如何在Golang中从HTTP GET请求发送JSON响应？

Question

I am learning how to build a server with Go, and wanted to know how to send a response back in JSON using Go's "encoding/json" library. Here is the code I have so far:

func HandlePosts (w http.ResponseWriter, r *http.Request) {
    rs, err := http.Get("https://jsonplaceholder.typicode.com/posts")
    if err != nil {
        panic(err)
    }

    defer rs.Body.Close()

    w.Header().Set("Content-Type", "application/json")

    json.NewEncoder(w).Encode(rs.Body)
}

When I log this response in the browser's console, it just gives me an empty object. Any help would be appreciated!

Answer 1

You can't "encode" the http.Repsonse.Body . It's an io.ReadCloser , so you need to read from it.

In this case, the response is already json, so just send it back to the client.

io.Copy(w, rs.Body)