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69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
"""riscos specific module for conversion between pathnames and URLs.
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Based on macurl2path.
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Do not import directly, use urllib instead."""
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import string
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import urllib
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import os
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__all__ = ["url2pathname","pathname2url"]
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__slash_dot = string.maketrans("/.", "./")
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def url2pathname(url):
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"Convert URL to a RISC OS path."
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tp = urllib.splittype(url)[0]
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if tp and tp <> 'file':
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raise RuntimeError, 'Cannot convert non-local URL to pathname'
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# Turn starting /// into /, an empty hostname means current host
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if url[:3] == '///':
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url = url[2:]
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elif url[:2] == '//':
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raise RuntimeError, 'Cannot convert non-local URL to pathname'
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components = string.split(url, '/')
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if not components[0]:
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if '$' in components:
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del components[0]
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else:
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components[0] = '$'
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# Remove . and embedded ..
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i = 0
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while i < len(components):
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if components[i] == '.':
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del components[i]
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elif components[i] == '..' and i > 0 and \
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components[i-1] not in ('', '..'):
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del components[i-1:i+1]
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i -= 1
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elif components[i] == '..':
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components[i] = '^'
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i += 1
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elif components[i] == '' and i > 0 and components[i-1] <> '':
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del components[i]
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else:
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i += 1
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components = map(lambda x: urllib.unquote(x).translate(__slash_dot), components)
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return '.'.join(components)
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def pathname2url(pathname):
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"Convert a RISC OS path name to a file url."
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return urllib.quote('///' + pathname.translate(__slash_dot), "/$:")
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def test():
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for url in ["index.html",
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"/SCSI::SCSI4/$/Anwendung/Comm/Apps/!Fresco/Welcome",
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"/SCSI::SCSI4/$/Anwendung/Comm/Apps/../!Fresco/Welcome",
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"../index.html",
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"bar/index.html",
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"/foo/bar/index.html",
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"/foo/bar/",
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"/"]:
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print '%r -> %r' % (url, url2pathname(url))
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print "*******************************************************"
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for path in ["SCSI::SCSI4.$.Anwendung",
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"PythonApp:Lib",
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"PythonApp:Lib.rourl2path/py"]:
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print '%r -> %r' % (path, pathname2url(path))
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if __name__ == '__main__':
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test()
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