odin-lang.Odin/tests/core/download_assets.py

#!/usr/bin/env python3
import urllib.request
import shutil
import sys
import os
import zipfile
import hashlib
import hmac

TEST_SUITES        = ['PNG', 'XML']
DOWNLOAD_BASE_PATH = "assets/{}"
ASSETS_BASE_URL    = "https://raw.githubusercontent.com/odin-lang/test-assets/master/{}/{}"
HMAC_KEY           = "https://odin-lang.org"
HMAC_HASH          = hashlib.sha3_512
HMAC_DIGESTS = {
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	'xs7n0g01.png': "03dab5037599a58f25dcbd1be556ff60dba08ed3e0e92e5791c53e98041b0ef174a9ebdf75fd997696521ca96a19ca1bb9a5eff929f1a7c0dc1a7d3598d07d04",
	'z00n2c08.png': "9a65f94ebb3614b65e093534a7763f55687144fc9a82e2680e7cad9863d72947a0de3dfe57468e11b578234b8460485e8ee895c681c391d140d84b15c7a40f41",
	'z03n2c08.png': "847fd249d190ccd8ec54afc910afaecf007db7ea5753c18eec8de654b159f4cdf99b70bdd55ec276ce5340fd2ede5290468fe4c6029b5e4c0825ca881a75bde3",
	'z06n2c08.png': "94268c1998de1f4304d24219e31175def7375cc26e2bbfc7d1ac20465a42fae49bcc8ff7626873138b537588e8bce21b6d5e1373efaade1f83cae455334074aa",
	'z09n2c08.png': "3cbb1bb58d78ecc9dd5568a8e9093ba020b63449ef3ab102f98fac4220fc9619feaa873336a25f3c1ad99cfb3e5d32bcfe52d966bc8640d1d5ba4e061741743e",

	'unicode.xml':  "e0cdc94f07fdbb15eea811ed2ae6dcf494a83d197dafe6580c740270feb0d8f5f7146d4a7d4c2d2ea25f8bd9678bc986123484b39399819a6b7262687959d1ae",
}

def try_download_file(url, out_file):
	try:
		with urllib.request.urlopen(url) as response, open(out_file, 'wb') as of:
			shutil.copyfileobj(response, of)
	except urllib.error.HTTPError:
	 	print("Could not download", url)
	 	return 1	

def try_download_and_unpack_zip(suite):
	url      = ASSETS_BASE_URL.format(suite, "{}.zip".format(suite))
	out_file = DOWNLOAD_BASE_PATH.format(suite) + "/{}.zip".format(suite)

	print("\tDownloading {} to {}".format(url, out_file))

	if try_download_file(url, out_file) is not None:
		print("Could not download ZIP file")
		return 1

	# Try opening the ZIP file and extracting the test images
	#try:
	with zipfile.ZipFile(out_file) as z:
		print("\tUnpacking and verifying using HMAC(\"{}\", data, {}):\n".format(HMAC_KEY, HMAC_HASH.__name__))
		for file in z.filelist:
			if file.filename not in HMAC_DIGESTS:
				print("Missing digest for {}".format(file.filename))
				return 3

			extract_path = DOWNLOAD_BASE_PATH.format(suite)
			z.extract(file, extract_path)

			file_path = "{}/{}".format(extract_path, file.filename)

			with open(file_path, "rb") as f:
				file_data = f.read()
				digest = hashlib.sha3_512(file_data).hexdigest()

				hmac_digest = hmac.new(HMAC_KEY.encode(), file_data, HMAC_HASH).hexdigest()
				print("{} *{}".format(hmac_digest, file.filename))
				if not hmac.compare_digest(hmac_digest, HMAC_DIGESTS[file.filename]):
				 	print("FAIL! Expected: {}".format(HMAC_DIGESTS[file.filename]))
				 	return 4

	#except:
	#	print("Could not extract ZIP file")
	#	return 2

def main():
	for suite in TEST_SUITES:
		print("Downloading {} assets".format(suite))

		# Make assets path
		try:
			path = DOWNLOAD_BASE_PATH.format(suite)
			os.makedirs(path)
		except FileExistsError:
			pass

		# Try downloading and unpacking the assets
		r = try_download_and_unpack_zip(suite)
		if r is not None:
			return r

		# We could fall back on downloading the PNG files individually, but it's slow
		print("\nDone downloading {} assets.".format(suite))

	return 0

if __name__ == '__main__':
	sys.exit(main())