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maven_artifact: download with shutil.copyfileobj to a temp file (#44956)

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* maven_artifact: replace homemade chunked download with shutil.copyfileobj

* maven_artifact: copy to temp file first
This commit is contained in:
S. Veyrié 2018-08-31 13:35:26 +02:00 committed by ansibot
parent b0d6867fbb
commit 5b358db83f
1 changed files with 29 additions and 45 deletions
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74
lib/ansible/modules/packaging/language/maven_artifact.py
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@ -158,9 +158,9 @@ EXAMPLES = '''
import hashlib import hashlib
import os import os
import posixpath import posixpath
import sys
import shutil import shutil
import io import io
import tempfile
try: try:
from lxml import etree from lxml import etree
@ -371,56 +371,40 @@ class MavenDownloader:
raise ValueError(failmsg + " because of " + info['msg'] + "for URL " + url_to_use) raise ValueError(failmsg + " because of " + info['msg'] + "for URL " + url_to_use)
return None return None
def download(self, artifact, verify_download, filename=None): def download(self, tmpdir, artifact, verify_download, filename=None):
filename = artifact.get_filename(filename)
if not artifact.version or artifact.version == "latest": if not artifact.version or artifact.version == "latest":
artifact = Artifact(artifact.group_id, artifact.artifact_id, self.find_latest_version_available(artifact), artifact = Artifact(artifact.group_id, artifact.artifact_id, self.find_latest_version_available(artifact),
artifact.classifier, artifact.extension) artifact.classifier, artifact.extension)
url = self.find_uri_for_artifact(artifact) url = self.find_uri_for_artifact(artifact)
if self.local: tempfd, tempname = tempfile.mkstemp(dir=tmpdir)
parsed_url = urlparse(url)
if os.path.isfile(parsed_url.path): try:
shutil.copy2(parsed_url.path, filename) # copy to temp file
if self.local:
parsed_url = urlparse(url)
if os.path.isfile(parsed_url.path):
shutil.copy2(parsed_url.path, tempname)
else:
return "Can not find local file: " + parsed_url.path
else: else:
return "Can not find local file: " + parsed_url.path response = self._request(url, "Failed to download artifact " + str(artifact))
else: with os.fdopen(tempfd, 'wb') as f:
response = self._request(url, "Failed to download artifact " + str(artifact)) shutil.copyfileobj(response, f)
with io.open(filename, 'wb') as f:
self._write_chunks(response, f, report_hook=self.chunk_report) if verify_download:
if verify_download: invalid_md5 = self.is_invalid_md5(tempname, url)
invalid_md5 = self.is_invalid_md5(filename, url) if invalid_md5:
if invalid_md5: # if verify_change was set, the previous file would be deleted
# if verify_change was set, the previous file would be deleted os.remove(tempname)
os.remove(filename) return invalid_md5
return invalid_md5 except Exception as e:
os.remove(tempname)
raise e
# all good, now copy temp file to target
shutil.move(tempname, artifact.get_filename(filename))
return None return None
def chunk_report(self, bytes_so_far, chunk_size, total_size):
percent = float(bytes_so_far) / total_size
percent = round(percent * 100, 2)
sys.stdout.write("Downloaded %d of %d bytes (%0.2f%%)\r" %
(bytes_so_far, total_size, percent))
if bytes_so_far >= total_size:
sys.stdout.write('\n')
def _write_chunks(self, response, filehandle, chunk_size=8192, report_hook=None):
total_size = response.info().get('Content-Length').strip()
total_size = int(total_size)
bytes_so_far = 0
while True:
chunk = response.read(chunk_size)
bytes_so_far += len(chunk)
if not chunk:
break
filehandle.write(chunk)
if report_hook:
report_hook(bytes_so_far, chunk_size, total_size)
return bytes_so_far
def is_invalid_md5(self, file, remote_url): def is_invalid_md5(self, file, remote_url):
if os.path.exists(file): if os.path.exists(file):
local_md5 = self._local_md5(file) local_md5 = self._local_md5(file)
@ -546,7 +530,7 @@ def main():
if prev_state == "absent": if prev_state == "absent":
try: try:
download_error = downloader.download(artifact, verify_download, b_dest) download_error = downloader.download(module.tmpdir, artifact, verify_download, b_dest)
if download_error is None: if download_error is None:
changed = True changed = True
else: else: