142 lines
5.1 KiB
Python
Executable File
142 lines
5.1 KiB
Python
Executable File
import asyncio
|
|
from importlib.resources import files
|
|
|
|
import msgspec
|
|
from html5tagger import E
|
|
from sanic import Forbidden, Sanic, SanicException, errorpages
|
|
from sanic.log import logger
|
|
from sanic.response import html, json, redirect
|
|
|
|
from cista import config, session, watching
|
|
from cista.auth import authbp
|
|
from cista.fileio import FileServer
|
|
from cista.protocol import ControlBase, ErrorMsg, FileRange, StatusMsg
|
|
|
|
app = Sanic("cista")
|
|
fileserver = FileServer()
|
|
watching.register(app, "/api/watch")
|
|
app.blueprint(authbp)
|
|
|
|
@app.on_request
|
|
async def use_session(request):
|
|
request.ctx.session = session.get(request)
|
|
# CSRF protection
|
|
if request.method == "GET" and request.headers.upgrade != "websocket":
|
|
return # Ordinary GET requests are fine
|
|
if request.headers.origin.split("//", 1)[1] != request.host:
|
|
raise Forbidden("Invalid origin: Cross-Site requests not permitted")
|
|
|
|
@app.exception(Exception)
|
|
async def handle_sanic_exception(request, e):
|
|
context, code, message = {}, 500, str(e) or "Internal Server Error"
|
|
if isinstance(e, SanicException):
|
|
context = e.context or {}
|
|
code = e.status_code
|
|
message = f"⚠️ {message}"
|
|
# Non-browsers get JSON errors
|
|
if "text/html" not in request.headers.accept:
|
|
return json({"error": {"code": code, "message": message, **context}}, status=code)
|
|
# Redirections flash the error message via cookies
|
|
if "redirect" in context:
|
|
res = redirect(context["redirect"])
|
|
res.cookies.add_cookie("message", message, max_age=5)
|
|
return res
|
|
# Otherwise use Sanic's default error page
|
|
return errorpages.HTMLRenderer(request, e, debug=app.debug).full()
|
|
|
|
@app.on_response
|
|
async def resphandler(request, response):
|
|
print("In response handler", request.path, response)
|
|
|
|
def asend(ws, msg):
|
|
return ws.send(msg if isinstance(msg, bytes) else msgspec.json.encode(msg).decode())
|
|
|
|
@app.before_server_start
|
|
async def start_fileserver(app, _):
|
|
config.load_config() # Main process may have loaded it but we haven't
|
|
app.static("/files", config.config.path, use_content_range=True, stream_large_files=True, directory_view=True)
|
|
|
|
await fileserver.start()
|
|
|
|
@app.after_server_stop
|
|
async def stop_fileserver(app, _):
|
|
await fileserver.stop()
|
|
|
|
@app.get("/")
|
|
async def index_page(request):
|
|
s = config.config.public or session.get(request)
|
|
if not s:
|
|
return redirect("/login")
|
|
index = files("cista").joinpath("static", "index.html").read_text()
|
|
flash = request.cookies.message
|
|
if flash:
|
|
index += str(E.dialog(flash, id="flash", open=True, style="position: fixed; top: 0; left: 0; width: 100%; opacity: .8"))
|
|
res = html(index)
|
|
session.flash(res, None)
|
|
return res
|
|
return html(index)
|
|
|
|
@app.websocket('/api/upload')
|
|
async def upload(request, ws):
|
|
alink = fileserver.alink
|
|
url = request.url_for("upload")
|
|
while True:
|
|
req = None
|
|
try:
|
|
text = await ws.recv()
|
|
if not isinstance(text, str):
|
|
raise ValueError(f"Expected JSON control, got binary len(data) = {len(text)}")
|
|
req = msgspec.json.decode(text, type=FileRange)
|
|
pos = req.start
|
|
while pos < req.end and (data := await ws.recv()) and isinstance(data, bytes):
|
|
pos += await alink(("upload", req.name, pos, data, req.size))
|
|
if pos != req.end:
|
|
d = f"{len(data)} bytes" if isinstance(data, bytes) else data
|
|
raise ValueError(f"Expected {req.end - pos} more bytes, got {d}")
|
|
# Report success
|
|
res = StatusMsg(status="ack", req=req)
|
|
await asend(ws, res)
|
|
await ws.drain()
|
|
except Exception as e:
|
|
res = ErrorMsg(error=str(e), req=req)
|
|
await asend(ws, res)
|
|
logger.exception(repr(res), e)
|
|
return
|
|
|
|
@app.websocket('/api/download')
|
|
async def download(request, ws):
|
|
alink = fileserver.alink
|
|
while True:
|
|
req = None
|
|
try:
|
|
print("Waiting for download command")
|
|
text = await ws.recv()
|
|
if not isinstance(text, str):
|
|
raise ValueError(f"Expected JSON control, got binary len(data) = {len(text)}")
|
|
req = msgspec.json.decode(text, type=FileRange)
|
|
print("download", req)
|
|
pos = req.start
|
|
while pos < req.end:
|
|
end = min(req.end, pos + (1<<20))
|
|
data = await alink(("download", req.name, pos, end))
|
|
await asend(ws, data)
|
|
pos += len(data)
|
|
# Report success
|
|
res = StatusMsg(status="ack", req=req)
|
|
await asend(ws, res)
|
|
print(ws, dir(ws))
|
|
await ws.drain()
|
|
print(res)
|
|
|
|
except Exception as e:
|
|
res = ErrorMsg(error=str(e), req=req)
|
|
await asend(ws, res)
|
|
logger.exception(repr(res), e)
|
|
return
|
|
|
|
@app.websocket("/api/control")
|
|
async def control(request, websocket):
|
|
cmd = msgspec.json.decode(await websocket.recv(), type=ControlBase)
|
|
await asyncio.to_thread(cmd)
|
|
await asend(websocket, StatusMsg(status="ack", req=cmd))
|