def mongrel2_handler(application, conn, debug=False):
"""
Based on :
https://github.com/berry/Mongrel2-WSGI-Handler/blob/master/wsgi-handler.py
WSGI handler based on the Python wsgiref SimpleHandler.
A WSGI application should return a iterable op StringTypes.
Any encoding must be handled by the WSGI application itself.
"""
from wsgiref.handlers import SimpleHandler
try:
import cStringIO as StringIO
except:
import StringIO
# TODO - this wsgi handler executes the application and renders a page
# in memory completely before returning it as a response to the client.
# Thus, it does not "stream" the result back to the client. It should be
# possible though. The SimpleHandler accepts file-like stream objects. So,
# it should be just a matter of connecting 0MQ requests/response streams to
# the SimpleHandler requests and response streams. However, the Python API
# for Mongrel2 doesn't seem to support file-like stream objects for requests
# and responses. Unless I have missed something.
while True:
if debug:
print "WAITING FOR REQUEST"
# receive a request
req = conn.recv()
if debug:
print "REQUEST BODY: %r\n" % req.body
if req.is_disconnect():
if debug:
print "DISCONNECT"
continue # effectively ignore the disconnect from the client
# Set a couple of environment attributes a.k.a. header attributes
# that are a must according to PEP 333
environ = req.headers
environ[
'SERVER_PROTOCOL'] = 'HTTP/1.1' # SimpleHandler expects a server_protocol, lets assume it is HTTP 1.1
environ['REQUEST_METHOD'] = environ['METHOD']
if ':' in environ['Host']:
environ['SERVER_NAME'] = environ['Host'].split(':')[0]
environ['SERVER_PORT'] = environ['Host'].split(':')[1]
else:
environ['SERVER_NAME'] = environ['Host']
environ['SERVER_PORT'] = ''
environ['SCRIPT_NAME'] = '' # empty for now
environ['PATH_INFO'] = urllib.unquote(environ['PATH'])
if '?' in environ['URI']:
environ['QUERY_STRING'] = environ['URI'].split('?')[1]
else:
environ['QUERY_STRING'] = ''
if 'Content-Length' in environ:
environ['CONTENT_LENGTH'] = environ[
'Content-Length'] # necessary for POST to work with Django
environ['wsgi.input'] = req.body
if debug:
print "ENVIRON: %r\n" % environ
# SimpleHandler needs file-like stream objects for
# requests, errors and responses
reqIO = StringIO.StringIO(req.body)
errIO = StringIO.StringIO()
respIO = StringIO.StringIO()
# execute the application
handler = SimpleHandler(reqIO,
respIO,
errIO,
environ,
multithread=False,
multiprocess=False)
handler.run(application)
# Get the response and filter out the response (=data) itself,
# the response headers,
# the response status code and the response status description
response = respIO.getvalue()
response = response.split("\r\n")
data = response[-1]
headers = dict([r.split(": ") for r in response[1:-2]])
code = response[0][9:12]
status = response[0][13:]
# strip BOM's from response data
# Especially the WSGI handler from Django seems to generate them (2 actually, huh?)
# a BOM isn't really necessary and cause HTML parsing errors in Chrome and Safari
# See also: http://www.xs4all.nl/~mechiel/projects/bomstrip/
# Although I still find this a ugly hack, it does work.
data = data.replace('\xef\xbb\xbf', '')
# Get the generated errors
errors = errIO.getvalue()
# return the response
if debug:
print "RESPONSE: %r\n" % response
if errors:
if debug:
print "ERRORS: %r" % errors
data = "%s\r\n\r\n%s" % (data, errors)
conn.reply_http(req, data, code=code, status=status, headers=headers)
def mongrel2_handler(application, conn, debug=False):
"""
Based on :
https://github.com/berry/Mongrel2-WSGI-Handler/blob/master/wsgi-handler.py
WSGI handler based on the Python wsgiref SimpleHandler.
A WSGI application should return a iterable op StringTypes.
Any encoding must be handled by the WSGI application itself.
"""
from wsgiref.handlers import SimpleHandler
try:
import cStringIO as StringIO
except:
import StringIO
# TODO - this wsgi handler executes the application and renders a page
# in memory completely before returning it as a response to the client.
# Thus, it does not "stream" the result back to the client. It should be
# possible though. The SimpleHandler accepts file-like stream objects. So,
# it should be just a matter of connecting 0MQ requests/response streams to
# the SimpleHandler requests and response streams. However, the Python API
# for Mongrel2 doesn't seem to support file-like stream objects for requests
# and responses. Unless I have missed something.
while True:
if debug:
print("WAITING FOR REQUEST")
# receive a request
req = conn.recv()
if debug:
print("REQUEST BODY: %r\n" % req.body)
if req.is_disconnect():
if debug:
print("DISCONNECT")
continue # effectively ignore the disconnect from the client
# Set a couple of environment attributes a.k.a. header attributes
# that are a must according to PEP 333
environ = req.headers
environ['SERVER_PROTOCOL'] = 'HTTP/1.1' # SimpleHandler expects a server_protocol, lets assume it is HTTP 1.1
environ['REQUEST_METHOD'] = environ['METHOD']
if ':' in environ['Host']:
environ['SERVER_NAME'] = environ['Host'].split(':')[0]
environ['SERVER_PORT'] = environ['Host'].split(':')[1]
else:
environ['SERVER_NAME'] = environ['Host']
environ['SERVER_PORT'] = ''
environ['SCRIPT_NAME'] = '' # empty for now
environ['PATH_INFO'] = urllib.unquote(environ['PATH'])
if '?' in environ['URI']:
environ['QUERY_STRING'] = environ['URI'].split('?')[1]
else:
environ['QUERY_STRING'] = ''
if 'Content-Length' in environ:
environ['CONTENT_LENGTH'] = environ[
'Content-Length'] # necessary for POST to work with Django
environ['wsgi.input'] = req.body
if debug:
print("ENVIRON: %r\n" % environ)
# SimpleHandler needs file-like stream objects for
# requests, errors and responses
reqIO = StringIO.StringIO(req.body)
errIO = StringIO.StringIO()
respIO = StringIO.StringIO()
# execute the application
handler = SimpleHandler(reqIO, respIO, errIO, environ,
multithread=False, multiprocess=False)
handler.run(application)
# Get the response and filter out the response (=data) itself,
# the response headers,
# the response status code and the response status description
response = respIO.getvalue()
response = response.split("\r\n")
data = response[-1]
headers = dict([r.split(": ") for r in response[1:-2]])
code = response[0][9:12]
status = response[0][13:]
# strip BOM's from response data
# Especially the WSGI handler from Django seems to generate them (2 actually, huh?)
# a BOM isn't really necessary and cause HTML parsing errors in Chrome and Safari
# See also: http://www.xs4all.nl/~mechiel/projects/bomstrip/
# Although I still find this a ugly hack, it does work.
data = data.replace('\xef\xbb\xbf', '')
# Get the generated errors
errors = errIO.getvalue()
# return the response
if debug:
print("RESPONSE: %r\n" % response)
if errors:
if debug:
print("ERRORS: %r" % errors)
data = "%s\r\n\r\n%s" % (data, errors)
conn.reply_http(
req, data, code=code, status=status, headers=headers)
