Merge pull request #962 from colinl/946_socket_error_recovery_2

Force page reload on socket connect error 'parser error'

ui/src/main.mjs

@@ -151,6 +151,14 @@ fetch('_setup')
 
         socket.on('connect_error', (err) => {
             console.error('SIO connect error:', err, `err: ${JSON.stringify(err)}`)
+            if (err?.code === 'parser error') {
+                // There has been a 'parser error' during the attempt to connect. This means that socket.io
+                // does not like the response from the server from the attempt to connect.
+                // This happens if there is a proxy server in front of node red that has redirected to
+                // a login page. There may also be other situations under which this error occurs, but whatever the
+                // cause it doesn't seem that we can do much other than force a reload.
+                forcePageReload('parser error')
+            }
         })
 
         // default interval - every 2.5 seconds