Go JSON Using anonymous structs for decoding
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Example
The goal with using anonymous structs is to decode only the information we care about without littering our app with types that are used only in a single function.
jsonBlob := []byte(`
{
"_total": 1,
"_links": {
"self": "https://api.twitch.tv/kraken/channels/foo/subscriptions?direction=ASC&limit=25&offset=0",
"next": "https://api.twitch.tv/kraken/channels/foo/subscriptions?direction=ASC&limit=25&offset=25"
},
"subscriptions": [
{
"created_at": "2011-11-23T02:53:17Z",
"_id": "abcdef0000000000000000000000000000000000",
"_links": {
"self": "https://api.twitch.tv/kraken/channels/foo/subscriptions/bar"
},
"user": {
"display_name": "bar",
"_id": 123456,
"name": "bar",
"staff": false,
"created_at": "2011-06-16T18:23:11Z",
"updated_at": "2014-10-23T02:20:51Z",
"logo": null,
"_links": {
"self": "https://api.twitch.tv/kraken/users/bar"
}
}
}
]
}
`)
var js struct {
Total int `json:"_total"`
Links struct {
Next string `json:"next"`
} `json:"_links"`
Subs []struct {
Created string `json:"created_at"`
User struct {
Name string `json:"name"`
ID int `json:"_id"`
} `json:"user"`
} `json:"subscriptions"`
}
err := json.Unmarshal(jsonBlob, &js)
if err != nil {
fmt.Println("error:", err)
}
fmt.Printf("%+v", js)
Output:
{Total:1 Links:{Next:https://api.twitch.tv/kraken/channels/foo/subscriptions?direction=ASC&limit=25&offset=25} Subs:[{Created:2011-11-23T02:53:17Z User:{Name:bar ID:123456}}]}
For the general case see also: http://stackoverflow.com/documentation/go/994/json/4111/encoding-decoding-go-structs
