[Golang] Web Scrape Blogger Post via goquery
Fetch a public post on Blogger and extract data via goquery.
We will extract the following data from HTML:
- PostUrl
- Title
- TimeStamp
- Author
- Summary
- Content
- Tags
The following is complete source code:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | package main
import (
"errors"
"github.com/PuerkitoBio/goquery"
"strings"
)
type PostData struct {
PostUrl string
Title string
TimeStamp string
Author string
Summary string
Content string
Tags string
}
func GetBlogspotTimeStamp(doc *goquery.Document) (string, error) {
abbr := doc.Find("a.timestamp-link > abbr").First()
t, ok := abbr.Attr("title")
if ok {
return t, nil
}
return "", errors.New("cannot find timestamp")
}
func GetBlogspotTitle(doc *goquery.Document) (string, error) {
t := doc.Find("h3.post-title").First()
return strings.TrimSpace(t.Text()), nil
}
func GetBlogspotContent(doc *goquery.Document) (string, error) {
c := doc.Find("div.post-body").First()
return c.Html()
}
func GetBlogspotUrl(doc *goquery.Document) (string, error) {
meta := doc.Find("meta[property='og:url']").First()
u, ok := meta.Attr("content")
if ok {
return u, nil
}
return "", errors.New("cannot find url")
}
func GetBlogspotSummary(doc *goquery.Document) (string, error) {
meta := doc.Find("meta[property='og:description']").First()
d, ok := meta.Attr("content")
if ok {
return d, nil
}
return "", errors.New("cannot find summary")
}
func GetBlogspotAuthor(doc *goquery.Document) (string, error) {
a := doc.Find("span.post-author > span.fn").First()
return a.Text(), nil
}
func GetBlogspotTags(doc *goquery.Document) (string, error) {
s := doc.Find("span.post-labels > a")
labels := ""
s.Each(func(_ int, l *goquery.Selection) {
if labels != "" {
labels += ", "
}
labels += l.Text()
})
return labels, nil
}
func ParseBlogspotPost(doc *goquery.Document) (*PostData, error) {
bs := PostData{}
var err error
bs.TimeStamp, err = GetBlogspotTimeStamp(doc)
if err != nil {
return &bs, err
}
bs.Title, err = GetBlogspotTitle(doc)
if err != nil {
return &bs, err
}
bs.Content, err = GetBlogspotContent(doc)
if err != nil {
return &bs, err
}
bs.PostUrl, err = GetBlogspotUrl(doc)
if err != nil {
return &bs, err
}
bs.Summary, err = GetBlogspotSummary(doc)
if err != nil {
return &bs, err
}
bs.Author, err = GetBlogspotAuthor(doc)
if err != nil {
return &bs, err
}
bs.Tags, err = GetBlogspotTags(doc)
if err != nil {
return &bs, err
}
return &bs, nil
}
func main() {
//url := "https://oathbystyx.blogspot.tw/2018/01/descartes-rules-of-signs.html"
url := "https://timrau.blogspot.com/2017/11/avoid-vim-overwriting-indention-settings.html"
doc, err := goquery.NewDocument(url)
if err != nil {
panic(err)
}
post, err := ParseBlogspotPost(doc)
if err != nil {
panic(err)
}
println(post.TimeStamp)
println(post.Title)
println(post.Content)
println(post.PostUrl)
println(post.Summary)
println(post.Author)
println(post.Tags)
}
|
Tested on: Ubuntu Linux 17.10, Go 1.9.2.
References:
[1] | [Golang] Web Scrape Facebook Post via goquery |
[2] | GitHub - PuerkitoBio/goquery: A little like that j-thing, only in Go. ![]() |
[3] | Tips and tricks · PuerkitoBio/goquery Wiki · GitHub |