In HTTPCore (httpcli.hpp), factor out code into httpcommon.hpp that is common to both HTTP clients and servers, so upcoming HTTP server implementation can leverage on the same code currently used by the client.

openvpn/ws/chunked.hpp

@@ -29,18 +29,14 @@ namespace openvpn {
       };
 
     public:
-      struct Callback
-      {
-	virtual void chunked_content_in(BufferAllocated& buf) = 0;
-      };
-
       ChunkedHelper()
 	: state(hex),
 	  size(0)
       {
       }
 
-      bool receive(Callback& callback, BufferAllocated& buf)
+      template <typename PARENT>
+      bool receive(PARENT& callback, BufferAllocated& buf)
       {
 	while (buf.defined())
 	  {