# -*- coding: utf-8 -*- # # Copyright (C) 2015 GNS3 Technologies Inc. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . import aiohttp import asyncio import json import os import tempfile from gns3server.web.route import Route from gns3server.compute.project_manager import ProjectManager from gns3server.compute import MODULES from gns3server.utils.ping_stats import PingStats from gns3server.schemas.project import ( PROJECT_OBJECT_SCHEMA, PROJECT_CREATE_SCHEMA, PROJECT_UPDATE_SCHEMA, PROJECT_FILE_LIST_SCHEMA, PROJECT_LIST_SCHEMA ) import logging log = logging.getLogger() CHUNK_SIZE = 1024 * 8 # 8KB class ProjectHandler: # How many clients have subscribed to notifications _notifications_listening = {} @Route.get( r"/projects", description="List all projects opened on the server", status_codes={ 200: "Project list", }, output=PROJECT_LIST_SCHEMA ) def list_projects(request, response): pm = ProjectManager.instance() response.set_status(200) response.json(list(pm.projects)) @Route.post( r"/projects", description="Create a new project on the server", status_codes={ 201: "Project created", 403: "Forbidden to create a project", 409: "Project already created" }, output=PROJECT_OBJECT_SCHEMA, input=PROJECT_CREATE_SCHEMA) def create_project(request, response): pm = ProjectManager.instance() p = pm.create_project( name=request.json.get("name"), path=request.json.get("path"), project_id=request.json.get("project_id"), variables=request.json.get("variables", None) ) response.set_status(201) response.json(p) @Route.put( r"/projects/{project_id}", description="Update the project on the server", status_codes={ 201: "Project updated", 403: "Forbidden to update a project" }, output=PROJECT_OBJECT_SCHEMA, input=PROJECT_UPDATE_SCHEMA) async def update_project(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) await project.update( variables=request.json.get("variables", None) ) response.set_status(200) response.json(project) @Route.get( r"/projects/{project_id}", description="Get project information", parameters={ "project_id": "Project UUID", }, status_codes={ 200: "Success", 404: "The project doesn't exist" }, output=PROJECT_OBJECT_SCHEMA) def show(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) response.json(project) @Route.post( r"/projects/{project_id}/close", description="Close a project", parameters={ "project_id": "Project UUID", }, status_codes={ 204: "Project closed", 404: "The project doesn't exist" }) async def close(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) if ProjectHandler._notifications_listening.setdefault(project.id, 0) <= 1: await project.close() pm.remove_project(project.id) try: del ProjectHandler._notifications_listening[project.id] except KeyError: pass else: log.warning("Skip project closing, another client is listening for project notifications") response.set_status(204) @Route.delete( r"/projects/{project_id}", description="Delete a project from disk", parameters={ "project_id": "Project UUID", }, status_codes={ 204: "Changes have been written on disk", 404: "The project doesn't exist" }) async def delete(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) await project.delete() pm.remove_project(project.id) response.set_status(204) @Route.get( r"/projects/{project_id}/notifications", description="Receive notifications about the project", parameters={ "project_id": "Project UUID", }, status_codes={ 200: "End of stream", 404: "The project doesn't exist" }) async def notification(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) response.content_type = "application/json" response.set_status(200) response.enable_chunked_encoding() response.start(request) queue = project.get_listen_queue() ProjectHandler._notifications_listening.setdefault(project.id, 0) ProjectHandler._notifications_listening[project.id] += 1 await response.write("{}\n".format(json.dumps(ProjectHandler._getPingMessage())).encode("utf-8")) while True: try: (action, msg) = await asyncio.wait_for(queue.get(), 5) if hasattr(msg, "__json__"): msg = json.dumps({"action": action, "event": msg.__json__()}, sort_keys=True) else: msg = json.dumps({"action": action, "event": msg}, sort_keys=True) log.debug("Send notification: %s", msg) await response.write(("{}\n".format(msg)).encode("utf-8")) except asyncio.TimeoutError: await response.write("{}\n".format(json.dumps(ProjectHandler._getPingMessage())).encode("utf-8")) project.stop_listen_queue(queue) if project.id in ProjectHandler._notifications_listening: ProjectHandler._notifications_listening[project.id] -= 1 def _getPingMessage(cls): """ Ping messages are regularly sent to the client to keep the connection open. We send with it some information about server load. :returns: hash """ return {"action": "ping", "event": PingStats.get()} @Route.get( r"/projects/{project_id}/files", description="List files of a project", parameters={ "project_id": "Project UUID", }, status_codes={ 200: "Return a list of files", 404: "The project doesn't exist" }, output=PROJECT_FILE_LIST_SCHEMA) async def list_files(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) files = await project.list_files() response.json(files) response.set_status(200) @Route.get( r"/projects/{project_id}/files/{path:.+}", description="Get a file from a project", parameters={ "project_id": "Project UUID", }, status_codes={ 200: "File returned", 403: "Permission denied", 404: "The file doesn't exist" }) async def get_file(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) path = request.match_info["path"] path = os.path.normpath(path) # Raise error if user try to escape if path[0] == ".": raise aiohttp.web.HTTPForbidden() path = os.path.join(project.path, path) await response.stream_file(path) @Route.post( r"/projects/{project_id}/files/{path:.+}", description="Write a file to a project", parameters={ "project_id": "Project UUID", }, raw=True, status_codes={ 200: "File returned", 403: "Permission denied", 404: "The path doesn't exist" }) async def write_file(request, response): pm = ProjectManager.instance() project = pm.get_project(request.match_info["project_id"]) path = request.match_info["path"] path = os.path.normpath(path) # Raise error if user try to escape if path[0] == ".": raise aiohttp.web.HTTPForbidden() path = os.path.join(project.path, path) response.set_status(200) try: os.makedirs(os.path.dirname(path), exist_ok=True) with open(path, 'wb+') as f: while True: try: chunk = await request.content.read(CHUNK_SIZE) except asyncio.TimeoutError: raise aiohttp.web.HTTPRequestTimeout(text="Timeout when writing to file '{}'".format(path)) if not chunk: break f.write(chunk) except FileNotFoundError: raise aiohttp.web.HTTPNotFound() except PermissionError: raise aiohttp.web.HTTPForbidden()