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gns3-server/gns3server/handlers/file_upload_handler.py

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# -*- coding: utf-8 -*-
#
# Copyright (C) 2014 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 <http://www.gnu.org/licenses/>.
"""
Simple file upload & listing handler.
"""
import os
import stat
import tornado.web
from .auth_handler import GNS3BaseHandler
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from ..version import __version__
from ..config import Config
import logging
log = logging.getLogger(__name__)
class FileUploadHandler(GNS3BaseHandler):
"""
File upload handler.
:param application: Tornado Application instance
:param request: Tornado Request instance
"""
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def __init__(self, application, request, **kwargs):
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super().__init__(application, request, **kwargs)
config = Config.instance()
server_config = config.get_default_section()
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self._upload_dir = os.path.expandvars(
os.path.expanduser(server_config.get("upload_directory", "~/GNS3/images")))
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self._host = request.host
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try:
os.makedirs(self._upload_dir)
log.info("upload directory '{}' created".format(self._upload_dir))
except FileExistsError:
pass
except OSError as e:
log.error("could not create the upload directory {}: {}".format(self._upload_dir, e))
@tornado.web.authenticated
def get(self):
"""
Invoked on GET request.
"""
items = []
path = self._upload_dir
for filename in os.listdir(path):
items.append(filename)
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self.render("upload.html",
version=__version__,
host=self._host,
path=path,
items=items)
@tornado.web.authenticated
def post(self):
"""
Invoked on POST request.
"""
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if "file" in self.request.files:
fileinfo = self.request.files["file"][0]
destination_path = os.path.join(self._upload_dir, fileinfo['filename'])
try:
with open(destination_path, 'wb') as f:
f.write(fileinfo['body'])
except OSError as e:
self.write("Could not upload {}: {}".format(fileinfo['filename'], e))
return
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st = os.stat(destination_path)
os.chmod(destination_path, st.st_mode | stat.S_IXUSR)
self.redirect("/upload")