mirror of
https://github.com/denoland/deno
synced 2024-08-25 02:57:22 +00:00
539 lines
14 KiB
JavaScript
539 lines
14 KiB
JavaScript
// Copyright 2018-2024 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="../web/lib.deno_web.d.ts" />
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/// <reference path="./internal.d.ts" />
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/// <reference path="../web/06_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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import { primordials } from "ext:core/mod.js";
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const {
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ArrayIsArray,
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ArrayPrototypePush,
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ArrayPrototypeSort,
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ArrayPrototypeJoin,
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ArrayPrototypeSplice,
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ObjectFromEntries,
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ObjectHasOwn,
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ObjectPrototypeIsPrototypeOf,
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RegExpPrototypeTest,
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Symbol,
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SymbolFor,
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SymbolIterator,
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StringPrototypeReplaceAll,
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StringPrototypeCharCodeAt,
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TypeError,
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} = primordials;
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import * as webidl from "ext:deno_webidl/00_webidl.js";
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import {
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byteLowerCase,
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collectHttpQuotedString,
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collectSequenceOfCodepoints,
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HTTP_TAB_OR_SPACE_PREFIX_RE,
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HTTP_TAB_OR_SPACE_SUFFIX_RE,
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HTTP_TOKEN_CODE_POINT_RE,
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httpTrim,
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} from "ext:deno_web/00_infra.js";
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const _headerList = Symbol("header list");
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const _iterableHeaders = Symbol("iterable headers");
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const _iterableHeadersCache = Symbol("iterable headers cache");
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const _guard = Symbol("guard");
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const _brand = webidl.brand;
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/**
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* @typedef Header
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* @type {[string, string]}
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*/
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/**
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* @typedef HeaderList
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* @type {Header[]}
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*/
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/**
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* @param {string} potentialValue
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* @returns {string}
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*/
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function normalizeHeaderValue(potentialValue) {
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return httpTrim(potentialValue);
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}
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/**
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* @param {Headers} headers
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* @param {HeadersInit} object
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*/
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function fillHeaders(headers, object) {
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if (ArrayIsArray(object)) {
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for (let i = 0; i < object.length; ++i) {
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const header = object[i];
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if (header.length !== 2) {
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throw new TypeError(
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`Invalid header. Length must be 2, but is ${header.length}`,
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);
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}
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appendHeader(headers, header[0], header[1]);
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}
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} else {
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for (const key in object) {
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if (!ObjectHasOwn(object, key)) {
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continue;
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}
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appendHeader(headers, key, object[key]);
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}
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}
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}
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function checkForInvalidValueChars(value) {
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for (let i = 0; i < value.length; i++) {
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const c = StringPrototypeCharCodeAt(value, i);
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if (c === 0x0a || c === 0x0d || c === 0x00) {
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return false;
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}
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}
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return true;
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}
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let HEADER_NAME_CACHE = {};
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let HEADER_CACHE_SIZE = 0;
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const HEADER_NAME_CACHE_SIZE_BOUNDARY = 4096;
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function checkHeaderNameForHttpTokenCodePoint(name) {
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const fromCache = HEADER_NAME_CACHE[name];
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if (fromCache !== undefined) {
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return fromCache;
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}
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const valid = RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, name);
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if (HEADER_CACHE_SIZE > HEADER_NAME_CACHE_SIZE_BOUNDARY) {
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HEADER_NAME_CACHE = {};
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HEADER_CACHE_SIZE = 0;
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}
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HEADER_CACHE_SIZE++;
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HEADER_NAME_CACHE[name] = valid;
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return valid;
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}
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/**
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* https://fetch.spec.whatwg.org/#concept-headers-append
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* @param {Headers} headers
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* @param {string} name
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* @param {string} value
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*/
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function appendHeader(headers, name, value) {
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// 1.
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value = normalizeHeaderValue(value);
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// 2.
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if (!checkHeaderNameForHttpTokenCodePoint(name)) {
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throw new TypeError("Header name is not valid.");
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}
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if (!checkForInvalidValueChars(value)) {
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throw new TypeError("Header value is not valid.");
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}
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// 3.
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if (headers[_guard] == "immutable") {
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throw new TypeError("Headers are immutable.");
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}
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// 7.
