98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
import asyncio
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from importlib.resources import files
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import msgspec
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from sanic import Sanic
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from sanic.log import logger
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from sanic.response import html
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from . import watching
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from .fileio import ROOT, FileServer
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from .protocol import ErrorMsg, FileRange, StatusMsg
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app = Sanic("cista")
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fileserver = FileServer()
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watching.register(app, "/api/watch")
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def asend(ws, msg):
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return ws.send(msg if isinstance(msg, bytes) else msgspec.json.encode(msg).decode())
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@app.before_server_start
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async def start_fileserver(app, _):
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await fileserver.start()
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@app.after_server_stop
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async def stop_fileserver(app, _):
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await fileserver.stop()
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@app.get("/")
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async def index_page(request):
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index = files("cista").joinpath("static", "index.html").read_text()
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return html(index)
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app.static("/files", ROOT, use_content_range=True, stream_large_files=True, directory_view=True)
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@app.websocket('/api/upload')
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async def upload(request, ws):
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alink = fileserver.alink
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url = request.url_for("upload")
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while True:
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req = None
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try:
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text = await ws.recv()
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if not isinstance(text, str):
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raise ValueError(f"Expected JSON control, got binary len(data) = {len(text)}")
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req = msgspec.json.decode(text, type=FileRange)
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pos = req.start
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while pos < req.end and (data := await ws.recv()) and isinstance(data, bytes):
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pos += await alink(("upload", req.name, pos, data, req.size))
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if pos != req.end:
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d = f"{len(data)} bytes" if isinstance(data, bytes) else data
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raise ValueError(f"Expected {req.end - pos} more bytes, got {d}")
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# Report success
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res = StatusMsg(status="ack", req=req)
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await asend(ws, res)
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await ws.drain()
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except Exception as e:
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res = ErrorMsg(error=str(e), req=req)
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await asend(ws, res)
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logger.exception(repr(res), e)
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return
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@app.websocket("/ws")
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async def ws(request, ws):
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while True:
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data = await ws.recv()
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await ws.send(data)
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@app.websocket('/api/download')
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async def download(request, ws):
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alink = fileserver.alink
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while True:
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req = None
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try:
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print("Waiting for download command")
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text = await ws.recv()
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if not isinstance(text, str):
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raise ValueError(f"Expected JSON control, got binary len(data) = {len(text)}")
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req = msgspec.json.decode(text, type=FileRange)
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print("download", req)
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pos = req.start
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while pos < req.end:
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end = min(req.end, pos + (1<<20))
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data = await alink(("download", req.name, pos, end))
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await asend(ws, data)
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pos += len(data)
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# Report success
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res = StatusMsg(status="ack", req=req)
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await asend(ws, res)
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print(ws, dir(ws))
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await ws.drain()
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print(res)
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except Exception as e:
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res = ErrorMsg(error=str(e), req=req)
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await asend(ws, res)
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logger.exception(repr(res), e)
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return
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