goquery基本用法

package main

import (
	"fmt"
	"strings"

	"github.com/PuerkitoBio/goquery"
)

func NewSlice(len int, item string) []string {
	result := make([]string, 0, len)
	for i := 0; i < len; i++ {
		result = append(result, item)
	}
	return result
}

func GetMarkdownTableList(url string) ([]string, error) {
	doc, err := goquery.NewDocument(url)
	if err != nil {
		return nil, err
	}

	tableList := []string{}
	appendTable := func(table []string, row []string) []string {
		if len(row) > 0 {
			if len(table) == 1 {
				head := NewSlice(len(row), "------")
				table = append(table, "|"+strings.Join(head, "|")+"|")
			}
			table = append(table, "|"+strings.Join(row, "|")+"|")
		}
		return table
	}

	doc.Find("table").Each(func(_ int, tableTag *goquery.Selection) {
		table := []string{}
		head := []string{}
		tableTag.Find("thead>tr>th").Each(func(_ int, th *goquery.Selection) {
			text := strings.TrimSpace(th.Text())
			if len(text) > 0 {
				head = append(head, text)
			}
		})
		table = appendTable(table, head)

		tableTag.Find("tbody>tr").Each(func(i int, trTag *goquery.Selection) {
			tdTag := trTag.Find("td")
			row := make([]string, 0, tdTag.Length())
			tdTag.Each(func(j int, td *goquery.Selection) {
				text := strings.TrimSpace(td.Text())
				if len(text) > 0 {
					row = append(row, text)
				}
			})
			table = appendTable(table, row)
		})
		if len(table) > 0 {
			tableList = append(tableList, strings.Join(table, "\n"))
		}
	})
	return tableList, nil
}

func main() {
	tableList, _ := GetMarkdownTableList("https://www.jianshu.com/p/7a655e5345b2")
	for _, item := range tableList {
		fmt.Println("----------------------------------")
		fmt.Println(item)
	}
}

|Tables|Are|Cool|
|------|------|------|
|col 1 is|left-aligned|$1600|
|col 2 is|centered|$12|
|col 3 is|right-aligned|$1|