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import argparse
import asyncio
import gc
import os.path
import pathlib
import socket
import ssl
PRINT = 0
async def echo_server(loop, address, unix):
if unix:
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
else:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(address)
sock.listen(5)
sock.setblocking(False)
if PRINT:
print('Server listening at', address)
with sock:
while True:
client, addr = await loop.sock_accept(sock)
if PRINT:
print('Connection from', addr)
loop.create_task(echo_client(loop, client))
async def echo_client(loop, client):
try:
client.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
except (OSError, NameError):
pass
with client:
while True:
data = await loop.sock_recv(client, 1000000)
if not data:
break
await loop.sock_sendall(client, data)
if PRINT:
print('Connection closed')
async def echo_client_streams(reader, writer):
sock = writer.get_extra_info('socket')
try:
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
except (OSError, NameError):
pass
if PRINT:
print('Connection from', sock.getpeername())
while True:
data = await reader.read(1000000)
if not data:
break
writer.write(data)
if PRINT:
print('Connection closed')
writer.close()
class EchoProtocol(asyncio.Protocol):
def connection_made(self, transport):
self.transport = transport
def connection_lost(self, exc):
self.transport = None
def data_received(self, data):
self.transport.write(data)
class EchoBufferedProtocol(asyncio.BufferedProtocol):
def connection_made(self, transport):
self.transport = transport
# Here the buffer is intended to be copied, so that the outgoing buffer
# won't be wrongly updated by next read
self.buffer = bytearray(256 * 1024)
def connection_lost(self, exc):
self.transport = None
def get_buffer(self, sizehint):
return self.buffer
def buffer_updated(self, nbytes):
self.transport.write(self.buffer[:nbytes])
async def print_debug(loop):
while True:
print(chr(27) + "[2J") # clear screen
loop.print_debug_info()
await asyncio.sleep(0.5)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--uvloop', default=False, action='store_true')
parser.add_argument('--streams', default=False, action='store_true')
parser.add_argument('--proto', default=False, action='store_true')
parser.add_argument('--addr', default='127.0.0.1:25000', type=str)
parser.add_argument('--print', default=False, action='store_true')
parser.add_argument('--ssl', default=False, action='store_true')
parser.add_argument('--buffered', default=False, action='store_true')
args = parser.parse_args()
if args.uvloop:
import uvloop
loop = uvloop.new_event_loop()
print('using UVLoop')
else:
loop = asyncio.new_event_loop()
print('using asyncio loop')
asyncio.set_event_loop(loop)
loop.set_debug(False)
if args.print:
PRINT = 1
if hasattr(loop, 'print_debug_info'):
loop.create_task(print_debug(loop))
PRINT = 0
unix = False
if args.addr.startswith('file:'):
unix = True
addr = args.addr[5:]
if os.path.exists(addr):
os.remove(addr)
else:
addr = args.addr.split(':')
addr[1] = int(addr[1])
addr = tuple(addr)
print('serving on: {}'.format(addr))
server_context = None
if args.ssl:
print('with SSL')
if hasattr(ssl, 'PROTOCOL_TLS'):
server_context = ssl.SSLContext(ssl.PROTOCOL_TLS)
else:
server_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
server_context.load_cert_chain(
(pathlib.Path(__file__).parent.parent.parent /
'tests' / 'certs' / 'ssl_cert.pem'),
(pathlib.Path(__file__).parent.parent.parent /
'tests' / 'certs' / 'ssl_key.pem'))
if hasattr(server_context, 'check_hostname'):
server_context.check_hostname = False
server_context.verify_mode = ssl.CERT_NONE
if args.streams:
if args.proto:
print('cannot use --stream and --proto simultaneously')
exit(1)
if args.buffered:
print('cannot use --stream and --buffered simultaneously')
exit(1)
print('using asyncio/streams')
if unix:
coro = asyncio.start_unix_server(echo_client_streams,
addr,
ssl=server_context)
else:
coro = asyncio.start_server(echo_client_streams,
*addr,
ssl=server_context)
srv = loop.run_until_complete(coro)
elif args.proto:
if args.streams:
print('cannot use --stream and --proto simultaneously')
exit(1)
if args.buffered:
print('using buffered protocol')
protocol = EchoBufferedProtocol
else:
print('using simple protocol')
protocol = EchoProtocol
if unix:
coro = loop.create_unix_server(protocol, addr,
ssl=server_context)
else:
coro = loop.create_server(protocol, *addr,
ssl=server_context)
srv = loop.run_until_complete(coro)
else:
if args.ssl:
print('cannot use SSL for loop.sock_* methods')
exit(1)
print('using sock_recv/sock_sendall')
loop.create_task(echo_server(loop, addr, unix))
try:
loop.run_forever()
finally:
if hasattr(loop, 'print_debug_info'):
gc.collect()
print(chr(27) + "[2J")
loop.print_debug_info()
loop.close()
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