client/server implementation ## • Asynchronous networking tornado.io loop — Main event loop ☐ tornado.iostream — Convenient wrappers for non-blocking sockets ☐ tornado.netutil — Miscellaneous network utilities events ■ Callbacks and timeouts ■ Debugging and error handling ■ Methods for subclasses • tornado.iostream — Convenient wrappers for non-blocking sockets ○ Base class ■ Main interface ■ Methods for IOLoop subclasses and should not generally be used by application code. New in version 4.0. # tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking

bool Returns True if this PeriodicCallback has been started. New in version 4.1. ##### 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking connect. A very simple (and broken) HTTP client using this class: import tornado.ioloop import tornado.iostream import socket async def main(): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError class EchoServer(TCPServer): async def handle_stream(self, stream

simple TCP server: import asyncio import errno import functools import socket import tornado from tornado.iostream import IOStream async def handle_connection(connection, address): stream = IOStream(connection) is_running() → bool Returns True if this PeriodicCallback has been started. Added in version 4.1. 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError class EchoServer(TCPServer): async def handle_stream(self, stream,

TCP server: import asyncio import errno import functools import socket import tornado from tornado.iostream import IOSream async def handle_connection(connection, address): stream = IOSream(connection) bool Returns True if this PeriodicCallback has been started. New in version 4.1. ##### 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError class EchoServer(TCPServer): async def handle_stream(self, stream

TCP server: import asyncio import errno import functools import socket import tornado from tornado.iostream import IOSream async def handle_connection(connection, address): stream = IOSream(connection) bool Returns True if this PeriodicCallback has been started. New in version 4.1. ##### 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError class EchoServer(TCPServer): async def handle_stream(self, stream

TCP server: import asyncio import errno import functools import socket import tornado from tornado.iostream import IOSream async def handle_connection(connection, address): stream = IOSream(connection) bool Returns True if this PeriodicCallback has been started. New in version 4.1. ##### 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError class EchoServer(TCPServer): async def handle_stream(self, stream

TCP server: import asyncio import errno import functools import socket import tornado from tornado.iostream import IOSream async def handle_connection(connection, address): stream = IOSream(connection) bool Returns True if this PeriodicCallback has been started. New in version 4.1. ##### 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError class EchoServer(TCPServer): async def handle_stream(self, stream

client/server implementation • Asynchronous networking • tornado.io loop — Main event loop tornado.iostream — Convenient wrappers for non-blocking sockets ☐ tornado.netutil — Miscellaneous network utilities events ■ Callbacks and timeouts Debugging and error handling ■ Methods for subclasses • tornado.iostream — Convenient wrappers for non-blocking sockets ○ Base class ■ Main interface ■ Methods for IOLoop subclasses and should not generally be used by application code. New in version 4.0. # tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking

subclasses and should not generally be used by application code. New in version 4.0. ##### 5.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError from tornado import gen class EchoServer(TCPServer): async def asynchronous library that doesn’t rely on a stack_context-aware library like tornado.ioloop or tornado.iostream (for example, if you’re writing a thread pool), use stack_context.wrap() before any asynchronous

bool Returns True if this PeriodicCallback has been started. New in version 4.1. ##### 6.4.2 tornado.iostream — Convenient wrappers for non-blocking sockets Utility classes to write to and read from non-blocking simple echo server could be defined like this: from tornado.tcpserver import TCPServer from tornado.iostream import StreamClosedError from tornado import gen class EchoServer(TCPServer): async def now faster. • parse_body_arguments now accepts incompletely-escaped non-ASCII inputs. ### tornado.iostream • ssl.CertificateError during the SSL handshake is now handled correctly. • Reads that are