change: BytesIO to socket for asyncio

select allow only socket on Windows

README.md

@@ -13,6 +13,7 @@ Features
 * UDP hole punching
 * high performance (4Mbps/s Up&Down when 10mb)
 * ipv4/ipv6
+* optional asyncio
 
 Requirement
 ----
@@ -59,6 +60,40 @@ print("closed", sock)
 ```
 Another side, receive the message and show immediately.
 
+asyncio usage
+----
+```python
+from srudp import SecureReliableSocket
+import asyncio
+
+# Get a reference to the current event loop
+loop = asyncio.get_event_loop()
+
+# create a socket
+sock = SecureReliableSocket()
+
+# connect() on another thread because block event loop
+address = ("example.com", 3000)
+await loop.run_in_executor(None, sock.connect, (address,))
+
+# Register the open socket to wait for data
+reader, writer = await asyncio.open_connection(sock=sock)
+
+# read
+data = await reader.read(1024)
+
+# write
+writer.write(b"hello")
+writer.write(b"world")
+await writer.drain()
+
+# close
+writer.close()
+```
+You can do just like a normal TCP socket.
+But if you don't intend, like HTTP protocol which requires a lot of connections,
+you don't have to use async method.
+
 to avoid troubles
 ----
 * Do not think **always success connection  establish**.

setup.py

@@ -35,6 +35,7 @@
     classifiers=[
         'Typing :: Typed',
         'Topic :: Internet',
+        'Framework :: AsyncIO',
         'Topic :: System :: Networking',
         'Development Status :: 3 - Alpha',
         'Programming Language :: Python :: 3',