ActivityPub attempt 2: it actually works this time

Use Node.js Express app to serve both statically generated content and dynamic AP stuff
2019-02-20 17:12:29 -05:00 · 2019-02-20 17:12:29 -05:00 · 2adb93395e
parent 88212c3981
commit 2adb93395e
15 changed files with 1171 additions and 76 deletions
--- a/.gitignore
+++ b/.gitignore
@ -2,3 +2,5 @@
 node_modules/
 built/
 out/
+*.pem
+*.db
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@ -12,7 +12,15 @@
 			"preLaunchTask": "tsc: build - tsconfig.json",
 			"outFiles": [
 				"${workspaceFolder}/built/*.js"
-			]
+			],
+			"env": {
+				// "DOMAIN": "shadowfacts.net",
+				"DOMAIN": "b2dee2f2.ngrok.io",
+				"DB_PATH": "activitypub.db",
+				"PUB_KEY_PEM": "public.pem",
+				"PRIV_KEY_PEM": "private.pem"
+			},
+			"console": "integratedTerminal"
 		}
 	]
 }
--- a/lib/activitypub/activity.ts
+++ b/lib/activitypub/activity.ts
@ -0,0 +1,40 @@
+export interface Activity {
+	actor: string;
+	type: string;
+	id: string;
+}
+
+export interface Article extends Activity {
+	to: string[];
+	cc: string[];
+}
+
+export interface Create extends Activity {
+	to: string[];
+	cc: string[];
+	object: Activity;
+}
+
+export interface Follow extends Activity {
+	object: string;
+}
+
+export interface Accept extends Activity {
+	object: Follow;
+}
+
+export interface Undo extends Activity {
+	object: Activity;
+}
+
+export interface Note extends Activity {
+	inReplyTo: string;
+	published: string;
+	content: string;
+	attributedTo: string;
+}
+
+export interface Actor {
+	id: string;
+	inbox: string;
+}
--- a/lib/activitypub/actor.ts
+++ b/lib/activitypub/actor.ts
@ -0,0 +1,44 @@
+import express, { Router } from "express";
+import { promises as fs } from "fs";
+
+const domain = process.env.DOMAIN;
+
+export default async function actor(): Promise<Router> {
+	const router = Router();
+
+	const pubKeyPem = (await fs.readFile(process.env.PUB_KEY_PEM!)).toString();
+	const actorObj = {
+		"@context": [
+			"https://www.w3.org/ns/activitystreams",
+			"https://w3id.org/security/v1"
+		],
+		"type": "Person",
+		"id": `https://${domain}/ap/actor`,
+		"preferredUsername": "shadowfacts",
+		"name": "shadowfacts' blog",
+		"icon": {
+			"type": "Image",
+			"mediaType": "image/png",
+			"url": `https://${domain}/shadowfacts.png`
+		},
+		"inbox": `https://${domain}/ap/inbox`,
+		"followers": `https://${domain}/ap/actor/followers`,
+		"publicKey": {
+			"id": `https://${domain}/ap/actor#main-key`,
+			"owner": `https://${domain}/ap/actor`,
+			"publicKeyPem": pubKeyPem
+		}
+	};
+
+	router.get("/ap/actor", (req, res) => {
+		if (req.accepts("application/activity+json")) {
+			res.type("application/activity+json");
+			res.json(actorObj);
+			res.end();
+		} else {
+			res.redirect("/");
+		}
+	});
+
+	return router;
+}
--- a/lib/activitypub/articles.ts
+++ b/lib/activitypub/articles.ts
@ -0,0 +1,79 @@
+import express, { Router, Request, Response } from "express";
+import { Page, PostMetadata } from "../metadata";
+import { Article } from "./activity";
+import { Database } from "sqlite3";
+
+const domain = process.env.DOMAIN;
+
+export async function setup(posts: Page[], db: Database) {
+	for (const post of posts) {
+		const postMeta = <PostMetadata>post.metadata;
+		const articleObject = {
+			"@context": [
+				"https://www.w3.org/ns/activitystreams",
+			],
+			"type": "Article",
+			"id": `https://${domain}${post.metadata.permalink}`,
+			"published": (<Date>postMeta.date).toISOString(),
+			"inReplyTo": null,
+			"url": `https://${domain}${postMeta.permalink}`,
+			"attributedTo": `https://${domain}/ap/actor`,
+			"to": [
+				"https://www.w3.org/ns/activitystreams#Public"
+			],
+			"cc": [
+				`https://${domain}/ap/actor/followers`
+			],
