gistfile1.txt

{
    "fields":["id","name","title","description","url","domain"],
    "query": {
        "custom_score": {
            "query": {
                "match_all":{}
            },
            "filter": {
                "terms":{
                    "tags":["twitter"]
                 }
            },
            "params":{
                "tags":["twitter"]
            },
            "script":"_score * 2"
         }
     }
}