mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-19 04:47:54 +00:00
304 lines
12 KiB
Python
304 lines
12 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 os
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import sys
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import json
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import asyncio
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import aiofiles
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import aiohttp
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import zipfile
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import tempfile
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from datetime import datetime
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import logging
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log = logging.getLogger(__name__)
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CHUNK_SIZE = 1024 * 8 # 8KB
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async def export_project(zstream, project, temporary_dir, include_images=False, include_snapshots=False, keep_compute_id=False, allow_all_nodes=False, reset_mac_addresses=False):
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"""
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Export a project to a zip file.
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The file will be read chunk by chunk when you iterate over the zip stream.
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Some files like snapshots and packet captures are ignored.
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:param zstream: ZipStream object
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:param project: Project instance
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:param temporary_dir: A temporary dir where to store intermediate data
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:param include_images: save OS images to the zip file
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:param include_snapshots: save snapshots to the zip file
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:param keep_compute_id: If false replace all compute id by local (standard behavior for .gns3project to make it portable)
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:param allow_all_nodes: Allow all nodes type to be include in the zip even if not portable
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:param reset_mac_addresses: Reset MAC addresses for every nodes.
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"""
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# To avoid issue with data not saved we disallow the export of a running project
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if project.is_running():
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raise aiohttp.web.HTTPConflict(text="Project must be stopped in order to export it")
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# Make sure we save the project
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project.dump()
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if not os.path.exists(project._path):
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raise aiohttp.web.HTTPNotFound(text="Project could not be found at '{}'".format(project._path))
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# First we process the .gns3 in order to be sure we don't have an error
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for file in os.listdir(project._path):
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if file.endswith(".gns3"):
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await _patch_project_file(project, os.path.join(project._path, file), zstream, include_images, keep_compute_id, allow_all_nodes, temporary_dir, reset_mac_addresses)
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# Export the local files
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for root, dirs, files in os.walk(project._path, topdown=True, followlinks=False):
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try:
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files = [f for f in files if _is_exportable(os.path.join(root, f), include_snapshots)]
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for file in files:
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path = os.path.join(root, file)
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# check if we can export the file
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try:
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open(path).close()
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except OSError as e:
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msg = "Could not export file {}: {}".format(path, e)
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log.warning(msg)
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project.emit_notification("log.warning", {"message": msg})
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continue
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# ignore the .gns3 file
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if file.endswith(".gns3"):
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continue
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_patch_mtime(path)
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zstream.write(path, os.path.relpath(path, project._path))
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# save empty directories
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for directory in dirs:
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path = os.path.join(root, directory)
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if not os.listdir(path):
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zstream.write(path, os.path.relpath(path, project._path))
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except FileNotFoundError as e:
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log.warning("Cannot export local file: {}".format(e))
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continue
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# Export files from remote computes
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for compute in project.computes:
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if compute.id != "local":
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compute_files = await compute.list_files(project)
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for compute_file in compute_files:
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if _is_exportable(compute_file["path"], include_snapshots):
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log.debug("Downloading file '{}' from compute '{}'".format(compute_file["path"], compute.id))
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response = await compute.download_file(project, compute_file["path"])
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if response.status != 200:
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log.warning("Cannot export file from compute '{}'. Compute returned status code {}.".format(compute.id, response.status))
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continue
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(fd, temp_path) = tempfile.mkstemp(dir=temporary_dir)
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async with aiofiles.open(fd, 'wb') as f:
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while True:
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try:
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data = await response.content.read(CHUNK_SIZE)
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except asyncio.TimeoutError:
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raise aiohttp.web.HTTPRequestTimeout(text="Timeout when downloading file '{}' from remote compute {}:{}".format(compute_file["path"], compute.host, compute.port))
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if not data:
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break
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await f.write(data)
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response.close()
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_patch_mtime(temp_path)
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zstream.write(temp_path, arcname=compute_file["path"])
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def _patch_mtime(path):
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"""
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Patch the file mtime because ZIP does not support timestamps before 1980
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:param path: file path
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"""
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if sys.platform.startswith("win"):
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# only UNIX type platforms
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return
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st = os.stat(path)
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file_date = datetime.fromtimestamp(st.st_mtime)
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if file_date.year < 1980:
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new_mtime = file_date.replace(year=1980).timestamp()
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os.utime(path, (st.st_atime, new_mtime))
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def _is_exportable(path, include_snapshots=False):
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"""
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:returns: True if file should not be included in the final archive
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"""
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# do not export snapshots by default
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if include_snapshots is False and path.endswith("snapshots"):
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return False
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# do not export symlinks
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if os.path.islink(path):
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return False
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# do not export directories of snapshots
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if include_snapshots is False and "{sep}snapshots{sep}".format(sep=os.path.sep) in path:
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return False
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try:
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# do not export captures and other temporary directory
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s = os.path.normpath(path).split(os.path.sep)
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i = s.index("project-files")
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if include_snapshots is False and s[i + 1] == "snapshots":
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return False
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if s[i + 1] in ("tmp", "captures"):
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return False
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except (ValueError, IndexError):
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pass
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# do not export log files and OS noise
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filename = os.path.basename(path)
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if filename.endswith('_log.txt') or filename.endswith('.log') or filename == '.DS_Store':
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return False
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return True
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async def _patch_project_file(project, path, zstream, include_images, keep_compute_id, allow_all_nodes, temporary_dir, reset_mac_addresses):
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"""
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Patch a project file (.gns3) to export a project.
