removed hard coded values

servlet/config.go

@@ -34,6 +34,13 @@ type (
 	}
 )
 
+const (
+	defaultTemplateFileName = "servlet.json.example.tmpl"
+	defaultListeningPort    = ":8080"
+	defaultUrlPattern       = "/*"
+	defaultFileLocation     = "errors/"
+)
+
 const (
 	Text       ConfigType = "Text"
 	Image                 = "Image"
@@ -42,14 +49,14 @@ const (
 
 func CreateBlankConfig() *Config {
 	conf := Config{
-		ListeningAddress: ":8080",
+		ListeningAddress: defaultListeningPort,
 		Routes:           make([]ConfigEntry, 0, 10),
 	}
 
 	dummyRoute := ConfigEntry{
 		ConfigType:      Text,
-		UrlPattern:      "/*",
+		UrlPattern:      defaultUrlPattern,
-		FileLocation:    "errors/",
+		FileLocation:    defaultFileLocation,
 		UseBuiltinCache: false,
 	}
 
@@ -107,13 +114,12 @@ func getConstructorFunction(t ConfigType) (RouteConstructor, error) {
 }
 
 func GenerateBlankConfig() error {
-	fileName := "servlet.json.template.tmpl"
 	conf := CreateBlankConfig()
 	content, err := json.Marshal(&conf)
 	if err != nil {
 		return err
 	}
 	fmt.Println("Generating a blank configuration file at ")
-	ioutil.WriteFile(fileName, content, 0755)
+	ioutil.WriteFile(defaultTemplateFileName, content, 0755)
 	return nil
 }