mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-01 12:48:14 +00:00
468 lines
15 KiB
Python
468 lines
15 KiB
Python
#
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# Copyright (C) 2020 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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API routes for nodes.
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"""
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import aiohttp
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import asyncio
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from fastapi import APIRouter, Depends, WebSocket, WebSocketDisconnect, Request, Response, status
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from fastapi.encoders import jsonable_encoder
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from fastapi.routing import APIRoute
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from typing import List, Callable
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from uuid import UUID
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from gns3server.controller import Controller
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from gns3server.controller.node import Node
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from gns3server.controller.project import Project
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from gns3server.utils import force_unix_path
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from gns3server.utils.http_client import HTTPClient
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from gns3server.controller.controller_error import ControllerForbiddenError, ControllerBadRequestError
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from gns3server import schemas
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import logging
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log = logging.getLogger(__name__)
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node_locks = {}
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class NodeConcurrency(APIRoute):
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"""
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To avoid strange effects, we prevent concurrency
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between the same instance of the node
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(excepting when streaming a PCAP file and for WebSocket consoles).
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"""
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def get_route_handler(self) -> Callable:
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original_route_handler = super().get_route_handler()
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async def custom_route_handler(request: Request) -> Response:
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node_id = request.path_params.get("node_id")
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project_id = request.path_params.get("project_id")
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if node_id and "pcap" not in request.url.path and not request.url.path.endswith("console/ws"):
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lock_key = f"{project_id}:{node_id}"
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node_locks.setdefault(lock_key, {"lock": asyncio.Lock(), "concurrency": 0})
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node_locks[lock_key]["concurrency"] += 1
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async with node_locks[lock_key]["lock"]:
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response = await original_route_handler(request)
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node_locks[lock_key]["concurrency"] -= 1
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if node_locks[lock_key]["concurrency"] <= 0:
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del node_locks[lock_key]
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else:
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response = await original_route_handler(request)
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return response
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return custom_route_handler
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responses = {404: {"model": schemas.ErrorMessage, "description": "Could not find project or node"}}
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router = APIRouter(route_class=NodeConcurrency, responses=responses)
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async def dep_project(project_id: UUID) -> Project:
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"""
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Dependency to retrieve a project.
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"""
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project = await Controller.instance().get_loaded_project(str(project_id))
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return project
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async def dep_node(node_id: UUID, project: Project = Depends(dep_project)) -> None:
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"""
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Dependency to retrieve a node.
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"""
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node = project.get_node(str(node_id))
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return node
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@router.post(
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"",
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status_code=status.HTTP_201_CREATED,
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response_model=schemas.Node,
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responses={
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404: {"model": schemas.ErrorMessage, "description": "Could not find project"},
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409: {"model": schemas.ErrorMessage, "description": "Could not create node"},
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},
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)
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async def create_node(node_data: schemas.NodeCreate, project: Project = Depends(dep_project)) -> schemas.Node:
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"""
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Create a new node.
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"""
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controller = Controller.instance()
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compute = controller.get_compute(str(node_data.compute_id))
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node_data = jsonable_encoder(node_data, exclude_unset=True)
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node = await project.add_node(compute, node_data.pop("name"), node_data.pop("node_id", None), **node_data)
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return node.asdict()
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@router.get("", response_model=List[schemas.Node], response_model_exclude_unset=True)
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async def get_nodes(project: Project = Depends(dep_project)) -> List[schemas.Node]:
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"""
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Return all nodes belonging to a given project.
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"""
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return [v.asdict() for v in project.nodes.values()]
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@router.post("/start", status_code=status.HTTP_204_NO_CONTENT)
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async def start_all_nodes(project: Project = Depends(dep_project)) -> Response:
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"""
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Start all nodes belonging to a given project.
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"""
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await project.start_all()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/stop", status_code=status.HTTP_204_NO_CONTENT)
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async def stop_all_nodes(project: Project = Depends(dep_project)) -> Response:
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"""
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Stop all nodes belonging to a given project.
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"""
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await project.stop_all()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/suspend", status_code=status.HTTP_204_NO_CONTENT)
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async def suspend_all_nodes(project: Project = Depends(dep_project)) -> Response:
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"""
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Suspend all nodes belonging to a given project.
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"""
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await project.suspend_all()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/reload", status_code=status.HTTP_204_NO_CONTENT)
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async def reload_all_nodes(project: Project = Depends(dep_project)) -> Response:
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"""
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Reload all nodes belonging to a given project.
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"""
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await project.stop_all()
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await project.start_all()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.get("/{node_id}", response_model=schemas.Node)
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def get_node(node: Node = Depends(dep_node)) -> schemas.Node:
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"""
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Return a node from a given project.
