mirror of
https://github.com/denoland/deno.git
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552 lines
14 KiB
JavaScript
552 lines
14 KiB
JavaScript
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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// @ts-check
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/// <reference path="../webidl/internal.d.ts" />
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/// <reference path="../web/internal.d.ts" />
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/// <reference path="../file/internal.d.ts" />
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/// <reference path="../file/lib.deno_file.d.ts" />
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/// <reference path="./internal.d.ts" />
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/// <reference path="./11_streams_types.d.ts" />
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/// <reference path="./lib.deno_fetch.d.ts" />
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/// <reference lib="esnext" />
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"use strict";
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((window) => {
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const webidl = globalThis.__bootstrap.webidl;
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const { Blob, File, _byteSequence } = globalThis.__bootstrap.file;
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const entryList = Symbol("entry list");
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/**
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* @param {string} name
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* @param {string | Blob} value
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* @param {string | undefined} filename
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* @returns {FormDataEntry}
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*/
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function createEntry(name, value, filename) {
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if (value instanceof Blob && !(value instanceof File)) {
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value = new File([value[_byteSequence]], "blob", { type: value.type });
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}
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if (value instanceof File && filename !== undefined) {
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value = new File([value[_byteSequence]], filename, {
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type: value.type,
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lastModified: value.lastModified,
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});
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}
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return {
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name,
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// @ts-expect-error because TS is not smart enough
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value,
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};
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}
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/**
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* @typedef FormDataEntry
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* @property {string} name
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* @property {FormDataEntryValue} value
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*/
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class FormData {
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get [Symbol.toStringTag]() {
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return "FormData";
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}
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/** @type {FormDataEntry[]} */
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[entryList] = [];
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/** @param {void} form */
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constructor(form) {
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if (form !== undefined) {
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webidl.illegalConstructor();
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}
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this[webidl.brand] = webidl.brand;
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}
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/**
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* @param {string} name
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* @param {string | Blob} valueOrBlobValue
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* @param {string} [filename]
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* @returns {void}
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*/
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append(name, valueOrBlobValue, filename) {
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webidl.assertBranded(this, FormData);
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const prefix = "Failed to execute 'append' on 'FormData'";
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webidl.requiredArguments(arguments.length, 2, { prefix });
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name = webidl.converters["USVString"](name, {
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prefix,
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context: "Argument 1",
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});
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if (valueOrBlobValue instanceof Blob) {
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valueOrBlobValue = webidl.converters["Blob"](valueOrBlobValue, {
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prefix,
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context: "Argument 2",
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});
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if (filename !== undefined) {
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filename = webidl.converters["USVString"](filename, {
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prefix,
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context: "Argument 3",
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});
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}
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} else {
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valueOrBlobValue = webidl.converters["USVString"](valueOrBlobValue, {
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prefix,
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context: "Argument 2",
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});
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}
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const entry = createEntry(name, valueOrBlobValue, filename);
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this[entryList].push(entry);
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}
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/**
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* @param {string} name
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* @returns {void}
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*/
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delete(name) {
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webidl.assertBranded(this, FormData);
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const prefix = "Failed to execute 'name' on 'FormData'";
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webidl.requiredArguments(arguments.length, 1, { prefix });
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name = webidl.converters["USVString"](name, {
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prefix,
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context: "Argument 1",
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});
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const list = this[entryList];
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for (let i = 0; i < list.length; i++) {
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if (list[i].name === name) {
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list.splice(i, 1);
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i--;
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}
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}
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}
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/**
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* @param {string} name
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* @returns {FormDataEntryValue | null}
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*/
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get(name) {
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webidl.assertBranded(this, FormData);
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const prefix = "Failed to execute 'get' on 'FormData'";
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webidl.requiredArguments(arguments.length, 1, { prefix });
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name = webidl.converters["USVString"](name, {
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prefix,
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context: "Argument 1",
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});
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for (const entry of this[entryList]) {
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if (entry.name === name) return entry.value;
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}
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return null;
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}
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/**
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* @param {string} name
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* @returns {FormDataEntryValue[]}
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*/
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getAll(name) {
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webidl.assertBranded(this, FormData);
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const prefix = "Failed to execute 'getAll' on 'FormData'";
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webidl.requiredArguments(arguments.length, 1, { prefix });
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name = webidl.converters["USVString"](name, {
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prefix,
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context: "Argument 1",
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});
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const returnList = [];
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for (const entry of this[entryList]) {
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if (entry.name === name) returnList.push(entry.value);
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}
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return returnList;
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}
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/**
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* @param {string} name
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* @returns {boolean}
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*/
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has(name) {
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webidl.assertBranded(this, FormData);
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const prefix = "Failed to execute 'has' on 'FormData'";
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webidl.requiredArguments(arguments.length, 1, { prefix });
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name = webidl.converters["USVString"](name, {
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prefix,
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context: "Argument 1",
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});
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for (const entry of this[entryList]) {
