Mercurial > cpython-lru_cache-weakref

annotate Lib/macurl2path.py @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents b11780b068fa
children 71a294bd7950
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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4a23cc49e2b0 Actually, the previous batch's comment should have been different;
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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 "Convert /-delimited pathname to mac pathname"
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12 #
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13 # XXXX The .. handling should be fixed...
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14 #
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15 tp = urllib.splittype(pathname)[0]
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16 if tp and tp != 'file':
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17 raise RuntimeError, 'Cannot convert non-local URL to pathname'
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18 # Turn starting /// into /, an empty hostname means current host
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19 if pathname[:3] == '///':
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20 pathname = pathname[2:]
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21 elif pathname[:2] == '//':
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22 raise RuntimeError, 'Cannot convert non-local URL to pathname'
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23 components = pathname.split('/')
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24 # Remove . and embedded ..
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25 i = 0
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26 while i < len(components):
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27 if components[i] == '.':
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28 del components[i]
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29 elif components[i] == '..' and i > 0 and \
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30 components[i-1] not in ('', '..'):
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31 del components[i-1:i+1]
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32 i = i-1
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33 elif components[i] == '' and i > 0 and components[i-1] != '':
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34 del components[i]
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35 else:
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36 i = i+1
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37 if not components[0]:
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38 # Absolute unix path, don't start with colon
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39 rv = ':'.join(components[1:])
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40 else:
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41 # relative unix path, start with colon. First replace
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42 # leading .. by empty strings (giving ::file)
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43 i = 0
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44 while i < len(components) and components[i] == '..':
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45 components[i] = ''
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46 i = i + 1
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47 rv = ':' + ':'.join(components)
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48 # and finally unquote slashes and other funny characters
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49 return urllib.unquote(rv)
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50
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51 def pathname2url(pathname):
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52 "convert mac pathname to /-delimited pathname"
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53 if '/' in pathname:
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54 raise RuntimeError, "Cannot convert pathname containing slashes"
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55 components = pathname.split(':')
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56 # Remove empty first and/or last component
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57 if components[0] == '':
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58 del components[0]
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59 if components[-1] == '':
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60 del components[-1]
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61 # Replace empty string ('::') by .. (will result in '/../' later)
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62 for i in range(len(components)):
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63 if components[i] == '':
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64 components[i] = '..'
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65 # Truncate names longer than 31 bytes
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66 components = map(_pncomp2url, components)
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67
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68 if os.path.isabs(pathname):
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69 return '/' + '/'.join(components)
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70 else:
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71 return '/'.join(components)
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72
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73 def _pncomp2url(component):
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74 component = urllib.quote(component[:31], safe='') # We want to quote slashes
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75 return component
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76
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77 def test():
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78 for url in ["index.html",
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79 "bar/index.html",
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80 "/foo/bar/index.html",
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81 "/foo/bar/",
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82 "/"]:
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83 print `url`, '->', `url2pathname(url)`
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84 for path in ["drive:",
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85 "drive:dir:",
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86 "drive:dir:file",
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87 "drive:file",
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88 "file",
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89 ":file",
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90 ":dir:",
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91 ":dir:file"]:
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92 print `path`, '->', `pathname2url(path)`
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93
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94 if __name__ == '__main__':
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95 test()