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Refactor RSS Parser to use an adapter

This commit is contained in:
Frédéric Guillot 2024-03-13 21:06:28 -07:00
parent 66b8483791
commit 648b9a8f6f
11 changed files with 497 additions and 364 deletions

View file

@ -91,7 +91,7 @@ type atom10Entry struct {
Content atom10Text `xml:"http://www.w3.org/2005/Atom content"`
Authors atomAuthors `xml:"author"`
Categories []atom10Category `xml:"category"`
media.Element
media.MediaItemElement
}
func (a *atom10Entry) Transform() *model.Entry {

View file

@ -6,7 +6,7 @@ package googleplay // import "miniflux.app/v2/internal/reader/googleplay"
// Specs:
// https://support.google.com/googleplay/podcasts/answer/6260341
// https://www.google.com/schemas/play-podcasts/1.0/play-podcasts.xsd
type GooglePlayFeedElement struct {
type GooglePlayChannelElement struct {
GooglePlayAuthor string `xml:"http://www.google.com/schemas/play-podcasts/1.0 author"`
GooglePlayEmail string `xml:"http://www.google.com/schemas/play-podcasts/1.0 email"`
GooglePlayImage GooglePlayImageElement `xml:"http://www.google.com/schemas/play-podcasts/1.0 image"`

View file

@ -6,7 +6,7 @@ package itunes // import "miniflux.app/v2/internal/reader/itunes"
import "strings"
// Specs: https://help.apple.com/itc/podcasts_connect/#/itcb54353390
type ItunesFeedElement struct {
type ItunesChannelElement struct {
ItunesAuthor string `xml:"http://www.itunes.com/dtds/podcast-1.0.dtd author"`
ItunesBlock string `xml:"http://www.itunes.com/dtds/podcast-1.0.dtd block"`
ItunesCategories []ItunesCategoryElement `xml:"http://www.itunes.com/dtds/podcast-1.0.dtd category"`
@ -22,7 +22,7 @@ type ItunesFeedElement struct {
ItunesType string `xml:"http://www.itunes.com/dtds/podcast-1.0.dtd type"`
}
func (i *ItunesFeedElement) GetItunesCategories() []string {
func (i *ItunesChannelElement) GetItunesCategories() []string {
var categories []string
for _, category := range i.ItunesCategories {
categories = append(categories, category.Text)

View file

@ -11,9 +11,8 @@ import (
var textLinkRegex = regexp.MustCompile(`(?mi)(\bhttps?:\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])`)
// Element represents XML media elements.
// Specs: https://www.rssboard.org/media-rss
type Element struct {
type MediaItemElement struct {
MediaGroups []Group `xml:"http://search.yahoo.com/mrss/ group"`
MediaContents []Content `xml:"http://search.yahoo.com/mrss/ content"`
MediaThumbnails []Thumbnail `xml:"http://search.yahoo.com/mrss/ thumbnail"`
@ -22,7 +21,7 @@ type Element struct {
}
// AllMediaThumbnails returns all thumbnail elements merged together.
func (e *Element) AllMediaThumbnails() []Thumbnail {
func (e *MediaItemElement) AllMediaThumbnails() []Thumbnail {
var items []Thumbnail
items = append(items, e.MediaThumbnails...)
for _, mediaGroup := range e.MediaGroups {
@ -32,7 +31,7 @@ func (e *Element) AllMediaThumbnails() []Thumbnail {
}
// AllMediaContents returns all content elements merged together.
func (e *Element) AllMediaContents() []Content {
func (e *MediaItemElement) AllMediaContents() []Content {
var items []Content
items = append(items, e.MediaContents...)
for _, mediaGroup := range e.MediaGroups {
@ -42,7 +41,7 @@ func (e *Element) AllMediaContents() []Content {
}
// AllMediaPeerLinks returns all peer link elements merged together.
func (e *Element) AllMediaPeerLinks() []PeerLink {
func (e *MediaItemElement) AllMediaPeerLinks() []PeerLink {
var items []PeerLink
items = append(items, e.MediaPeerLinks...)
for _, mediaGroup := range e.MediaGroups {
@ -52,7 +51,7 @@ func (e *Element) AllMediaPeerLinks() []PeerLink {
}
// FirstMediaDescription returns the first description element.
func (e *Element) FirstMediaDescription() string {
func (e *MediaItemElement) FirstMediaDescription() string {
description := e.MediaDescriptions.First()
if description != "" {
return description