+			"name": postMeta.title,
+			"content": post.text
+		};
+		db.run("INSERT OR IGNORE INTO articles(id, article_doc, has_federated) VALUES($id, $article_doc, $has_federated)", {
+			$id: postMeta.permalink,
+			$article_doc: JSON.stringify(articleObject),
+			$has_federated: 0
+		}, (err) => {
+			if (err) console.log(`Encountered error inserting article ${postMeta.permalink}`, err);
+		});
+	}
+}
+
+export async function toFederate(db: Database): Promise<[string, Article][]> {
+	return new Promise((resolve, reject) => {
+		db.all("SELECT id, article_doc FROM articles WHERE has_federated = $has_federated", {
+			$has_federated: 0
+		}, (err, rows) => {
+			if (err) reject(err);
+			else {
+				let result: [string, Article][] = [];
+				for (const row of rows) {
+					result.push([row.id, JSON.parse(row.article_doc)]);
+				}
+				resolve(result);
+			}
+		});
+	});
+}
+
+export function router(): Router {
+	const router = Router();
+
+	router.use("/:category/:year/:slug/", (req, res, next) => {
+		if (req.accepts("text/html")) {
+			next();
+		} else {
+			const db = <Database>req.app.get("db")
+			db.get("SELECT article_doc FROM articles WHERE id = $id", {
+				$id: `/${req.params.category}/${req.params.year}/${req.params.slug}/`
+			}, (err, result) => {
+				if (err) {
+					res.status(500).end(err);
+					return;
+				}
+				res.type("application/json");
+				res.end(result.article_doc);
+			});
+		}
+	});
+
+	return router;
+}
--- a/lib/activitypub/federate.ts
+++ b/lib/activitypub/federate.ts
@ -0,0 +1,99 @@
+import { promises as fs } from "fs";
+import crypto from "crypto";
+import uuidv4 from "uuid/v4";
+import request from "request";
+import { Database } from "sqlite3";
+import { Activity, Article, Create, Actor, Follow, Accept } from "./activity";
+import { URL } from "url";
+
+const domain = process.env.DOMAIN;
+
+function createActivity(article: Article): Create {
+	const uuid = uuidv4();
+	const createObject = {
+		"@context": [
+			"https://www.w3.org/ns/activitystreams"
+		],
+		"type": "Create",
+		"id": `https://${domain}/ap/${uuid}`,
+		"actor": `https://${domain}/ap/actor`,
+		"to": article.to,
+		"cc": article.cc,
+		"object": article
+	};
+	return createObject;
+}
+
+export async function fetchActor(url: string): Promise<Actor> {
+	return new Promise((resolve, reject) => {
+		request({
+			url,
+			headers: {
+				"Accept": "application/activity+json"
+			},
+			method: "GET",
+			json: true
+		}, (err, res) => {
+			if (err) reject(err);
+			else resolve(<Actor>res.body);
+		});
+	});
+}
+
+export async function signAndSend(activity: Activity, inbox: string) {
+	const targetDomain = new URL(inbox).hostname;
+	const inboxFragment = inbox.replace("https://" + targetDomain, "");
+	const date = new Date();
+	const privKey = (await fs.readFile(process.env.PRIV_KEY_PEM!)).toString();
+	const signer = crypto.createSign("sha256");
+	const stringToSign = `(request-target): post ${inboxFragment}\nhost: ${targetDomain}\ndate: ${date.toUTCString()}`;
+	signer.update(stringToSign);
+	signer.end();
+	const signature = signer.sign(privKey);
+	const base64Signature = signature.toString("base64");
+	const header = `keyId="https://${domain}/ap/actor#main-key",headers="(request-target) host date",signature="${base64Signature}"`;
+	console.log("Sending:", activity);
+	console.log("stringToSign:", stringToSign);
+	console.log("Signature: " + header);
+	request({
+		url: inbox,
+		headers: {
+			"Host": targetDomain,
+			"Date": date.toUTCString(),
+			"Signature": header,
+			"Accept": "application/activity+json, application/json"
+		},
+		method: "POST",
+		json: true,
+		body: activity
+	}, (err, res) => {
+		console.log("Sent message to inbox at", targetDomain);
