mirror of
https://github.com/zeek/zeek.git
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cluster/websocket: Automatic WebSocket client topic subscription
Subscribe every WebSocket client to a unique topic, by default under
zeek/cluster/websocket/client/<identifier>/
Add tests that verify that WebSocket clients receive messages on these topics
even if they didn't explicitly pass them in their handshake message.
This is somewhere between feature and bug fix. It aids the ZeroMQ backend
implementation: A WebSocket client that doesn't provide any subscriptions
and immediately starts publishing would discard events until receiving
other nodes subscriptions from the central XPUB/XSUB proxy. ZeroMQ does sender
side topic filtering. When using subscriptions, the client waits until
its own subscriptions are returned from the central XPUB/XSUB proxy,
thereby also learning about other node's subscriptions.
Also, make the no-subscriptions.zeek test use 32 clients sequentially to
trigger potential issues more quickly.
This commit is contained in:
Arne Welzel
parent
69a1ad2c3d
commit
8edec9885a
17 changed files with 352 additions and 19 deletions
5
NEWS
5
NEWS
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@ -86,6 +86,11 @@ New Functionality
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that client may still be in transit and later executed, even on the node running
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the WebSocket server.
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WebSocket clients connecting to a server started using ``Cluster::listen_websocket()``
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are automatically subscribed to a client specific topic produced by a new function
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``Cluster::websocket_client_topic()`` in the ``Cluster`` module, even if they did
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not provide any subscriptions themselves.
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Changed Functionality
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---------------------
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@ -59,6 +59,18 @@ export {
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## a unique node in a cluster. Used with broker-enabled cluster communication.
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const nodeid_topic_prefix = "zeek/cluster/nodeid/" &redef;
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## Parts used for automatic WebSocket client topic subscription.
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##
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## Every WebSocket client is automatically subscribed to a topic
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## produced by joining and suffixing this vector and the WebSocket
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## client's identifier with :zeek:see:`Cluster::websocket_topic_sep`.
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const websocket_topic_prefix_parts = vector("zeek", "cluster", "websocket", "client") &redef;
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## Separator used for creating automatic WebSocket client topic subscriptions.
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##
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## See also :zeek:see:`Cluster::websocket_topic_prefix_parts`.
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const websocket_topic_sep = "/" &redef;
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## Name of the node on which master data stores will be created if no other
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## has already been specified by the user in :zeek:see:`Cluster::stores`.
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## An empty value means "use whatever name corresponds to the manager
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@ -298,6 +310,14 @@ export {
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## a given cluster node.
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global nodeid_topic: function(id: string): string &redef;
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## Retrieve the topic associated with a WebSocket client in the cluster.
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##
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## id: the id for the WebSocket client (:zeek:see:`Cluster::websocket_client_added`)
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##
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## Returns: a topic string that may used to send a message exclusively to
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## a given WebSocket client.
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global websocket_client_topic: function(id: string): string;
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## Retrieve the cluster-level naming of a node based on its node ID,
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## a backend-specific identifier.
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##
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@ -473,6 +493,14 @@ function nodeid_topic(id: string): string
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return nodeid_topic_prefix + id + "/";
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}
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function websocket_client_topic(id: string): string
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{
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local v = copy(websocket_topic_prefix_parts);
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v += id;
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v += "";
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return join_string_vec(v, websocket_topic_sep);
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}
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function nodeid_to_node(id: string): NamedNode
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{
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for ( name, n in nodes )
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@ -261,6 +261,7 @@ redef Cluster::worker_pool_spec = Cluster::PoolSpec(
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$topic = "zeek.cluster.pool.worker",
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$node_type = Cluster::WORKER);
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redef Cluster::websocket_topic_sep = ".";
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# Configure listen_log_endpoint based on port in cluster-layout, if any.
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@if ( Cluster::local_node_type() == Cluster::LOGGER || (Cluster::manager_is_logger && Cluster::local_node_type() == Cluster::MANAGER) )
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@ -8,7 +8,10 @@
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#include <string_view>
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#include <variant>
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#include "zeek/Func.h"
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#include "zeek/ID.h"
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#include "zeek/Reporter.h"
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#include "zeek/Type.h"
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#include "zeek/cluster/Backend.h"
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#include "zeek/cluster/BifSupport.h"
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#include "zeek/cluster/Manager.h"
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@ -194,8 +197,10 @@ const std::vector<std::string> WebSocketClient::GetSubscriptions() const {
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std::vector<std::string> subs;
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subs.reserve(subscriptions_state.size());
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for ( const auto& [topic, _] : subscriptions_state )
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subs.emplace_back(topic);
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for ( const auto& [topic, _] : subscriptions_state ) {
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if ( topic != auto_topic )
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subs.emplace_back(topic);
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}
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return subs;
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}
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@ -375,6 +380,17 @@ void WebSocketEventDispatcher::Process(const WebSocketSubscribeFinished& fin) {
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HandleSubscriptionsActive(entry);
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}
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// Invokes Cluster::websocket_client_topic() and returns the result as std::string, empty on error.
