nghttp2_check_header_name

Synopsis

#include <nghttp2/nghttp2.h>

.. function:: int nghttp2_check_header_name(const uint8_t *name, size_t len)

Returns nonzero if HTTP header field name *name* of length *len* is
valid according to http://tools.ietf.org/html/rfc7230#section-3.2

Because this is a header field name in HTTP2, the upper cased alphabet
is treated as error.