118 lines
3.3 KiB
JavaScript
118 lines
3.3 KiB
JavaScript
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"use strict";
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const path = require("path");
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const {
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parse
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} = require("url");
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const querystring = require("querystring");
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const getPaths = require("./getPaths");
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/** @typedef {import("../index.js").IncomingMessage} IncomingMessage */
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/** @typedef {import("../index.js").ServerResponse} ServerResponse */
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const cacheStore = new WeakMap();
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/**
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* @param {Function} fn
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* @param {{ cache?: Map<any, any> }} [cache]
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* @returns {any}
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*/
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// @ts-ignore
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const mem = (fn, {
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cache = new Map()
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} = {}) => {
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/**
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* @param {any} arguments_
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* @return {any}
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*/
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const memoized = (...arguments_) => {
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const [key] = arguments_;
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const cacheItem = cache.get(key);
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if (cacheItem) {
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return cacheItem.data;
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}
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const result = fn.apply(void 0, arguments_);
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cache.set(key, {
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data: result
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});
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return result;
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};
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cacheStore.set(memoized, cache);
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return memoized;
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};
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const memoizedParse = mem(parse);
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/**
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* @template {IncomingMessage} Request
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* @template {ServerResponse} Response
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* @param {import("../index.js").Context<Request, Response>} context
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* @param {string} url
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* @returns {string | undefined}
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*/
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function getFilenameFromUrl(context, url) {
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const {
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options
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} = context;
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const paths = getPaths(context);
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let foundFilename;
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let urlObject;
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try {
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// The `url` property of the `request` is contains only `pathname`, `search` and `hash`
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urlObject = memoizedParse(url, false, true);
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} catch (_ignoreError) {
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return;
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}
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for (const {
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publicPath,
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outputPath
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} of paths) {
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let filename;
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let publicPathObject;
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try {
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publicPathObject = memoizedParse(publicPath !== "auto" && publicPath ? publicPath : "/", false, true);
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} catch (_ignoreError) {
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// eslint-disable-next-line no-continue
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continue;
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}
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if (urlObject.pathname && urlObject.pathname.startsWith(publicPathObject.pathname)) {
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filename = outputPath;
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// Strip the `pathname` property from the `publicPath` option from the start of requested url
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// `/complex/foo.js` => `foo.js`
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const pathname = urlObject.pathname.slice(publicPathObject.pathname.length);
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if (pathname) {
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filename = path.join(outputPath, querystring.unescape(pathname));
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}
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let fsStats;
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try {
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fsStats = /** @type {import("fs").statSync} */
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context.outputFileSystem.statSync(filename);
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} catch (_ignoreError) {
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// eslint-disable-next-line no-continue
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continue;
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}
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if (fsStats.isFile()) {
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foundFilename = filename;
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break;
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} else if (fsStats.isDirectory() && (typeof options.index === "undefined" || options.index)) {
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const indexValue = typeof options.index === "undefined" || typeof options.index === "boolean" ? "index.html" : options.index;
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filename = path.join(filename, indexValue);
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try {
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fsStats = /** @type {import("fs").statSync} */
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context.outputFileSystem.statSync(filename);
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} catch (__ignoreError) {
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// eslint-disable-next-line no-continue
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continue;
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}
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if (fsStats.isFile()) {
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foundFilename = filename;
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break;
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}
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}
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}
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}
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// eslint-disable-next-line consistent-return
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return foundFilename;
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}
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module.exports = getFilenameFromUrl;
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