+		console.log("Response status code", res.statusCode);
+		console.log(res.body);
+		if (err) console.log("Error:", err, res);
+	});
+}
+
+async function sendToFollowers(activity: Create, db: Database) {
+	db.each("SELECT inbox FROM followers", (err, result) => {
+		if (err) {
+			console.log("Error getting followers: ", err);
+			return;
+		}
+		const inbox = "https://" + new URL(result.inbox).host + "/inbox";
+		console.log(`Federating ${activity.object.id} to ${inbox}`);
+		signAndSend(activity, inbox);
+	});
+}
+
+export default function federate(toFederate: [string, Article][], db: Database) {
+	for (const [id, article] of toFederate) {
+		
+		sendToFollowers(createActivity(article), db);
+		db.run("UPDATE articles SET has_federated = 1 WHERE id = $id", {
+			$id: id
+		});
+		break;
+	}
+}
+
--- a/lib/activitypub/followers.ts
+++ b/lib/activitypub/followers.ts
@ -0,0 +1,27 @@
+import express, { Router } from "express";
+import { Database } from "sqlite3";
+
+const domain = process.env.DOMAIN;
+
+export default function followers(): Router {
+	const router = Router();
+
+	router.get("/ap/actor/followers", (req, res) => {
+		const db = <Database>req.app.get("db");
+
+		db.all("SELECT id FROM followers", (err, rows) => {
+			res.json({
+				"@context": [
+					"https://www.w3.org/ns/activitystreams"
+				],
+				"type": "OrderedCollection",
+				"id": `https://${domain}/ap/actor/followers`,
+				"totalItems": rows.length,
+				"items": rows.map(row => row.id)
+			});
+			res.end();
+		});
+	});
+
+	return router;
+}
--- a/lib/activitypub/inbox.ts
+++ b/lib/activitypub/inbox.ts
@ -0,0 +1,102 @@
+import { Router, Request, Response } from "express";
+import uuidv4 from "uuid/v4";
+import { fetchActor, signAndSend } from "./federate";
+import { Activity, Follow, Accept, Undo, Create, Note } from "./activity";
+import { Database } from "sqlite3";
+import { URL } from "url";
+
+const domain = process.env.DOMAIN;
+
+export default function inbox(): Router {
+	const router = Router();
+
+	router.post("/ap/inbox", handleInbox);
+	router.post("/inbox", handleInbox);
+
+	return router;
+}
+
+async function handleInbox(req: Request, res: Response) {
+	console.log(req.body);
+	const activity = req.body as Activity;
+	if (activity.type === "Follow") {
+		handleFollow(activity, req, res);
+	} else if (activity.type === "Create") {
+		handleCreate(activity, req, res);
+	} else if (activity.type === "Undo") {
+		handleUndo(activity, req, res);
+	} else {
+		res.end(); // TODO: handle this better
+	}
+}
+
+async function handleFollow(activity: Activity, req: Request, res: Response) {
+	if (typeof req.body.object !== "string") {
+		res.end(); // TODO: handle this better
+		return;
+	}
+	const follow = activity as Follow;
+	if (follow.object !== `https://${domain}/ap/actor`) {
+		res.end();
+		return;
+	}
+	const actor = await fetchActor(follow.actor);
+	const acceptObject = <Accept>{
+		"@context": [
+			"https://www.w3.org/ns/activitystreams",
+			// "https://w3id.org/security/v1"
+		],
+		"id": `https://${domain}/ap/${uuidv4()}`,
+		"type": "Accept",
+		"actor": `https://${domain}/ap/actor`,
+		"object": follow
+	};
+	signAndSend(acceptObject, actor.inbox);
+	const db = req.app.get("db") as Database;
+	const serverInbox = new URL("/inbox", actor.inbox).toString();
+	db.run("INSERT OR IGNORE INTO followers(id, inbox) VALUES($id, $inbox)", {
+		$id: actor.id,
+		$inbox: serverInbox
+	}, (err) => {
+		if (err) console.error(`Encountered error adding follower ${follow.actor}`, err);
+	});
+	res.end();
+}
+
+async function handleCreate(activity: Activity, req: Request, res: Response) {
+	const create = activity as Create;
+	if (create.object.type == "Note") {
+		handleCreateNote(create, req, res);