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const list = headers[_headerList];
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const lowercaseName = byteLowerCase(name);
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for (let i = 0; i < list.length; i++) {
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if (byteLowerCase(list[i][0]) === lowercaseName) {
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name = list[i][0];
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break;
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}
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}
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ArrayPrototypePush(list, [name, value]);
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}
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/**
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* https://fetch.spec.whatwg.org/#concept-header-list-get
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* @param {HeaderList} list
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* @param {string} name
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*/
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function getHeader(list, name) {
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const lowercaseName = byteLowerCase(name);
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const entries = [];
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for (let i = 0; i < list.length; i++) {
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if (byteLowerCase(list[i][0]) === lowercaseName) {
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ArrayPrototypePush(entries, list[i][1]);
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}
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}
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if (entries.length === 0) {
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return null;
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} else {
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return ArrayPrototypeJoin(entries, "\x2C\x20");
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}
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}
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/**
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* https://fetch.spec.whatwg.org/#concept-header-list-get-decode-split
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* @param {HeaderList} list
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* @param {string} name
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* @returns {string[] | null}
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*/
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function getDecodeSplitHeader(list, name) {
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const initialValue = getHeader(list, name);
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if (initialValue === null) return null;
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const input = initialValue;
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let position = 0;
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const values = [];
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let value = "";
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while (position < initialValue.length) {
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// 7.1. collect up to " or ,
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const res = collectSequenceOfCodepoints(
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initialValue,
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position,
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(c) => c !== "\u0022" && c !== "\u002C",
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);
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value += res.result;
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position = res.position;
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if (position < initialValue.length) {
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if (input[position] === "\u0022") {
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const res = collectHttpQuotedString(input, position, false);
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value += res.result;
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position = res.position;
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if (position < initialValue.length) {
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continue;
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}
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} else {
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if (input[position] !== "\u002C") throw new TypeError("Unreachable");
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position += 1;
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}
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}
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value = StringPrototypeReplaceAll(value, HTTP_TAB_OR_SPACE_PREFIX_RE, "");
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value = StringPrototypeReplaceAll(value, HTTP_TAB_OR_SPACE_SUFFIX_RE, "");
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ArrayPrototypePush(values, value);
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value = "";
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}
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return values;
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}
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class Headers {
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/** @type {HeaderList} */
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[_headerList] = [];
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/** @type {"immutable" | "request" | "request-no-cors" | "response" | "none"} */
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[_guard];
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get [_iterableHeaders]() {
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const list = this[_headerList];
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if (
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this[_guard] === "immutable" &&
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this[_iterableHeadersCache] !== undefined
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) {
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return this[_iterableHeadersCache];
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}
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// The order of steps are not similar to the ones suggested by the
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// spec but produce the same result.
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const seenHeaders = {};
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const entries = [];
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for (let i = 0; i < list.length; ++i) {
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const entry = list[i];
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const name = byteLowerCase(entry[0]);
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const value = entry[1];
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if (value === null) throw new TypeError("Unreachable");
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// The following if statement is not spec compliant.
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// `set-cookie` is the only header that can not be concatenated,
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// so must be given to the user as multiple headers.
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// The else block of the if statement is spec compliant again.
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if (name === "set-cookie") {
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ArrayPrototypePush(entries, [name, value]);
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} else {
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// The following code has the same behaviour as getHeader()
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// at the end of loop. But it avoids looping through the entire
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// list to combine multiple values with same header name. It
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// instead gradually combines them as they are found.
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const seenHeaderIndex = seenHeaders[name];
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if (seenHeaderIndex !== undefined) {
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const entryValue = entries[seenHeaderIndex][1];
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entries[seenHeaderIndex][1] = entryValue.length > 0
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? entryValue + "\x2C\x20" + value
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: value;
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} else {
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seenHeaders[name] = entries.length; // store header index in entries array
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ArrayPrototypePush(entries, [name, value]);
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}
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}
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}
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ArrayPrototypeSort(
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entries,
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(a, b) => {
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const akey = a[0];
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const bkey = b[0];
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if (akey > bkey) return 1;
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if (akey < bkey) return -1;
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return 0;
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},
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);
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this[_iterableHeadersCache] = entries;
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return entries;
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}
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/** @param {HeadersInit} [init] */
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constructor(init = undefined) {
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if (init === _brand) {
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this[_brand] = _brand;
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return;
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}
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const prefix = "Failed to construct 'Headers'";
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if (init !== undefined) {
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init = webidl.converters["HeadersInit"](init, prefix, "Argument 1");
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}
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this[_brand] = _brand;
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this[_guard] = "none";
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if (init !== undefined) {
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fillHeaders(this, init);
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}
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}
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/**
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* @param {string} name
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* @param {string} value
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*/
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append(name, value) {
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webidl.assertBranded(this, HeadersPrototype);
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const prefix = "Failed to execute 'append' on 'Headers'";
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webidl.requiredArguments(arguments.length, 2, prefix);
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name = webidl.converters["ByteString"](name, prefix, "Argument 1");
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value = webidl.converters["ByteString"](value, prefix, "Argument 2");
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appendHeader(this, name, value);
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}
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/**
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* @param {string} name
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*/
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delete(name) {
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webidl.assertBranded(this, HeadersPrototype);
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const prefix = "Failed to execute 'delete' on 'Headers'";
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webidl.requiredArguments(arguments.length, 1, prefix);
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name = webidl.converters["ByteString"](name, prefix, "Argument 1");
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if (!checkHeaderNameForHttpTokenCodePoint(name)) {
