mrjoes/demo.html

## demo.html
<html>
    <body>
        Hello {{ subdomain }}!
        <img src="{{ url_for('static', subdomain=subdomain, filename='avatar.jpeg', _external=True) }}"></img>
    </body>
</html>

## demo.py
from flask import Flask, render_template, g
from flask_admin import BaseView, AdminIndexView, Admin, expose


# Custom Flask app which allows us to send static files from different import
# subdomains
class DemoApp(Flask):
    # Send static file and set CORS policy
    def send_static_file(self, filename, subdomain=None):
        response = super(DemoApp, self).send_static_file(filename)
        response.headers['Access-Control-Allow-Origin'] = '*'
        return response


# Admin mixin class
class AdminMixin(object):
    # Subdomain helpers - store current subdomain in the Flask `g` object
    @property
    def subdomain(self):
        return getattr(g, 'subdomain', None)

    @subdomain.setter
    def subdomain(self, value):
        g.subdomain = value

    # Overrides `get_url` - current `subdomain` will be always injected into `url_for`
    def get_url(self, endpoint, **kwargs):
        kwargs.setdefault('subdomain', self.subdomain)
        return super(AdminMixin, self).get_url(endpoint, **kwargs)

    # Removes `subdomain` arg before calling admin views, so we don't have to
    # override each and every of them
    def _run_view(self, fn, *args, **kwargs):
        if 'subdomain' in kwargs:
            self.subdomain = kwargs.pop('subdomain')

        return fn(self, *args, **kwargs)


# This is our base admin view. Can do the same for ModelView
class AdminView(AdminMixin, BaseView):
    pass


# This is custom administrative index view
class IndexView(AdminMixin, BaseView):
    def __init__(self):
        # Lets initialize as usual
        super(IndexView, self).__init__(name='Home',
                                        category=None,
                                        url='/admin',
                                        endpoint='admin',
                                        static_folder=None)

    # Our home page
    @expose()
    def index(self):
        return self.render('admin/index.html')

    # Custom `send_static_file` that knows how to handle subdomains
    def send_static_file(self, filename, subdomain=None):
        # There's a better way - just send file using `send_from_directory`
        # instead of messing around with static_folder value. But for sake of
        # example - it works.
        if self.blueprint.static_folder is None:
            self.blueprint.static_folder = 'static'

        return self.blueprint.send_static_file(filename)

    # Override blueprint creation logic and add static URL rule
    def create_blueprint(self, admin):
        bp = super(IndexView, self).create_blueprint(admin)

        app.add_url_rule('/admin/static/<path:filename>',
                         endpoint='admin.static',
                         subdomain='<subdomain>',
                         view_func=self.send_static_file)

        return bp


# Just a test admin view
class TestView(AdminView):
    @expose()
    def index(self):
        return self.render('test.html',
                           subdomain=self.subdomain)


# Lets create Flask app and disable automatic static folder
app = DemoApp(__name__, static_folder=None)


# Demo view
@app.route('/', subdomain='<subdomain>')
def index(subdomain):
    return render_template('demo.html', subdomain=subdomain)


def run():
    # Preconfigure the app
    app.static_folder = 'static'
    app.config['SERVER_NAME'] = 'demo.dev:5000'

    # Add static URL rules
    app.add_url_rule('/static/<path:filename>',
                     endpoint='static',
                     view_func=app.send_static_file)
    app.add_url_rule('/static/<path:filename>',
                     endpoint='static',
                     subdomain='<subdomain>',
                     view_func=app.send_static_file)

    # Create admin, use custom IndexView() that'll inject Flask-Admin static
    # folders
    admin = Admin(app,
                  subdomain='<subdomain>',
                  index_view=IndexView())
    admin.add_view(TestView())

    app.run(debug=True)


if __name__ == '__main__':
    run()

