Add /xml httpbin-compatible endpoint

Author: pimterry

src/endpoints/http-index.ts

@@ -32,6 +32,7 @@ export * from './http/delay.js';
 export * from './http/cookies.js'
 export * from './http/basic-auth.js';
 export * from './http/json.js';
+export * from './http/xml.js';
 export * from './http/trailers.js';
 export * from './http/error/close.js';
 export * from './http/error/reset.js';

src/endpoints/http/xml.ts

@@ -0,0 +1,40 @@
+import { HttpEndpoint, HttpHandler } from '../http-index.js';
+
+const matchPath = (path: string) => path === '/xml';
+
+const handle: HttpHandler = (req, res) => {
+    res.writeHead(200, {
+        'content-type': 'application/xml'
+    });
+
+    // HTTPBin seems to just return this fixed example document:
+    res.end(`<?xml version='1.0' encoding='us-ascii'?>
+
+<!--  A SAMPLE set of slides  -->
+
+<slideshow 
+    title="Sample Slide Show"
+    date="Date of publication"
+    author="Yours Truly"
+    >
+
+    <!-- TITLE SLIDE -->
+    <slide type="all">
+      <title>Wake up to WonderWidgets!</title>
+    </slide>
+
+    <!-- OVERVIEW -->
+    <slide type="all">
+        <title>Overview</title>
+        <item>Why <em>WonderWidgets</em> are great</item>
+        <item/>
+        <item>Who <em>buys</em> WonderWidgets</item>
+    </slide>
+
+</slideshow>`);
+}
+
+export const xml: HttpEndpoint = {
+    matchPath,
+    handle
+};