Mercurial > p > roundup > code
annotate roundup/cgi/PageTemplates/PythonExpr.py @ 2119:cc4667ef3f12
Added the ability to toggle where error messages go.
They either go to the user (default, for backwards compatibility), the
dispatcher, or both. These are able to be toggled via settings in config.py.
Please refer to upgrading.txt for more details. (And Richard, let me know
if I've done anything wrong with this checkin. :))
| author | Eddie Parker <eparker@users.sourceforge.net> |
|---|---|
| date | Thu, 25 Mar 2004 19:27:15 +0000 |
| parents | fc52d57c6c3e |
| children | b43efe461b3e |
| rev | line source |
|---|---|
| 1049 | 1 ############################################################################## |
| 2 # | |
| 3 # Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved. | |
| 4 # | |
| 5 # This software is subject to the provisions of the Zope Public License, | |
| 6 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution. | |
| 7 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED | |
| 8 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 9 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS | |
| 10 # FOR A PARTICULAR PURPOSE | |
| 11 # | |
| 12 ############################################################################## | |
| 13 | |
| 14 """Generic Python Expression Handler | |
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15 |
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parents:
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16 Modified for Roundup 0.5 release: |
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c08b3820edd1
Adhering to ZPL
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parents:
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17 |
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Adhering to ZPL
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parents:
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18 - more informative traceback info |
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c08b3820edd1
Adhering to ZPL
Richard Jones <richard@users.sourceforge.net>
parents:
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diff
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19 |
| 1049 | 20 """ |
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21 __docformat__ = 'restructuredtext' |
| 1049 | 22 |
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23 __version__='$Revision: 1.5 $'[11:-2] |
| 1049 | 24 |
| 25 from TALES import CompilerError | |
| 26 from string import strip, split, join, replace, lstrip | |
| 27 from sys import exc_info | |
| 28 | |
| 29 class getSecurityManager: | |
| 30 '''Null security manager''' | |
| 31 def validate(self, *args, **kwargs): | |
| 32 return 1 | |
| 33 addContext = removeContext = validateValue = validate | |
| 34 | |
| 35 class PythonExpr: | |
| 36 def __init__(self, name, expr, engine): | |
| 37 self.expr = expr = replace(strip(expr), '\n', ' ') | |
| 38 try: | |
| 39 d = {} | |
| 40 exec 'def f():\n return %s\n' % strip(expr) in d | |
| 41 self._f = d['f'] | |
| 42 except: | |
| 43 raise CompilerError, ('Python expression error:\n' | |
| 44 '%s: %s') % exc_info()[:2] | |
| 45 self._get_used_names() | |
| 46 | |
| 47 def _get_used_names(self): | |
| 48 self._f_varnames = vnames = [] | |
| 49 for vname in self._f.func_code.co_names: | |
| 50 if vname[0] not in '$_': | |
| 51 vnames.append(vname) | |
| 52 | |
| 53 def _bind_used_names(self, econtext): | |
| 54 # Bind template variables | |
| 55 names = {} | |
| 56 vars = econtext.vars | |
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57 getType = econtext.getCompiler().getTypes().get |
| 1049 | 58 for vname in self._f_varnames: |
| 59 has, val = vars.has_get(vname) | |
| 60 if not has: | |
| 61 has = val = getType(vname) | |
| 62 if has: | |
| 63 val = ExprTypeProxy(vname, val, econtext) | |
| 64 if has: | |
| 65 names[vname] = val | |
| 66 return names | |
| 67 | |
| 68 def __call__(self, econtext): | |
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much nicer error messages when there's a templating error
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69 __traceback_info__ = 'python expression "%s"'%self.expr |
| 1049 | 70 f = self._f |
| 71 f.func_globals.update(self._bind_used_names(econtext)) | |
| 72 return f() | |
| 73 | |
| 74 def __str__(self): | |
| 75 return 'Python expression "%s"' % self.expr | |
| 76 def __repr__(self): | |
| 77 return '<PythonExpr %s>' % self.expr | |
| 78 | |
| 79 class ExprTypeProxy: | |
| 80 '''Class that proxies access to an expression type handler''' | |
| 81 def __init__(self, name, handler, econtext): | |
| 82 self._name = name | |
| 83 self._handler = handler | |
| 84 self._econtext = econtext | |
| 85 def __call__(self, text): | |
| 86 return self._handler(self._name, text, | |
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merged Zope Collector #372 fix from ZPT CVS trunk
Richard Jones <richard@users.sourceforge.net>
parents:
1071
diff
changeset
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87 self._econtext.getCompiler())(self._econtext) |
| 1049 | 88 |