File size: 2,066 Bytes
489b6e2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | import { NextRequest, NextResponse } from "next/server";
import { readSession } from "./session";
import { requestOrigin } from "./request-origin";
type RateState = { count: number; resetAt: number };
type ApiGlobal = typeof globalThis & { hipcampRateLimits?: Map<string, RateState> };
const apiGlobal = globalThis as ApiGlobal;
export function rejectCrossOrigin(request: NextRequest) {
const origin = request.headers.get("origin");
if (origin && origin !== requestOrigin(request)) {
return NextResponse.json({ error: "Cross-origin requests are not allowed." }, { status: 403 });
}
return null;
}
export async function requireUser(request: NextRequest) {
const user = await readSession(request);
if (!user) return { error: NextResponse.json({ error: "Sign in required." }, { status: 401 }) };
return { user };
}
export function cleanText(value: unknown, maxLength: number) {
if (typeof value !== "string") return "";
return value.trim().slice(0, maxLength);
}
function requestIp(request: NextRequest) {
const forwarded = request.headers.get("cf-connecting-ip") || request.headers.get("x-forwarded-for") || "local";
return forwarded.split(",")[0].trim() || "local";
}
export function rateLimit(request: NextRequest, bucket: string, limit = 24, windowMs = 60_000) {
const now = Date.now();
const key = `${bucket}:${requestIp(request)}`;
const store = apiGlobal.hipcampRateLimits ?? new Map<string, RateState>();
apiGlobal.hipcampRateLimits = store;
for (const [entryKey, value] of store) {
if (value.resetAt <= now) store.delete(entryKey);
}
const current = store.get(key);
if (!current || current.resetAt <= now) {
store.set(key, { count: 1, resetAt: now + windowMs });
return null;
}
current.count += 1;
if (current.count > limit) {
const retryAfter = Math.max(1, Math.ceil((current.resetAt - now) / 1000));
return NextResponse.json(
{ error: "Too many attempts. Try again shortly." },
{ status: 429, headers: { "retry-after": String(retryAfter) } },
);
}
return null;
}
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