duancai7568
2014-07-26 04:17
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Go:使用gob软件包将数据保存到文件以供以后使用是否安全?

I'm currently saving a struct to file so it can be loaded and later used by implementing gob, as follows:

func (t *Object) Load(filename string) error {

    fi, err := os.Open(filename)
    if err !=nil {
        return err
    }
    defer fi.Close()

    fz, err := gzip.NewReader(fi)
    if err !=nil {
        return err
    }
    defer fz.Close()

    decoder := gob.NewDecoder(fz)
    err = decoder.Decode(&t)
    if err !=nil {
        return err
    }

    return nil
}

func (t *Object) Save(filename string) error {

    fi, err := os.Create(filename)
    if err !=nil {
        return err
    }
    defer fi.Close()

    fz := gzip.NewWriter(fi)
    defer fz.Close()

    encoder := gob.NewEncoder(fz)
    err = encoder.Encode(t)
    if err !=nil {
        return err
    }

    return nil
}

My concern is that Go might be updated in a way that changes the way that gobs of data are encoding and decoded. If this happens then the version of my app compiled with the new version of Go would not be able to load files saved from the previous version. This would be a major issue but I'm not sure if its a realistic concern or not.

So does anyone know if I can consider it safe to save and load gob encoding data like this and expect it to still work when Go is updated?

If not, what would be the best alternative? Would my function still work if I changed gob.NewDecoder and gob.NewEncoder to xml.NewDecoder and xml.NewEncoder? (Does the XML encoder encode and decode structs in the same way as gob, i.e. without me having to tell it what they look like?)

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