48 lines
1.3 KiB
TypeScript
48 lines
1.3 KiB
TypeScript
#!/usr/bin/env -S npx tsx
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/**
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* Generate a signed preview URL for local testing.
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*
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* Usage:
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* npx tsx sign-url.ts [source] [preview]
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*
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* Defaults:
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* source: http://localhost:4321
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* preview: http://localhost:4322
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* secret: reads PREVIEW_SECRET from .dev.vars, falls back to "dev-secret"
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*/
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import { readFileSync } from "node:fs";
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const source = process.argv[2] || "http://localhost:4321";
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const preview = process.argv[3] || "http://localhost:4322";
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let secret = "dev-secret";
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try {
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const devVars = readFileSync(new URL(".dev.vars", import.meta.url), "utf-8");
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const match = devVars.match(/^PREVIEW_SECRET\s*=\s*"?([^"\n]+)"?/m);
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if (match) secret = match[1]!;
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} catch {
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// no .dev.vars, use default
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}
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const exp = Math.floor(Date.now() / 1000) + 3600;
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const encoder = new TextEncoder();
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const key = await crypto.subtle.importKey(
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"raw",
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encoder.encode(secret),
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{ name: "HMAC", hash: "SHA-256" },
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false,
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["sign"],
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);
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const sigBuffer = await crypto.subtle.sign("HMAC", key, encoder.encode(`${source}:${exp}`));
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const sig = Array.from(new Uint8Array(sigBuffer), (b) => b.toString(16).padStart(2, "0")).join("");
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const url = new URL(preview);
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url.searchParams.set("source", source);
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url.searchParams.set("exp", String(exp));
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url.searchParams.set("sig", sig);
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console.log(url.toString());
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