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var vRet = curl.post("192.168.35.99", "http://192.168.35.99:3000/queryMsg/query", "_trunc=-1&_limit=10", 0, 1);
//parse
var vRoot = json.parse(vRet);
//IsValid
if(vRoot.IsValid()) can cause crash when 192.168.35.99 is unreachable.
so we need check v as follows in json.cpp
v8::Handle<v8::Value> v = v8pp::json_parse(m_isolate, m_str);
if (v.IsEmpty())
return false;
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if(vRoot.IsValid())can cause crash when 192.168.35.99 is unreachable.so we need check v as follows in json.cpp