61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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package atom // import "miniflux.app/reader/atom"
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import (
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"bytes"
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"encoding/xml"
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"io"
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"miniflux.app/errors"
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"miniflux.app/model"
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xml_decoder "miniflux.app/reader/xml"
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)
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type atomFeed interface {
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Transform(baseURL string) *model.Feed
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}
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// Parse returns a normalized feed struct from a Atom feed.
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func Parse(baseURL string, r io.Reader) (*model.Feed, *errors.LocalizedError) {
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var buf bytes.Buffer
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tee := io.TeeReader(r, &buf)
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var rawFeed atomFeed
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if getAtomFeedVersion(tee) == "0.3" {
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rawFeed = new(atom03Feed)
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} else {
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rawFeed = new(atom10Feed)
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}
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decoder := xml_decoder.NewDecoder(&buf)
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err := decoder.Decode(rawFeed)
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if err != nil {
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return nil, errors.NewLocalizedError("Unable to parse Atom feed: %q", err)
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}
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return rawFeed.Transform(baseURL), nil
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}
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func getAtomFeedVersion(data io.Reader) string {
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decoder := xml_decoder.NewDecoder(data)
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for {
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token, _ := decoder.Token()
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if token == nil {
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break
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}
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if element, ok := token.(xml.StartElement); ok {
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if element.Name.Local == "feed" {
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for _, attr := range element.Attr {
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if attr.Name.Local == "version" && attr.Value == "0.3" {
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return "0.3"
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}
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}
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return "1.0"
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}
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}
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}
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return "1.0"
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}
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