From 7a32616407c702b0aac4e5e7aff0f6a6e36e9c40 Mon Sep 17 00:00:00 2001
From: benoitc <bchesneau@gmail.com>
Date: Tue, 15 May 2012 00:13:48 +0200
Subject: [PATCH] fixes gevent websocket example . close #343

---
 examples/websocket/gevent_websocket.py | 55 +++++++++++++++++++++-----
 1 file changed, 45 insertions(+), 10 deletions(-)

diff --git a/examples/websocket/gevent_websocket.py b/examples/websocket/gevent_websocket.py
index 4e7b3483..64b5fb37 100644
--- a/examples/websocket/gevent_websocket.py
+++ b/examples/websocket/gevent_websocket.py
@@ -10,6 +10,7 @@ import struct
 import logging
 from socket import error as SocketError
 
+import gevent
 from gunicorn.workers.async import ALREADY_HANDLED
 
 logger = logging.getLogger(__name__)
@@ -85,8 +86,8 @@ class WebSocketWSGI(object):
                 "Sec-WebSocket-Version: %s\r\n"
                 "Sec-WebSocket-Accept: %s\r\n\r\n"
                  % (
-                    environ.get('HTTP_ORIGIN'), 
-                    environ.get('HTTP_HOST'), 
+                    environ.get('HTTP_ORIGIN'),
+                    environ.get('HTTP_HOST'),
                     ws.path,
                     version,
                     base64.b64encode(sha1(key + WS_KEY).digest())
@@ -97,8 +98,8 @@ class WebSocketWSGI(object):
             handshake_reply += (
                        "WebSocket-Origin: %s\r\n"
                        "WebSocket-Location: ws://%s%s\r\n\r\n" % (
-                            environ.get('HTTP_ORIGIN'), 
-                            environ.get('HTTP_HOST'), 
+                            environ.get('HTTP_ORIGIN'),
+                            environ.get('HTTP_HOST'),
                             ws.path))
 
         sock.sendall(handshake_reply)
@@ -192,7 +193,7 @@ class WebSocket(object):
         """
 
         f = {'fin'          : 0,
-             'opcode'       : 0,   
+             'opcode'       : 0,
              'mask'         : 0,
              'hlen'         : 2,
              'length'       : 0,
@@ -341,10 +342,10 @@ class WebSocket(object):
                     raise ValueError("Don't understand how to parse this type of message: %r" % buf)
         self._buf = buf
         return msgs
-    
+
     def send(self, message):
-        """Send a message to the browser.  
-        
+        """Send a message to the browser.
+
         *message* should be convertable to a string; unicode objects should be
         encodable as utf-8.  Raises socket.error with errno of 32
         (broken pipe) if the socket has already been closed by the client."""
@@ -362,8 +363,8 @@ class WebSocket(object):
             #self._sendlock.release()
 
     def wait(self):
-        """Waits for and deserializes messages. 
-        
+        """Waits for and deserializes messages.
+
         Returns a single message; the oldest not yet processed. If the client
         has already closed the connection, returns None.  This is different
         from normal socket behavior because the empty string is a valid
@@ -408,3 +409,37 @@ class WebSocket(object):
         self._send_closing_frame()
         self.socket.shutdown(True)
         self.socket.close()
+
+
+# demo app
+import os
+import random
+def handle(ws):
+    """  This is the websocket handler function.  Note that we
+    can dispatch based on path in here, too."""
+    if ws.path == '/echo':
+        while True:
+            m = ws.wait()
+            if m is None:
+                break
+            ws.send(m)
+
+    elif ws.path == '/data':
+        for i in xrange(10000):
+            ws.send("0 %s %s\n" % (i, random.random()))
+            gevent.sleep(0.1)
+
+wsapp = WebSocketWSGI(handle)
+def app(environ, start_response):
+    """ This resolves to the web page or the websocket depending on
+    the path."""
+    if environ['PATH_INFO'] == '/' or environ['PATH_INFO'] == "":
+        data = open(os.path.join(
+                     os.path.dirname(__file__),
+                     'websocket.html')).read()
+        data = data % environ
+        start_response('200 OK', [('Content-Type', 'text/html'),
+                                 ('Content-Length', len(data))])
+        return [data]
+    else:
+        return wsapp(environ, start_response)