def ssl_wrap_socket(schannel, address, options=None, remote_host=None):
# Wrap the socket using the Pyhton SSL socket library
schannel._socket = ssl_wrap_socket(
socket=schannel._socket,
ssl_options=options,
server_hostname=remote_host,
do_handshake_on_connect=False)
def _handle_connection(self, connection, address):
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
if err.args[0] == errno.ECONNABORTED:
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection, io_loop=self.io_loop)
else:
stream = IOStream(connection, io_loop=self.io_loop)
self.handle_stream(stream, address)
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
if err.args[0] == errno.ECONNABORTED:
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection, io_loop=self.io_loop)
else:
stream = IOStream(connection, io_loop=self.io_loop)
self.handle_stream(stream, address)
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _make_server_iostream(self, connection, **kwargs):
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
context.load_cert_chain(
os.path.join(os.path.dirname(__file__), "test.crt"), os.path.join(os.path.dirname(__file__), "test.key")
)
connection = ssl_wrap_socket(connection, context, server_side=True, do_handshake_on_connect=False)
return SSLIOStream(connection, io_loop=self.io_loop, **kwargs)
def _make_server_iostream(self, connection, **kwargs):
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
context.load_cert_chain(
os.path.join(os.path.dirname(__file__), 'test.crt'),
os.path.join(os.path.dirname(__file__), 'test.key'))
connection = ssl_wrap_socket(connection, context,
server_side=True,
do_handshake_on_connect=False)
return SSLIOStream(connection, io_loop=self.io_loop, **kwargs)
def _handle_connect(self):
# When the connection is complete, wrap the socket for SSL
# traffic. Note that we do this by overriding _handle_connect
# instead of by passing a callback to super().connect because
# user callbacks are enqueued asynchronously on the IOLoop,
# but since _handle_events calls _handle_connect immediately
# followed by _handle_write we need this to be synchronous.
self.socket = ssl_wrap_socket(self.socket, self._ssl_options,
server_hostname=self._server_hostname,
do_handshake_on_connect=False)
super(SSLIOStream, self)._handle_connect()
def _make_server_iostream(self, connection, **kwargs):
context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
context.load_cert_chain(
os.path.join(os.path.dirname(__file__), "test.crt"),
os.path.join(os.path.dirname(__file__), "test.key"),
)
connection = ssl_wrap_socket(connection,
context,
server_side=True,
do_handshake_on_connect=False)
return SSLIOStream(connection, **kwargs)
def _handle_connect(self):
# When the connection is complete, wrap the socket for SSL
# traffic. Note that we do this by overriding _handle_connect
# instead of by passing a callback to super().connect because
# user callbacks are enqueued asynchronously on the IOLoop,
# but since _handle_events calls _handle_connect immediately
# followed by _handle_write we need this to be synchronous.
self.socket = ssl_wrap_socket(self.socket, self._ssl_options,
server_hostname=self._server_hostname,
do_handshake_on_connect=False)
super(SSLIOStream, self)._handle_connect()
def _handle_connection(self, connection: socket.socket, address: Any) -> None:
# 此处获取到的是sock.accept() 返回的两个数据, 也就是request和address嘛
# 每当有用户建立连接, 都会进入此处
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(
connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False,
)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/tornadoweb/tornado/pull/750
if errno_from_exception(err) in (errno.ECONNABORTED, errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
) # type: IOStream
else:
stream = IOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
)
future = self.handle_stream(stream, address) # 会注册一个未来对象到loop里面
if future is not None: # 也就是说一个http连接到了这之后接结束了, 剩下的事都在loop中
IOLoop.current().add_future(
gen.convert_yielded(future), lambda f: f.result()
)
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection: socket.socket, address: Any) -> None:
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(
connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False,
)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/tornadoweb/tornado/pull/750
if errno_from_exception(err) in (errno.ECONNABORTED, errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
) # type: IOStream
else:
stream = IOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
)
future = self.handle_stream(stream, address)
if future is not None:
IOLoop.current().add_future(
gen.convert_yielded(future), lambda f: f.result()
)
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
# Copy-paste of tornado.httpserver.HTTPServer._handle_connection to use
# our custom stream class.
#
# Actually, connection is just a socket.
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/tornadoweb/tornado/pull/750
if errno_from_exception(err) in (errno.ECONNABORTED, errno.EINVAL): # noqa
return connection.close()
else:
raise
try:
io_loop = self.io_loop
kw = dict(io_loop=io_loop)
except AttributeError:
# We are on Tornado 5+. Just don't pass ioloop
kw = {}
io_loop = IOLoop.current()
try:
stream = EasySSLIOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
**kw
)
future = self.handle_stream(stream, address)
if future is not None:
io_loop.add_future(future, lambda f: f.result())
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
# 如果可以的话，启用ssl
# address = ('127.0.0.1', 63959)
# connection : socket object
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/tornadoweb/tornado/pull/750
if errno_from_exception(err) in (errno.ECONNABORTED,
errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size)
else:
# 根据connection获得一个IOStream的对象，便于数据的读取
stream = IOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size)
# 开始处理进来的数据连接
self.handle_stream(stream, address)
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
# 如果可以的话，启用ssl
# address = ('127.0.0.1', 63959)
# connection : socket object
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/tornadoweb/tornado/pull/750
if errno_from_exception(err) in (errno.ECONNABORTED, errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection, io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size)
else:
# 根据connection获得一个IOStream的对象，便于数据的读取
stream = IOStream(connection, io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size)
# 开始处理进来的数据连接
self.handle_stream(stream, address)
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connect(self):
