editor.py 文件源码

def build_dummy_request(newsitem):
    """
    Construct a HttpRequest object that is, as far as possible,
    representative of ones that would receive this page as a response. Used
    for previewing / moderation and any other place where we want to
    display a view of this page in the admin interface without going
    through the regular page routing logic.
    """
    url = newsitem.full_url
    if url:
        url_info = urlparse(url)
        hostname = url_info.hostname
        path = url_info.path
        port = url_info.port or 80
    else:
        # Cannot determine a URL to this page - cobble one together based on
        # whatever we find in ALLOWED_HOSTS
        try:
            hostname = settings.ALLOWED_HOSTS[0]
        except IndexError:
            hostname = 'localhost'
        path = '/'
        port = 80

    request = WSGIRequest({
        'REQUEST_METHOD': 'GET',
        'PATH_INFO': path,
        'SERVER_NAME': hostname,
        'SERVER_PORT': port,
        'HTTP_HOST': hostname,
        'wsgi.input': StringIO(),
    })

    # Apply middleware to the request - see http://www.mellowmorning.com/2011/04/18/mock-django-request-for-testing/
    handler = BaseHandler()
    handler.load_middleware()
    # call each middleware in turn and throw away any responses that they might return
    for middleware_method in handler._request_middleware:
        middleware_method(request)

    return request