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github.com/exponent-io/jsonpath
This package extends the json.Decoder to support navigating a stream of JSON tokens. You should be able to use this extended Decoder places where a json.Decoder would have been used.
This Decoder has the following enhancements...
go get -u github.com/exponent-io/jsonpath
import "github.com/exponent-io/jsonpath"
var j = []byte(`[
{"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}},
{"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255}}
]`)
w := json.NewDecoder(bytes.NewReader(j))
var v interface{}
w.SeekTo(1, "Point", "G")
w.Decode(&v) // v is 218
var j = []byte(`{"colors":[
{"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10, "A": 58}},
{"Space": "RGB", "Point": {"R": 98, "G": 218, "B": 255, "A": 231}}
]}`)
var actions PathActions
// Extract the value at Point.A
actions.Add(func(d *Decoder) error {
var alpha int
err := d.Decode(&alpha)
fmt.Printf("Alpha: %v\n", alpha)
return err
}, "Point", "A")
w := NewDecoder(bytes.NewReader(j))
w.SeekTo("colors", 0)
var ok = true
var err error
for ok {
ok, err = w.Scan(&actions)
if err != nil && err != io.EOF {
panic(err)
}
}
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