urllib.request.OpenerDirector.add_handler()

OpenerDirector.add_handler(handler)

handler should be an instance of BaseHandler. The following methods are searched, and added to the possible chains (note that HTTP errors are a special case).

• protocol_open() — signal that the handler knows how to open protocol URLs.
• http_error_type() — signal that the handler knows how to handle HTTP errors with HTTP error code type.
• protocol_error() — signal that the handler knows how to handle errors from (non-http) protocol.
• protocol_request() — signal that the handler knows how to pre-process protocol requests.
• protocol_response() — signal that the handler knows how to post-process protocol responses.