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'''
Provides dummy Transaction and Response classes is used by Cheetah in place
of real Webware transactions when the Template obj is not used directly as a
Webware servlet.
Warning: This may be deprecated in the future, please do not rely on any
specific DummyTransaction or DummyResponse behavior
'''
import types
try:
from cStringIO import StringIO
except ImportError:
import StringIO
class DummyResponseFailure(Exception):
pass
class DummyResponse(object):
'''
A dummy Response class is used by Cheetah in place of real Webware
Response objects when the Template obj is not used directly as a Webware
servlet
'''
def __init__(self):
self._outputChunks = StringIO()
def flush(self):
pass
def write(self, value):
self._outputChunks.write(value)
def writeln(self, txt):
write(txt)
write('\n')
def getvalue(self, outputChunks=None):
#chunks = outputChunks or self._outputChunks
try:
if outputChunks is not None:
return ''.join(outputChunks)
else:
return self._outputChunks.getvalue()
except UnicodeDecodeError, ex:
#not sure about the best way to check for non-unicode in StringIO
nonunicode = ''
if outputChunks:
nonunicode = [c for c in outputChunks if not isinstance(c, unicode)]
raise DummyResponseFailure('''Looks like you're trying to mix encoded strings with Unicode strings
(most likely utf-8 encoded ones)
This can happen if you're using the `EncodeUnicode` filter, or if you're manually
encoding strings as utf-8 before passing them in on the searchList (possible offenders:
%s)
(%s)''' % (nonunicode, ex))
def writelines(self, *lines):
## not used
[self.writeln(ln) for ln in lines]
class DummyTransaction(object):
'''
A dummy Transaction class is used by Cheetah in place of real Webware
transactions when the Template obj is not used directly as a Webware
servlet.
It only provides a response object and method. All other methods and
attributes make no sense in this context.
'''
def __init__(self, *args, **kwargs):
self._response = None
def response(self, resp=None):
if self._response is None:
self._response = resp or DummyResponse()
return self._response
class TransformerResponse(DummyResponse):
def __init__(self, *args, **kwargs):
super(TransformerResponse, self).__init__(*args, **kwargs)
self._filter = None
def getvalue(self, **kwargs):
output = super(TransformerResponse, self).getvalue(**kwargs)
if self._filter:
_filter = self._filter
if isinstance(_filter, types.TypeType):
_filter = _filter()
return _filter.filter(output)
return output
class TransformerTransaction(object):
def __init__(self, *args, **kwargs):
self._response = None
def response(self):
if self._response:
return self._response
return TransformerResponse()
|
