🌿 Collaborative wiki on ATProto
lichen.wiki
atproto
Add hasMath flag, XSS fix, conditional KaTeX CSS
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package.json
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package.json
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"dev": "bun run --watch src/server/index.ts",
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"dev:firehose": "bun run --watch src/firehose/index.ts",
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"build:fonts": "mkdir -p public/fonts && cp node_modules/katex/dist/fonts/* public/fonts/",
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"build:css": "bun run build:fonts && bunx @tailwindcss/cli -i public/style.css -o public/dist.css",
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"dev:css": "bun run build:fonts && bunx @tailwindcss/cli -i public/style.css -o public/dist.css --watch",
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"build:css": "mkdir -p public/fonts && cp node_modules/katex/dist/fonts/* public/fonts/ && cp node_modules/katex/dist/katex.min.css public/katex.css && bunx @tailwindcss/cli -i public/style.css -o public/dist.css",
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"dev:css": "mkdir -p public/fonts && cp node_modules/katex/dist/fonts/* public/fonts/ && cp node_modules/katex/dist/katex.min.css public/katex.css && bunx @tailwindcss/cli -i public/style.css -o public/dist.css --watch",
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"test": "bun test",
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"test:unit": "bun test tests/lib/ tests/atproto/ tests/firehose/ tests/server/",
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"test:integration": "bun test tests/integration/",
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public/katex.css
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public/katex.css
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@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(fonts/KaTeX_AMS-Regular.woff2) format("woff2"),url(fonts/KaTeX_AMS-Regular.woff) format("woff"),url(fonts/KaTeX_AMS-Regular.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Caligraphic-Bold.woff2) format("woff2"),url(fonts/KaTeX_Caligraphic-Bold.woff) format("woff"),url(fonts/KaTeX_Caligraphic-Bold.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Caligraphic-Regular.woff2) format("woff2"),url(fonts/KaTeX_Caligraphic-Regular.woff) format("woff"),url(fonts/KaTeX_Caligraphic-Regular.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Fraktur-Bold.woff2) format("woff2"),url(fonts/KaTeX_Fraktur-Bold.woff) format("woff"),url(fonts/KaTeX_Fraktur-Bold.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Fraktur-Regular.woff2) format("woff2"),url(fonts/KaTeX_Fraktur-Regular.woff) format("woff"),url(fonts/KaTeX_Fraktur-Regular.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Main-Bold.woff2) format("woff2"),url(fonts/KaTeX_Main-Bold.woff) format("woff"),url(fonts/KaTeX_Main-Bold.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(fonts/KaTeX_Main-BoldItalic.woff2) format("woff2"),url(fonts/KaTeX_Main-BoldItalic.woff) format("woff"),url(fonts/KaTeX_Main-BoldItalic.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(fonts/KaTeX_Main-Italic.woff2) format("woff2"),url(fonts/KaTeX_Main-Italic.woff) format("woff"),url(fonts/KaTeX_Main-Italic.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Main-Regular.woff2) format("woff2"),url(fonts/KaTeX_Main-Regular.woff) format("woff"),url(fonts/KaTeX_Main-Regular.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(fonts/KaTeX_Math-BoldItalic.woff2) format("woff2"),url(fonts/KaTeX_Math-BoldItalic.woff) format("woff"),url(fonts/KaTeX_Math-BoldItalic.