| """An object-oriented interface to .netrc files.""" |
| |
| # Module and documentation by Eric S. Raymond, 21 Dec 1998 |
| |
| import os, shlex |
| |
| __all__ = ["netrc", "NetrcParseError"] |
| |
| |
| class NetrcParseError(Exception): |
| """Exception raised on syntax errors in the .netrc file.""" |
| def __init__(self, msg, filename=None, lineno=None): |
| self.filename = filename |
| self.lineno = lineno |
| self.msg = msg |
| Exception.__init__(self, msg) |
| |
| def __str__(self): |
| return "%s (%s, line %s)" % (self.msg, self.filename, self.lineno) |
| |
| |
| class netrc: |
| def __init__(self, file=None): |
| if file is None: |
| try: |
| file = os.path.join(os.environ['HOME'], ".netrc") |
| except KeyError: |
| raise IOError("Could not find .netrc: $HOME is not set") |
| self.hosts = {} |
| self.macros = {} |
| with open(file) as fp: |
| self._parse(file, fp) |
| |
| def _parse(self, file, fp): |
| lexer = shlex.shlex(fp) |
| lexer.wordchars += r"""!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~""" |
| lexer.commenters = lexer.commenters.replace('#', '') |
| while 1: |
| # Look for a machine, default, or macdef top-level keyword |
| toplevel = tt = lexer.get_token() |
| if not tt: |
| break |
| elif tt[0] == '#': |
| # seek to beginning of comment, in case reading the token put |
| # us on a new line, and then skip the rest of the line. |
| pos = len(tt) + 1 |
| lexer.instream.seek(-pos, 1) |
| lexer.instream.readline() |
| continue |
| elif tt == 'machine': |
| entryname = lexer.get_token() |
| elif tt == 'default': |
| entryname = 'default' |
| elif tt == 'macdef': # Just skip to end of macdefs |
| entryname = lexer.get_token() |
| self.macros[entryname] = [] |
| lexer.whitespace = ' \t' |
| while 1: |
| line = lexer.instream.readline() |
| if not line or line == '\012': |
| lexer.whitespace = ' \t\r\n' |
| break |
| self.macros[entryname].append(line) |
| continue |
| else: |
| raise NetrcParseError( |
| "bad toplevel token %r" % tt, file, lexer.lineno) |
| |
| # We're looking at start of an entry for a named machine or default. |
| login = '' |
| account = password = None |
| self.hosts[entryname] = {} |
| while 1: |
| tt = lexer.get_token() |
| if (tt.startswith('#') or |
| tt in {'', 'machine', 'default', 'macdef'}): |
| if password: |
| self.hosts[entryname] = (login, account, password) |
| lexer.push_token(tt) |
| break |
| else: |
| raise NetrcParseError( |
| "malformed %s entry %s terminated by %s" |
| % (toplevel, entryname, repr(tt)), |
| file, lexer.lineno) |
| elif tt == 'login' or tt == 'user': |
| login = lexer.get_token() |
| elif tt == 'account': |
| account = lexer.get_token() |
| elif tt == 'password': |
| password = lexer.get_token() |
| else: |
| raise NetrcParseError("bad follower token %r" % tt, |
| file, lexer.lineno) |
| |
| def authenticators(self, host): |
| """Return a (user, account, password) tuple for given host.""" |
| if host in self.hosts: |
| return self.hosts[host] |
| elif 'default' in self.hosts: |
| return self.hosts['default'] |
| else: |
| return None |
| |
| def __repr__(self): |
| """Dump the class data in the format of a .netrc file.""" |
| rep = "" |
| for host in self.hosts.keys(): |
| attrs = self.hosts[host] |
| rep = rep + "machine "+ host + "\n\tlogin " + repr(attrs[0]) + "\n" |
| if attrs[1]: |
| rep = rep + "account " + repr(attrs[1]) |
| rep = rep + "\tpassword " + repr(attrs[2]) + "\n" |
| for macro in self.macros.keys(): |
| rep = rep + "macdef " + macro + "\n" |
| for line in self.macros[macro]: |
| rep = rep + line |
| rep = rep + "\n" |
| return rep |
| |
| if __name__ == '__main__': |
| print netrc() |
