Xpl*_*ane 7 html xml pretty-print go xml-parsing
在Python,PHP和许多其他语言中,可以转换html文档并"美化"它.在Go中,使用MarshIndent函数可以非常轻松地完成JSON和XML(来自结构/接口).
Go中的XML示例:
http://play.golang.org/p/aBNfNxTEG1
package main
import (
"encoding/xml"
"fmt"
"os"
)
func main() {
type Address struct {
City, State string
}
type Person struct {
XMLName xml.Name `xml:"person"`
Id int `xml:"id,attr"`
FirstName string `xml:"name>first"`
LastName string `xml:"name>last"`
Age int `xml:"age"`
Height float32 `xml:"height,omitempty"`
Married bool
Address
Comment string `xml:",comment"`
}
v := &Person{Id: 13, FirstName: "John", LastName: "Doe", Age: 42}
v.Comment = " Need more details. "
v.Address = Address{"Hanga Roa", "Easter Island"}
output, err := xml.MarshalIndent(v, " ", " ")
if err != nil {
fmt.Printf("error: %v\n", err)
}
os.Stdout.Write(output)
}
但是,这仅适用于将struct/interface转换为[]字节.我想要的是自动转换一串html代码并缩进.例:
原始HTML
<!doctype html><html><head>
<title>Website Title</title>
</head><body>
<div class="random-class">
<h1>I like pie</h1><p>It's true!</p></div>
</body></html>
Prettified HTML
<!doctype html>
<html>
<head>
<title>Website Title</title>
</head>
<body>
<div class="random-class">
<h1>I like pie</h1>
<p>It's true!</p>
</div>
</body>
</html>
如何使用字符串完成此操作？
小智 7
我试图找出如何在Go中打印xml时发现了这个问题.由于我没有在任何地方找到答案,这是我的解决方案:
import (
"bytes"
"encoding/xml"
"io"
)
func formatXML(data []byte) ([]byte, error) {
b := &bytes.Buffer{}
decoder := xml.NewDecoder(bytes.NewReader(data))
encoder := xml.NewEncoder(b)
encoder.Indent("", " ")
for {
token, err := decoder.Token()
if err == io.EOF {
encoder.Flush()
return b.Bytes(), nil
}
if err != nil {
return nil, err
}
err = encoder.EncodeToken(token)
if err != nil {
return nil, err
}
}
}
编辑：找到了使用 XML 解析器的好方法：
package main
import (
"encoding/xml"
"fmt"
)
func main() {
html := "<html><head><title>Website Title</title></head><body><div class=\"random-class\"><h1>I like pie</h1><p>It's true!</p></div></body></html>"
type node struct {
Attr []xml.Attr
XMLName xml.Name
Children []node `xml:",any"`
Text string `xml:",chardata"`
}
x := node{}
_ = xml.Unmarshal([]byte(html), &x)
buf, _ := xml.MarshalIndent(x, "", "\t")
fmt.Println(string(buf))
}
将输出以下内容：
<html>
<head>
<title>Website Title</title>
</head>
<body>
<div>
<h1>I like pie</h1>
<p>It's true!</p>
</div>
</body>
</html>