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?? ..
?? __init__.py(1.62 KB)
?? __pycache__
?? _asyncbackend.py(2.34 KB)
?? _asyncio_backend.py(8.84 KB)
?? _ddr.py(5.12 KB)
?? _features.py(2.43 KB)
?? _immutable_ctx.py(2.4 KB)
?? _trio_backend.py(8.27 KB)
?? asyncbackend.py(2.73 KB)
?? asyncquery.py(30.1 KB)
?? asyncresolver.py(17.43 KB)
?? dnssec.py(40.74 KB)
?? dnssecalgs
?? dnssectypes.py(1.76 KB)
?? e164.py(3.88 KB)
?? edns.py(16.69 KB)
?? entropy.py(4.14 KB)
?? enum.py(3.6 KB)
?? exception.py(5.81 KB)
?? flags.py(2.69 KB)
?? grange.py(2.09 KB)
?? immutable.py(1.97 KB)
?? inet.py(5.64 KB)
?? ipv4.py(2.49 KB)
?? ipv6.py(6.4 KB)
?? message.py(66.59 KB)
?? name.py(41.78 KB)
?? namedict.py(3.91 KB)
?? nameserver.py(9.88 KB)
?? node.py(12.37 KB)
?? opcode.py(2.67 KB)
?? py.typed(0 B)
?? query.py(54.98 KB)
?? quic
?? rcode.py(4.06 KB)
?? rdata.py(30.29 KB)
?? rdataclass.py(2.91 KB)
?? rdataset.py(16.27 KB)
?? rdatatype.py(7.27 KB)
?? rdtypes
?? renderer.py(10.99 KB)
?? resolver.py(72 KB)
?? reversename.py(3.74 KB)
?? rrset.py(8.96 KB)
?? serial.py(3.52 KB)
?? set.py(9 KB)
?? tokenizer.py(23.03 KB)
?? transaction.py(22.06 KB)
?? tsig.py(11.15 KB)
?? tsigkeyring.py(2.57 KB)
?? ttl.py(2.91 KB)
?? update.py(11.96 KB)
?? version.py(1.88 KB)
?? versioned.py(11.49 KB)
?? win32util.py(8.67 KB)
?? wire.py(2.76 KB)
?? xfr.py(12.96 KB)
?? zone.py(50.87 KB)
?? zonefile.py(27.27 KB)
?? zonetypes.py(690 B)

Editing: _trio_backend.py

# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

"""trio async I/O library query support"""

import socket

import trio
import trio.socket  # type: ignore

import dns._asyncbackend
import dns._features
import dns.exception
import dns.inet

if not dns._features.have("trio"):
    raise ImportError("trio not found or too old")

def _maybe_timeout(timeout):
    if timeout is not None:
        return trio.move_on_after(timeout)
    else:
        return dns._asyncbackend.NullContext()

# for brevity
_lltuple = dns.inet.low_level_address_tuple

# pylint: disable=redefined-outer-name

class DatagramSocket(dns._asyncbackend.DatagramSocket):
    def __init__(self, sock):
        super().__init__(sock.family, socket.SOCK_DGRAM)
        self.socket = sock

async def sendto(self, what, destination, timeout):
        with _maybe_timeout(timeout):
            if destination is None:
                return await self.socket.send(what)
            else:
                return await self.socket.sendto(what, destination)
        raise dns.exception.Timeout(
            timeout=timeout
        )  # pragma: no cover  lgtm[py/unreachable-statement]

async def recvfrom(self, size, timeout):
        with _maybe_timeout(timeout):
            return await self.socket.recvfrom(size)
        raise dns.exception.Timeout(timeout=timeout)  # lgtm[py/unreachable-statement]

async def close(self):
        self.socket.close()

async def getpeername(self):
        return self.socket.getpeername()

async def getsockname(self):
        return self.socket.getsockname()

async def getpeercert(self, timeout):
        raise NotImplementedError

class StreamSocket(dns._asyncbackend.StreamSocket):
    def __init__(self, family, stream, tls=False):
        super().__init__(family, socket.SOCK_STREAM)
        self.stream = stream
        self.tls = tls

async def sendall(self, what, timeout):
        with _maybe_timeout(timeout):
            return await self.stream.send_all(what)
        raise dns.exception.Timeout(timeout=timeout)  # lgtm[py/unreachable-statement]

async def recv(self, size, timeout):
        with _maybe_timeout(timeout):
            return await self.stream.receive_some(size)
        raise dns.exception.Timeout(timeout=timeout)  # lgtm[py/unreachable-statement]

async def close(self):
        await self.stream.aclose()

async def getpeername(self):
        if self.tls:
            return self.stream.transport_stream.socket.getpeername()
        else:
            return self.stream.socket.getpeername()

async def getsockname(self):
        if self.tls:
            return self.stream.transport_stream.socket.getsockname()
        else:
            return self.stream.socket.getsockname()

async def getpeercert(self, timeout):
        if self.tls:
            with _maybe_timeout(timeout):
                await self.stream.do_handshake()
            return self.stream.getpeercert()
        else:
            raise NotImplementedError

if dns._features.have("doh"):
    import httpcore
    import httpcore._backends.trio
    import httpx

