upgrade to 14.4.1upstream/14.4.1

1 files changed, 46 insertions, 0 deletions

diff --git a/examples/eventloop/web.py b/examples/eventloop/web.py
new file mode 100644
index 0000000..1285f95
--- /dev/null
+++ b/examples/eventloop/web.py
@@ -0,0 +1,46 @@
+import zmq
+from zmq.eventloop import ioloop, zmqstream
+
+"""
+ioloop.install() must be called prior to instantiating *any* tornado objects,
+and ideally before importing anything from tornado, just to be safe.
+
+install() sets the singleton instance of tornado.ioloop.IOLoop with zmq's
+IOLoop. If this is not done properly, multiple IOLoop instances may be
+created, which will have the effect of some subset of handlers never being
+called, because only one loop will be running.
+"""
+
+ioloop.install()
+
+import tornado
+import tornado.web
+
+
+"""
+this application can be used with echostream.py, start echostream.py,
+start web.py, then every time you hit http://localhost:8888/,
+echostream.py will print out 'hello'
+"""
+
+def printer(msg):
+    print (msg)
+
+ctx = zmq.Context()
+s = ctx.socket(zmq.REQ)
+s.connect('tcp://127.0.0.1:5555')
+stream = zmqstream.ZMQStream(s)
+stream.on_recv(printer)
+
+class TestHandler(tornado.web.RequestHandler):
+    def get(self):
+        print ("sending hello")
+        stream.send("hello")
+        self.write("hello")
+application = tornado.web.Application([(r"/", TestHandler)])
+
+if __name__ == "__main__":
+    application.listen(8888)
+    ioloop.IOLoop.instance().start()
+
+