mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-27 09:18:09 +00:00
262 lines
8.6 KiB
Python
262 lines
8.6 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2016 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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from pkg_resources import parse_version
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from ..controller.controller_error import ControllerError
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from ..config import Config
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from ..version import __version__
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import logging
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log = logging.getLogger(__name__)
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class ComputeError(ControllerError):
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pass
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class Compute:
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"""
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A GNS3 compute.
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"""
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def __init__(self, compute_id, controller=None, protocol="http", host="localhost", port=8000, user=None, password=None):
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assert controller is not None
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log.info("Create compute %s", compute_id)
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self._id = compute_id
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self._protocol = protocol
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self._host = host
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self._port = port
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self._user = None
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self._password = None
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self._connected = False
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self._controller = controller
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self._set_auth(user, password)
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self._session = aiohttp.ClientSession()
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self._version = None
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# If the compute is local but the compute id is local
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# it's a configuration issue
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if compute_id == "local" and Config.instance().get_section_config("Server")["local"] is False:
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raise ComputeError("The local compute is started without --local")
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def __del__(self):
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self._session.close()
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def _set_auth(self, user, password):
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"""
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Set authentication parameters
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"""
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self._user = user
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self._password = password
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if self._user and self._password:
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self._auth = aiohttp.BasicAuth(self._user, self._password)
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else:
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self._auth = None
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@property
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def version(self):
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"""
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:returns: Version of compute node (string or None if not connected)
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"""
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return self._version
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@property
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def connected(self):
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"""
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:returns: True if compute node is connected
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"""
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return self._connected
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@property
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def id(self):
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"""
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:returns: Compute identifier (string)
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"""
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return self._id
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@property
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def host(self):
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"""
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:returns: Compute host (string)
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"""
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return self._host
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@property
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def port(self):
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"""
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:returns: Compute port (integer)
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"""
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return self._port
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@property
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def protocol(self):
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"""
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:returns: Compute protocol (string)
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"""
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return self._protocol
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@property
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def user(self):
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return self._user
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@user.setter
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def user(self, value):
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self._set_auth(value, self._password)
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@property
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def password(self):
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return self._password
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@user.setter
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def password(self, value):
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self._set_auth(self._user, value)
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def __json__(self):
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return {
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"compute_id": self._id,
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"protocol": self._protocol,
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"host": self._host,
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"port": self._port,
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"user": self._user,
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"connected": self._connected
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}
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@asyncio.coroutine
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def steam_file(self, project, path):
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"""
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Read file of a project and stream it
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:param project: A project object
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:param path: The path of the file in the project
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:returns: A file stream
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"""
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url = self._getUrl("/projects/{}/stream/{}".format(project.id, path))
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response = yield from self._session.request("GET", url, auth=self._auth)
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if response.status == 404:
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raise aiohttp.web.HTTPNotFound(text="{} not found on compute".format(path))
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return response.content
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@asyncio.coroutine
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def http_query(self, method, path, data=None):
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if not self._connected:
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yield from self._connect()
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if not self._connected:
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raise aiohttp.web.HTTPConflict(text="The server {} is not a GNS3 server".format(self._id))
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response = yield from self._run_http_query(method, path, data=data)
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return response
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@asyncio.coroutine
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def _connect(self):
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"""
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Check if remote server is accessible
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"""
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if not self._connected:
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response = yield from self._run_http_query("GET", "/version")
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if "version" not in response.json:
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raise aiohttp.web.HTTPConflict(text="The server {} is not a GNS3 server".format(self._id))
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self._version = response.json["version"]
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if parse_version(__version__)[:2] != parse_version(response.json["version"])[:2]:
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raise aiohttp.web.HTTPConflict(text="The server {} versions are not compatible {} != {}".format(self._id, __version__, response.json["version"]))
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self._notifications = asyncio.async(self._connect_notification())
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self._connected = True
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@asyncio.coroutine
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def _connect_notification(self):
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"""
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Connect to the notification stream
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"""
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ws = yield from self._session.ws_connect(self._getUrl("/notifications/ws"))
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while True:
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response = yield from ws.receive()
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if response.tp == aiohttp.MsgType.closed or response.tp == aiohttp.MsgType.error:
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self._connected = False
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break
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msg = json.loads(response.data)
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action = msg.pop("action")
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event = msg.pop("event")
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self._controller.emit(action, event, compute_id=self.id, **msg)
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def _getUrl(self, path):
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return "{}://{}:{}/v2/compute{}".format(self._protocol, self._host, self._port, path)
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@asyncio.coroutine
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def _run_http_query(self, method, path, data=None):
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with aiohttp.Timeout(10):
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url = self._getUrl(path)
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headers = {'content-type': 'application/json'}
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if data == {}:
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data = None
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elif data is not None:
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if hasattr(data, '__json__'):
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data = data.__json__()
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data = json.dumps(data)
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response = yield from self._session.request(method, url, headers=headers, data=data, auth=self._auth)
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body = yield from response.read()
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if body:
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body = body.decode()
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if response.status >= 300:
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if response.status == 400:
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raise aiohttp.web.HTTPBadRequest(text="Bad request {} {}".format(url, body))
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elif response.status == 401:
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raise aiohttp.web.HTTPUnauthorized(text="Invalid authentication for compute {}".format(self.id))
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elif response.status == 403:
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raise aiohttp.web.HTTPForbidden(text="Forbidden {} {}".format(url, body))
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elif response.status == 404:
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raise aiohttp.web.HTTPNotFound(text="{} not found on compute".format(url))
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elif response.status == 409:
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raise aiohttp.web.HTTPConflict(text="Conflict {} {}".format(url, body))
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elif response.status == 503:
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raise aiohttp.web.HTTPServiceUnavailable(text="Service unavailable {} {}".format(url, body))
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else:
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raise NotImplementedError("{} status code is not supported".format(response.status))
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if body and len(body):
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try:
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response.json = json.loads(body)
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except ValueError:
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raise aiohttp.web.HTTPConflict(text="The server {} is not a GNS3 server".format(self._id))
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if response.json is None:
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response.json = {}
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return response
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@asyncio.coroutine
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def get(self, path):
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return (yield from self.http_query("GET", path))
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@asyncio.coroutine
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def post(self, path, data={}):
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response = yield from self.http_query("POST", path, data)
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return response
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@asyncio.coroutine
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def put(self, path, data={}):
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response = yield from self.http_query("PUT", path, data)
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return response
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@asyncio.coroutine
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def delete(self, path):
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return (yield from self.http_query("DELETE", path))
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