fix(api): "command not found" error when running addPluginListener

.changes/register-plugin-listener-fix.md

@@ -0,0 +1,5 @@
+---
+"tauri": patch:bug
+---
+
+Fix `core > addPluginListener` failing on command permission check.

crates/tauri/src/webview/mod.rs

@@ -1715,14 +1715,34 @@ tauri::Builder::default()
         url: request.url.clone(),
       }
     };
+    let window_label = message.webview.window_label();
     let (resolved_acl, has_app_acl_manifest) = {
       let runtime_authority = manager.runtime_authority.lock().unwrap();
-      let acl = runtime_authority.resolve_access(
-        &request.cmd,
-        message.webview.window_ref().label(),
-        message.webview.label(),
-        &acl_origin,
-      );
+      let acl = runtime_authority
+        .resolve_access(
+          &request.cmd,
+          &window_label,
+          message.webview.label(),
+          &acl_origin,
+        )
+        .or_else(|| {
+          if request.cmd.chars().any(|c| c.is_uppercase()) {
+            // fallback to the snake case of the command
+            // we do not do this by default for backwards compatibility
+            runtime_authority.resolve_access(
+              &if let Some((prefix, cmd_name)) = request.cmd.split_once('|') {
+                format!("{prefix}|{}", heck::AsSnakeCase(cmd_name))
+              } else {
+                request.cmd.clone()
+              },
+              &window_label,
+              message.webview.label(),
+              &acl_origin,
+            )
+          } else {
+            None
+          }
+        });
       (acl, runtime_authority.has_app_manifest())
     };
 
@@ -1759,7 +1779,7 @@ tauri::Builder::default()
             .resolve_access_message(
               key,
               &command_name,
-              invoke.message.webview.window().label(),
+              &window_label,
               invoke.message.webview.label(),
               &acl_origin,
             ),

packages/api/src/core.ts

@@ -185,6 +185,7 @@ async function addPluginListener<T>(
   cb: (payload: T) => void
 ): Promise<PluginListener> {
   const handler = new Channel<T>(cb)
+  // note: we must stick with camelCase here for backwards compatibility
   return invoke(`plugin:${plugin}|registerListener`, { event, handler }).then(
     () => new PluginListener(plugin, event, handler.id)
   )