+	} else {
+		res.end();
+	}
+}
+
+async function handleCreateNote(create: Create, req: Request, res: Response) {
+	const note = create.object as Note;
+	console.log(note);
+}
+
+async function handleUndo(activity: Activity, req: Request, res: Response) {
+	const undo = activity as Undo;
+	if (undo.object.type === "Follow") {
+		handleUndoFollow(undo, req, res);
+	} else {
+		res.end();
+	}
+}
+
+async function handleUndoFollow(undo: Undo, req: Request, res: Response) {
+	const follow = undo.object as Follow;
+	if (follow.object !== `https://${domain}/ap/actor`) {
+		res.end();
+		return;
+	}
+	const db = req.app.get("db") as Database;
+	db.run("DELETE FROM followers WHERE id = $id", {
+		$id: follow.actor
+	}, (err) => {
+		if (err) console.error(`Error unfollowing ${follow.actor}`, err);
+	});
+	res.end();
+}
--- a/lib/activitypub/index.ts
+++ b/lib/activitypub/index.ts
@ -0,0 +1,15 @@
+import actor from "./actor";
+import * as articles from "./articles";
+import federate from "./federate";
+import followers from "./followers";
+import inbox from "./inbox";
+import webfinger from "./webfinger";
+
+export = {
+	actor,
+	articles,
+	federate,
+	followers,
+	inbox,
+	webfinger
+};
--- a/lib/activitypub/webfinger.ts
+++ b/lib/activitypub/webfinger.ts
@ -0,0 +1,23 @@
+import express, { Router } from "express";
+
+const domain = process.env.DOMAIN;
+
+export default function webfinger(): Router {
+	const router = Router();
+
+	router.get("/.well-known/webfinger", (req, res) => {
+		res.json({
+			"subject": `acct:shadowfacts@${domain}`,
+			"links": [
+				{
+					"rel": "self",
+					"type": "application/activity+json",
+					"href": `https://${domain}/ap/actor`
+				}
+			]
+		});
+		res.end();
+	});
+
+	return router;
+}
--- a/lib/generate/activitypub.ts
+++ b/lib/generate/activitypub.ts
@ -1,59 +0,0 @@
-import path from "path";
-import { Page, PostMetadata } from "../metadata";
-import * as util from "../util";
-
-const baseURL = process.env.BASE_URL || "shadowfacts.net";
-
-export default async function activitypub(posts: Page[]) {
-	for (const post of posts) {
-		const object = postObject(post);
-		const dir = path.dirname(post.metadata.permalink);
-		const base = path.basename(post.metadata.permalink);
-		const dest = path.format({
-			dir,
-			name: base,
-			ext: ".json"
-		});
-		const data = JSON.stringify(object);
-		util.write(dest, data);
-		util.write(path.join(post.metadata.permalink, "index.html.json"), data);
-	}
-
-	util.write(".well-known/webfinger", JSON.stringify(webfingerObject()));
-}
-
-function postObject(post: Page): object {
-	const postMeta = <PostMetadata>post.metadata;
-	return {
-		"@context": [
-			"https://www.w3.org/ns/activitystreams"
-		],
-		"type": "Article",
-		"id": `https://${baseURL}${post.metadata.permalink}`,
-		"published": (<Date>postMeta.date).toISOString(),
-		"inReplyTo": null,
-		"url": `https://${baseURL}${postMeta.permalink}`,
-		"attributedTo": `https://${baseURL}/ap/actor`,
-		"to": [
-			"https://www.w3.org/ns/activitystreams#Public"
-		],
-		"cc": [
-			`https://${baseURL}/ap/followers`
-		],
-		"name": postMeta.title,
-		"content": post.text
-	};
-}
-
-function webfingerObject() {
-	return {
-		"subject": `acct:shadowfacts@${baseURL}`,
-		"links": [
-			{
-				"rel": "self",
-				"type": "application/activity+json",
-				"href": `https://${baseURL}/ap/actor`
-			}
-		]
-	};
-}
--- a/lib/generate/index.ts
+++ b/lib/generate/index.ts
@ -1,4 +1,3 @@
-import activitypub from "./activitypub";
 import categories from "./categories";
 import copy from "./copy";
 import css from "./css";
@ -10,7 +9,6 @@ import rss from "./rss";
 import tutorials from "./tutorials";

 export = {
-	activitypub,
 	categories,
 	copy,