View file

@ -28,15 +28,14 @@ func (r *RDFAdapter) BuildFeed(feedURL string) *model.Feed {
feed := &model.Feed{
Title: stripTags(r.rdf.Channel.Title),
FeedURL: feedURL,
SiteURL: r.rdf.Channel.Link,
}
if feed.Title == "" {
feed.Title = feedURL
}
if siteURL, err := urllib.AbsoluteURL(feedURL, r.rdf.Channel.Link); err != nil {
feed.SiteURL = r.rdf.Channel.Link
} else {
if siteURL, err := urllib.AbsoluteURL(feedURL, r.rdf.Channel.Link); err == nil {
feed.SiteURL = siteURL
}

View file

@ -0,0 +1,310 @@
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package rss // import "miniflux.app/v2/internal/reader/rss"
import (
"html"
"log/slog"
"path"
"strconv"
"strings"
"time"
"miniflux.app/v2/internal/crypto"
"miniflux.app/v2/internal/model"
"miniflux.app/v2/internal/reader/date"
"miniflux.app/v2/internal/reader/sanitizer"
"miniflux.app/v2/internal/urllib"
)
type RSSAdapter struct {
rss *RSS
}
func NewRSSAdapter(rss *RSS) *RSSAdapter {
return &RSSAdapter{rss}
}
func (r *RSSAdapter) BuildFeed(feedURL string) *model.Feed {
feed := &model.Feed{
Title: html.UnescapeString(strings.TrimSpace(r.rss.Channel.Title)),
FeedURL: feedURL,
SiteURL: r.rss.Channel.Link,
}
if siteURL, err := urllib.AbsoluteURL(feedURL, r.rss.Channel.Link); err == nil {
feed.SiteURL = siteURL
}
// Try to find the feed URL from the Atom links.
for _, atomLink := range r.rss.Channel.AtomLinks.Links {
atomLinkHref := strings.TrimSpace(atomLink.URL)
if atomLinkHref != "" && atomLink.Rel == "self" {
if absoluteFeedURL, err := urllib.AbsoluteURL(feedURL, atomLinkHref); err == nil {
feed.FeedURL = absoluteFeedURL
break
}
}
}
// Fallback to the site URL if the title is empty.
if feed.Title == "" {
feed.Title = feed.SiteURL
}
// Get TTL if defined.
if r.rss.Channel.TTL != "" {
if ttl, err := strconv.Atoi(r.rss.Channel.TTL); err == nil {
feed.TTL = ttl
}
}
// Get the feed icon URL if defined.
if r.rss.Channel.Image != nil {
if absoluteIconURL, err := urllib.AbsoluteURL(feed.SiteURL, r.rss.Channel.Image.URL); err == nil {
feed.IconURL = absoluteIconURL
}
}
for _, item := range r.rss.Channel.Items {
entry := model.NewEntry()
entry.Author = findEntryAuthor(&item)
entry.Date = findEntryDate(&item)
entry.Content = findEntryContent(&item)
entry.Enclosures = findEntryEnclosures(&item)
// Populate the entry URL.
entryURL := findEntryURL(&item)
if entryURL == "" {
entry.URL = feed.SiteURL
} else {
if absoluteEntryURL, err := urllib.AbsoluteURL(feed.SiteURL, entryURL); err == nil {
entry.URL = absoluteEntryURL
} else {
entry.URL = entryURL
}
}
// Populate the entry title.
entry.Title = findEntryTitle(&item)
if entry.Title == "" {
