英文:
Getting wrong Base64 encoded result in GO
问题
我有以下十六进制数据，这是将5个值（包括名称、数字和日期字段）转换为TLV格式后得到的：
0115426f627320426173656d656e74205265636f726473020f3130303032353930363730303030330314323032322d30342d32355431353a33303a30305a040a323130303130302e393905093331353031352e3135
这个十六进制数据需要进一步编码为Base64格式。我写了下面的代码来实现：
func TLVsToBase64(v string) string { // v - 十六进制格式的TLV数据
encodedTLV := b64.StdEncoding.EncodeToString([]byte(v))
return encodedTLV
}
上述十六进制数据的输出结果（错误的）如下：
MDExNTQyNmY2MjczMjA0MjYxNzM2NTZkNjU2ZTc0MjA1MjY1NjM2ZjcyNjQ3MzAyMGYzMTMwMzAzMDMyMzUzOTMwMzYzNzMwMzAzMDMwMzMwMzE0MzIzMDMyMzIyZDMwMzQyZDMyMzU1NDMxMzUzYTMzMzAzYTMwMzA1YTA0MGEzMjMxMzAzMDMxMzAzMDJlMzkzOTA1MDkzMzMxMzUzMDMxMzUyZTMxMzU=
期望的输出结果是：
ARVCb2JzIEJhc2VtZW50IFJlY29yZHMCDzEwMDAyNTkwNjcwMDAwMwMUMjAyMi0wNC0yNVQxNTozMDowMFoECjIxMDAxMDAuOTkFCTMxNTAxNS4xNQ==
我是Go语言的新手，所以请帮我解决这个问题。我可能漏掉了什么。
英文:
I have the following hex data created by converting 5 values(consists of name, numeric and date field) to TLV
0115426f627320426173656d656e74205265636f726473020f3130303032353930363730303030330314323032322d30342d32355431353a33303a30305a040a323130303130302e393905093331353031352e3135
This hex data needs to be further encoded to Base64. I wrote the below code for that
func TLVsToBase64(v string) string { // v - the TLV in hex format
encodedTLV := b64.StdEncoding.EncodeToString([]byte(v))
return encodedTLV
}
The output(which is wrong) of the aforementioned hex data is below:
MDExNTQyNmY2MjczMjA0MjYxNzM2NTZkNjU2ZTc0MjA1MjY1NjM2ZjcyNjQ3MzAyMGYzMTMwMzAzMDMyMzUzOTMwMzYzNzMwMzAzMDMwMzMwMzE0MzIzMDMyMzIyZDMwMzQyZDMyMzU1NDMxMzUzYTMzMzAzYTMwMzA1YTA0MGEzMjMxMzAzMDMxMzAzMDJlMzkzOTA1MDkzMzMxMzUzMDMxMzUyZTMxMzU=
The desired output is:
ARVCb2JzIEJhc2VtZW50IFJlY29yZHMCDzEwMDAyNTkwNjcwMDAwMwMUMjAyMi0wNC0yNVQxNTozMDowMFoECjIxMDAxMDAuOTkFCTMxNTAxNS4xNQ==
I am new to Go, so please help me to troubleshoot the issue. I might missed something
答案1
得分: 2
你的输入是一些数据的十六进制表示。你期望的输出不是该十六进制表示的UTF-8数据的Base64编码，而是该十六进制编码所代表的数据（字节），因此首先需要解码字节，例如使用hex.DecodeString()函数：
func TLVsToBase64(v string) (string, error) { // v - 十六进制格式的TLV
data, err := hex.DecodeString(v)
if err != nil {
return "", err
}
encodedTLV := base64.StdEncoding.EncodeToString(data)
return encodedTLV, nil
}
进行测试：
s := "0115426f627320426173656d656e74205265636f726473020f3130303032353930363730303030330314323032322d30342d32355431353a33303a30305a040a323130303130302e393905093331353031352e3135"
fmt.Println(TLVsToBase64(s))
输出结果与你期望的一致（可以在Go Playground上尝试）：
ARVCb2JzIEJhc2VtZW50IFJlY29yZHMCDzEwMDAyNTkwNjcwMDAwMwMUMjAyMi0wNC0yNVQxNTozMDowMFoECjIxMDAxMDAuOTkFCTMxNTAxNS4xNQ== <nil>
英文:
Your input is the hexadecimal representation of some data. And your expected output is not the Base64 encoding of the UTF-8 data of the hex representation, but rather the data (the bytes) the hex encoding represent, so first decode the bytes e.g. using hex.DecodeString():
func TLVsToBase64(v string) (string, error) { // v - the TLV in hex format
data, err := hex.DecodeString(v)
if err != nil {
return "", err
}
encodedTLV := base64.StdEncoding.EncodeToString(data)
return encodedTLV, nil
}
Testing it:
s := "0115426f627320426173656d656e74205265636f726473020f3130303032353930363730303030330314323032322d30342d32355431353a33303a30305a040a323130303130302e393905093331353031352e3135"
fmt.Println(TLVsToBase64(s))
Output is what you expect (try it on the Go Playground):
ARVCb2JzIEJhc2VtZW50IFJlY29yZHMCDzEwMDAyNTkwNjcwMDAwMwMUMjAyMi0wNC0yNVQxNTozMDowMFoECjIxMDAxMDAuOTkFCTMxNTAxNS4xNQ== <nil>
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