130 lines
3.2 KiB
Go
130 lines
3.2 KiB
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package rewrite // import "miniflux.app/reader/rewrite"
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import (
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"fmt"
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"regexp"
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"strings"
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"github.com/PuerkitoBio/goquery"
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)
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var (
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youtubeRegex = regexp.MustCompile(`youtube\.com/watch\?v=(.*)`)
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imgRegex = regexp.MustCompile(`<img [^>]+>`)
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textLinkRegex = regexp.MustCompile(`(?mi)(\bhttps?:\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])`)
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)
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func addImageTitle(entryURL, entryContent string) string {
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doc, err := goquery.NewDocumentFromReader(strings.NewReader(entryContent))
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if err != nil {
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return entryContent
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}
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matches := doc.Find("img[src][title]")
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if matches.Length() > 0 {
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matches.Each(func(i int, img *goquery.Selection) {
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altAttr := img.AttrOr("alt", "")
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srcAttr, _ := img.Attr("src")
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titleAttr, _ := img.Attr("title")
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img.ReplaceWithHtml(`<figure><img src="` + srcAttr + `" alt="` + altAttr + `"/><figcaption><p>` + titleAttr + `</p></figcaption></figure>`)
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})
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output, _ := doc.Find("body").First().Html()
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return output
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}
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return entryContent
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}
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func addDynamicImage(entryURL, entryContent string) string {
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doc, err := goquery.NewDocumentFromReader(strings.NewReader(entryContent))
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if err != nil {
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return entryContent
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}
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// Ordered most preferred to least preferred.
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candidateAttrs := []string{
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"data-src",
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"data-original",
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"data-orig",
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"data-url",
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"data-orig-file",
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"data-large-file",
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"data-medium-file",
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"data-2000src",
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"data-1000src",
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"data-800src",
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"data-655src",
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"data-500src",
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"data-380src",
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}
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changed := false
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doc.Find("img,div").Each(func(i int, img *goquery.Selection) {
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for _, candidateAttr := range candidateAttrs {
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if srcAttr, found := img.Attr(candidateAttr); found {
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changed = true
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if img.Is("img") {
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img.SetAttr("src", srcAttr)
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} else {
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altAttr := img.AttrOr("alt", "")
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img.ReplaceWithHtml(`<img src="` + srcAttr + `" alt="` + altAttr + `"/>`)
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}
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break
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}
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}
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})
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if !changed {
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doc.Find("noscript").Each(func(i int, noscript *goquery.Selection) {
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matches := imgRegex.FindAllString(noscript.Text(), 2)
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if len(matches) == 1 {
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changed = true
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noscript.ReplaceWithHtml(matches[0])
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}
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})
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}
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if changed {
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output, _ := doc.Find("body").First().Html()
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return output
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}
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return entryContent
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}
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func addYoutubeVideo(entryURL, entryContent string) string {
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matches := youtubeRegex.FindStringSubmatch(entryURL)
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if len(matches) == 2 {
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video := `<iframe width="650" height="350" frameborder="0" src="https://www.youtube-nocookie.com/embed/` + matches[1] + `" allowfullscreen></iframe>`
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return video + "<p>" + replaceLineFeeds(replaceTextLinks(entryContent)) + "</p>"
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}
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return entryContent
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}
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func addPDFLink(entryURL, entryContent string) string {
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if strings.HasSuffix(entryURL, ".pdf") {
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return fmt.Sprintf(`<a href="%s">PDF</a><br>%s`, entryURL, entryContent)
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}
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return entryContent
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}
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func replaceTextLinks(input string) string {
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return textLinkRegex.ReplaceAllString(input, `<a href="${1}">${1}</a>`)
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}
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func replaceLineFeeds(input string) string {
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return strings.Replace(input, "\n", "<br>", -1)
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}
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