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Do not fetch old messages on old connecting to avoid douple rendering

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This commit is contained in:
Philipp Heckel 2022-02-24 10:30:58 -05:00
parent 1536201e9a
commit 202c4ac4b3
2 changed files with 8 additions and 4 deletions
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9
web/src/app/Connection.js
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@ -1,4 +1,4 @@
import {shortTopicUrl, topicUrlWs} from "./utils";
import {shortTopicUrl, topicUrlWs, topicUrlWsWithSince} from "./utils";
const retryBackoffSeconds = [5, 10, 15, 20, 30, 45, 60, 120];
@ -16,8 +16,11 @@ class Connection {
}
start() {
const since = (this.since === 0) ? "all" : this.since.toString();
const wsUrl = topicUrlWs(this.baseUrl, this.topic, since);
// Don't fetch old messages; we do that as a poll() when adding a subscription;
// we don't want to re-trigger the main view re-render potentially hundreds of times.
const wsUrl = (this.since === 0)
? topicUrlWs(this.baseUrl, this.topic)
: topicUrlWsWithSince(this.baseUrl, this.topic, this.since.toString());
console.log(`[Connection, ${this.shortUrl}] Opening connection to ${wsUrl}`);
this.ws = new WebSocket(wsUrl);
this.ws.onopen = (event) => {

3
web/src/app/utils.js
View file

@ -1,7 +1,8 @@
export const topicUrl = (baseUrl, topic) => `${baseUrl}/${topic}`;
export const topicUrlWs = (baseUrl, topic, since) => `${topicUrl(baseUrl, topic)}/ws?since=${since}`
export const topicUrlWs = (baseUrl, topic) => `${topicUrl(baseUrl, topic)}/ws`
.replaceAll("https://", "wss://")
.replaceAll("http://", "ws://");
export const topicUrlWsWithSince = (baseUrl, topic, since) => `${topicUrlWs(baseUrl, topic)}?since=${since}`;
export const topicUrlJson = (baseUrl, topic) => `${topicUrl(baseUrl, topic)}/json`;
export const topicUrlJsonPoll = (baseUrl, topic) => `${topicUrlJson(baseUrl, topic)}?poll=1`;
export const shortUrl = (url) => url.replaceAll(/https?:\/\//g, "");