diff --git a/sources/lib/server/headers.go b/sources/lib/server/headers.go
new file mode 100644
index 0000000..626bc11
--- /dev/null
+++ b/sources/lib/server/headers.go
@@ -0,0 +1,225 @@
+
+
+package server
+
+
+import "fmt"
+import "net/http"
+import "strings"
+
+
+import . "github.com/volution/kawipiko/lib/common"
+
+
+
+
+func CanonicalHeaderNameFromBytes (_header []byte) (string) {
+	if _canonical, _found := CanonicalHeaderNamesMap[BytesToString (*NoEscapeBytes (&_header))]; _found {
+		return _canonical
+	} else {
+		return string (_header)
+	}
+}
+
+
+func CanonicalHeaderValueFromBytes (_value []byte) (string) {
+	if _canonical, _found := CanonicalHeaderValuesMap[BytesToString (*NoEscapeBytes (&_value))]; _found {
+		return _canonical
+	} else {
+		return string (_value)
+	}
+}
+
+
+func CanonicalHeaderValueRegister (_value string) () {
+	CanonicalHeaderValues = append (CanonicalHeaderValues, _value)
+	CanonicalHeaderValuesMap[_value] = _value
+}
+
+
+
+
+var CanonicalHeaderNamesMap map[string]string
+var CanonicalHeaderValuesMap map[string]string
+
+
+var CanonicalHeaderNames = []string {
+		"Accept",
+		"Accept-CH",
+		"Accept-CH-Lifetime",
+		"Accept-Charset",
+		"Accept-Encoding",
+		"Accept-Language",
+		"Accept-Patch",
+		"Accept-Push-Policy",
+		"Accept-Ranges",
+		"Accept-Signature",
+		"Access-Control-Allow-Credentials",
+		"Access-Control-Allow-Headers",
+		"Access-Control-Allow-Methods",
+		"Access-Control-Allow-Origin",
+		"Access-Control-Expose-Headers",
+		"Access-Control-Max-Age",
+		"Access-Control-Request-Headers",
+		"Access-Control-Request-Method",
+		"Age",
+		"Allow",
+		"Alt-Svc",
+		"Authorization",
+		"Cache-Control",
+		"Clear-Site-Data",
+		"Connection",
+		"Content-DPR",
+		"Content-Disposition",
+		"Content-Encoding",
+		"Content-Id",
+		"Content-Language",
+		"Content-Length",
+		"Content-Location",
+		"Content-Range",
+		"Content-Security-Policy",
+		"Content-Security-Policy-Report-Only",
+		"Content-Transfer-Encoding",
+		"Content-Type",
+		"Cookie",
+		"Cross-Origin-Resource-Policy",
+		"DNT",
+		"DPR",
+		"Date",
+		"ETag",
+		"Early-Data",
+		"Expect",
+		"Expect-CT",
+		"Expires",
+		"Feature-Policy",
+		"Forwarded",
+		"From",
+		"Host",
+		"If-Match",
+		"If-Modified-Since",
+		"If-None-Match",
+		"If-Range",
+		"If-Unmodified-Since",
+		"Index",
+		"Keep-Alive",
+		"Large-Allocation",
+		"Last-Event-ID",
+		"Last-Modified",
+		"Link",
+		"Location",
+		"Max-Forwards",
+		"NEL",
+		"Origin",
+		"Ping-From",
+		"Ping-To",
+		"Pragma",
+		"Proxy-Authenticate",
+		"Proxy-Authorization",
+		"Public-Key-Pins",
+		"Public-Key-Pins-Report-Only",
+		"Push-Policy",
+		"Range",
+		"Referer",
+		"Referrer-Policy",
+		"Report-To",
+		"Retry-After",
+		"Save-Data",
+		"Sec-WebSocket-Accept",
+		"Sec-WebSocket-Extensions",
+		"Sec-WebSocket-Key",
+		"Sec-WebSocket-Protocol",
+		"Sec-WebSocket-Version",
+		"Server",
+		"Server-Timing",
+		"Set-Cookie",
+		"Signature",
+		"Signed-Headers",
+		"SourceMap",
+		"Strict-Transport-Security",
+		"TE",
+		"Timing-Allow-Origin",
+		"Tk",
+		"Trailer",
+		"Transfer-Encoding",
+		"Upgrade",
+		"Upgrade-Insecure-Requests",
+		"User-Agent",
+		"Vary",
+		"Via",
+		"Viewport-Width",
+		"WWW-Authenticate",
+		"Warning",
+		"Width",
+		"X-Content-Type-Options",
+		"X-DNS-Prefetch-Control",
+		"X-Download-Options",
+		"X-Forwarded-By",
+		"X-Forwarded-For",
+		"X-Forwarded-Host",
+		"X-Forwarded-Proto",
+		"X-Frame-Options",
+		"X-Imforwards",
+		"X-Permitted-Cross-Domain-Policies",
+		"X-Pingback",
+		"X-Powered-By",
+		"X-Requested-With",
+		"X-Robots-Tag",
+		"X-UA-Compatible",
+		"X-XSS-Protection",
+	}
+
+
+
+
+var CanonicalHeaderValues = []string {
+		
+		"public, immutable, max-age=3600",
+		"no-store, max-age=0",
+		
+		"identity",
+		"deflate",
+		"gzip",
+		"br",
+		
+		"max-age=31536000",
+		"upgrade-insecure-requests",
+		
+		"strict-origin-when-cross-origin",
+		"nosniff",
+		"1; mode=block",
+		"sameorigin",
+		
+	}
+
+
+
+
+func init () {
+	
+	
+	CanonicalHeaderNamesMap = make (map[string]string, len (CanonicalHeaderNames) * 4)
+	for _, _header := range CanonicalHeaderNames {
+		
+		_http := http.CanonicalHeaderKey (_header)
+		_toLower := strings.ToLower (_header)
+		_toUpper := strings.ToUpper (_header)
+		
+		if _, _duplicate := CanonicalHeaderNamesMap[strings.ToLower (_header)]; _duplicate {
+			panic (fmt.Sprintf ("[f0dffe23]  invalid duplicate header `%s`", _header))
+		}
+		
+		CanonicalHeaderNamesMap[_header] = _header
+		CanonicalHeaderNamesMap[_toLower] = _header
+		CanonicalHeaderNamesMap[_toUpper] = _header
+		CanonicalHeaderNamesMap[_http] = _header
+	}
+	
+	
+	CanonicalHeaderValues = append (CanonicalHeaderValues, MimeTypes ...)
+	
+	CanonicalHeaderValuesMap = make (map[string]string, len (CanonicalHeaderValues))
+	for _, _value := range CanonicalHeaderValues {
+		CanonicalHeaderValuesMap[_value] = _value
+	}
+}
+