Hex dump: ISAPI-WSGI - Runs a WSGIUtils application

As part of researching for my WSGI talk I have been working with Colin Stewart's WSGIUtils. It is a package of wsgi helper libraries that should make the development of wsgi enabled apps easier. The two main components are:

wsgiServer is a multi-threaded WSGI web server based on SimpleHTTPServer.

wsgiAdaptor is a simple WSGI application that provides a Basic authentication, signed cookies and persistent sessions.

After getting his examples working under wsgiServer, I decided to see if the wsgiAdaptor examples worked under isapi_wsgi. Apart from needing to make a change to where the session dbm is created (due to permission issues) and an issue with how my copy of IE 6.0 handles cookies :-(, it worked very well. Below is how to do it:


""" Basic Example

  Copyright (c) 2004 Colin Stewart (http://www.owlfish.com/)
  All rights reserved.
    
  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  If you make any bug fixes or feature enhancements please let me know!
  
  A simple example - a counting web site.
  Note that increments in modern browsers go up twice because two
  requests are made - one for '/' and one for '/favicon.ico'
"""
import logging, time
import isapi_wsgi

from wsgiutils import SessionClient, wsgiAdaptor, wsgiServer
class TestApp:
    def requestHandler (self, request):
        session = request.getSession()
        count = session.get ('counter', 0)
        count += 1
        session ['counter'] = count
        request.sendContent ("<html><body><h1>Visits: %s</h1><body></html>" % str (count), "text/html")
  
 
def __ExtensionFactory__():
    return isapi_wsgi.ISAPISimpleHandler(test = testadaptor.wsgiHook)

testclient = SessionClient.LocalSessionClient('T:/session.dbm', 'testappid')
testadaptor = wsgiAdaptor.wsgiAdaptor (TestApp(), 'siteCookieKey', testclient)

if __name__=='__main__':
    # If run from the command-line, install ourselves.
    from isapi.install import *
    params = ISAPIParameters()
    # Setup the virtual directories - this is a list of directories our
    # extension uses - in this case only 1.
    # Each extension has a "script map" - this is the mapping of ISAPI
    # extensions.
    sm = [
        ScriptMapParams(Extension="*", Flags=0)
    ]
    vd = VirtualDirParameters(Name="isapi-wsgi-wsgiutils",
                              Description = "ISAPI-WSGI WSGIUtils Test",
                              ScriptMaps = sm,
                              ScriptMapUpdate = "replace"
                              )
    params.VirtualDirs = [vd]
    HandleCommandLine(params)

Hex dump

Tuesday, February 22, 2005

ISAPI-WSGI - Runs a WSGIUtils application

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