def on_request_headers()

in callouts/python/extproc/example/basic/service_callout_example.py [0:0]

• 10 lines of code
• 1 McCabe index (conditional complexity)

  def on_request_headers(self, headers: HttpHeaders, _) -> HeadersResponse:
    """Custom processor on request headers.
    
    This example contains a few of the possible modifications that can be
    applied to a request header callout:
    
    * A change to the ':authority' and ':path' headers.
    * Adding the header 'header-request' with the value of 'request'.
    * Removal of a header 'foo'.
    * Clearing of the route cache.
    
    """
    logging.debug("Received request headers callout: %s", headers)
    return add_header_mutation(
        add=[
            # Change the host to 'service-extensions.com'.
            (':authority', 'service-extensions.com'),
            # Change the destination path to '/'.
            (':path', '/'),
            ('header-request', 'request')
        ],
        remove=['foo'],
        clear_route_cache=True)