mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-15 12:59:06 +00:00
127 lines
3.7 KiB
Python
127 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2014 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 hashlib
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from ..config import Config
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from . import force_unix_path
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import logging
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log = logging.getLogger(__name__)
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def scan_for_images(type):
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"""
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Scan directories for available image for a type
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:param type: emulator type (dynamips, qemu, iou)
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"""
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files = set()
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paths = []
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for directory in images_directories(type):
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for root, _, filenames in os.walk(directory):
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for file in filenames:
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path = os.path.join(root, file)
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if file not in files:
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if (file.endswith(".image") and type == "dynamips") \
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or (file.endswith(".bin") and type == "iou") \
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or (not file.endswith(".bin") and not file.endswith(".image") and type == "qemu"):
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files.add(file)
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paths.append(path)
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return paths
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def images_directories(type):
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"""
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Return all directory where we will look for images
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by priority
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:param type: Type of emulator
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"""
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server_config = Config.instance().get_section_config("Server")
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paths = []
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img_dir = os.path.expanduser(server_config.get("images_path", "~/GNS3/images"))
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if type == "qemu":
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type_img_directory = os.path.join(img_dir, "QEMU")
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elif type == "iou":
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type_img_directory = os.path.join(img_dir, "IOU")
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elif type == "dynamips":
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type_img_directory = os.path.join(img_dir, "IOS")
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else:
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raise NotImplementedError("%s is not supported", type)
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os.makedirs(type_img_directory, exist_ok=True)
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paths.append(type_img_directory)
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for directory in server_config.get("additional_images_path", "").split(":"):
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paths.append(directory)
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# Compatibility with old topologies we look in parent directory
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paths.append(img_dir)
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# Return only the existings paths
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return [force_unix_path(p) for p in paths if os.path.exists(p)]
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def md5sum(path):
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"""
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Return the md5sum of an image and cache it on disk
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:param path: Path to the image
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:returns: Digest of the image
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"""
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if path is None or len(path) == 0 or not os.path.exists(path):
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return None
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try:
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with open(path + '.md5sum') as f:
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return f.read()
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except OSError:
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pass
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try:
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m = hashlib.md5()
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with open(path, 'rb') as f:
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while True:
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buf = f.read(128)
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if not buf:
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break
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m.update(buf)
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digest = m.hexdigest()
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except OSError as e:
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log.error("Can't create digest of %s: %s", path, str(e))
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return None
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try:
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with open('{}.md5sum'.format(path), 'w+') as f:
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f.write(digest)
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except OSError as e:
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log.error("Can't write digest of %s: %s", path, str(e))
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return digest
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def remove_checksum(path):
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"""
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Remove the checksum of an image from cache if exists
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"""
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path = '{}.md5sum'.format(path)
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if os.path.exists(path):
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os.remove(path)
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