mirror of
https://github.com/denoland/deno.git
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338 lines
11 KiB
JavaScript
338 lines
11 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="../url/internal.d.ts" />
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/// <reference path="../url/lib.deno_url.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 core = window.Deno.core;
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const webidl = globalThis.__bootstrap.webidl;
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const { parseUrlEncoded } = globalThis.__bootstrap.url;
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const { parseFormData, formDataFromEntries, encodeFormData } =
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globalThis.__bootstrap.formData;
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const mimesniff = globalThis.__bootstrap.mimesniff;
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const { isReadableStreamDisturbed } = globalThis.__bootstrap.streams;
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class InnerBody {
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/** @type {ReadableStream<Uint8Array> | { body: Uint8Array, consumed: boolean }} */
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streamOrStatic;
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/** @type {null | Uint8Array | Blob | FormData} */
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source = null;
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/** @type {null | number} */
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length = null;
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/**
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* @param {ReadableStream<Uint8Array> | { body: Uint8Array, consumed: boolean }} stream
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*/
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constructor(stream) {
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this.streamOrStatic = stream ??
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{ body: new Uint8Array(), consumed: false };
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}
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get stream() {
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if (!(this.streamOrStatic instanceof ReadableStream)) {
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const { body, consumed } = this.streamOrStatic;
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this.streamOrStatic = new ReadableStream({
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start(controller) {
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controller.enqueue(body);
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controller.close();
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},
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});
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if (consumed) {
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this.streamOrStatic.cancel();
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}
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}
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return this.streamOrStatic;
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}
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/**
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* https://fetch.spec.whatwg.org/#body-unusable
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* @returns {boolean}
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*/
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unusable() {
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if (this.streamOrStatic instanceof ReadableStream) {
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return this.streamOrStatic.locked ||
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isReadableStreamDisturbed(this.streamOrStatic);
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}
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return this.streamOrStatic.consumed;
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}
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/**
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* @returns {boolean}
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*/
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consumed() {
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if (this.streamOrStatic instanceof ReadableStream) {
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return isReadableStreamDisturbed(this.streamOrStatic);
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}
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return this.streamOrStatic.consumed;
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}
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/**
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* https://fetch.spec.whatwg.org/#concept-body-consume-body
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* @returns {Promise<Uint8Array>}
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*/
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async consume() {
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if (this.unusable()) throw new TypeError("Body already consumed.");
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if (this.streamOrStatic instanceof ReadableStream) {
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const reader = this.stream.getReader();
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/** @type {Uint8Array[]} */
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const chunks = [];
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let totalLength = 0;
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while (true) {
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const { value: chunk, done } = await reader.read();
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if (done) break;
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chunks.push(chunk);
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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 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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} else {
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this.streamOrStatic.consumed = true;
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return this.streamOrStatic.body;
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}
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}
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/**
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* @returns {InnerBody}
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*/
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clone() {
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const [out1, out2] = this.stream.tee();
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this.streamOrStatic = out1;
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const second = new InnerBody(out2);
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second.source = core.deserialize(core.serialize(this.source));
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second.length = this.length;
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return second;
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}
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}
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/**
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* @param {any} prototype
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* @param {symbol} bodySymbol
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* @param {symbol} mimeTypeSymbol
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* @returns {void}
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*/
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function mixinBody(prototype, bodySymbol, mimeTypeSymbol) {
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function consumeBody(object) {
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if (object[bodySymbol] !== null) {
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return object[bodySymbol].consume();
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}
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return Promise.resolve(new Uint8Array());
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}
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/** @type {PropertyDescriptorMap} */
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const mixin = {
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body: {
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/**
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* @returns {ReadableStream<Uint8Array> | null}
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*/
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get() {
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webidl.assertBranded(this, prototype);
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if (this[bodySymbol] === null) {
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return null;
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} else {
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return this[bodySymbol].stream;
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}
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},
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},
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bodyUsed: {
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/**
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* @returns {boolean}
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*/
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get() {
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webidl.assertBranded(this, prototype);
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if (this[bodySymbol] !== null) {
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return this[bodySymbol].consumed();
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}
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return false;
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},
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},
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arrayBuffer: {
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/** @returns {Promise<ArrayBuffer>} */
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value: async function arrayBuffer() {
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webidl.assertBranded(this, prototype);
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const body = await consumeBody(this);
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return packageData(body, "ArrayBuffer");
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},
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},
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blob: {
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/** @returns {Promise<Blob>} */
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value: async function blob() {
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webidl.assertBranded(this, prototype);
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const body = await consumeBody(this);
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return packageData(body, "Blob", this[mimeTypeSymbol]);
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},
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},
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formData: {
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/** @returns {Promise<FormData>} */
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value: async function formData() {
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webidl.assertBranded(this, prototype);
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const body = await consumeBody(this);
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return packageData(body, "FormData", this[mimeTypeSymbol]);
