Split each part into its own app

1 files changed, 59 insertions, 158 deletions

diff --git a/ttun_server/websockets.py b/ttun_server/websockets.py
index e828b8d..ea9ae94 100644
--- a/ttun_server/websockets.py
+++ b/ttun_server/websockets.py
@@ -1,189 +1,90 @@
 import asyncio
-import json
 import logging
 import os
-import typing
-from asyncio import create_task
-from base64 import b64encode, b64decode
-from contextlib import asynccontextmanager
-from typing import Optional
 from uuid import uuid4
 
-from starlette.endpoints import WebSocketEndpoint
-from starlette.types import Scope, Receive, Send
-from starlette.websockets import WebSocket
+from fastapi import WebSocket, WebSocketDisconnect
 
 import ttun_server
 from ttun_server.proxy_queue import ProxyQueue
-from ttun_server.types import Config, Message, WebsocketMessageType, \
-    WebsocketConnectData, WebsocketMessage, WebsocketMessageData, WebsocketDisconnectData, MessageType
+from ttun_server.types import (
+    Config,
+    Message,
+    MessageType,
+)
 
 logger = logging.getLogger(__name__)
 logger.setLevel('DEBUG')
 
-class WebsocketProxy(WebSocketEndpoint):
-    encoding = 'json'
-    websocket_listen_task = None
+async def assert_compatible_version(websocket: WebSocket, config: Config) -> None:
+    client_version = config.get('version', '1.0.0')
+    logger.debug('client_version %s', client_version)
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.id = str(uuid4())
+    if 'git' not in client_version and ttun_server.__version__ != 'development':
+        [client_major, *_] = [int(i) for i in client_version.split('.')[:3]]
+        [server_major, *_] = [int(i) for i in ttun_server.__version__.split('.')]
 
-    @asynccontextmanager
-    async def proxy(self, websocket: WebSocket, message: WebsocketMessage):
-        [subdomain, *_] = websocket.url.hostname.split('.')
+        if client_major < server_major:
+            await websocket.close(4000, 'Your client is too old')
 
-        expect_ack = WebsocketMessageType(message['type']) == WebsocketMessageType.connect
+        if client_major > server_major:
+            await websocket.close(4001, 'Your client is too new')
 
-        try:
-            request_queue = await ProxyQueue.get_for_identifier(subdomain)
-            await request_queue.enqueue(message)
 
-            if expect_ack:
-                response_queue = await ProxyQueue.create_for_identifier(message["identifier"])
-                yield await response_queue.dequeue()
-                await response_queue.delete()
-            else:
-                yield
-        except AssertionError:
-            yield None
+async def tunnel(websocket: WebSocket) -> None:
+    request_tasks: dict[str, asyncio.Task] = {}
+    proxy_queues: dict[str, ProxyQueue] = {}
 
-    async def listen_for_messages(self, websocket: WebSocket):
-        response_queue = await ProxyQueue.create_for_identifier(self.id)
+    await websocket.accept()
+    config: Config = await websocket.receive_json()
 
-        while True:
-            message: WebsocketMessage = await response_queue.dequeue()
-            logger.debug(message)
-            await websocket.send_text(b64decode(message['payload']['body'].encode()).decode())
-
-    async def on_connect(self, websocket: WebSocket) -> None:
-        message = WebsocketMessage(
-            type=WebsocketMessageType.connect.value,
-            identifier=self.id,
-            payload=WebsocketConnectData(
-                path=websocket.path_params['path'],
-                headers=[
-                    (k.decode(), v.decode())
-                    for k, v
-                    in websocket.scope['headers']
-                ],
-            )
-        )
+    await assert_compatible_version(websocket, config)
 
-        async with self.proxy(websocket, message) as m:
-            if m is not None and WebsocketMessageType(m['type']) == WebsocketMessageType.ack:
-                await super().on_connect(websocket)
+    if 'subdomains' not in config:
+        config['subdomains'] = [config['subdomain']]
+    elif config['subdomains'] is None:
+        config['subdomains'] = [None]
 
-        self.websocket_listen_task = asyncio.create_task(self.listen_for_messages(websocket))
+    for i, subdomain in enumerate(config['subdomains']):
+        if subdomain is None or await ProxyQueue.has_connection(subdomain):
+            config['subdomains'][i] = uuid4().hex
 
