I am connecting to an API which gives a rather large json payload. I need to add a key and value to the root object.Once I do ioutil.Readall from the package "net/http" the JSON is a byte array.
My goal is to just simply add to the structure and move on. As an example, the following the pretty similar to what I am doing: https://tutorialedge.net/golang/consuming-restful-api-with-go/
So how can I simply add to a JSON structure another element (key: value)?
分享 If all you want to do is add a key and value to the root object and produce new JSON, and you don't care about having the data in a structure, you can unmarshal into map[string]interface{}, add your value, and then marshal again:
var m map[string]interface{}
err := json.Unmarshal(data, &m)
m["new_key"] = newValue
newData, err := json.Marshal(m)
(I'm not checking for errors, but you should do that of course.) Take a look at https://golang.org/pkg/encoding/json/ for more information about how to deal with JSON in Go.
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