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if (entry.name === name) return true;
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}
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return false;
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}
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/**
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* @param {string} name
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* @param {string | Blob} valueOrBlobValue
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* @param {string} [filename]
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* @returns {void}
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*/
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set(name, valueOrBlobValue, filename) {
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webidl.assertBranded(this, FormData);
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const prefix = "Failed to execute 'set' on 'FormData'";
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webidl.requiredArguments(arguments.length, 2, { prefix });
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name = webidl.converters["USVString"](name, {
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prefix,
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context: "Argument 1",
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});
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if (valueOrBlobValue instanceof Blob) {
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valueOrBlobValue = webidl.converters["Blob"](valueOrBlobValue, {
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prefix,
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context: "Argument 2",
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});
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if (filename !== undefined) {
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filename = webidl.converters["USVString"](filename, {
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prefix,
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context: "Argument 3",
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});
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}
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} else {
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valueOrBlobValue = webidl.converters["USVString"](valueOrBlobValue, {
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prefix,
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context: "Argument 2",
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});
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}
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const entry = createEntry(name, valueOrBlobValue, filename);
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const list = this[entryList];
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let added = false;
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for (let i = 0; i < list.length; i++) {
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if (list[i].name === name) {
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if (!added) {
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list[i] = entry;
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added = true;
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} else {
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list.splice(i, 1);
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i--;
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}
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}
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}
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if (!added) {
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list.push(entry);
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}
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}
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}
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webidl.mixinPairIterable("FormData", FormData, entryList, "name", "value");
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const encoder = new TextEncoder();
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class MultipartBuilder {
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/**
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* @param {FormData} formData
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*/
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constructor(formData) {
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this.entryList = formData[entryList];
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this.boundary = this.#createBoundary();
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/** @type {Uint8Array[]} */
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this.chunks = [];
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}
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/**
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* @returns {string}
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*/
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getContentType() {
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return `multipart/form-data; boundary=${this.boundary}`;
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}
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/**
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* @returns {Uint8Array}
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*/
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getBody() {
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for (const { name, value } of this.entryList) {
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if (value instanceof File) {
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this.#writeFile(name, value);
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} else this.#writeField(name, value);
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}
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this.chunks.push(encoder.encode(`\r\n--${this.boundary}--`));
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let totalLength = 0;
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for (const chunk of this.chunks) {
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totalLength += chunk.byteLength;
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}
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const finalBuffer = new Uint8Array(totalLength);
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let i = 0;
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for (const chunk of this.chunks) {
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finalBuffer.set(chunk, i);
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i += chunk.byteLength;
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}
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return finalBuffer;
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}
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#createBoundary = () => {
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return (
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"----------" +
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Array.from(Array(32))
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.map(() => Math.random().toString(36)[2] || 0)
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.join("")
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);
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};
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/**
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* @param {[string, string][]} headers
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* @returns {void}
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*/
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#writeHeaders = (headers) => {
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let buf = (this.chunks.length === 0) ? "" : "\r\n";
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buf += `--${this.boundary}\r\n`;
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for (const [key, value] of headers) {
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buf += `${key}: ${value}\r\n`;
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}
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buf += `\r\n`;
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this.chunks.push(encoder.encode(buf));
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};
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/**
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* @param {string} field
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* @param {string} filename
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* @param {string} [type]
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* @returns {void}
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*/
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#writeFileHeaders = (
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field,
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filename,
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type,
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) => {
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/** @type {[string, string][]} */
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const headers = [
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[
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"Content-Disposition",
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`form-data; name="${field}"; filename="${filename}"`,
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],
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["Content-Type", type || "application/octet-stream"],
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];
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return this.#writeHeaders(headers);
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};
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/**
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* @param {string} field
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* @returns {void}
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*/
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#writeFieldHeaders = (field) => {
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/** @type {[string, string][]} */
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const headers = [["Content-Disposition", `form-data; name="${field}"`]];
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return this.#writeHeaders(headers);
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};
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/**
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* @param {string} field
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* @param {string} value
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* @returns {void}
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*/
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#writeField = (field, value) => {
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this.#writeFieldHeaders(field);
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this.chunks.push(encoder.encode(value));
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};
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/**
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* @param {string} field
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* @param {File} value
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* @returns {void}
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*/
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#writeFile = (field, value) => {
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this.#writeFileHeaders(field, value.name, value.type);
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this.chunks.push(value[_byteSequence]);
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};
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}
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/**
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* @param {FormData} formdata
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* @returns {{body: Uint8Array, contentType: string}}
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*/
