61 lines
1.7 KiB
TypeScript
61 lines
1.7 KiB
TypeScript
import { NextResponse } from "next/server"
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const MAX_ICS_BYTES = 2 * 1024 * 1024
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function isAllowedIcsUrl(raw: string): boolean {
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try {
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const url = new URL(raw)
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if (url.protocol !== "http:" && url.protocol !== "https:") return false
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const host = url.hostname.toLowerCase()
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if (host === "localhost" || host === "127.0.0.1" || host === "::1") {
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return false
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}
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return true
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} catch {
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return false
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}
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}
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export async function GET(request: Request) {
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const url = new URL(request.url).searchParams.get("url")?.trim()
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if (!url || !isAllowedIcsUrl(url)) {
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return NextResponse.json({ error: "invalid_url" }, { status: 400 })
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}
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try {
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const res = await fetch(url, {
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headers: { Accept: "text/calendar, text/plain, */*" },
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redirect: "follow",
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cache: "no-store",
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})
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if (!res.ok) {
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return NextResponse.json({ error: "fetch_failed" }, { status: 502 })
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}
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const contentType = res.headers.get("content-type") ?? ""
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if (
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contentType &&
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!contentType.includes("text/calendar") &&
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!contentType.includes("text/plain") &&
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!contentType.includes("application/octet-stream")
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) {
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return NextResponse.json({ error: "unsupported_content_type" }, { status: 415 })
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}
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const buffer = await res.arrayBuffer()
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if (buffer.byteLength > MAX_ICS_BYTES) {
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return NextResponse.json({ error: "payload_too_large" }, { status: 413 })
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}
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return new NextResponse(new TextDecoder("utf-8").decode(buffer), {
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status: 200,
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headers: {
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"Content-Type": "text/calendar; charset=utf-8",
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"Cache-Control": "private, max-age=300",
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},
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})
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} catch {
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return NextResponse.json({ error: "fetch_failed" }, { status: 502 })
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}
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}
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