## test.html
{% extends 'admin/master.html' %}

{% block body %}
Hello for {{ subdomain }}!
{% endblock %}
	<html>
	<body>
	Hello {{ subdomain }}!
	<img src="{{ url_for('static', subdomain=subdomain, filename='avatar.jpeg', _external=True) }}"></img>
	</body>
	</html>
	from flask import Flask, render_template, g
	from flask_admin import BaseView, AdminIndexView, Admin, expose


	# Custom Flask app which allows us to send static files from different import
	# subdomains
	class DemoApp(Flask):
	# Send static file and set CORS policy
	def send_static_file(self, filename, subdomain=None):
	response = super(DemoApp, self).send_static_file(filename)
	response.headers['Access-Control-Allow-Origin'] = '*'
	return response


	# Admin mixin class
	class AdminMixin(object):
	# Subdomain helpers - store current subdomain in the Flask `g` object
	@property
	def subdomain(self):
	return getattr(g, 'subdomain', None)

	@subdomain.setter
	def subdomain(self, value):
	g.subdomain = value

	# Overrides `get_url` - current `subdomain` will be always injected into `url_for`
	def get_url(self, endpoint, **kwargs):
	kwargs.setdefault('subdomain', self.subdomain)
	return super(AdminMixin, self).get_url(endpoint, **kwargs)

	# Removes `subdomain` arg before calling admin views, so we don't have to
	# override each and every of them
	def _run_view(self, fn, args, *kwargs):
	if 'subdomain' in kwargs:
	self.subdomain = kwargs.pop('subdomain')

	return fn(self, args, *kwargs)


	# This is our base admin view. Can do the same for ModelView
	class AdminView(AdminMixin, BaseView):
	pass


	# This is custom administrative index view
	class IndexView(AdminMixin, BaseView):
	def __init__(self):
	# Lets initialize as usual
	super(IndexView, self).__init__(name='Home',
	category=None,
	url='/admin',
	endpoint='admin',
	static_folder=None)

	# Our home page
	@expose()
	def index(self):
	return self.render('admin/index.html')

	# Custom `send_static_file` that knows how to handle subdomains
	def send_static_file(self, filename, subdomain=None):
	# There's a better way - just send file using `send_from_directory`
	# instead of messing around with static_folder value. But for sake of
	# example - it works.
	if self.blueprint.static_folder is None:
	self.blueprint.static_folder = 'static'

	return self.blueprint.send_static_file(filename)

	# Override blueprint creation logic and add static URL rule
	def create_blueprint(self, admin):
	bp = super(IndexView, self).create_blueprint(admin)

	app.add_url_rule('/admin/static/<path:filename>',
	endpoint='admin.static',
	subdomain='<subdomain>',
	view_func=self.send_static_file)

	return bp


	# Just a test admin view
	class TestView(AdminView):
	@expose()
	def index(self):
	return self.render('test.html',
	subdomain=self.subdomain)


	# Lets create Flask app and disable automatic static folder
	app = DemoApp(__name__, static_folder=None)


	# Demo view
	@app.route('/', subdomain='<subdomain>')
	def index(subdomain):
	return render_template('demo.html', subdomain=subdomain)


	def run():
	# Preconfigure the app
	app.static_folder = 'static'
	app.config['SERVER_NAME'] = 'demo.dev:5000'

	# Add static URL rules
	app.add_url_rule('/static/<path:filename>',
	endpoint='static',
	view_func=app.send_static_file)
	app.add_url_rule('/static/<path:filename>',
	endpoint='static',
	subdomain='<subdomain>',
	view_func=app.send_static_file)

	# Create admin, use custom IndexView() that'll inject Flask-Admin static
	# folders
	admin = Admin(app,
	subdomain='<subdomain>',
	index_view=IndexView())
	admin.add_view(TestView())

	app.run(debug=True)


	if __name__ == '__main__':
	run()
	{% extends 'admin/master.html' %}

	{% block body %}
	Hello for {{ subdomain }}!
	{% endblock %}