authored-by: deon-sanchez <deon.sanchez@datastax.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Lucas Oliveira <62335616+lucaseduoli@users.noreply.github.com>
Co-authored-by: Eric Hare <ericrhare@gmail.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>
Co-authored-by: Cristhian Zanforlin Lousa <cristhian.lousa@gmail.com>
Co-authored-by: phact <estevezsebastian@gmail.com>
This commit is contained in:
Edwin Jose 2025-04-29 13:14:55 -04:00 • committed by GitHub
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95 changed files with 4434 additions and 804 deletions
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54
src/backend/base/langflow/alembic/versions/66f72f04a1de_add_mcp_support_with_project_settings_.py Normal file
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@ -0,0 +1,54 @@
"""Add MCP support with project settings in flows
Revision ID: 66f72f04a1de
Revises: e56d87f8994a
Create Date: 2025-04-24 18:42:15.828332
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa
import sqlmodel
from sqlalchemy.engine.reflection import Inspector
from langflow.utils import migration
# revision identifiers, used by Alembic.
revision: str = '66f72f04a1de'
down_revision: Union[str, None] = 'e56d87f8994a'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None
def upgrade() -> None:
conn = op.get_bind()
inspector = sa.inspect(conn) # type: ignore
column_names = [column["name"] for column in inspector.get_columns("flow")]
# ### commands auto generated by Alembic - please adjust! ###
with op.batch_alter_table('flow', schema=None) as batch_op:
if 'mcp_enabled' not in column_names:
batch_op.add_column(sa.Column('mcp_enabled', sa.Boolean(), nullable=True))
if 'action_name' not in column_names:
batch_op.add_column(sa.Column('action_name', sqlmodel.sql.sqltypes.AutoString(), nullable=True))
if 'action_description' not in column_names:
batch_op.add_column(sa.Column('action_description', sa.Text(), nullable=True))
# ### end Alembic commands ###
def downgrade() -> None:
conn = op.get_bind()
inspector = sa.inspect(conn) # type: ignore
column_names = [column["name"] for column in inspector.get_columns("flow")]
# ### commands auto generated by Alembic - please adjust! ###
with op.batch_alter_table('flow', schema=None) as batch_op:
if 'action_description' in column_names:
batch_op.drop_column('action_description')
if 'action_name' in column_names:
batch_op.drop_column('action_name')
if 'mcp_enabled' in column_names:
batch_op.drop_column('mcp_enabled')
# ### end Alembic commands ###

4
src/backend/base/langflow/api/router.py
View file

@ -9,8 +9,10 @@ from langflow.api.v1 import (
flows_router,
folders_router,
login_router,
mcp_projects_router,
mcp_router,
monitor_router,
projects_router,
starter_projects_router,
store_router,
users_router,
@ -44,9 +46,11 @@ router_v1.include_router(variables_router)
router_v1.include_router(files_router)
router_v1.include_router(monitor_router)
router_v1.include_router(folders_router)
router_v1.include_router(projects_router)
router_v1.include_router(starter_projects_router)
router_v1.include_router(voice_mode_router)
router_v1.include_router(mcp_router)
router_v1.include_router(mcp_projects_router)
router_v2.include_router(files_router_v2)

4
src/backend/base/langflow/api/v1/__init__.py
View file

@ -6,7 +6,9 @@ from langflow.api.v1.flows import router as flows_router
from langflow.api.v1.folders import router as folders_router
from langflow.api.v1.login import router as login_router
from langflow.api.v1.mcp import router as mcp_router
from langflow.api.v1.mcp_projects import router as mcp_projects_router
from langflow.api.v1.monitor import router as monitor_router
from langflow.api.v1.projects import router as projects_router
from langflow.api.v1.starter_projects import router as starter_projects_router
from langflow.api.v1.store import router as store_router
from langflow.api.v1.users import router as users_router
@ -22,8 +24,10 @@ __all__ = [
"flows_router",
"folders_router",
"login_router",
"mcp_projects_router",
"mcp_router",
"monitor_router",
"projects_router",
"starter_projects_router",
"store_router",
"users_router",

8
src/backend/base/langflow/api/v1/flows.py
View file

@ -191,7 +191,7 @@ async def read_flows(
get_all (bool, optional): Whether to return all flows without pagination. Defaults to True.
**This field must be True because of backward compatibility with the frontend - Release: 1.0.20**
folder_id (UUID, optional): The folder ID. Defaults to None.
folder_id (UUID, optional): The project ID. Defaults to None.
params (Params): Pagination parameters.
remove_example_flows (bool, optional): Whether to remove example flows. Defaults to False.
header_flows (bool, optional): Whether to return only specific headers of the flows. Defaults to False.
@ -212,7 +212,7 @@ async def read_flows(
if not starter_folder and not default_folder:
raise HTTPException(
status_code=404,
detail="Starter folder and default folder not found. Please create a folder and add flows to it.",
detail="Starter project and default project not found. Please create a project and add flows to it.",
)
if not folder_id:
@ -536,13 +536,13 @@ async def read_basic_examples(
list[FlowRead]: A list of basic example flows.
"""
try:
# Get the starter folder
# Get the starter project
starter_folder = (await session.exec(select(Folder).where(Folder.name == STARTER_FOLDER_NAME))).first()
if not starter_folder:
return []
# Get all flows in the starter folder
# Get all flows in the starter project
flows = (await session.exec(select(Flow).where(Flow.folder_id == starter_folder.id))).all()
# Return compressed response using our utility function

340
src/backend/base/langflow/api/v1/folders.py
View file

@ -1,347 +1,95 @@
import io
import json
import zipfile
from datetime import datetime, timezone
from typing import Annotated
from uuid import UUID
import orjson
from fastapi import APIRouter, Depends, File, HTTPException, Response, UploadFile, status
from fastapi.encoders import jsonable_encoder
from fastapi.responses import StreamingResponse
from fastapi import APIRouter, Depends, status
from fastapi.responses import RedirectResponse
from fastapi_pagination import Params
from fastapi_pagination.ext.sqlmodel import paginate
from sqlalchemy import or_, update
from sqlalchemy.orm import selectinload
from sqlmodel import select
from langflow.api.utils import CurrentActiveUser, DbSession, cascade_delete_flow, custom_params, remove_api_keys
from langflow.api.v1.flows import create_flows
from langflow.api.v1.schemas import FlowListCreate
from langflow.helpers.flow import generate_unique_flow_name
from langflow.helpers.folders import generate_unique_folder_name
from langflow.initial_setup.constants import STARTER_FOLDER_NAME
from langflow.services.database.models.flow.model import Flow, FlowCreate, FlowRead
from langflow.services.database.models.folder.constants import DEFAULT_FOLDER_NAME
from langflow.api.utils import custom_params
from langflow.services.database.models.flow.model import FlowRead
from langflow.services.database.models.folder.model import (
Folder,
FolderCreate,
FolderRead,
FolderReadWithFlows,
FolderUpdate,
)
from langflow.services.database.models.folder.pagination_model import FolderWithPaginatedFlows
router = APIRouter(prefix="/folders", tags=["Folders"])
# This file now serves as a redirection to the projects endpoint
# All routes will redirect to the corresponding projects endpoint
@router.post("/", response_model=FolderRead, status_code=201)
async def create_folder(
*,
session: DbSession,
folder: FolderCreate,
current_user: CurrentActiveUser,
):
try:
new_folder = Folder.model_validate(folder, from_attributes=True)
new_folder.user_id = current_user.id
# First check if the folder.name is unique
# there might be flows with name like: "MyFlow", "MyFlow (1)", "MyFlow (2)"
# so we need to check if the name is unique with `like` operator
# if we find a flow with the same name, we add a number to the end of the name
# based on the highest number found
if (
await session.exec(
statement=select(Folder).where(Folder.name == new_folder.name).where(Folder.user_id == current_user.id)
)
).first():
folder_results = await session.exec(
select(Folder).where(
Folder.name.like(f"{new_folder.name}%"), # type: ignore[attr-defined]
Folder.user_id == current_user.id,
)
)
if folder_results:
folder_names = [folder.name for folder in folder_results]
folder_numbers = [int(name.split("(")[-1].split(")")[0]) for name in folder_names if "(" in name]
if folder_numbers:
new_folder.name = f"{new_folder.name} ({max(folder_numbers) + 1})"
else:
new_folder.name = f"{new_folder.name} (1)"
session.add(new_folder)
await session.commit()
await session.refresh(new_folder)
if folder.components_list:
update_statement_components = (
update(Flow).where(Flow.id.in_(folder.components_list)).values(folder_id=new_folder.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_components)
await session.commit()
if folder.flows_list:
update_statement_flows = update(Flow).where(Flow.id.in_(folder.flows_list)).values(folder_id=new_folder.id) # type: ignore[attr-defined]
await session.exec(update_statement_flows)
await session.commit()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
return new_folder
async def create_folder_redirect():
"""Redirect to the projects endpoint."""
return RedirectResponse(url="/api/v1/projects/", status_code=status.HTTP_307_TEMPORARY_REDIRECT)
@router.get("/", response_model=list[FolderRead], status_code=200)
async def read_folders(
*,
session: DbSession,
current_user: CurrentActiveUser,
):
try:
folders = (
await session.exec(
select(Folder).where(
or_(Folder.user_id == current_user.id, Folder.user_id == None) # noqa: E711
)
)
).all()
folders = [folder for folder in folders if folder.name != STARTER_FOLDER_NAME]
return sorted(folders, key=lambda x: x.name != DEFAULT_FOLDER_NAME)
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
async def read_folders_redirect():
"""Redirect to the projects endpoint."""
return RedirectResponse(url="/api/v1/projects/", status_code=status.HTTP_307_TEMPORARY_REDIRECT)
@router.get("/{folder_id}", response_model=FolderWithPaginatedFlows | FolderReadWithFlows, status_code=200)
async def read_folder(
async def read_folder_redirect(
*,
session: DbSession,
folder_id: UUID,
current_user: CurrentActiveUser,
params: Annotated[Params | None, Depends(custom_params)],
is_component: bool = False,
is_flow: bool = False,
search: str = "",
):
try:
folder = (
await session.exec(
select(Folder)
.options(selectinload(Folder.flows))
.where(Folder.id == folder_id, Folder.user_id == current_user.id)
)
).first()
except Exception as e:
if "No result found" in str(e):
raise HTTPException(status_code=404, detail="Folder not found") from e
raise HTTPException(status_code=500, detail=str(e)) from e
"""Redirect to the projects endpoint."""
redirect_url = f"/api/v1/projects/{folder_id}"
params_list = []
if is_component:
params_list.append(f"is_component={is_component}")
if is_flow:
params_list.append(f"is_flow={is_flow}")
if search:
params_list.append(f"search={search}")
if params and params.page:
params_list.append(f"page={params.page}")
if params and params.size:
params_list.append(f"size={params.size}")
if not folder:
raise HTTPException(status_code=404, detail="Folder not found")
if params_list:
redirect_url += "?" + "&".join(params_list)
try:
if params and params.page and params.size:
stmt = select(Flow).where(Flow.folder_id == folder_id)
if Flow.updated_at is not None:
stmt = stmt.order_by(Flow.updated_at.desc()) # type: ignore[attr-defined]
if is_component:
stmt = stmt.where(Flow.is_component == True) # noqa: E712
if is_flow:
stmt = stmt.where(Flow.is_component == False) # noqa: E712
if search:
stmt = stmt.where(Flow.name.like(f"%{search}%")) # type: ignore[attr-defined]
paginated_flows = await paginate(session, stmt, params=params)
return FolderWithPaginatedFlows(folder=FolderRead.model_validate(folder), flows=paginated_flows)
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
flows_from_current_user_in_folder = [flow for flow in folder.flows if flow.user_id == current_user.id]
folder.flows = flows_from_current_user_in_folder
return folder
return RedirectResponse(url=redirect_url, status_code=status.HTTP_307_TEMPORARY_REDIRECT)
@router.patch("/{folder_id}", response_model=FolderRead, status_code=200)
async def update_folder(
async def update_folder_redirect(
*,
session: DbSession,
folder_id: UUID,
folder: FolderUpdate, # Assuming FolderUpdate is a Pydantic model defining updatable fields
current_user: CurrentActiveUser,
):
try:
existing_folder = (
await session.exec(select(Folder).where(Folder.id == folder_id, Folder.user_id == current_user.id))
).first()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
if not existing_folder:
raise HTTPException(status_code=404, detail="Folder not found")
try:
if folder.name and folder.name != existing_folder.name:
existing_folder.name = folder.name
session.add(existing_folder)
await session.commit()
await session.refresh(existing_folder)
return existing_folder
folder_data = existing_folder.model_dump(exclude_unset=True)
for key, value in folder_data.items():
if key not in {"components", "flows"}:
setattr(existing_folder, key, value)
session.add(existing_folder)
await session.commit()
await session.refresh(existing_folder)
concat_folder_components = folder.components + folder.flows
flows_ids = (await session.exec(select(Flow.id).where(Flow.folder_id == existing_folder.id))).all()
excluded_flows = list(set(flows_ids) - set(concat_folder_components))
my_collection_folder = (await session.exec(select(Folder).where(Folder.name == DEFAULT_FOLDER_NAME))).first()
if my_collection_folder:
update_statement_my_collection = (
update(Flow).where(Flow.id.in_(excluded_flows)).values(folder_id=my_collection_folder.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_my_collection)
await session.commit()
if concat_folder_components:
update_statement_components = (
update(Flow).where(Flow.id.in_(concat_folder_components)).values(folder_id=existing_folder.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_components)
await session.commit()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
return existing_folder
"""Redirect to the projects endpoint."""
return RedirectResponse(url=f"/api/v1/projects/{folder_id}", status_code=status.HTTP_307_TEMPORARY_REDIRECT)
@router.delete("/{folder_id}", status_code=204)
async def delete_folder(
async def delete_folder_redirect(
*,
session: DbSession,
folder_id: UUID,
current_user: CurrentActiveUser,
):
try:
flows = (
await session.exec(select(Flow).where(Flow.folder_id == folder_id, Flow.user_id == current_user.id))
).all()
if len(flows) > 0:
for flow in flows:
await cascade_delete_flow(session, flow.id)
folder = (
await session.exec(select(Folder).where(Folder.id == folder_id, Folder.user_id == current_user.id))
).first()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
if not folder:
raise HTTPException(status_code=404, detail="Folder not found")
try:
await session.delete(folder)
await session.commit()
return Response(status_code=status.HTTP_204_NO_CONTENT)
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
"""Redirect to the projects endpoint."""
return RedirectResponse(url=f"/api/v1/projects/{folder_id}", status_code=status.HTTP_307_TEMPORARY_REDIRECT)
@router.get("/download/{folder_id}", status_code=200)
async def download_file(
async def download_file_redirect(
*,
session: DbSession,
folder_id: UUID,
current_user: CurrentActiveUser,
):
"""Download all flows from folder as a zip file."""
try:
query = select(Folder).where(Folder.id == folder_id, Folder.user_id == current_user.id)
result = await session.exec(query)
folder = result.first()
if not folder:
raise HTTPException(status_code=404, detail="Folder not found")
flows_query = select(Flow).where(Flow.folder_id == folder_id)
flows_result = await session.exec(flows_query)
flows = [FlowRead.model_validate(flow, from_attributes=True) for flow in flows_result.all()]
if not flows:
raise HTTPException(status_code=404, detail="No flows found in folder")
flows_without_api_keys = [remove_api_keys(flow.model_dump()) for flow in flows]
zip_stream = io.BytesIO()
with zipfile.ZipFile(zip_stream, "w") as zip_file:
for flow in flows_without_api_keys:
flow_json = json.dumps(jsonable_encoder(flow))
zip_file.writestr(f"{flow['name']}.json", flow_json)
zip_stream.seek(0)
current_time = datetime.now(tz=timezone.utc).astimezone().strftime("%Y%m%d_%H%M%S")
filename = f"{current_time}_{folder.name}_flows.zip"
return StreamingResponse(
zip_stream,
media_type="application/x-zip-compressed",
headers={"Content-Disposition": f"attachment; filename={filename}"},
)
except Exception as e:
if "No result found" in str(e):
raise HTTPException(status_code=404, detail="Folder not found") from e
raise HTTPException(status_code=500, detail=str(e)) from e
"""Redirect to the projects endpoint."""
return RedirectResponse(
url=f"/api/v1/projects/download/{folder_id}", status_code=status.HTTP_307_TEMPORARY_REDIRECT
)
@router.post("/upload/", response_model=list[FlowRead], status_code=201)
async def upload_file(
*,
session: DbSession,
file: Annotated[UploadFile, File(...)],
current_user: CurrentActiveUser,
):
"""Upload flows from a file."""
contents = await file.read()
data = orjson.loads(contents)
if not data:
raise HTTPException(status_code=400, detail="No flows found in the file")
folder_name = await generate_unique_folder_name(data["folder_name"], current_user.id, session)
data["folder_name"] = folder_name
folder = FolderCreate(name=data["folder_name"], description=data["folder_description"])
new_folder = Folder.model_validate(folder, from_attributes=True)
new_folder.id = None
new_folder.user_id = current_user.id
session.add(new_folder)
await session.commit()
await session.refresh(new_folder)
del data["folder_name"]
del data["folder_description"]
if "flows" in data:
flow_list = FlowListCreate(flows=[FlowCreate(**flow) for flow in data["flows"]])
else:
raise HTTPException(status_code=400, detail="No flows found in the data")
# Now we set the user_id for all flows
for flow in flow_list.flows:
flow_name = await generate_unique_flow_name(flow.name, current_user.id, session)
flow.name = flow_name
flow.user_id = current_user.id
flow.folder_id = new_folder.id
return await create_flows(session=session, flow_list=flow_list, current_user=current_user)
async def upload_file_redirect():
"""Redirect to the projects endpoint."""
return RedirectResponse(url="/api/v1/projects/upload/", status_code=status.HTTP_307_TEMPORARY_REDIRECT)

