Websocket proxy does not complete
Problem
I am using http-proxy to proxy to the socket.io driven app tty.js The socket does not seem to be connecting most of the time. 1 of 5 times I refresh the page it connects, otherwise I see `Text Status: Pending` for the websocket, in chrome developer tools: I am using: - Amazon EC2 linux: `$uname -a Linux ip-10-236-133-58 3.4.37-40.44.amzn1.x86_64 #1 SMP Thu Mar 21 01:17:08 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux ` - Either `node v0.10.13` and `node v0.6.21` - `http-proxy@0.10.3`
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1 Fix
Fix WebSocket Connection Issues in Proxy Setup
The WebSocket connection is not completing due to potential issues with the proxy configuration, including incorrect handling of WebSocket upgrade requests and timeouts. The http-proxy version being used may not fully support WebSocket connections in the way required by socket.io, especially in older Node.js versions.
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- 1
Upgrade Node.js
Upgrade Node.js to a more recent version that has better support for WebSocket and socket.io. Versions 14.x or higher are recommended for improved performance and compatibility.
bashnvm install 14 && nvm use 14 - 2
Update http-proxy
Update http-proxy to a newer version that has improved WebSocket support. The latest version can handle WebSocket connections more reliably.
bashnpm install http-proxy@latest - 3
Configure WebSocket Upgrade Handling
Ensure that your proxy configuration correctly handles WebSocket upgrade requests. This includes setting the appropriate headers and ensuring that the upgrade is properly routed.
javascriptconst proxy = require('http-proxy').createProxyServer(); proxy.on('upgrade', function (req, socket, head) { proxy.ws(req, socket, head, { target: 'ws://your.socket.io.server' }); }); - 4
Increase Timeout Settings
Increase the timeout settings for the proxy to allow more time for WebSocket connections to establish, especially under heavy load or slow network conditions.
javascriptproxy.timeout = 60000; // Set timeout to 60 seconds - 5
Test and Monitor Connections
After making the above changes, test the WebSocket connections by refreshing the page multiple times and monitoring the connection status in Chrome Developer Tools. Ensure that the connections are stable and complete.
bashNo code required for this step.
Validation
Confirm that the WebSocket connection completes successfully on multiple refreshes without showing 'Text Status: Pending'. Monitor the server logs for any errors related to WebSocket connections.
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Environment
Submitted by
Alex Chen
2450 rep