from urllib import unquote
from werkzeug.wrappers import BaseResponse as Response

class ScriptNameFixer(object):
    """Sets SCRIPT_NAME from REQUEST_URI."""

    def __init__ (self, app):
        self.app = app

    def __call__ (self, environ, start_response):
        uri = unquote(environ["REQUEST_URI"]).split('?', 1)[0]
        path = environ["PATH_INFO"]
        
        if uri.endswith(path):
            environ["SCRIPT_NAME"] = uri[:-len(path)]

        return self.app(environ, start_response)

def EnvironApp(environ, start_response):
    """Returns the WSGI environment as response."""
    
    r = Response(str(environ))                                                                                                 
    return r(environ, start_response)