本篇文章說明 goquery 的部分函式，goquery 是 html parser

Installation

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go get github.com/PuerkitoBio/goquery

html example

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html := `
<div class="title">
  Example
</div>
<div class="content">
  <p>Hello goquery</p>
</div>
<div class="other">
  Other
</div>
`

string 轉換 goquery.Document

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doc, err := goquery.NewDocumentFromReader(strings.NewReader(html))

goquery.Document.Find

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doc, _ := goquery.NewDocumentFromReader(strings.NewReader(html))
fmt.Println(doc.Find("div").First().Text()) // Example

goquery.Document.Filter

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doc, _ := goquery.NewDocumentFromReader(strings.NewReader(html))
fmt.Println(doc.Find("div").
    Filter(".other").
    First().
    Text()) // Other

goquery.Document.FilterFunction

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doc, _ := goquery.NewDocumentFromReader(strings.NewReader(html))
containParagraph := func(i int, s *goquery.Selection) bool {
    return s.Find("p").Length() != 0
}
fmt.Println(doc.Find("div").
    FilterFunction(containParagraph).
    First().
    Text()) // Hello goquery

goquery.Document.Each

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eachFunc := func(i int, s *goquery.Selection) {
    fmt.Println(s.Text())
}
doc, _ := goquery.NewDocumentFromReader(strings.NewReader(html))
doc.Find("div").Each(eachFunc)
// Example
// Hello goquery
// Other