add nginx cache invalidation

bundle nginx in docker image switch from ndk to nostr-tools
2025-06-23 12:05:01 +00:00 · 2024-09-26 12:48:13 -05:00 · 2024-09-26 12:48:13 -05:00 · b7b43cff10
commit b7b43cff10
parent 88a9229633
20 changed files with 238 additions and 218 deletions
--- a/.changeset/many-lemons-exercise.md
+++ b/.changeset/many-lemons-exercise.md
@ -0,0 +1,5 @@
+---
+"nsite-ts": minor
+---
+
+Bundle nginx in docker image
--- a/.changeset/metal-wasps-cry.md
+++ b/.changeset/metal-wasps-cry.md
@ -0,0 +1,5 @@
+---
+"nsite-ts": minor
+---
+
+Add NGINX_CACHE_DIR for invalidating nginx cache
--- a/.changeset/popular-plants-beam.md
+++ b/.changeset/popular-plants-beam.md
@ -0,0 +1,5 @@
+---
+"nsite-ts": minor
+---
+
+Add SUBSCRIPTION_RELAYS for listening for new events
--- a/.env.example
+++ b/.env.example
@ -2,8 +2,11 @@
 # can be in-memory, redis:// or sqlite://
 CACHE_PATH="in-memory"

-# A list of nostr relays to search
-NOSTR_RELAYS=wss://nos.lol,wss://relay.damus.io
+# A list of relays to find users relay lists (10002) and blossom servers (10063)
+LOOKUP_RELAYS=wss://user.kindpag.es,wss://purplepag.es
+
+# A list of nostr relays to listen to for new nsite events
+SUBSCRIPTION_RELAYS=wss://nos.lol,wss://relay.damus.io

 # A list of fallback blossom servers
 BLOSSOM_SERVERS=https://cdn.satellite.earth
@ -12,4 +15,4 @@ BLOSSOM_SERVERS=https://cdn.satellite.earth
 MAX_FILE_SIZE='2 MB'

 # the hostname or ip of the upstream nginx proxy cache
-NGINX_HOST='nginx'
+NGINX_CACHE_DIR='/var/nginx/cache'
--- a/26
+++ b/26
@ -5,6 +5,9 @@ ENV PNPM_HOME="/pnpm"
 ENV PATH="$PNPM_HOME:$PATH"
 RUN corepack enable

+RUN apk update && apk add --no-cache nginx supervisor
+COPY supervisord.conf /etc/supervisord.conf
+
 WORKDIR /app
 COPY package.json .
 COPY pnpm-lock.yaml .
@ -19,12 +22,29 @@ COPY src ./src
 RUN pnpm build

 FROM base AS main
+
+# Setup user
+RUN addgroup -S nsite && adduser -S nsite -G nsite
+RUN chown -R nsite:nsite /app
+
+# Setup nginx
+COPY nginx/nginx.conf /etc/nginx/nginx.conf
+COPY nginx/default.conf /etc/nginx/conf.d/default.conf
+
+# setup nsite
 COPY --from=prod-deps /app/node_modules /app/node_modules
 COPY --from=build ./app/build ./build

 COPY ./public ./public

-EXPOSE 80
-ENV PORT="80"
+VOLUME [ "/var/cache/nginx" ]

-ENTRYPOINT [ "node", "." ]
+EXPOSE 80 3000
+ENV NSITE_PORT="3000"
+ENV NGINX_CACHE_DIR="/var/cache/nginx"
+
+COPY docker-entrypoint.sh /
+RUN chmod +x /docker-entrypoint.sh
+ENTRYPOINT ["/docker-entrypoint.sh"]
+
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]
--- a/docker-compose.yml
+++ b/docker-compose.yml
@ -1,22 +1,17 @@
 version: "3.7"

-volumes:
-  cache: {}
-
 services:
-  nginx:
-    image: nginx:alpine
-    ports:
-      - 8080:80
-    volumes:
-      - cache:/var/cache/nginx
-      - ./nginx/nginx.conf:/etc/nginx/nginx.conf
-      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf
-
  nsite:
    build: .
    image: ghcr.io/hzrd149/nsite-ts:master
    environment:
      LOOKUP_RELAYS: wss://user.kindpag.es,wss://purplepag.es
+      SUBSCRIPTION_RELAYS: wss://nostrue.com/,wss://nos.lol/,wss://relay.damus.io/,wss://purplerelay.com/
+    volumes:
+      - type: tmpfs
+        target: /var/cache/nginx
+        tmpfs:
+          size: 100M
    ports:
-      - 3000:80
+      - 8080:80
+      - 3000:3000
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@ -0,0 +1,5 @@
+#!/bin/sh
+
+chown -R nginx:nginx /var/cache/nginx
+
+exec "$@"
--- a/nginx/default.conf
+++ b/nginx/default.conf
@ -1,7 +1,7 @@
 server {
 	listen 80;
 	listen [::]:80;
-	server_name nsite-proxy;
+	server_name nsite;

