Added options and tests for exporters.

exporter/json.go

@@ -11,20 +11,24 @@ import (
 type JSONExporter struct {
 	FileName   string
 	EscapeHTML bool
+	Prefix     string
+	Indent     string
 }
 
 // Export exports response data as JSON streaming file
 func (e *JSONExporter) Export(exports chan interface{}) {
 
-	// Create file
-	newFile, err := os.OpenFile(internal.PreferFirst(e.FileName, "out.json"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	// Create or append file
+	file, err := os.OpenFile(internal.PreferFirst(e.FileName, "out.json"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
 	if err != nil {
 		log.Printf("Output file creation error: %v\n", err)
 		return
 	}
+	defer file.Close()
 
-	encoder := json.NewEncoder(newFile)
+	encoder := json.NewEncoder(file)
 	encoder.SetEscapeHTML(e.EscapeHTML)
+	encoder.SetIndent(e.Prefix, e.Indent)
 
 	// Export data as responses came
 	for res := range exports {