mirror of
https://github.com/denoland/deno.git
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479 lines
13 KiB
JavaScript
479 lines
13 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="../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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"use strict";
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((window) => {
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const webidl = window.__bootstrap.webidl;
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const {
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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_WHITESPACE_PREFIX_RE,
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HTTP_WHITESPACE_SUFFIX_RE,
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HTTP_TOKEN_CODE_POINT_RE,
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byteLowerCase,
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collectSequenceOfCodepoints,
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collectHttpQuotedString,
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} = window.__bootstrap.infra;
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const {
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ArrayIsArray,
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ArrayPrototypeMap,
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ArrayPrototypePush,
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ArrayPrototypeSort,
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ArrayPrototypeJoin,
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ArrayPrototypeSplice,
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ArrayPrototypeFilter,
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ObjectKeys,
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ObjectEntries,
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RegExpPrototypeTest,
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Symbol,
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SymbolFor,
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SymbolIterator,
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SymbolToStringTag,
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StringPrototypeReplaceAll,
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StringPrototypeIncludes,
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TypeError,
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} = window.__bootstrap.primordials;
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const _headerList = Symbol("header list");
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const _iterableHeaders = Symbol("iterable headers");
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const _guard = Symbol("guard");
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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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potentialValue = StringPrototypeReplaceAll(
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potentialValue,
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HTTP_WHITESPACE_PREFIX_RE,
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"",
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);
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potentialValue = StringPrototypeReplaceAll(
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potentialValue,
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HTTP_WHITESPACE_SUFFIX_RE,
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"",
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);
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return 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 (const header of object) {
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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 of ObjectKeys(object)) {
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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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/**
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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 (!RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, name)) {
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throw new TypeError("Header name is not valid.");
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}
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if (
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StringPrototypeIncludes(value, "\x00") ||
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StringPrototypeIncludes(value, "\x0A") ||
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StringPrototypeIncludes(value, "\x0D")
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) {
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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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name = byteLowerCase(name);
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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 = ArrayPrototypeMap(
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ArrayPrototypeFilter(list, (entry) => entry[0] === lowercaseName),
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(entry) => entry[1],
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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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// 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 headers = {};
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const cookies = [];
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for (const entry of list) {
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const name = 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 concatentated,
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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(cookies, [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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let header = headers[name];
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if (header && header.length > 0) {
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header += "\x2C\x20" + value;
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} else {
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header = value;
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}
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headers[name] = header;
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}
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}
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return ArrayPrototypeSort(
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[...ObjectEntries(headers), ...cookies],
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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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}
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/** @param {HeadersInit} [init] */
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constructor(init = undefined) {
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const prefix = "Failed to construct 'Event'";
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if (init !== undefined) {
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init = webidl.converters["HeadersInit"](init, {
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prefix,
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context: "Argument 1",
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});
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}
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this[webidl.brand] = webidl.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, Headers);
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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, {
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prefix,
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context: "Argument 1",
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});
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value = webidl.converters["ByteString"](value, {
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prefix,
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context: "Argument 2",
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});
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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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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, {
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prefix,
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context: "Argument 1",
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});
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if (!RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, 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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name = byteLowerCase(name);
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for (let i = 0; i < list.length; i++) {
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if (list[i][0] === name) {
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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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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, {
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prefix,
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context: "Argument 1",
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});
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if (!RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, 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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/**
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* @param {string} name
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*/
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has(name) {
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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, {
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prefix,
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context: "Argument 1",
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});
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if (!RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, 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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name = byteLowerCase(name);
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for (let i = 0; i < list.length; i++) {
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if (list[i][0] === name) {
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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, Headers);
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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, {
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prefix,
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context: "Argument 1",
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});
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value = webidl.converters["ByteString"](value, {
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prefix,
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context: "Argument 2",
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});
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value = normalizeHeaderValue(value);
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// 2.
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if (!RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, name)) {
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throw new TypeError("Header name is not valid.");
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}
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if (
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StringPrototypeIncludes(value, "\x00") ||
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StringPrototypeIncludes(value, "\x0A") ||
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StringPrototypeIncludes(value, "\x0D")
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) {
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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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name = 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 (list[i][0] === name) {
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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) {
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const headers = {};
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for (const header of this) {
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headers[header[0]] = header[1];
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}
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return `Headers ${inspect(headers)}`;
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}
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get [SymbolToStringTag]() {
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return "Headers";
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}
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}
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webidl.mixinPairIterable("Headers", Headers, _iterableHeaders, 0, 1);
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webidl.configurePrototype(Headers);
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webidl.converters["HeadersInit"] = (V, 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>>"](V, opts);
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}
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return webidl.converters["record<ByteString, ByteString>"](V, opts);
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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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opts,
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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,
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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 = webidl.createBranded(Headers);
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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}
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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}
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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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window.__bootstrap.headers = {
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Headers,
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headersFromHeaderList,
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headerListFromHeaders,
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fillHeaders,
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getDecodeSplitHeader,
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guardFromHeaders,
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};
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})(this);
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