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std::string WebSocketEventDispatcher::GetAutoTopic(const std::string& nid) const {
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static const auto& func = zeek::id::find_func("Cluster::websocket_client_topic");
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auto result = func->Invoke(zeek::make_intrusive<zeek::StringVal>(nid));
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if ( ! result || ! IsString(result->GetType()->Tag()) )
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return std::string{};
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return result->AsStringVal()->ToStdString();
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}
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void WebSocketEventDispatcher::HandleSubscriptions(WebSocketClientEntry& entry, std::string_view buf) {
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rapidjson::Document doc;
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doc.Parse(buf.data(), buf.size());
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@ -395,15 +411,16 @@ void WebSocketEventDispatcher::HandleSubscriptions(WebSocketClientEntry& entry,
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subscriptions.emplace_back(doc[i].GetString());
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}
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entry.wsc->SetSubscriptions(subscriptions);
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// Short-circuit setting up subscriptions and directly reply with
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// an ack if the client didn't request any topic subscriptions.
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if ( subscriptions.empty() ) {
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assert(entry.wsc->AllSubscriptionsActive());
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HandleSubscriptionsActive(entry);
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return;
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// Add the auto topic to this WebSocket client.
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auto auto_topic = GetAutoTopic(entry.backend->NodeId());
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if ( ! auto_topic.empty() ) {
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subscriptions.emplace_back(auto_topic);
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entry.wsc->SetAutoTopic(auto_topic);
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}
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else
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zeek::reporter->InternalWarning("Failed to get auto topic for WebSocket client %s!", entry.id.c_str());
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entry.wsc->SetSubscriptions(subscriptions);
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auto cb = [this, id = entry.id, wsc = entry.wsc](const std::string& topic,
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const Backend::SubscriptionCallbackInfo& info) {
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@ -100,7 +100,7 @@ public:
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void SetSubscriptions(const std::vector<std::string>& topic_prefixes);
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/**
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* @return The client's subscriptions.
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* @return The client's subscriptions, excluding the auto topic.
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*/
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const std::vector<std::string> GetSubscriptions() const;
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@ -114,9 +114,22 @@ public:
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*/
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bool AllSubscriptionsActive() const;
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/**
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* Set the WebSocket client's automatically created subscription topic.
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*
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* @param topic The auto topic.
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*/
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void SetAutoTopic(const std::string& topic) { auto_topic = topic; }
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/**
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* @return the WebSocket client's auto topic.
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*/
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const std::string& GetAutoTopic() const { return auto_topic; }
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private:
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bool acked = false;
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std::map<std::string, bool> subscriptions_state;
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std::string auto_topic; // Internally generated topic for this websocket client.
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};
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// An new WebSocket client connected. Client is locally identified by `id`.
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@ -226,6 +239,9 @@ private:
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std::list<WebSocketMessage> queue;
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};
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// Invoke Zeek script function Cluster::websocket_client_topic()
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// with a WebSocket client's identifier to produce the auto topic.
