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Diffstat (limited to 'decky_plugin_installer.py')
| -rw-r--r-- | decky_plugin_installer.py | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/decky_plugin_installer.py b/decky_plugin_installer.py new file mode 100644 index 0000000..7c70235 --- /dev/null +++ b/decky_plugin_installer.py @@ -0,0 +1,237 @@ +import argparse +import asyncio +import base64 +import json +import os +import struct +import sys +import urllib.request +from typing import Any, Dict, List, Optional + +# Decky Loader Message Types +CALL = 0 +REPLY = 1 +ERROR = -1 +EVENT = 3 + + +def log(*args: Any) -> None: + """Print formatted logs to stderr.""" + print("[DeckyInstaller]", *args, file=sys.stderr, flush=True) + + +class DeckyClient: + """ + A robust client for Decky Loader using asyncio streams. + """ + + def __init__(self, host: str = "127.0.0.1", port: int = 1337): + self.host = host + self.port = port + self.reader: Optional[asyncio.StreamReader] = None + self.writer: Optional[asyncio.StreamWriter] = None + self.msg_id = 0 + + async def get_token(self) -> str: + """Fetch the CSRF token via HTTP GET.""" + url = f"http://{self.host}:{self.port}/auth/token" + # Using a context manager for the request + with urllib.request.urlopen(url, timeout=5) as response: + return response.read().decode().strip() + + + async def connect(self, token: str) -> None: + """Connect and perform WebSocket handshake.""" + self.reader, self.writer = await asyncio.open_connection(self.host, self.port) + + # Build handshake + key = base64.b64encode(os.urandom(16)).decode() + handshake = ( + f"GET /ws?auth={token} HTTP/1.1\r\n" + f"Host: {self.host}:{self.port}\r\n" + "Upgrade: websocket\r\n" + "Connection: Upgrade\r\n" + f"Sec-WebSocket-Key: {key}\r\n" + "Sec-WebSocket-Version: 13\r\n\r\n" + ) + self.writer.write(handshake.encode()) + await self.writer.drain() + + # Read response headers (terminated by \r\n\r\n) + header_data = b"" + while b"\r\n\r\n" not in header_data: + chunk = await self.reader.read(1024) + if not chunk: + raise ConnectionError("Server closed connection during handshake") + header_data += chunk + + if b"101 Switching Protocols" not in header_data: + raise RuntimeError(f"Handshake failed: {header_data.decode(errors='ignore')}") + + # Note: Any data after \r\n\r\n is the start of the first WS frame + # asyncio.StreamReader handles the internal buffer automatically. + + async def send(self, msg_type: int, method: str, args: List[Any]) -> None: + """Send a masked WebSocket text frame.""" + self.msg_id += 1 + + message_dict = { + "type": msg_type, + "id": self.msg_id, + "route": method, + "args": args, + } + payload = json.dumps(message_dict).encode() + length = len(payload) + + # Header: FIN=1, Opcode=1 (Text) + frame = bytearray([0x81]) + + if length < 126: + frame.append(length | 0x80) + elif length < 65536: + frame.append(126 | 0x80) + frame.extend(struct.pack("!H", length)) + else: + frame.append(127 | 0x80) + frame.extend(struct.pack("!Q", length)) + + # Client must mask data + mask = os.urandom(4) + frame.extend(mask) + masked_payload = bytes(b ^ mask[i % 4] for i, b in enumerate(payload)) + frame.extend(masked_payload) + + self.writer.write(frame) + await self.writer.drain() + + async def recv(self) -> Optional[Dict[str, Any]]: + """Receive and parse one WebSocket text frame.""" + try: + # Read first 2 bytes: Opcode and Length + head = await self.reader.readexactly(2) + # opcode = head[0] & 0x0F + has_mask = head[1] & 0x80 + length = head[1] & 0x7F + + if length == 126: + ext_len = await self.reader.readexactly(2) + length = struct.unpack("!H", ext_len)[0] + elif length == 127: + ext_len = await self.reader.readexactly(8) + length = struct.unpack("!Q", ext_len)[0] + + if has_mask: + mask = await self.reader.readexactly(4) + + payload_raw = await self.reader.readexactly(length) + + if has_mask: + payload_raw = bytes(b ^ mask[i % 4] for i, b in enumerate(payload_raw)) + + return json.loads(payload_raw.decode()) + except (asyncio.IncompleteReadError, ConnectionError): + return None + + async def close(self) -> None: + """Send a WebSocket close frame and close the stream.""" + if not self.writer: + return + try: + # FIN=1, opcode=8 (Close), masked payload with status 1000 + payload = struct.pack("!H", 1000) + frame = bytearray([0x88, 0x80 | len(payload)]) + mask = os.urandom(4) + frame.extend(mask) + masked_payload = bytes(b ^ mask[i % 4] for i, b in enumerate(payload)) + frame.extend(masked_payload) + self.writer.write(frame) + await self.writer.drain() + except Exception: + pass + finally: + self.writer.close() + await self.writer.wait_closed() + + +async def run_installer(target_id: int, store_url: str) -> None: + """Installation workflow.""" + client = DeckyClient() + success = False + error: Optional[BaseException] = None + try: + log(f"Contacting Mock Server at {client.host}:{client.port}...") + token = await client.get_token() + await client.connect(token) + + log(f"Connection established. Fetching plugin metadata for ID: {target_id}") + with urllib.request.urlopen(store_url, timeout=10) as response: + store_raw = response.read().decode() + plugins = json.loads(store_raw) + target = next((p for p in plugins if int(p.get("id")) == int(target_id)), None) + if not target: + raise RuntimeError(f"plugin id {target_id} not found") + + plugin_name = target.get("name") or f"plugin-{target_id}" + versions = target.get("versions") or [] + if not versions: + raise RuntimeError("store entry missing versions") + + latest = sorted(versions, key=lambda v: (v.get("name") or ""))[-1] + version_name = latest.get("name") or "dev" + artifact_url = latest.get("artifact") or "" + hash_ = latest.get("hash") or "" + if not artifact_url: + raise RuntimeError("latest version missing artifact URL") + + log(f"Installing {plugin_name} v{version_name}") + await client.send(CALL, "utilities/install_plugin", + [artifact_url, plugin_name, version_name, hash_, 0]) + + while True: + msg = await client.recv() + if msg is None: + log("Connection closed by server.") + break + + m_type = msg.get("type") + + if m_type == EVENT and msg.get("event") == "loader/add_plugin_install_prompt": + m_args = msg.get("args", []) + if len(m_args) < 3: + log(f"Invalid install prompt args: {m_args}") + continue + request_id = m_args[2] + log("Prompt received, sending confirmation...") + await client.send(CALL, "utilities/confirm_plugin_install", + [request_id]) + + elif m_type == EVENT and msg.get("event") == "loader/plugin_download_finish": + log(f"Installation successful: {msg.get('args')}") + success = True + break + + elif m_type == REPLY: + log(f"Server reply: {msg.get('result')}") + + elif m_type == ERROR: + log(f"Server error: {msg.get('error')}") + + except Exception as e: + log(f"Error: {e}") + error = e + finally: + await client.close() + + if error: + raise error + if not success: + raise RuntimeError("Installation did not complete successfully") + + +if __name__ == "__main__": + parser = argparse.ArgumentParser(description="Decky Plugin Installer") + parser.add_argument("--store-url", default="http://127.0.0.1:1337/plugins") + parser.add_argument("--target-id", type=int, default=42) + args = parser.parse_args() + asyncio.run(run_installer(**vars(args))) |