Mercurial > cpython-lru_cache-weakref

annotate Lib/macurl2path.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
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children fb4b4d069cc7
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1 """Mac specific module for conversion between pathnames and URLs.
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2 Do not import directly, use urllib instead."""
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3
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4 import string
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5 import urllib
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6 import os
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7
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8 def url2pathname(pathname):
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9 "Convert /-delimited pathname to mac pathname"
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10 #
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11 # XXXX The .. handling should be fixed...
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12 #
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13 tp = urllib.splittype(pathname)[0]
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14 if tp and tp <> 'file':
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15 raise RuntimeError, 'Cannot convert non-local URL to pathname'
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16 components = string.split(pathname, '/')
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17 # Remove . and embedded ..
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18 i = 0
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19 while i < len(components):
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20 if components[i] == '.':
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21 del components[i]
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22 elif components[i] == '..' and i > 0 and \
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23 components[i-1] not in ('', '..'):
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24 del components[i-1:i+1]
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25 i = i-1
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26 elif components[i] == '' and i > 0 and components[i-1] <> '':
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27 del components[i]
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28 else:
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29 i = i+1
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30 if not components[0]:
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31 # Absolute unix path, don't start with colon
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32 return string.join(components[1:], ':')
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33 else:
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34 # relative unix path, start with colon. First replace
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35 # leading .. by empty strings (giving ::file)
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36 i = 0
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37 while i < len(components) and components[i] == '..':
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38 components[i] = ''
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39 i = i + 1
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40 return ':' + string.join(components, ':')
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41
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42 def pathname2url(pathname):
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43 "convert mac pathname to /-delimited pathname"
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44 if '/' in pathname:
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45 raise RuntimeError, "Cannot convert pathname containing slashes"
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46 components = string.split(pathname, ':')
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47 # Remove empty first and/or last component
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48 if components[0] == '':
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49 del components[0]
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50 if components[-1] == '':
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51 del components[-1]
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52 # Replace empty string ('::') by .. (will result in '/../' later)
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53 for i in range(len(components)):
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54 if components[i] == '':
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55 components[i] = '..'
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56 # Truncate names longer than 31 bytes
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57 components = map(lambda x: x[:31], components)
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58
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59 if os.path.isabs(pathname):
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60 return '/' + string.join(components, '/')
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61 else:
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62 return string.join(components, '/')
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63
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64 def test():
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65 for url in ["index.html",
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66 "bar/index.html",
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67 "/foo/bar/index.html",
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68 "/foo/bar/",
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69 "/"]:
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70 print `url`, '->', `url2pathname(url)`
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71 for path in ["drive:",
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72 "drive:dir:",
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73 "drive:dir:file",
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74 "drive:file",
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75 "file",
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76 ":file",
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77 ":dir:",
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78 ":dir:file"]:
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79 print `path`, '->', `pathname2url(path)`
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80
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81 if __name__ == '__main__':
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82 test()