 	location / {
 		proxy_cache request_cache;
@ -17,13 +17,6 @@ server {
 		add_header Cache-Control "public, no-transform";

 		proxy_set_header Host $host;
-		proxy_pass http://nsite;
+		proxy_pass http://127.0.0.1:3000;
 	}
-
-	# Manual cache invalidation ( cant use proxy_cache_purge )
-	# location ~ /purge(/.*) {
-	# 	allow 127.0.0.1;
-	# 	deny all;
-	# 	proxy_cache_purge request_cache $scheme$proxy_host$1;
-	# }
 }
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@ -1,7 +1,7 @@
 user  nginx;
 worker_processes  auto;

-error_log  /var/log/nginx/error.log notice;
+error_log  /dev/stderr notice;
 pid        /var/run/nginx.pid;

 events {
@ -19,7 +19,7 @@ http {
 										'$status $body_bytes_sent "$http_referer" '
 										'"$http_user_agent" "$http_x_forwarded_for"';

-	access_log  /var/log/nginx/access.log  main;
+	access_log  /dev/stdout  main;

 	sendfile        on;
 	#tcp_nopush     on;
--- a/package.json
+++ b/package.json
@ -21,7 +21,6 @@
    "@keyv/redis": "^3.0.1",
    "@keyv/sqlite": "^4.0.1",
    "@koa/cors": "^5.0.0",
-    "@nostr-dev-kit/ndk": "^2.10.0",
    "blossom-client-sdk": "^1.1.1",
    "dotenv": "^16.4.5",
    "follow-redirects": "^1.15.6",
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@ -20,9 +20,6 @@ importers:
      '@koa/cors':
        specifier: ^5.0.0
        version: 5.0.0
-      '@nostr-dev-kit/ndk':
-        specifier: ^2.10.0
-        version: 2.10.0(typescript@5.6.2)
      blossom-client-sdk:
        specifier: ^1.1.1
        version: 1.1.1
@ -215,10 +212,6 @@ packages:
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-    engines: {node: ^14.21.3 || >=16}
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    engines: {node: ^14.21.3 || >=16}

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-
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-    engines: {node: '>=16'}
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-
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    peerDependencies:
@ -794,10 +773,6 @@ packages:
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@ -818,10 +793,6 @@ packages:
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        optional: true

-  formdata-polyfill@4.0.10:
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-    engines: {node: '>=12.20.0'}
-
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@ -1046,9 +1017,6 @@ packages:
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    engines: {node: ^4.8.4 || ^6.10.1 || ^7.10.1 || >= 8.1.4}

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-
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@ -1176,14 +1144,6 @@ packages:
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-    engines: {node: '>=10.5.0'}
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-  node-fetch@3.3.2:
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-    engines: {node: ^12.20.0 || ^14.13.1 || >=16.0.0}
-
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    hasBin: true

-  tseep@1.2.2:
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-
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-
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-  web-streams-polyfill@3.3.3:
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@ -1867,18 +1813,12 @@ snapshots:
    dependencies:
      '@noble/hashes': 1.3.2

-  '@noble/curves@1.6.0':
-    dependencies:
-      '@noble/hashes': 1.5.0
-
  '@noble/hashes@1.3.1': {}

  '@noble/hashes@1.3.2': {}

  '@noble/hashes@1.5.0': {}

-  '@noble/secp256k1@2.1.0': {}
-
  '@nodelib/fs.scandir@2.1.5':
    dependencies:
      '@nodelib/fs.stat': 2.0.5
@ -1891,26 +1831,6 @@ snapshots:
      '@nodelib/fs.scandir': 2.1.5
      fastq: 1.17.1