 	css,
--- a/lib/index.ts
+++ b/lib/index.ts
@ -1,6 +1,20 @@
-import generators = require("./generate");
+import { Page } from "./metadata";
+import generators from "./generate";

-async function generate() {
+import express from "express";
+import morgan from "morgan";
+import bodyParser from "body-parser";
+import activitypub from "./activitypub";
+
+import sqlite3 from "sqlite3";
+
+const db = new (sqlite3.verbose().Database)(process.env.DB_PATH!);
+
+db.run("CREATE TABLE IF NOT EXISTS followers (id TEXT PRIMARY KEY, inbox TEXT)");
+db.run("CREATE TABLE IF NOT EXISTS articles (id TEXT PRIMARY KEY, article_doc TEXT, has_federated INT)");
+db.run("CREATE TABLE IF NOT EXISTS notes (id TEXT PRIMARY KEY, content TEXT, attributed_to TEXT, in_reply_to TEXT, published TEXT)");
+
+async function generate(): Promise<Page[]> {
 	generators.copy();
 	generators.css();
 	generators.missing();
@ -13,7 +27,35 @@ async function generate() {
 	const categories = await generators.categories(posts);
 	await generators.rss(posts, categories, tutorials);

-	generators.activitypub(posts);
+	return posts;
 }

-generate();
+const app = express();
+app.set("db", db);
+app.use(morgan("dev"));
+app.use(bodyParser.json({ type: "application/activity+json" }));
+
+//db.run("DELETE FROM articles");
+
+(async () => {
+	const posts = await generate();
+
+	await activitypub.articles.setup(posts, db);
+	const toFederate = await activitypub.articles.toFederate(db);
+
+	
+	app.use(await activitypub.actor());
+	app.use(activitypub.followers());
+	app.use(activitypub.inbox());
+	app.use(activitypub.webfinger());
+	app.use(activitypub.articles.router());
+	app.use(express.static("out"));
+
+	const port = process.env.PORT || 8083;
+	app.listen(port, () => {
+		console.log(`Listening on port ${port}`);
+
+		activitypub.federate(toFederate, db);
+	});
+})();
+
--- a/package-lock.json
+++ b/package-lock.json
@ -13,12 +13,61 @@
        "lodash.deburr": "^4.1.0"
      }
    },
+    "@types/body-parser": {
+      "version": "1.17.0",
+      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.17.0.tgz",
+      "integrity": "sha512-a2+YeUjPkztKJu5aIF2yArYFQQp8d51wZ7DavSHjFuY1mqVgidGyzEQ41JIVNy82fXj8yPgy2vJmfIywgESW6w==",
+      "requires": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/caseless": {
+      "version": "0.12.1",
+      "resolved": "https://registry.npmjs.org/@types/caseless/-/caseless-0.12.1.tgz",
+      "integrity": "sha512-FhlMa34NHp9K5MY1Uz8yb+ZvuX0pnvn3jScRSNAb75KHGB8d3rEU6hqMs3Z2vjuytcMfRg6c5CHMc3wtYyD2/A=="
+    },
+    "@types/connect": {
+      "version": "3.4.32",
+      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.32.tgz",
+      "integrity": "sha512-4r8qa0quOvh7lGD0pre62CAb1oni1OO6ecJLGCezTmhQ8Fz50Arx9RUszryR8KlgK6avuSXvviL6yWyViQABOg==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
    "@types/ejs": {
      "version": "2.6.1",
      "resolved": "https://registry.npmjs.org/@types/ejs/-/ejs-2.6.1.tgz",
      "integrity": "sha512-WD8015V8Y+uDfFIjiVHU7t9SgHptqTGGN8w0A2LcrL0NLtqColM15cswkHZMUfodyuTf35sup8vW0hpWRHu0dQ==",
      "dev": true
    },
+    "@types/express": {
+      "version": "4.16.1",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.16.1.tgz",
+      "integrity": "sha512-V0clmJow23WeyblmACoxbHBu2JKlE5TiIme6Lem14FnPW9gsttyHtk6wq7njcdIWH1njAaFgR8gW09lgY98gQg==",
+      "requires": {
+        "@types/body-parser": "*",
+        "@types/express-serve-static-core": "*",
+        "@types/serve-static": "*"
+      }
+    },
+    "@types/express-serve-static-core": {
+      "version": "4.16.1",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.16.1.tgz",
+      "integrity": "sha512-QgbIMRU1EVRry5cIu1ORCQP4flSYqLM1lS5LYyGWfKnFT3E58f0gKto7BR13clBFVrVZ0G0rbLZ1hUpSkgQQOA==",
