# Use NodeRED in an iframe behind a proxy
**URL:** https://discourse.nodered.org/t/use-nodered-in-an-iframe-behind-a-proxy/32505
**Category:** General
**Created:** [6 September 2020 11:24 UTC](https://discourse.nodered.org/t/use-nodered-in-an-iframe-behind-a-proxy/32505 "2020-09-06T11:24:56Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@zbrause](https://discourse.nodered.org/u/zbrause)
#### Post date: [6 September 2020 11:24 UTC](https://discourse.nodered.org/t/use-nodered-in-an-iframe-behind-a-proxy/32505/1 "2020-09-06T11:24:56Z")
My NodeRed instance runs on a pc (currently ubuntu 20.04) behind a nginx reverse proxy. I installed it today with the install script, so it should be the latest stable version (i guess). Nginx config, proxy settings taken from [https://discourse.nodered.org/t/node-red-server-with-nginx-reverse-proxy-howto-guide/27397](https://discourse.nodered.org/t/node-red-server-with-nginx-reverse-proxy-howto-guide/27397):
```auto
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name _;
location / {
proxy_pass http://127.0.0.1:1880;
proxy_http_version 1.1;
proxy_cache_bypass $http_upgrade;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Port $server_port;
}
}
```
This works great so far with direct access. Though, I want to use another pc as proxy server for this one (ubuntu 20.04 as well), and I use nginx with almost identical settings:
```auto
server {
listen 80;
listen [::]:80;
server_name s1.hiveserver;
location / {
proxy_pass http://10.0.0.2;
proxy_http_version 1.1;
proxy_cache_bypass $http_upgrade;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Port $server_port;
}
}
```
This works great as well in conjuction with my local hosts file:
```auto
192.168.57.10 hiveserver
192.168.57.10 s1.hiveserver
```
with 192.168.57.10 being the IP of the proxy.
As long as i access s1.hiveserver in the browser directly, it works perfectly fine. But if I serve a simple website from the proxy itself ([http://hiveserver](http://hiveserver)) containing an iframe with the s1.hiveserver site, the nodered header loads, but the rest of the windows stays gray.
This is the site the proxy is serving:
```auto
Server frontend page
```
And the result:
When loading the page, the js scripts get loaded with status 200, but the JS console shows an error:
```auto
jQuery.Deferred exception: Cannot read property 'getItem' of null TypeError: Cannot read property 'getItem' of null
at Object.init (http://s1.hiveserver/red/red.min.js:16:15443)
at Object.init (http://s1.hiveserver/red/red.min.js:16:14844)
at HTMLDocument. (http://s1.hiveserver/red/main.min.js:16:161)
at e (http://s1.hiveserver/vendor/vendor.js:2:30005)
at t (http://s1.hiveserver/vendor/vendor.js:2:30307) undefined
vendor.js:2 Uncaught TypeError: Cannot read property 'getItem' of null
at Object.init (red.min.js:16)
at Object.init (red.min.js:16)
at HTMLDocument. (main.min.js:16)
at e (vendor.js:2)
at t (vendor.js:2)
```
The error is 100% reproducable, even after reboot.
Unfortunately the error is so generic and seems very common with some Android web widget, I could not get any help from googling the error.
Has anybody an idea how to approach this? Please ask if something I wrote is unclear.
[EDIT]: Surprisingly, the error does not occur in the firefox browser, but only in the brave browser (chromium engine).
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [5 November 2020 11:25 UTC](https://discourse.nodered.org/t/use-nodered-in-an-iframe-behind-a-proxy/32505/2 "2020-11-05T11:25:02Z")
This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.