# When the connection is complete, wrap the socket for SSL
# traffic. Note that we do this by overriding _handle_connect
# instead of by passing a callback to super().connect because
# user callbacks are enqueued asynchronously on the IOLoop,
# but since _handle_events calls _handle_connect immediately
# followed by _handle_write we need this to be synchronous.
#
# The IOLoop will get confused if we swap out self.socket while the
# fd is registered, so remove it now and re-register after
# wrap_socket().
self.io_loop.remove_handler(self.socket)
old_state = self._state
self._state = None
self.socket = ssl_wrap_socket(self.socket, self._ssl_options,
server_hostname=self._server_hostname,
do_handshake_on_connect=False)
self._add_io_state(old_state)
super(SSLIOStream, self)._handle_connect()
def _handle_connect(self):
# When the connection is complete, wrap the socket for SSL
# traffic. Note that we do this by overriding _handle_connect
# instead of by passing a callback to super().connect because
# user callbacks are enqueued asynchronously on the IOLoop,
# but since _handle_events calls _handle_connect immediately
# followed by _handle_write we need this to be synchronous.
#
# The IOLoop will get confused if we swap out self.socket while the
# fd is registered, so remove it now and re-register after
# wrap_socket().
self.io_loop.remove_handler(self.socket)
old_state = self._state
self._state = None
self.socket = ssl_wrap_socket(self.socket, self._ssl_options,
server_hostname=self._server_hostname,
do_handshake_on_connect=False)
self._add_io_state(old_state)
super(SSLIOStream, self)._handle_connect()
def _handle_connection(self, connection, address):
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/facebook/tornado/pull/750
if err.args[0] in (errno.ECONNABORTED, errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size)
else:
stream = IOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size)
self.handle_stream(stream, address)
# 这个_handle_conntion基本是用在底层iostream的处理上面，
# 而路由的分发，我猜测应该是在生成request对象那个时候才开始的
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/facebook/tornado/pull/750
if err.args[0] in (errno.ECONNABORTED, errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection, io_loop=self.io_loop, max_buffer_size=self.max_buffer_size)
else:
stream = IOStream(connection, io_loop=self.io_loop, max_buffer_size=self.max_buffer_size)
self.handle_stream(stream, address)
# 这个_handle_conntion基本是用在底层iostream的处理上面，
# 而路由的分发，我猜测应该是在生成request对象那个时候才开始的
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
if errno_from_exception(err) in (errno.ECONNABORTED,
errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size)
else:
stream = IOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size)
future = self.handle_stream(stream, address)
if future is not None:
self.io_loop.add_future(future, lambda f: f.result())
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def _handle_connection(self, connection, address):
# _handle_connection就比较简单了，跳过那些ssl的处理，简化为两句：
# stream = IOStream(connection, io_loop=self.io_loop)和
# self.handle_stream()。
# 这里IOStream代表了【IO层】(也就是读写方面的东西)，以后再说，反正读写是不愁了。
# 接着是调用handle_stream。我们可以看到，不论应用层是什么协议
# （或者自定义协议），当有新连接到来时走的流程是差不多的，都要经历一番上诉的回调，
# 不同之处就在于这个handle_stream方法。这个方法是由【子类自定义覆盖的】，
# 它的HTTP实现已经在上一节看过了。
#
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/facebook/tornado/pull/750
if err.args[0] in (errno.ECONNABORTED, errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size)
else:
stream = IOStream(connection,
io_loop=self.io_loop,
max_buffer_size=self.max_buffer_size)
# 调用handle_stream，传入创建的IOStream对象初始化一个HTTPConnection对象，
# HTTPConnection封装了IOStream的一些操作，用于处理HTTPRequest并返回。
# 1.1.0 中的写法：
# ====important=====#
# HTTPConnection(stream, address, self.request_callback, self.no_keep_alive, self.xheaders)
self.handle_stream(stream, address)
# 思路是很清晰的，客户端连接在这里被转化成一个IOStream。然后由handle_stream函数处理。
# 这个handle_stream就是我们前面提到过的未直接实现的接口，它是由HTTPServer类实现的。
# def handle_stream(self, stream, address):
# HTTPConnection(stream, address, self.request_callback,
# self.no_keep_alive, self.xheaders, self.protocol)
# 最后，处理流程又回到了HTTPServer类中。可以预见，在HTTConnection这个类中，
# stream将和我们注册的RequestHandler协作，一边读客户端请求，一边调用相应的handler处理。
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def ssl_wrap_socket(schannel, address, options=None, remote_host=None):
# Wrap the socket using the Pyhton SSL socket library
schannel._socket = ssl_wrap_socket(socket=schannel._socket,
ssl_options=options,
server_hostname=remote_host,
do_handshake_on_connect=False)