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from aiohttp import web
from aiohttp_jinja2 import template
from watchdog.observers.polling import PollingObserver as Observer
from watchdog.events import FileSystemEventHandler
from os import path, listdir
from importlib.util import spec_from_file_location, module_from_spec
from logging import getLogger
from injector import get_tabs, get_tab
class FileChangeHandler(FileSystemEventHandler):
def __init__(self, loader, plugin_path) -> None:
super().__init__()
self.logger = getLogger("file-watcher")
self.loader : Loader = loader
self.plugin_path = plugin_path
def on_created(self, event):
src_path = event.src_path
if "__pycache__" in src_path:
return
# check to make sure this isn't a directory
if path.isdir(src_path):
return
# get the directory name of the plugin so that we can find its "main.py" and reload it; the
# file that changed is not necessarily the one that needs to be reloaded
self.logger.debug(f"file created: {src_path}")
rel_path = path.relpath(src_path, path.commonprefix([self.plugin_path, src_path]))
plugin_dir = path.split(rel_path)[0]
main_file_path = path.join(self.plugin_path, plugin_dir, "main.py")
if not path.isfile(main_file_path):
return
self.loader.import_plugin(main_file_path, plugin_dir, refresh=True)
def on_modified(self, event):
src_path = event.src_path
if "__pycache__" in src_path:
return
# check to make sure this isn't a directory
if path.isdir(src_path):
return
# get the directory name of the plugin so that we can find its "main.py" and reload it; the
# file that changed is not necessarily the one that needs to be reloaded
self.logger.debug(f"file modified: {src_path}")
plugin_dir = path.split(path.relpath(src_path, path.commonprefix([self.plugin_path, src_path])))[0]
self.loader.import_plugin(path.join(self.plugin_path, plugin_dir, "main.py"), plugin_dir, refresh=True)
class Loader:
def __init__(self, server_instance, plugin_path, loop, live_reload=False) -> None:
self.loop = loop
self.logger = getLogger("Loader")
self.plugin_path = plugin_path
self.logger.info(f"plugin_path: {self.plugin_path}")
self.plugins = {}
self.import_plugins()
if live_reload:
self.observer = Observer()
self.observer.schedule(FileChangeHandler(self, plugin_path), self.plugin_path, recursive=True)
self.observer.start()
server_instance.add_routes([
web.get("/plugins/iframe", self.plugin_iframe_route),
web.get("/plugins/reload", self.reload_plugins),
web.post("/plugins/method_call", self.handle_plugin_method_call),
web.get("/plugins/load_main/{name}", self.load_plugin_main_view),
web.get("/plugins/plugin_resource/{name}/{path:.+}", self.handle_sub_route),
web.get("/plugins/load_tile/{name}", self.load_plugin_tile_view),
web.get("/steam_resource/{path:.+}", self.get_steam_resource)
])
def import_plugin(self, file, plugin_directory, refresh=False):
try:
spec = spec_from_file_location("_", file)
module = module_from_spec(spec)
spec.loader.exec_module(module)
# add member for what directory the given plugin lives under
module.Plugin._plugin_directory = plugin_directory
if not hasattr(module.Plugin, "name"):
raise KeyError("Plugin {} has not defined a name".format(file))
if module.Plugin.name in self.plugins:
if hasattr(module.Plugin, "hot_reload") and not module.Plugin.hot_reload and refresh:
self.logger.info("Plugin {} is already loaded and has requested to not be re-loaded"
.format(module.Plugin.name))
return
else:
if hasattr(self.plugins[module.Plugin.name], "task"):
self.plugins[module.Plugin.name].task.cancel()
self.plugins.pop(module.Plugin.name, None)
self.plugins[module.Plugin.name] = module.Plugin()
if hasattr(module.Plugin, "__main"):
setattr(self.plugins[module.Plugin.name], "task",
self.loop.create_task(self.plugins[module.Plugin.name].__main()))
self.logger.info("Loaded {}".format(module.Plugin.name))
except Exception as e:
self.logger.error("Could not load {}. {}".format(file, e))
finally:
if refresh:
self.loop.create_task(self.refresh_iframe())
def import_plugins(self):
self.logger.info(f"import plugins from {self.plugin_path}")
directories = [i for i in listdir(self.plugin_path) if path.isdir(path.join(self.plugin_path, i)) and path.isfile(path.join(self.plugin_path, i, "main.py"))]
for directory in directories:
self.logger.info(f"found plugin: {directory}")
self.import_plugin(path.join(self.plugin_path, directory, "main.py"), directory)
async def reload_plugins(self, request=None):
self.logger.info("Re-importing plugins.")
self.import_plugins()
async def handle_plugin_method_call(self, plugin_name, method_name, **kwargs):
if method_name.startswith("__"):
raise RuntimeError("Tried to call private method")
return await getattr(self.plugins[plugin_name], method_name)(**kwargs)
async def get_steam_resource(self, request):
tab = (await get_tabs())[0]
try:
return web.Response(text=await tab.get_steam_resource(f"https://steamloopback.host/{request.match_info['path']}"), content_type="text/html")
except Exception as e:
return web.Response(text=str(e), status=400)
async def load_plugin_main_view(self, request):
plugin = self.plugins[request.match_info["name"]]
# open up the main template
with open(path.join(self.plugin_path, plugin._plugin_directory, plugin.main_view_html), 'r') as template:
template_data = template.read()
# setup the main script, plugin, and pull in the template
ret = """
<script src="/static/library.js"></script>
<script>const plugin_name = '{}' </script>
<base href="http://127.0.0.1:1337/plugins/plugin_resource/{}/">
{}
""".format(plugin.name, plugin.name, template_data)
return web.Response(text=ret, content_type="text/html")
async def handle_sub_route(self, request):
plugin = self.plugins[request.match_info["name"]]
route_path = request.match_info["path"]
self.logger.info(path)
ret = ""
file_path = path.join(self.plugin_path, plugin._plugin_directory, route_path)
with open(file_path, 'r') as resource_data:
ret = resource_data.read()
return web.Response(text=ret)
async def load_plugin_tile_view(self, request):
plugin = self.plugins[request.match_info["name"]]
inner_content = ""
# open up the tile template (if we have one defined)
if len(plugin.tile_view_html) > 0:
with open(path.join(self.plugin_path, plugin._plugin_directory, plugin.tile_view_html), 'r') as template:
template_data = template.read()
inner_content = template_data
# setup the default template
ret = """
<html style="height: fit-content;">
<head>
<link rel="stylesheet" href="/steam_resource/css/2.css">
<link rel="stylesheet" href="/steam_resource/css/39.css">
<link rel="stylesheet" href="/steam_resource/css/library.css">
<script src="/static/library.js"></script>
<script>const plugin_name = '{name}';</script>
</head>
<body style="height: fit-content; display: block;">
{content}
</body>
<html>
""".format(name=plugin.name, content=inner_content)
return web.Response(text=ret, content_type="text/html")
@template('plugin_view.html')
async def plugin_iframe_route(self, request):
return {"plugins": self.plugins.values()}
async def refresh_iframe(self):
tab = await get_tab("QuickAccess")
await tab.open_websocket()
return await tab.evaluate_js("reloadIframe()")
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