Crow (v4) and Dove (v5) backward compatibility #2443
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Are v4 clients (socket and REST) compatible with v5 servers (and vice versa)? |
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Replies: 2 comments
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Wanted to bring this up since there were a couple of gotchas/surprises with the last upgrade with respect to compat. |
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The message and request format is the same, however Socket.io introduced breaking protocol changes that later got smoothed out with an explicit backwards compatibility opt in: app.configure(socketio({
allowEIO3: true // false by default
});More information can be found at https://socket.io/docs/v3/migrating-from-2-x-to-3-0/index.html#How-to-upgrade-an-existing-production-deployment (also linked from the migration guide). |
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The message and request format is the same, however Socket.io introduced breaking protocol changes that later got smoothed out with an explicit backwards compatibility opt in:
More information can be found at https://socket.io/docs/v3/migrating-from-2-x-to-3-0/index.html#How-to-upgrade-an-existing-production-deployment (also linked from the migration guide).