Page not updating

[michielbdejong]

I'm working on a bridge bot between Slack and Solid and I noticed I need to refresh the page on the Solid chat for new messages to be displayed. Instead, the page should update whenever a new message comes in. I think this used to work in the past.

[michielbdejong]

For the demo I'm doing today I'll paste this snippet into the browser console, to work around it:

const todayDoc = 'https://michielbdejong.solidcommunity.net/IndividualChats/nlnet-demo/2025/05/13/chat.ttl';
const streamingUrl = `https://solidcommunity.net/.notifications/StreamingHTTPChannel2023/${encodeURIComponent(todayDoc)}`;
const res = await fetch(streamingUrl);
const textStream = res.body.pipeThrough(new TextDecoderStream());
let first = true;
for await (const notificationText of textStream) {
  console.log(notificationText);
  if (first) {
    first = false;
  } else {
    window.location = '';
  }
}

[melvincarvalho]

As long as I can remember chat has updated in realtime. It uses the updater class to pull in new messages via the websocket. Maybe this broke in the migration, but it had been working for 10 years solidly before that.

[michielbdejong]

That's also what I remembered! Maybe we need to enable WebSockets on solidcommunity.net.
I think the relevant config is this one in Pivot
which points to this one in CSS. But when I curl -i https://michielbdejong.solidcommunity.net/profile/card I only see the following Link response headers:

Link: <http://www.w3.org/ns/ldp#Resource>; rel="type"
Link: <https://michielbdejong.solidcommunity.net/profile/card.meta>; rel="describedby"
Link: <https://solidcommunity.net/.notifications/StreamingHTTPChannel2023/https%3A%2F%2Fmichielbdejong.solidcommunity.net%2Fprofile%2Fcard>; rel="http://www.w3.org/ns/solid/terms#updatesViaStreamingHttp2023"
Link: <https://michielbdejong.solidcommunity.net/profile/card.acl>; rel="acl"
Link: <https://michielbdejong.solidcommunity.net/.well-known/solid>; rel="http://www.w3.org/ns/solid/terms#storageDescription"

Despite the fact that solid:updatesViaStreamingHttp2023 is listed there, the client needs to fetch the solid:storageDescription from https://michielbdejong.solidcommunity.net/.well-known/solid to discover the following:

<https://michielbdejong.solidcommunity.net/> a <http://www.w3.org/ns/pim/space#Storage>;
  <http://www.w3.org/ns/solid/notifications#subscription> 
    <https://solidcommunity.net/.notifications/WebSocketChannel2023/>, 
    <https://solidcommunity.net/.notifications/WebhookChannel2023/>.

<https://solidcommunity.net/.notifications/WebSocketChannel2023/>
  <http://www.w3.org/ns/solid/notifications#channelType>
    <http://www.w3.org/ns/solid/notifications#WebSocketChannel2023>;
  <http://www.w3.org/ns/solid/notifications#feature>
    <http://www.w3.org/ns/solid/notifications#accept>,
    <http://www.w3.org/ns/solid/notifications#endAt>,
    <http://www.w3.org/ns/solid/notifications#rate>,
    <http://www.w3.org/ns/solid/notifications#startAt>,
    <http://www.w3.org/ns/solid/notifications#state>.

<https://solidcommunity.net/.notifications/WebhookChannel2023/>
  <http://www.w3.org/ns/solid/notifications#channelType>
    <http://www.w3.org/ns/solid/notifications#WebhookChannel2023>;
  <http://www.w3.org/ns/solid/notifications#feature>
    <http://www.w3.org/ns/solid/notifications#accept>,
    <http://www.w3.org/ns/solid/notifications#endAt>,
    <http://www.w3.org/ns/solid/notifications#rate>,
    <http://www.w3.org/ns/solid/notifications#startAt>,
    <http://www.w3.org/ns/solid/notifications#state>.