support fingering the instance

fingerd.py

@@ -3,6 +3,7 @@
 import os
 import asyncio
 import asyncpg
+import aiohttp
 import qtoml as toml
 from contextvars import ContextVar
 
@@ -22,6 +23,12 @@ async def handle_finger(reader, writer):
 			+ len(config['instance_name'])
 		)
 		handle = data.decode().rstrip()
+
+		if not handle:
+			# `finger @instance.example`
+			await handle_finger_instance(reader, writer)
+			return
+
 		username = handle.removeprefix('@').removesuffix('@' + config['instance_name'])
 		if '@' in username:
 			writer.write(b'Error: user must be local to this instance\n')
@@ -42,14 +49,32 @@ async def handle_finger(reader, writer):
 		writer.close()
 		await writer.wait_closed()
 
+async def handle_finger_instance(reader, writer):
+	async with http.get(f'https://{config["instance_name"]}/nodeinfo/2.0') as resp:
+		data = (await resp.json())['usage']
+		user_data = data['users']
+		resp = (
+			f'Total users: {user_data["total"]:,}\n'
+			f'Active users (past month): {user_data["activeMonth"]:,}\n'
+			f'Active users (past six months): {user_data["activeHalfyear"]:,}\n'
+			f'Total posts: {data["localPosts"]:,}\n'
+		).encode()
+		writer.write(resp)
+
 async def main():
+	global http
+
 	db.set(await asyncpg.create_pool(**config['db']))
 
-	async with await asyncio.start_server(
-		handle_finger,
-		'0.0.0.0',
-		os.getenv('PORT', FINGER_PORT),
-	) as server:
+	async with (
+		# globals used here only because ContextVar wasn't working
+		aiohttp.ClientSession() as http,
+		await asyncio.start_server(
+			handle_finger,
+			'0.0.0.0',
+			os.getenv('PORT', FINGER_PORT),
+		) as server,
+	):
 		addrs = ', '.join(str(sock.getsockname()) for sock in server.sockets)
 		print(f'Serving on {addrs}')
 

requirements.txt

@@ -1,2 +1,3 @@
 asyncpg ~= 0.28.0
 qtoml ~= 0.3.1
+aiohttp ~= 3.8