如何使用Golang的net / http包读取流式响应正文？

Question

我正在尝试连接到一个执行json数据流的端点。我想知道如何使用Go的net/http包执行基本请求，并在响应出现时读取响应？目前，我只能在连接关闭时读取响应。

resp, err := http.Get("localhost:8080/stream")
if err != nil {
    ...
}
...
// perform work while connected and getting data

任何帮助都将不胜感激！谢谢!

Answer 1

The way to do streaming JSON parsing is with a Decoder:

json.NewDecoder(resp.Body).Decode(&yourStuff)

For a streaming API where it's a bunch of objects coming back (a la Twitter), that should stream great with this model and the built-in encoding/json API. But if it's a large response where you have an object that's got a giant array with 10MB of stuff, you probably need to write your own Decoder to pull those inner pieces out and return them. I'm running into that problem with a library I've written.