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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1725446412; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UpU2+/M58mm5T33rWo0QnRPqyX8ullh5Ml7wF7nd7NI=; b=N9U9dYVbTYwuS6caND3bLwglSBMDz2JPO9Oex+2ACA3LSsnXLS7Et6JrB6RnjlohaO1Ddq b9rXWwlBOVzv5DWNa+NKHYplmnc4/TUYW3HMCkPHZw6Jg1rEWCQ1XYONp4NFlbjPZuwNnA p59iCt60nT/Y6gSLREoXlfKT88Vy0Es= X-MC-Unique: CaEDuh2tMiqUQdM4w2gfog-1 From: Thomas Huth To: qemu-devel@nongnu.org Cc: Richard Henderson , Stefan Hajnoczi , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 14/42] tests/functional: add a module for handling asset download & caching Date: Wed, 4 Sep 2024 12:38:49 +0200 Message-ID: <20240904103923.451847-15-thuth@redhat.com> In-Reply-To: <20240904103923.451847-1-thuth@redhat.com> References: <20240904103923.451847-1-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; 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Berrang=C3=A9 The 'Asset' class is a simple module that declares a downloadable asset that can be cached locally. Downloads are stored in the user's home dir at ~/.cache/qemu/download, using a sha256 sum of the URL. [thuth: Drop sha1 support, use hash on file content for naming instead of U= RL, add the possibility to specify the cache dir via environment variab= le] Signed-off-by: Daniel P. Berrang=C3=A9 Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 Message-ID: <20240830133841.142644-15-thuth@redhat.com> Signed-off-by: Thomas Huth --- tests/functional/qemu_test/__init__.py | 1 + tests/functional/qemu_test/asset.py | 97 ++++++++++++++++++++++++++ 2 files changed, 98 insertions(+) create mode 100644 tests/functional/qemu_test/asset.py diff --git a/tests/functional/qemu_test/__init__.py b/tests/functional/qemu= _test/__init__.py index 2f1e0bc70d..db05c8f412 100644 --- a/tests/functional/qemu_test/__init__.py +++ b/tests/functional/qemu_test/__init__.py @@ -6,6 +6,7 @@ # later. See the COPYING file in the top-level directory. =20 =20 +from .asset import Asset from .config import BUILD_DIR from .cmd import has_cmd, has_cmds, run_cmd, is_readable_executable_file, \ interrupt_interactive_console_until_pattern, wait_for_console_pattern,= \ diff --git a/tests/functional/qemu_test/asset.py b/tests/functional/qemu_te= st/asset.py new file mode 100644 index 0000000000..c0e675d847 --- /dev/null +++ b/tests/functional/qemu_test/asset.py @@ -0,0 +1,97 @@ +# 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 =3D url + self.hash =3D hashsum + cache_dir_env =3D os.getenv('QEMU_TEST_CACHE_DIR') + if cache_dir_env: + self.cache_dir =3D Path(cache_dir_env, "download") + else: + self.cache_dir =3D Path(Path("~").expanduser(), + ".cache", "qemu", "download") + self.cache_file =3D Path(self.cache_dir, hashsum) + self.log =3D logging.getLogger('qemu-test') + + def __repr__(self): + return "Asset: url=3D%s hash=3D%s cache=3D%s" % ( + self.url, self.hash, self.cache_file) + + def _check(self, cache_file): + if self.hash is None: + return True + if len(self.hash) =3D=3D 64: + sum_prog =3D 'sha256sum' + elif len(self.hash) =3D=3D 128: + sum_prog =3D 'sha512sum' + else: + raise Exception("unknown hash type") + + checksum =3D subprocess.check_output( + [sum_prog, str(cache_file)]).split()[0] + return self.hash =3D=3D 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=3DTrue, exist_ok=3DTrue) + + 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 =3D self.cache_file.with_suffix(".download") + + try: + resp =3D 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) --=20 2.46.0