entry.Title = sanitizer.TruncateHTML(entry.Content, 100)
}
if entry.Title == "" {
entry.Title = entry.URL
}
if entry.Author == "" {
entry.Author = findFeedAuthor(&r.rss.Channel)
}
// Generate the entry hash.
for _, value := range []string{item.GUID.Data, entryURL} {
if value != "" {
entry.Hash = crypto.Hash(value)
break
}
}
// Find CommentsURL if defined.
if absoluteCommentsURL := strings.TrimSpace(item.CommentsURL); absoluteCommentsURL != "" && urllib.IsAbsoluteURL(absoluteCommentsURL) {
entry.CommentsURL = absoluteCommentsURL
}
// Set podcast listening time.
if item.ItunesDuration != "" {
if duration, err := getDurationInMinutes(item.ItunesDuration); err == nil {
entry.ReadingTime = duration
}
}
// Populate entry categories.
entry.Tags = append(entry.Tags, item.Categories...)
entry.Tags = append(entry.Tags, r.rss.Channel.Categories...)
entry.Tags = append(entry.Tags, r.rss.Channel.GetItunesCategories()...)
if r.rss.Channel.GooglePlayCategory.Text != "" {
entry.Tags = append(entry.Tags, r.rss.Channel.GooglePlayCategory.Text)
}
feed.Entries = append(feed.Entries, entry)
}
return feed
}
func findFeedAuthor(rssChannel *RSSChannel) string {
var author string
switch {
case rssChannel.ItunesAuthor != "":
author = rssChannel.ItunesAuthor
case rssChannel.GooglePlayAuthor != "":
author = rssChannel.GooglePlayAuthor
case rssChannel.ItunesOwner.String() != "":
author = rssChannel.ItunesOwner.String()
case rssChannel.ManagingEditor != "":
author = rssChannel.ManagingEditor
case rssChannel.Webmaster != "":
author = rssChannel.Webmaster
}
return sanitizer.StripTags(strings.TrimSpace(author))
}
func findEntryTitle(rssItem *RSSItem) string {
title := rssItem.Title
if rssItem.DublinCoreTitle != "" {
title = rssItem.DublinCoreTitle
}
return html.UnescapeString(strings.TrimSpace(title))
}
func findEntryURL(rssItem *RSSItem) string {
for _, link := range []string{rssItem.FeedBurnerLink, rssItem.Link} {
if link != "" {
return strings.TrimSpace(link)
}
}
for _, atomLink := range rssItem.AtomLinks.Links {
if atomLink.URL != "" && (strings.EqualFold(atomLink.Rel, "alternate") || atomLink.Rel == "") {
return strings.TrimSpace(atomLink.URL)
}
}
// Specs: https://cyber.harvard.edu/rss/rss.html#ltguidgtSubelementOfLtitemgt
// isPermaLink is optional, its default value is true.
// If its value is false, the guid may not be assumed to be a url, or a url to anything in particular.
if rssItem.GUID.IsPermaLink == "true" || rssItem.GUID.IsPermaLink == "" {
return strings.TrimSpace(rssItem.GUID.Data)
}
return ""
}
func findEntryContent(rssItem *RSSItem) string {
for _, value := range []string{
rssItem.DublinCoreContent,
