I have following json messages:

{"status":"success","data":["val1","val2","val3"]}
{"status":"success","data":{"resultType":"vector","result":[{"metric":{"host_name":"hss4"},"value":[1504157313.787,"24"]},{"metric":{"host_name":"hss508"},"value":[1504157313.787,"32"]}]}}

where *data* can have several formats:
first one can be interpreted as:

[]string

second line's data can be parsed as:

type Data struct {
ResultType string   `json:"resultType"`
Result    struct {

Metric map[string]string `json:"metric"`
Values Values            `json:"values,omitempty"`
Value  interface{}       `json:"value,omitempty"`

        }
}

I need to parse those JSON strings, how can I do that? I've tried to make 
some parser function, the only way I come to was to create some custom 
unmarshaling function, which unmarshals one type, and if there is no such 
thing tries to unmarshal using another struct. 
I believe there must be some other way around to make it more straight 
forward. 

Any suggestions will be highly appreciated. 

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