/
wellknown.go
70 lines (62 loc) · 1.37 KB
/
wellknown.go
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package find
import (
"bytes"
"io"
"net/url"
"github.com/mmcdole/gofeed"
)
func tryWellKnown(baseURL string) ([]Feed, error) {
wellKnown := []string{
"atom.xml",
"feed.xml",
"rss.xml",
"index.xml",
"atom.json",
"feed.json",
"rss.json",
"index.json",
"feed/",
"rss/",
}
feeds := make([]Feed, 0)
for _, suffix := range wellKnown {
newTarget, err := url.JoinPath(baseURL, suffix)
if err != nil {
continue
}
feed, err := parseRSSUrl(newTarget)
if err != nil {
continue
}
if !isEmptyFeed(feed) {
feed.Link = newTarget // this may be more accurate than the link parsed from the rss content
feeds = append(feeds, feed)
}
}
return feeds, nil
}
func parseRSSUrl(url string) (Feed, error) {
resp, err := request(url)
if err != nil {
return Feed{}, err
}
defer resp.Body.Close()
content, err := io.ReadAll(resp.Body)
if err != nil {
return Feed{}, err
}
return parseRSSContent(content)
}
func parseRSSContent(content []byte) (Feed, error) {
parsed, err := gofeed.NewParser().Parse(bytes.NewReader(content))
if err != nil || parsed == nil {
return Feed{}, err
}
return Feed{
// https://github.com/mmcdole/gofeed#default-mappings
Title: parsed.Title,
// set as default value, but the value parsed from rss are not always accurate.
// it is better to use the url that gets the rss content.
Link: parsed.FeedLink,
}, nil
}