kopia lustrzana https://github.com/micropython/micropython-lib
64 wiersze
1.6 KiB
Python
64 wiersze
1.6 KiB
Python
import uasyncio
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import uhashlib, ubinascii
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import websocket
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def make_respkey(webkey):
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d = uhashlib.sha1(webkey)
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d.update(b"258EAFA5-E914-47DA-95CA-C5AB0DC85B11")
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respkey = d.digest()
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respkey = ubinascii.b2a_base64(respkey) #[:-1]
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# Return with trailing "\n".
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return respkey
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class WSWriter:
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def __init__(self, reader, writer):
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# Reader is passed for symmetry with WSReader() and ignored.
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self.s = writer
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async def awrite(self, data):
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assert len(data) < 126
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await self.s.awrite(b"\x81")
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await self.s.awrite(bytes([len(data)]))
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await self.s.awrite(data)
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def WSReader(reader, writer):
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webkey = None
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while 1:
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l = yield from reader.readline()
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print(l)
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if not l:
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raise ValueError()
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if l == b"\r\n":
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break
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if l.startswith(b'Sec-WebSocket-Key'):
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webkey = l.split(b":", 1)[1]
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webkey = webkey.strip()
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if not webkey:
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raise ValueError("Not a websocker request")
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respkey = make_respkey(webkey)
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await writer.awrite(b"""\
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HTTP/1.1 101 Switching Protocols\r
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Upgrade: websocket\r
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Connection: Upgrade\r
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Sec-WebSocket-Accept: """)
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await writer.awrite(respkey)
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# This will lead to "<key>\n\r\n" being written. Not exactly
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# "\r\n\r\n", but browsers seem to eat it.
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await writer.awrite("\r\n")
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#await writer.awrite("\r\n\r\n")
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print("Finished webrepl handshake")
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ws = websocket.websocket(reader.ios)
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rws = uasyncio.StreamReader(reader.ios, ws)
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return rws
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