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(fonts/KaTeX_Math-Italic.woff2) format("woff2"),url(fonts/KaTeX_Math-Italic.woff) format("woff"),url(fonts/KaTeX_Math-Italic.ttf) format("truetype")}@font-face{font-display:block;font-family:"KaTeX_SansSerif";font-style:normal;font-weight:700;src:url(fonts/KaTeX_SansSerif-Bold.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Bold.woff) format("woff"),url(fonts/KaTeX_SansSerif-Bold.ttf) format("truetype")}@font-face{font-display:block;font-family:"KaTeX_SansSerif";font-style:italic;font-weight:400;src:url(fonts/KaTeX_SansSerif-Italic.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Italic.woff) format("woff"),url(fonts/KaTeX_SansSerif-Italic.ttf) format("truetype")}@font-face{font-display:block;font-family:"KaTeX_SansSerif";font-style:normal;font-weight:400;src:url(fonts/KaTeX_SansSerif-Regular.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Regular.woff) format("woff"),url(fonts/KaTeX_SansSerif-Regular.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Script-Regular.woff2) format("woff2"),url(fonts/KaTeX_Script-Regular.woff) format("woff"),url(fonts/KaTeX_Script-Regular.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size1-Regular.woff2) 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.fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}
-1
public/style.css
-1
public/style.css
+2
src/lib/constants.ts
+2
src/lib/constants.ts
+4
-3
src/lib/markdown.ts
+4
-3
src/lib/markdown.ts
···
1
1
import MarkdownIt from "markdown-it";
2
+
import { type KatexPluginEnv, katexPlugin } from "./markdown/katex-plugin.ts";
2
3
import {
3
4
type WikilinkEnv,
4
5
wikilinkPlugin,
5
6
} from "./markdown/wikilink-plugin.ts";
6
-
import { katexPlugin } from "./markdown/katex-plugin.ts";
7
7
import { type VizPluginEnv, vizPlugin } from "./viz/plugin.ts";
8
8
9
9
interface RenderResult {
10
10
html: string;
11
11
hasViz: boolean;
12
+
hasMath: boolean;
12
13
}
13
14
14
-
interface MarkdownEnv extends VizPluginEnv, WikilinkEnv {}
15
+
interface MarkdownEnv extends VizPluginEnv, WikilinkEnv, KatexPluginEnv {}
15
16
16
17
const md = new MarkdownIt({ html: false, linkify: true });
17
18
···
63
64
): RenderResult {
64
65
const env: MarkdownEnv = wikiSlug ? { wikiSlug } : {};
65
66
const html = md.render(source, env);
66
-
return { html, hasViz: env.hasViz === true };
67
+
return { html, hasViz: env.hasViz === true, hasMath: env.hasMath === true };
67
68
}
68
69
69
70
/**
+17
-6
src/lib/markdown/katex-plugin.ts
+17
-6
src/lib/markdown/katex-plugin.ts
···
1
1
import katex from "katex";
2
2
import type MarkdownIt from "markdown-it";
3
+
import { escapeHtml } from "../html.ts";
3
4
4
5
interface KatexPluginOptions {
5
6
throwOnError?: boolean;
6
7
errorColor?: string;
7
8
displayMode?: boolean;
9
+
}
10
+
11
+
export interface KatexPluginEnv {
12
+
hasMath?: boolean;
8
13
}
9
14
10
15
function isValidDelim(state: MarkdownIt.StateInline, pos: number) {
···
133
138
return true;
134
139
}
135
140
136
-
function renderKatex(latex: string, options: KatexPluginOptions, displayMode: boolean) {
141
+
function renderKatex(
142
+
latex: string,
143
+
options: KatexPluginOptions,
144
+
displayMode: boolean,
145
+
env?: unknown,
146
+
) {
137
147
try {
148
+
if (env) (env as KatexPluginEnv).hasMath = true;
138
149
return katex.renderToString(latex, {
139
150
...options,
140
151
displayMode,
141
152
});
142
153
} catch (error) {
143
154
if (options.throwOnError) console.error(error);
144
-
return latex;
155
+
return escapeHtml(latex);
145
156
}
146
157
}
147
158
···
150
161
md.block.ruler.after("blockquote", "math_block", mathBlock, {
151
162
alt: ["paragraph", "reference", "blockquote", "list"],
152
163
});
153
-
md.renderer.rules.math_inline = (tokens, idx) =>
154
-
renderKatex(tokens[idx].content, options, false);
155
-
md.renderer.rules.math_block = (tokens, idx) =>
156
-
`<p>${renderKatex(tokens[idx].content, options, true)}</p>\n`;
164
+
md.renderer.rules.math_inline = (tokens, idx, _options, env) =>
165
+
renderKatex(tokens[idx].content, options, false, env);
