Golang HTTP响应错误可能是什么？

Question

As in many golang net/http articles, a request returns two values: response and error:

resp, err := http.Get("http://example.com/")
if err != nil {
    // handle error
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)

For http-related errors, it will be returned in resp with status code like 502, 400 etc. What are the possible errors returned? I need to know them before I can handle them.

Answer 1

1. URL parse error
2. too much redirect times
3. tcp connect\writeead timeout
4. 302 status, but null Location header

and so on

You can read the source code in http package. Then you can find all the errors returned by this function http.Get.