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Parse broken HTML with golang

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北荒
北荒 2021-02-01 10:33

I need to find elements in an HTML string. Unfortunately the HTML is pretty much broken (e.g. closing tags without an opening pair).

I tried to use XPath with launch

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  • 孤独总比滥情好
    2021-02-01 10:52

    It seems net/html does the job.

    So that's what I am doing now:

    package main

import (
    "strings"
    "golang.org/x/net/html"
    "log"
    "bytes"
    "gopkg.in/xmlpath.v2"
)

func main() {
    brokenHtml := `<!DOCTYPE html><html><body><h1 id="someid">My First Heading</h1><p>paragraph</body></html>`

    reader := strings.NewReader(brokenHtml)
    root, err := html.Parse(reader)

    if err != nil {
        log.Fatal(err)
    }

    var b bytes.Buffer
    html.Render(&b, root)
    fixedHtml := b.String()

    reader = strings.NewReader(fixedHtml)
    xmlroot, xmlerr := xmlpath.ParseHTML(reader)

    if xmlerr != nil {
        log.Fatal(xmlerr)
    }

    var xpath string
    xpath = `//h1[@id='someid']`
    path := xmlpath.MustCompile(xpath)
    if value, ok := path.String(xmlroot); ok {
        log.Println("Found:", value)
    }
}
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