| 1 | """Macintosh-specific module for conversion between pathnames and URLs.
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| 2 |
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| 3 | Do not import directly; use urllib instead."""
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| 4 |
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| 5 | import urllib
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| 6 | import os
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| 7 |
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| 8 | __all__ = ["url2pathname","pathname2url"]
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| 9 |
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| 10 | def url2pathname(pathname):
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| 11 | """OS-specific conversion from a relative URL of the 'file' scheme
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| 12 | to a file system path; not recommended for general use."""
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| 13 | #
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| 14 | # XXXX The .. handling should be fixed...
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| 15 | #
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| 16 | tp = urllib.splittype(pathname)[0]
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| 17 | if tp and tp != 'file':
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| 18 | raise RuntimeError, 'Cannot convert non-local URL to pathname'
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| 19 | # Turn starting /// into /, an empty hostname means current host
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| 20 | if pathname[:3] == '///':
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| 21 | pathname = pathname[2:]
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| 22 | elif pathname[:2] == '//':
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| 23 | raise RuntimeError, 'Cannot convert non-local URL to pathname'
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| 24 | components = pathname.split('/')
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| 25 | # Remove . and embedded ..
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| 26 | i = 0
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| 27 | while i < len(components):
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| 28 | if components[i] == '.':
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| 29 | del components[i]
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| 30 | elif components[i] == '..' and i > 0 and \
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| 31 | components[i-1] not in ('', '..'):
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| 32 | del components[i-1:i+1]
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| 33 | i = i-1
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| 34 | elif components[i] == '' and i > 0 and components[i-1] != '':
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| 35 | del components[i]
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| 36 | else:
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| 37 | i = i+1
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| 38 | if not components[0]:
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| 39 | # Absolute unix path, don't start with colon
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| 40 | rv = ':'.join(components[1:])
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| 41 | else:
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| 42 | # relative unix path, start with colon. First replace
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| 43 | # leading .. by empty strings (giving ::file)
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| 44 | i = 0
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| 45 | while i < len(components) and components[i] == '..':
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| 46 | components[i] = ''
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| 47 | i = i + 1
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| 48 | rv = ':' + ':'.join(components)
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| 49 | # and finally unquote slashes and other funny characters
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| 50 | return urllib.unquote(rv)
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| 51 |
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| 52 | def pathname2url(pathname):
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| 53 | """OS-specific conversion from a file system path to a relative URL
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| 54 | of the 'file' scheme; not recommended for general use."""
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| 55 | if '/' in pathname:
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| 56 | raise RuntimeError, "Cannot convert pathname containing slashes"
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| 57 | components = pathname.split(':')
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| 58 | # Remove empty first and/or last component
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| 59 | if components[0] == '':
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| 60 | del components[0]
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| 61 | if components[-1] == '':
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| 62 | del components[-1]
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| 63 | # Replace empty string ('::') by .. (will result in '/../' later)
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| 64 | for i in range(len(components)):
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| 65 | if components[i] == '':
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| 66 | components[i] = '..'
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| 67 | # Truncate names longer than 31 bytes
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| 68 | components = map(_pncomp2url, components)
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| 69 |
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| 70 | if os.path.isabs(pathname):
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| 71 | return '/' + '/'.join(components)
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| 72 | else:
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| 73 | return '/'.join(components)
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| 74 |
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| 75 | def _pncomp2url(component):
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| 76 | component = urllib.quote(component[:31], safe='') # We want to quote slashes
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| 77 | return component
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