+      "requires": {
+        "@types/node": "*",
+        "@types/range-parser": "*"
+      }
+    },
+    "@types/form-data": {
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+      "resolved": "https://registry.npmjs.org/@types/form-data/-/form-data-2.2.1.tgz",
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+    "sqlite3": {
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/sqlite3/-/sqlite3-4.0.6.tgz",
+      "integrity": "sha512-EqBXxHdKiwvNMRCgml86VTL5TK1i0IKiumnfxykX0gh6H6jaKijAXvE9O1N7+omfNSawR2fOmIyJZcfe8HYWpw==",
+      "requires": {
+        "nan": "~2.10.0",
+        "node-pre-gyp": "^0.11.0",
+        "request": "^2.87.0"
+      },
+      "dependencies": {
+        "nan": {
+          "version": "2.10.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.10.0.tgz",
+          "integrity": "sha512-bAdJv7fBLhWC+/Bls0Oza+mvTaNQtP+1RyhhhvD95pgUJz6XM5IzgmxOkItJ9tkoCiplvAnXI1tNmmUD/eScyA=="
+        }
+      }
+    },
    "sshpk": {
-      "version": "1.16.0",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.0.tgz",
-      "integrity": "sha512-Zhev35/y7hRMcID/upReIvRse+I9SVhyVre/KTJSJQWMz3C3+G+HpO7m1wK/yckEtujKZ7dS4hkVxAnmHaIGVQ==",
+      "version": "1.16.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
+      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
      "requires": {
        "asn1": "~0.2.3",
        "assert-plus": "^1.0.0",
@ -1346,6 +1976,11 @@
        "tweetnacl": "~0.14.0"
      }
    },
+    "statuses": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
+      "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
+    },
    "stdout-stream": {
      "version": "1.4.1",
      "resolved": "https://registry.npmjs.org/stdout-stream/-/stdout-stream-1.4.1.tgz",
@ -1396,6 +2031,11 @@
        "get-stdin": "^4.0.1"
      }
    },
+    "strip-json-comments": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+      "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
+    },
    "supports-color": {
      "version": "2.0.0",
      "resolved": "http://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@ -1453,6 +2093,15 @@
      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
    },
+    "type-is": {
+      "version": "1.6.16",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
+      "integrity": "sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.18"
+      }
+    },
    "typescript": {
      "version": "3.2.2",
      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.2.2.tgz",
@ -1480,6 +2129,11 @@
        }
      }
    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+    },
    "uri-js": {
      "version": "4.2.2",
      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
@ -1499,6 +2153,11 @@
      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
    "uuid": {
      "version": "3.3.2",
      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
@ -1513,6 +2172,11 @@
        "spdx-expression-parse": "^3.0.0"
      }
    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
    "verror": {
      "version": "1.10.0",
      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
--- a/package.json
+++ b/package.json
@ -10,11 +10,22 @@
 	},
 	"dependencies": {
 		"@sindresorhus/slugify": "^0.6.0",
+		"@types/body-parser": "^1.17.0",
+		"@types/express": "^4.16.1",
+		"@types/morgan": "^1.7.35",
+		"@types/request": "^2.48.1",
+		"@types/sqlite3": "^3.1.4",
+		"@types/uuid": "^3.4.4",
+		"body-parser": "^1.18.3",
 		"date-fns": "^1.30.1",
 		"ejs": "^2.6.1",
+		"express": "^4.16.4",
 		"highlight.js": "^9.13.1",
 		"markdown-it": "^8.4.2",
+		"morgan": "^1.9.1",
 		"node-sass": "^4.11.0",
+		"request": "^2.88.0",
+		"sqlite3": "^4.0.6",
 		"typescript": "^3.2.2",
 		"uuid": "^3.3.2"
 	},