refactor: extract repeated strings.ToUpper call into variable

Address PR review feedback by storing the uppercase protocol name
in a local variable instead of calling strings.ToUpper three times.

Made-with: Cursor

Author: svennergr

cmd/interactsh-client/main.go

@@ -225,9 +225,10 @@ func main() {
 				}
 			case "http", "https":
 				if noFilter || cliOptions.HTTPOnly {
-					fmt.Fprintf(builder, "[%s] Received %s interaction from %s at %s", interaction.FullId, strings.ToUpper(interaction.Protocol), interaction.RemoteAddress, interaction.Timestamp.Format("2006-01-02 15:04:05"))
+					proto := strings.ToUpper(interaction.Protocol)
+					fmt.Fprintf(builder, "[%s] Received %s interaction from %s at %s", interaction.FullId, proto, interaction.RemoteAddress, interaction.Timestamp.Format("2006-01-02 15:04:05"))
 					if cliOptions.Verbose {
-						fmt.Fprintf(builder, "\n------------\n%s Request\n------------\n\n%s\n\n-------------\n%s Response\n-------------\n\n%s\n\n", strings.ToUpper(interaction.Protocol), interaction.RawRequest, strings.ToUpper(interaction.Protocol), interaction.RawResponse)
+						fmt.Fprintf(builder, "\n------------\n%s Request\n------------\n\n%s\n\n-------------\n%s Response\n-------------\n\n%s\n\n", proto, interaction.RawRequest, proto, interaction.RawResponse)
 					}
 					writeOutput(outputFile, builder)
 				}