编码/解码base64 [英] Encode/Decode base64

问题描述

这是我的代码，我不明白为什么解码功能不起作用.

here is my code and i don't understand why the decode function doesn't work.

请很少有见识的人.

func EncodeB64(message string) (retour string) {
    base64Text := make([]byte, base64.StdEncoding.EncodedLen(len(message)))
    base64.StdEncoding.Encode(base64Text, []byte(message))
    return string(base64Text)
}

func DecodeB64(message string) (retour string) {
    base64Text := make([]byte, base64.StdEncoding.DecodedLen(len(message)))
    base64.StdEncoding.Decode(base64Text, []byte(message))
    fmt.Printf("base64: %s\n", base64Text)
    return string(base64Text)
}

它给了我: [解码错误-输出不是utf-8] [解码错误-输出不是utf-8]

It gaves me : [Decode error - output not utf-8][Decode error - output not utf-8]

推荐答案

DecodedLen返回最大长度.

此长度对于调整缓冲区大小很有用，但是部分缓冲区不会被写入，因此将不是有效的UTF-8.

This length is useful for sizing your buffer but part of the buffer won't be written and thus won't be valid UTF-8.

您只需要使用Decode函数返回的实际书写长度.

You have to use only the real written length returned by the Decode function.

l, _ := base64.StdEncoding.Decode(base64Text, []byte(message))
log.Printf("base64: %s\n", base64Text[:l])

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