mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-28 11:18:11 +00:00
300 lines
9.9 KiB
Python
300 lines
9.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 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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import aiohttp
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import asyncio
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import json
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import os
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import psutil
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from gns3server.web.route import Route
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from gns3server.compute.project_manager import ProjectManager
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from gns3server.compute import MODULES
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from gns3server.utils.cpu_percent import CpuPercent
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from gns3server.utils.path import is_safe_path
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from gns3server.schemas.project import (
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PROJECT_OBJECT_SCHEMA,
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PROJECT_CREATE_SCHEMA,
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PROJECT_UPDATE_SCHEMA,
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PROJECT_FILE_LIST_SCHEMA,
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PROJECT_LIST_SCHEMA
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)
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import logging
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log = logging.getLogger()
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CHUNK_SIZE = 1024 * 8 # 8KB
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class ProjectHandler:
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# How many clients have subscribed to notifications
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_notifications_listening = {}
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@Route.get(
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r"/projects",
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description="List all projects opened on the server",
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status_codes={
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200: "Project list",
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},
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output=PROJECT_LIST_SCHEMA
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)
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def list_projects(request, response):
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pm = ProjectManager.instance()
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response.set_status(200)
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response.json(list(pm.projects))
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@Route.post(
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r"/projects",
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description="Create a new project on the server",
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status_codes={
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201: "Project created",
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403: "Forbidden to create a project",
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409: "Project already created"
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},
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output=PROJECT_OBJECT_SCHEMA,
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input=PROJECT_CREATE_SCHEMA)
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def create_project(request, response):
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pm = ProjectManager.instance()
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p = pm.create_project(
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name=request.json.get("name"),
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path=request.json.get("path"),
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project_id=request.json.get("project_id"),
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variables=request.json.get("variables", None)
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)
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response.set_status(201)
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response.json(p)
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@Route.put(
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r"/projects/{project_id}",
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description="Update the project on the server",
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status_codes={
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201: "Project updated",
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403: "Forbidden to update a project"
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},
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output=PROJECT_OBJECT_SCHEMA,
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input=PROJECT_UPDATE_SCHEMA)
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async def update_project(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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await project.update(
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variables=request.json.get("variables", None)
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)
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response.set_status(200)
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response.json(project)
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@Route.get(
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r"/projects/{project_id}",
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description="Get project information",
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parameters={
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"project_id": "Project UUID",
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},
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status_codes={
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200: "Success",
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404: "The project doesn't exist"
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},
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output=PROJECT_OBJECT_SCHEMA)
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def show(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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response.json(project)
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@Route.post(
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r"/projects/{project_id}/close",
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description="Close a project",
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parameters={
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"project_id": "Project UUID",
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},
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status_codes={
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204: "Project closed",
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404: "The project doesn't exist"
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})
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async def close(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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if ProjectHandler._notifications_listening.setdefault(project.id, 0) <= 1:
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await project.close()
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pm.remove_project(project.id)
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try:
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del ProjectHandler._notifications_listening[project.id]
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except KeyError:
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pass
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else:
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log.warning("Skip project closing, another client is listening for project notifications")
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response.set_status(204)
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@Route.delete(
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r"/projects/{project_id}",
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description="Delete a project from disk",
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parameters={
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"project_id": "Project UUID",
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},
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status_codes={
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204: "Changes have been written on disk",
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404: "The project doesn't exist"
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})
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async def delete(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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await project.delete()
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pm.remove_project(project.id)
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response.set_status(204)
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@Route.get(
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r"/projects/{project_id}/notifications",
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description="Receive notifications about the project",
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parameters={
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"project_id": "Project UUID",
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},
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status_codes={
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200: "End of stream",
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404: "The project doesn't exist"
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})
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async def notification(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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response.content_type = "application/json"
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response.set_status(200)
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response.enable_chunked_encoding()
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response.start(request)
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queue = project.get_listen_queue()
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ProjectHandler._notifications_listening.setdefault(project.id, 0)
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ProjectHandler._notifications_listening[project.id] += 1
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await response.write("{}\n".format(json.dumps(ProjectHandler._getPingMessage())).encode("utf-8"))
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while True:
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try:
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(action, msg) = await asyncio.wait_for(queue.get(), 5)
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if hasattr(msg, "__json__"):
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msg = json.dumps({"action": action, "event": msg.__json__()}, sort_keys=True)
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else:
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msg = json.dumps({"action": action, "event": msg}, sort_keys=True)
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log.debug("Send notification: %s", msg)
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await response.write(("{}\n".format(msg)).encode("utf-8"))
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except asyncio.TimeoutError:
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await response.write("{}\n".format(json.dumps(ProjectHandler._getPingMessage())).encode("utf-8"))
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project.stop_listen_queue(queue)
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if project.id in ProjectHandler._notifications_listening:
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ProjectHandler._notifications_listening[project.id] -= 1
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def _getPingMessage(cls):
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"""
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Ping messages are regularly sent to the client to
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keep the connection open. We send with it some information about server load.
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:returns: hash
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"""
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stats = {}
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# Non blocking call in order to get cpu usage. First call will return 0
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stats["cpu_usage_percent"] = CpuPercent.get(interval=None)
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stats["memory_usage_percent"] = psutil.virtual_memory().percent
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return {"action": "ping", "event": stats}
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@Route.get(
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r"/projects/{project_id}/files",
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description="List files of a project",
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parameters={
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"project_id": "Project UUID",
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},
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status_codes={
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200: "Return a list of files",
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404: "The project doesn't exist"
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},
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output=PROJECT_FILE_LIST_SCHEMA)
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async def list_files(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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files = await project.list_files()
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response.json(files)
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response.set_status(200)
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@Route.get(
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r"/projects/{project_id}/files/{path:.+}",
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description="Get a file from a project",
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parameters={
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"project_id": "Project UUID",
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},
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status_codes={
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200: "File returned",
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403: "Permission denied",
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404: "The file doesn't exist"
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})
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async def get_file(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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path = os.path.normpath(request.match_info["path"])
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# Raise error if user try to escape
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if not is_safe_path(path, project.path):
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raise aiohttp.web.HTTPForbidden()
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path = os.path.join(project.path, path)
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await response.stream_file(path)
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@Route.post(
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r"/projects/{project_id}/files/{path:.+}",
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description="Write a file to a project",
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parameters={
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"project_id": "Project UUID",
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},
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raw=True,
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status_codes={
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200: "File returned",
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403: "Permission denied",
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404: "The path doesn't exist"
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})
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async def write_file(request, response):
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pm = ProjectManager.instance()
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project = pm.get_project(request.match_info["project_id"])
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path = os.path.normpath(request.match_info["path"])
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# Raise error if user try to escape
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if not is_safe_path(path, project.path):
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raise aiohttp.web.HTTPForbidden()
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path = os.path.join(project.path, path)
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response.set_status(201)
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try:
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os.makedirs(os.path.dirname(path), exist_ok=True)
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with open(path, 'wb+') as f:
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while True:
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try:
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chunk = await request.content.read(CHUNK_SIZE)
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except asyncio.TimeoutError:
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raise aiohttp.web.HTTPRequestTimeout(text="Timeout when writing to file '{}'".format(path))
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if not chunk:
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break
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f.write(chunk)
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except FileNotFoundError:
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raise aiohttp.web.HTTPNotFound()
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except PermissionError:
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raise aiohttp.web.HTTPForbidden()
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