sending chunks of data using webob - wsgi

Question

I tried to write a simple server-client program using webob.
1. The client send data using 'Transfer-Encoding', 'chunked'
2. the received data is then print in the server side.
The Server.py received the data correctly.
However, I got error a bunch of message from webob.
However, anyone kindly tell me what had happened or just
give a simple guide line for write such a simple program(sending chunk) with webob.
thanks!
the codes and error are as below:
server.py
from webob import Request
from webob import Response
class ChunkApp(object):
def __init__(self):
pass
def __call__(self, environ, start_response):
req = Request(environ)
for buf in self.chunkreadable(req.body_file, 65535):
print buf
resp = Response('chunk received')
return resp(environ, start_response)
def chunkreadable(self, iter, chunk_size=65536):
return self.chunkiter(iter, chunk_size) if \
hasattr(iter, 'read') else iter
def chunkiter(self, fp, chunk_size=65536):
while True:
chunk = fp.read(chunk_size)
if chunk:
yield chunk
else:
break
if __name__ == '__main__':
app = ChunkApp()
from wsgiref.simple_server import make_server
httpd = make_server('localhost', 8080, app)
print 'Serving on http://localhost:%s' % '8080'
try:
httpd.serve_forever()
except KeyboardInterrupt:
print '^C'
client.py
from httplib import HTTPConnection
conn = HTTPConnection("localhost:8080")
conn.putrequest('PUT', "/")
body = "1234567890"
conn.putheader('Transfer-Encoding', 'chunked')
conn.endheaders()
for chunk in body:
#print '%x\r\n%s\r\n' % (len(chunk), chunk)
conn.send('%x\r\n%s\r\n' % (len(chunk), chunk))
conn.send('0\r\n\r\n')
Error
Traceback (most recent call last):
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 86, in run
self.finish_response()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 127, in finish_response
self.write(data)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 210, in write
self.send_headers()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 268, in send_headers
self.send_preamble()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 192, in send_preamble
'Date: %s\r\n' % format_date_time(time.time())
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 324, in write
self.flush()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 303, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 52575)
Traceback (most recent call last):
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 284, in _handle_request_noblock
self.process_request(request, client_address)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 310, in process_request
self.finish_request(request, client_address)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 323, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 641, in __init__
self.finish()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 694, in finish
self.wfile.flush()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 303, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe