Support for the basics of federation (#1)

Reviewed-on: #1

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+	"recommendations": [
+		"denoland.vscode-deno"
+	]
+}

deno.json

@@ -1,14 +1,35 @@
 {
-  "tasks": {
-    "dev": "deno run --watch src/main.ts"
-  },
-  "imports": {
-    "@fedify/fedify": "jsr:@fedify/fedify@^1.0.2",
-    "@fedify/redis": "jsr:@fedify/redis@^0.3.0",
-    "@std/assert": "jsr:@std/assert@1",
-    "ioredis": "npm:ioredis@^5.4.1"
-  },
-  "unstable": [
-    "temporal"
-  ]
+	"imports": {
+		"@fedify/fedify": "jsr:@fedify/fedify@^1.0.2",
+		"@fedify/redis": "jsr:@fedify/redis@^0.3.0",
+		"@logtape/logtape": "jsr:@logtape/logtape@^0.6.3",
+		"@std/assert": "jsr:@std/assert@1",
+		"@hongminhee/x-forwarded-fetch": "jsr:@hongminhee/x-forwarded-fetch@^0.2.0",
+		"@@npm/ioredis": "npm:ioredis@^5.4.1"
+	},
+	"unstable": [
+		"temporal"
+	],
+	"lint": {
+		"rules": {
+			"exclude": [
+				"no-implicit-any",
+				"no-explicit-any",
+				"no-inner-declarations",
+				"no-var"
+			]
+		}
+	},
+	"fmt": {
+		"include": [
+			"src/**",
+			"tests/**"
+		],
+		"indentWidth": 4,
+		"lineWidth": 280,
+		"semiColons": false,
+		"proseWrap": "never",
+		"singleQuote": false,
+		"useTabs": true
+	}
 }

deno.lock

@@ -4,15 +4,14 @@
     "specifiers": {
       "jsr:@fedify/fedify@^1.0.2": "jsr:@fedify/fedify@1.0.2",
       "jsr:@fedify/redis@^0.3.0": "jsr:@fedify/redis@0.3.0",
+      "jsr:@hongminhee/x-forwarded-fetch@^0.2.0": "jsr:@hongminhee/x-forwarded-fetch@0.2.0",
       "jsr:@hugoalh/http-header-link@^1.0.2": "jsr:@hugoalh/http-header-link@1.0.2",
       "jsr:@hugoalh/is-string-singleline@1.0.2": "jsr:@hugoalh/is-string-singleline@1.0.2",
       "jsr:@logtape/logtape@^0.6.2": "jsr:@logtape/logtape@0.6.3",
       "jsr:@logtape/logtape@^0.6.3": "jsr:@logtape/logtape@0.6.3",
-      "jsr:@std/assert@1": "jsr:@std/assert@1.0.6",
       "jsr:@std/bytes@^1.0.2": "jsr:@std/bytes@1.0.2",
       "jsr:@std/encoding@^1.0.5": "jsr:@std/encoding@1.0.5",
       "jsr:@std/http@^1.0.6": "jsr:@std/http@1.0.8",
-      "jsr:@std/internal@^1.0.4": "jsr:@std/internal@1.0.4",
       "jsr:@std/semver@^1.0.3": "jsr:@std/semver@1.0.3",
       "npm:@phensley/language-tag@^1.9.0": "npm:@phensley/language-tag@1.9.0",
       "npm:asn1js@^3.0.5": "npm:asn1js@3.0.5",
@@ -52,6 +51,9 @@
           "jsr:@logtape/logtape@^0.6.3"
         ]
       },
+      "@hongminhee/x-forwarded-fetch@0.2.0": {
+        "integrity": "8a347e061974e07b480e9461c7d84047e12e92c462fe7679a6f0f59b5c5f48d5"
+      },
       "@hugoalh/http-header-link@1.0.2": {
         "integrity": "1f607e34ac0790a0b0759f89ade294ab3a1d211e46a8dea337eaafa26950205f",
         "dependencies": [
@@ -64,12 +66,6 @@
       "@logtape/logtape@0.6.3": {
         "integrity": "64cac3459fddf0455b85d36c8ca3e21764d6b2965c426fb40a0e4a98be436d2b"
       },
-      "@std/assert@1.0.6": {
-        "integrity": "1904c05806a25d94fe791d6d883b685c9e2dcd60e4f9fc30f4fc5cf010c72207",
-        "dependencies": [
-          "jsr:@std/internal@^1.0.4"
-        ]
-      },
       "@std/bytes@1.0.2": {
         "integrity": "fbdee322bbd8c599a6af186a1603b3355e59a5fb1baa139f8f4c3c9a1b3e3d57"
       },
@@ -79,9 +75,6 @@
       "@std/http@1.0.8": {
         "integrity": "6ea1b2e8d33929967754a3b6d6c6f399ad6647d7bbb5a466c1eaf9b294a6ebcd"
       },
-      "@std/internal@1.0.4": {
-        "integrity": "62e8e4911527e5e4f307741a795c0b0a9e6958d0b3790716ae71ce085f755422"
-      },
       "@std/semver@1.0.3": {
         "integrity": "7c139c6076a080eeaa4252c78b95ca5302818d7eafab0470d34cafd9930c13c8"
       }
@@ -348,6 +341,8 @@
     "dependencies": [
       "jsr:@fedify/fedify@^1.0.2",
       "jsr:@fedify/redis@^0.3.0",
+      "jsr:@hongminhee/x-forwarded-fetch@^0.2.0",
+      "jsr:@logtape/logtape@^0.6.3",
       "jsr:@std/assert@1",
       "npm:ioredis@^5.4.1"
     ]