-  '@nostr-dev-kit/ndk@2.10.0(typescript@5.6.2)':
-    dependencies:
-      '@noble/curves': 1.6.0
-      '@noble/hashes': 1.5.0
-      '@noble/secp256k1': 2.1.0
-      '@scure/base': 1.1.9
-      debug: 4.3.7(supports-color@5.5.0)
-      light-bolt11-decoder: 3.1.1
-      node-fetch: 3.3.2
-      nostr-tools: 2.7.2(typescript@5.6.2)
-      tseep: 1.2.2
-      typescript-lru-cache: 2.0.0
-      utf8-buffer: 1.0.0
-      websocket-polyfill: 1.0.0
-    transitivePeerDependencies:
-      - bufferutil
-      - supports-color
-      - typescript
-      - utf-8-validate
-
  '@npmcli/fs@1.1.1':
    dependencies:
      '@gar/promisify': 1.1.3
@ -1960,8 +1880,6 @@ snapshots:

  '@scure/base@1.1.1': {}

-  '@scure/base@1.1.9': {}
-
  '@scure/bip32@1.3.1':
    dependencies:
      '@noble/curves': 1.1.0
@ -2360,8 +2278,6 @@ snapshots:
      shebang-command: 1.2.0
      which: 1.3.1

-  data-uri-to-buffer@4.0.1: {}
-
  debug@2.6.9:
    dependencies:
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@ -2457,11 +2373,6 @@ snapshots:
    dependencies:
      reusify: 1.0.4

-  fetch-blob@3.2.0:
-    dependencies:
-      node-domexception: 1.0.0
-      web-streams-polyfill: 3.3.3
-
  file-uri-to-path@1.0.0: {}

  fill-range@7.1.1:
@ -2475,10 +2386,6 @@ snapshots:

  follow-redirects@1.15.9: {}

-  formdata-polyfill@4.0.10:
-    dependencies:
-      fetch-blob: 3.2.0
-
  fresh@0.5.2: {}

  fs-constants@1.0.0: {}
@ -2766,10 +2673,6 @@ snapshots:
    transitivePeerDependencies:
      - supports-color

-  light-bolt11-decoder@3.1.1:
-    dependencies:
-      '@scure/base': 1.1.1
-
  locate-path@5.0.0:
    dependencies:
      p-locate: 4.1.0
@ -2908,14 +2811,6 @@ snapshots:

  node-addon-api@7.1.1: {}

-  node-domexception@1.0.0: {}
-
-  node-fetch@3.3.2:
-    dependencies:
-      data-uri-to-buffer: 4.0.1
-      fetch-blob: 3.2.0
-      formdata-polyfill: 4.0.10
-
  node-gyp@8.4.1:
    dependencies:
      env-paths: 2.2.1
@ -3295,8 +3190,6 @@ snapshots:

  touch@3.1.1: {}

-  tseep@1.2.2: {}
-
  tslib@2.7.0: {}

  tsscmp@1.0.6: {}
@ -3312,8 +3205,6 @@ snapshots:
      media-typer: 0.3.0
      mime-types: 2.1.35

-  typescript-lru-cache@2.0.0: {}
-
  typescript@5.6.2: {}

  undefsafe@2.0.5: {}
@ -3332,14 +3223,10 @@ snapshots:

  universalify@0.1.2: {}

-  utf8-buffer@1.0.0: {}
-
  util-deprecate@1.0.2: {}

  vary@1.1.2: {}

-  web-streams-polyfill@3.3.3: {}
-
  websocket-polyfill@1.0.0:
    dependencies:
      import2: 1.0.3
--- a/src/blossom.ts
+++ b/src/blossom.ts
@ -1,16 +1,11 @@
 import { getServersFromServerListEvent, USER_BLOSSOM_SERVER_LIST_KIND } from "blossom-client-sdk";
-import { NDKRelaySet } from "@nostr-dev-kit/ndk";

-import ndk from "./ndk.js";
 import { BLOSSOM_SERVERS, MAX_FILE_SIZE } from "./env.js";
 import { makeRequestWithAbort } from "./helpers/http.js";
+import pool from "./nostr.js";

-export async function getUserBlossomServers(pubkey: string, relays?: string[]) {
-  const blossomServersEvent = await ndk.fetchEvent(
-    [{ kinds: [USER_BLOSSOM_SERVER_LIST_KIND], authors: [pubkey] }],
-    {},
-    relays ? NDKRelaySet.fromRelayUrls(relays, ndk, true) : undefined,
-  );
+export async function getUserBlossomServers(pubkey: string, relays: string[]) {
+  const blossomServersEvent = await pool.get(relays, { kinds: [USER_BLOSSOM_SERVER_LIST_KIND], authors: [pubkey] });

  return blossomServersEvent ? getServersFromServerListEvent(blossomServersEvent).map((u) => u.toString()) : undefined;
 }
--- a/src/cache.ts
+++ b/src/cache.ts
@ -26,6 +26,14 @@ store?.on("error", (err) => {

 const opts = store ? { store } : {};

