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			|  |  |  | # just for testing locally | 
		
	
		
			
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			|  |  |  | import http.server | 
		
	
		
			
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			|  |  |  | class MyHTTPRequestHandler(http.server.SimpleHTTPRequestHandler): | 
		
	
		
			
			|  |  |  | def end_headers(self): | 
		
	
		
			
			|  |  |  | self.send_my_headers() | 
		
	
		
			
			|  |  |  | http.server.SimpleHTTPRequestHandler.end_headers(self) | 
		
	
		
			
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			|  |  |  | def send_my_headers(self): | 
		
	
		
			
			|  |  |  | self.send_header("Cache-Control", "no-cache, no-store, must-revalidate") | 
		
	
		
			
			|  |  |  | self.send_header("Pragma", "no-cache") | 
		
	
		
			
			|  |  |  | self.send_header("Expires", "0") | 
		
	
		
			
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			|  |  |  | if __name__ == '__main__': | 
		
	
		
			
			|  |  |  | http.server.test(HandlerClass=MyHTTPRequestHandler) |