51 lines
1.4 KiB
TypeScript
51 lines
1.4 KiB
TypeScript
import type { ReadonlyHeaders } from "next/dist/server/web/spec-extension/adapters/headers";
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export const removeTrailingSlash = (path: string) => {
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let end = path.length;
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while (end > 0 && path.charAt(end - 1) === "/") {
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end--;
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}
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return path.slice(0, end);
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};
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export const extractBaseUrlFromHeaders = (
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headers: ReadonlyHeaders,
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fallbackProtocol: "http" | "https" = "http",
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): `${string}://${string}` => {
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// For empty string we also use the fallback protocol
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// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
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let protocol = headers.get("x-forwarded-proto") || fallbackProtocol;
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// @see https://support.glitch.com/t/x-forwarded-proto-contains-multiple-protocols/17219
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if (protocol.includes(",")) {
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protocol = protocol.includes("https") ? "https" : "http";
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}
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const host = headers.get("x-forwarded-host") ?? headers.get("host");
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return `${protocol}://${host}`;
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};
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export const getPortFromUrl = (url: URL): number => {
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const port = url.port;
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if (port) {
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return Number(port);
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}
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if (url.protocol === "https:") {
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return 443;
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}
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if (url.protocol === "http:") {
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return 80;
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}
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throw new Error(`Unsupported protocol: ${url.protocol}`);
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};
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const absoluteUrlRegex = /^[a-z]+:(\/\/)?/;
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export const isAbsoluteUrl = (urlOrPath: string): boolean => {
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return absoluteUrlRegex.test(urlOrPath.toLowerCase());
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};
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