这个和async_hello2.py重复了

samples/async/async_wget2.py

@@ -1,15 +1,26 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-import threading
 import asyncio
 
-async def hello():
-    print('Hello world! (%s)' % threading.currentThread())
-    await asyncio.sleep(1)
-    print('Hello again! (%s)' % threading.currentThread())
+import asyncio
+
+async def wget(host):
+    print('wget %s...' % host)
+    connect = asyncio.open_connection(host, 80)
+    reader, writer = await connect
+    header = 'GET / HTTP/1.0\r\nHost: %s\r\n\r\n' % host
+    writer.write(header.encode('utf-8'))
+    await writer.drain()
+    while True:
+        line = await reader.readline()
+        if line == b'\r\n':
+            break
+        print('%s header > %s' % (host, line.decode('utf-8').rstrip()))
+    # Ignore the body, close the socket
+    writer.close()
 
 loop = asyncio.get_event_loop()
-tasks = [hello(), hello()]
+tasks = [wget(host) for host in ['www.sina.com.cn', 'www.sohu.com', 'www.163.com']]
 loop.run_until_complete(asyncio.wait(tasks))
 loop.close()