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# Test asyncio TCP stream closing then writing
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
PORT = 8000
async def handle_connection(reader, writer):
# Write data to ensure connection
writer.write(b"x")
await writer.drain()
# Read, should return nothing
print("read:", await reader.read(100))
# Close connection
print("close")
writer.close()
await writer.wait_closed()
print("done")
ev.set()
async def tcp_server():
global ev
ev = asyncio.Event()
server = await asyncio.start_server(handle_connection, "0.0.0.0", PORT)
print("server running")
multitest.next()
async with server:
await asyncio.wait_for(ev.wait(), 10)
async def tcp_client():
reader, writer = await asyncio.open_connection(IP, PORT)
# Read data to ensure connection
print("read:", await reader.read(1))
# Close connection
print("close")
writer.close()
await writer.wait_closed()
# Try writing data to the closed connection
print("write")
try:
writer.write(b"x")
await writer.drain()
except OSError:
print("OSError")
def instance0():
multitest.globals(IP=multitest.get_network_ip())
asyncio.run(tcp_server())
def instance1():
multitest.next()
asyncio.run(tcp_client())
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