Mercurial > p > roundup > code
annotate roundup/cgi/PageTemplates/PythonExpr.py @ 5305:e20f472fde7d
issue2550799: provide basic support for handling html only emails
Initial implementation and testing with the dehtml html converter
done.
The use of beautifulsoup 4 is not tested. My test system breaks when
running dehtml.py using beautiful soup. I don't get the failures when
running under the test harness, but the text output is significantly
different (different line breaks, number of newlines etc.)
The tests for dehtml need to be generated for beautiful soup and the
expected output changed. Since I have a wonky install of beautiful
soup, I don't trust my output as the standard to test against. Also
since beautiful soup is optional, the test harness needs to skip the
beautifulsoup tests if import bs4 fails. Again something outside of my
expertise. I deleted the work I had done to implement that. I could
not get it working and wanted to get this feature in in some form.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Fri, 13 Oct 2017 21:46:59 -0400 |
| parents | 6e3e4f24c753 |
| children | 35ea9b1efc14 |
| rev | line source |
|---|---|
| 1049 | 1 ############################################################################## |
| 2 # | |
| 3 # Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved. | |
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4 # |
| 1049 | 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 | |
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11 # |
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12 ############################################################################## |
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13 # Modified for Roundup: |
| 1049 | 14 # |
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15 # 1. more informative traceback info |
| 1049 | 16 |
| 17 """Generic Python Expression Handler | |
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18 """ |
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Adhering to ZPL
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19 |
| 1049 | 20 from TALES import CompilerError |
| 21 from sys import exc_info | |
| 22 | |
| 23 class getSecurityManager: | |
| 24 '''Null security manager''' | |
| 25 def validate(self, *args, **kwargs): | |
| 26 return 1 | |
| 27 addContext = removeContext = validateValue = validate | |
| 28 | |
| 29 class PythonExpr: | |
| 30 def __init__(self, name, expr, engine): | |
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31 self.expr = expr = expr.strip().replace('\n', ' ') |
| 1049 | 32 try: |
| 33 d = {} | |
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34 exec 'def f():\n return %s\n' % expr.strip() in d |
| 1049 | 35 self._f = d['f'] |
| 36 except: | |
| 37 raise CompilerError, ('Python expression error:\n' | |
| 38 '%s: %s') % exc_info()[:2] | |
| 39 self._get_used_names() | |
| 40 | |
| 41 def _get_used_names(self): | |
| 42 self._f_varnames = vnames = [] | |
| 43 for vname in self._f.func_code.co_names: | |
| 44 if vname[0] not in '$_': | |
| 45 vnames.append(vname) | |
| 46 | |
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47 def _bind_used_names(self, econtext, _marker=[]): |
| 1049 | 48 # Bind template variables |
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49 names = {'CONTEXTS': econtext.contexts} |
| 1049 | 50 vars = econtext.vars |
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51 getType = econtext.getCompiler().getTypes().get |
| 1049 | 52 for vname in self._f_varnames: |
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53 val = vars.get(vname, _marker) |
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54 if val is _marker: |
| 1049 | 55 has = val = getType(vname) |
| 56 if has: | |
| 57 val = ExprTypeProxy(vname, val, econtext) | |
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58 names[vname] = val |
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59 else: |
| 1049 | 60 names[vname] = val |
| 61 return names | |
| 62 | |
| 63 def __call__(self, econtext): | |
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64 __traceback_info__ = 'python expression "%s"'%self.expr |
| 1049 | 65 f = self._f |
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66 f.func_globals.update(self._bind_used_names(econtext)) |
| 1049 | 67 return f() |
| 68 | |
| 69 def __str__(self): | |
| 70 return 'Python expression "%s"' % self.expr | |
| 71 def __repr__(self): | |
| 72 return '<PythonExpr %s>' % self.expr | |
| 73 | |
| 74 class ExprTypeProxy: | |
| 75 '''Class that proxies access to an expression type handler''' | |
| 76 def __init__(self, name, handler, econtext): | |
| 77 self._name = name | |
| 78 self._handler = handler | |
| 79 self._econtext = econtext | |
| 80 def __call__(self, text): | |
| 81 return self._handler(self._name, text, | |
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82 self._econtext.getCompiler())(self._econtext) |
| 1049 | 83 |