fb.js not effect

[zhxiaom5]

in fb.js, the fields.attributes.text has been added,but the filebeat output did not contain this field
need any addit config ?

[vortex314]

Can you share the fb.js and maybe a sample you are trying to parse ?

[zhxiaom5]

just like below

		console.log("Javascript engine loaded "); 
		process = function(fields){
			fields.message = fields.syslog_message
			console.log(JSON.stringify(fields))
			fields.javascript="running in GO!"
//			var d = new Date(fields.timestamp)
//			console.log(" date " + d)
			return fields
		}

it seems the js changes fields cant affect the filebeat event

in the end, i change the javascript.go like this(get the js return addfields and add it to the filebeat event), it works

func (f *javaScriptEngine) Run(event *beat.Event) (*beat.Event, error) {
        var errors []string
        //      message, _ := event.Fields.GetValue("message")
        // call the JS process function
        addFields, er := f.Engine.Call("process", nil, event)
        //      fmt.Println(fields)
        if er != nil {
                f.logger.Warn("javascript error occured ", er)
        }
        // convert added fields from JS type to native Go
        val, err := addFields.Export()
        if err != nil {
                f.logger.Warn("cannot convert variable ", addFields, er)
        } else {
                vv, ok := val.(map[string]interface{})
                if ok {
                        for kkk, vvv := range vv {
                                event.PutValue(kkk, vvv)
                        }
                }
        }

        if len(errors) > 0 {
                return event, fmt.Errorf(strings.Join(errors, ", "))
        }
        return event, nil
}

the js code below

                console.log("Javascript engine loaded "); 
                process = function (fields){
                        addfields={}
                        addfields.javascript="gowork"
                        console.log(JSON.stringify(fields))
//                      var d = new Date(fields.timestamp)
//                      console.log(" date " + d)
                        return addfields
                }