rssItem.Description,
rssItem.GooglePlayDescription,
rssItem.ItunesSummary,
rssItem.ItunesSubtitle,
} {
if value != "" {
return value
}
}
return ""
}
func findEntryDate(rssItem *RSSItem) time.Time {
value := rssItem.PubDate
if rssItem.DublinCoreDate != "" {
value = rssItem.DublinCoreDate
}
if value != "" {
result, err := date.Parse(value)
if err != nil {
slog.Debug("Unable to parse date from RSS feed",
slog.String("date", value),
slog.String("guid", rssItem.GUID.Data),
slog.Any("error", err),
)
return time.Now()
}
return result
}
return time.Now()
}
func findEntryAuthor(rssItem *RSSItem) string {
var author string
switch {
case rssItem.GooglePlayAuthor != "":
author = rssItem.GooglePlayAuthor
case rssItem.ItunesAuthor != "":
author = rssItem.ItunesAuthor
case rssItem.DublinCoreCreator != "":
author = rssItem.DublinCoreCreator
case rssItem.AtomAuthor.String() != "":
author = rssItem.AtomAuthor.String()
case strings.Contains(rssItem.Author.Inner, "<![CDATA["):
author = rssItem.Author.Data
default:
author = rssItem.Author.Inner
}
return strings.TrimSpace(sanitizer.StripTags(author))
}
func findEntryEnclosures(rssItem *RSSItem) model.EnclosureList {
enclosures := make(model.EnclosureList, 0)
duplicates := make(map[string]bool)
for _, mediaThumbnail := range rssItem.AllMediaThumbnails() {
if _, found := duplicates[mediaThumbnail.URL]; !found {
duplicates[mediaThumbnail.URL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: mediaThumbnail.URL,
MimeType: mediaThumbnail.MimeType(),
Size: mediaThumbnail.Size(),
})
}
}
for _, enclosure := range rssItem.Enclosures {
enclosureURL := enclosure.URL
if rssItem.FeedBurnerEnclosureLink != "" {
filename := path.Base(rssItem.FeedBurnerEnclosureLink)
if strings.Contains(enclosureURL, filename) {
enclosureURL = rssItem.FeedBurnerEnclosureLink
}
}
if enclosureURL == "" {
continue
}
if _, found := duplicates[enclosureURL]; !found {
duplicates[enclosureURL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: enclosureURL,
MimeType: enclosure.Type,
Size: enclosure.Size(),
})
}
}
for _, mediaContent := range rssItem.AllMediaContents() {
if _, found := duplicates[mediaContent.URL]; !found {
duplicates[mediaContent.URL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: mediaContent.URL,
MimeType: mediaContent.MimeType(),
Size: mediaContent.Size(),
})
}
}
for _, mediaPeerLink := range rssItem.AllMediaPeerLinks() {
if _, found := duplicates[mediaPeerLink.URL]; !found {
duplicates[mediaPeerLink.URL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: mediaPeerLink.URL,
MimeType: mediaPeerLink.MimeType(),
Size: mediaPeerLink.Size(),
})
}
}
return enclosures
}

