HTTP 502 on the General page of the Web interface when serving through reverse proxy

[docstalek]

Describe the bug
When trying to access the General page, the page get stuck on loading (blue circular rotating)
I get an HTTP 502 on the /api?action=0&page=1

This only happens on the General page when serving the web interface through a Reverse proxy, Nginx Proxy Manager.

All other pages works without any issue.

When accessing directly through http://xzg.local/general, it works fine.

Device information

• Screenshot of Zigbee and Device tab from root page of device:

• JSON object returned on http://xzg.local/api?action=1&param=all
  { "network-config": { "wifiEnbl": false, "wifiSsid": "", "wifiPass": "", "wifiDhcp": true, "wifiIp": "::", "wifiMask": "255.255.255.0", "wifiGate": "::", "wifiDns1": "1.1.1.1", "wifiDns2": "8.8.8.8", "wifiPwr": 78, "wifiMode": 1, "ethEnbl": true, "ethDhcp": true, "ethIp": "x.x.x.x", "ethMask": "255.255.255.0", "ethGate": "x.x.x.1", "ethDns1": "1.1.1.1", "ethDns2": "8.8.8.8" }, "vpn-config": { "wgEnable": false, "wgLocalIP": "::", "wgLocalSubnet": "255.255.255.0", "wgLocalPort": 33333, "wgLocalGateway": "0.0.0.0", "wgLocalPrivKey": "", "wgEndAddr": "", "wgEndPubKey": "", "wgEndPort": 0, "wgAllowedIP": "0.0.0.0", "wgAllowedMask": "0.0.0.0", "wgMakeDefault": true, "wgPreSharedKey": "", "hnEnable": false, "hnJoinCode": "", "hnHostName": "XZG-502F", "hnDashUrl": "default" }, "mqtt-config": { "enable": true, "server": "x.x.x.x", "port": 1883, "user": "********", "pass": "********", "topic": "uzg", "updateInt": 60, "discovery": true, "reconnectInt": 30 }, "system-config": { "disableWeb": false, "webAuth": false, "webUser": "admin", "webPass": "", "fwEnabled": false, "fwIp": "x.x.x.x", "serialSpeed": 115200, "socketPort": 6638, "tempOffset": 20, "disableLedUSB": false, "disableLedPwr": false, "refreshLogs": 10, "hostname": "UZG-01", "timeZone": "Europe/Oslo", "ntpServ1": "pool.ntp.org", "ntpServ2": "time.google.com", "nightMode": false, "startHour": "23:00", "endHour": "07:00", "workMode": 0, "zbRole": 1, "zbFw": "20240710", "updHour": "01:00", "updDays": "*", "autoIns": false } }

To Reproduce
Steps to reproduce the behavior:

1. Use Nginx Proxy Manager to serve the web interface through domain with SSL. e.g. https://zigbee.domain.com. --> Destination is http://xzg.local:80. Support for Websockets enabled.
2. Go to https://zigbee.domain.com/general
3. Loading icon appears.
4. Call to https://zigbee.domain.com/api?action=0&page=1 results in HTTP 502

Expected behavior
Expect the General page to show. Call to https://zigbee.domain.com/api?action=0&page=1 should result in HTTP 200.

[DieMetRik]

I have the same issue
All other works, except /general

[SAOPP]

I use Traefik and I don’t see any similar problems, maybe the question concerns NPM?

[Nitooo]

This happens because the header is to large for the default setting. You can go to the advanced tab and add this:
proxy_buffers 16 16k;
proxy_buffer_size 32k;
proxy_busy_buffers_size 64k;
proxy_max_temp_file_size 64k;

than it should just work fine.