src/federation.ts

@@ -0,0 +1,42 @@
+import { createFederation, Follow, Service } from "@fedify/fedify"
+import { kv } from "./redis.ts"
+import { getLogger } from "https://jsr.io/@logtape/logtape/0.6.3/logtape/logger.ts"
+
+const l = getLogger(["dotino-veloce", "federation"])
+
+l.debug`Creating federation object...`
+export const federation = createFederation<void>({ kv })
+
+l.debug`Creating actor dispatcher...`
+// deno-lint-ignore require-await
+async function actorDispatcher(ctx: any, handle: string) {
+	l.debug`Received request for actor ${handle}, handling...`
+
+	if (handle !== "service") {
+		l.debug`No match found for ${handle}, returning null.`
+		return null
+	}
+
+	l.debug`Determining id of actor ${handle}...`
+	const id = ctx.getActorUri(handle)
+
+	l.info`Returning actor: ${id.href}`
+	return new Service({
+		id,
+		name: "[TEST] Dotino Veloce",
+		summary: "Core account of a Dotino Veloce instance.",
+		preferredUsername: id.href,
+		// Akkoma expects URL to be equal to ID
+		// https://akkoma.dev/AkkomaGang/akkoma/src/commit/f1018867097e6f293d8b2b5b6935f0a7ebf99bd0/lib/pleroma/object/fetcher.ex#L287
+		url: id,
+		inbox: ctx.getInboxUri(handle),
+	})
+}
+
+l.debug`Connecting actor dispatcher to federation object...`
+federation.setActorDispatcher("/users/{identifier}", actorDispatcher)
+
+// Akkoma requires inboxes to be setup to display profiles
+// https://akkoma.dev/AkkomaGang/akkoma/src/commit/f1018867097e6f293d8b2b5b6935f0a7ebf99bd0/lib/pleroma/web/activity_pub/object_validators/user_validator.ex#L72
+l.debug`Initializing inbox listener...`
+federation.setInboxListeners("/inbox/{identifier}") // I don't really care about the shared inbox for this project