View file

@ -3,8 +3,8 @@
package rss // import "miniflux.app/v2/internal/reader/rss"
// FeedBurnerElement represents FeedBurner XML elements.
type FeedBurnerElement struct {
// FeedBurnerItemElement represents FeedBurner XML elements.
type FeedBurnerItemElement struct {
FeedBurnerLink string `xml:"http://rssnamespace.org/feedburner/ext/1.0 origLink"`
FeedBurnerEnclosureLink string `xml:"http://rssnamespace.org/feedburner/ext/1.0 origEnclosureLink"`
}

View file

@ -13,11 +13,11 @@ import (
// Parse returns a normalized feed struct from a RSS feed.
func Parse(baseURL string, data io.ReadSeeker) (*model.Feed, error) {
feed := new(rssFeed)
rssFeed := new(RSS)
decoder := xml.NewXMLDecoder(data)
decoder.DefaultSpace = "rss"
if err := decoder.Decode(feed); err != nil {
if err := decoder.Decode(rssFeed); err != nil {
return nil, fmt.Errorf("rss: unable to parse feed: %w", err)
}
return feed.Transform(baseURL), nil
return NewRSSAdapter(rssFeed).BuildFeed(baseURL), nil
}

View file

@ -846,6 +846,59 @@ func TestParseEntryWithEnclosures(t *testing.T) {
}
}
func TestParseEntryWithIncorrectEnclosureLength(t *testing.T) {
data := `<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0">
<channel>
<title>My Podcast Feed</title>
<link>http://example.org</link>
<author>some.email@example.org</author>
<item>
<title>Podcasting with RSS</title>
<link>http://www.example.org/entries/1</link>
<description>An overview of RSS podcasting</description>
<pubDate>Fri, 15 Jul 2005 00:00:00 -0500</pubDate>
<guid isPermaLink="true">http://www.example.org/entries/1</guid>
<enclosure url="http://www.example.org/myaudiofile.mp3" length="invalid" type="audio/mpeg" />
<enclosure url="http://www.example.org/myaudiofile.wav" length=" " type="audio" />
</item>
</channel>
</rss>`
feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
if err != nil {
t.Fatal(err)
}
if len(feed.Entries) != 1 {
t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
}
if feed.Entries[0].URL != "http://www.example.org/entries/1" {
t.Errorf("Incorrect entry URL, got: %s", feed.Entries[0].URL)
}
if len(feed.Entries[0].Enclosures) != 2 {
t.Errorf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
}
if feed.Entries[0].Enclosures[0].URL != "http://www.example.org/myaudiofile.mp3" {
t.Errorf("Incorrect enclosure URL, got: %s", feed.Entries[0].Enclosures[0].URL)
}
if feed.Entries[0].Enclosures[0].MimeType != "audio/mpeg" {
t.Errorf("Incorrect enclosure type, got: %s", feed.Entries[0].Enclosures[0].MimeType)
}
if feed.Entries[0].Enclosures[0].Size != 0 {
t.Errorf("Incorrect enclosure length, got: %d", feed.Entries[0].Enclosures[0].Size)
}
if feed.Entries[0].Enclosures[1].Size != 0 {
t.Errorf("Incorrect enclosure length, got: %d", feed.Entries[0].Enclosures[0].Size)
}
}
func TestParseEntryWithEmptyEnclosureURL(t *testing.T) {
data := `<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0">
@ -1306,6 +1359,60 @@ func TestParseEntryWithMediaPeerLink(t *testing.T) {
}
}
func TestParseItunesDuration(t *testing.T) {
data := `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
<channel>
<title>Podcast Example</title>
<link>http://www.example.com/index.html</link>
<item>
<title>Podcast Episode</title>
<guid>http://example.com/episode.m4a</guid>
<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
<itunes:duration>1:23:45</itunes:duration>
</item>
</channel>
</rss>`
feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
if err != nil {
t.Fatal(err)
}
expected := 83
result := feed.Entries[0].ReadingTime
if expected != result {
t.Errorf(`Unexpected podcast duration, got %d instead of %d`, result, expected)
}
}
func TestParseIncorrectItunesDuration(t *testing.T) {
data := `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
<channel>
<title>Podcast Example</title>
<link>http://www.example.com/index.html</link>
<item>
<title>Podcast Episode</title>
<guid>http://example.com/episode.m4a</guid>
<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
<itunes:duration>invalid</itunes:duration>
</item>
</channel>
</rss>`
feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
if err != nil {
t.Fatal(err)
}
expected := 0
result := feed.Entries[0].ReadingTime
if expected != result {
t.Errorf(`Unexpected podcast duration, got %d instead of %d`, result, expected)
}
}
func TestEntryDescriptionFromItunesSummary(t *testing.T) {
data := `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">

View file

@ -12,8 +12,7 @@ import (
var ErrInvalidDurationFormat = errors.New("rss: invalid duration format")
// normalizeDuration returns the duration tag value as a number of minutes
func normalizeDuration(rawDuration string) (int, error) {
func getDurationInMinutes(rawDuration string) (int, error) {
var sumSeconds int
durationParts := strings.Split(rawDuration, ":")

