1 files changed, 95 insertions, 0 deletions
diff --git a/cheetah/DummyTransaction.py b/cheetah/DummyTransaction.py
new file mode 100644
index 0000000..26d2ea7
--- /dev/null
+++ b/cheetah/DummyTransaction.py
@@ -0,0 +1,95 @@
+
+'''
+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
+
+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 = []
+
+    def flush(self):
+        pass
+        
+    def write(self, value):
+        self._outputChunks.append(value)
+
+    def writeln(self, txt):
+        write(txt)
+        write('\n')
+
+    def getvalue(self, outputChunks=None):
+        chunks = outputChunks or self._outputChunks
+        try: 
+            return ''.join(chunks)
+        except UnicodeDecodeError, ex:
+            nonunicode = [c for c in chunks 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()
+