GO时间字符串中的“ m = +”是什么？ [重复]

问题描述：

This question already has an answer here:

Unexpected output from time.Time 3 answers

I'm experimenting with Google OAuth2 and I encountered this in the expiry time of my refresh token. It comes from 2018-10-15 15:42:37.5989253 +1100 AEDT m=+3610.688917401

I know it's a time format but I couldn't find any information about m=+ anywhere. Is it used internally by Google? I tried to parse it with time.RFC3339 but as you can guess, it ignores the m=+. It says

parsing time "2018-10-15 15:42:37.5989253 +1100 AEDT m=+3610.688917401" as "2006-01-02T15:04:05Z07:00": cannot parse " 15:42:37.5989253 +1100 AEDT m=+3610.688917401" as "T"

So what's this m=+ in the time string?

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此问题已经存在在这里有答案： p>

来自时间的意外输出。时间 3个答案 span> ul> div>
我正在尝试使用Google OAuth2，并且在刷新令牌的有效期内遇到了此问题。它来自2018-10-15 15：42：37.5989253 +1100 AEDT m = + 3610.688917401 code> p>
我知道这是一种时间格式，但我找不到任何地方有关 m = + code>的任何信息。 Google内部使用它吗？我尝试使用 time.RFC3339 code>解析它，但是您可以猜到，它忽略了 m = + code>。 p>
将解析时间“ 2018-10-15 15：42：37.5989253 +1100 AEDT m = + 3610.688917401”表示为“ 2006-01-02T15：04： 05Z07：00“：无法将” 15：42：37.5989253 +1100 AEDT m = + 3610.688917401“解析为” T“ p> blockquote> 这是什么时间字符串中的m = + code>？ p> div>

答

The m=±<value> is monotonic clock reading in second.

Below is an explanation from time.Time.String documentation about that:

If the time has a monotonic clock reading, the returned string includes a final field "m=±", where value is the monotonic clock reading formatted as a decimal number of seconds.

Afaik, golang doesn't provide layout for parsing monotonic clock, so in my opinion it's safe to remove it.

dateFormat := "2006-01-02 15:04:05.999999999 -0700 MST"
dateString := "2018-10-15 15:42:37.5989253 +1100 AEDT m=+3610.688917401"

t, err := time.Parse(dateFormat, strings.Split(dateString, " m=")[0])
if err != nil {
    fmt.Println(err)
    os.Exit(0)
}

fmt.Println(t) // 2018-10-15 15:42:37.5989253 +1100 AEDT

Starting from go 1.9, calling .String() will generates date string output with monotonic clock in it. So I suggest try to use .Format() for normal usage instead of .String(). The monotonic clock info only useful for debugging purpose.

GO时间字符串中的“ m = +”是什么？ [重复]

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