I'm trying to test my React application on a mobile device. I'm using ngrok to make my local server available to other devices and have gotten this working with a variety of other applications. However, when I try to connect ngrok to the React dev server, I get the error:
Invalid Host Header
I believe that React blocks all requests from another source by default. Any thoughts?
I'm encountering a similar issue and found two solutions that work as far as viewing the application directly in a browser
ngrok http 8080 -host-header="localhost:8080"
ngrok http --host-header=rewrite 8080
obviously replace 8080 with whatever port you're running on
this solution still raises an error when I use this in an embedded page, that pulls the bundle.js from the react app. I think since it rewrites the header to localhost, when this is embedded, it's looking to localhost, which the app is no longer running on
Option 1
If you do not need to use Authentication you can add configs to ngrok commands
ngrok http 9000 --host-header=rewrite
or
ngrok http 9000 --host-header="localhost:9000"
But in this case Authentication will not work on your website because ngrok rewriting headers and session is not valid for your ngrok domain
Option 2
If you are using webpack you can add the following configuration
devServer: {
disableHostCheck: true
}
In that case Authentication header will be valid for your ngrok domain
Don't know why but tried everything and it didn't work for me.
What finally worked for me is this:
ngrok http https://localhost:4200 -host-header="localhost:4200"
it might be useful for someone