如何在DOS窗口中正确输出字符串？ [英] How to properly output a string in a DOS window with go?

问题描述

我在go中有一个 exe ，用于打印 utf-8 编码

由于该exe是从DOS窗口使用，其输出被压缩，因为DOS使用 ibm850 编码（又名 代码页850 ）。

I have a exe in go which prints utf-8 encoded strings, with special characters in it.
Since that exe is made to be used from a DOS windows, its output is mangled because DOS uses ibm850 encoding (aka code page 850).

如何确保 exe 为DOS窗口打印正确编码的字符串，例如打印：

How would you make sure the go exe print correctly encoded strings for a DOS Windows, ie print for instance:

éèïöîôùòèìë

（没有任何翻译到右侧字符集）

instead of (without any translation to the right charset)

├®├¿├»├Â├«├┤├╣├▓├¿├¼├½

推荐答案

在线书使用Go 进行网络编程（ CC BY-NC-SA 3.0 ）有一个关于字符集的章节（管理字符集和编码 ），其中 Jan Newmarch 详细说明了将一个字符集转换为另一个。

The online book "Network programming with Go" (CC BY-NC-SA 3.0) has a chapter on Charsets (Managing character sets and encodings), in which Jan Newmarch details the conversion of one charset to another. But it seems cumbersome.

这里是一个解决方案（我可能错过了一个更简单的一个），使用 library go-charset （来自 Roger Peppe ）。

我将 utf-8 字符串转换为 ibm850 编码的，允许我在DOS窗口中打印：

Here is a solution (I might have missed a much simpler one), using the library go-charset (from Roger Peppe).
I translate an utf-8 string to an ibm850 encoded one, allowing me to print in a DOS windows:

éèïöîôùòèìë

翻译功能详述如下：

package main

import (
    "bytes"
    "code.google.com/p/go-charset/charset"
    _ "code.google.com/p/go-charset/data"
    "fmt"
    "io"
    "log"
    "strings"
)

func translate(tr charset.Translator, in string) (string, error) {
    var buf bytes.Buffer
    r := charset.NewTranslatingReader(strings.NewReader(in), tr)
    _, err := io.Copy(&buf, r)
    if err != nil {
        return "", err
    }
    return string(buf.Bytes()), nil
}

func Utf2dos(in string) string {
    dosCharset := "ibm850"
    cs := charset.Info(dosCharset)
    if cs == nil {
        log.Fatal("no info found for %q", dosCharset)
    }
    fromtr, err := charset.TranslatorTo(dosCharset)
    if err != nil {
        log.Fatal("error making translator from %q: %v", dosCharset, err)
    }
    out, err := translate(fromtr, in)
    if err != nil {
        log.Fatal("error translating from %q: %v", dosCharset, err)
    }
    return out
}

func main() {
    test := "éèïöîôùòèìë"
    fmt.Println("utf-8:\n", test)
    fmt.Println("ibm850:\n", Utf2dos(test))
}

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