From 7e6601867f08b31cc3ee4373ec748ac1aba2f6cf Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Tue, 22 Oct 2024 08:50:02 +0300
Subject: vnext: RFC 6415: Web Host Metadata

---
 vnext/server/app.js                  |  6 ++++++
 vnext/server/middleware/host-meta.js | 30 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 vnext/server/middleware/host-meta.js

(limited to 'vnext/server')

diff --git a/vnext/server/app.js b/vnext/server/app.js
index b2ba4cf6..f8beb933 100644
--- a/vnext/server/app.js
+++ b/vnext/server/app.js
@@ -13,6 +13,7 @@ import { instance } from './middleware/mastodon'
 import path from 'path'
 import { webhook, webhookPath } from './durov'
 import { webfinger } from './middleware/webfinger'
+import { jsonMeta, xmlMeta } from './middleware/host-meta'
 
 // initialize the application and create the routes
 export const app = express()
@@ -25,6 +26,11 @@ router.get('/api/v2/oembed', oembed)
 router.get('/api/v2/urlexpand', urlExpand)
 router.get('/api/apps/android/releases', releases)
 
+// Web Host Metadata
+
+router.get('/.well-known/host-meta', xmlMeta)
+router.get('/.well-known/host-meta.json', jsonMeta)
+
 // WebFinger
 
 router.get('/.well-known/webfinger', webfinger)
diff --git a/vnext/server/middleware/host-meta.js b/vnext/server/middleware/host-meta.js
new file mode 100644
index 00000000..eec7d3e3
--- /dev/null
+++ b/vnext/server/middleware/host-meta.js
@@ -0,0 +1,30 @@
+import config from 'config'
+
+const baseURL = config.get('service.baseURL')
+
+/**
+ * host-meta endpoint
+ * @type {import('express').RequestParamHandler}
+ */
+export const xmlMeta = async (_req, res) => {
+    return res.set('Content-Type', 'text/xml')
+        .send(`<?xml version="1.0" encoding="UTF-8"?>
+            <XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
+            <Link rel="lrdd" template="${baseURL}/.well-known/webfinger?resource={uri}"/>
+            </XRD>`)
+}
+
+/**
+ * host-meta endpoint
+ * @type {import('express').RequestParamHandler}
+ */
+export const jsonMeta = async (_req, res) => {
+    return res.json({
+        'links': [
+            {
+                'rel': 'lrdd',
+                'template': `${baseURL}/.well-known/webfinger?resource={uri}`
+            }
+        ]
+    })
+}
-- 
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