dorkahemp972157683 2014-07-02 18:13
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如何在App Engine Go日志中自动记录功能/行号?

I have written a number of GAE Golang applications and I'm rather unsatisfied with my current logging approach. I can't seem to find an easy way to log line numbers or even which functions a log was created in App Engine. Is there some automatic way of creating such meaningful logs? At the moment I am resulting to just manually numbering my errors, like:

c.Debugf("Backend - Upkeep error 5 - %v", err)
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  • dongshadu4498 2014-07-02 18:23
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    You need to create your own function and use runtime.Caller

    Working Example: http://play.golang.org/p/CQghRzJ3x_

    func debug(format string, args ...interface{}) {
        _, file, line, ok := runtime.Caller(1)
        if !ok {
            file = "???"
            line = 0
        }
        log.Printf(file+":"+strconv.Itoa(line)+" - "+format, args...)
    }
    
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