add websocket example

examples/websocket/client.py

@@ -0,0 +1,32 @@
+import asyncio
+import aiohttp
+
+
+def req1():
+    with aiohttp.MultipartWriter() as writer:
+        writer.append('test')
+        writer.append_json({'passed': True})
+
+    resp = yield from aiohttp.request(
+        "post", 'http://localhost:8080/multipart',
+        data=writer, headers=writer.headers)
+    print(resp)
+    assert 200 == resp.status
+
+
+def req2():
+    with aiohttp.MultipartWriter() as writer:
+        writer.append('test')
+        writer.append_json({'passed': True})
+        writer.append(open('src/main.rs'))
+
+    resp = yield from aiohttp.request(
+        "post", 'http://localhost:8080/multipart',
+        data=writer, headers=writer.headers)
+    print(resp)
+    assert 200 == resp.status
+
+
+loop = asyncio.get_event_loop()
+loop.run_until_complete(req1())
+loop.run_until_complete(req2())