-        def callback(*args, **kwargs):
-            self.websocket_listen_task = None
+    for subdomain in config['subdomains']:
+        proxy_queues[subdomain] = await ProxyQueue.create_for_identifier(subdomain)
 
-        self.websocket_listen_task.add_done_callback(callback)
+    hostname = os.environ.get('TUNNEL_DOMAIN')
+    protocol = 'https' if os.environ.get('SECURE', False) else 'http'
 
-    async def on_receive(self, websocket: WebSocket, data: typing.Any) -> None:
-        match data:
-            case dict():
-                data_bytes = json.dumps(data).encode()
-            case bytes():
-                data_bytes = data
-            case _:
-                data_bytes = data.encode()
+    urls = [
+        f'{protocol}://{subdomain}.{hostname}'
+        for subdomain in config['subdomains']
+    ]
 
-        message = WebsocketMessage(
-            type=WebsocketMessageType.message.value,
-            identifier=self.id,
-            payload=WebsocketMessageData(
-                body=b64encode(data_bytes).decode(),
-            )
-        )
+    await websocket.send_json({
+        'url': urls[0],
+        'urls': urls,
+    })
 
-        async with self.proxy(websocket, message):
-            pass
+    async def handle_requests(subdomain: str) -> None:
+        while request := await proxy_queues[subdomain].dequeue():
+            asyncio.create_task(websocket.send_json(request), name=request['identifier'])
 
-    async def on_disconnect(self, websocket: WebSocket, close_code: int) -> None:
-        message = WebsocketMessage(
-            type=WebsocketMessageType.disconnect.value,
-            identifier=self.id,
-            payload=WebsocketDisconnectData(
-                close_code=close_code,
-            )
+    for subdomain in config['subdomains']:
+        request_tasks[subdomain] = asyncio.create_task(
+            handle_requests(subdomain), name=subdomain
         )
 
-        async with self.proxy(websocket, message):
-            if self.websocket_listen_task is not None:
-                self.websocket_listen_task.cancel()
-
-class Tunnel(WebSocketEndpoint):
-    encoding = 'json'
-
-    def __init__(self, scope: Scope, receive: Receive, send: Send):
-        super().__init__(scope, receive, send)
-        self.request_tasks: dict[str, asyncio.Task] = {}
-        self.config: Optional[Config] = None
-        self.proxy_queues: dict[str, ProxyQueue] = {}
-
-    async def handle_requests(self, websocket: WebSocket, subdomain: str):
-        while request := await self.proxy_queues[subdomain].dequeue():
-            task = asyncio.create_task(websocket.send_json(request), name=request['identifier'])
-
-
-    async def on_connect(self, websocket: WebSocket) -> None:
-        await websocket.accept()
-        self.config = await websocket.receive_json()
-
-        client_version = self.config.get('version', '1.0.0')
-        logger.debug('client_version %s', client_version)
-
-        if 'git' not in client_version and ttun_server.__version__ != 'development':
-            [client_major, *_] = [int(i) for i in client_version.split('.')[:3]]
-            [server_major, *_] = [int(i) for i in ttun_server.__version__.split('.')]
-
-            if client_major < server_major:
-                await websocket.close(4000, 'Your client is too old')
-
-            if client_major > server_major:
-                await websocket.close(4001, 'Your client is too new')
-
-        if 'subdomains' not in self.config:
-            self.config['subdomains'] = [self.config['subdomain']]
-        elif self.config['subdomains'] is None:
-            self.config['subdomains'] = [None]
-
-        for i, subdomain in enumerate(self.config['subdomains']):
-            if subdomain is None or await ProxyQueue.has_connection(subdomain):
-                self.config['subdomains'][i] = uuid4().hex
-
-        for subdomain in self.config['subdomains']:
+    try:
+        while True:
+            data: Message = await websocket.receive_json()
+            try:
+                data['type'] = MessageType(data['type']).value
+                response_queue = await ProxyQueue.get_for_identifier(data['identifier'])
+                await response_queue.enqueue(data)
+            except AssertionError:
+                pass
+    except WebSocketDisconnect:
+        for proxy_queue in proxy_queues.values():