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"""
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return node.asdict()
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@router.put("/{node_id}", response_model=schemas.Node, response_model_exclude_unset=True)
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async def update_node(node_data: schemas.NodeUpdate, node: Node = Depends(dep_node)) -> schemas.Node:
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"""
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Update a node.
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"""
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node_data = jsonable_encoder(node_data, exclude_unset=True)
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# Ignore these because we only use them when creating a node
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node_data.pop("node_id", None)
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node_data.pop("node_type", None)
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node_data.pop("compute_id", None)
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await node.update(**node_data)
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return node.asdict()
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@router.delete(
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"/{node_id}",
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status_code=status.HTTP_204_NO_CONTENT,
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responses={**responses, 409: {"model": schemas.ErrorMessage, "description": "Cannot delete node"}},
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)
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async def delete_node(node_id: UUID, project: Project = Depends(dep_project)) -> Response:
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"""
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Delete a node from a project.
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"""
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await project.delete_node(str(node_id))
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/duplicate", response_model=schemas.Node, status_code=status.HTTP_201_CREATED)
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async def duplicate_node(duplicate_data: schemas.NodeDuplicate, node: Node = Depends(dep_node)) -> schemas.Node:
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"""
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Duplicate a node.
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"""
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new_node = await node.project.duplicate_node(node, duplicate_data.x, duplicate_data.y, duplicate_data.z)
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return new_node.asdict()
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@router.post("/{node_id}/start", status_code=status.HTTP_204_NO_CONTENT)
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async def start_node(start_data: dict, node: Node = Depends(dep_node)) -> Response:
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"""
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Start a node.
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"""
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await node.start(data=start_data)
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/stop", status_code=status.HTTP_204_NO_CONTENT)
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async def stop_node(node: Node = Depends(dep_node)) -> Response:
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"""
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Stop a node.
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"""
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await node.stop()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/suspend", status_code=status.HTTP_204_NO_CONTENT)
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async def suspend_node(node: Node = Depends(dep_node)) -> Response:
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"""
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Suspend a node.
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"""
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await node.suspend()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/reload", status_code=status.HTTP_204_NO_CONTENT)
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async def reload_node(node: Node = Depends(dep_node)) -> Response:
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"""
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Reload a node.
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"""
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await node.reload()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/isolate", status_code=status.HTTP_204_NO_CONTENT)
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async def isolate_node(node: Node = Depends(dep_node)) -> Response:
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"""
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Isolate a node (suspend all attached links).
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"""
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for link in node.links:
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await link.update_suspend(True)
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/unisolate", status_code=status.HTTP_204_NO_CONTENT)
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async def unisolate_node(node: Node = Depends(dep_node)) -> Response:
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"""
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Un-isolate a node (resume all attached suspended links).
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"""
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for link in node.links:
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await link.update_suspend(False)
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.get("/{node_id}/links", response_model=List[schemas.Link], response_model_exclude_unset=True)
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async def get_node_links(node: Node = Depends(dep_node)) -> List[schemas.Link]:
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"""
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Return all the links connected to a node.
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"""
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links = []
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for link in node.links:
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links.append(link.asdict())
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return links
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@router.get("/{node_id}/dynamips/auto_idlepc")
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async def auto_idlepc(node: Node = Depends(dep_node)) -> str:
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"""
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Compute an Idle-PC value for a Dynamips node
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"""
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if node.node_type != "dynamips":
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raise ControllerBadRequestError("Auto Idle-PC is only supported on a Dynamips node")
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return await node.dynamips_auto_idlepc()
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@router.get("/{node_id}/dynamips/idlepc_proposals")
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async def idlepc_proposals(node: Node = Depends(dep_node)) -> List[str]:
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"""
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Compute a list of potential idle-pc values for a Dynamips node
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"""
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if node.node_type != "dynamips":
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raise ControllerBadRequestError("Idle-PC proposals is only supported on a Dynamips node")
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return await node.dynamips_idlepc_proposals()
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@router.post("/{node_id}/qemu/disk_image/{disk_name}", status_code=status.HTTP_204_NO_CONTENT)
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async def create_disk_image(
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disk_name: str,
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disk_data: schemas.QemuDiskImageCreate,
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node: Node = Depends(dep_node)
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) -> Response:
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"""
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Create a Qemu disk image.
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"""
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if node.node_type != "qemu":
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raise ControllerBadRequestError("Creating a disk image is only supported on a Qemu node")
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await node.post(f"/disk_image/{disk_name}", data=disk_data.dict(exclude_unset=True))
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.put("/{node_id}/qemu/disk_image/{disk_name}", status_code=status.HTTP_204_NO_CONTENT)
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async def update_disk_image(
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disk_name: str,
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disk_data: schemas.QemuDiskImageUpdate,
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node: Node = Depends(dep_node)
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) -> Response:
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"""
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Update a Qemu disk image.
