/
htmldom.go
287 lines (227 loc) · 7.3 KB
/
htmldom.go
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package libraries
/*
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strings"
xhtml "golang.org/x/net/html"
)
type Embeded struct {
Type string `json:"type"`
HTML string `json:"html"`
}
func MediaManipulation(page string) (string, error) {
layout, err := xhtml.Parse(strings.NewReader(page))
if err != nil {
return "", err
}
var newLayout *xhtml.Node
newLayout, err = HTMLDOM(layout)
if err != nil {
return "", err
}
newLayoutString := renderNode(newLayout)
newLayoutString = strings.Replace(newLayoutString, "<html>", "", -1)
newLayoutString = strings.Replace(newLayoutString, "</html>", "", -1)
newLayoutString = strings.Replace(newLayoutString, "<head>", "", -1)
newLayoutString = strings.Replace(newLayoutString, "</head>", "", -1)
newLayoutString = strings.Replace(newLayoutString, "<body>", "", -1)
newLayoutString = strings.Replace(newLayoutString, "</body>", "", -1)
newLayoutString = cleanSpecialCharacter(newLayoutString)
return newLayoutString, nil
}
func HTMLDOM(node *xhtml.Node) (*xhtml.Node, error) {
var doc *xhtml.Node
if node.Type == xhtml.ElementNode && node.Data == "img" {
for i, img := range node.Attr {
if img.Key == "src" {
wp2017 := "https://theshonet.com/wp-content/uploads/2017/"
wp2018 := "https://theshonet.com/wp-content/uploads/2018/"
if strings.Contains(img.Val, wp2017) || strings.Contains(img.Val, wp2018) {
path := strings.Split(img.Val, "/")
filename := path[cap(path)-1]
path[2] = "theshonet-assets.s3.ap-southeast-1.amazonaws.com"
node.Attr[i] = xhtml.Attribute{}
node.Attr = append(node.Attr, xhtml.Attribute{Key: "src", Val: strings.Join(path, "/")})
path = path[:cap(path)-1]
newPath := strings.Join(path, "/")
node.Attr = append(node.Attr, xhtml.Attribute{Key: "srcset", Val: newPath + "/w320/" + filename + " 320w, " + newPath + "/w480/" + filename + " 480w, " + newPath + "/w800/" + filename + " 800w"})
node.Attr = append(node.Attr, xhtml.Attribute{Key: "sizes", Val: "(max-width: 320px) 280px, (max-width: 480px) 440px, 800px"})
}
}
}
}
if node.Type == xhtml.ElementNode && node.Data == "p" {
for _, p := range node.Attr {
if !strings.Contains(p.Val, "text-align:") {
node.Attr = []xhtml.Attribute{}
}
}
if node.FirstChild != nil && node.FirstChild.Type == xhtml.TextNode {
if strings.Contains(node.FirstChild.Data, "https://www.instagram.com") {
embed, err := instagramEmbed(node.FirstChild.Data)
if err != nil {
return doc, err
}
node.FirstChild.Data = ""
node.AppendChild(embed)
}
if strings.Contains(node.FirstChild.Data, "https://twitter.com") {
embed, err := twitterEmbed(node.FirstChild.Data)
if err != nil {
return doc, err
}
node.FirstChild.Data = ""
node.AppendChild(embed)
}
if strings.Contains(node.FirstChild.Data, "https://www.youtube.com") || strings.Contains(node.FirstChild.Data, "https://youtu.be/") {
embed, err := youtubeEmbed(node.FirstChild.Data)
if err != nil {
return doc, err
}
node.FirstChild.Data = ""
node.AppendChild(embed)
}
}
}
if node.Type == xhtml.ElementNode && node.Data == "div" {
for _, div := range node.Attr {
if strings.Contains(div.Key, "style") {
node.Attr = []xhtml.Attribute{}
}
}
if node.FirstChild != nil && node.FirstChild.Type == xhtml.TextNode {
if strings.Contains(node.FirstChild.Data, "https://www.instagram.com") {
embed, err := instagramEmbed(node.FirstChild.Data)
if err != nil {
return doc, err
}
node.FirstChild.Data = ""
