Lib/plat-riscos/rourl2path.py

   1 """riscos specific module for conversion between pathnames and URLs.
   2 Based on macurl2path.
   3 Do not import directly, use urllib instead."""
   4
   5 import string
   6 import urllib
   7 import os
   8
   9 __all__ = ["url2pathname","pathname2url"]
  10
  11 __slash_dot = string.maketrans("/.", "./")
  12
  13 def url2pathname(url):
  14     """OS-specific conversion from a relative URL of the 'file' scheme
  15     to a file system path; not recommended for general use."""
  16     tp = urllib.splittype(url)[0]
  17     if tp and tp <> 'file':
  18         raise RuntimeError, 'Cannot convert non-local URL to pathname'
  19     # Turn starting /// into /, an empty hostname means current host
  20     if url[:3] == '///':
  21         url = url[2:]
  22     elif url[:2] == '//':
  23         raise RuntimeError, 'Cannot convert non-local URL to pathname'
  24     components = string.split(url, '/')
  25     if not components[0]:
  26         if '$' in components:
  27             del components[0]
  28         else:
  29             components[0] = '$'
  30     # Remove . and embedded ..
  31     i = 0
  32     while i < len(components):
  33         if components[i] == '.':
  34             del components[i]
  35         elif components[i] == '..' and i > 0 and \
  36                                   components[i-1] not in ('', '..'):
  37             del components[i-1:i+1]
  38             i -= 1
  39         elif components[i] == '..':
  40             components[i] = '^'
  41             i += 1
  42         elif components[i] == '' and i > 0 and components[i-1] <> '':
  43             del components[i]
  44         else:
  45             i += 1
  46     components = map(lambda x: urllib.unquote(x).translate(__slash_dot), components)
  47     return '.'.join(components)
  48
  49 def pathname2url(pathname):
  50     """OS-specific conversion from a file system path to a relative URL
  51     of the 'file' scheme; not recommended for general use."""
  52     return urllib.quote('///' + pathname.translate(__slash_dot), "/$:")
  53
  54 def test():
  55     for url in ["index.html",
  56                 "/SCSI::SCSI4/$/Anwendung/Comm/Apps/!Fresco/Welcome",
  57                 "/SCSI::SCSI4/$/Anwendung/Comm/Apps/../!Fresco/Welcome",
  58                 "../index.html",
  59                 "bar/index.html",
  60                 "/foo/bar/index.html",
  61                 "/foo/bar/",
  62                 "/"]:
  63         print '%r -> %r' % (url, url2pathname(url))
  64     print "*******************************************************"
  65     for path in ["SCSI::SCSI4.$.Anwendung",
  66                  "PythonApp:Lib",
  67                  "PythonApp:Lib.rourl2path/py"]:
  68         print '%r -> %r' % (path, pathname2url(path))
  69
  70 if __name__ == '__main__':
  71     test()