View file

@ -5,391 +5,110 @@ package rss // import "miniflux.app/v2/internal/reader/rss"
import (
"encoding/xml"
"html"
"log/slog"
"path"
"strconv"
"strings"
"time"
"miniflux.app/v2/internal/crypto"
"miniflux.app/v2/internal/model"
"miniflux.app/v2/internal/reader/date"
"miniflux.app/v2/internal/reader/dublincore"
"miniflux.app/v2/internal/reader/googleplay"
"miniflux.app/v2/internal/reader/itunes"
"miniflux.app/v2/internal/reader/media"
"miniflux.app/v2/internal/reader/sanitizer"
"miniflux.app/v2/internal/urllib"
)
// Specs: https://www.rssboard.org/rss-specification
type rssFeed struct {
XMLName xml.Name `xml:"rss"`
type RSS struct {
Version string `xml:"rss version,attr"`
Channel rssChannel `xml:"rss channel"`
Channel RSSChannel `xml:"rss channel"`
}
type rssChannel struct {
Categories []string `xml:"rss category"`
type RSSChannel struct {
Title string `xml:"rss title"`
Link string `xml:"rss link"`
ImageURL string `xml:"rss image>url"`
Language string `xml:"rss language"`
Description string `xml:"rss description"`
PubDate string `xml:"rss pubDate"`
Language string `xml:"rss language"`
Copyright string `xml:"rss copyRight"`
ManagingEditor string `xml:"rss managingEditor"`
Webmaster string `xml:"rss webMaster"`
TimeToLive rssTTL `xml:"rss ttl"`
Items []rssItem `xml:"rss item"`
PubDate string `xml:"rss pubDate"`
LastBuildDate string `xml:"rss lastBuildDate"`
Categories []string `xml:"rss category"`
Generator string `xml:"rss generator"`
Docs string `xml:"rss docs"`
Cloud *RSSCloud `xml:"rss cloud"`
Image *RSSImage `xml:"rss image"`
TTL string `xml:"rss ttl"`
SkipHours []string `xml:"rss skipHours>hour"`
SkipDays []string `xml:"rss skipDays>day"`
Items []RSSItem `xml:"rss item"`
AtomLinks
itunes.ItunesFeedElement
googleplay.GooglePlayFeedElement
itunes.ItunesChannelElement
googleplay.GooglePlayChannelElement
}
type rssTTL struct {
Data string `xml:",chardata"`
type RSSCloud struct {
Domain string `xml:"domain,attr"`
Port string `xml:"port,attr"`
Path string `xml:"path,attr"`
RegisterProcedure string `xml:"registerProcedure,attr"`
Protocol string `xml:"protocol,attr"`
}
func (r *rssTTL) Value() int {
if r.Data == "" {
return 0
}
type RSSImage struct {
// URL is the URL of a GIF, JPEG or PNG image that represents the channel.
URL string `xml:"url"`
value, err := strconv.Atoi(r.Data)
if err != nil {
return 0
}
// Title describes the image, it's used in the ALT attribute of the HTML <img> tag when the channel is rendered in HTML.
Title string `xml:"title"`
return value
// Link is the URL of the site, when the channel is rendered, the image is a link to the site.
Link string `xml:"link"`
}
func (r *rssFeed) Transform(baseURL string) *model.Feed {
var err error
feed := new(model.Feed)
siteURL := r.siteURL()
feed.SiteURL, err = urllib.AbsoluteURL(baseURL, siteURL)
if err != nil {
feed.SiteURL = siteURL
}
feedURL := r.feedURL()
feed.FeedURL, err = urllib.AbsoluteURL(baseURL, feedURL)
if err != nil {
feed.FeedURL = feedURL
}
feed.Title = html.UnescapeString(strings.TrimSpace(r.Channel.Title))
if feed.Title == "" {
feed.Title = feed.SiteURL
}
feed.IconURL = strings.TrimSpace(r.Channel.ImageURL)
feed.TTL = r.Channel.TimeToLive.Value()
for _, item := range r.Channel.Items {
entry := item.Transform()
if entry.Author == "" {
entry.Author = r.feedAuthor()
}
if entry.URL == "" {
entry.URL = feed.SiteURL
} else {
entryURL, err := urllib.AbsoluteURL(feed.SiteURL, entry.URL)
if err == nil {
entry.URL = entryURL
}
}
if entry.Title == "" {
entry.Title = sanitizer.TruncateHTML(entry.Content, 100)
}
if entry.Title == "" {
entry.Title = entry.URL
}
