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16 lines
537 B
TypeScript
16 lines
537 B
TypeScript
// enable file link URLs in MarkdownIt. Keeps other URL restrictions of MarkdownIt untouched.
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// Format [link name](file://...)
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export default function(url: string) {
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const BAD_PROTO_RE = /^(vbscript|javascript|data):/;
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const GOOD_DATA_RE = /^data:image\/(gif|png|jpeg|webp);/;
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// url should be normalized at this point, and existing entities are decoded
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const str = url.trim().toLowerCase();
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if (str.indexOf('data:image/svg+xml,') === 0) {
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return true;
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}
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return BAD_PROTO_RE.test(str) ? (!!GOOD_DATA_RE.test(str)) : true;
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}
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