Golang-检查错误并推迟操作的正确顺序是什么？ [重复]

Question

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• Do we need to close the response object if an error occurs while calling http.Get(url)? 1 answer

I'm new to Go. If I'm doing an HTTP get request let this:

resp, err := http.Get("https://www.google.com")

Now I need to check whether err is nil and defer resp.Body.Close(). What's the correct order to do these two operations?

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Answer 1

You need to check for error right after the call to Get. If Get fails, resp will be set to nil. This means that resp.Body would generate runtime nil pointer dereferenced error.

resp, err := http.Get("https://www.google.com")
if err != nil {
    // process error
    return err
}
defer resp.Body.Close()