entry.Tags = append(entry.Tags, r.Channel.Categories...)
entry.Tags = append(entry.Tags, r.Channel.GetItunesCategories()...)
if r.Channel.GooglePlayCategory.Text != "" {
entry.Tags = append(entry.Tags, r.Channel.GooglePlayCategory.Text)
}
feed.Entries = append(feed.Entries, entry)
}
return feed
}
func (r *rssFeed) siteURL() string {
return strings.TrimSpace(r.Channel.Link)
}
func (r *rssFeed) feedURL() string {
for _, atomLink := range r.Channel.AtomLinks.Links {
if atomLink.Rel == "self" {
return strings.TrimSpace(atomLink.URL)
}
}
return ""
}
func (r rssFeed) feedAuthor() string {
var author string
switch {
case r.Channel.ItunesAuthor != "":
author = r.Channel.ItunesAuthor
case r.Channel.GooglePlayAuthor != "":
author = r.Channel.GooglePlayAuthor
case r.Channel.ItunesOwner.String() != "":
author = r.Channel.ItunesOwner.String()
case r.Channel.ManagingEditor != "":
author = r.Channel.ManagingEditor
case r.Channel.Webmaster != "":
author = r.Channel.Webmaster
}
return sanitizer.StripTags(strings.TrimSpace(author))
}
type rssGUID struct {
XMLName xml.Name
Data string `xml:",chardata"`
IsPermaLink string `xml:"isPermaLink,attr"`
}
type rssAuthor struct {
XMLName xml.Name
Data string `xml:",chardata"`
Inner string `xml:",innerxml"`
}
type rssEnclosure struct {
URL string `xml:"url,attr"`
Type string `xml:"type,attr"`
Length string `xml:"length,attr"`
}
func (enclosure *rssEnclosure) Size() int64 {
if enclosure.Length == "" {
return 0
}
size, _ := strconv.ParseInt(enclosure.Length, 10, 0)
return size
}
type rssItem struct {
GUID rssGUID `xml:"rss guid"`
Title string `xml:"rss title"`
Link string `xml:"rss link"`
Description string `xml:"rss description"`
PubDate string `xml:"rss pubDate"`
Author rssAuthor `xml:"rss author"`
Comments string `xml:"rss comments"`
EnclosureLinks []rssEnclosure `xml:"rss enclosure"`
Categories []string `xml:"rss category"`
type RSSItem struct {
Title string `xml:"rss title"`
Link string `xml:"rss link"`
Description string `xml:"rss description"`
Author RSSAuthor `xml:"rss author"`
Categories []string `xml:"rss category"`
CommentsURL string `xml:"rss comments"`
Enclosures []RSSEnclosure `xml:"rss enclosure"`
GUID RSSGUID `xml:"rss guid"`
PubDate string `xml:"rss pubDate"`
Source RSSSource `xml:"rss source"`
dublincore.DublinCoreItemElement
FeedBurnerElement
media.Element
FeedBurnerItemElement
media.MediaItemElement
AtomAuthor
AtomLinks
itunes.ItunesItemElement
googleplay.GooglePlayItemElement
}
func (r *rssItem) Transform() *model.Entry {
entry := model.NewEntry()
entry.URL = r.entryURL()
entry.CommentsURL = r.entryCommentsURL()
entry.Date = r.entryDate()
entry.Author = r.entryAuthor()
entry.Hash = r.entryHash()
entry.Content = r.entryContent()
entry.Title = r.entryTitle()
entry.Enclosures = r.entryEnclosures()
entry.Tags = r.Categories
if duration, err := normalizeDuration(r.ItunesDuration); err == nil {
entry.ReadingTime = duration
}
return entry
type RSSAuthor struct {
XMLName xml.Name
Data string `xml:",chardata"`
Inner string `xml:",innerxml"`
}
func (r *rssItem) entryDate() time.Time {
value := r.PubDate
if r.DublinCoreDate != "" {
value = r.DublinCoreDate
}
if value != "" {
result, err := date.Parse(value)
if err != nil {
slog.Debug("Unable to parse date from RSS feed",
slog.String("date", value),
slog.String("guid", r.GUID.Data),
slog.Any("error", err),
)
return time.Now()
}
return result
}
return time.Now()
type RSSEnclosure struct {
URL string `xml:"url,attr"`
Type string `xml:"type,attr"`
Length string `xml:"length,attr"`
}
func (r *rssItem) entryAuthor() string {
var author string
switch {
case r.GooglePlayAuthor != "":
