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cluster/websocket: Short-circuit clients without subscriptions

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This commit is contained in:
Arne Welzel 2025-04-23 18:12:51 +02:00
parent 47206d6a8a
commit 23f0370e91
6 changed files with 82 additions and 0 deletions
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8
src/cluster/websocket/WebSocket.cc
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@ -394,6 +394,14 @@ void WebSocketEventDispatcher::HandleSubscriptions(WebSocketClientEntry& entry,
entry.wsc->SetSubscriptions(subscriptions);
// Short-circuit setting up subscriptions and directly reply with
// an ack if the client didn't request any topic subscriptions.
if ( subscriptions.empty() ) {
assert(entry.wsc->AllSubscriptionsActive());
HandleSubscriptionsActive(entry);
return;
}
auto cb = [this, id = entry.id, wsc = entry.wsc](const std::string& topic,
const Backend::SubscriptionCallbackInfo& info) {
if ( info.status == Backend::CallbackStatus::Error ) {

1
testing/btest/Baseline/cluster.websocket.no-subscriptions/..client..stderr Normal file
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@ -0,0 +1 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.

1
testing/btest/Baseline/cluster.websocket.no-subscriptions/..client..stdout Normal file
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@ -0,0 +1 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.

2
testing/btest/Baseline/cluster.websocket.no-subscriptions/..manager..stderr Normal file
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@ -0,0 +1,2 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
received termination signal

3
testing/btest/Baseline/cluster.websocket.no-subscriptions/..manager..stdout Normal file
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@ -0,0 +1,3 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
Cluster::websocket_client_added, []
got ping, 42

67
testing/btest/cluster/websocket/no-subscriptions.zeek Normal file
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@ -0,0 +1,67 @@
# @TEST-DOC: Regression test: A WebSocket client sending no subscriptions wasn't receiving back an ack.
#
# @TEST-REQUIRES: have-zeromq
# @TEST-REQUIRES: python3 -c 'import websockets.sync'
#
# @TEST-GROUP: cluster-zeromq
#
# @TEST-PORT: XPUB_PORT
# @TEST-PORT: XSUB_PORT
# @TEST-PORT: LOG_PULL_PORT
# @TEST-PORT: WEBSOCKET_PORT
#
# @TEST-EXEC: cp $FILES/zeromq/cluster-layout-simple.zeek cluster-layout.zeek
# @TEST-EXEC: cp $FILES/zeromq/test-bootstrap.zeek zeromq-test-bootstrap.zeek
# @TEST-EXEC: cp $FILES/ws/wstest.py .
#
# @TEST-EXEC: zeek -b --parse-only manager.zeek
# @TEST-EXEC: python3 -m py_compile client.py
#
# @TEST-EXEC: btest-bg-run manager "ZEEKPATH=$ZEEKPATH:.. && CLUSTER_NODE=manager zeek -b ../manager.zeek"
# @TEST-EXEC: btest-bg-run client "python3 ../client.py"
#
# @TEST-EXEC: btest-bg-wait 30
# @TEST-EXEC: btest-diff ./manager/.stdout
# @TEST-EXEC: btest-diff ./manager/.stderr
# @TEST-EXEC: btest-diff ./client/.stdout
# @TEST-EXEC: btest-diff ./client/.stderr
# @TEST-START-FILE manager.zeek
@load ./zeromq-test-bootstrap
redef exit_only_after_terminate = T;
global expected_ping_count = 100;
global ping_count = 0;
event zeek_init()
{
Cluster::subscribe("/test/pings");
Cluster::listen_websocket([$listen_host="127.0.0.1", $listen_port=to_port(getenv("WEBSOCKET_PORT"))]);
}
event ping(c: count) &is_used
{
print "got ping", c;
terminate();
}
event Cluster::websocket_client_added(info: Cluster::EndpointInfo, subscriptions: string_vec)
{
print "Cluster::websocket_client_added", subscriptions;
}
# @TEST-END-FILE
# @TEST-START-FILE client.py
import wstest
def run(ws_url):
with wstest.connect("ws1", ws_url) as tc:
tc.send_json([]) # Send no subscriptions
ack = tc.recv_json()
assert ack.get("type") == "ack", f"{ack}"
tc.send_json(wstest.build_event_v1("/test/pings/", "ping", [42]))
if __name__ == "__main__":
wstest.main(run, wstest.WS4_URL_V1)
# @TEST-END-FILE