Query: refelect only output only in web page load till analysis ready using python flask

Relevant code:
def is_standalone(self):
        """Return True if Glances is running in standalone mode."""
        return (not self.args.client and
                not self.args.browser and
                not self.args.server and
                not self.args.webserver)

Similar but not relevant code:
def phantomjs_retrieve(url, data=None):
    """Retrieve the given URL using PhantomJS.
    PhantomJS will evaluate all scripts and return the HTML after body.onload.
    
    url  - The page URL to retrieve
    data - The form data. TODO: Currently ignored.

    Returns a status code (e.g. 200) and the HTML as a unicode string.
    """
    range_limit()
    print "pGET", url
    process = subprocess.Popen(['phantomjs', PHANTOM_SCRIPT, url], stdout=subprocess.PIPE)
    out = process.communicate()
    process.wait()
    response = out[0].decode('utf-8', 'ignore')
    status = response[:2]
    body = response[3:] # After the 'ok ' part.
    if status == 'ok':
        return 200, body
    else:
        return 404, body

Similar but not relevant code:
def _has_fr_route(self):
        """Encapsulating the rules for whether the request was to a Flask endpoint"""
        # 404's, 405's, which might not have a url_rule
        if self._should_use_fr_error_handler():
            return True
        # for all other errors, just check if FR dispatched the route
        if not request.url_rule:
            return False
        return self.owns_endpoint(request.url_rule.endpoint)

Similar but not relevant code:
def view_500(request, url=None):
    """
    it returns a 500 http response
    """
    res = render_to_response("500.html", context_instance=RequestContext(request))
    res.status_code = 500
    return res

Similar but not relevant code:
def assert_redirect(self, response, expected_url=None):
        """
        assertRedirects from Django TestCase follows the redirects chains,
        this assertion does not - which is more like real unit testing
        """
        self.assertIn(
            response.status_code,
            self.redirect_codes,
            self._get_redirect_assertion_message(response),
        )
        if expected_url:
            location_header = response._headers.get('location', None)
            self.assertEqual(
                location_header,
                ('Location', str(expected_url)),
                'Response should redirect to {0}, but it redirects to {1} instead'.format(
                    expected_url,
                    location_header[1],
                )
            )

Similar but not relevant code:
def get_code_language(self):
        """
        This is largely copied from bokeh.sphinxext.bokeh_plot.run
        """
        js_source = self.get_js_source()
        if self.options.get("include_html", False):
            resources = get_sphinx_resources(include_bokehjs_api=True)
            html_source = BJS_HTML.render(
                css_files=resources.css_files,
                js_files=resources.js_files,
                bjs_script=js_source)
            return [html_source, "html"]
        else:
            return [js_source, "javascript"]