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asyncio doc: enhance TCP client example

This commit is contained in:
Victor Stinner 2014-10-12 11:35:09 +02:00
parent cfbea3a02e
commit 5366434336
1 changed files with 12 additions and 7 deletions
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19
Doc/library/asyncio-protocol.rst
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@ -447,21 +447,26 @@ TCP echo client example, send data and wait until the connection is closed::
import asyncio
class EchoClientProtocol(asyncio.Protocol):
message = 'This is the message. It will be echoed.'
def __init__(self, message, loop):
self.message = message
self.loop = loop
def connection_made(self, transport):
transport.write(self.message.encode())
print('data sent: {}'.format(self.message))
print('Data sent: {!r}'.format(self.message))
def data_received(self, data):
print('data received: {}'.format(data.decode()))
print('Data received: {!r}'.format(data.decode()))
def connection_lost(self, exc):
print('server closed the connection')
asyncio.get_event_loop().stop()
print('The server closed the connection')
print('Stop the event lop')
self.loop.stop()
loop = asyncio.get_event_loop()
coro = loop.create_connection(EchoClientProtocol, '127.0.0.1', 8888)
message = 'Hello World!'
coro = loop.create_connection(lambda: EchoClientProtocol(message, loop),
'127.0.0.1', 8888)
loop.run_until_complete(coro)
loop.run_forever()
loop.close()
@ -494,7 +499,7 @@ TCP echo server example, send back received data and close the connection::
print('Send: {!r}'.format(message))
self.transport.write(data)
print('Close the socket')
print('Close the client socket')
self.transport.close()
loop = asyncio.get_event_loop()