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std::string GetAutoTopic(const std::string& nid) const;
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void HandleSubscriptions(WebSocketClientEntry& entry, std::string_view buf);
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@ -0,0 +1 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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@ -0,0 +1,5 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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connected
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got ack
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ack[endpoint] in topic_parts True
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event [{'@data-type': 'string', 'data': 'pong'}, {'@data-type': 'vector', 'data': [{'@data-type': 'count', 'data': 42}]}]
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@ -0,0 +1,2 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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received termination signal
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@ -0,0 +1,4 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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Cluster::websocket_client_added, []
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ping, 42
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Cluster::websocket_client_lost
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@ -1,3 +1,65 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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Cluster::websocket_client_added, []
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got ping, 42
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got ping, 42, 1
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Cluster::websocket_client_added, []
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got ping, 42, 2
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Cluster::websocket_client_added, []
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got ping, 42, 3
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Cluster::websocket_client_added, []
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got ping, 42, 4
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Cluster::websocket_client_added, []
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got ping, 42, 5
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Cluster::websocket_client_added, []
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got ping, 42, 6
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Cluster::websocket_client_added, []
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got ping, 42, 7
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Cluster::websocket_client_added, []
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got ping, 42, 8
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Cluster::websocket_client_added, []
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got ping, 42, 9
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Cluster::websocket_client_added, []
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got ping, 42, 10
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Cluster::websocket_client_added, []
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got ping, 42, 11
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Cluster::websocket_client_added, []
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got ping, 42, 12
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Cluster::websocket_client_added, []
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got ping, 42, 13
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Cluster::websocket_client_added, []
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got ping, 42, 14
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Cluster::websocket_client_added, []
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got ping, 42, 15
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Cluster::websocket_client_added, []
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got ping, 42, 16
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Cluster::websocket_client_added, []
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got ping, 42, 17
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Cluster::websocket_client_added, []
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got ping, 42, 18
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Cluster::websocket_client_added, []
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got ping, 42, 19
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Cluster::websocket_client_added, []
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got ping, 42, 20
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Cluster::websocket_client_added, []
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got ping, 42, 21
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Cluster::websocket_client_added, []
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got ping, 42, 22
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Cluster::websocket_client_added, []
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got ping, 42, 23
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Cluster::websocket_client_added, []
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got ping, 42, 24
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Cluster::websocket_client_added, []
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got ping, 42, 25
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Cluster::websocket_client_added, []
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got ping, 42, 26
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Cluster::websocket_client_added, []
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got ping, 42, 27
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Cluster::websocket_client_added, []
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got ping, 42, 28
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Cluster::websocket_client_added, []
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got ping, 42, 29
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Cluster::websocket_client_added, []
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got ping, 42, 30
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Cluster::websocket_client_added, []
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got ping, 42, 31
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Cluster::websocket_client_added, []
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got ping, 42, 32
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@ -0,0 +1 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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@ -0,0 +1,5 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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connected
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got ack
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ack[endpoint] in topic_parts True
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event [{'@data-type': 'string', 'data': 'pong'}, {'@data-type': 'vector', 'data': [{'@data-type': 'count', 'data': 42}]}]
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@ -0,0 +1,2 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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received termination signal
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@ -0,0 +1,4 @@
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### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
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Cluster::websocket_client_added, []
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ping, 42
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Cluster::websocket_client_lost
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@ -0,0 +1,88 @@
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# @TEST-DOC: Test that publishing events to a WebSocket client's auto topic works.
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#
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# @TEST-REQUIRES: python3 -c 'import websockets.sync'
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#
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# @TEST-PORT: BROKER_PORT1
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# @TEST-PORT: WEBSOCKET_PORT
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#
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# @TEST-EXEC: cp $FILES/ws/wstest.py .
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#
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# @TEST-EXEC: zeek -b --parse-only manager.zeek
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# @TEST-EXEC: python3 -m py_compile client.py
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#
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# @TEST-EXEC: btest-bg-run manager "ZEEKPATH=$ZEEKPATH:.. && CLUSTER_NODE=manager zeek -b ../manager.zeek"
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# @TEST-EXEC: btest-bg-run client "python3 ../client.py"
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#
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# @TEST-EXEC: btest-bg-wait 5
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# @TEST-EXEC: btest-diff ./manager/.stdout
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# @TEST-EXEC: btest-diff ./manager/.stderr
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# @TEST-EXEC: btest-diff ./client/.stdout
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# @TEST-EXEC: btest-diff ./client/.stderr
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# @TEST-START-FILE cluster-layout.zeek
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redef Cluster::nodes = {
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["manager"] = [$node_type=Cluster::MANAGER, $ip=127.0.0.1, $p=to_port(getenv("BROKER_PORT1"))],
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};
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# @TEST-END-FILE
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#
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# @TEST-START-FILE manager.zeek
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redef exit_only_after_terminate = T;
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redef Log::enable_local_logging = T;
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redef Log::default_rotation_interval = 0sec;
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redef Broker::disable_ssl = T;
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global ws_client_topic = "";
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event zeek_init()
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{
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Cluster::subscribe("/test/pings");
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Cluster::listen_websocket([$listen_host="127.0.0.1", $listen_port=to_port(getenv("WEBSOCKET_PORT"))]);
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}
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global pong: event(c: count) &is_used;
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event ping(c: count) &is_used
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{
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print "ping", c;
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# Reply with a pong on the WebSocket client's auto topic.
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Cluster::publish(ws_client_topic, pong, c);
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}
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event Cluster::websocket_client_added(info: Cluster::EndpointInfo, subscriptions: string_vec)
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{
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print "Cluster::websocket_client_added", subscriptions;
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ws_client_topic = Cluster::websocket_client_topic(info$id);
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}
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event Cluster::websocket_client_lost(info: Cluster::EndpointInfo)
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{
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print "Cluster::websocket_client_lost";
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terminate();
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}
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# @TEST-END-FILE
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# @TEST-START-FILE client.py
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import wstest
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def run(ws_url):
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with wstest.connect("ws1", ws_url) as tc:
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print("connected")
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tc.send_json([]) # Send no subscriptions
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ack = tc.recv_json()
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print("got ack")
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assert ack.get("type") == "ack", f"{ack}"
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# Send a ping to the manager.