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throw new TypeError("Header name is not valid.");
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}
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if (this[_guard] == "immutable") {
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throw new TypeError("Headers are immutable.");
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}
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const list = this[_headerList];
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const lowercaseName = byteLowerCase(name);
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for (let i = 0; i < list.length; i++) {
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if (byteLowerCase(list[i][0]) === lowercaseName) {
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ArrayPrototypeSplice(list, 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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*/
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get(name) {
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webidl.assertBranded(this, HeadersPrototype);
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const prefix = "Failed to execute 'get' on 'Headers'";
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webidl.requiredArguments(arguments.length, 1, prefix);
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name = webidl.converters["ByteString"](name, prefix, "Argument 1");
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if (!checkHeaderNameForHttpTokenCodePoint(name)) {
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throw new TypeError("Header name is not valid.");
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}
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const list = this[_headerList];
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return getHeader(list, name);
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}
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getSetCookie() {
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webidl.assertBranded(this, HeadersPrototype);
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const list = this[_headerList];
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const entries = [];
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for (let i = 0; i < list.length; i++) {
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if (byteLowerCase(list[i][0]) === "set-cookie") {
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ArrayPrototypePush(entries, list[i][1]);
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}
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}
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return entries;
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}
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/**
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* @param {string} name
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*/
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has(name) {
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webidl.assertBranded(this, HeadersPrototype);
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const prefix = "Failed to execute 'has' on 'Headers'";
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webidl.requiredArguments(arguments.length, 1, prefix);
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name = webidl.converters["ByteString"](name, prefix, "Argument 1");
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if (!checkHeaderNameForHttpTokenCodePoint(name)) {
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throw new TypeError("Header name is not valid.");
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}
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const list = this[_headerList];
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const lowercaseName = byteLowerCase(name);
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for (let i = 0; i < list.length; i++) {
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if (byteLowerCase(list[i][0]) === lowercaseName) {
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return true;
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}
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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} value
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*/
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set(name, value) {
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webidl.assertBranded(this, HeadersPrototype);
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const prefix = "Failed to execute 'set' on 'Headers'";
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webidl.requiredArguments(arguments.length, 2, prefix);
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name = webidl.converters["ByteString"](name, prefix, "Argument 1");
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value = webidl.converters["ByteString"](value, prefix, "Argument 2");
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value = normalizeHeaderValue(value);
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// 2.
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if (!checkHeaderNameForHttpTokenCodePoint(name)) {
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throw new TypeError("Header name is not valid.");
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}
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if (!checkForInvalidValueChars(value)) {
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throw new TypeError("Header value is not valid.");
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}
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if (this[_guard] == "immutable") {
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throw new TypeError("Headers are immutable.");
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}
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const list = this[_headerList];
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const lowercaseName = byteLowerCase(name);
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let added = false;
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for (let i = 0; i < list.length; i++) {
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if (byteLowerCase(list[i][0]) === lowercaseName) {
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if (!added) {
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list[i][1] = value;
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added = true;
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} else {
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ArrayPrototypeSplice(list, 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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ArrayPrototypePush(list, [name, value]);
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}
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}
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[SymbolFor("Deno.privateCustomInspect")](inspect, inspectOptions) {
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if (ObjectPrototypeIsPrototypeOf(HeadersPrototype, this)) {
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return `${this.constructor.name} ${
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inspect(ObjectFromEntries(this), inspectOptions)
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}`;
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} else {
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return `${this.constructor.name} ${inspect({}, inspectOptions)}`;
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}
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}
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}
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webidl.mixinPairIterable("Headers", Headers, _iterableHeaders, 0, 1);
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webidl.configureInterface(Headers);
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const HeadersPrototype = Headers.prototype;
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webidl.converters["HeadersInit"] = (V, prefix, context, opts) => {
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// Union for (sequence<sequence<ByteString>> or record<ByteString, ByteString>)
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if (webidl.type(V) === "Object" && V !== null) {
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if (V[SymbolIterator] !== undefined) {
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return webidl.converters["sequence<sequence<ByteString>>"](
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V,
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prefix,
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context,
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opts,
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);
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}
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return webidl.converters["record<ByteString, ByteString>"](
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V,
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prefix,
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context,
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opts,
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);
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}
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throw webidl.makeException(
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TypeError,
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"The provided value is not of type '(sequence<sequence<ByteString>> or record<ByteString, ByteString>)'",
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prefix,
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context,
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);
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};
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webidl.converters["Headers"] = webidl.createInterfaceConverter(
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"Headers",
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Headers.prototype,
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);
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/**
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* @param {HeaderList} list
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* @param {"immutable" | "request" | "request-no-cors" | "response" | "none"} guard
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* @returns {Headers}
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*/
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function headersFromHeaderList(list, guard) {
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const headers = new Headers(_brand);
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headers[_headerList] = list;
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headers[_guard] = guard;
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return headers;
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}
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/**
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* @param {Headers} headers
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* @returns {HeaderList}
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*/
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function headerListFromHeaders(headers) {
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return headers[_headerList];
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}
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/**
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* @param {Headers} headers
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* @returns {"immutable" | "request" | "request-no-cors" | "response" | "none"}
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*/
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function guardFromHeaders(headers) {
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return headers[_guard];
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}
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/**
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* @param {Headers} headers
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* @returns {[string, string][]}
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*/
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function headersEntries(headers) {
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return headers[_iterableHeaders];
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}
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export {
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fillHeaders,
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getDecodeSplitHeader,
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getHeader,
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guardFromHeaders,
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headerListFromHeaders,
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Headers,
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headersEntries,
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headersFromHeaderList,
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};
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