50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
"""
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Copyright 2017 Oliver Smith
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This file is part of pmbootstrap.
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pmbootstrap 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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pmbootstrap 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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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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import os
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import hashlib
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import shutil
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import logging
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import urllib.request
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import pmb.helpers.run
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def download(args, url, prefix, cache=True):
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"""
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Download a file to disk.
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"""
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# Create cache folder
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if not os.path.exists(args.work + "/cache_http"):
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pmb.helpers.run.user(args, ["mkdir", "-p", args.work + "/cache_http"])
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# Check if file exists in cache
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prefix = prefix.replace("/", "_")
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path = (args.work + "/cache_http/" + prefix + "_" +
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hashlib.sha256(url.encode("utf-8")).hexdigest())
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if os.path.exists(path):
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if cache:
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return path
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pmb.helpers.run.user(args, ["rm", path])
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# Download the file
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logging.info("Download " + url)
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with urllib.request.urlopen(url) as response:
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with open(path, "wb") as handle:
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shutil.copyfileobj(response, handle)
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return path
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