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/*! * Port of body-parser (https://github.com/expressjs/body-parser) for Deno. * * Licensed as follows: * * (The MIT License) * * Copyright (c) 2014 Jonathan Ong <me@jongleberry.com> * Copyright (c) 2014-2015 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 { createError } from "../../utils/createError.ts";import { read } from "./read.ts";import { getCharset } from "./getCharset.ts";import type { NextFunction, OpineRequest, OpineResponse } from "../../types.ts";import { hasBody, qs } from "../../../deps.ts";import { typeChecker } from "./typeChecker.ts";
/** * Create a middleware to parse urlencoded bodies. * * @param {object} [options] * @return {function} * @public */export function urlencoded(options: any = {}) {  const extended = options.extended !== false;  const inflate = options.inflate !== false;  const type = options.type || "application/x-www-form-urlencoded";  const verify = options.verify || false;
  if (verify !== false && typeof verify !== "function") {    throw new TypeError("option verify must be function");  }
  const queryParse = extended ? extendedParser(options) : simpleParser(options);
  // create the appropriate type checking function  const shouldParse = typeof type !== "function" ? typeChecker(type) : type;
  function parse(body: string) {    return body.length ? queryParse(body) : {};  }
  return function urlencodedParser(    req: OpineRequest,    res: OpineResponse,    next: NextFunction,  ) {    if (req._parsedBody) {      next();
      return;    }
    // skip requests without bodies    if (      !hasBody(req.headers) ||      parseInt(req.headers.get("content-length") || "") === 0    ) {      req.parsedBody = Object.fromEntries(        new URLSearchParams().entries(),      );      next();
      return;    }
    // determine if request should be parsed    if (!shouldParse(req)) {      next();
      return;    }
    // assert charset    const charset = getCharset(req) || "utf-8";    if (charset !== "utf-8") {      next(        createError(          415,          'unsupported charset "' + charset.toUpperCase() + '"',        ),      );
      return;    }
    // read    read(req, res, next, parse, {      encoding: charset,      inflate: inflate,      verify: verify,    });  };}
/** * Get the simple query parser. * * @param {object} options * @private */function simpleParser(options: any) {  let parameterLimit = options.parameterLimit !== undefined    ? options.parameterLimit    : 1000;
  if (isNaN(parameterLimit) || parameterLimit < 1) {    throw new TypeError("option parameterLimit must be a positive number");  }
  if (isFinite(parameterLimit)) {    parameterLimit = parameterLimit | 0;  }
  return function queryParse(body: string) {    const decodedBody = decode(body);    const paramCount = parameterCount(decodedBody, parameterLimit);
    if (paramCount === undefined) {      throw createError(413, "too many parameters", {        type: "parameters.too.many",      });    }
    return Object.fromEntries(      new URLSearchParams(decodedBody)        .entries(),    );  };}
/** * Get the extended query parser. * * @param {object} options * @private */function extendedParser(options: any) {  let parameterLimit = options.parameterLimit !== undefined    ? options.parameterLimit    : 1000;
  if (isNaN(parameterLimit) || parameterLimit < 1) {    throw new TypeError("option parameterLimit must be a positive number");  }
  if (isFinite(parameterLimit)) {    parameterLimit = parameterLimit | 0;  }
  return function queryParse(body: string) {    const decodedBody = decode(body);    const paramCount = parameterCount(decodedBody, parameterLimit);
    if (paramCount === undefined) {      throw createError(413, "too many parameters", {        type: "parameters.too.many",      });    }
    const arrayLimit = Math.max(100, paramCount);
    return qs.parse(decodedBody, {      allowPrototypes: true,      arrayLimit,      depth: Infinity,      parameterLimit,    });  };}
/** * Count the number of parameters, stopping once limit reached * * @param {string} body * @param {number} limit * @private */function parameterCount(body: string, limit: number) {  let count = 0;  let index = 0;
  while ((index = body.indexOf("&", index)) !== -1) {    count++;    index++;
    if (count === limit) {      return undefined;    }  }
  return count;}
/** * URI decode a string * * @param {string} str * @returns {string} decoded string * @private */function decode(str: string): string {  return decodeURIComponent(str.replace(/\+/g, " "));}