Python 使用asyncio与其他对等方连接时如何处理ConnectionRefusedError_Python_Python 3.x_P2p_Bittorrent_Python Asyncio

Python 使用asyncio与其他对等方连接时如何处理ConnectionRefusedError

python python-3.x

Python 使用asyncio与其他对等方连接时如何处理ConnectionRefusedError,python,python-3.x,p2p,bittorrent,python-asyncio,Python,Python 3.x,P2p,Bittorrent,Python Asyncio,我使用asyncio与我正在使用的bittorrent客户端中的其他对等方进行连接。当某些对等机无法连接时，程序崩溃，出现ConnectionRefusedError和TimeoutError异常。有些同龄人无法连接是正常的还是我的代码有问题。如果这是正常的，我应该如何处理异常？我试着在循环中放置try-except。创建连接（），但没有任何效果这是我的密码： class Torrent(): def __init__(self, torrent_file, loop):

我使用

asyncio

与我正在使用的bittorrent客户端中的其他对等方进行连接。当某些对等机无法连接时，程序崩溃，出现

ConnectionRefusedError

和

TimeoutError

异常。有些同龄人无法连接是正常的还是我的代码有问题。如果这是正常的，我应该如何处理异常？我试着在

循环中放置try-except
。创建连接（）

，但没有任何效果

这是我的密码：

class Torrent():
    def __init__(self, torrent_file, loop):
        self.torrent = Torrent(torrent_file)
        self.peers = self.get_peers()
        self.loop = loop

    ...

    def connect_to_peers(self):
        tasks = []
        for peer in self.peers:
            try:
                # returns a coroutine
                connection = self.loop.create_connection(PeerProtocol, peer['host'], peer['port'])
                tasks.append(asyncio.Task(connection))
            except ConnectionRefusedError:
                print('caught')
            except TimeoutError:
                print('timeout error')

        return tasks


def main():
    loop = asyncio.get_event_loop()

    filename = 'street-fighter.torrent'
    client = TorrentClient(filename, loop)
    tasks = client.connect_to_peers()

    try:
        loop.run_until_complete(asyncio.wait(tasks))
    except KeyboardInterrupt:
        pass

class PeerProtocol(asyncio.Protocol):

    def connection_made(self, transport):
        host, port = transport.get_extra_info('peername')
        print('connected with {}:{}'.format(host, port))

    def connection_lost(self, exc):
        print('disconnected...')
        print('exc: {}'.format(exc))

以下是输出：

connected with 80.94.76.7:14122
connected with 174.110.236.233:45308
connected with 78.177.119.170:27311
connected with 95.15.59.242:21426
disconnected...
exc: [Errno 54] Connection reset by peer
disconnected...
exc: [Errno 54] Connection reset by peer
disconnected...
exc: None
disconnected...
exc: None
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('93.34.49.17', 13311)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('93.34.49.17', 13311)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('197.29.6.31', 50735)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('197.29.6.31', 50735)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('195.174.165.47', 61567)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('195.174.165.47', 61567)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=ConnectionRefusedError(61, "Connect call failed ('69.122.194.81', 6881)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
ConnectionRefusedError: [Errno 61] Connect call failed ('69.122.194.81', 6881)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('41.210.123.12', 48319)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('41.210.123.12', 48319)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('78.174.159.195', 35414)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('78.174.159.195', 35414)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('85.103.126.106', 22665)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('85.103.126.106', 22665)
Task exception was never retrieved
future: <Task finished coro=<BaseEventLoop.create_connection() done, defined at /Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py:548> exception=TimeoutError(60, "Connect call failed ('81.228.224.142', 13570)")>
Traceback (most recent call last):
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 241, in _step
    result = coro.throw(exc)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 645, in create_connection
    raise exceptions[0]
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py", line 632, in create_connection
    yield from self.sock_connect(sock, address)
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 358, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 290, in _wakeup
    future.result()
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector_events.py", line 436, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
TimeoutError: [Errno 60] Connect call failed ('81.228.224.142', 13570)

