86 lines
2.5 KiB
JavaScript
86 lines
2.5 KiB
JavaScript
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import defu from "defu";
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import {
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createError,
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eventHandler,
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proxyRequest,
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sendRedirect,
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setHeaders
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} from "h3";
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import { createRouter as createRadixRouter, toRouteMatcher } from "radix3";
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import { getQuery, joinURL, withQuery, withoutBase } from "ufo";
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import { useRuntimeConfig } from "./config.mjs";
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import {
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isPathInScope,
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isTargetInScope,
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resolveRedirectTarget
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} from "./route-rules-utils.mjs";
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const config = useRuntimeConfig();
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const _routeRulesMatcher = toRouteMatcher(
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createRadixRouter({ routes: config.nitro.routeRules })
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);
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export function createRouteRulesHandler(ctx) {
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return eventHandler((event) => {
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const routeRules = getRouteRules(event);
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if (routeRules.headers) {
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setHeaders(event, routeRules.headers);
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}
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if (routeRules.redirect) {
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const target = resolveRedirectTarget(
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event.path,
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routeRules.redirect.to,
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routeRules.redirect._redirectStripBase
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);
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if (target === void 0) {
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throw createError({ statusCode: 400 });
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}
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return sendRedirect(event, target, routeRules.redirect.statusCode);
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}
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if (routeRules.proxy) {
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const target = resolveRuleTarget(
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event,
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routeRules.proxy.to,
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routeRules.proxy._proxyStripBase
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);
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return proxyRequest(event, target, {
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fetch: ctx.localFetch,
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...routeRules.proxy
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});
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}
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});
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}
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function resolveRuleTarget(event, to, stripBase) {
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if (!to.endsWith("/**")) {
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if (event.path.includes("?")) {
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return withQuery(to, getQuery(event.path));
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}
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return to;
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}
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const targetBase = to.slice(0, -3);
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let targetPath = event.path;
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if (stripBase) {
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if (!isPathInScope(event.path.split("?")[0], stripBase)) {
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throw createError({ statusCode: 400 });
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}
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targetPath = withoutBase(targetPath, stripBase);
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} else if (targetPath.startsWith("//")) {
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targetPath = targetPath.replace(/^\/+/, "/");
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}
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const target = joinURL(targetBase, targetPath);
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if (!isTargetInScope(target, targetBase)) {
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throw createError({ statusCode: 400 });
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}
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return target;
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}
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export function getRouteRules(event) {
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event.context._nitro = event.context._nitro || {};
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if (!event.context._nitro.routeRules) {
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event.context._nitro.routeRules = getRouteRulesForPath(
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withoutBase(event.path.split("?")[0], useRuntimeConfig().app.baseURL)
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);
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}
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return event.context._nitro.routeRules;
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}
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export function getRouteRulesForPath(path) {
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return defu({}, ..._routeRulesMatcher.matchAll(path).reverse());
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}
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