Mercurial > p > roundup > code

annotate roundup/cgi/engine_zopetal.py @ 4740:fe9568a6cbd6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Untangle template selection logic from template loading functionality.
author anatoly techtonik <techtonik@gmail.com>
date Tue, 15 Jan 2013 00:10:01 +0300
parents 94be76e04140
children 0421390b3094
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4587
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
1 """Templating engine adapter for the legacy TAL implementation ported from
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
2 Zope.
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
3 """
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
4 __docformat__ = 'restructuredtext'
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
5
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
6 import errno
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
7 import mimetypes
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
8 import os
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
9 import os.path
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
10
4740
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
11 from roundup.cgi.templating import StringIO, context, translationService, LoaderBase
4587
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
12 from roundup.cgi.PageTemplates import PageTemplate, GlobalTranslationService
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
13 from roundup.cgi.PageTemplates.Expressions import getEngine
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
14 from roundup.cgi.TAL import TALInterpreter
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
15
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
16 GlobalTranslationService.setGlobalTranslationService(translationService)
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
17
4720
fd72576e07ed API break: rename Templates to Loader for zopetal and chameleon
anatoly techtonik <techtonik@gmail.com>
parents: 4719
diff changeset
18 class Loader(LoaderBase):
4587
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
19 templates = {}
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
20
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
21 def __init__(self, dir):
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
22 self.dir = dir
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
23
4740
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
24 def check(self, name):
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
25 for extension in ['', '.html', '.xml']:
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
26 f = name + extension
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
27 src = os.path.join(self.dir, f)
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
28 if os.path.exists(src):
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
29 return (src, f)
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
30
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
31 def load(self, tplname):
4587
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
32 # find the source
4740
fe9568a6cbd6 Untangle template selection logic from template loading functionality.
anatoly techtonik <techtonik@gmail.com>
parents: 4739
diff changeset
33 src, filename = self.check(tplname)
4587
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
34
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
35 # has it changed?
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
36 try:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
37 stime = os.stat(src)[os.path.stat.ST_MTIME]
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
38 except os.error, error:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
39 if error.errno != errno.ENOENT:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
40 raise
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
41
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
42 if self.templates.has_key(src) and \
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
43 stime <= self.templates[src].mtime:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
44 # compiled template is up to date
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
45 return self.templates[src]
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
46
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
47 # compile the template
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
48 pt = RoundupPageTemplate()
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
49 # use pt_edit so we can pass the content_type guess too
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
50 content_type = mimetypes.guess_type(filename)[0] or 'text/html'
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
51 pt.pt_edit(open(src).read(), content_type)
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
52 pt.id = filename
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
53 pt.mtime = stime
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
54 # Add it to the cache. We cannot do this until the template
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
55 # is fully initialized, as we could otherwise have a race
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
56 # condition when running with multiple threads:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
57 #
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
58 # 1. Thread A notices the template is not in the cache,
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
59 # adds it, but has not yet set "mtime".
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
60 #
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
61 # 2. Thread B notices the template is in the cache, checks
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
62 # "mtime" (above) and crashes.
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
63 #
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
64 # Since Python dictionary access is atomic, as long as we
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
65 # insert "pt" only after it is fully initialized, we avoid
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
66 # this race condition. It's possible that two separate
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
67 # threads will both do the work of initializing the template,
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
68 # but the risk of wasted work is offset by avoiding a lock.
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
69 self.templates[src] = pt
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
70 return pt
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
71
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
72 class RoundupPageTemplate(PageTemplate.PageTemplate):
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
73 """A Roundup-specific PageTemplate.
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
74
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
75 Interrogate the client to set up Roundup-specific template variables
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
76 to be available. See 'context' function for the list of variables.
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
77
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
78 """
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
79
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
80 def render(self, client, classname, request, **options):
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
81 """Render this Page Template"""
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
82
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
83 if not self._v_cooked:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
84 self._cook()
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
85
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
86 __traceback_supplement__ = (PageTemplate.PageTemplateTracebackSupplement, self)
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
87
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
88 if self._v_errors:
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
89 raise PageTemplate.PTRuntimeError, \
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
90 'Page Template %s has errors.'%self.id
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
91
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
92 # figure the context
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
93 c = context(client, self, classname, request)
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
94 c.update({'options': options})
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
95
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
96 # and go
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
97 output = StringIO.StringIO()
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
98 TALInterpreter.TALInterpreter(self._v_program, self.macros,
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
99 getEngine().getContext(c), output, tal=1, strictinsert=0)()
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
100 return output.getvalue()
a2eb4fb3e6d8 New Chameleon templating engine, engine is now configurable.
Ralf Schlatterbeck <rsc@runtux.com>
parents:
diff changeset
101
Roundup Issue Tracker: http://roundup-tracker.org/