/
injector.py
438 lines (358 loc) · 14.3 KB
/
injector.py
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# Injector code from https://github.com/SteamDeckHomebrew/steamdeck-ui-inject. More info on how it works there.
from asyncio import sleep
from logging import getLogger
from typing import Any, Callable, List, TypedDict, Dict
from aiohttp import ClientSession
from aiohttp.client_exceptions import ClientConnectorError, ClientOSError
from asyncio.exceptions import TimeoutError
import uuid
BASE_ADDRESS = "http://localhost:8080"
logger = getLogger("Injector")
class _TabResponse(TypedDict):
title: str
id: str
url: str
webSocketDebuggerUrl: str
class Tab:
cmd_id = 0
def __init__(self, res: _TabResponse) -> None:
self.title: str = res["title"]
self.id: str = res["id"]
self.url: str = res["url"]
self.ws_url: str = res["webSocketDebuggerUrl"]
self.websocket = None
self.client = None
async def open_websocket(self):
self.client = ClientSession()
self.websocket = await self.client.ws_connect(self.ws_url) # type: ignore
async def close_websocket(self):
if self.websocket:
await self.websocket.close()
if self.client:
await self.client.close()
async def listen_for_message(self):
if self.websocket:
async for message in self.websocket:
data = message.json()
yield data
logger.warn(f"The Tab {self.title} socket has been disconnected while listening for messages.")
await self.close_websocket()
async def _send_devtools_cmd(self, dc: Dict[str, Any], receive: bool = True):
if self.websocket:
self.cmd_id += 1
dc["id"] = self.cmd_id
await self.websocket.send_json(dc)
if receive:
async for msg in self.listen_for_message():
if "id" in msg and msg["id"] == dc["id"]:
return msg
return None
raise RuntimeError("Websocket not opened")
async def evaluate_js(self, js: str, run_async: bool | None = False, manage_socket: bool | None = True, get_result: bool = True):
try:
if manage_socket:
await self.open_websocket()
res = await self._send_devtools_cmd({
"method": "Runtime.evaluate",
"params": {
"expression": js,
"userGesture": True,
"awaitPromise": run_async
}
}, get_result)
finally:
if manage_socket:
await self.close_websocket()
return res
async def has_global_var(self, var_name: str, manage_socket: bool = True):
res = await self.evaluate_js(f"window['{var_name}'] !== null && window['{var_name}'] !== undefined", False, manage_socket)
assert res is not None
if not "result" in res or not "result" in res["result"] or not "value" in res["result"]["result"]:
return False
return res["result"]["result"]["value"]
async def close(self, manage_socket: bool = True):
try:
if manage_socket:
await self.open_websocket()
res = await self._send_devtools_cmd({
"method": "Page.close",
}, False)
finally:
if manage_socket:
await self.close_websocket()
return res
async def enable(self):
"""
Enables page domain notifications.
"""
await self._send_devtools_cmd({
"method": "Page.enable",
}, False)
async def disable(self):
"""
Disables page domain notifications.
"""
await self._send_devtools_cmd({
"method": "Page.disable",
}, False)
async def refresh(self, manage_socket: bool = True):
try:
if manage_socket:
await self.open_websocket()
await self._send_devtools_cmd({
"method": "Page.reload",
}, False)
finally:
if manage_socket:
await self.close_websocket()
return
async def reload_and_evaluate(self, js: str, manage_socket: bool = True):
"""
Reloads the current tab, with JS to run on load via debugger
"""
try:
if manage_socket:
await self.open_websocket()
await self._send_devtools_cmd({
"method": "Debugger.enable"
}, True)
await self._send_devtools_cmd({
"method": "Runtime.evaluate",
"params": {
"expression": "location.reload();",
"userGesture": True,
"awaitPromise": False
}
}, False)
breakpoint_res = await self._send_devtools_cmd({
"method": "Debugger.setInstrumentationBreakpoint",
"params": {
"instrumentation": "beforeScriptExecution"
}
}, True)
assert breakpoint_res is not None
logger.info(breakpoint_res)
# Page finishes loading when breakpoint hits
for _ in range(20):
# this works around 1/5 of the time, so just send it 8 times.
# the js accounts for being injected multiple times allowing only one instance to run at a time anyway
await self._send_devtools_cmd({
"method": "Runtime.evaluate",
"params": {
"expression": js,
"userGesture": True,
"awaitPromise": False
}
}, False)
await self._send_devtools_cmd({
"method": "Debugger.removeBreakpoint",
"params": {
"breakpointId": breakpoint_res["result"]["breakpointId"]
}
}, False)
for _ in range(4):
await self._send_devtools_cmd({
"method": "Debugger.resume"
}, False)
await self._send_devtools_cmd({
"method": "Debugger.disable"
}, True)
finally:
if manage_socket:
await self.close_websocket()
return
async def add_script_to_evaluate_on_new_document(self, js: str, add_dom_wrapper: bool = True, manage_socket: bool = True, get_result: bool = True):
"""
How the underlying call functions is not particularly clear from the devtools docs, so stealing puppeteer's description:
Adds a function which would be invoked in one of the following scenarios:
* whenever the page is navigated
* whenever the child frame is attached or navigated. In this case, the
function is invoked in the context of the newly attached frame.
The function is invoked after the document was created but before any of
its scripts were run. This is useful to amend the JavaScript environment,
e.g. to seed `Math.random`.
Parameters
----------
js : str
The script to evaluate on new document
add_dom_wrapper : bool
True to wrap the script in a wait for the 'DOMContentLoaded' event.
