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annotate Lib/macurl2path.py @ 3720:b341def4eef8 legacy-trunk

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author Guido van Rossum <guido@python.org>
date Wed, 26 Jun 1996 19:30:01 +0000
parents 0602db1d1dff
children ac3324e638e9
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0602db1d1dff Conversions between mac paths and URLs
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1 """Mac specific module for conversion between pathnames and URLs."""
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2
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3 import string
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4 import urllib
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5 import os
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6
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7 def url2pathname(pathname):
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8 "Convert /-delimited pathname to mac pathname"
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9 #
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10 # XXXX The .. handling should be fixed...
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11 #
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12 tp = urllib.splittype(pathname)[0]
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13 if tp and tp <> 'file':
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14 raise RuntimeError, 'Cannot convert non-local URL to pathname'
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15 components = string.split(pathname, '/')
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16 # Remove . and embedded ..
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17 i = 0
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18 while i < len(components):
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19 if components[i] == '.':
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20 del components[i]
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21 elif components[i] == '..' and i > 0 and \
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22 components[i-1] not in ('', '..'):
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23 del components[i-1:i+1]
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24 i = i-1
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25 elif components[i] == '' and i > 0 and components[i-1] <> '':
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26 del components[i]
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27 else:
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28 i = i+1
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29 if not components[0]:
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30 # Absolute unix path, don't start with colon
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31 return string.join(components[1:], ':')
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32 else:
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33 # relative unix path, start with colon. First replace
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34 # leading .. by empty strings (giving ::file)
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35 i = 0
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36 while i < len(components) and components[i] == '..':
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37 components[i] = ''
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38 i = i + 1
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39 return ':' + string.join(components, ':')
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40
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41 def pathname2url(pathname):
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42 "convert mac pathname to /-delimited pathname"
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43 if '/' in pathname:
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44 raise RuntimeError, "Cannot convert pathname containing slashes"
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45 components = string.split(pathname, ':')
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46 # Replace empty string ('::') by .. (will result in '/../' later)
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47 for i in range(1, len(components)):
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48 if components[i] == '':
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49 components[i] = '..'
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50 # Truncate names longer than 31 bytes
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51 components = map(lambda x: x[:31], components)
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52
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53 if os.path.isabs(pathname):
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54 return '/' + string.join(components, '/')
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55 else:
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56 return string.join(components, '/')
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57
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58 def test():
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59 for url in ["index.html",
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60 "bar/index.html",
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61 "/foo/bar/index.html",
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62 "/foo/bar/",
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63 "/"]:
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64 print `url`, '->', `url2pathname(url)`
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65 for path in ["drive:",
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66 "drive:dir:",
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67 "drive:dir:file",
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68 "drive:file",
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69 "file",
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70 ":file",
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71 ":dir:",
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72 ":dir:file"]:
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73 print `path`, '->', `pathname2url(path)`
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74
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75 if __name__ == '__main__':
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76 test()