node.AppendChild(embed)
}
if strings.Contains(node.FirstChild.Data, "https://twitter.com") {
embed, err := twitterEmbed(node.FirstChild.Data)
if err != nil {
return doc, err
}
node.FirstChild.Data = ""
node.AppendChild(embed)
}
if strings.Contains(node.FirstChild.Data, "https://www.youtube.com") || strings.Contains(node.FirstChild.Data, "https://youtu.be") {
embed, err := youtubeEmbed(node.FirstChild.Data)
if err != nil {
return doc, err
}
node.FirstChild.Data = ""
node.AppendChild(embed)
}
}
}
for child := node.FirstChild; child != nil; child = child.NextSibling {
HTMLDOM(child)
}
doc = node
return doc, nil
}
func instagramEmbed(url string) (*xhtml.Node, error) {
var instaDoc *xhtml.Node
instaHTML := fmt.Sprintf("https://api.instagram.com/oembed?url=%s", url)
req, err := http.NewRequest("GET", instaHTML, nil)
if err != nil {
return instaDoc, err
}
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return instaDoc, err
}
defer resp.Body.Close()
var instagram Embeded
if err := json.NewDecoder(resp.Body).Decode(&instagram); err != nil {
return instaDoc, err
}
instaDoc, err = xhtml.Parse(strings.NewReader(instagram.HTML))
if err != nil {
return instaDoc, err
}
return instaDoc, nil
}
func twitterEmbed(url string) (*xhtml.Node, error) {
var twitterDoc *xhtml.Node
twitterURL := fmt.Sprintf("https://publish.twitter.com/oembed?url=%s", url)
req, err := http.NewRequest("GET", twitterURL, nil)
if err != nil {
return twitterDoc, err
}
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return twitterDoc, err
}
defer resp.Body.Close()
var twitter Embeded
if err := json.NewDecoder(resp.Body).Decode(&twitter); err != nil {
return twitterDoc, err
}
twitterDoc, err = xhtml.Parse(strings.NewReader(twitter.HTML))
if err != nil {
return twitterDoc, err
}
return twitterDoc, nil
}
func youtubeEmbed(uri string) (*xhtml.Node, error) {
var youtubeDoc *xhtml.Node
var id string
xURL, err := url.Parse(uri)
if err != nil {
return youtubeDoc, err
}
if strings.Contains(uri, "https://www.youtube.com") {
path, err := url.ParseQuery(xURL.RawQuery)
if err != nil {
return youtubeDoc, err
}
id = path.Get("v")
}
if strings.Contains(uri, "https://youtu.be/") {
path, err := url.Parse(uri)
if err != nil {
return youtubeDoc, err
}
id = strings.Replace(path.EscapedPath(), "/", "", -1)
}
iframe := `<iframe id="ytplayer" type="text/html" width="100%" height="450px" src="https://www.youtube.com/embed/` + id + `?rel=0&showinfo=0&color=white&iv_load-policy=3" frameborder="0" allowfullscreen></iframe>`
youtubeDoc, err = xhtml.Parse(strings.NewReader(iframe))
if err != nil {
return youtubeDoc, err
}
return youtubeDoc, nil
}
func renderNode(node *xhtml.Node) string {
var buf bytes.Buffer
write := io.Writer(&buf)
xhtml.Render(write, node)
return buf.String()
}
func cleanSpecialCharacter(page string) string {
page = strings.Replace(page, "‘", "'", -1)
page = strings.Replace(page, "’", "'", -1)
page = strings.Replace(page, "“", "'", -1)
page = strings.Replace(page, "”", "'", -1)
page = strings.Replace(page, "–", "-", -1)
page = strings.Replace(page, "Â", "", -1)
page = strings.Replace(page, "â", "", -1)
page = strings.Replace(page, "‘", "'", -1)
page = strings.Replace(page, "’", "'", -1)
page = strings.Replace(page, "“", "'", -1)
page = strings.Replace(page, "”", "'", -1)
page = strings.Replace(page, "–", "-", -1)
page = strings.Replace(page, "Â", "", -1)
page = strings.Replace(page, "â", "", -1)
return page
}
*/