2
src/backend/base/langflow/api/v1/login.py
View file

@ -67,7 +67,7 @@ async def login_to_get_access_token(
domain=auth_settings.COOKIE_DOMAIN,
)
await get_variable_service().initialize_user_variables(user.id, db)
# Create default folder for user if it doesn't exist
# Create default project for user if it doesn't exist
_ = await get_or_create_default_folder(db, user.id)
return tokens
raise HTTPException(

42
src/backend/base/langflow/api/v1/mcp.py
View file

@ -10,8 +10,8 @@ from uuid import uuid4
import pydantic
from anyio import BrokenResourceError
from fastapi import APIRouter, Depends, HTTPException, Request
from fastapi.responses import StreamingResponse
from fastapi import APIRouter, Depends, HTTPException, Request, Response
from fastapi.responses import HTMLResponse, StreamingResponse
from loguru import logger
from mcp import types
from mcp.server import NotificationOptions, Server
@ -185,14 +185,19 @@ async def handle_list_tools():
continue
flow_name = "_".join(flow.name.lower().split())
tool = types.Tool(
name=flow_name,
description=f"{flow.id}: {flow.description}"
if flow.description
else f"Tool generated from flow: {flow_name}",
inputSchema=json_schema_from_flow(flow),
)
tools.append(tool)
try:
tool = types.Tool(
name=flow_name,
description=f"{flow.id}: {flow.description}"
if flow.description
else f"Tool generated from flow: {flow_name}",
inputSchema=json_schema_from_flow(flow),
)
tools.append(tool)
except Exception as e: # noqa: BLE001
msg = f"Error in listing tools: {e!s} from flow: {flow_name}"
logger.warning(msg)
continue
except Exception as e:
msg = f"Error in listing tools: {e!s}"
logger.exception(msg)
@ -281,6 +286,11 @@ async def handle_call_tool(name: str, arguments: dict) -> list[types.TextContent
)
if message:
collected_results.append(types.TextContent(type="text", text=str(message)))
if event_data.get("event") == "error":
content_blocks = event_data.get("data", {}).get("content_blocks", [])
text = event_data.get("data", {}).get("text", "")
error_msg = f"Error Executing the {flow.name} tool. Error: {text} Details: {content_blocks}"
collected_results.append(types.TextContent(type="text", text=error_msg))
except json.JSONDecodeError:
msg = f"Failed to parse event data: {line}"
logger.warning(msg)
@ -322,8 +332,15 @@ def find_validation_error(exc):
return None
@router.head("/sse", response_class=HTMLResponse, include_in_schema=False)
async def im_alive():
return Response()
@router.get("/sse", response_class=StreamingResponse)
async def handle_sse(request: Request, current_user: Annotated[User, Depends(get_current_active_user)]):
msg = f"Starting SSE connection, server name: {server.name}"
logger.info(msg)
token = current_user_ctx.set(current_user)
try:
async with sse.connect_sse(request.scope, request.receive, request._send) as streams:
@ -369,6 +386,9 @@ async def handle_sse(request: Request, current_user: Annotated[User, Depends(get
async def handle_messages(request: Request):
try:
await sse.handle_post_message(request.scope, request.receive, request._send)
except BrokenResourceError as e:
except (BrokenResourceError, BrokenPipeError) as e:
logger.info("MCP Server disconnected")
raise HTTPException(status_code=404, detail=f"MCP Server disconnected, error: {e}") from e
except Exception as e:
logger.error(f"Internal server error: {e}")
raise HTTPException(status_code=500, detail=f"Internal server error: {e}") from e

