encoding/json json.Unmarshal problem(big number)

[imiskolee]

example by :

var v interface{}
json_str := "{\"i\":2596996162,\"e\":\"\",\"o\":\"\",\"s\":0,\"r\":{\"uuid\":693443841357266944}}"
json.Unmarshal([]byte(json_str),&v)
fmt.Print(v)
//Output:
//map[i:2.596996162e+09 e: o: s:0 r:map[uuid:6.93443841357267e+17]]

the uuid element in the json_str is uint64,but after json.Unmarshal,is float64

i want keep uint64 after json.Unmarshal of uuid

[bradfitz]

Use json's UseNumber. https://golang.org/pkg/encoding/json/#Decoder.UseNumber