+/** domain -> pubkey */
+export const userDomains = new Keyv({
+  ...opts,
+  namespace: "domains",
+  // cache domains for an hour
+  ttl: 60 * 60 * 1000,
+});
+
 /** pubkey -> blossom servers */
 export const userServers = new Keyv({
  ...opts,
--- a/src/env.ts
+++ b/src/env.ts
@ -1,13 +1,16 @@
 import "dotenv/config";
 import xbytes from "xbytes";

-const LOOKUP_RELAYS = process.env.LOOKUP_RELAYS?.split(",") ?? ["wss://user.kindpag.es/", "wss://purplepag.es/"];
-const NOSTR_RELAYS = process.env.NOSTR_RELAYS?.split(",") ?? [];
-const BLOSSOM_SERVERS = process.env.BLOSSOM_SERVERS?.split(",") ?? [];
+const LOOKUP_RELAYS = process.env.LOOKUP_RELAYS?.split(",").map((u) => u.trim()) ?? [
+  "wss://user.kindpag.es/",
+  "wss://purplepag.es/",
+];
+const SUBSCRIPTION_RELAYS = process.env.SUBSCRIPTION_RELAYS?.split(",").map((u) => u.trim()) ?? [];
+const BLOSSOM_SERVERS = process.env.BLOSSOM_SERVERS?.split(",").map((u) => u.trim()) ?? [];

 const MAX_FILE_SIZE = process.env.MAX_FILE_SIZE ? xbytes.parseSize(process.env.MAX_FILE_SIZE) : Infinity;

-const NGINX_HOST = process.env.NGINX_HOST;
+const NGINX_CACHE_DIR = process.env.NGINX_CACHE_DIR;
 const CACHE_PATH = process.env.CACHE_PATH;

-export { NOSTR_RELAYS, LOOKUP_RELAYS, BLOSSOM_SERVERS, MAX_FILE_SIZE, NGINX_HOST, CACHE_PATH };
+export { SUBSCRIPTION_RELAYS, LOOKUP_RELAYS, BLOSSOM_SERVERS, MAX_FILE_SIZE, NGINX_CACHE_DIR, CACHE_PATH };
--- a/src/events.ts
+++ b/src/events.ts
@ -1,7 +1,6 @@
 import { extname, isAbsolute, join } from "path";
 import { NSITE_KIND } from "./const.js";
-import ndk from "./ndk.js";
-import { NDKRelaySet } from "@nostr-dev-kit/ndk";
+import { requestEvents } from "./nostr.js";

 export function getSearchPaths(path: string) {
  const paths = [path];
@ -9,11 +8,6 @@ export function getSearchPaths(path: string) {
  // if the path does not have an extension, also look for index.html
  if (extname(path) === "") paths.push(join(path, "index.html"));

-  // also look for relative paths
-  for (const p of Array.from(paths)) {
-    if (isAbsolute(p)) paths.push(p.replace(/^\//, ""));
-  }
-
  return paths.filter((p) => !!p);
 }

@ -29,13 +23,10 @@ export function parseNsiteEvent(event: { pubkey: string; tags: string[][] }) {
    };
 }

-export async function getNsiteBlobs(pubkey: string, path: string, relays?: string[]) {
-  const paths = getSearchPaths(path);
-  const events = await ndk.fetchEvents(
-    { kinds: [NSITE_KIND], "#d": paths, authors: [pubkey] },
-    {},
-    relays && NDKRelaySet.fromRelayUrls(relays, ndk, true),
-  );
+export async function getNsiteBlobs(pubkey: string, path: string, relays: string[]) {
+  // NOTE: hack, remove "/" paths since it breaks some relays
+  const paths = getSearchPaths(path).filter((p) => p !== "/");
+  const events = await requestEvents(relays, { kinds: [NSITE_KIND], "#d": paths, authors: [pubkey] });

  return Array.from(events)
    .map(parseNsiteEvent)
--- a/src/index.ts
+++ b/src/index.ts
@ -10,11 +10,13 @@ import mime from "mime";
 import morgan from "koa-morgan";