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function encodeFormData(formdata) {
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const builder = new MultipartBuilder(formdata);
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return {
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body: builder.getBody(),
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contentType: builder.getContentType(),
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};
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}
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/**
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* @param {string} value
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* @returns {Map<string, string>}
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*/
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function parseContentDisposition(value) {
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/** @type {Map<string, string>} */
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const params = new Map();
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// Forced to do so for some Map constructor param mismatch
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value
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.split(";")
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.slice(1)
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.map((s) => s.trim().split("="))
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.filter((arr) => arr.length > 1)
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.map(([k, v]) => [k, v.replace(/^"([^"]*)"$/, "$1")])
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.forEach(([k, v]) => params.set(k, v));
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return params;
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}
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const LF = "\n".codePointAt(0);
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const CR = "\r".codePointAt(0);
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const decoder = new TextDecoder("utf-8");
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class MultipartParser {
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/**
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* @param {Uint8Array} body
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* @param {string | undefined} boundary
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*/
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constructor(body, boundary) {
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if (!boundary) {
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throw new TypeError("multipart/form-data must provide a boundary");
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}
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this.boundary = `--${boundary}`;
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this.body = body;
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this.boundaryChars = encoder.encode(this.boundary);
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}
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/**
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* @param {string} headersText
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* @returns {{ headers: Headers, disposition: Map<string, string> }}
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*/
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#parseHeaders = (headersText) => {
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const headers = new Headers();
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const rawHeaders = headersText.split("\r\n");
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for (const rawHeader of rawHeaders) {
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const sepIndex = rawHeader.indexOf(":");
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if (sepIndex < 0) {
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continue; // Skip this header
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}
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const key = rawHeader.slice(0, sepIndex);
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const value = rawHeader.slice(sepIndex + 1);
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headers.set(key, value);
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}
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const disposition = parseContentDisposition(
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headers.get("Content-Disposition") ?? "",
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);
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return { headers, disposition };
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};
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/**
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* @returns {FormData}
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*/
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parse() {
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// Body must be at least 2 boundaries + \r\n + -- on the last boundary.
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if (this.body.length < (this.boundary.length * 2) + 4) {
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throw new TypeError("Form data too short to be valid.");
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}
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const formData = new FormData();
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let headerText = "";
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let boundaryIndex = 0;
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let state = 0;
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let fileStart = 0;
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for (let i = 0; i < this.body.length; i++) {
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const byte = this.body[i];
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const prevByte = this.body[i - 1];
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const isNewLine = byte === LF && prevByte === CR;
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if (state === 1 || state === 2 || state == 3) {
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headerText += String.fromCharCode(byte);
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}
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if (state === 0 && isNewLine) {
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state = 1;
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} else if (state === 1 && isNewLine) {
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state = 2;
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const headersDone = this.body[i + 1] === CR &&
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this.body[i + 2] === LF;
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if (headersDone) {
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state = 3;
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}
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} else if (state === 2 && isNewLine) {
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state = 3;
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} else if (state === 3 && isNewLine) {
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state = 4;
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fileStart = i + 1;
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} else if (state === 4) {
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if (this.boundaryChars[boundaryIndex] !== byte) {
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boundaryIndex = 0;
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} else {
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boundaryIndex++;
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}
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if (boundaryIndex >= this.boundary.length) {
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const { headers, disposition } = this.#parseHeaders(headerText);
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const content = this.body.subarray(
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fileStart,
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i - boundaryIndex - 1,
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);
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// https://fetch.spec.whatwg.org/#ref-for-dom-body-formdata
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const filename = disposition.get("filename");
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const name = disposition.get("name");
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state = 5;
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// Reset
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boundaryIndex = 0;
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headerText = "";
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if (!name) {
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continue; // Skip, unknown name
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}
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if (filename) {
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const blob = new Blob([content], {
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type: headers.get("Content-Type") || "application/octet-stream",
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});
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formData.append(name, blob, filename);
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} else {
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formData.append(name, decoder.decode(content));
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}
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}
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} else if (state === 5 && isNewLine) {
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state = 1;
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}
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}
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return formData;
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}
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}
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/**
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* @param {Uint8Array} body
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* @param {string | undefined} boundary
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* @returns {FormData}
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*/
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function parseFormData(body, boundary) {
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const parser = new MultipartParser(body, boundary);
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return parser.parse();
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}
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/**
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* @param {FormDataEntry[]} entries
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* @returns {FormData}
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*/
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function formDataFromEntries(entries) {
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const fd = new FormData();
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fd[entryList] = entries;
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return fd;
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}
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webidl.converters["FormData"] = webidl
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.createInterfaceConverter("FormData", FormData);
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globalThis.__bootstrap.formData = {
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FormData,
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encodeFormData,
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parseFormData,
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formDataFromEntries,
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};
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})(globalThis);
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