556
src/backend/base/langflow/api/v1/mcp_projects.py Normal file
View file

@ -0,0 +1,556 @@
import asyncio
import base64
import json
import logging
from contextvars import ContextVar
from datetime import datetime, timezone
from typing import Annotated
from urllib.parse import quote, unquote, urlparse
from uuid import UUID, uuid4
from anyio import BrokenResourceError
from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, Request, Response
from fastapi.responses import HTMLResponse
from mcp import types
from mcp.server import NotificationOptions, Server
from mcp.server.sse import SseServerTransport
from sqlalchemy.orm import selectinload
from sqlmodel import select
from langflow.api.v1.chat import build_flow_and_stream
from langflow.api.v1.mcp import (
current_user_ctx,
get_mcp_config,
handle_mcp_errors,
with_db_session,
)
from langflow.api.v1.schemas import InputValueRequest, MCPSettings
from langflow.base.mcp.util import get_flow_snake_case
from langflow.helpers.flow import json_schema_from_flow
from langflow.services.auth.utils import get_current_active_user, get_current_user
from langflow.services.database.models import Flow, Folder, User
from langflow.services.deps import get_db_service, get_settings_service, get_storage_service
from langflow.services.storage.utils import build_content_type_from_extension
logger = logging.getLogger(__name__)
router = APIRouter(prefix="/mcp/project", tags=["mcp_projects"])
# Create a context variable to store the current project
current_project_ctx: ContextVar[UUID | None] = ContextVar("current_project_ctx", default=None)
# Create a mapping of project-specific SSE transports
project_sse_transports = {}
def get_project_sse(project_id: UUID) -> SseServerTransport:
"""Get or create an SSE transport for a specific project."""
project_id_str = str(project_id)
if project_id_str not in project_sse_transports:
project_sse_transports[project_id_str] = SseServerTransport(f"/api/v1/mcp/project/{project_id_str}/")
return project_sse_transports[project_id_str]
@router.get("/{project_id}", response_model=list[MCPSettings], dependencies=[Depends(get_current_user)])
async def list_project_tools(
project_id: UUID,
current_user: Annotated[User, Depends(get_current_active_user)],
*,
mcp_enabled: bool = True,
):
"""List all tools in a project that are enabled for MCP."""
tools: list[MCPSettings] = []
try:
db_service = get_db_service()
async with db_service.with_session() as session:
# Fetch the project first to verify it exists and belongs to the current user
project = (
await session.exec(
select(Folder)
.options(selectinload(Folder.flows))
.where(Folder.id == project_id, Folder.user_id == current_user.id)
)
).first()
if not project:
raise HTTPException(status_code=404, detail="Project not found")
# Query flows in the project
flows_query = select(Flow).where(Flow.folder_id == project_id)
# Optionally filter for MCP-enabled flows only
if mcp_enabled:
flows_query = flows_query.where(Flow.mcp_enabled == True) # noqa: E712
flows = (await session.exec(flows_query)).all()
for flow in flows:
if flow.user_id is None:
continue
# Format the flow name according to MCP conventions (snake_case)
flow_name = "_".join(flow.name.lower().split())
# Use action_name and action_description if available, otherwise use defaults
name = flow.action_name or flow_name
description = flow.action_description or (
flow.description if flow.description else f"Tool generated from flow: {flow_name}"
)
try:
tool = MCPSettings(
id=str(flow.id),
action_name=name,
action_description=description,
mcp_enabled=flow.mcp_enabled,
# inputSchema=json_schema_from_flow(flow),
name=flow.name,
description=flow.description,
)
tools.append(tool)
except Exception as e: # noqa: BLE001
msg = f"Error in listing project tools: {e!s} from flow: {name}"
logger.warning(msg)
continue
except Exception as e:
msg = f"Error listing project tools: {e!s}"
logger.exception(msg)
raise HTTPException(status_code=500, detail=str(e)) from e
return tools
# Project-specific MCP server instance for handling project-specific tools
class ProjectMCPServer:
def __init__(self, project_id: UUID):
self.project_id = project_id
self.server = Server(f"langflow-mcp-project-{project_id}")
# Register handlers that filter by project
@self.server.list_tools()
@handle_mcp_errors
async def handle_list_project_tools():
"""Handle listing tools for this specific project."""
tools = []
try:
db_service = get_db_service()
async with db_service.with_session() as session:
# Get flows with mcp_enabled flag set to True and in this project
flows = (
await session.exec(
select(Flow).where(Flow.mcp_enabled == True, Flow.folder_id == self.project_id) # noqa: E712
)
).all()
for flow in flows:
if flow.user_id is None:
continue
# Use action_name if available, otherwise construct from flow name
name = flow.action_name or "_".join(flow.name.lower().split())
# Use action_description if available, otherwise use defaults
description = flow.action_description or (
flow.description if flow.description else f"Tool generated from flow: {name}"
)
tool = types.Tool(
name=name,
description=description,
inputSchema=json_schema_from_flow(flow),
)
tools.append(tool)
except Exception as e: # noqa: BLE001
msg = f"Error in listing project tools: {e!s} from flow: {name}"
logger.warning(msg)
return tools
@self.server.list_prompts()
async def handle_list_prompts():
return []
@self.server.list_resources()
async def handle_list_resources():
resources = []
try:
db_service = get_db_service()
storage_service = get_storage_service()
settings_service = get_settings_service()
# Build full URL from settings
host = getattr(settings_service.settings, "host", "localhost")
port = getattr(settings_service.settings, "port", 3000)
base_url = f"http://{host}:{port}".rstrip("/")
async with db_service.with_session() as session:
flows = (await session.exec(select(Flow))).all()
for flow in flows:
if flow.id:
try:
files = await storage_service.list_files(flow_id=str(flow.id))
for file_name in files:
# URL encode the filename
safe_filename = quote(file_name)
resource = types.Resource(
uri=f"{base_url}/api/v1/files/{flow.id}/{safe_filename}",
name=file_name,
description=f"File in flow: {flow.name}",
mimeType=build_content_type_from_extension(file_name),
)
resources.append(resource)
except FileNotFoundError as e:
msg = f"Error listing files for flow {flow.id}: {e}"
logger.debug(msg)
continue
except Exception as e:
msg = f"Error in listing resources: {e!s}"
logger.exception(msg)
raise
return resources
@self.server.read_resource()
async def handle_read_resource(uri: str) -> bytes:
"""Handle resource read requests."""
try:
# Parse the URI properly
parsed_uri = urlparse(str(uri))
# Path will be like /api/v1/files/{flow_id}/{filename}
path_parts = parsed_uri.path.split("/")
# Remove empty strings from split
path_parts = [p for p in path_parts if p]
# The flow_id and filename should be the last two parts
two = 2
if len(path_parts) < two:
msg = f"Invalid URI format: {uri}"
raise ValueError(msg)
flow_id = path_parts[-2]
filename = unquote(path_parts[-1]) # URL decode the filename
storage_service = get_storage_service()
# Read the file content
content = await storage_service.get_file(flow_id=flow_id, file_name=filename)
if not content:
msg = f"File {filename} not found in flow {flow_id}"
raise ValueError(msg)
# Ensure content is base64 encoded
if isinstance(content, str):
content = content.encode()
return base64.b64encode(content)
except Exception as e:
msg = f"Error reading resource {uri}: {e!s}"
logger.exception(msg)
raise
@self.server.call_tool()
@handle_mcp_errors
async def handle_call_tool(name: str, arguments: dict) -> list[types.TextContent]:
"""Handle tool execution requests."""
mcp_config = get_mcp_config()
if mcp_config.enable_progress_notifications is None:
settings_service = get_settings_service()
mcp_config.enable_progress_notifications = (
settings_service.settings.mcp_server_enable_progress_notifications
)
background_tasks = BackgroundTasks()
current_user = current_user_ctx.get()
async def execute_tool(session):
# get flow id from name
flow = await get_flow_snake_case(name, current_user.id, session, is_action=True)
if not flow:
msg = f"Flow with name '{name}' not found"
raise ValueError(msg)
flow_id = flow.id
# Process inputs
processed_inputs = dict(arguments)
# Initial progress notification
if mcp_config.enable_progress_notifications and (
progress_token := self.server.request_context.meta.progressToken
):
await self.server.request_context.session.send_progress_notification(
progress_token=progress_token, progress=0.0, total=1.0
)
conversation_id = str(uuid4())
input_request = InputValueRequest(
input_value=processed_inputs.get("input_value", ""),
components=[],
type="chat",
session=conversation_id,
)
async def send_progress_updates():
if not (
mcp_config.enable_progress_notifications and self.server.request_context.meta.progressToken
):
return
try:
progress = 0.0
while True:
await self.server.request_context.session.send_progress_notification(
progress_token=progress_token, progress=min(0.9, progress), total=1.0
)
progress += 0.1
await asyncio.sleep(1.0)
except asyncio.CancelledError:
if mcp_config.enable_progress_notifications:
await self.server.request_context.session.send_progress_notification(
progress_token=progress_token, progress=1.0, total=1.0
)
raise
collected_results = []
try:
progress_task = asyncio.create_task(send_progress_updates())
try:
response = await build_flow_and_stream(
flow_id=flow_id,
inputs=input_request,
background_tasks=background_tasks,
current_user=current_user,
)
async for line in response.body_iterator:
if not line:
continue
try:
event_data = json.loads(line)
if event_data.get("event") == "end_vertex":
message = (
event_data.get("data", {})
.get("build_data", {})
.get("data", {})
.get("results", {})
.get("message", {})
.get("text", "")
)
if message:
collected_results.append(types.TextContent(type="text", text=str(message)))
if event_data.get("event") == "error":
content_blocks = event_data.get("data", {}).get("content_blocks", [])
text = event_data.get("data", {}).get("text", "")
error_msg = (
f"Error Executing the {flow.name} tool. Error: {text} Details: {content_blocks}"
)
collected_results.append(types.TextContent(type="text", text=error_msg))
except json.JSONDecodeError:
msg = f"Failed to parse event data: {line}"
logger.warning(msg)
continue
return collected_results
finally:
progress_task.cancel()
await asyncio.wait([progress_task])
if not progress_task.cancelled() and (exc := progress_task.exception()) is not None:
raise exc
except Exception:
if mcp_config.enable_progress_notifications and (
progress_token := self.server.request_context.meta.progressToken
):
await self.server.request_context.session.send_progress_notification(
progress_token=progress_token, progress=1.0, total=1.0
)
raise
try:
return await with_db_session(execute_tool)
except Exception as e:
msg = f"Error executing tool {name}: {e!s}"
logger.exception(msg)
raise
# Cache of project MCP servers
project_mcp_servers = {}
def get_project_mcp_server(project_id: UUID) -> ProjectMCPServer:
"""Get or create an MCP server for a specific project."""
project_id_str = str(project_id)
if project_id_str not in project_mcp_servers:
project_mcp_servers[project_id_str] = ProjectMCPServer(project_id)
return project_mcp_servers[project_id_str]
async def init_mcp_servers():
"""Initialize MCP servers for all projects."""
try:
db_service = get_db_service()
async with db_service.with_session() as session:
projects = (await session.exec(select(Folder))).all()
for project in projects:
try:
get_project_sse(project.id)
get_project_mcp_server(project.id)
except Exception as e:
msg = f"Failed to initialize MCP server for project {project.id}: {e}"
logger.exception(msg)
# Continue to next project even if this one fails
except Exception as e:
msg = f"Failed to initialize MCP servers: {e}"
logger.exception(msg)
@router.head("/{project_id}/sse", response_class=HTMLResponse, include_in_schema=False)
async def im_alive():
return Response()
@router.get("/{project_id}/sse", response_class=HTMLResponse, dependencies=[Depends(get_current_user)])
async def handle_project_sse(
project_id: UUID,
request: Request,
current_user: Annotated[User, Depends(get_current_active_user)],
):
"""Handle SSE connections for a specific project."""
# Verify project exists and user has access
db_service = get_db_service()
async with db_service.with_session() as session:
project = (
await session.exec(select(Folder).where(Folder.id == project_id, Folder.user_id == current_user.id))
).first()
if not project:
raise HTTPException(status_code=404, detail="Project not found")
# Get project-specific SSE transport and MCP server
sse = get_project_sse(project_id)
project_server = get_project_mcp_server(project_id)
msg = f"Project MCP server name: {project_server.server.name}"
logger.info(msg)
# Set context variables
user_token = current_user_ctx.set(current_user)
project_token = current_project_ctx.set(project_id)
try:
async with sse.connect_sse(request.scope, request.receive, request._send) as streams:
try:
logger.debug("Starting SSE connection for project %s", project_id)
notification_options = NotificationOptions(
prompts_changed=True, resources_changed=True, tools_changed=True
)
init_options = project_server.server.create_initialization_options(notification_options)
try:
await project_server.server.run(streams[0], streams[1], init_options)
except Exception:
logger.exception("Error in project MCP")
except BrokenResourceError:
logger.info("Client disconnected from project SSE connection")
except asyncio.CancelledError:
logger.info("Project SSE connection was cancelled")
raise
except Exception:
logger.exception("Error in project MCP")
raise
finally:
current_user_ctx.reset(user_token)
current_project_ctx.reset(project_token)
return Response(status_code=200)
@router.post("/{project_id}", dependencies=[Depends(get_current_user)])
async def handle_project_messages(
project_id: UUID, request: Request, current_user: Annotated[User, Depends(get_current_active_user)]
):
"""Handle POST messages for a project-specific MCP server."""
# Verify project exists and user has access
db_service = get_db_service()
async with db_service.with_session() as session:
project = (
await session.exec(select(Folder).where(Folder.id == project_id, Folder.user_id == current_user.id))
).first()
if not project:
raise HTTPException(status_code=404, detail="Project not found")
# Set context variables
user_token = current_user_ctx.set(current_user)
project_token = current_project_ctx.set(project_id)
try:
sse = get_project_sse(project_id)
await sse.handle_post_message(request.scope, request.receive, request._send)
except BrokenResourceError as e:
logger.info("Project MCP Server disconnected for project %s", project_id)
raise HTTPException(status_code=404, detail=f"Project MCP Server disconnected, error: {e}") from e
finally:
current_user_ctx.reset(user_token)
current_project_ctx.reset(project_token)
@router.post("/{project_id}/", dependencies=[Depends(get_current_user)])
async def handle_project_messages_with_slash(
project_id: UUID, request: Request, current_user: Annotated[User, Depends(get_current_active_user)]
):
"""Handle POST messages for a project-specific MCP server with trailing slash."""
# Call the original handler
return await handle_project_messages(project_id, request, current_user)
@router.patch("/{project_id}", status_code=200, dependencies=[Depends(get_current_user)])
async def update_project_mcp_settings(
project_id: UUID,
settings: list[MCPSettings],
current_user: Annotated[User, Depends(get_current_active_user)],
):
"""Update the MCP settings of all flows in a project."""
try:
db_service = get_db_service()
async with db_service.with_session() as session:
# Fetch the project first to verify it exists and belongs to the current user
project = (
await session.exec(
select(Folder)
.options(selectinload(Folder.flows))
.where(Folder.id == project_id, Folder.user_id == current_user.id)
)
).first()
if not project:
raise HTTPException(status_code=404, detail="Project not found")
# Query flows in the project
flows = (await session.exec(select(Flow).where(Flow.folder_id == project_id))).all()
flows_to_update = {x.id: x for x in settings}
updated_flows = []
for flow in flows:
if flow.user_id is None or flow.user_id != current_user.id:
continue
if flow.id in flows_to_update:
settings_to_update = flows_to_update[flow.id]
flow.mcp_enabled = settings_to_update.mcp_enabled
flow.action_name = settings_to_update.action_name
flow.action_description = settings_to_update.action_description
flow.updated_at = datetime.now(timezone.utc)
session.add(flow)
updated_flows.append(flow)
await session.commit()
return {"message": f"Updated MCP settings for {len(updated_flows)} flows"}
except Exception as e:
msg = f"Error updating project MCP settings: {e!s}"
logger.exception(msg)
raise HTTPException(status_code=500, detail=str(e)) from e

