Lib/nturl2path.py

   1 """Convert a NT pathname to a file URL and vice versa."""
   2
   3 def url2pathname(url):
   4     """OS-specific conversion from a relative URL of the 'file' scheme
   5     to a file system path; not recommended for general use."""
   6     # e.g.
   7     # ///C|/foo/bar/spam.foo
   8     # becomes
   9     # C:\foo\bar\spam.foo
  10     import string, urllib.parse
  11     # Windows itself uses ":" even in URLs.
  12     url = url.replace(':', '|')
  13     if not '|' in url:
  14         # No drive specifier, just convert slashes
  15         if url[:4] == '////':
  16             # path is something like ////host/path/on/remote/host
  17             # convert this to \\host\path\on\remote\host
  18             # (notice halving of slashes at the start of the path)
  19             url = url[2:]
  20         components = url.split('/')
  21         # make sure not to convert quoted slashes :-)
  22         return urllib.parse.unquote('\\'.join(components))
  23     comp = url.split('|')
  24     if len(comp) != 2 or comp[0][-1] not in string.ascii_letters:
  25         error = 'Bad URL: ' + url
  26         raise IOError(error)
  27     drive = comp[0][-1].upper()
  28     components = comp[1].split('/')
  29     path = drive + ':'
  30     for  comp in components:
  31         if comp:
  32             path = path + '\\' + urllib.parse.unquote(comp)
  33     return path
  34
  35 def pathname2url(p):
  36     """OS-specific conversion from a file system path to a relative URL
  37     of the 'file' scheme; not recommended for general use."""
  38     # e.g.
  39     # C:\foo\bar\spam.foo
  40     # becomes
  41     # ///C|/foo/bar/spam.foo
  42     import urllib.parse
  43     if not ':' in p:
  44         # No drive specifier, just convert slashes and quote the name
  45         if p[:2] == '\\\\':
  46         # path is something like \\host\path\on\remote\host
  47         # convert this to ////host/path/on/remote/host
  48         # (notice doubling of slashes at the start of the path)
  49             p = '\\\\' + p
  50         components = p.split('\\')
  51         return urllib.parse.quote('/'.join(components))
  52     comp = p.split(':')
  53     if len(comp) != 2 or len(comp[0]) > 1:
  54         error = 'Bad path: ' + p
  55         raise IOError(error)
  56
  57     drive = urllib.parse.quote(comp[0].upper())
  58     components = comp[1].split('\\')
  59     path = '///' + drive + ':'
  60     for comp in components:
  61         if comp:
  62             path = path + '/' + urllib.parse.quote(comp)
  63     return path