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/*! * Port of parseUrl (https://github.com/pillarjs/parseUrl) for Deno. * * Licensed as follows: * * (The MIT License) *  * Copyright (c) 2014 Jonathan Ong <me@jongleberry.com> * Copyright (c) 2014-2017 Douglas Christopher Wilson <doug@somethingdoug.com> *  * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * 'Software'), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: *  * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. *  * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *  */
import { Request, ParsedURL } from "../types.ts";
/** * Parse the `req` url with memoization. * * @param {Request} req * @return {ParsedURL} * @public */export function parseUrl(req: Request): ParsedURL | undefined {  const url = req.url;
  if (url === undefined) {    // URL is undefined    return undefined;  }
  let parsed = req._parsedUrl;
  if (fresh(url, parsed)) {    // Return cached URL parse    return parsed;  }
  // Parse the URL  parsed = fastParse(url);  parsed._raw = url;
  return (req._parsedUrl = parsed);}
/** * Parse the `req` original url with fallback and memoization. * * @param {Request} req * @return {Object} * @public */export function originalUrl(req: Request): ParsedURL | undefined {  const url = req.originalUrl;
  if (typeof url !== "string") {    // Fallback    return parseUrl(req);  }
  let parsed = req._parsedOriginalUrl;
  if (fresh(url, parsed)) {    // Return cached URL parse    return parsed;  }
  // Parse the URL  parsed = fastParse(url);  parsed._raw = url;
  return (req._parsedOriginalUrl = parsed);}
/** * Parse the `str` url with fast-path short-cut. * * @param {string} str * @return {ParsedURL} * @private */function fastParse(str: string): ParsedURL {  if (typeof str !== "string" || str.charCodeAt(0) !== 0x2f /* / */) {    try {      return new URL(str);    } catch (_) {      // Gracefully fallback to pattern matching.    }  }
  let pathname = str;  let query = null;  let search = null;
  // This takes the regexp from https://github.com/joyent/node/pull/7878  // Which is /^(\/[^?#\s]*)(\?[^#\s]*)?$/  // And unrolls it into a for loop  for (let i = 1; i < str.length; i++) {    switch (str.charCodeAt(i)) {      case 0x3f:/* ?  */        if (search === null) {          pathname = str.substring(0, i);          query = str.substring(i + 1);          search = str.substring(i);        }        break;      case 0x09:/* \t */      case 0x0a:/* \n */      case 0x0c:/* \f */      case 0x0d:/* \r */      case 0x20:/*    */      case 0x23:/* #  */      case 0xa0:      case 0xfeff:        return new URL(str);    }  }
  const url = {} as ParsedURL;
  url.path = str || null;  (url as any).href = str || null;  (url as any).pathname = pathname || null;  (url as any).query = query || null;  (url as any).search = search || null;  (url as any).searchParams = new URLSearchParams(search || "");
  return url;}
/** * Determine if parsed is still fresh for url. * * @param {string} url * @param {ParsedURL} parsedUrl * @return {boolean} * @private */function fresh(url: string, parsedUrl: ParsedURL | undefined): boolean {  return typeof parsedUrl === "object" &&    parsedUrl !== null &&    parsedUrl._raw === url;}