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-rw-r--r--cli/js2/20_headers.js257
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diff --git a/cli/js2/20_headers.js b/cli/js2/20_headers.js
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-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-
-((window) => {
- const { DomIterableMixin } = window.__bootstrap.domIterable;
- const { requiredArguments } = window.__bootstrap.webUtil;
- const { customInspect } = window.__bootstrap.console;
-
- // From node-fetch
- // Copyright (c) 2016 David Frank. MIT License.
- const invalidTokenRegex = /[^\^_`a-zA-Z\-0-9!#$%&'*+.|~]/;
- const invalidHeaderCharRegex = /[^\t\x20-\x7e\x80-\xff]/;
-
- function isHeaders(value) {
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- return value instanceof Headers;
- }
-
- const headersData = Symbol("headers data");
-
- // TODO: headerGuard? Investigate if it is needed
- // node-fetch did not implement this but it is in the spec
- function normalizeParams(name, value) {
- name = String(name).toLowerCase();
- value = String(value).trim();
- return [name, value];
- }
-
- // The following name/value validations are copied from
- // https://github.com/bitinn/node-fetch/blob/master/src/headers.js
- // Copyright (c) 2016 David Frank. MIT License.
- function validateName(name) {
- if (invalidTokenRegex.test(name) || name === "") {
- throw new TypeError(`${name} is not a legal HTTP header name`);
- }
- }
-
- function validateValue(value) {
- if (invalidHeaderCharRegex.test(value)) {
- throw new TypeError(`${value} is not a legal HTTP header value`);
- }
- }
-
- /** Appends a key and value to the header list.
- *
- * The spec indicates that when a key already exists, the append adds the new
- * value onto the end of the existing value. The behaviour of this though
- * varies when the key is `set-cookie`. In this case, if the key of the cookie
- * already exists, the value is replaced, but if the key of the cookie does not
- * exist, and additional `set-cookie` header is added.
- *
- * The browser specification of `Headers` is written for clients, and not
- * servers, and Deno is a server, meaning that it needs to follow the patterns
- * expected for servers, of which a `set-cookie` header is expected for each
- * unique cookie key, but duplicate cookie keys should not exist. */
- function dataAppend(
- data,
- key,
- value,
- ) {
- for (let i = 0; i < data.length; i++) {
- const [dataKey] = data[i];
- if (key === "set-cookie" && dataKey === "set-cookie") {
- const [, dataValue] = data[i];
- const [dataCookieKey] = dataValue.split("=");
- const [cookieKey] = value.split("=");
- if (dataCookieKey === cookieKey) {
- data[i][1] = value;
- return;
- }
- } else {
- if (dataKey === key) {
- data[i][1] += `, ${value}`;
- return;
- }
- }
- }
- data.push([key, value]);
- }
-
- /** Gets a value of a key in the headers list.
- *
- * This varies slightly from spec behaviour in that when the key is `set-cookie`
- * the value returned will look like a concatenated value, when in fact, if the
- * headers were iterated over, each individual `set-cookie` value is a unique
- * entry in the headers list. */
- function dataGet(
- data,
- key,
- ) {
- const setCookieValues = [];
- for (const [dataKey, value] of data) {
- if (dataKey === key) {
- if (key === "set-cookie") {
- setCookieValues.push(value);
- } else {
- return value;
- }
- }
- }
- if (setCookieValues.length) {
- return setCookieValues.join(", ");
- }
- return undefined;
- }
-
- /** Sets a value of a key in the headers list.
- *
- * The spec indicates that the value should be replaced if the key already
- * exists. The behaviour here varies, where if the key is `set-cookie` the key
- * of the cookie is inspected, and if the key of the cookie already exists,
- * then the value is replaced. If the key of the cookie is not found, then
- * the value of the `set-cookie` is added to the list of headers.
