mirror of https://github.com/nocturn9x/giambio.git
298 lines
8.3 KiB
Python
298 lines
8.3 KiB
Python
"""
|
|
Basic abstraction layers for all async I/O primitives
|
|
|
|
Copyright (C) 2020 nocturn9x
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
"""
|
|
|
|
import ssl
|
|
from socket import SOL_SOCKET, SO_ERROR
|
|
import socket as builtin_socket
|
|
from giambio.exceptions import ResourceClosed
|
|
from giambio.traps import want_write, want_read, io_release
|
|
|
|
try:
|
|
from ssl import SSLWantReadError, SSLWantWriteError
|
|
|
|
WantRead = (BlockingIOError, InterruptedError, SSLWantReadError)
|
|
WantWrite = (BlockingIOError, InterruptedError, SSLWantWriteError)
|
|
except ImportError:
|
|
WantRead = (BlockingIOError, InterruptedError)
|
|
WantWrite = (BlockingIOError, InterruptedError)
|
|
|
|
|
|
class AsyncSocket:
|
|
"""
|
|
Abstraction layer for asynchronous sockets
|
|
"""
|
|
|
|
def __init__(self, sock):
|
|
self.sock = sock
|
|
self._fd = sock.fileno()
|
|
self.sock.setblocking(False)
|
|
|
|
async def receive(self, max_size: int, flags: int = 0) -> bytes:
|
|
"""
|
|
Receives up to max_size bytes from a socket asynchronously
|
|
"""
|
|
|
|
assert max_size >= 1, "max_size must be >= 1"
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
while True:
|
|
try:
|
|
return self.sock.recv(max_size, flags)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
|
|
async def accept(self):
|
|
"""
|
|
Accepts the socket, completing the 3-step TCP handshake asynchronously
|
|
"""
|
|
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
while True:
|
|
try:
|
|
remote, addr = self.sock.accept()
|
|
return type(self)(remote), addr
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
|
|
async def send_all(self, data: bytes, flags: int = 0):
|
|
"""
|
|
Sends all data inside the buffer asynchronously until it is empty
|
|
"""
|
|
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
while data:
|
|
try:
|
|
sent_no = self.sock.send(data, flags)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
data = data[sent_no:]
|
|
|
|
async def close(self):
|
|
"""
|
|
Closes the socket asynchronously
|
|
"""
|
|
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
await io_release(self.sock)
|
|
self.sock.close()
|
|
self._sock = None
|
|
self.sock = -1
|
|
|
|
async def shutdown(self, how):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
if self.sock:
|
|
self.sock.shutdown(how)
|
|
|
|
async def connect(self, addr: tuple):
|
|
"""
|
|
Connects the socket to an endpoint
|
|
"""
|
|
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
try:
|
|
self.sock.connect(addr)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
self.sock.connect(addr)
|
|
|
|
async def bind(self, addr: tuple):
|
|
"""
|
|
Binds the socket to an address
|
|
|
|
:param addr: The address, port tuple to bind to
|
|
:type addr: tuple
|
|
"""
|
|
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
self.sock.bind(addr)
|
|
|
|
async def listen(self, backlog: int):
|
|
"""
|
|
Starts listening with the given backlog
|
|
|
|
:param backlog: The socket's backlog
|
|
:type backlog: int
|
|
"""
|
|
|
|
if self._fd == -1:
|
|
raise ResourceClosed("I/O operation on closed socket")
|
|
self.sock.listen(backlog)
|
|
|
|
async def __aenter__(self):
|
|
self.sock.__enter__()
|
|
return self
|
|
|
|
async def __aexit__(self, *args):
|
|
if self.sock:
|
|
self.sock.__exit__(*args)
|
|
|
|
# Yes, I stole these from Curio because I could not be
|
|
# arsed to write a bunch of uninteresting simple socket
|
|
# methods from scratch, deal with it.
|
|
|
|
def fileno(self):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
return self._fd
|
|
|
|
def settimeout(self, seconds):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
raise RuntimeError("Use with_timeout() to set a timeout")
|
|
|
|
def gettimeout(self):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
return None
|
|
|
|
def dup(self):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
return type(self)(self._socket.dup())
|
|
|
|
async def do_handshake(self):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
return self.sock.do_handshake()
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
|
|
async def connect(self, address):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
try:
|
|
result = self.sock.connect(address)
|
|
if getattr(self, "do_handshake_on_connect", False):
|
|
await self.do_handshake()
|
|
return result
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
err = self.sock.getsockopt(SOL_SOCKET, SO_ERROR)
|
|
if err != 0:
|
|
raise OSError(err, f"Connect call failed {address}")
|
|
if getattr(self, "do_handshake_on_connect", False):
|
|
await self.do_handshake()
|
|
|
|
async def recvfrom(self, buffersize, flags=0):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
return self.sock.recvfrom(buffersize, flags)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
|
|
async def recvfrom_into(self, buffer, bytes=0, flags=0):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
return self.sock.recvfrom_into(buffer, bytes, flags)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
|
|
async def sendto(self, bytes, flags_or_address, address=None):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
if address:
|
|
flags = flags_or_address
|
|
else:
|
|
address = flags_or_address
|
|
flags = 0
|
|
while True:
|
|
try:
|
|
return self.sock.sendto(bytes, flags, address)
|
|
except WantWrite:
|
|
await want_write(self.sock)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
|
|
async def recvmsg(self, bufsize, ancbufsize=0, flags=0):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
return self.sock.recvmsg(bufsize, ancbufsize, flags)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
|
|
async def recvmsg_into(self, buffers, ancbufsize=0, flags=0):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
return self.sock.recvmsg_into(buffers, ancbufsize, flags)
|
|
except WantRead:
|
|
await want_read(self.sock)
|
|
|
|
async def sendmsg(self, buffers, ancdata=(), flags=0, address=None):
|
|
"""
|
|
Wrapper socket method
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
return self.sock.sendmsg(buffers, ancdata, flags, address)
|
|
except WantRead:
|
|
await want_write(self.sock)
|
|
|
|
def __repr__(self):
|
|
return f"AsyncSocket({self.sock})"
|