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},
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},
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json: {
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/** @returns {Promise<any>} */
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value: async function json() {
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webidl.assertBranded(this, prototype);
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const body = await consumeBody(this);
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return packageData(body, "JSON");
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},
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},
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text: {
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/** @returns {Promise<string>} */
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value: async function text() {
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webidl.assertBranded(this, prototype);
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const body = await consumeBody(this);
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return packageData(body, "text");
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},
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},
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};
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return Object.defineProperties(prototype.prototype, mixin);
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}
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const decoder = new TextDecoder();
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/**
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* https://fetch.spec.whatwg.org/#concept-body-package-data
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* @param {Uint8Array} bytes
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* @param {"ArrayBuffer" | "Blob" | "FormData" | "JSON" | "text"} type
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* @param {MimeType | null} [mimeType]
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*/
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function packageData(bytes, type, mimeType) {
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switch (type) {
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case "ArrayBuffer":
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return bytes.buffer;
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case "Blob":
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return new Blob([bytes], {
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type: mimeType !== null ? mimesniff.serializeMimeType(mimeType) : "",
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});
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case "FormData": {
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if (mimeType !== null) {
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if (mimeType !== null) {
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const essence = mimesniff.essence(mimeType);
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if (essence === "multipart/form-data") {
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const boundary = mimeType.parameters.get("boundary");
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if (boundary === null) {
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throw new TypeError(
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"Missing boundary parameter in mime type of multipart formdata.",
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);
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}
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return parseFormData(bytes, boundary);
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} else if (essence === "application/x-www-form-urlencoded") {
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const entries = parseUrlEncoded(bytes);
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return formDataFromEntries(
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entries.map((x) => ({ name: x[0], value: x[1] })),
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);
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}
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}
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throw new TypeError("Invalid form data");
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}
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throw new TypeError("Missing content type");
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}
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case "JSON":
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return JSON.parse(decoder.decode(bytes));
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case "text":
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return decoder.decode(bytes);
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}
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}
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const encoder = new TextEncoder();
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/**
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* @param {BodyInit} object
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* @returns {{body: InnerBody, contentType: string | null}}
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*/
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function extractBody(object) {
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/** @type {ReadableStream<Uint8Array> | { body: Uint8Array, consumed: boolean }} */
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let stream;
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let source = null;
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let length = null;
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let contentType = null;
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if (object instanceof Blob) {
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stream = object.stream();
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source = object;
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length = object.size;
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if (object.type.length !== 0) {
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contentType = object.type;
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}
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} else if (ArrayBuffer.isView(object) || object instanceof ArrayBuffer) {
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const u8 = ArrayBuffer.isView(object)
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? new Uint8Array(
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object.buffer,
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object.byteOffset,
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object.byteLength,
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)
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: new Uint8Array(object);
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const copy = u8.slice(0, u8.byteLength);
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source = copy;
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} else if (object instanceof FormData) {
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const res = encodeFormData(object);
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stream = { body: res.body, consumed: false };
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source = object;
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length = res.body.byteLength;
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contentType = res.contentType;
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} else if (object instanceof URLSearchParams) {
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source = encoder.encode(object.toString());
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contentType = "application/x-www-form-urlencoded;charset=UTF-8";
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} else if (typeof object === "string") {
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source = encoder.encode(object);
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contentType = "text/plain;charset=UTF-8";
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} else if (object instanceof ReadableStream) {
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stream = object;
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if (object.locked || isReadableStreamDisturbed(object)) {
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throw new TypeError("ReadableStream is locked or disturbed");
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}
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}
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if (source instanceof Uint8Array) {
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stream = { body: source, consumed: false };
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length = source.byteLength;
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}
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const body = new InnerBody(stream);
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body.source = source;
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body.length = length;
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return { body, contentType };
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}
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webidl.converters["BodyInit"] = (V, opts) => {
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// Union for (ReadableStream or Blob or ArrayBufferView or ArrayBuffer or FormData or URLSearchParams or USVString)
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if (V instanceof ReadableStream) {
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// TODO(lucacasonato): ReadableStream is not branded
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return V;
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} else if (V instanceof Blob) {
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return webidl.converters["Blob"](V, opts);
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} else if (V instanceof FormData) {
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return webidl.converters["FormData"](V, opts);
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} else if (V instanceof URLSearchParams) {
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// TODO(lucacasonato): URLSearchParams is not branded
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return V;
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}
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if (typeof V === "object") {
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if (V instanceof ArrayBuffer || V instanceof SharedArrayBuffer) {
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return webidl.converters["ArrayBuffer"](V, opts);
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}
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if (ArrayBuffer.isView(V)) {
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return webidl.converters["ArrayBufferView"](V, opts);
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}
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}
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return webidl.converters["USVString"](V, opts);
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};
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webidl.converters["BodyInit?"] = webidl.createNullableConverter(
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webidl.converters["BodyInit"],
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);
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window.__bootstrap.fetchBody = { mixinBody, InnerBody, extractBody };
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})(globalThis);
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