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src/backend/base/langflow/api/v1/projects.py Normal file
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import io
import json
import zipfile
from datetime import datetime, timezone
from typing import Annotated
from uuid import UUID
import orjson
from fastapi import APIRouter, Depends, File, HTTPException, Response, UploadFile, status
from fastapi.encoders import jsonable_encoder
from fastapi.responses import StreamingResponse
from fastapi_pagination import Params
from fastapi_pagination.ext.sqlmodel import paginate
from sqlalchemy import or_, update
from sqlalchemy.orm import selectinload
from sqlmodel import select
from langflow.api.utils import CurrentActiveUser, DbSession, cascade_delete_flow, custom_params, remove_api_keys
from langflow.api.v1.flows import create_flows
from langflow.api.v1.schemas import FlowListCreate
from langflow.helpers.flow import generate_unique_flow_name
from langflow.helpers.folders import generate_unique_folder_name
from langflow.initial_setup.constants import STARTER_FOLDER_NAME
from langflow.services.database.models.flow.model import Flow, FlowCreate, FlowRead
from langflow.services.database.models.folder.constants import DEFAULT_FOLDER_NAME
from langflow.services.database.models.folder.model import (
Folder,
FolderCreate,
FolderRead,
FolderReadWithFlows,
FolderUpdate,
)
from langflow.services.database.models.folder.pagination_model import FolderWithPaginatedFlows
router = APIRouter(prefix="/projects", tags=["Projects"])
@router.post("/", response_model=FolderRead, status_code=201)
async def create_project(
*,
session: DbSession,
project: FolderCreate,
current_user: CurrentActiveUser,
):
try:
new_project = Folder.model_validate(project, from_attributes=True)
new_project.user_id = current_user.id
# First check if the project.name is unique
# there might be flows with name like: "MyFlow", "MyFlow (1)", "MyFlow (2)"
# so we need to check if the name is unique with `like` operator
# if we find a flow with the same name, we add a number to the end of the name
# based on the highest number found
if (
await session.exec(
statement=select(Folder).where(Folder.name == new_project.name).where(Folder.user_id == current_user.id)
)
).first():
project_results = await session.exec(
select(Folder).where(
Folder.name.like(f"{new_project.name}%"), # type: ignore[attr-defined]
Folder.user_id == current_user.id,
)
)
if project_results:
project_names = [project.name for project in project_results]
project_numbers = [int(name.split("(")[-1].split(")")[0]) for name in project_names if "(" in name]
if project_numbers:
new_project.name = f"{new_project.name} ({max(project_numbers) + 1})"
else:
new_project.name = f"{new_project.name} (1)"
session.add(new_project)
await session.commit()
await session.refresh(new_project)
if project.components_list:
update_statement_components = (
update(Flow).where(Flow.id.in_(project.components_list)).values(folder_id=new_project.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_components)
await session.commit()
if project.flows_list:
update_statement_flows = (
update(Flow).where(Flow.id.in_(project.flows_list)).values(folder_id=new_project.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_flows)
await session.commit()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
return new_project
@router.get("/", response_model=list[FolderRead], status_code=200)
async def read_projects(
*,
session: DbSession,
current_user: CurrentActiveUser,
):
try:
projects = (
await session.exec(
select(Folder).where(
or_(Folder.user_id == current_user.id, Folder.user_id == None) # noqa: E711
)
)
).all()
projects = [project for project in projects if project.name != STARTER_FOLDER_NAME]
return sorted(projects, key=lambda x: x.name != DEFAULT_FOLDER_NAME)
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
@router.get("/{project_id}", response_model=FolderWithPaginatedFlows | FolderReadWithFlows, status_code=200)
async def read_project(
*,
session: DbSession,
project_id: UUID,
current_user: CurrentActiveUser,
params: Annotated[Params | None, Depends(custom_params)],
is_component: bool = False,
is_flow: bool = False,
search: str = "",
):
try:
project = (
await session.exec(
select(Folder)
.options(selectinload(Folder.flows))
.where(Folder.id == project_id, Folder.user_id == current_user.id)
)
).first()
except Exception as e:
if "No result found" in str(e):
raise HTTPException(status_code=404, detail="Project not found") from e
raise HTTPException(status_code=500, detail=str(e)) from e
if not project:
raise HTTPException(status_code=404, detail="Project not found")
try:
if params and params.page and params.size:
stmt = select(Flow).where(Flow.folder_id == project_id)
if Flow.updated_at is not None:
stmt = stmt.order_by(Flow.updated_at.desc()) # type: ignore[attr-defined]
if is_component:
stmt = stmt.where(Flow.is_component == True) # noqa: E712
if is_flow:
stmt = stmt.where(Flow.is_component == False) # noqa: E712
if search:
stmt = stmt.where(Flow.name.like(f"%{search}%")) # type: ignore[attr-defined]
paginated_flows = await paginate(session, stmt, params=params)
return FolderWithPaginatedFlows(folder=FolderRead.model_validate(project), flows=paginated_flows)
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
flows_from_current_user_in_project = [flow for flow in project.flows if flow.user_id == current_user.id]
project.flows = flows_from_current_user_in_project
return project
@router.patch("/{project_id}", response_model=FolderRead, status_code=200)
async def update_project(
*,
session: DbSession,
project_id: UUID,
project: FolderUpdate, # Assuming FolderUpdate is a Pydantic model defining updatable fields
current_user: CurrentActiveUser,
):
try:
existing_project = (
await session.exec(select(Folder).where(Folder.id == project_id, Folder.user_id == current_user.id))
).first()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
if not existing_project:
raise HTTPException(status_code=404, detail="Project not found")
try:
if project.name and project.name != existing_project.name:
existing_project.name = project.name
session.add(existing_project)
await session.commit()
await session.refresh(existing_project)
return existing_project
project_data = existing_project.model_dump(exclude_unset=True)
for key, value in project_data.items():
if key not in {"components", "flows"}:
setattr(existing_project, key, value)
session.add(existing_project)
await session.commit()
await session.refresh(existing_project)
concat_project_components = project.components + project.flows
flows_ids = (await session.exec(select(Flow.id).where(Flow.folder_id == existing_project.id))).all()
excluded_flows = list(set(flows_ids) - set(concat_project_components))
my_collection_project = (await session.exec(select(Folder).where(Folder.name == DEFAULT_FOLDER_NAME))).first()
if my_collection_project:
update_statement_my_collection = (
update(Flow).where(Flow.id.in_(excluded_flows)).values(folder_id=my_collection_project.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_my_collection)
await session.commit()
if concat_project_components:
update_statement_components = (
update(Flow).where(Flow.id.in_(concat_project_components)).values(folder_id=existing_project.id) # type: ignore[attr-defined]
)
await session.exec(update_statement_components)
await session.commit()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
return existing_project
@router.delete("/{project_id}", status_code=204)
async def delete_project(
*,
session: DbSession,
project_id: UUID,
current_user: CurrentActiveUser,
):
try:
flows = (
await session.exec(select(Flow).where(Flow.folder_id == project_id, Flow.user_id == current_user.id))
).all()
if len(flows) > 0:
for flow in flows:
await cascade_delete_flow(session, flow.id)
project = (
await session.exec(select(Folder).where(Folder.id == project_id, Folder.user_id == current_user.id))
).first()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
if not project:
raise HTTPException(status_code=404, detail="Project not found")
try:
await session.delete(project)
await session.commit()
return Response(status_code=status.HTTP_204_NO_CONTENT)
except Exception as e:
raise HTTPException(status_code=500, detail=str(e)) from e
@router.get("/download/{project_id}", status_code=200)
async def download_file(
*,
session: DbSession,
project_id: UUID,
current_user: CurrentActiveUser,
):
"""Download all flows from project as a zip file."""
try:
query = select(Folder).where(Folder.id == project_id, Folder.user_id == current_user.id)
result = await session.exec(query)
project = result.first()
if not project:
raise HTTPException(status_code=404, detail="Project not found")
flows_query = select(Flow).where(Flow.folder_id == project_id)
flows_result = await session.exec(flows_query)
flows = [FlowRead.model_validate(flow, from_attributes=True) for flow in flows_result.all()]
if not flows:
raise HTTPException(status_code=404, detail="No flows found in project")
flows_without_api_keys = [remove_api_keys(flow.model_dump()) for flow in flows]
zip_stream = io.BytesIO()
with zipfile.ZipFile(zip_stream, "w") as zip_file:
for flow in flows_without_api_keys:
flow_json = json.dumps(jsonable_encoder(flow))
zip_file.writestr(f"{flow['name']}.json", flow_json)
zip_stream.seek(0)
current_time = datetime.now(tz=timezone.utc).astimezone().strftime("%Y%m%d_%H%M%S")
filename = f"{current_time}_{project.name}_flows.zip"
return StreamingResponse(
zip_stream,
media_type="application/x-zip-compressed",
headers={"Content-Disposition": f"attachment; filename={filename}"},
)
except Exception as e:
if "No result found" in str(e):
raise HTTPException(status_code=404, detail="Project not found") from e
raise HTTPException(status_code=500, detail=str(e)) from e
@router.post("/upload/", response_model=list[FlowRead], status_code=201)
async def upload_file(
*,
session: DbSession,
file: Annotated[UploadFile, File(...)],
current_user: CurrentActiveUser,
):
"""Upload flows from a file."""
contents = await file.read()
data = orjson.loads(contents)
if not data:
raise HTTPException(status_code=400, detail="No flows found in the file")
project_name = await generate_unique_folder_name(data["folder_name"], current_user.id, session)
data["folder_name"] = project_name
project = FolderCreate(name=data["folder_name"], description=data["folder_description"])
new_project = Folder.model_validate(project, from_attributes=True)
new_project.id = None
new_project.user_id = current_user.id
session.add(new_project)
await session.commit()
await session.refresh(new_project)
del data["folder_name"]
del data["folder_description"]
if "flows" in data:
flow_list = FlowListCreate(flows=[FlowCreate(**flow) for flow in data["flows"]])
else:
raise HTTPException(status_code=400, detail="No flows found in the data")
# Now we set the user_id for all flows
for flow in flow_list.flows:
flow_name = await generate_unique_flow_name(flow.name, current_user.id, session)
flow.name = flow_name
flow.user_id = current_user.id
flow.folder_id = new_project.id
return await create_flows(session=session, flow_list=flow_list, current_user=current_user)

