60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package atomfeed
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import (
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"mime"
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"net/url"
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"regexp"
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"strings"
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)
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type (
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EmailAddress string
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LanguageTag string
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MediaType string
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URI string
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)
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func isValidURL(uri URI) bool {
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_, err := url.ParseRequestURI(string(uri))
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return err == nil
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}
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func isValidURN(uri URI) bool {
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pattern := `\A(?i:urn:(?!urn:)(?<nid>[a-z0-9][a-z0-9-]{1,31}):(?<nss>(?:[-a-z0-9()+,.:=@;$_!*'&~\/]|%[0-9a-f]{2})+)(?:\?\+(?<rcomponent>.*?))?(?:\?=(?<qcomponent>.*?))?(?:#(?<fcomponent>.*?))?)\z`
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return regexp.MustCompile(pattern).MatchString(string(uri))
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}
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func isValidURI(uri URI) bool {
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return isValidURL(uri) || isValidURN(uri)
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}
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func isCorrectlyEscaped(text string) bool {
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relevantEntities := []string{"&", "<", ">", """, "'"}
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for _, entity := range relevantEntities {
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if strings.Contains(text, entity) {
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return false
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}
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}
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return true
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}
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func isCompositeMediaType(mediaType string) bool {
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mediaType, _, err := mime.ParseMediaType(mediaType)
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if err != nil {
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return false
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}
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return strings.HasPrefix(mediaType, "multipart/") || strings.HasPrefix(mediaType, "message/")
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}
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func isXMLMediaType(mediaType string) bool {
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mediaType, _, err := mime.ParseMediaType(mediaType)
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if err != nil {
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return false
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}
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return strings.HasSuffix(mediaType, "/xml") || strings.HasSuffix(mediaType, "+xml")
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}
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