author = r.GooglePlayAuthor
case r.ItunesAuthor != "":
author = r.ItunesAuthor
case r.DublinCoreCreator != "":
author = r.DublinCoreCreator
case r.AtomAuthor.String() != "":
author = r.AtomAuthor.String()
case strings.Contains(r.Author.Inner, "<![CDATA["):
author = r.Author.Data
default:
author = r.Author.Inner
func (enclosure *RSSEnclosure) Size() int64 {
if strings.TrimSpace(enclosure.Length) == "" {
return 0
}
return strings.TrimSpace(sanitizer.StripTags(author))
size, _ := strconv.ParseInt(enclosure.Length, 10, 0)
return size
}
func (r *rssItem) entryHash() string {
for _, value := range []string{r.GUID.Data, r.entryURL()} {
if value != "" {
return crypto.Hash(value)
}
}
return ""
type RSSGUID struct {
Data string `xml:",chardata"`
IsPermaLink string `xml:"isPermaLink,attr"`
}
func (r *rssItem) entryTitle() string {
title := r.Title
if r.DublinCoreTitle != "" {
title = r.DublinCoreTitle
}
return html.UnescapeString(strings.TrimSpace(title))
}
func (r *rssItem) entryContent() string {
for _, value := range []string{
r.DublinCoreContent,
r.Description,
r.GooglePlayDescription,
r.ItunesSummary,
r.ItunesSubtitle,
} {
if value != "" {
return value
}
}
return ""
}
func (r *rssItem) entryURL() string {
for _, link := range []string{r.FeedBurnerLink, r.Link} {
if link != "" {
return strings.TrimSpace(link)
}
}
for _, atomLink := range r.AtomLinks.Links {
if atomLink.URL != "" && (strings.EqualFold(atomLink.Rel, "alternate") || atomLink.Rel == "") {
return strings.TrimSpace(atomLink.URL)
}
}
// Specs: https://cyber.harvard.edu/rss/rss.html#ltguidgtSubelementOfLtitemgt
// isPermaLink is optional, its default value is true.
// If its value is false, the guid may not be assumed to be a url, or a url to anything in particular.
if r.GUID.IsPermaLink == "true" || r.GUID.IsPermaLink == "" {
return strings.TrimSpace(r.GUID.Data)
}
return ""
}
func (r *rssItem) entryEnclosures() model.EnclosureList {
enclosures := make(model.EnclosureList, 0)
duplicates := make(map[string]bool)
for _, mediaThumbnail := range r.AllMediaThumbnails() {
if _, found := duplicates[mediaThumbnail.URL]; !found {
duplicates[mediaThumbnail.URL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: mediaThumbnail.URL,
MimeType: mediaThumbnail.MimeType(),
Size: mediaThumbnail.Size(),
})
}
}
for _, enclosure := range r.EnclosureLinks {
enclosureURL := enclosure.URL
if r.FeedBurnerEnclosureLink != "" {
filename := path.Base(r.FeedBurnerEnclosureLink)
if strings.Contains(enclosureURL, filename) {
enclosureURL = r.FeedBurnerEnclosureLink
}
}
if enclosureURL == "" {
continue
}
if _, found := duplicates[enclosureURL]; !found {
duplicates[enclosureURL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: enclosureURL,
MimeType: enclosure.Type,
Size: enclosure.Size(),
})
}
}
for _, mediaContent := range r.AllMediaContents() {
if _, found := duplicates[mediaContent.URL]; !found {
duplicates[mediaContent.URL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: mediaContent.URL,
MimeType: mediaContent.MimeType(),
Size: mediaContent.Size(),
})
}
}
for _, mediaPeerLink := range r.AllMediaPeerLinks() {
if _, found := duplicates[mediaPeerLink.URL]; !found {
duplicates[mediaPeerLink.URL] = true
enclosures = append(enclosures, &model.Enclosure{
URL: mediaPeerLink.URL,
MimeType: mediaPeerLink.MimeType(),
Size: mediaPeerLink.Size(),
})
}
}
return enclosures
}
func (r *rssItem) entryCommentsURL() string {
commentsURL := strings.TrimSpace(r.Comments)
if commentsURL != "" && urllib.IsAbsoluteURL(commentsURL) {
return commentsURL
}
return ""
type RSSSource struct {
URL string `xml:"url,attr"`
Name string `xml:",chardata"`
}