123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475
// Copyright 2019-2020 Yusuke Sakurai. All rights reserved. MIT license.import {  MultipartReader,  MultipartFormData,} from "./vendor/https/deno.land/std/mime/multipart.ts";import Reader = Deno.Reader;
/** * Parse multipart/form-data request * @param req ServerRequest * @param maxMemory maximum memory size for file part. *  Small file will be stored in memory, Big file in tempfile */export async function parserMultipartRequest(  req: { headers: Headers; body?: Reader },  maxMemory: number = 1 << 10, // 10MB by default): Promise<MultipartFormData> {  // Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryO5quBRiT4G7Vm3R7  const contentType = req.headers.get("content-type");  if (!req.body) {    throw new Error("request has no body");  }  if (!contentType || !contentType.match("multipart/form-data")) {    throw new Error("is not multipart request");  }  let m = contentType.match(/boundary=([^ ]+?)$/);  if (!m) {    throw new Error("doesn't have boundary");  }  const boundary = m[1];  const reader = new MultipartReader(req.body, boundary);  return reader.readForm(maxMemory);}/** * Parse application/x-www-form-urlencoded request * @param req part of ServerRequest */export async function parseUrlEncodedForm(req: {  headers: Headers;  body?: Reader;}): Promise<MultipartFormData> {  const contentType = req.headers.get("content-type");  if (!req.body) {    throw new Error("request has no body");  }  if (    !contentType ||    !contentType.match(/^application\/x-www-form-urlencoded/)  ) {    throw new Error("is not form urlencoded request");  }  const buf = new Deno.Buffer();  await Deno.copy(buf, req.body);  const params = new URLSearchParams(decodeURIComponent(buf.toString()));  function* entries() {    for (const i of params.entries()) {      yield i;    }  }  return {    value(f: string) {      return params.get(f) ?? undefined;    },    entries,    [Symbol.iterator]() {      return entries();    },    file(f: string) {      return undefined;    },    async removeAll() {    },  };}