59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
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// Copyright 2018 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package parser // import "miniflux.app/reader/parser"
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import (
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"strings"
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"miniflux.app/errors"
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"miniflux.app/logger"
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"miniflux.app/model"
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"miniflux.app/reader/atom"
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"miniflux.app/reader/json"
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"miniflux.app/reader/rdf"
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"miniflux.app/reader/rss"
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)
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// ParseFeed analyzes the input data and returns a normalized feed object.
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func ParseFeed(data string) (*model.Feed, *errors.LocalizedError) {
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data = stripInvalidXMLCharacters(data)
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switch DetectFeedFormat(data) {
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case FormatAtom:
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return atom.Parse(strings.NewReader(data))
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case FormatRSS:
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return rss.Parse(strings.NewReader(data))
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case FormatJSON:
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return json.Parse(strings.NewReader(data))
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case FormatRDF:
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return rdf.Parse(strings.NewReader(data))
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default:
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return nil, errors.NewLocalizedError("Unsupported feed format")
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}
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}
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func stripInvalidXMLCharacters(input string) string {
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return strings.Map(func(r rune) rune {
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if isInCharacterRange(r) {
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return r
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}
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logger.Debug("Strip invalid XML characters: %U", r)
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return -1
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}, input)
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}
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// Decide whether the given rune is in the XML Character Range, per
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// the Char production of http://www.xml.com/axml/testaxml.htm,
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// Section 2.2 Characters.
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func isInCharacterRange(r rune) (inrange bool) {
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return r == 0x09 ||
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r == 0x0A ||
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r == 0x0D ||
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r >= 0x20 && r <= 0xDF77 ||
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r >= 0xE000 && r <= 0xFFFD ||
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r >= 0x10000 && r <= 0x10FFFF
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}
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