CARVIEW |
Select Language
HTTP/2 302
date: Tue, 29 Jul 2025 08:11:59 GMT
content-length: 0
location: https://github.com/socketio/socket.io/issues/5122
server-timing: nginx;desc="NGINX";dur=1.17325,glb;desc="GLB";dur=101.74315
x-voltron-version: a2eb102
vary: Accept-Encoding, Accept, X-Requested-With
server: github.com
x-frame-options: DENY
strict-transport-security: max-age=31536000; includeSubDomains; preload
set-cookie: _gh_sess=krAa41rifNuihDp%2BkiWb92KZ9iS2v%2BkE1uzRlz4FbR3QxFFlscD2CqHqaIPLQUbT3af2%2FOpJUN46SJJIA50bJ8uSVZ0GAggFikeCTwP12qDEARHa8myHcL%2FZEnDfQe%2FHybAQnDn5CGZCeyVekuQ6i7bU%2BCNFcaTDKQcO0wOpzAeiXEXfZAxBOR6PvVETyHKMnLZSErrmHV0%2FtyuWG8czs6zQtvFQcCTXntC3ZFwFLUCEAm3xga1OBIDdwdyAn8W8QH6ED7DOOmUTHbyYCLAuSQ%3D%3D--0K7WCgCSm5WWXw%2BE--T5ms9lDlwRBkj%2B%2BMULM2Aw%3D%3D; Path=/; HttpOnly; Secure; SameSite=Lax
set-cookie: _octo=GH1.1.669372011.1753776719; Path=/; Domain=github.com; Expires=Wed, 29 Jul 2026 08:11:59 GMT; Secure; SameSite=Lax
set-cookie: logged_in=no; Path=/; Domain=github.com; Expires=Wed, 29 Jul 2026 08:11:59 GMT; HttpOnly; Secure; SameSite=Lax
x-github-request-id: 9A9E:10E1AB:63A274:7C7B5C:6888824F
HTTP/2 200
date: Tue, 29 Jul 2025 08:12:00 GMT
content-type: text/html; charset=utf-8
cache-control: max-age=0, private, must-revalidate
content-security-policy: default-src 'none'; base-uri 'self'; child-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ gist.github.com/assets-cdn/worker/; connect-src 'self' uploads.github.com www.githubstatus.com collector.github.com raw.githubusercontent.com api.github.com github-cloud.s3.amazonaws.com github-production-repository-file-5c1aeb.s3.amazonaws.com github-production-upload-manifest-file-7fdce7.s3.amazonaws.com github-production-user-asset-6210df.s3.amazonaws.com *.rel.tunnels.api.visualstudio.com wss://*.rel.tunnels.api.visualstudio.com objects-origin.githubusercontent.com copilot-proxy.githubusercontent.com proxy.individual.githubcopilot.com proxy.business.githubcopilot.com proxy.enterprise.githubcopilot.com *.actions.githubusercontent.com wss://*.actions.githubusercontent.com productionresultssa0.blob.core.windows.net/ productionresultssa1.blob.core.windows.net/ productionresultssa2.blob.core.windows.net/ productionresultssa3.blob.core.windows.net/ productionresultssa4.blob.core.windows.net/ productionresultssa5.blob.core.windows.net/ productionresultssa6.blob.core.windows.net/ productionresultssa7.blob.core.windows.net/ productionresultssa8.blob.core.windows.net/ productionresultssa9.blob.core.windows.net/ productionresultssa10.blob.core.windows.net/ productionresultssa11.blob.core.windows.net/ productionresultssa12.blob.core.windows.net/ productionresultssa13.blob.core.windows.net/ productionresultssa14.blob.core.windows.net/ productionresultssa15.blob.core.windows.net/ productionresultssa16.blob.core.windows.net/ productionresultssa17.blob.core.windows.net/ productionresultssa18.blob.core.windows.net/ productionresultssa19.blob.core.windows.net/ github-production-repository-image-32fea6.s3.amazonaws.com github-production-release-asset-2e65be.s3.amazonaws.com insights.github.com wss://alive.github.com api.githubcopilot.com api.individual.githubcopilot.com api.business.githubcopilot.com api.enterprise.githubcopilot.com; font-src github.githubassets.com; form-action 'self' github.com gist.github.com copilot-workspace.githubnext.com objects-origin.githubusercontent.com; frame-ancestors 'none'; frame-src viewscreen.githubusercontent.com notebooks.githubusercontent.com; img-src 'self' data: blob: github.githubassets.com media.githubusercontent.com camo.githubusercontent.com identicons.github.com avatars.githubusercontent.com private-avatars.githubusercontent.com github-cloud.s3.amazonaws.com objects.githubusercontent.com