chore: align fetch to spec (#10203)

This commit aligns the `fetch` API and the `Request` / `Response`
classes belonging to it to the spec. This commit enables all the
relevant `fetch` WPT tests. Spec compliance is now at around 90%.

Performance is essentially identical now (within 1% of 1.9.0).

1 files changed, 41 insertions, 0 deletions

diff --git a/op_crates/fetch/22_http_client.js b/op_crates/fetch/22_http_client.js
new file mode 100644
index 000000000..0a4be9e9f
--- /dev/null
+++ b/op_crates/fetch/22_http_client.js
@@ -0,0 +1,41 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+// @ts-check
+/// <reference path="../webidl/internal.d.ts" />
+/// <reference path="../web/internal.d.ts" />
+/// <reference path="../url/internal.d.ts" />
+/// <reference path="../file/internal.d.ts" />
+/// <reference path="../file/lib.deno_file.d.ts" />
+/// <reference path="./internal.d.ts" />
+/// <reference path="./11_streams_types.d.ts" />
+/// <reference path="./lib.deno_fetch.d.ts" />
+/// <reference lib="esnext" />
+"use strict";
+
+((window) => {
+  const core = window.Deno.core;
+
+  /**
+   * @param {Deno.CreateHttpClientOptions} options
+   * @returns {HttpClient}
+   */
+  function createHttpClient(options) {
+    return new HttpClient(core.opSync("op_create_http_client", options));
+  }
+
+  class HttpClient {
+    /**
+     * @param {number} rid 
+     */
+    constructor(rid) {
+      this.rid = rid;
+    }
+    close() {
+      core.close(this.rid);
+    }
+  }
+
+  window.__bootstrap.fetch ??= {};
+  window.__bootstrap.fetch.createHttpClient = createHttpClient;
+  window.__bootstrap.fetch.HttpClient = HttpClient;
+})(globalThis);