header
No-op method for adding headers.
This method does nothing as the request has already been dispatched and is immutable.
Parameters
name
The header name (ignored).
value
The header value (ignored).
Retrieves header value(s) by name from the dispatched request.
Header names are case-insensitive. Returns the header value if present, or null otherwise.
Return
The header value(s) as a string, or null if not present.
Parameters
name
The header name (case-insensitive).