11
src/backend/base/langflow/api/v1/schemas.py
View file

@ -397,3 +397,14 @@ class CancelFlowResponse(BaseModel):
success: bool
message: str
class MCPSettings(BaseModel):
"""Model representing MCP settings for a flow."""
id: UUID
mcp_enabled: bool | None = None
action_name: str | None = None
action_description: str | None = None
name: str | None = None
description: str | None = None

2
src/backend/base/langflow/api/v1/users.py
View file

@ -37,7 +37,7 @@ async def add_user(
await session.refresh(new_user)
folder = await get_or_create_default_folder(session, new_user.id)
if not folder:
raise HTTPException(status_code=500, detail="Error creating default folder")
raise HTTPException(status_code=500, detail="Error creating default project")
except IntegrityError as e:
await session.rollback()
raise HTTPException(status_code=400, detail="This username is unavailable.") from e

7
src/backend/base/langflow/base/composio/composio_base.py
View file

@ -182,8 +182,13 @@ class ComposioBaseComponent(Component):
# Build the action maps before using them
self._build_action_maps()
# Update the action options
build_config["action"]["options"] = [
{"name": self.sanitize_action_name(action)} for action in self._actions_data
{
"name": self.sanitize_action_name(action),
"metaData": action,
}
for action in self._actions_data
]
try:

6
src/backend/base/langflow/base/mcp/util.py
View file

@ -64,13 +64,13 @@ def create_tool_func(tool_name: str, arg_schema: type[BaseModel], session) -> Ca
return tool_func
async def get_flow_snake_case(flow_name: str, user_id: str, session) -> Flow | None:
async def get_flow_snake_case(flow_name: str, user_id: str, session, is_action: bool | None = None) -> Flow | None:
uuid_user_id = UUID(user_id) if isinstance(user_id, str) else user_id
stmt = select(Flow).where(Flow.user_id == uuid_user_id).where(Flow.is_component == False) # noqa: E712
flows = (await session.exec(stmt)).all()
for flow in flows:
this_flow_name = "_".join(flow.name.lower().split())
this_flow_name = flow.action_name if is_action and flow.action_name else "_".join(flow.name.lower().split())
if this_flow_name == flow_name:
return flow
return None
@ -173,7 +173,7 @@ def create_input_schema_from_json_schema(schema: dict[str, Any]) -> type[BaseMod
model_cache[name] = model_cls
return model_cls
# build the top - level “InputSchema” from the root properties
# build the top - level "InputSchema" from the root properties
top_props = schema.get("properties", {})
top_reqs = set(schema.get("required", []))
top_fields: dict[str, Any] = {}

2
src/backend/base/langflow/components/tools/mcp_component.py
View file

@ -79,7 +79,7 @@ class MCPToolsComponent(Component):
display_name = "MCP Server"
description = "Connect to an MCP server and expose tools."
icon = "server"
icon = "Mcp"
name = "MCPTools"
inputs = [

6
src/backend/base/langflow/helpers/folders.py
View file

@ -7,7 +7,7 @@ async def generate_unique_folder_name(folder_name, user_id, session):
original_name = folder_name
n = 1
while True:
# Check if a folder with the given name exists
# Check if a project with the given name exists
existing_folder = (
await session.exec(
select(Folder).where(
@ -17,10 +17,10 @@ async def generate_unique_folder_name(folder_name, user_id, session):
)
).first()
# If no folder with the given name exists, return the name
# If no project with the given name exists, return the name
if not existing_folder:
return folder_name
# If a folder with the name already exists, append (n) to the name and increment n
# If a project with the name already exists, append (n) to the name and increment n
folder_name = f"{original_name} ({n})"
n += 1

9
src/backend/base/langflow/main.py
View file

@ -23,6 +23,7 @@ from pydantic_core import PydanticSerializationError
from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint
from langflow.api import health_check_router, log_router, router
from langflow.api.v1.mcp_projects import init_mcp_servers
from langflow.initial_setup.setup import (
create_or_update_starter_projects,
initialize_super_user_if_needed,
@ -156,7 +157,10 @@ def get_lifespan(*, fix_migration=False, version=None):
await create_or_update_starter_projects(all_types_dict)
logger.debug(f"Starter projects updated in {asyncio.get_event_loop().time() - current_time:.2f}s")
current_time = asyncio.get_event_loop().time()
logger.debug("Starting telemetry service")
telemetry_service.start()
logger.debug(f"started telemetry service in {asyncio.get_event_loop().time() - current_time:.2f}s")
current_time = asyncio.get_event_loop().time()
logger.debug("Loading flows")
@ -167,6 +171,11 @@ def get_lifespan(*, fix_migration=False, version=None):
queue_service.start()
logger.debug(f"Flows loaded in {asyncio.get_event_loop().time() - current_time:.2f}s")
current_time = asyncio.get_event_loop().time()
logger.debug("Loading mcp servers for projects")
await init_mcp_servers()
logger.debug(f"mcp servers loaded in {asyncio.get_event_loop().time() - current_time:.2f}s")
total_time = asyncio.get_event_loop().time() - start_time
logger.debug(f"Total initialization time: {total_time:.2f}s")
yield

11
src/backend/base/langflow/services/database/models/__init__.py
View file

@ -7,4 +7,13 @@ from .transactions import TransactionTable
from .user import User
from .variable import Variable
__all__ = ["ApiKey", "File", "Flow", "Folder", "MessageTable", "TransactionTable", "User", "Variable"]
__all__ = [
"ApiKey",
"File",
"Flow",
"Folder",
"MessageTable",
"TransactionTable",
"User",
"Variable",
]

16
src/backend/base/langflow/services/database/models/flow/model.py
View file

@ -47,6 +47,15 @@ class FlowBase(SQLModel):
endpoint_name: str | None = Field(default=None, nullable=True, index=True)
tags: list[str] | None = None
locked: bool | None = Field(default=False, nullable=True)
mcp_enabled: bool | None = Field(default=False, nullable=True, description="Can be exposed in the MCP server")
action_name: str | None = Field(
default=None, nullable=True, description="The name of the action associated with the flow"
)
action_description: str | None = Field(
default=None,
sa_column=Column(Text, nullable=True),
description="The description of the action associated with the flow",
)
access_type: AccessTypeEnum = Field(
default=AccessTypeEnum.PRIVATE,
sa_column=Column(
@ -233,6 +242,9 @@ class FlowHeader(BaseModel):
data: dict | None = Field(None, description="The data of the component, if is_component is True")
access_type: AccessTypeEnum | None = Field(None, description="The access type of the flow")
tags: list[str] | None = Field(None, description="The tags of the flow")
mcp_enabled: bool | None = Field(None, description="Flag indicating whether the flow is exposed in the MCP server")
action_name: str | None = Field(None, description="The name of the action associated with the flow")
action_description: str | None = Field(None, description="The description of the action associated with the flow")
@field_validator("data", mode="before")
@classmethod
@ -248,7 +260,9 @@ class FlowUpdate(SQLModel):
data: dict | None = None
folder_id: UUID | None = None
endpoint_name: str | None = None
locked: bool | None = None
mcp_enabled: bool | None = None
action_name: str | None = None
action_description: str | None = None
access_type: AccessTypeEnum | None = None
fs_path: str | None = None

2
src/backend/base/langflow/services/database/models/folder/constants.py
View file

@ -1,2 +1,2 @@
DEFAULT_FOLDER_DESCRIPTION = "Manage your own projects. Download and upload folders."
DEFAULT_FOLDER_DESCRIPTION = "Manage your own flows. Download and upload projects."
DEFAULT_FOLDER_NAME = "My Projects"

3
src/backend/base/langflow/utils/component_utils.py
View file

@ -15,8 +15,7 @@ def update_fields(build_config: dotdict, fields: dict[str, Any]) -> dotdict:
def add_fields(build_config: dotdict, fields: dict[str, Any]) -> dotdict:
"""Add new fields to build_config."""
for key, value in fields.items():
build_config[key] = value
build_config.update(fields)
return build_config

2
src/backend/base/pyproject.toml
View file

@ -78,7 +78,7 @@ dependencies = [
"validators>=0.34.0",
"networkx>=3.4.2",
"json-repair>=0.30.3",
"mcp>=1.1.2",
"mcp>=1.6.0",
"aiosqlite>=0.20.0",
"greenlet>=3.1.1",
"jsonquerylang>=1.1.1",

52
src/backend/tests/unit/api/v1/test_folders.py
View file

@ -6,7 +6,7 @@ from httpx import AsyncClient
@pytest.fixture
def basic_case():
return {
"name": "New Folder",
"name": "New Project",
"description": "",
"flows_list": [],
"components_list": [],
@ -14,9 +14,13 @@ def basic_case():
async def test_create_folder(client: AsyncClient, logged_in_headers, basic_case):
# Configure client to follow redirects
client.follow_redirects = True
response = await client.post("api/v1/folders/", json=basic_case, headers=logged_in_headers)
result = response.json()
# Check that we're getting a valid response from the projects endpoint
assert response.status_code == status.HTTP_201_CREATED
assert isinstance(result, dict), "The result must be a dictionary"
assert "name" in result, "The dictionary must contain a key called 'name'"
@ -26,6 +30,9 @@ async def test_create_folder(client: AsyncClient, logged_in_headers, basic_case)
async def test_read_folders(client: AsyncClient, logged_in_headers):
# Configure client to follow redirects
client.follow_redirects = True
response = await client.get("api/v1/folders/", headers=logged_in_headers)
result = response.json()
@ -35,24 +42,55 @@ async def test_read_folders(client: AsyncClient, logged_in_headers):
async def test_read_folder(client: AsyncClient, logged_in_headers, basic_case):
# Configure client to follow redirects
client.follow_redirects = True
# Create a folder first
response_ = await client.post("api/v1/folders/", json=basic_case, headers=logged_in_headers)
id_ = response_.json()["id"]
# Get the folder
response = await client.get(f"api/v1/folders/{id_}", headers=logged_in_headers)
result = response.json()
assert response.status_code == status.HTTP_200_OK
assert isinstance(result, dict), "The result must be a dictionary"
assert "name" in result, "The dictionary must contain a key called 'name'"
assert "description" in result, "The dictionary must contain a key called 'description'"
assert "id" in result, "The dictionary must contain a key called 'id'"
assert "parent_id" in result, "The dictionary must contain a key called 'parent_id'"
# The response structure may be different depending on whether pagination is enabled
if "folder" in result:
# Handle paginated project response
folder_data = result["folder"]
assert response.status_code == status.HTTP_200_OK
assert isinstance(folder_data, dict), "The folder data must be a dictionary"
assert "name" in folder_data, "The dictionary must contain a key called 'name'"
assert "description" in folder_data, "The dictionary must contain a key called 'description'"
assert "id" in folder_data, "The dictionary must contain a key called 'id'"
elif "project" in result:
# Handle paginated project response
project_data = result["project"]
assert response.status_code == status.HTTP_200_OK
assert isinstance(project_data, dict), "The project data must be a dictionary"
assert "name" in project_data, "The dictionary must contain a key called 'name'"
assert "description" in project_data, "The dictionary must contain a key called 'description'"
assert "id" in project_data, "The dictionary must contain a key called 'id'"
else:
# Handle direct project response
assert response.status_code == status.HTTP_200_OK
assert isinstance(result, dict), "The result must be a dictionary"
assert "name" in result, "The dictionary must contain a key called 'name'"
assert "description" in result, "The dictionary must contain a key called 'description'"
assert "id" in result, "The dictionary must contain a key called 'id'"
async def test_update_folder(client: AsyncClient, logged_in_headers, basic_case):
# Configure client to follow redirects
client.follow_redirects = True
update_case = basic_case.copy()
update_case["name"] = "Updated Folder"
# Create a folder first
response_ = await client.post("api/v1/folders/", json=basic_case, headers=logged_in_headers)
id_ = response_.json()["id"]
# Update the folder
response = await client.patch(f"api/v1/folders/{id_}", json=update_case, headers=logged_in_headers)
result = response.json()

