Update handle_network_event to use BrowsingContextActor for HttpRequest (#37263)

- Add browsing_context_actor_name parameter to handle_network_event
- Replace NetworkEventMsg in HttpRequest case with
BrowsingContextActor::resource_available
- Update DevTools caller in lib.rs to pass browsing_context_actor_name

Testing: 
Fixes:
https://github.com/servo/servo/issues/33556#issuecomment-2756544430

---------

Signed-off-by: Uthman Yahaya Baba <uthmanyahayababa@gmail.com>

components/devtools/actors/network_event.rs

@@ -18,6 +18,7 @@ use serde_json::{Map, Value};
 
 use crate::StreamId;
 use crate::actor::{Actor, ActorMessageStatus, ActorRegistry};
+use crate::network_handler::Cause;
 use crate::protocol::JsonPacketStream;
 
 struct HttpRequest {
@@ -44,7 +45,7 @@ pub struct NetworkEventActor {
     is_xhr: bool,
 }
 
-#[derive(Serialize)]
+#[derive(Clone, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct EventActor {
     pub actor: String,
@@ -55,6 +56,7 @@ pub struct EventActor {
     #[serde(rename = "isXHR")]
     pub is_xhr: bool,
     pub private: bool,
+    pub cause: Cause,
 }
 
 #[derive(Serialize)]
@@ -392,6 +394,14 @@ impl NetworkEventActor {
             LocalResult::Ambiguous(date_time, _) => date_time.to_rfc3339().to_string(),
         };
 
+        let cause_type = match self.request.url.as_str() {
+            // Adjust based on request data
+            url if url.ends_with(".css") => "stylesheet",
+            url if url.ends_with(".js") => "script",
+            url if url.ends_with(".png") || url.ends_with(".jpg") => "img",
+            _ => "document",
+        };
+
         EventActor {
             actor: self.name(),
             url: self.request.url.clone(),
@@ -400,6 +410,10 @@ impl NetworkEventActor {
             time_stamp: self.request.time_stamp,
             is_xhr: self.is_xhr,
             private: false,
+            cause: Cause {
+                type_: cause_type.to_string(),
+                loading_document_uri: None, // Set if available
+            },
         }
     }
 

components/devtools/actors/root.rs

@@ -295,7 +295,7 @@ impl RootActor {
                 sources: false,
                 highlightable: true,
                 custom_highlighters: true,
-                network_monitor: false,
+                network_monitor: true,
             },
         }
     }

components/devtools/lib.rs

@@ -478,18 +478,21 @@ impl DevtoolsInstance {
         request_id: String,
         network_event: NetworkEvent,
     ) {
-        let console_actor_name = match self.find_console_actor(pipeline_id, None) {
-            Some(name) => name,
-            None => return,
-        };
         let netevent_actor_name = self.find_network_event_actor(request_id);
 
+        let Some(id) = self.pipelines.get(&pipeline_id) else {
+            return;
+        };
+        let Some(browsing_context_actor_name) = self.browsing_contexts.get(id) else {
+            return;
+        };
+
         handle_network_event(
             Arc::clone(&self.actors),
-            console_actor_name,
             netevent_actor_name,
             connections,
             network_event,
+            browsing_context_actor_name.to_string(),
         )
     }
 

components/devtools/network_handler.rs

@@ -9,17 +9,10 @@ use devtools_traits::NetworkEvent;
 use serde::Serialize;
 
 use crate::actor::ActorRegistry;
-use crate::actors::network_event::{EventActor, NetworkEventActor, ResponseStartMsg};
+use crate::actors::browsing_context::BrowsingContextActor;
+use crate::actors::network_event::{NetworkEventActor, ResponseStartMsg};
 use crate::protocol::JsonPacketStream;
-
-#[derive(Serialize)]
-#[serde(rename_all = "camelCase")]
-struct NetworkEventMsg {
-    from: String,
-    #[serde(rename = "type")]
-    type_: String,
-    event_actor: EventActor,
-}
+use crate::resource::ResourceAvailable;
 
 #[derive(Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -50,34 +43,44 @@ struct EventTimingsUpdateMsg {
 struct SecurityInfoUpdateMsg {
     state: String,
 }
+#[derive(Clone, Serialize)]
+pub struct Cause {
+    #[serde(rename = "type")]
+    pub type_: String,
+    #[serde(rename = "loadingDocumentUri")]
+    pub loading_document_uri: Option<String>,
+}
 
 pub(crate) fn handle_network_event(
     actors: Arc<Mutex<ActorRegistry>>,
-    console_actor_name: String,
     netevent_actor_name: String,
     mut connections: Vec<TcpStream>,
     network_event: NetworkEvent,
+    browsing_context_actor_name: String,
 ) {
     let mut actors = actors.lock().unwrap();
-    let actor = actors.find_mut::<NetworkEventActor>(&netevent_actor_name);
-
     match network_event {
         NetworkEvent::HttpRequest(httprequest) => {
-            // Store the request information in the actor
-            actor.add_request(httprequest);
-
-            // Send a networkEvent message to the client
-            let msg = NetworkEventMsg {
-                from: console_actor_name,
-                type_: "networkEvent".to_owned(),
-                event_actor: actor.event_actor(),
+            // Scope mutable borrow
+            let event_actor = {
+                let actor = actors.find_mut::<NetworkEventActor>(&netevent_actor_name);
+                actor.add_request(httprequest);
+                actor.event_actor()
             };
+
+            let browsing_context_actor =
+                actors.find::<BrowsingContextActor>(&browsing_context_actor_name);
             for stream in &mut connections {
-                let _ = stream.write_json_packet(&msg);
+                browsing_context_actor.resource_available(
+                    event_actor.clone(),
+                    "network-event".to_string(),
+                    stream,
+                );
             }
         },
         NetworkEvent::HttpResponse(httpresponse) => {
             // Store the response information in the actor
+            let actor = actors.find_mut::<NetworkEventActor>(&netevent_actor_name);
             actor.add_response(httpresponse);
 
             let msg = NetworkEventUpdateMsg {