chore(utils): refactor & enhance custom header handling

Signed-off-by: Dwi Siswanto <me@dw1.io>

teler.go

@@ -364,8 +364,9 @@ func (t *Teler) postAnalyze(w http.ResponseWriter, r *http.Request, k threat.Thr
 	// Get the error message & convert to string as a message
 	msg := err.Error()
 
-	// Set custom headers
-	setCustomHeaders(w, msg, k)
+	// Set custom headers ("X-Teler-Msg" and "X-Teler-Threat")
+	setCustomHeader(w, xTelerMsg, msg)
+	setCustomHeader(w, xTelerThreat, k.String())
 
 	// Send the logs
 	t.sendLogs(r, k, id, msg)

utils.go

@@ -206,20 +206,18 @@ func normalizeRawStringReader(raw string) *strings.Reader {
 	return strings.NewReader(builder.String())
 }
 
-// setCustomHeader such as message and threat category to the header response
-func setCustomHeaders(w http.ResponseWriter, msg string, cat threat.Threat) {
-	// Set the "X-Teler-Msg" and "X-Teler-Threat" header in the response
-	w.Header().Set(xTelerMsg, msg)
-	w.Header().Set(xTelerThreat, cat.String())
+// setCustomHeader to set custom header to the response writer
+func setCustomHeader(w http.ResponseWriter, key, value string) {
+	w.Header().Set(key, value)
 }
 
-// setReqIdHeader to set teler request ID header response
+// setReqIdHeader to set teler request ID header response and return it
 func setReqIdHeader(w http.ResponseWriter) string {
 	// Generate a unique ID using the gouid package.
 	id := gouid.Bytes(10)
 
 	// Set the "X-Teler-Req-Id" header in the response with the unique ID.
-	w.Header().Set(xTelerReqId, id.String())
+	setCustomHeader(w, xTelerReqId, id.String())
 
 	return id.String()
 }