release-assets.githubusercontent.com secured-user-images.githubusercontent.com/ user-images.githubusercontent.com/ private-user-images.githubusercontent.com opengraph.githubassets.com copilotprodattachments.blob.core.windows.net/github-production-copilot-attachments/ github-production-user-asset-6210df.s3.amazonaws.com customer-stories-feed.github.com spotlights-feed.github.com objects-origin.githubusercontent.com *.githubusercontent.com; manifest-src 'self'; media-src github.com user-images.githubusercontent.com/ secured-user-images.githubusercontent.com/ private-user-images.githubusercontent.com github-production-user-asset-6210df.s3.amazonaws.com gist.github.com; script-src github.githubassets.com; style-src 'unsafe-inline' github.githubassets.com; upgrade-insecure-requests; worker-src github.githubassets.com github.com/assets-cdn/worker/ github.com/assets/ gist.github.com/assets-cdn/worker/
link: ; rel=preload; as=fetch; crossorigin=use-credentials
referrer-policy: no-referrer-when-downgrade
server-timing: issue_layout-fragment;desc="issue_layout fragment";dur=197.930097,issue_conversation_content-fragment;desc="issue_conversation_content fragment";dur=640.63243,issue_conversation_sidebar-fragment;desc="issue_conversation_sidebar fragment";dur=49.594019,nginx;desc="NGINX";dur=1.437543,glb;desc="GLB";dur=102.233512
strict-transport-security: max-age=31536000; includeSubdomains; preload
vary: X-PJAX, X-PJAX-Container, Turbo-Visit, Turbo-Frame, X-Requested-With, Accept,Accept-Encoding, Accept, X-Requested-With
x-content-type-options: nosniff
x-frame-options: deny
x-voltron-version: a2eb102
x-xss-protection: 0
server: github.com
content-encoding: gzip
accept-ranges: bytes
x-github-request-id: 9A9E:10E1AB:63A2B3:7C7BA4:6888824F
Won't switch to polling transport when Websocket transport failed · Issue #5122 · socketio/socket.io · GitHub
No one assignedNo typeNo projectsNone yetNo branches or pull requests
Skip to content
Navigation Menu
{{ message }}
-
Notifications
You must be signed in to change notification settings - Fork 10.1k
Closed
Labels
package:socket.io-clientThis concerns the "socket.io-client" packageThis concerns the "socket.io-client" packagequestionFurther information is requestedFurther information is requested
Milestone
Description
Describe the bug
I'm trying to connect with websocket
transport first and if it fails I was hoping socketio would switch to long-polling. But for some reason, it keeps reconnecting with websocket
transport and never switches to polling.
To Reproduce
Socket.IO server version: 4.7.2
Server
const { Server } = require("socket.io");
const express = require("express");
const http = require("http");
const server = http.createServer(express());
const io = new Server({
transports: ["polling", "websocket"],
});
io.on("connection", socket => {
console.log("New Connection");
});
io.attach(server);
server.listen(3000);
Socket.IO client version: 4.7.2
Client
import { io } from "socket.io-client";
const socket = io({
transports: ["websocket", "polling"],
});
socket.on("connect_error", err => {
console.log("connect_error", err);
})
Expected behavior
Was expecting the transport would switch to long-polling when websocket isn't available.
Platform:
- Device: Firefox 120
- OS: Windows 10
Additional context
I disabled websocket by blocking websocket calls using the Firefox request blocking feature. Can be disabled using this TamperMonkey script as well.
Metadata
Metadata
Assignees
Labels
package:socket.io-clientThis concerns the "socket.io-client" packageThis concerns the "socket.io-client" packagequestionFurther information is requestedFurther information is requested
Type
Projects
Milestone
Relationships
Development
Issue actions
You can’t perform that action at this time.