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"""
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if node.node_type != "qemu":
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raise ControllerBadRequestError("Updating a disk image is only supported on a Qemu node")
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await node.put(f"/disk_image/{disk_name}", data=disk_data.dict(exclude_unset=True))
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.delete("/{node_id}/qemu/disk_image/{disk_name}", status_code=status.HTTP_204_NO_CONTENT)
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async def delete_disk_image(
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disk_name: str,
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node: Node = Depends(dep_node)
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) -> Response:
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"""
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Delete a Qemu disk image.
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"""
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if node.node_type != "qemu":
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raise ControllerBadRequestError("Deleting a disk image is only supported on a Qemu node")
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await node.delete(f"/disk_image/{disk_name}")
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.get("/{node_id}/files/{file_path:path}")
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async def get_file(file_path: str, node: Node = Depends(dep_node)) -> Response:
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"""
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Return a file in the node directory
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"""
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path = force_unix_path(file_path)
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# Raise error if user try to escape
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if path[0] == ".":
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raise ControllerForbiddenError("It is forbidden to get a file outside the project directory")
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node_type = node.node_type
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path = f"/project-files/{node_type}/{node.id}/{path}"
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res = await node.compute.http_query("GET", f"/projects/{node.project.id}/files{path}", timeout=None, raw=True)
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return Response(res.body, media_type="application/octet-stream", status_code=res.status)
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@router.post("/{node_id}/files/{file_path:path}", status_code=status.HTTP_201_CREATED)
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async def post_file(file_path: str, request: Request, node: Node = Depends(dep_node)):
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"""
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Write a file in the node directory.
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"""
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path = force_unix_path(file_path)
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# Raise error if user try to escape
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if path[0] == ".":
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raise ControllerForbiddenError("Cannot write outside the node directory")
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node_type = node.node_type
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path = f"/project-files/{node_type}/{node.id}/{path}"
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data = await request.body() # FIXME: are we handling timeout or large files correctly?
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await node.compute.http_query("POST", f"/projects/{node.project.id}/files{path}", data=data, timeout=None, raw=True)
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# FIXME: response with correct status code (from compute)
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@router.websocket("/{node_id}/console/ws")
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async def ws_console(websocket: WebSocket, node: Node = Depends(dep_node)) -> None:
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"""
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WebSocket console.
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"""
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compute = node.compute
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await websocket.accept()
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log.info(
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f"New client {websocket.client.host}:{websocket.client.port} has connected to controller console WebSocket"
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)
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ws_console_compute_url = (
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f"ws://{compute.host}:{compute.port}/v3/compute/projects/"
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f"{node.project.id}/{node.node_type}/nodes/{node.id}/console/ws"
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)
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async def ws_receive(ws_console_compute):
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"""
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Receive WebSocket data from client and forward to compute console WebSocket.
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"""
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try:
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while True:
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data = await websocket.receive_text()
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if data:
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await ws_console_compute.send_str(data)
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except WebSocketDisconnect:
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await ws_console_compute.close()
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log.info(
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f"Client {websocket.client.host}:{websocket.client.port} has disconnected from controller"
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f" console WebSocket"
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)
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try:
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# receive WebSocket data from compute console WebSocket and forward to client.
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async with HTTPClient.get_client().ws_connect(ws_console_compute_url) as ws_console_compute:
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asyncio.ensure_future(ws_receive(ws_console_compute))
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async for msg in ws_console_compute:
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if msg.type == aiohttp.WSMsgType.TEXT:
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await websocket.send_text(msg.data)
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elif msg.type == aiohttp.WSMsgType.BINARY:
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await websocket.send_bytes(msg.data)
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elif msg.type == aiohttp.WSMsgType.ERROR:
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break
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except aiohttp.ClientError as e:
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log.error(f"Client error received when forwarding to compute console WebSocket: {e}")
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@router.post("/console/reset", status_code=status.HTTP_204_NO_CONTENT)
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async def reset_console_all_nodes(project: Project = Depends(dep_project)) -> Response:
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"""
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Reset console for all nodes belonging to the project.
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"""
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await project.reset_console_all()
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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@router.post("/{node_id}/console/reset", status_code=status.HTTP_204_NO_CONTENT)
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async def console_reset(node: Node = Depends(dep_node)) -> Response:
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await node.post("/console/reset")
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return Response(status_code=status.HTTP_204_NO_CONTENT)
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