- *
- * The browser specification of `Headers` is written for clients, and not
- * servers, and Deno is a server, meaning that it needs to follow the patterns
- * expected for servers, of which a `set-cookie` header is expected for each
- * unique cookie key, but duplicate cookie keys should not exist. */
- function dataSet(
- data,
- key,
- value,
- ) {
- for (let i = 0; i < data.length; i++) {
- const [dataKey] = data[i];
- if (dataKey === key) {
- // there could be multiple set-cookie headers, but all others are unique
- if (key === "set-cookie") {
- const [, dataValue] = data[i];
- const [dataCookieKey] = dataValue.split("=");
- const [cookieKey] = value.split("=");
- if (cookieKey === dataCookieKey) {
- data[i][1] = value;
- return;
- }
- } else {
- data[i][1] = value;
- return;
- }
- }
- }
- data.push([key, value]);
- }
-
- function dataDelete(data, key) {
- let i = 0;
- while (i < data.length) {
- const [dataKey] = data[i];
- if (dataKey === key) {
- data.splice(i, 1);
- } else {
- i++;
- }
- }
- }
-
- function dataHas(data, key) {
- for (const [dataKey] of data) {
- if (dataKey === key) {
- return true;
- }
- }
- return false;
- }
-
- // ref: https://fetch.spec.whatwg.org/#dom-headers
- class HeadersBase {
- constructor(init) {
- if (init === null) {
- throw new TypeError(
- "Failed to construct 'Headers'; The provided value was not valid",
- );
- } else if (isHeaders(init)) {
- this[headersData] = [...init];
- } else {
- this[headersData] = [];
- if (Array.isArray(init)) {
- for (const tuple of init) {
- // If header does not contain exactly two items,
- // then throw a TypeError.
- // ref: https://fetch.spec.whatwg.org/#concept-headers-fill
- requiredArguments(
- "Headers.constructor tuple array argument",
- tuple.length,
- 2,
- );
-
- this.append(tuple[0], tuple[1]);
- }
- } else if (init) {
- for (const [rawName, rawValue] of Object.entries(init)) {
- this.append(rawName, rawValue);
- }
- }
- }
- }
-
- [customInspect]() {
- let length = this[headersData].length;
- let output = "";
- for (const [key, value] of this[headersData]) {
- const prefix = length === this[headersData].length ? " " : "";
- const postfix = length === 1 ? " " : ", ";
- output = output + `${prefix}${key}: ${value}${postfix}`;
- length--;
- }
- return `Headers {${output}}`;
- }
-
- // ref: https://fetch.spec.whatwg.org/#concept-headers-append
- append(name, value) {
- requiredArguments("Headers.append", arguments.length, 2);
- const [newname, newvalue] = normalizeParams(name, value);
- validateName(newname);
- validateValue(newvalue);
- dataAppend(this[headersData], newname, newvalue);
- }
-
- delete(name) {
- requiredArguments("Headers.delete", arguments.length, 1);
- const [newname] = normalizeParams(name);
- validateName(newname);
- dataDelete(this[headersData], newname);
- }
-
- get(name) {
- requiredArguments("Headers.get", arguments.length, 1);
- const [newname] = normalizeParams(name);
- validateName(newname);
- return dataGet(this[headersData], newname) ?? null;
- }
-
- has(name) {
- requiredArguments("Headers.has", arguments.length, 1);
- const [newname] = normalizeParams(name);
- validateName(newname);
- return dataHas(this[headersData], newname);
- }
-
- set(name, value) {
- requiredArguments("Headers.set", arguments.length, 2);
- const [newname, newvalue] = normalizeParams(name, value);
- validateName(newname);
- validateValue(newvalue);
- dataSet(this[headersData], newname, newvalue);
- }
-
- get [Symbol.toStringTag]() {
- return "Headers";
- }
- }
-
- class Headers extends DomIterableMixin(HeadersBase, headersData) {}
-
- window.__bootstrap.headers = {
- Headers,
- };
-})(this);
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-26 06:50:31 +0000