refactor: set removal version for Deno.RequestEvent, Deno.HttpConn and Deno.serveHttp() (#22034)

This change:
1. Sets the removal version for `Deno.RequestEvent`, `Deno.HttpConn` and
`Deno.serveHttp()` for Deno v2. I thought it might be worth calling
`warnOnDeprecatedApi()` within `Deno.Request` and `Deno.HttpConn`
methods, but I thought just having it called within `Deno.serveHttp()`
might be sufficient.
2. Removes some possibly unneeded related benchmarks.

Towards #22021

cli/bench/http/deno_http_native.js

@@ -1,19 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const listener = Deno.listen({ hostname, port: Number(port) });
-console.log("Server listening on", addr);
-
-const encoder = new TextEncoder();
-const body = encoder.encode("Hello World");
-
-for await (const conn of listener) {
-  (async () => {
-    const requests = Deno.serveHttp(conn);
-    for await (const event of requests) {
-      event.respondWith(new Response(body))
-        .catch((e) => console.log(e));
-    }
-  })();
-}

cli/bench/http/deno_http_native_headers.js

@@ -1,24 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const listener = Deno.listen({ hostname, port: Number(port) });
-console.log("Server listening on", addr);
-
-for await (const conn of listener) {
-  (async () => {
-    const requests = Deno.serveHttp(conn);
-    for await (const { respondWith } of requests) {
-      respondWith(
-        new Response("Hello World", {
-          status: 200,
-          headers: {
-            server: "deno",
-            "content-type": "text/plain",
-          },
-        }),
-      )
-        .catch((e) => console.log(e));
-    }
-  })();
-}

cli/bench/http/deno_http_read_headers.js

@@ -1,17 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const listener = Deno.listen({ hostname, port: Number(port) });
-console.log("Server listening on", addr);
-
-for await (const conn of listener) {
-  (async () => {
-    const requests = Deno.serveHttp(conn);
-    for await (const { respondWith, request } of requests) {
-      const bar = request.headers.get("foo");
-      respondWith(new Response(bar))
-        .catch((e) => console.log(e));
-    }
-  })();
-}

cli/bench/http/deno_post_bin.js

@@ -1,19 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const listener = Deno.listen({ hostname, port: Number(port) });
-console.log("Server listening on", addr);
-
-for await (const conn of listener) {
-  (async () => {
-    const requests = Deno.serveHttp(conn);
-    for await (const { respondWith, request } of requests) {
-      if (request.method == "POST") {
-        const buffer = await request.arrayBuffer();
-        respondWith(new Response(buffer.byteLength))
-          .catch((e) => console.log(e));
-      }
-    }
-  })();
-}

cli/bench/http/deno_post_json.js

@@ -1,19 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-const addr = Deno.args[0] || "127.0.0.1:4500";
-const [hostname, port] = addr.split(":");
-const listener = Deno.listen({ hostname, port: Number(port) });
-console.log("Server listening on", addr);
-
-for await (const conn of listener) {
-  (async () => {
-    const requests = Deno.serveHttp(conn);
-    for await (const { respondWith, request } of requests) {
-      if (request.method == "POST") {
-        const json = await request.json();
-        respondWith(new Response(json.hello))
-          .catch((e) => console.log(e));
-      }
-    }
-  })();
-}

cli/tsc/dts/lib.deno.ns.d.ts

@@ -5297,7 +5297,8 @@ declare namespace Deno {
    * request from a remote client.
    *
    * @category HTTP Server
-   * @deprecated Use {@linkcode serve} instead.
+   * @deprecated Use {@linkcode Deno.serve} instead. This will be removed in
+   * Deno 2.0.
    */
   export interface RequestEvent {
     /** The request from the client in the form of the web platform
@@ -5318,7 +5319,8 @@ declare namespace Deno {
    * requests on the HTTP server connection.
    *
    * @category HTTP Server
-   * @deprecated Use {@linkcode serve} instead.
+   * @deprecated Use {@linkcode Deno.serve} instead. This will be removed in
+   * Deno 2.0.
    */
   export interface HttpConn extends AsyncIterable<RequestEvent>, Disposable {
     /** The resource ID associated with this connection. Generally users do not
@@ -5384,7 +5386,8 @@ declare namespace Deno {
    * used elsewhere. In such a case, this function will fail.
    *
    * @category HTTP Server
-   * @deprecated Use {@linkcode serve} instead.
+   * @deprecated Use {@linkcode Deno.serve} instead. This will be removed in
+   * Deno 2.0.
    */
   export function serveHttp(conn: Conn): HttpConn;
 

runtime/js/40_http.js

@@ -1,5 +1,5 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-import { core } from "ext:core/mod.js";
+import { core, internals } from "ext:core/mod.js";
 const {
   op_http_start,
 } = core.ensureFastOps();
@@ -7,6 +7,11 @@ const {
 import { HttpConn } from "ext:deno_http/01_http.js";
 
 function serveHttp(conn) {
+  internals.warnOnDeprecatedApi(
+    "Deno.serveHttp()",
+    new Error().stack,
+    "Use `Deno.serve()` instead.",
+  );
   const rid = op_http_start(conn.rid);
   return new HttpConn(rid, conn.remoteAddr, conn.localAddr);
 }