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Fix markdown escaping wrongly passing html through #28363

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merged 2 commits into from
Nov 4, 2024
Merged

Fix markdown escaping wrongly passing html through #28363

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Fix markdown escaping wrongly passing html through
t3chguy Nov 1, 2024
10e37a2
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t3chguy Nov 4, 2024
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5 changes: 4 additions & 1 deletion src/Markdown.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -383,6 +383,9 @@ export default class Markdown {
if (isMultiLine(node) && node.next) this.lit("\n\n");
};

return renderer.render(this.parsed);
// We inhibit the default escape function as we escape the entire output string to correctly handle backslashes
renderer.esc = (input: string) => input;
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Can you add a comment here explaining why there's no escaping done here?


return escape(renderer.render(this.parsed));
}
}
16 changes: 15 additions & 1 deletion test/unit-tests/editor/serialize-test.ts
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Expand Up @@ -9,7 +9,7 @@ Please see LICENSE files in the repository root for full details.
import { mocked } from "jest-mock";

import EditorModel from "../../../src/editor/model";
import { htmlSerializeIfNeeded } from "../../../src/editor/serialize";
import { htmlSerializeFromMdIfNeeded, htmlSerializeIfNeeded } from "../../../src/editor/serialize";
import { createPartCreator } from "./mock";
import { IConfigOptions } from "../../../src/IConfigOptions";
import SettingsStore from "../../../src/settings/SettingsStore";
Expand Down Expand Up @@ -71,6 +71,12 @@ describe("editor/serialize", function () {
const html = htmlSerializeIfNeeded(model, {});
expect(html).toBe("*hello* world");
});
it("escaped markdown should not retain backslashes around other markdown", function () {
const pc = createPartCreator();
const model = new EditorModel([pc.plain("\\*hello\\* **world**")], pc);
const html = htmlSerializeIfNeeded(model, {});
expect(html).toBe("*hello* <strong>world</strong>");
});
it("escaped markdown should convert HTML entities", function () {
const pc = createPartCreator();
const model = new EditorModel([pc.plain("\\*hello\\* world < hey world!")], pc);
Expand Down Expand Up @@ -153,6 +159,14 @@ describe("editor/serialize", function () {
const html = htmlSerializeIfNeeded(model, { forceHTML: true, useMarkdown: false });
expect(html).toBe("hello world");
});
it("should treat tags not in allowlist as plaintext", () => {
const html = htmlSerializeFromMdIfNeeded("<b>test</b>", {});
expect(html).toBeUndefined();
});
it("should treat tags not in allowlist as plaintext even if escaped", () => {
const html = htmlSerializeFromMdIfNeeded("\\<b>test</b>", {});
expect(html).toBe("&lt;b&gt;test&lt;/b&gt;");
});
});

describe("feature_latex_maths", () => {
Expand Down
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