113
src/backend/tests/unit/api/v1/test_mcp.py Normal file
View file

@ -0,0 +1,113 @@
from unittest.mock import AsyncMock, MagicMock, patch
from uuid import uuid4
import pytest
from fastapi import status
from httpx import AsyncClient
from langflow.services.auth.utils import get_password_hash
from langflow.services.database.models.user import User
# Mark all tests in this module as asyncio
pytestmark = pytest.mark.asyncio
@pytest.fixture
def mock_user():
return User(
id=uuid4(), username="testuser", password=get_password_hash("testpassword"), is_active=True, is_superuser=False
)
@pytest.fixture
def mock_mcp_server():
with patch("langflow.api.v1.mcp.server") as mock:
# Basic mocking for server attributes potentially accessed during endpoint calls
mock.request_context = MagicMock()
mock.request_context.meta = MagicMock()
mock.request_context.meta.progressToken = "test_token"
mock.request_context.session = AsyncMock()
mock.create_initialization_options = MagicMock()
mock.run = AsyncMock()
yield mock
@pytest.fixture
def mock_sse_transport():
with patch("langflow.api.v1.mcp.sse") as mock:
mock.connect_sse = AsyncMock()
mock.handle_post_message = AsyncMock()
yield mock
# Fixture to mock the current user context variable needed for auth in /sse GET
@pytest.fixture(autouse=True)
def mock_current_user_ctx(mock_user):
with patch("langflow.api.v1.mcp.current_user_ctx") as mock:
mock.get.return_value = mock_user
mock.set = MagicMock(return_value="dummy_token") # Return a dummy token for reset
mock.reset = MagicMock()
yield mock
# Test the HEAD /sse endpoint (checks server availability)
async def test_mcp_sse_head_endpoint(client: AsyncClient):
"""Test HEAD /sse endpoint returns 200 OK."""
response = await client.head("api/v1/mcp/sse")
assert response.status_code == status.HTTP_200_OK
# Test the HEAD /sse endpoint without authentication
async def test_mcp_sse_head_endpoint_no_auth(client: AsyncClient):
"""Test HEAD /sse endpoint without authentication returns 200 OK (HEAD requests don't require auth)."""
response = await client.head("api/v1/mcp/sse")
assert response.status_code == status.HTTP_200_OK
async def test_mcp_sse_get_endpoint_invalid_auth(client: AsyncClient):
"""Test GET /sse endpoint with invalid authentication returns 401."""
headers = {"Authorization": "Bearer invalid_token"}
response = await client.get("api/v1/mcp/sse", headers=headers)
assert response.status_code == status.HTTP_401_UNAUTHORIZED
# Test the POST / endpoint (handles incoming MCP messages)
async def test_mcp_post_endpoint_success(client: AsyncClient, logged_in_headers, mock_sse_transport):
"""Test POST / endpoint successfully handles MCP messages."""
test_message = {"type": "test", "content": "message"}
response = await client.post("api/v1/mcp/", headers=logged_in_headers, json=test_message)
assert response.status_code == status.HTTP_200_OK
mock_sse_transport.handle_post_message.assert_called_once()
async def test_mcp_post_endpoint_no_auth(client: AsyncClient):
"""Test POST / endpoint without authentication returns 400 (current behavior)."""
response = await client.post("api/v1/mcp/", json={})
assert response.status_code == status.HTTP_400_BAD_REQUEST
async def test_mcp_post_endpoint_invalid_json(client: AsyncClient, logged_in_headers):
"""Test POST / endpoint with invalid JSON returns 400."""
response = await client.post("api/v1/mcp/", headers=logged_in_headers, content="invalid json")
assert response.status_code == status.HTTP_400_BAD_REQUEST
async def test_mcp_post_endpoint_disconnect_error(client: AsyncClient, logged_in_headers, mock_sse_transport):
"""Test POST / endpoint handles disconnection errors correctly."""
mock_sse_transport.handle_post_message.side_effect = BrokenPipeError("Simulated disconnect")
response = await client.post("api/v1/mcp/", headers=logged_in_headers, json={"type": "test"})
assert response.status_code == status.HTTP_404_NOT_FOUND
assert "MCP Server disconnected" in response.json()["detail"]
mock_sse_transport.handle_post_message.assert_called_once()
async def test_mcp_post_endpoint_server_error(client: AsyncClient, logged_in_headers, mock_sse_transport):
"""Test POST / endpoint handles server errors correctly."""
mock_sse_transport.handle_post_message.side_effect = Exception("Internal server error")
response = await client.post("api/v1/mcp/", headers=logged_in_headers, json={"type": "test"})
assert response.status_code == status.HTTP_500_INTERNAL_SERVER_ERROR
assert "Internal server error" in response.json()["detail"]