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tc.send_json(wstest.build_event_v1("/test/pings/", "ping", [42]))
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pong = tc.recv_json(timeout=3)
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topic, event = pong["topic"], pong["data"][2]["data"][0:2]
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topic_parts = topic.split("/")
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print("ack[endpoint] in topic_parts", ack["endpoint"] in topic_parts)
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print("event", event)
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if __name__ == "__main__":
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wstest.main(run, wstest.WS4_URL_V1)
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# @TEST-END-FILE
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@ -36,10 +36,15 @@ event zeek_init()
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Cluster::listen_websocket([$listen_host="127.0.0.1", $listen_port=to_port(getenv("WEBSOCKET_PORT"))]);
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}
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global ping_count = 0;
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const ping_count_expected = 32;
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event ping(c: count) &is_used
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{
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print "got ping", c;
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terminate();
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++ping_count;
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print "got ping", c, ping_count;
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if ( ping_count == ping_count_expected )
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terminate();
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}
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event Cluster::websocket_client_added(info: Cluster::EndpointInfo, subscriptions: string_vec)
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@ -53,11 +58,12 @@ event Cluster::websocket_client_added(info: Cluster::EndpointInfo, subscriptions
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import wstest
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def run(ws_url):
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with wstest.connect("ws1", ws_url) as tc:
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tc.send_json([]) # Send no subscriptions
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ack = tc.recv_json()
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assert ack.get("type") == "ack", f"{ack}"
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tc.send_json(wstest.build_event_v1("/test/pings/", "ping", [42]))
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for i in range(32):
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with wstest.connect("ws1", ws_url) as tc:
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tc.send_json([]) # Send no subscriptions
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ack = tc.recv_json()
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assert ack.get("type") == "ack", f"{ack}"
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tc.send_json(wstest.build_event_v1("/test/pings/", "ping", [42]))
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if __name__ == "__main__":
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wstest.main(run, wstest.WS4_URL_V1)
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@ -0,0 +1,86 @@
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# @TEST-DOC: Test that publishing events to a WebSocket client's auto topic works.
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||||
#
|
||||
# @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 ws_client_topic = "";
|
||||
|
||||
event zeek_init()
|
||||
{
|
||||
Cluster::subscribe("/test/pings");
|
||||
Cluster::listen_websocket([$listen_host="127.0.0.1", $listen_port=to_port(getenv("WEBSOCKET_PORT"))]);
|
||||
}
|
||||
|
||||
global pong: event(c: count) &is_used;
|
||||
|
||||
event ping(c: count) &is_used
|
||||
{
|
||||
print "ping", c;
|
||||
# Reply with a pong on the WebSocket client's auto topic.
|
||||
Cluster::publish(ws_client_topic, pong, c);
|
||||
}
|
||||
|
||||
event Cluster::websocket_client_added(info: Cluster::EndpointInfo, subscriptions: string_vec)
|
||||
{
|
||||
print "Cluster::websocket_client_added", subscriptions;
|
||||
ws_client_topic = Cluster::websocket_client_topic(info$id);
|
||||
}
|
||||
|
||||
event Cluster::websocket_client_lost(info: Cluster::EndpointInfo)
|
||||
{
|
||||
print "Cluster::websocket_client_lost";
|
||||
terminate();
|
||||
}
|
||||
# @TEST-END-FILE
|
||||
|
||||
|
||||
# @TEST-START-FILE client.py
|
||||
import wstest
|
||||
|
||||
def run(ws_url):
|
||||
with wstest.connect("ws1", ws_url) as tc:
|
||||
print("connected")
|
||||
tc.send_json([]) # Send no subscriptions
|
||||
ack = tc.recv_json()
|
||||
print("got ack")
|
||||
assert ack.get("type") == "ack", f"{ack}"
|
||||
|
||||
# Send a ping to the manager.
|
||||
tc.send_json(wstest.build_event_v1("/test/pings/", "ping", [42]))
|
||||
pong = tc.recv_json(timeout=3)
|
||||
topic, event = pong["topic"], pong["data"][2]["data"][0:2]
|
||||
topic_parts = topic.split(".")
|
||||
print("ack[endpoint] in topic_parts", ack["endpoint"] in topic_parts)
|
||||
print("event", event)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
wstest.main(run, wstest.WS4_URL_V1)
|
||||
# @TEST-END-FILE
|
||||
Loading…
Add table
Add a link
Reference in a new issue