duanjian7617 2016-10-17 22:59
浏览 792

golang XML结束解析并显示“无效的UTF-8”错误

I am having an issue unmarshaling XML with unicode characters.

When attempting to parse XML with standard English characters, it parses the entire file and unmarshals correctly without any issues. However, if the the XML file contains a character such as ñ, á, or – (em-dash), it stops parsing the XML and only returns the items in the array that are before the item with that character.

For example, here is XML:

    <ID value="1" name="Item 1" GCName="Item 1" />
    <ID value="2" name="Item 2" GCName="Item 2" />
    <ID value="3" name="Item 3" GCName="Item 3 With ñ" />
    <ID value="4" name="Item 4" GCName="Item 4" />

This is my Go code (rough without any imports):

# main.go

type Response struct {
    Items []Items `xml:"items"`

type Items struct {
    Item []Item `xml:"item"`

type Item struct {
    ID    ItemID `xml:"ID"`

type ItemID struct {
    Value  string `xml:"value,attr"`
    Name   string `xml:"name,attr"`
    GCName string `xml:"GCName,attr"`

func main() {
    xmlFile, err := os.Open("C:\path\to\xml\file.xml")
    if err != nil {
        fmt.Println("Error opening file!")
    defer xmlFile.Close()

    xmlData, err := io.ReadAll(xmlFile)
    if err != nil {
        fmt.Println("Error reading file!")

    var response Response
    err := xml.Unmarshal(xmlData, &response)
    if err != nil {
        fmt.Println("Error unmarshaling XML")

This code will print out only the first two items, as if they were the only two. It will also output:

Error unmarshaling XML
XML syntax error on line 9; Invalid UTF-8

I have also tried using xml.Decoder with a CharsetReader using a different encoding, but this did not yield any different results. FWIW, I am using Windows.

Is there a way I can get around this error? Swap out the "bad" characters for something else? It was my understanding that those characters are valid UTF-8...so what gives??

Thanks in advance!

  • 写回答

2条回答 默认 最新

  • duanliaolan6178 2016-10-18 08:49

    Reader that filters out invalid UTF-8 characters

    package main
        import (
        // ValidUTF8Reader implements a Reader which reads only bytes that constitute valid UTF-8
        type ValidUTF8Reader struct {
            buffer *bufio.Reader
        // Function Read reads bytes in the byte array b. n is the number of bytes read.
        func (rd ValidUTF8Reader) Read(b []byte) (n int, err error) {
            for {
                var r rune
                var size int
                r, size, err = rd.buffer.ReadRune()
                if err != nil {
                if r == unicode.ReplacementChar && size == 1 {
                } else if n+size < len(b) {
                    utf8.EncodeRune(b[n:], r)
                    n += size
                } else {
        // NewValidUTF8Reader constructs a new ValidUTF8Reader that wraps an existing io.Reader
        func NewValidUTF8Reader(rd io.Reader) ValidUTF8Reader {
            return ValidUTF8Reader{bufio.NewReader(rd)}

    taken from here

    本回答被题主选为最佳回答 , 对您是否有帮助呢?



  • ¥15 如何用最短的时间大致看懂springboot+vue的项目
  • ¥15 (有偿)懂数值分析和含时变参数微分方程的来
  • ¥15 layui父页的数据表格如何用弹窗页提交后的查询数据来更新数据表格内容?
  • ¥15 abaqus随机生成二维颗粒
  • ¥15 安装ansys许可证管理器时出现了这个问题,如何解决?
  • ¥100 高价求算法,利用智能手机传感器计算车辆的三轴g值
  • ¥15 Blazor server 数据库操作异常,如何解决?(语言-c#)
  • ¥15 uni-app开发APP运行到浏览器访问接口跨域
  • ¥100 mfc消息自创建控件
  • ¥15 网页视频跳过后学习进度未增加