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@@ -5,16 +5,81 @@ import urllib.request |
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import urllib.error
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import contextlib
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import shutil
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+import netrc
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from buildstream import Source, SourceError, Consistency
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from buildstream import utils
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+class NetrcFTPOpener(urllib.request.FTPHandler):
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+
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+ def __init__(self, netrc_config):
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+ self.netrc = netrc_config
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+
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+ def _split(self, netloc):
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+ userpass, hostport = urllib.parse.splituser(netloc)
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+ host, port = urllib.parse.splitport(hostport)
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+ if userpass:
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+ user, passwd = urllib.parse.splitpasswd(userpass)
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+ else:
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+ user = ''
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+ passwd = ''
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+ return host, port, user, passwd
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+
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+ def _unsplit(self, host, port, user, passwd):
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+ if port:
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+ host = '{}:{}'.format(host, port)
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+ if user:
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+ if passwd:
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+ user = '{}:{}'.format(user, passwd)
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+ host = '{}@{}'.format(user, host)
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+
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+ return host
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+
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+ def ftp_open(self, req):
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+ host, port, user, passwd = self._split(req.host)
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+
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+ if (not user or not passwd) and self.netrc:
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+ entry = self.netrc.authenticators(host)
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+ if entry:
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+ entry_login, _, entry_password = entry
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+ if not user:
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+ user = entry_login
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+ if not passwd:
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+ passwd = entry_password
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+
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+ req.host = self._unsplit(host, port, user, passwd)
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+
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+ return super().ftp_open(req)
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+
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+
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+class NetrcPasswordManager:
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+
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+ def __init__(self, netrc_config):
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+ self.netrc = netrc_config
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+
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+ def add_password(self, realm, uri, user, passwd):
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+ pass
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+
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+ def find_user_password(self, realm, authuri):
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+ if not self.netrc:
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+ return None, None
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+ parts = urllib.parse.urlsplit(authuri)
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+ entry = self.netrc.authenticators(parts.hostname)
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+ if not entry:
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+ return None, None
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+ else:
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+ login, _, password = entry
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+ return login, password
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+
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+
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class DownloadableFileSource(Source):
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# pylint: disable=attribute-defined-outside-init
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COMMON_CONFIG_KEYS = Source.COMMON_CONFIG_KEYS + ['url', 'ref', 'etag']
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+ __urlopener = None
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+
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def configure(self, node):
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self.original_url = self.node_get_member(node, str, 'url')
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self.ref = self.node_get_member(node, str, 'ref', None)
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@@ -118,7 +183,8 @@ class DownloadableFileSource(Source): |
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if etag and self.get_consistency() == Consistency.CACHED:
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request.add_header('If-None-Match', etag)
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- with contextlib.closing(urllib.request.urlopen(request)) as response:
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+ opener = self.__get_urlopener()
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+ with contextlib.closing(opener.open(request)) as response:
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info = response.info()
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etag = info['ETag'] if 'ETag' in info else None
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@@ -164,3 +230,19 @@ class DownloadableFileSource(Source): |
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def _get_mirror_file(self, sha=None):
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return os.path.join(self._get_mirror_dir(), sha or self.ref)
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+
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+ def __get_urlopener(self):
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+ if not DownloadableFileSource.__urlopener:
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+ try:
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+ netrc_config = netrc.netrc()
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+ except FileNotFoundError:
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+ _urlopener = urllib.request.build_opener()
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+ except netrc.NetrcParseError as e:
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+ self.warn('{}: While reading .netrc: {}'.format(self, e))
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+ return urllib.request.build_opener()
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+ else:
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+ netrc_pw_mgr = NetrcPasswordManager(netrc_config)
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+ http_auth = urllib.request.HTTPBasicAuthHandler(netrc_pw_mgr)
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+ ftp_handler = NetrcFTPOpener(netrc_config)
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+ DownloadableFileSource.__urlopener = urllib.request.build_opener(http_auth, ftp_handler)
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+ return DownloadableFileSource.__urlopener
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