feed-to-muc/vendor/github.com/mmcdole/gofeed/detector.go

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package gofeed
import (
"io"
"strings"
"github.com/mmcdole/gofeed/internal/shared"
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xpp "github.com/mmcdole/goxpp"
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)
// FeedType represents one of the possible feed
// types that we can detect.
type FeedType int
const (
// FeedTypeUnknown represents a feed that could not have its
// type determiend.
FeedTypeUnknown FeedType = iota
// FeedTypeAtom repesents an Atom feed
FeedTypeAtom
// FeedTypeRSS represents an RSS feed
FeedTypeRSS
)
// DetectFeedType attempts to determine the type of feed
// by looking for specific xml elements unique to the
// various feed types.
func DetectFeedType(feed io.Reader) FeedType {
p := xpp.NewXMLPullParser(feed, false, shared.NewReaderLabel)
xmlBase := shared.XMLBase{}
_, err := xmlBase.FindRoot(p)
if err != nil {
return FeedTypeUnknown
}
name := strings.ToLower(p.Name)
switch name {
case "rdf":
return FeedTypeRSS
case "rss":
return FeedTypeRSS
case "feed":
return FeedTypeAtom
default:
return FeedTypeUnknown
}
}