 import { resolveNpubFromHostname } from "./helpers/dns.js";
-import { getNsiteBlobs } from "./events.js";
+import { getNsiteBlobs, parseNsiteEvent } from "./events.js";
 import { downloadFile, getUserBlossomServers } from "./blossom.js";
-import { BLOSSOM_SERVERS } from "./env.js";
-import { userRelays, userServers } from "./cache.js";
-import { getUserOutboxes } from "./ndk.js";
+import { BLOSSOM_SERVERS, NGINX_CACHE_DIR, SUBSCRIPTION_RELAYS } from "./env.js";
+import { userDomains, userRelays, userServers } from "./cache.js";
+import { NSITE_KIND } from "./const.js";
+import { invalidatePubkeyPath } from "./nginx.js";
+import pool, { getUserOutboxes, subscribeForEvents } from "./nostr.js";

 const __dirname = path.dirname(fileURLToPath(import.meta.url));

@ -45,12 +47,29 @@ app.use(async (ctx, next) => {
  }
 });

-// map pubkeys to folders in sites dir
+// handle nsite requests
 app.use(async (ctx, next) => {
-  const pubkey = (ctx.state.pubkey = await resolveNpubFromHostname(ctx.hostname));
+  let pubkey = await userDomains.get<string | undefined>(ctx.hostname);
+
+  // resolve pubkey if not in cache
+  if (!pubkey) {
+    console.log(`${ctx.hostname}: Resolving`);
+    pubkey = await resolveNpubFromHostname(ctx.hostname);

    if (pubkey) {
+      await userDomains.set(ctx.hostname, pubkey);
+      console.log(`${ctx.hostname}: Found ${pubkey}`);
+    } else {
+      await userDomains.set(ctx.hostname, "");
+    }
+  }
+
+  if (pubkey) {
+    ctx.state.pubkey = pubkey;
+
    let relays = await userRelays.get<string[] | undefined>(pubkey);
+
+    // fetch relays if not in cache
    if (!relays) {
      console.log(`${pubkey}: Fetching relays`);

@ -69,12 +88,15 @@ app.use(async (ctx, next) => {
    const blobs = await getNsiteBlobs(pubkey, ctx.path, relays);

    if (blobs.length === 0) {
+      console.log(`${pubkey}: Found 0 events`);
      ctx.status = 404;
      ctx.body = "Not Found";
      return;
    }

    let servers = await userServers.get<string[] | undefined>(pubkey);
+
+    // fetch blossom servers if not in cache
    if (!servers) {
      console.log(`${pubkey}: Searching for blossom servers`);
      servers = await getUserBlossomServers(pubkey, relays);
@ -88,6 +110,8 @@ app.use(async (ctx, next) => {
        console.log(`${pubkey}: Failed to find servers`);
      }
    }
+
+    // always fetch from additional servers
    servers.push(...BLOSSOM_SERVERS);

    for (const blob of blobs) {
@ -121,12 +145,40 @@ try {
  app.use(serve(www));
 }

-app.listen(process.env.PORT || 3000, () => {
+app.listen(
+  {
+    port: process.env.NSITE_PORT || 3000,
+    host: process.env.NSITE_HOST || "0.0.0.0",
+  },
+  () => {
    console.log("Started on port", process.env.PORT || 3000);
+  },
+);
+
+// invalidate nginx cache on new events
+if (NGINX_CACHE_DIR && SUBSCRIPTION_RELAYS.length > 0) {
+  console.log(`Listening for new nsite events`);
+
+  subscribeForEvents(SUBSCRIPTION_RELAYS, async (event) => {
+    try {
+      const nsite = parseNsiteEvent(event);
+      if (nsite) {
+        console.log(`${nsite.pubkey}: Invalidating ${nsite.path}`);
+        await invalidatePubkeyPath(nsite.pubkey, nsite.path);
+      }
+    } catch (error) {
+      console.log(`Failed to invalidate ${event.id}`);
+    }
+  });
+}
+
+process.on("unhandledRejection", (reason, promise) => {
+  console.error("Unhandled Rejection at:", promise, "reason:", reason);
 });

 async function shutdown() {
  console.log("Shutting down...");
+  pool.destroy();
  process.exit(0);
 }