166
+
md.renderer.rules.math_block = (tokens, idx, _options, env) =>
167
+
`<p>${renderKatex(tokens[idx].content, options, true, env)}</p>\n`;
157
168
}
+7
-2
src/server/routes/note.ts
+7
-2
src/server/routes/note.ts
···
1
1
import { Elysia } from "elysia";
2
2
import { getAtprotoEnv } from "../../atproto/env.ts";
3
3
import { resolveWikiContext } from "../../lib/access.ts";
4
-
import { EDITOR_SCRIPTS, VIZ_SCRIPTS } from "../../lib/constants.ts";
4
+
import {
5
+
EDITOR_SCRIPTS,
6
+
KATEX_STYLESHEETS,
7
+
VIZ_SCRIPTS,
8
+
} from "../../lib/constants.ts";
5
9
import { NotFoundError, ValidationError } from "../../lib/errors.ts";
6
10
import { t } from "../../lib/i18n/index.ts";
7
11
import { exportNoteMd } from "../../lib/import-export/export.ts";
···
124
128
throw new NotFoundError("Note not found");
125
129
}
126
130
127
-
const { html, hasViz } = renderMarkdown(
131
+
const { html, hasViz, hasMath } = renderMarkdown(
128
132
data.current.content,
129
133
params.wikiSlug,
130
134
);
···
146
150
html,
147
151
{
148
152
...(hasViz && { scripts: VIZ_SCRIPTS }),
153
+
...(hasMath && { stylesheets: KATEX_STYLESHEETS }),
149
154
session: ctx.session,
150
155
sidebarNotes,
151
156
currentNoteSlug: params.noteSlug,
+3
-2
src/server/routes/wiki.ts
+3
-2
src/server/routes/wiki.ts
···
6
6
resolveWikiContext,
7
7
resolveWikiContextSoft,
8
8
} from "../../lib/access.ts";
9
-
import { VIZ_SCRIPTS } from "../../lib/constants.ts";
9
+
import { KATEX_STYLESHEETS, VIZ_SCRIPTS } from "../../lib/constants.ts";
10
10
import {
11
11
ForbiddenError,
12
12
ImportError,
···
233
233
const bmHtml = resolveBookmarkHtml(ctx.did, ctx.wiki.at_uri, msg);
234
234
235
235
if (homeData) {
236
-
const { html, hasViz } = renderMarkdown(
236
+
const { html, hasViz, hasMath } = renderMarkdown(
237
237
homeData.current.content,
238
238
params.wikiSlug,
239
239
);
···
253
253
html,
254
254
{
255
255
...(hasViz && { scripts: VIZ_SCRIPTS }),
256
+
...(hasMath && { stylesheets: KATEX_STYLESHEETS }),
256
257
session: ctx.session,
257
258
sidebarNotes,
258
259
currentNoteSlug: "home",
+6
src/views/layout.ts
+6
src/views/layout.ts
···
19
19
20
20
export interface LayoutOptions {
21
21
scripts?: string[];
22
+
stylesheets?: string[];
22
23
session?: { did: string; handle: string } | null;
23
24
wikiName?: string;
24
25
wikiSlug?: string;
···
125
126
.map((src) => ` <script src="${src}"></script>`)
126
127
.join("\n");
127
128
129
+
const extraStyles = (options?.stylesheets ?? [])
130
+
.map((href) => ` <link rel="stylesheet" href="${href}">`)
131
+
.join("\n");
132
+
128
133
const locale = options?.locale ?? "en";
129
134
const msg = t(locale);
130
135
···
185
190
: ""
186
191
}
187
192
<link rel="stylesheet" href="/public/dist.css">
193
+
${extraStyles}
188
194
<script src="https://unpkg.com/htmx.org@2.0.4"></script>
189
195
${extraScripts}
190
196
</head>
+22
tests/lib/markdown.test.ts
+22
tests/lib/markdown.test.ts
···
25
25
expect(html).toContain("katex-mathml");
26
26
expect(html).toContain(String.raw`\int_0^1 x^2 \; dx`);
27
27
});
28
+
29
+
test("escapes invalid KaTeX to prevent XSS", () => {
30
+
const malicious = "$<img src=x onerror=alert(1)>";
31
+
const { html } = renderMarkdown(malicious);
32
+
expect(html).not.toContain("<img");
33
+
expect(html).toContain("<img");
34
+
});
35
+
36
+
test("hasMath is true for inline math", () => {
37
+
const result = renderMarkdown("Energy is $E = mc^2$.");
38
+
expect(result.hasMath).toBe(true);
39
+
});
40
+
41
+
test("hasMath is true for block math", () => {
42
+
const result = renderMarkdown("$$\\int_0^1 x^2 \\; dx$$");
43
+
expect(result.hasMath).toBe(true);
44
+
});
45
+
46
+
test("hasMath is false when no math present", () => {
47
+
const result = renderMarkdown("Just plain text.");
48
+
expect(result.hasMath).toBe(false);
49
+
});
28
50
});
29
51
30
52
describe("wikilinks", () => {