_CoreAsyncNetworkBackend = httpcore.AsyncNetworkBackend
    _CoreTrioStream = httpcore._backends.trio.TrioStream

from dns.query import _compute_times, _expiration_for_this_attempt, _remaining

class _NetworkBackend(_CoreAsyncNetworkBackend):
        def __init__(self, resolver, local_port, bootstrap_address, family):
            super().__init__()
            self._local_port = local_port
            self._resolver = resolver
            self._bootstrap_address = bootstrap_address
            self._family = family

async def connect_tcp(
            self, host, port, timeout, local_address, socket_options=None
        ):  # pylint: disable=signature-differs
            addresses = []
            _, expiration = _compute_times(timeout)
            if dns.inet.is_address(host):
                addresses.append(host)
            elif self._bootstrap_address is not None:
                addresses.append(self._bootstrap_address)
            else:
                timeout = _remaining(expiration)
                family = self._family
                if local_address:
                    family = dns.inet.af_for_address(local_address)
                answers = await self._resolver.resolve_name(
                    host, family=family, lifetime=timeout
                )
                addresses = answers.addresses()
            for address in addresses:
                try:
                    af = dns.inet.af_for_address(address)
                    if local_address is not None or self._local_port != 0:
                        source = (local_address, self._local_port)
                    else:
                        source = None
                    destination = (address, port)
                    attempt_expiration = _expiration_for_this_attempt(2.0, expiration)
                    timeout = _remaining(attempt_expiration)
                    sock = await Backend().make_socket(
                        af, socket.SOCK_STREAM, 0, source, destination, timeout
                    )
                    return _CoreTrioStream(sock.stream)
                except Exception:
                    continue
            raise httpcore.ConnectError

async def connect_unix_socket(
            self, path, timeout, socket_options=None
        ):  # pylint: disable=signature-differs
            raise NotImplementedError

async def sleep(self, seconds):  # pylint: disable=signature-differs
            await trio.sleep(seconds)

class _HTTPTransport(httpx.AsyncHTTPTransport):
        def __init__(
            self,
            *args,
            local_port=0,
            bootstrap_address=None,
            resolver=None,
            family=socket.AF_UNSPEC,
            **kwargs,
        ):
            if resolver is None and bootstrap_address is None:
                # pylint: disable=import-outside-toplevel,redefined-outer-name
                import dns.asyncresolver

resolver = dns.asyncresolver.Resolver()
            super().__init__(*args, **kwargs)
            self._pool._network_backend = _NetworkBackend(
                resolver, local_port, bootstrap_address, family
            )

else:
    _HTTPTransport = dns._asyncbackend.NullTransport  # type: ignore

class Backend(dns._asyncbackend.Backend):
    def name(self):
        return "trio"

async def make_socket(
        self,
        af,
        socktype,
        proto=0,
        source=None,
        destination=None,
        timeout=None,
        ssl_context=None,
        server_hostname=None,
    ):
        s = trio.socket.socket(af, socktype, proto)
        stream = None
        try:
            if source:
                await s.bind(_lltuple(source, af))
            if socktype == socket.SOCK_STREAM or destination is not None:
                connected = False
                with _maybe_timeout(timeout):
                    await s.connect(_lltuple(destination, af))
                    connected = True
                if not connected:
                    raise dns.exception.Timeout(
                        timeout=timeout
                    )  # lgtm[py/unreachable-statement]
        except Exception:  # pragma: no cover
            s.close()
            raise
        if socktype == socket.SOCK_DGRAM:
            return DatagramSocket(s)
        elif socktype == socket.SOCK_STREAM:
            stream = trio.SocketStream(s)
            tls = False
            if ssl_context:
                tls = True
                try:
                    stream = trio.SSLStream(
                        stream, ssl_context, server_hostname=server_hostname
                    )
                except Exception:  # pragma: no cover
                    await stream.aclose()
                    raise
            return StreamSocket(af, stream, tls)
        raise NotImplementedError(
            "unsupported socket " + f"type {socktype}"
        )  # pragma: no cover

async def sleep(self, interval):
        await trio.sleep(interval)

def get_transport_class(self):
        return _HTTPTransport

async def wait_for(self, awaitable, timeout):
        with _maybe_timeout(timeout):
            return await awaitable
        raise dns.exception.Timeout(
            timeout=timeout
        )  # pragma: no cover  lgtm[py/unreachable-statement]

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Editing: _trio_backend.py

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