与80.94.76.7:14122连接
接174.110.236.233:45308
接78.177.119.170:27311
接95.15.59.242:21426
断开的。。。
exc:[Errno 54]对等方重置连接
断开的。。。
exc:[Errno 54]对等方重置连接
断开的。。。
行政长官：没有
断开的。。。
行政长官：没有
从未检索到任务异常
未来：
回溯（最近一次呼叫最后一次）：
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第241行，步骤
结果=核心投掷（exc）
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base\u events.py”，第645行，在create\u connection中
引发异常[0]
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py”，第632行，在create_connection中
self.sock\u connect（sock，地址）的收益
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第358行，在__
屈服自我——这告诉任务等待完成。
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第290行，在唤醒中
future.result（）
结果中的文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第274行
提出自己的意见
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector\u events.py”，第436行，在sock\u connect\u cb中
引发操作错误（错误，“连接调用失败%s%”（地址，）
TimeoutError:[Errno 60]连接调用失败（'93.34.49.17'，13311）
从未检索到任务异常
未来：
回溯（最近一次呼叫最后一次）：
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第241行，步骤
结果=核心投掷（exc）
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base\u events.py”，第645行，在create\u connection中
引发异常[0]
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py”，第632行，在create_connection中
self.sock\u connect（sock，地址）的收益
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第358行，在__
屈服自我——这告诉任务等待完成。
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第290行，在唤醒中
future.result（）
结果中的文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第274行
提出自己的意见
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector\u events.py”，第436行，在sock\u connect\u cb中
引发操作错误（错误，“连接调用失败%s%”（地址，）
TimeoutError:[Errno 60]连接调用失败（'197.29.6.31'，50735）
从未检索到任务异常
未来：
回溯（最近一次呼叫最后一次）：
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第241行，步骤
结果=核心投掷（exc）
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base\u events.py”，第645行，在create\u connection中
引发异常[0]
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py”，第632行，在create_connection中
self.sock\u connect（sock，地址）的收益
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第358行，在__
屈服自我——这告诉任务等待完成。
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第290行，在唤醒中
future.result（）
结果中的文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第274行
提出自己的意见
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector\u events.py”，第436行，在sock\u connect\u cb中
引发操作错误（错误，“连接调用失败%s%”（地址，）
TimeoutError:[Errno 60]连接调用失败（'195.174.165.47'，61567）
从未检索到任务异常
未来：
回溯（最近一次呼叫最后一次）：
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第241行，步骤
结果=核心投掷（exc）
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base\u events.py”，第645行，在create\u connection中
引发异常[0]
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.py”，第632行，在create_connection中
self.sock\u connect（sock，地址）的收益
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第358行，在__
屈服自我——这告诉任务等待完成。
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第290行，在唤醒中
future.result（）
结果中的文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py”，第274行
提出自己的意见
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/selector\u events.py”，第436行，在sock\u connect\u cb中
引发操作错误（错误，“连接调用失败%s%”（地址，）
ConnectionRefusedError:[Errno 61]连接调用失败（'69.122.194.81'，6881）
从未检索到任务异常
未来：
回溯（最近一次呼叫最后一次）：
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py”，第241行，步骤
结果=核心投掷（exc）
文件“/Users/shangsunset/.pyenv/versions/3.5.1/lib/python3.5/asyncio/base_events.p
class Torrent():

    # ...

    async def connect_to_peer(self, peer):
        try:
            # await, here exception would be raised
            await self.loop.create_connection(
                PeerProtocol, 
                peer['host'], 
                peer['port']
            )
        except ConnectionRefusedError:
            print('caught')
        except TimeoutError:
            print('timeout error')


    async def connect_to_peers(self):  # async function
        await asyncio.gather(
            *[self.connect_to_peer(peer) for peer in self.peers], 
            loop=self.loop  # fixed here!
        )
        # Btw, you can add param return_exceptions=True to get exceptions
        # in results here instead of ignoring it inside connect_to_peer

# ...

loop.run_until_complete(client.connect_to_peers())