DOM will usually not exist when this execution happens,
so it is necessary to delay til DOM is loaded if you are modifying it
manage_socket : bool
True to have this function handle opening/closing the websocket for this tab
get_result : bool
True to wait for the result of this call
Returns
-------
int or None
The identifier of the script added, used to remove it later.
(see remove_script_to_evaluate_on_new_document below)
None is returned if `get_result` is False
"""
try:
wrappedjs = """
function scriptFunc() {
{js}
}
if (document.readyState === 'loading') {
addEventListener('DOMContentLoaded', () => {
scriptFunc();
});
} else {
scriptFunc();
}
""".format(js=js) if add_dom_wrapper else js
if manage_socket:
await self.open_websocket()
res = await self._send_devtools_cmd({
"method": "Page.addScriptToEvaluateOnNewDocument",
"params": {
"source": wrappedjs
}
}, get_result)
finally:
if manage_socket:
await self.close_websocket()
return res
async def remove_script_to_evaluate_on_new_document(self, script_id: str, manage_socket: bool = True):
"""
Removes a script from a page that was added with `add_script_to_evaluate_on_new_document`
Parameters
----------
script_id : int
The identifier of the script to remove (returned from `add_script_to_evaluate_on_new_document`)
"""
try:
if manage_socket:
await self.open_websocket()
await self._send_devtools_cmd({
"method": "Page.removeScriptToEvaluateOnNewDocument",
"params": {
"identifier": script_id
}
}, False)
finally:
if manage_socket:
await self.close_websocket()
async def has_element(self, element_name: str, manage_socket: bool = True):
res = await self.evaluate_js(f"document.getElementById('{element_name}') != null", False, manage_socket)
assert res is not None
if not "result" in res or not "result" in res["result"] or not "value" in res["result"]["result"]:
return False
return res["result"]["result"]["value"]
async def inject_css(self, style: str, manage_socket: bool = True):
try:
css_id = str(uuid.uuid4())
result = await self.evaluate_js(
f"""
(function() {{
const style = document.createElement('style');
style.id = "{css_id}";
document.head.append(style);
style.textContent = `{style}`;
}})()
""", False, manage_socket)
assert result is not None
if "exceptionDetails" in result["result"]:
return {
"success": False,
"result": result["result"]
}
return {
"success": True,
"result": css_id
}
except Exception as e:
return {
"success": False,
"result": e
}
async def remove_css(self, css_id: str, manage_socket: bool = True):
try:
result = await self.evaluate_js(
f"""
(function() {{
let style = document.getElementById("{css_id}");
if (style.nodeName.toLowerCase() == 'style')
style.parentNode.removeChild(style);
}})()
""", False, manage_socket)
assert result is not None
if "exceptionDetails" in result["result"]:
return {
"success": False,
"result": result
}
return {
"success": True
}
except Exception as e:
return {
"success": False,
"result": e
}
async def get_steam_resource(self, url: str):
res = await self.evaluate_js(f'(async function test() {{ return await (await fetch("{url}")).text() }})()', True)
assert res is not None
return res["result"]["result"]["value"]
def __repr__(self):
return self.title
async def get_tabs() -> List[Tab]:
res = {}
na = False
while True:
try:
async with ClientSession() as web:
res = await web.get(f"{BASE_ADDRESS}/json", timeout=3)
except ClientConnectorError:
if not na:
logger.debug("Steam isn't available yet. Wait for a moment...")
na = True
await sleep(5)
except ClientOSError:
logger.warn(f"The request to {BASE_ADDRESS}/json was reset")
await sleep(1)
except TimeoutError:
logger.warn(f"The request to {BASE_ADDRESS}/json timed out")
await sleep(1)
else:
break
if res.status == 200:
r = await res.json()
return [Tab(i) for i in r]
else:
raise Exception(f"/json did not return 200. {await res.text()}")
async def get_tab(tab_name: str) -> Tab:
tabs = await get_tabs()
tab = next((i for i in tabs if i.title == tab_name), None)
if not tab:
raise ValueError(f"Tab {tab_name} not found")
return tab
async def get_tab_lambda(test: Callable[[Tab], bool]) -> Tab:
tabs = await get_tabs()
tab = next((i for i in tabs if test(i)), None)
if not tab:
raise ValueError(f"Tab not found by lambda")
return tab
SHARED_CTX_NAMES = ["SharedJSContext", "Steam Shared Context presented by Valve™", "Steam", "SP"]
CLOSEABLE_URLS = ["about:blank", "data:text/html,%3Cbody%3E%3C%2Fbody%3E"] # Closing anything other than these *really* likes to crash Steam
DO_NOT_CLOSE_URL = "Valve Steam Gamepad/default" # Steam Big Picture Mode tab
def tab_is_gamepadui(t: Tab) -> bool:
return "https://steamloopback.host/routes/" in t.url and t.title in SHARED_CTX_NAMES
async def get_gamepadui_tab() -> Tab:
tabs = await get_tabs()
tab = next((i for i in tabs if tab_is_gamepadui(i)), None)
if not tab:
raise ValueError(f"GamepadUI Tab not found")
return tab
async def inject_to_tab(tab_name: str, js: str, run_async: bool = False):
tab = await get_tab(tab_name)
return await tab.evaluate_js(js, run_async)
async def close_old_tabs():
tabs = await get_tabs()
for t in tabs:
if not t.title or (t.title not in SHARED_CTX_NAMES and any(url in t.url for url in CLOSEABLE_URLS) and DO_NOT_CLOSE_URL not in t.url):
logger.debug("Closing tab: " + getattr(t, "title", "Untitled"))
await t.close()
await sleep(0.5)