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"""RAPI users config file parser.
"""
import errno
import logging
from ganeti import utils
class PasswordFileUser(object):
"""Data structure for users from password file.
"""
def __init__(self, name, password, options):
self.name = name
self.password = password
self.options = options
def ParsePasswordFile(contents):
"""Parses the contents of a password file.
Lines in the password file are of the following format::
<username> <password> [options]
Fields are separated by whitespace. Username and password are mandatory,
options are optional and separated by comma (','). Empty lines and comments
('#') are ignored.
@type contents: str
@param contents: Contents of password file
@rtype: dict
@return: Dictionary containing L{PasswordFileUser} instances
"""
users = {}
for line in utils.FilterEmptyLinesAndComments(contents):
parts = line.split(None, 2)
if len(parts) < 2:
# Invalid line
# TODO: Return line number from FilterEmptyLinesAndComments
logging.warning("Ignoring non-comment line with less than two fields")
continue
name = parts[0]
password = parts[1]
# Extract options
options = []
if len(parts) >= 3:
for part in parts[2].split(","):
options.append(part.strip())
else:
logging.warning("Ignoring values for user '%s': %s", name, parts[3:])
users[name] = PasswordFileUser(name, password, options)
return users
class RapiUsers(object):
def __init__(self):
"""Initializes this class.
"""
self._users = None
def Get(self, username):
"""Checks whether a user exists.
"""
if self._users:
return self._users.get(username, None)
else:
return None
def Load(self, filename):
"""Loads a file containing users and passwords.
@type filename: string
@param filename: Path to file
"""
logging.info("Reading users file at %s", filename)
try:
try:
contents = utils.ReadFile(filename)
except EnvironmentError, err:
self._users = None
if err.errno == errno.ENOENT:
logging.warning("No users file at %s", filename)
else:
logging.warning("Error while reading %s: %s", filename, err)
return False
users = ParsePasswordFile(contents)
except Exception, err: # pylint: disable=W0703
# We don't care about the type of exception
logging.error("Error while parsing %s: %s", filename, err)
return False
self._users = users
return True