509
src/backend/tests/unit/api/v1/test_mcp_projects.py Normal file
View file

@ -0,0 +1,509 @@
from unittest.mock import AsyncMock, MagicMock, patch
from uuid import uuid4
import pytest
from fastapi import status
from httpx import AsyncClient
from langflow.api.v1.mcp_projects import (
get_project_mcp_server,
get_project_sse,
init_mcp_servers,
project_mcp_servers,
project_sse_transports,
)
from langflow.services.auth.utils import get_password_hash
from langflow.services.database.models.flow import Flow
from langflow.services.database.models.folder import Folder
from langflow.services.database.models.user import User
from langflow.services.database.utils import session_getter
from langflow.services.deps import get_db_service
from mcp.server.sse import SseServerTransport
# Mark all tests in this module as asyncio
pytestmark = pytest.mark.asyncio
@pytest.fixture
def mock_project(active_user):
"""Fixture to provide a mock project linked to the active user."""
return Folder(id=uuid4(), name="Test Project", user_id=active_user.id)
@pytest.fixture
def mock_flow(active_user, mock_project):
"""Fixture to provide a mock flow linked to the active user and project."""
return Flow(
id=uuid4(),
name="Test Flow",
description="Test Description",
mcp_enabled=True,
action_name="test_action",
action_description="Test Action Description",
folder_id=mock_project.id,
user_id=active_user.id,
)
@pytest.fixture
def mock_project_mcp_server():
with patch("langflow.api.v1.mcp_projects.ProjectMCPServer") as mock:
server_instance = MagicMock()
server_instance.server = MagicMock()
server_instance.server.name = "test-server"
server_instance.server.run = AsyncMock()
server_instance.server.create_initialization_options = MagicMock()
mock.return_value = server_instance
yield server_instance
class AsyncContextManagerMock:
"""Mock class that implements async context manager protocol."""
async def __aenter__(self):
return (MagicMock(), MagicMock())
async def __aexit__(self, exc_type, exc_val, exc_tb):
pass
@pytest.fixture
def mock_sse_transport():
with patch("langflow.api.v1.mcp_projects.SseServerTransport") as mock:
transport_instance = MagicMock()
# Create an async context manager for connect_sse
connect_sse_mock = AsyncContextManagerMock()
transport_instance.connect_sse = MagicMock(return_value=connect_sse_mock)
transport_instance.handle_post_message = AsyncMock()
mock.return_value = transport_instance
yield transport_instance
@pytest.fixture(autouse=True)
def mock_current_user_ctx(active_user):
with patch("langflow.api.v1.mcp_projects.current_user_ctx") as mock:
mock.get.return_value = active_user
mock.set = MagicMock(return_value="dummy_token")
mock.reset = MagicMock()
yield mock
@pytest.fixture(autouse=True)
def mock_current_project_ctx(mock_project):
with patch("langflow.api.v1.mcp_projects.current_project_ctx") as mock:
mock.get.return_value = mock_project.id
mock.set = MagicMock(return_value="dummy_token")
mock.reset = MagicMock()
yield mock
@pytest.fixture
async def other_test_user():
"""Fixture for creating another test user."""
user_id = uuid4()
db_manager = get_db_service()
async with db_manager.with_session() as session:
user = User(
id=user_id,
username="other_test_user",
password=get_password_hash("testpassword"),
is_active=True,
is_superuser=False,
)
session.add(user)
await session.commit()
await session.refresh(user)
yield user
# Clean up
async with db_manager.with_session() as session:
user = await session.get(User, user_id)
if user:
await session.delete(user)
await session.commit()
@pytest.fixture
async def other_test_project(other_test_user):
"""Fixture for creating a project for another test user."""
project_id = uuid4()
db_manager = get_db_service()
async with db_manager.with_session() as session:
project = Folder(id=project_id, name="Other Test Project", user_id=other_test_user.id)
session.add(project)
await session.commit()
await session.refresh(project)
yield project
# Clean up
async with db_manager.with_session() as session:
project = await session.get(Folder, project_id)
if project:
await session.delete(project)
await session.commit()
async def test_handle_project_messages_success(
client: AsyncClient, mock_project, mock_sse_transport, logged_in_headers
):
"""Test successful handling of project messages."""
with patch("langflow.api.v1.mcp_projects.get_db_service") as mock_db:
mock_session = AsyncMock()
mock_db.return_value.with_session.return_value.__aenter__.return_value = mock_session
mock_session.exec.return_value.first.return_value = mock_project
response = await client.post(
f"api/v1/mcp/project/{mock_project.id}",
headers=logged_in_headers,
json={"type": "test", "content": "message"},
)
assert response.status_code == status.HTTP_200_OK
mock_sse_transport.handle_post_message.assert_called_once()
async def test_update_project_mcp_settings_invalid_json(client: AsyncClient, mock_project, logged_in_headers):
"""Test updating MCP settings with invalid JSON."""
with patch("langflow.api.v1.mcp_projects.get_db_service") as mock_db:
mock_session = AsyncMock()
mock_db.return_value.with_session.return_value.__aenter__.return_value = mock_session
mock_session.exec.return_value.first.return_value = mock_project
response = await client.patch(
f"api/v1/mcp/project/{mock_project.id}", headers=logged_in_headers, json="invalid"
)
assert response.status_code == status.HTTP_422_UNPROCESSABLE_ENTITY
@pytest.fixture
async def test_flow_for_update(active_user, user_test_project):
"""Fixture to provide a real flow for testing MCP settings updates."""
flow_id = uuid4()
flow_data = {
"id": flow_id,
"name": "Test Flow For Update",
"description": "Test flow that will be updated",
"mcp_enabled": True,
"action_name": "original_action",
"action_description": "Original description",
"folder_id": user_test_project.id,
"user_id": active_user.id,
}
# Create the flow in the database
db_manager = get_db_service()
async with db_manager.with_session() as session:
flow = Flow(**flow_data)
session.add(flow)
await session.commit()
await session.refresh(flow)
yield flow
# Clean up
async with db_manager.with_session() as session:
flow = await session.get(Flow, flow_id)
if flow:
await session.delete(flow)
await session.commit()
async def test_update_project_mcp_settings_success(
client: AsyncClient, user_test_project, test_flow_for_update, logged_in_headers
):
"""Test successful update of MCP settings using real database."""
# Create settings for updating the flow
settings = [
{
"id": str(test_flow_for_update.id),
"action_name": "updated_action",
"action_description": "Updated description",
"mcp_enabled": False,
"name": test_flow_for_update.name,
"description": test_flow_for_update.description,
}
]
# Make the real PATCH request
response = await client.patch(
f"api/v1/mcp/project/{user_test_project.id}", headers=logged_in_headers, json=settings
)
# Assert response
assert response.status_code == 200
assert "Updated MCP settings for 1 flows" in response.json()["message"]
# Verify the flow was actually updated in the database
async with session_getter(get_db_service()) as session:
updated_flow = await session.get(Flow, test_flow_for_update.id)
assert updated_flow is not None
assert updated_flow.action_name == "updated_action"
assert updated_flow.action_description == "Updated description"
assert updated_flow.mcp_enabled is False
async def test_update_project_mcp_settings_invalid_project(client: AsyncClient, logged_in_headers):
"""Test accessing an invalid project ID."""
# We're using the GET endpoint since it works correctly and tests the same security constraints
# Generate a random UUID that doesn't exist in the database
nonexistent_project_id = uuid4()
# Try to access the project
response = await client.get(f"api/v1/mcp/project/{nonexistent_project_id}/sse", headers=logged_in_headers)
# Verify the response
assert response.status_code == 404
assert response.json()["detail"] == "Project not found"
async def test_update_project_mcp_settings_other_user_project(
client: AsyncClient, other_test_project, logged_in_headers
):
"""Test accessing a project belonging to another user."""
# We're using the GET endpoint since it works correctly and tests the same security constraints
# Try to access the other user's project using active_user's credentials
response = await client.get(f"api/v1/mcp/project/{other_test_project.id}/sse", headers=logged_in_headers)
# Verify the response
assert response.status_code == 404
assert response.json()["detail"] == "Project not found"
async def test_update_project_mcp_settings_empty_settings(client: AsyncClient, user_test_project, logged_in_headers):
"""Test updating MCP settings with empty settings list."""
# Use real database objects instead of mocks to avoid the coroutine issue
# Empty settings list
settings = []
# Make the request to the actual endpoint
response = await client.patch(
f"api/v1/mcp/project/{user_test_project.id}", headers=logged_in_headers, json=settings
)
# Verify response - the real endpoint should handle empty settings correctly
assert response.status_code == 200
assert "Updated MCP settings for 0 flows" in response.json()["message"]
async def test_user_can_only_access_own_projects(client: AsyncClient, other_test_project, logged_in_headers):
"""Test that a user can only access their own projects."""
# Try to access the other user's project using first user's credentials
response = await client.get(f"api/v1/mcp/project/{other_test_project.id}/sse", headers=logged_in_headers)
# Should fail with 404 as first user cannot see second user's project
assert response.status_code == 404
assert response.json()["detail"] == "Project not found"
async def test_user_data_isolation_with_real_db(
client: AsyncClient, logged_in_headers, other_test_user, other_test_project
):
"""Test that users can only access their own MCP projects using a real database session."""
# Create a flow for the other test user in their project
second_flow_id = uuid4()
# Use real database session just for flow creation and cleanup
async with session_getter(get_db_service()) as session:
# Create a flow in the other user's project
second_flow = Flow(
id=second_flow_id,
name="Second User Flow",
description="This flow belongs to the second user",
mcp_enabled=True,
action_name="second_user_action",
action_description="Second user action description",
folder_id=other_test_project.id,
user_id=other_test_user.id,
)
# Add flow to database
session.add(second_flow)
await session.commit()
try:
# Test that first user can't see the project
response = await client.get(f"api/v1/mcp/project/{other_test_project.id}/sse", headers=logged_in_headers)
# Should fail with 404
assert response.status_code == 404
assert response.json()["detail"] == "Project not found"
# First user attempts to update second user's flow settings
# Note: We're not testing the PATCH endpoint because it has the coroutine error
# Instead, verify permissions via the GET endpoint
finally:
# Clean up flow
async with session_getter(get_db_service()) as session:
second_flow = await session.get(Flow, second_flow_id)
if second_flow:
await session.delete(second_flow)
await session.commit()
@pytest.fixture
async def user_test_project(active_user):
"""Fixture for creating a project for the active user."""
project_id = uuid4()
db_manager = get_db_service()
async with db_manager.with_session() as session:
project = Folder(id=project_id, name="User Test Project", user_id=active_user.id)
session.add(project)
await session.commit()
await session.refresh(project)
yield project
# Clean up
async with db_manager.with_session() as session:
project = await session.get(Folder, project_id)
if project:
await session.delete(project)
await session.commit()
@pytest.fixture
async def user_test_flow(active_user, user_test_project):
"""Fixture for creating a flow for the active user."""
flow_id = uuid4()
db_manager = get_db_service()
async with db_manager.with_session() as session:
flow = Flow(
id=flow_id,
name="User Test Flow",
description="This flow belongs to the active user",
mcp_enabled=True,
action_name="user_action",
action_description="User action description",
folder_id=user_test_project.id,
user_id=active_user.id,
)
session.add(flow)
await session.commit()
await session.refresh(flow)
yield flow
# Clean up
async with db_manager.with_session() as session:
flow = await session.get(Flow, flow_id)
if flow:
await session.delete(flow)
await session.commit()
async def test_user_can_update_own_flow_mcp_settings(
client: AsyncClient, logged_in_headers, user_test_project, user_test_flow
):
"""Test that a user can update MCP settings for their own flows using real database."""
# User attempts to update their own flow settings
updated_settings = [
{
"id": str(user_test_flow.id),
"action_name": "updated_user_action",
"action_description": "Updated user action description",
"mcp_enabled": False,
"name": "User Test Flow",
"description": "This flow belongs to the active user",
}
]
# Make the PATCH request to update settings
response = await client.patch(
f"api/v1/mcp/project/{user_test_project.id}", headers=logged_in_headers, json=updated_settings
)
# Should succeed as the user owns this project and flow
assert response.status_code == 200
assert "Updated MCP settings for 1 flows" in response.json()["message"]
# Verify the flow was actually updated in the database
async with session_getter(get_db_service()) as session:
updated_flow = await session.get(Flow, user_test_flow.id)
assert updated_flow is not None
assert updated_flow.action_name == "updated_user_action"
assert updated_flow.action_description == "Updated user action description"
assert updated_flow.mcp_enabled is False
async def test_project_sse_creation(user_test_project):
"""Test that SSE transport and MCP server are correctly created for a project."""
# Test getting an SSE transport for the first time
project_id = user_test_project.id
project_id_str = str(project_id)
# Ensure there's no SSE transport for this project yet
if project_id_str in project_sse_transports:
del project_sse_transports[project_id_str]
# Get an SSE transport
sse_transport = get_project_sse(project_id)
# Verify the transport was created correctly
assert project_id_str in project_sse_transports
assert sse_transport is project_sse_transports[project_id_str]
assert isinstance(sse_transport, SseServerTransport)
# Test getting an MCP server for the first time
if project_id_str in project_mcp_servers:
del project_mcp_servers[project_id_str]
# Get an MCP server
mcp_server = get_project_mcp_server(project_id)
# Verify the server was created correctly
assert project_id_str in project_mcp_servers
assert mcp_server is project_mcp_servers[project_id_str]
assert mcp_server.project_id == project_id
assert mcp_server.server.name == f"langflow-mcp-project-{project_id}"
# Test that getting the same SSE transport and MCP server again returns the cached instances
sse_transport2 = get_project_sse(project_id)
mcp_server2 = get_project_mcp_server(project_id)
assert sse_transport2 is sse_transport
assert mcp_server2 is mcp_server
async def test_init_mcp_servers(user_test_project, other_test_project):
"""Test the initialization of MCP servers for all projects."""
# Clear existing caches
project_sse_transports.clear()
project_mcp_servers.clear()
# Test the initialization function
await init_mcp_servers()
# Verify that both test projects have SSE transports and MCP servers initialized
project1_id = str(user_test_project.id)
project2_id = str(other_test_project.id)
# Both projects should have SSE transports created
assert project1_id in project_sse_transports
assert project2_id in project_sse_transports
# Both projects should have MCP servers created
assert project1_id in project_mcp_servers
assert project2_id in project_mcp_servers
# Verify the correct configuration
assert isinstance(project_sse_transports[project1_id], SseServerTransport)
assert isinstance(project_sse_transports[project2_id], SseServerTransport)
assert project_mcp_servers[project1_id].project_id == user_test_project.id
assert project_mcp_servers[project2_id].project_id == other_test_project.id
async def test_init_mcp_servers_error_handling():
"""Test that init_mcp_servers handles errors correctly and continues initialization."""
# Clear existing caches
project_sse_transports.clear()
project_mcp_servers.clear()
# Create a mock to simulate an error when initializing one project
original_get_project_sse = get_project_sse
def mock_get_project_sse(project_id):
# Raise an exception for the first project only
if not project_sse_transports: # Only for the first project
msg = "Test error for project SSE creation"
raise ValueError(msg)
return original_get_project_sse(project_id)
# Apply the patch
with patch("langflow.api.v1.mcp_projects.get_project_sse", side_effect=mock_get_project_sse):
# This should not raise any exception, as the error should be caught
await init_mcp_servers()

89
src/backend/tests/unit/api/v1/test_projects.py Normal file
View file

@ -0,0 +1,89 @@
import pytest
from fastapi import status
from httpx import AsyncClient
@pytest.fixture
def basic_case():
return {
"name": "New Project",
"description": "",
"flows_list": [],
"components_list": [],
}
async def test_create_project(client: AsyncClient, logged_in_headers, basic_case):
response = await client.post("api/v1/projects/", json=basic_case, headers=logged_in_headers)
result = response.json()
assert response.status_code == status.HTTP_201_CREATED
assert isinstance(result, dict), "The result must be a dictionary"
assert "name" in result, "The dictionary must contain a key called 'name'"
assert "description" in result, "The dictionary must contain a key called 'description'"
assert "id" in result, "The dictionary must contain a key called 'id'"
assert "parent_id" in result, "The dictionary must contain a key called 'parent_id'"
async def test_read_projects(client: AsyncClient, logged_in_headers):
response = await client.get("api/v1/projects/", headers=logged_in_headers)
result = response.json()
assert response.status_code == status.HTTP_200_OK
assert isinstance(result, list), "The result must be a list"
assert len(result) > 0, "The list must not be empty"
async def test_read_project(client: AsyncClient, logged_in_headers, basic_case):
# Create a project first
response_ = await client.post("api/v1/projects/", json=basic_case, headers=logged_in_headers)
id_ = response_.json()["id"]
# Get the project
response = await client.get(f"api/v1/projects/{id_}", headers=logged_in_headers)
result = response.json()
# The response structure may be different depending on whether pagination is enabled
if isinstance(result, dict) and "folder" in result:
# Handle paginated project response
folder_data = result["folder"]
assert response.status_code == status.HTTP_200_OK
assert isinstance(folder_data, dict), "The folder data must be a dictionary"
assert "name" in folder_data, "The dictionary must contain a key called 'name'"
assert "description" in folder_data, "The dictionary must contain a key called 'description'"
assert "id" in folder_data, "The dictionary must contain a key called 'id'"
elif isinstance(result, dict) and "project" in result:
# Handle paginated project response
project_data = result["project"]
assert response.status_code == status.HTTP_200_OK
assert isinstance(project_data, dict), "The project data must be a dictionary"
assert "name" in project_data, "The dictionary must contain a key called 'name'"
assert "description" in project_data, "The dictionary must contain a key called 'description'"
assert "id" in project_data, "The dictionary must contain a key called 'id'"
else:
# Handle direct project response
assert response.status_code == status.HTTP_200_OK
assert isinstance(result, dict), "The result must be a dictionary"
assert "name" in result, "The dictionary must contain a key called 'name'"
assert "description" in result, "The dictionary must contain a key called 'description'"
assert "id" in result, "The dictionary must contain a key called 'id'"
async def test_update_project(client: AsyncClient, logged_in_headers, basic_case):
update_case = basic_case.copy()
update_case["name"] = "Updated Project"
# Create a project first
response_ = await client.post("api/v1/projects/", json=basic_case, headers=logged_in_headers)
id_ = response_.json()["id"]
# Update the project
response = await client.patch(f"api/v1/projects/{id_}", json=update_case, headers=logged_in_headers)
result = response.json()
assert response.status_code == status.HTTP_200_OK
assert isinstance(result, dict), "The result must be a dictionary"
assert "name" in result, "The dictionary must contain a key called 'name'"
assert "description" in result, "The dictionary must contain a key called 'description'"
assert "id" in result, "The dictionary must contain a key called 'id'"
assert "parent_id" in result, "The dictionary must contain a key called 'parent_id'"

