mirror of
https://salsa.debian.org/mdosch/feed-to-muc.git
synced 2024-09-20 15:30:18 +02:00
177 lines
6.9 KiB
Go
177 lines
6.9 KiB
Go
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package shared
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import (
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"strings"
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"github.com/mmcdole/gofeed/extensions"
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"github.com/mmcdole/goxpp"
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)
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// IsExtension returns whether or not the current
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// XML element is an extension element (if it has a
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// non empty prefix)
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func IsExtension(p *xpp.XMLPullParser) bool {
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space := strings.TrimSpace(p.Space)
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if prefix, ok := p.Spaces[space]; ok {
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return !(prefix == "" || prefix == "rss" || prefix == "rdf" || prefix == "content")
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}
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return p.Space != ""
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}
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// ParseExtension parses the current element of the
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// XMLPullParser as an extension element and updates
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// the extension map
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func ParseExtension(fe ext.Extensions, p *xpp.XMLPullParser) (ext.Extensions, error) {
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prefix := prefixForNamespace(p.Space, p)
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result, err := parseExtensionElement(p)
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if err != nil {
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return nil, err
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}
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// Ensure the extension prefix map exists
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if _, ok := fe[prefix]; !ok {
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fe[prefix] = map[string][]ext.Extension{}
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}
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// Ensure the extension element slice exists
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if _, ok := fe[prefix][p.Name]; !ok {
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fe[prefix][p.Name] = []ext.Extension{}
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}
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fe[prefix][p.Name] = append(fe[prefix][p.Name], result)
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return fe, nil
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}
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func parseExtensionElement(p *xpp.XMLPullParser) (e ext.Extension, err error) {
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if err = p.Expect(xpp.StartTag, "*"); err != nil {
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return e, err
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}
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e.Name = p.Name
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e.Children = map[string][]ext.Extension{}
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e.Attrs = map[string]string{}
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for _, attr := range p.Attrs {
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// TODO: Alright that we are stripping
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// namespace information from attributes ?
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e.Attrs[attr.Name.Local] = attr.Value
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}
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for {
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tok, err := p.Next()
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if err != nil {
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return e, err
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}
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if tok == xpp.EndTag {
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break
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}
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if tok == xpp.StartTag {
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child, err := parseExtensionElement(p)
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if err != nil {
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return e, err
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}
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if _, ok := e.Children[child.Name]; !ok {
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e.Children[child.Name] = []ext.Extension{}
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}
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e.Children[child.Name] = append(e.Children[child.Name], child)
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} else if tok == xpp.Text {
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e.Value += p.Text
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}
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}
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e.Value = strings.TrimSpace(e.Value)
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if err = p.Expect(xpp.EndTag, e.Name); err != nil {
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return e, err
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}
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return e, nil
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}
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func prefixForNamespace(space string, p *xpp.XMLPullParser) string {
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// First we check if the global namespace map
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// contains an entry for this namespace/prefix.
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// This way we can use the canonical prefix for this
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// ns instead of the one defined in the feed.
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if prefix, ok := canonicalNamespaces[space]; ok {
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return prefix
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}
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// Next we check if the feed itself defined this
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// this namespace and return it if we have a result.
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if prefix, ok := p.Spaces[space]; ok {
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return prefix
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}
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// Lastly, any namespace which is not defined in the
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// the feed will be the prefix itself when using Go's
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// xml.Decoder.Token() method.
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return space
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}
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// Namespaces taken from github.com/kurtmckee/feedparser
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// These are used for determining canonical name space prefixes
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// for many of the popular RSS/Atom extensions.
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//
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// These canonical prefixes override any prefixes used in the feed itself.
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var canonicalNamespaces = map[string]string{
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"http://webns.net/mvcb/": "admin",
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"http://purl.org/rss/1.0/modules/aggregation/": "ag",
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"http://purl.org/rss/1.0/modules/annotate/": "annotate",
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"http://media.tangent.org/rss/1.0/": "audio",
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"http://backend.userland.com/blogChannelModule": "blogChannel",
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"http://creativecommons.org/ns#license": "cc",
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"http://web.resource.org/cc/": "cc",
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"http://cyber.law.harvard.edu/rss/creativeCommonsRssModule.html": "creativeCommons",
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"http://backend.userland.com/creativeCommonsRssModule": "creativeCommons",
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"http://purl.org/rss/1.0/modules/company": "co",
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"http://purl.org/rss/1.0/modules/content/": "content",
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"http://my.theinfo.org/changed/1.0/rss/": "cp",
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"http://purl.org/dc/elements/1.1/": "dc",
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"http://purl.org/dc/terms/": "dcterms",
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"http://purl.org/rss/1.0/modules/email/": "email",
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"http://purl.org/rss/1.0/modules/event/": "ev",
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"http://rssnamespace.org/feedburner/ext/1.0": "feedburner",
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"http://freshmeat.net/rss/fm/": "fm",
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"http://xmlns.com/foaf/0.1/": "foaf",
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"http://www.w3.org/2003/01/geo/wgs84_pos#": "geo",
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"http://www.georss.org/georss": "georss",
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"http://www.opengis.net/gml": "gml",
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"http://postneo.com/icbm/": "icbm",
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"http://purl.org/rss/1.0/modules/image/": "image",
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"http://www.itunes.com/DTDs/PodCast-1.0.dtd": "itunes",
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"http://example.com/DTDs/PodCast-1.0.dtd": "itunes",
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"http://purl.org/rss/1.0/modules/link/": "l",
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"http://search.yahoo.com/mrss": "media",
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"http://search.yahoo.com/mrss/": "media",
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"http://madskills.com/public/xml/rss/module/pingback/": "pingback",
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"http://prismstandard.org/namespaces/1.2/basic/": "prism",
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"http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
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"http://www.w3.org/2000/01/rdf-schema#": "rdfs",
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"http://purl.org/rss/1.0/modules/reference/": "ref",
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"http://purl.org/rss/1.0/modules/richequiv/": "reqv",
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"http://purl.org/rss/1.0/modules/search/": "search",
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"http://purl.org/rss/1.0/modules/slash/": "slash",
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"http://schemas.xmlsoap.org/soap/envelope/": "soap",
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"http://purl.org/rss/1.0/modules/servicestatus/": "ss",
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"http://hacks.benhammersley.com/rss/streaming/": "str",
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"http://purl.org/rss/1.0/modules/subscription/": "sub",
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"http://purl.org/rss/1.0/modules/syndication/": "sy",
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"http://schemas.pocketsoap.com/rss/myDescModule/": "szf",
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"http://purl.org/rss/1.0/modules/taxonomy/": "taxo",
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"http://purl.org/rss/1.0/modules/threading/": "thr",
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"http://purl.org/rss/1.0/modules/textinput/": "ti",
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"http://madskills.com/public/xml/rss/module/trackback/": "trackback",
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"http://wellformedweb.org/commentAPI/": "wfw",
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"http://purl.org/rss/1.0/modules/wiki/": "wiki",
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"http://www.w3.org/1999/xhtml": "xhtml",
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"http://www.w3.org/1999/xlink": "xlink",
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"http://www.w3.org/XML/1998/namespace": "xml",
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"http://podlove.org/simple-chapters": "psc",
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}
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