文字列の開始と終了を一致させ、文字列全体を一致した値に整形するJavaScript正規表現ですか？

Question

は、私は1つの変数

文字列

{"index":"logstash-cdr","search_type":"count","ignore_unavailable":true} 
{"query":{"filtered":{"query":{"bool":{"must":[{"query_string":{"query":"*","analyze_wildcard":true}},{"query_string":{"query":"*","analyze_wildcard":true}}]}},"filter":{"bool":{"must":[{"range":{"@timestamp":{"gte":1451586600000,"lte":1483208999000,"format":"epoch_millis"}}}],"must_not":[]}}}},"size":0,"aggs":{"2":{"terms":{"field":"PhoneNumber","size":100000,"order":{"_count":"desc"}}}}} 
{"index":"logstash-cdr","ignore_unavailable":true} 
{"highlight":{"pre_tags":["@kibana-highlighted-field@"],"post_tags":["@/kibana-highlighted-field@"],"fields":{"*":{}},"require_field_match":false,"fragment_size":2147483647},"query":{"filtered":{"query":{"bool":{"must":[{"query_string":{"query":"*","analyze_wildcard":true}},{"query_string":{"query":"*","analyze_wildcard":true}}]}},"filter":{"bool":{"must":[{"range":{"@timestamp":{"gte":1451586600000,"lte":1483208999000,"format":"epoch_millis"}}}],"must_not":[]}}}},"size":50,"sort":[{"@timestamp":{"order":"desc","unmapped_type":"boolean"}}],"fields":["*","_source"],"script_fields":{},"fielddata_fields":["@timestamp"]} 
{"index":"logstash-fraud","search_type":"count","ignore_unavailable":true} 
{"query":{"filtered":{"query":{"bool":{"must":[{"query_string":{"query":"*","analyze_wildcard":true}},{"query_string":{"query":"*","analyze_wildcard":true}}]}},"filter":{"bool":{"must":[{"range":{"@timestamp":{"gte":1451586600000,"lte":1483208999000,"format":"epoch_millis"}}}],"must_not":[]}}}},"size":0,"aggs":{"2":{"terms":{"field":"PhoneNumber","size":100000,"order":{"_count":"desc"}}}}} 
{"index":"logstash-fraud","ignore_unavailable":true} 
{"query":{"filtered":{"query":{"bool":{"must":[{"query_string":{"query":"*","analyze_wildcard":true}},{"query_string":{"query":"*","analyze_wildcard":true}}]}},"filter":{"bool":{"must":[{"range":{"@timestamp":{"gte":1451586600000,"lte":1483208999000,"format":"epoch_millis"}}}],"must_not":[]}}}},"highlight":{"pre_tags":["@kibana-highlighted-field@"],"post_tags":["@/kibana-highlighted-field@"],"fields":{"*":{}},"require_field_match":false,"fragment_size":2147483647},"size":50,"sort":[{"@timestamp":{"order":"desc","unmapped_type":"boolean"}}],"fields":["*","_source"],"script_fields":{},"fielddata_fields":["@timestamp"]} 

内の文字列を持っているが、私はちょうど

{"index":"logstash-fraud","search_type":"count","ignore_unavailable":true} 
{"query":{"filtered":{"query":{"bool":{"must":[{"query_string":{"query":"*","analyze_wildcard":true}},{"query_string":{"query":"*","analyze_wildcard":true}}]}},"filter":{"bool":{"must":[{"range":{"@timestamp":{"gte":1451586600000,"lte":1483208999000,"format":"epoch_millis"}}}],"must_not":[]}}}},"size":0,"aggs":{"2":{"terms":{"field":"PhoneNumber","size":100000,"order":{"_count":"desc"}}}}} 

この行はどのように私にはJavaScriptを通じて同じことを達成することができ、印刷したいですか？

Answer 1

文字列を変数aに格納する場合。次のようにsubstring()メソッドを使用できます。

var start = a.indexOf('{"index":"logstash-fraud"'); 
c = a.substring(start,a.indexOf('{"index',start+1));