mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-24 17:28:08 +00:00
127 lines
3.7 KiB
Python
127 lines
3.7 KiB
Python
# -*- 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/>.
|
|
|
|
import os
|
|
import hashlib
|
|
|
|
|
|
from ..config import Config
|
|
from . import force_unix_path
|
|
|
|
|
|
import logging
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
def scan_for_images(type):
|
|
"""
|
|
Scan directories for available image for a type
|
|
|
|
:param type: emulator type (dynamips, qemu, iou)
|
|
"""
|
|
files = set()
|
|
paths = []
|
|
for directory in images_directories(type):
|
|
for root, _, filenames in os.walk(directory):
|
|
for file in filenames:
|
|
path = os.path.join(root, file)
|
|
if file not in files:
|
|
if (file.endswith(".image") and type == "dynamips") \
|
|
or (file.endswith(".bin") and type == "iou") \
|
|
or (not file.endswith(".bin") and not file.endswith(".image") and type == "qemu"):
|
|
files.add(file)
|
|
paths.append(path)
|
|
return paths
|
|
|
|
|
|
def images_directories(type):
|
|
"""
|
|
Return all directory where we will look for images
|
|
by priority
|
|
|
|
:param type: Type of emulator
|
|
"""
|
|
server_config = Config.instance().get_section_config("Server")
|
|
|
|
paths = []
|
|
img_dir = os.path.expanduser(server_config.get("images_path", "~/GNS3/images"))
|
|
if type == "qemu":
|
|
type_img_directory = os.path.join(img_dir, "QEMU")
|
|
elif type == "iou":
|
|
type_img_directory = os.path.join(img_dir, "IOU")
|
|
elif type == "dynamips":
|
|
type_img_directory = os.path.join(img_dir, "IOS")
|
|
else:
|
|
raise NotImplementedError("%s is not supported", type)
|
|
os.makedirs(type_img_directory, exist_ok=True)
|
|
paths.append(type_img_directory)
|
|
for directory in server_config.get("additional_images_path", "").split(":"):
|
|
paths.append(directory)
|
|
# Compatibility with old topologies we look in parent directory
|
|
paths.append(img_dir)
|
|
# Return only the existings paths
|
|
return [force_unix_path(p) for p in paths if os.path.exists(p)]
|
|
|
|
|
|
def md5sum(path):
|
|
"""
|
|
Return the md5sum of an image and cache it on disk
|
|
|
|
:param path: Path to the image
|
|
:returns: Digest of the image
|
|
"""
|
|
|
|
if path is None or len(path) == 0 or not os.path.exists(path):
|
|
return None
|
|
|
|
try:
|
|
with open(path + '.md5sum') as f:
|
|
return f.read()
|
|
except OSError:
|
|
pass
|
|
|
|
try:
|
|
m = hashlib.md5()
|
|
with open(path, 'rb') as f:
|
|
while True:
|
|
buf = f.read(128)
|
|
if not buf:
|
|
break
|
|
m.update(buf)
|
|
digest = m.hexdigest()
|
|
except OSError as e:
|
|
log.error("Can't create digest of %s: %s", path, str(e))
|
|
return None
|
|
|
|
try:
|
|
with open('{}.md5sum'.format(path), 'w+') as f:
|
|
f.write(digest)
|
|
except OSError as e:
|
|
log.error("Can't write digest of %s: %s", path, str(e))
|
|
|
|
return digest
|
|
|
|
|
|
def remove_checksum(path):
|
|
"""
|
|
Remove the checksum of an image from cache if exists
|
|
"""
|
|
|
|
path = '{}.md5sum'.format(path)
|
|
if os.path.exists(path):
|
|
os.remove(path)
|