1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
# Test utilities for fetching & caching assets
#
# Copyright 2024 Red Hat, Inc.
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
import hashlib
import logging
import os
import subprocess
import urllib.request
from pathlib import Path
from shutil import copyfileobj
# Instances of this class must be declared as class level variables
# starting with a name "ASSET_". This enables the pre-caching logic
# to easily find all referenced assets and download them prior to
# execution of the tests.
class Asset:
def __init__(self, url, hashsum):
self.url = url
self.hash = hashsum
cache_dir_env = os.getenv('QEMU_TEST_CACHE_DIR')
if cache_dir_env:
self.cache_dir = Path(cache_dir_env, "download")
else:
self.cache_dir = Path(Path("~").expanduser(),
".cache", "qemu", "download")
self.cache_file = Path(self.cache_dir, hashsum)
self.log = logging.getLogger('qemu-test')
def __repr__(self):
return "Asset: url=%s hash=%s cache=%s" % (
self.url, self.hash, self.cache_file)
def _check(self, cache_file):
if self.hash is None:
return True
if len(self.hash) == 64:
sum_prog = 'sha256sum'
elif len(self.hash) == 128:
sum_prog = 'sha512sum'
else:
raise Exception("unknown hash type")
checksum = subprocess.check_output(
[sum_prog, str(cache_file)]).split()[0]
return self.hash == checksum.decode("utf-8")
def valid(self):
return self.cache_file.exists() and self._check(self.cache_file)
def fetch(self):
if not self.cache_dir.exists():
self.cache_dir.mkdir(parents=True, exist_ok=True)
if self.valid():
self.log.debug("Using cached asset %s for %s",
self.cache_file, self.url)
return str(self.cache_file)
self.log.info("Downloading %s to %s...", self.url, self.cache_file)
tmp_cache_file = self.cache_file.with_suffix(".download")
try:
resp = urllib.request.urlopen(self.url)
except Exception as e:
self.log.error("Unable to download %s: %s", self.url, e)
raise
try:
with tmp_cache_file.open("wb+") as dst:
copyfileobj(resp, dst)
except:
tmp_cache_file.unlink()
raise
try:
# Set these just for informational purposes
os.setxattr(str(tmp_cache_file), "user.qemu-asset-url",
self.url.encode('utf8'))
os.setxattr(str(tmp_cache_file), "user.qemu-asset-hash",
self.hash.encode('utf8'))
except Exception as e:
self.log.debug("Unable to set xattr on %s: %s", tmp_cache_file, e)
pass
if not self._check(tmp_cache_file):
tmp_cache_file.unlink()
raise Exception("Hash of %s does not match %s" %
(self.url, self.hash))
tmp_cache_file.replace(self.cache_file)
self.log.info("Cached %s at %s" % (self.url, self.cache_file))
return str(self.cache_file)
|
