48 lines
1.6 KiB
JavaScript
48 lines
1.6 KiB
JavaScript
import {
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collapseDuplicateTrailingSlashes,
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hasFileExtension,
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isInternalPath
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} from "@astrojs/internal-helpers/path";
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import { trailingSlashMismatchTemplate } from "../template/4xx.js";
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import { writeHtmlResponse, writeRedirectResponse } from "./response.js";
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function evaluateTrailingSlash(pathname, search, trailingSlash) {
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if (isInternalPath(pathname)) {
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return { action: "next" };
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}
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const collapsed = collapseDuplicateTrailingSlashes(pathname, true);
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if (pathname && collapsed !== pathname) {
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return { action: "redirect", status: 301, location: `${collapsed}${search}` };
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}
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if (trailingSlash === "never" && pathname.endsWith("/") && pathname !== "/" || trailingSlash === "always" && !pathname.endsWith("/") && !hasFileExtension(pathname)) {
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return { action: "reject", status: 404, pathname };
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}
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return { action: "next" };
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}
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function trailingSlashMiddleware(settings) {
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const { trailingSlash } = settings.config;
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return function devTrailingSlash(req, res, next) {
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const url = new URL(`http://localhost${req.url}`);
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let pathname;
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try {
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pathname = decodeURI(url.pathname);
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} catch (e) {
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return next(e);
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}
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const decision = evaluateTrailingSlash(pathname, url.search, trailingSlash);
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switch (decision.action) {
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case "redirect":
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return writeRedirectResponse(res, decision.status, decision.location);
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case "reject": {
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const html = trailingSlashMismatchTemplate(decision.pathname, trailingSlash);
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return writeHtmlResponse(res, decision.status, html);
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}
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case "next":
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return next();
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}
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};
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}
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export {
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evaluateTrailingSlash,
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trailingSlashMiddleware
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};
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