src/handler.ts

@@ -0,0 +1,40 @@
+import { getLogger } from "@logtape/logtape"
+import { behindProxy, Fetch } from "@hongminhee/x-forwarded-fetch"
+import { federation } from "./federation.ts"
+
+const l = getLogger(["dotino-veloce", "handler"])
+
+l.debug`Creating Deno handler...`
+function handler(request: Request, _info: Deno.ServeHandlerInfo) {
+	l.debug`Received a request, processing...`
+
+	const agent = request.headers.get("User-Agent")
+	const requestUrl = new URL(request.url)
+	l.debug`Received request from ${agent} to ${requestUrl.href}`
+
+	// Akkoma expects host-meta to be correctly setup
+	// https://akkoma.dev/AkkomaGang/akkoma/src/commit/f1018867097e6f293d8b2b5b6935f0a7ebf99bd0/lib/pleroma/web/web_finger.ex#L177
+	l.debug`Routing request to: ${requestUrl.pathname}`
+	if (requestUrl.pathname === "/.well-known/host-meta") {
+		l.debug`Intercepting request to inject host-meta for ${requestUrl.origin}`
+		return new Response(
+			`<?xml version="1.0" encoding="UTF-8"?><XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0"><Link type="application/xrd+xml" template="${requestUrl.origin}/.well-known/webfinger?resource={uri}" rel="lrdd" /></XRD>`,
+			{
+				headers: {
+					"Content-Type": "application/xml",
+				},
+			},
+		)
+	}
+
+	l.debug`Delegating request to Federation...`
+	return federation.fetch(
+		request,
+		{
+			contextData: undefined,
+		},
+	)
+}
+
+l.debug`Creating proxyied Deno handler...`
+export const proxyHandler: Deno.ServeHandler = behindProxy(handler as Fetch) // Should be good.

src/main.ts

@@ -1,30 +1,24 @@
-import {createFederation} from "@fedify/fedify"
-import {RedisKvStore} from "https://jsr.io/@fedify/redis/0.3.0/src/kv.ts"
-import {Redis} from "ioredis";
+import { configure, getConsoleSink, getLogger } from "@logtape/logtape"
+import { proxyHandler } from "./handler.ts"
 
+await configure({
+	sinks: { console: getConsoleSink() },
+	filters: {},
+	loggers: [
+		{ category: ["logtape", "meta"], sinks: ["console"], level: "warning" },
+		{ category: ["fedify"], sinks: ["console"], level: "info" },
+		{ category: ["dotino-veloce"], sinks: ["console"], level: "debug" },
+	],
+})
 
-const federation = createFederation<void>({
-	kv: new RedisKvStore(
-		new Redis({}),
-		{}
-	),
-});
-
-const handler: Deno.ServeHandler = function handler(request) {
-	const response = federation.fetch(
-		request,
-		{
-			contextData: undefined,
-		}
-	)
-	
-	return response
-}
-
+const l = getLogger(["dotino-veloce", "main"])
 
+l.info`Starting server...`
 Deno.serve(
 	{
-		port: 8080
+		port: 8080,
+		onListen: (_localAddr) => {
+		},
 	},
-	handler
+	proxyHandler,
 )

src/redis.ts

@@ -0,0 +1,11 @@
+import { RedisKvStore } from "@fedify/redis"
+import { getLogger } from "@logtape/logtape"
+import { Redis } from "@@npm/ioredis"
+
+const l = getLogger(["dotino-veloce", "redis"])
+
+l.debug`Creating redis object...`
+export const redis = new Redis({})
+
+l.debug`Creating federation object...`
+export const kv = new RedisKvStore(redis, {})

tests/main_test.ts

@@ -1,6 +1,6 @@
-import { assertEquals } from "@std/assert";
-import { add } from "../src/main.ts";
+import { assertEquals } from "@std/assert"
+import { add } from "../src/main.ts"
 
 Deno.test(function addTest() {
-  assertEquals(add(2, 3), 5);
-});
+	assertEquals(add(2, 3), 5)
+})