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The .gns3 file is renamed to project.gns3
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:param path: path of the .gns3 file
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"""
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# image files that we need to include in the exported archive
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images = []
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try:
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with open(path) as f:
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topology = json.load(f)
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except (OSError, ValueError) as e:
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raise aiohttp.web.HTTPConflict(text="Project file '{}' cannot be read: {}".format(path, e))
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if "topology" in topology:
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if "nodes" in topology["topology"]:
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for node in topology["topology"]["nodes"]:
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compute_id = node.get('compute_id', 'local')
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if node["node_type"] == "virtualbox" and node.get("properties", {}).get("linked_clone"):
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raise aiohttp.web.HTTPConflict(text="Projects with a linked {} clone node cannot not be exported. Please use Qemu instead.".format(node["node_type"]))
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if not allow_all_nodes and node["node_type"] in ["virtualbox", "vmware"]:
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raise aiohttp.web.HTTPConflict(text="Projects with a {} node cannot be exported".format(node["node_type"]))
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if not keep_compute_id:
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node["compute_id"] = "local" # To make project portable all node by default run on local
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if "properties" in node and node["node_type"] != "docker":
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for prop, value in node["properties"].items():
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# reset the MAC address
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if reset_mac_addresses and prop in ("mac_addr", "mac_address"):
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node["properties"][prop] = None
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if node["node_type"] == "iou":
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if not prop == "path":
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continue
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elif not prop.endswith("image"):
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continue
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if value is None or value.strip() == '':
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continue
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if not keep_compute_id: # If we keep the original compute we can keep the image path
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node["properties"][prop] = os.path.basename(value)
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if include_images is True:
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images.append({
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'compute_id': compute_id,
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'image': value,
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'image_type': node['node_type']
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})
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if not keep_compute_id:
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topology["topology"]["computes"] = [] # Strip compute information because could contain secret info like password
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local_images = set([i['image'] for i in images if i['compute_id'] == 'local'])
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for image in local_images:
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_export_local_image(image, zstream)
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remote_images = set([
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(i['compute_id'], i['image_type'], i['image'])
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for i in images if i['compute_id'] != 'local'])
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for compute_id, image_type, image in remote_images:
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await _export_remote_images(project, compute_id, image_type, image, zstream, temporary_dir)
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zstream.writestr("project.gns3", json.dumps(topology).encode())
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return images
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def _export_local_image(image, zstream):
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"""
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Exports a local image to the zip file.
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:param image: image path
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:param zstream: Zipfile instance for the export
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"""
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from ..compute import MODULES
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for module in MODULES:
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try:
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images_directory = module.instance().get_images_directory()
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except NotImplementedError:
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# Some modules don't have images
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continue
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directory = os.path.split(images_directory)[-1:][0]
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if os.path.exists(image):
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path = image
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else:
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path = os.path.join(images_directory, image)
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if os.path.exists(path):
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arcname = os.path.join("images", directory, os.path.basename(image))
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_patch_mtime(path)
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zstream.write(path, arcname)
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return
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async def _export_remote_images(project, compute_id, image_type, image, project_zipfile, temporary_dir):
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"""
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Export specific image from remote compute.
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"""
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log.debug("Downloading image '{}' from compute '{}'".format(image, compute_id))
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try:
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compute = [compute for compute in project.computes if compute.id == compute_id][0]
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except IndexError:
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raise aiohttp.web.HTTPConflict(text="Cannot export image from '{}' compute. Compute doesn't exist.".format(compute_id))
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response = await compute.download_image(image_type, image)
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if response.status != 200:
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raise aiohttp.web.HTTPConflict(text="Cannot export image from compute '{}'. Compute returned status code {}.".format(compute_id, response.status))
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(fd, temp_path) = tempfile.mkstemp(dir=temporary_dir)
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async with aiofiles.open(fd, 'wb') as f:
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while True:
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try:
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data = await response.content.read(CHUNK_SIZE)
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except asyncio.TimeoutError:
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raise aiohttp.web.HTTPRequestTimeout(text="Timeout when downloading image '{}' from remote compute {}:{}".format(image, compute.host, compute.port))
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if not data:
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break
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await f.write(data)
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response.close()
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arcname = os.path.join("images", image_type, image)
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project_zipfile.write(temp_path, arcname=arcname, compress_type=zipfile.ZIP_DEFLATED)
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