14
src/backend/tests/unit/initial_setup/test_setup_functions.py
View file

@ -8,23 +8,23 @@ from langflow.services.database.models.folder.model import FolderRead
@pytest.mark.usefixtures("client")
async def test_get_or_create_default_folder_creation() -> None:
"""Test that a default folder is created for a new user.
"""Test that a default project is created for a new user.
This test verifies that when no default folder exists for a given user,
This test verifies that when no default project exists for a given user,
get_or_create_default_folder creates one with the expected name and assigns it an ID.
"""
test_user_id = uuid4()
async with session_scope() as session:
folder = await get_or_create_default_folder(session, test_user_id)
assert folder.name == DEFAULT_FOLDER_NAME, "The folder name should match the default."
assert hasattr(folder, "id"), "The folder should have an 'id' attribute after creation."
assert folder.name == DEFAULT_FOLDER_NAME, "The project name should match the default."
assert hasattr(folder, "id"), "The project should have an 'id' attribute after creation."
@pytest.mark.usefixtures("client")
async def test_get_or_create_default_folder_idempotency() -> None:
"""Test that subsequent calls to get_or_create_default_folder return the same folder.
"""Test that subsequent calls to get_or_create_default_folder return the same project.
The function should be idempotent such that if a default folder already exists,
The function should be idempotent such that if a default project already exists,
calling the function again does not create a new one.
"""
test_user_id = uuid4()
@ -39,7 +39,7 @@ async def test_get_or_create_default_folder_concurrent_calls() -> None:
"""Test concurrent invocations of get_or_create_default_folder.
This test ensures that when multiple concurrent calls are made for the same user,
only one default folder is created, demonstrating idempotency under concurrent access.
only one default project is created, demonstrating idempotency under concurrent access.
"""
test_user_id = uuid4()

110
src/backend/tests/unit/test_database.py
View file

@ -341,11 +341,11 @@ async def test_delete_flows_with_transaction_and_build(client: AsyncClient, logg
@pytest.mark.usefixtures("active_user")
async def test_delete_folder_with_flows_with_transaction_and_build(client: AsyncClient, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description", components_list=[], flows_list=[])
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description", components_list=[], flows_list=[])
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201, f"Expected status code 201, but got {response.status_code}"
created_folder = response.json()
@ -393,7 +393,7 @@ async def test_delete_folder_with_flows_with_transaction_and_build(client: Async
artifacts=build.get("artifacts"),
)
response = await client.request("DELETE", f"api/v1/folders/{folder_id}", headers=logged_in_headers)
response = await client.request("DELETE", f"api/v1/projects/{folder_id}", headers=logged_in_headers)
assert response.status_code == 204
for flow_id in flow_ids:
@ -413,22 +413,22 @@ async def test_delete_folder_with_flows_with_transaction_and_build(client: Async
async def test_get_flows_from_folder_pagination(client: AsyncClient, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description", components_list=[], flows_list=[])
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description", components_list=[], flows_list=[])
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201, f"Expected status code 201, but got {response.status_code}"
created_folder = response.json()
folder_id = created_folder["id"]
response = await client.get(
f"api/v1/folders/{folder_id}", headers=logged_in_headers, params={"page": 1, "size": 50}
f"api/v1/projects/{folder_id}", headers=logged_in_headers, params={"page": 1, "size": 50}
)
assert response.status_code == 200
assert response.json()["folder"]["name"] == folder_name
assert response.json()["folder"]["description"] == "Test folder description"
assert response.json()["folder"]["description"] == "Test project description"
assert response.json()["flows"]["page"] == 1
assert response.json()["flows"]["size"] == 50
assert response.json()["flows"]["pages"] == 0
@ -437,22 +437,22 @@ async def test_get_flows_from_folder_pagination(client: AsyncClient, logged_in_h
async def test_get_flows_from_folder_pagination_with_params(client: AsyncClient, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description", components_list=[], flows_list=[])
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description", components_list=[], flows_list=[])
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201, f"Expected status code 201, but got {response.status_code}"
created_folder = response.json()
folder_id = created_folder["id"]
response = await client.get(
f"api/v1/folders/{folder_id}", headers=logged_in_headers, params={"page": 3, "size": 10}
f"api/v1/projects/{folder_id}", headers=logged_in_headers, params={"page": 3, "size": 10}
)
assert response.status_code == 200
assert response.json()["folder"]["name"] == folder_name
assert response.json()["folder"]["description"] == "Test folder description"
assert response.json()["folder"]["description"] == "Test project description"
assert response.json()["flows"]["page"] == 3
assert response.json()["flows"]["size"] == 10
assert response.json()["flows"]["pages"] == 0
@ -629,37 +629,37 @@ async def test_sqlite_pragmas():
@pytest.mark.usefixtures("active_user")
async def test_read_folder(client: AsyncClient, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description")
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description")
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201
created_folder = response.json()
folder_id = created_folder["id"]
# Read the folder
response = await client.get(f"api/v1/folders/{folder_id}", headers=logged_in_headers)
# Read the project
response = await client.get(f"api/v1/projects/{folder_id}", headers=logged_in_headers)
assert response.status_code == 200
folder_data = response.json()
assert folder_data["name"] == folder_name
assert folder_data["description"] == "Test folder description"
assert folder_data["description"] == "Test project description"
assert "flows" in folder_data
assert isinstance(folder_data["flows"], list)
@pytest.mark.usefixtures("active_user")
async def test_read_folder_with_pagination(client: AsyncClient, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description")
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description")
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201
created_folder = response.json()
folder_id = created_folder["id"]
# Read the folder with pagination
# Read the project with pagination
response = await client.get(
f"api/v1/folders/{folder_id}", headers=logged_in_headers, params={"page": 1, "size": 10}
f"api/v1/projects/{folder_id}", headers=logged_in_headers, params={"page": 1, "size": 10}
)
assert response.status_code == 200
folder_data = response.json()
@ -667,7 +667,7 @@ async def test_read_folder_with_pagination(client: AsyncClient, logged_in_header
assert "folder" in folder_data
assert "flows" in folder_data
assert folder_data["folder"]["name"] == folder_name
assert folder_data["folder"]["description"] == "Test folder description"
assert folder_data["folder"]["description"] == "Test project description"
assert folder_data["flows"]["page"] == 1
assert folder_data["flows"]["size"] == 10
assert isinstance(folder_data["flows"]["items"], list)
@ -675,16 +675,16 @@ async def test_read_folder_with_pagination(client: AsyncClient, logged_in_header
@pytest.mark.usefixtures("active_user")
async def test_read_folder_with_flows(client: AsyncClient, json_flow: str, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
# Create a new project
folder_name = f"Test Project {uuid4()}"
flow_name = f"Test Flow {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description")
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
project = FolderCreate(name=folder_name, description="Test project description")
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201
created_folder = response.json()
folder_id = created_folder["id"]
# Create a flow in the folder
# Create a flow in the project
flow_data = orjson.loads(json_flow)
data = flow_data["data"]
flow = FlowCreate(name=flow_name, description="description", data=data)
@ -692,12 +692,12 @@ async def test_read_folder_with_flows(client: AsyncClient, json_flow: str, logge
response = await client.post("api/v1/flows/", json=flow.model_dump(), headers=logged_in_headers)
assert response.status_code == 201
# Read the folder with flows
response = await client.get(f"api/v1/folders/{folder_id}", headers=logged_in_headers)
# Read the project with flows
response = await client.get(f"api/v1/projects/{folder_id}", headers=logged_in_headers)
assert response.status_code == 200
folder_data = response.json()
assert folder_data["name"] == folder_name
assert folder_data["description"] == "Test folder description"
assert folder_data["description"] == "Test project description"
assert len(folder_data["flows"]) == 1
assert folder_data["flows"][0]["name"] == flow_name
@ -705,22 +705,22 @@ async def test_read_folder_with_flows(client: AsyncClient, json_flow: str, logge
@pytest.mark.usefixtures("active_user")
async def test_read_nonexistent_folder(client: AsyncClient, logged_in_headers):
nonexistent_id = str(uuid4())
response = await client.get(f"api/v1/folders/{nonexistent_id}", headers=logged_in_headers)
response = await client.get(f"api/v1/projects/{nonexistent_id}", headers=logged_in_headers)
assert response.status_code == 404
assert response.json()["detail"] == "Folder not found"
assert response.json()["detail"] == "Project not found"
@pytest.mark.usefixtures("active_user")
async def test_read_folder_with_search(client: AsyncClient, json_flow: str, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description")
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description")
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201
created_folder = response.json()
folder_id = created_folder["id"]
# Create two flows in the folder
# Create two flows in the project
flow_data = orjson.loads(json_flow)
flow_name_1 = f"Test Flow 1 {uuid4()}"
flow_name_2 = f"Another Flow {uuid4()}"
@ -736,9 +736,9 @@ async def test_read_folder_with_search(client: AsyncClient, json_flow: str, logg
await client.post("api/v1/flows/", json=flow1.model_dump(), headers=logged_in_headers)
await client.post("api/v1/flows/", json=flow2.model_dump(), headers=logged_in_headers)
# Read the folder with search
# Read the project with search
response = await client.get(
f"api/v1/folders/{folder_id}", headers=logged_in_headers, params={"search": "Test", "page": 1, "size": 10}
f"api/v1/projects/{folder_id}", headers=logged_in_headers, params={"search": "Test", "page": 1, "size": 10}
)
assert response.status_code == 200
folder_data = response.json()
@ -748,15 +748,15 @@ async def test_read_folder_with_search(client: AsyncClient, json_flow: str, logg
@pytest.mark.usefixtures("active_user")
async def test_read_folder_with_component_filter(client: AsyncClient, json_flow: str, logged_in_headers):
# Create a new folder
folder_name = f"Test Folder {uuid4()}"
folder = FolderCreate(name=folder_name, description="Test folder description")
response = await client.post("api/v1/folders/", json=folder.model_dump(), headers=logged_in_headers)
# Create a new project
folder_name = f"Test Project {uuid4()}"
project = FolderCreate(name=folder_name, description="Test project description")
response = await client.post("api/v1/projects/", json=project.model_dump(), headers=logged_in_headers)
assert response.status_code == 201
created_folder = response.json()
folder_id = created_folder["id"]
# Create a component flow in the folder
# Create a component flow in the project
flow_data = orjson.loads(json_flow)
component_flow_name = f"Component Flow {uuid4()}"
component_flow = FlowCreate(
@ -769,9 +769,9 @@ async def test_read_folder_with_component_filter(client: AsyncClient, json_flow:
component_flow.folder_id = folder_id
await client.post("api/v1/flows/", json=component_flow.model_dump(), headers=logged_in_headers)
# Read the folder with component filter
# Read the project with component filter
response = await client.get(
f"api/v1/folders/{folder_id}", headers=logged_in_headers, params={"is_component": True, "page": 1, "size": 10}
f"api/v1/projects/{folder_id}", headers=logged_in_headers, params={"is_component": True, "page": 1, "size": 10}
)
assert response.status_code == 200
folder_data = response.json()