ISAPI-WSGI - Runs a CherryPy2 application

In my ongoing testing of ISAPI-WSGI, with a Subversion checkout of CherryPy2 I have some of the tutorials running as an ISAPI extension. Only issue discovered relates to how CherryPy handles an empty PATH_INFO but I am sure this will be resolved soon. For the time being the url to access the example must have a trailing backslash. This has now been resolved. Thanks to Remco and Remi for helping me with it.

So now that I have proved CherryPy2 can work with ISAPI-WSGI, Subway should be able to run as an ISAPI extension.

I will add the example to ISAPI-WSGI subversion repository tomorrow. Below is how to get tutorial 3 working:

# Demo of tutorial 3 running cherrypy2 under isapi-wsgi
#
# Executing this script (or any server config script) will install the extension
# into your web server and will create a "loader" DLL _cherrypy.dll in the
# current directory. As the server executes, the PyISAPI framework will load
# this module and create the Extension object.
# A Virtual Directory named "isapi-wsgi-cherrypy" is setup. This dir has the ISAPI
# WSGI extension as the only application, mapped to file-extension '*'.
# Therefore, isapi_wsgi extension handles *all* requests in this directory.
#
# To launch this application from a web browser use a url similar to:
#
#  http://localhost/isapi-wsgi-cherrypy/test/
#
# NOTE: Due to an issue in how CherryPy2 currently handles PATH_INFO
# the url must have the trailing /

import isapi_wsgi
import cherrypy
from cherrypy import wsgiapp
from cherrypy import cpg

class WelcomePage:

    def index(self):
        # Ask for the user's name.
        return '''
            <form action="greetUser" method="get">
            What is your name?
            <input style="BACKGROUND-COLOR: #ffffa0" name="name">
            <input type="submit" value="Submit Query">
            </form>
        '''

    index.exposed = True


    def greetUser(self, name = None):
        # CherryPy passes all GET and POST variables as method parameters.
        # It doesn't make a difference where the variables come from, how
        # large their contents are, and so on.
        #
        # You can define default parameter values as usual. In this
        # example, the "name" parameter defaults to None so we can check
        # if a name was actually specified.

        if name:
            # Greet the user!
            return "Hey %s, what's up?" % name
        else:
            # No name was specified
            return 'Please enter your name <a href="./">here</a>.'

    greetUser.exposed = True


class CherryPyWsgiApp:
    cpg.root = WelcomePage()
    wsgiapp.init(configDict = {'socketPort': 80, 'sessionStorageType': 'ram'})
    def __call__(self, environ, start_response):
        return wsgiapp.wsgiApp(environ, start_response)

# The entry points for the ISAPI extension.
def __ExtensionFactory__():
    return isapi_wsgi.ISAPISimpleHandler(test = CherryPyWsgiApp())

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-cherrypy",
                              Description = "ISAPI-WSGI Cherrypy Test",
                              ScriptMaps = sm,
                              ScriptMapUpdate = "replace"
                              )
    params.VirtualDirs = [vd]
    HandleCommandLine(params)