--- a/src/ndk.ts
+++ b/src/ndk.ts
@ -1,17 +0,0 @@
-import NDK from "@nostr-dev-kit/ndk";
-import { LOOKUP_RELAYS, NOSTR_RELAYS } from "./env.js";
-
-const ndk = new NDK({
-  explicitRelayUrls: [...LOOKUP_RELAYS, ...NOSTR_RELAYS],
-});
-
-ndk.connect();
-
-export async function getUserOutboxes(pubkey: string) {
-  const mailboxes = await ndk.fetchEvent({ kinds: [10002], authors: [pubkey] });
-  if (!mailboxes) return;
-
-  return mailboxes.tags.filter((t) => t[0] === "r" && (t[2] === undefined || t[2] === "write")).map((t) => t[1]);
-}
-
-export default ndk;
--- a/src/nginx.ts
+++ b/src/nginx.ts
@ -1,26 +1,37 @@
-import http from "node:http";
-import { NGINX_HOST } from "./env.js";
+import pfs from "node:fs/promises";
+import crypto from "node:crypto";
+import { join } from "node:path";

-export function invalidateCache(host: string, path: string) {
-  if (!NGINX_HOST) return Promise.resolve(false);
+import { NGINX_CACHE_DIR } from "./env.js";
+import { userDomains } from "./cache.js";

-  return new Promise<boolean>((resolve, reject) => {
-    const req = http.request(
-      {
-        hostname: NGINX_HOST,
-        method: "GET",
-        port: 80,
-        path,
-        headers: {
-          Host: host,
-        },
-      },
-      (res) => {
-        if (res.statusCode && res.statusCode >= 200 && res.statusCode < 300) resolve(true);
-        else reject(new Error("Failed to invalidate"));
-      },
-    );
+export async function invalidatePubkeyPath(pubkey: string, path: string) {
+  const iterator = userDomains.iterator?.(undefined);
+  if (!iterator) return;

-    req.end();
-  });
+  const promises: Promise<boolean | undefined>[] = [];
+  for await (const [domain, key] of iterator) {
+    if (key === pubkey) {
+      promises.push(invalidateNginxCache(domain, path));
+    }
+  }
+
+  await Promise.allSettled(promises);
+}
+
+export async function invalidateNginxCache(host: string, path: string) {
+  if (!NGINX_CACHE_DIR) return Promise.resolve(false);
+
+  try {
+    const key = `${host}${path}`;
+    const md5 = crypto.createHash("md5").update(key).digest("hex");
+
+    // NOTE: hard coded to cache levels 1:2
+    const cachePath = join(NGINX_CACHE_DIR, md5.slice(-1), md5.slice(-3, -1), md5);
+    await pfs.rm(cachePath);
+
+    console.log(`Invalidated ${key} (${md5})`);
+  } catch (error) {
+    // ignore errors
+  }
 }
--- a/src/nostr.ts
+++ b/src/nostr.ts
@ -0,0 +1,38 @@
+import { Filter, NostrEvent, SimplePool } from "nostr-tools";
+import { LOOKUP_RELAYS } from "./env.js";
+import { NSITE_KIND } from "./const.js";
+
+const pool = new SimplePool();
+
+export async function getUserOutboxes(pubkey: string) {
+  const mailboxes = await pool.get(LOOKUP_RELAYS, { kinds: [10002], authors: [pubkey] });
+  if (!mailboxes) return;
+
+  return mailboxes.tags.filter((t) => t[0] === "r" && (t[2] === undefined || t[2] === "write")).map((t) => t[1]);
+}
+
+export function subscribeForEvents(relays: string[], onevent: (event: NostrEvent) => any) {
+  return pool.subscribeMany(relays, [{ kinds: [NSITE_KIND], since: Math.round(Date.now() / 1000) - 60 * 60 }], {
+    onevent,
+  });
+}
+
+export function requestEvents(relays: string[], filter: Filter) {
+  return new Promise<NostrEvent[]>(async (res, rej) => {
+    const events: NostrEvent[] = [];
+
+    await Promise.allSettled(relays.map((url) => pool.ensureRelay(url).catch((e) => {})));
+
+    const sub = pool.subscribeMany(relays, [filter], {
+      onevent: (e) => events.push(e),
+      oneose: () => sub.close(),
+      onclose: (reasons) => {
+        const errs = reasons.filter((r) => r !== "closed by caller");
+        if (errs.length > 0 && events.length === 0) rej(new Error(errs.join(", ")));
+        else res(events);
+      },
+    });
+  });
+}
+
+export default pool;
--- a/supervisord.conf
+++ b/supervisord.conf
@ -0,0 +1,22 @@
+[supervisord]
+nodaemon=true
+user=root
+
+[program:nginx]
+command=nginx -g "daemon off;"
+autostart=true
+autorestart=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+
+[program:nsite]
+command=node /app
+autostart=true
+autorestart=true
+user=root
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0