Hi, is there any update on this issue?
I require this functionality myself, and the fix @jfreund proposed does work.
I also ran into another issue when having a POST request that I would think is probably similar, but a similar fix doesn’t work.
I’m using Dash combined with Flask, and I have a callback function to navigate to other pages.
However, the callback request results in a POST request that goes into Hops, and in there it’s not able to find the hops component because the endpoint it’s looking for is /_dash-update-component, so it returns an error. So I tried a similar fix, by doing instead:
elif method == "POST":
data = request.data
res, results = self.solve(uri=comp_uri, payload=data)
if res:
response = self._prep_response()
response.data = results.encode(encoding="utf_8")
else:
response = self._prep_response(404, "Execution Error")
return self.wsgi_app(environ, start_response)
return response(environ, start_response)
However, when calling wsgi_app, it’s for some reason no longer able to load the request object, and it gets stuck trying to load it, as can also be seen here that it’s trying to fetch:
You can find the basics of my app below:
from flask import Flask
from flask_bootstrap import Bootstrap
import ghhops_server as hs
from dash import Dash, html, Output, Input, dcc
import dash_bootstrap_components as dbc
EXTERNAL_STYLESHEETS = [dbc.themes.BOOTSTRAP]
server = Flask(__name__)
app = Dash(
server=server,
url_base_pathname='/base/',
external_stylesheets=EXTERNAL_STYLESHEETS)
hops = hs.Hops(server)
Bootstrap(server)
navbar = dbc.Navbar(
dbc.Container(
[
html.A(
dbc.Row(
[
# dbc.Col(html.Img(src=APP_LOGO, height='50px')),
dbc.Col(dbc.NavbarBrand('Polar Bear', className="ms-2"), style={'fontWeight': 'bold'})
],
align='center'),
href='/base/home/'),
dbc.NavItem(dbc.NavLink("Training Data", href='/base/training_data/'))
]),
color='dark',
dark=True
)
app.layout = html.Div([
dcc.Location(id='url', refresh=False),
navbar,
html.H1("Base page"),
html.Div(id='page-content')
])
@app.callback(
Output('page-content', 'children'),
[Input('url', 'pathname')])
def display_page(pathname):
if pathname == '/base/training_data/':
return html.Div(children=[html.H1("Training data page")])
else:
return html.Div(children=[html.H1("Home page")])
if __name__ == "__main__":
server.run(debug=True)