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Reuse a Reader instead of copying to a buffer when parsing an atom feed

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This commit is contained in:
jvoisin 2024-03-04 17:07:43 +01:00 • committed by Frédéric Guillot
parent c1ec77a42c
commit 111e3f2106
4 changed files with 64 additions and 67 deletions
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13
internal/reader/atom/parser.go
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@ -4,7 +4,6 @@
package atom // import "miniflux.app/v2/internal/reader/atom"
import (
"bytes"
"encoding/xml"
"fmt"
"io"
@ -18,25 +17,23 @@ type atomFeed interface {
}
// Parse returns a normalized feed struct from a Atom feed.
func Parse(baseURL string, r io.Reader) (*model.Feed, error) {
var buf bytes.Buffer
tee := io.TeeReader(r, &buf)
func Parse(baseURL string, r io.ReadSeeker) (*model.Feed, error) {
var rawFeed atomFeed
if getAtomFeedVersion(tee) == "0.3" {
if getAtomFeedVersion(r) == "0.3" {
rawFeed = new(atom03Feed)
} else {
rawFeed = new(atom10Feed)
}
r.Seek(0, io.SeekStart)
if err := xml_decoder.NewXMLDecoder(&buf).Decode(rawFeed); err != nil {
if err := xml_decoder.NewXMLDecoder(r).Decode(rawFeed); err != nil {
return nil, fmt.Errorf("atom: unable to parse feed: %w", err)
}
return rawFeed.Transform(baseURL), nil
}
func getAtomFeedVersion(data io.Reader) string {
func getAtomFeedVersion(data io.ReadSeeker) string {
decoder := xml_decoder.NewXMLDecoder(data)
for {
token, _ := decoder.Token()