Function mergeNonProtocolHeaders

header.go:88–100

mergeNonProtocolHeaders merges headers excluding protocol headers defined in protocolHeaders.

(into, from http.Header)

// mergeNonProtocolHeaders merges headers excluding protocol headers defined in
// protocolHeaders.
func mergeNonProtocolHeaders(into, from http.Header) {
	for key, vals := range from {
		if len(vals) == 0 {
			// For response trailers, net/http will pre-populate entries
			// with nil values based on the "Trailer" header. But if there
			// are no actual values for those keys, we skip them.
			continue
		}
		if _, isProtocolHeader := protocolHeaders[key]; !isProtocolHeader {
			into[key] = append(into[key], vals...)
		}
	}
}

// getHeaderCanonical is a shortcut for Header.Get() which
// bypasses the CanonicalMIMEHeaderKey operation when we