0001 """Simple base-classes for extensions and filters. 0002 0003 None of the filter and extension functions are considered 'optional' by the 0004 framework. These base-classes provide simple implementations for the 0005 Initialize and Terminate functions, allowing you to omit them, 0006 0007 It is not necessary to use these base-classes - but if you don't, you 0008 must ensure each of the required methods are implemented. 0009 """ 0010 0011 class SimpleExtension: 0012 "Base class for a a simple ISAPI extension" 0013 def __init__(self): 0014 pass 0015 0016 def GetExtensionVersion(self, vi): 0017 """Called by the ISAPI framework to get the extension version 0018 0019 The default implementation uses the classes docstring to 0020 set the extension description.""" 0021 # nod to our reload capability - vi is None when we are reloaded. 0022 if vi is not None: 0023 vi.ExtensionDesc = self.__doc__ 0024 0025 def HttpExtensionProc(self, control_block): 0026 """Called by the ISAPI framework for each extension request. 0027 0028 sub-classes must provide an implementation for this method. 0029 """ 0030 raise NotImplementedError, "sub-classes should override HttpExtensionProc" 0031 0032 def TerminateExtension(self, status): 0033 """Called by the ISAPI framework as the extension terminates. 0034 """ 0035 pass 0036 0037 class SimpleFilter: 0038 "Base class for a a simple ISAPI filter" 0039 filter_flags = None 0040 def __init__(self): 0041 pass 0042 0043 def GetFilterVersion(self, fv): 0044 """Called by the ISAPI framework to get the extension version 0045 0046 The default implementation uses the classes docstring to 0047 set the extension description, and uses the classes 0048 filter_flags attribute to set the ISAPI filter flags - you 0049 must specify filter_flags in your class. 0050 """ 0051 if self.filter_flags is None: 0052 raise RuntimeError, "You must specify the filter flags" 0053 # nod to our reload capability - fv is None when we are reloaded. 0054 if fv is not None: 0055 fv.Flags = self.filter_flags 0056 fv.FilterDesc = self.__doc__ 0057 0058 def HttpFilterProc(self, fc): 0059 """Called by the ISAPI framework for each filter request. 0060 0061 sub-classes must provide an implementation for this method. 0062 """ 0063 raise NotImplementedError, "sub-classes should override HttpExtensionProc" 0064 0065 def TerminateFilter(self, status): 0066 """Called by the ISAPI framework as the filter terminates. 0067 """ 0068 pass 0069
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