28 lines
810 B
TypeScript
28 lines
810 B
TypeScript
export async function onRequestGet(context: RequestContext) {
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const attachment = context.params.id as string;
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const unsignedURL = `https://mediaproxy.carcrushers.cc/${attachment}?Expires=${(
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Math.round(Date.now() / 1000) + 1800
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).toString()}`;
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const signingKey = await crypto.subtle.importKey(
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"raw",
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Uint8Array.from(atob(context.env.URL_SIGNING_KEY), (c) => c.charCodeAt(0)),
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{ hash: "SHA-1", name: "HMAC" },
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false,
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["sign"],
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);
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const signature = await crypto.subtle.sign(
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"HMAC",
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signingKey,
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new TextEncoder().encode(unsignedURL),
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);
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return Response.redirect(
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`${unsignedURL}&Signature=${btoa(
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String.fromCodePoint(...new Uint8Array(signature)),
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)
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.replaceAll("+", "-")
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.replaceAll("/", "_")
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.replaceAll("=", "")}`,
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);
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}
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