Multi-window IPC not working properly for remote urls (Tauri Version 2)

[hakoptak]

Hello community,

Before I file this as a bug let me first check if I'm doing something wrong...

My situation:

• I have two windows that communicate with each other via IPC
• Both windows have been configured to have permissions for "core:event:allow-emit" and "core:event:allow-listen"
• Both windows are loaded from a remote url
• I have my security CSP setup to allow ipc::/localhost and for my domain

My problem:

The first windows can emit messages and listen to the Tauri backend, but the second window is not allowed to do this:

[Error] Fetch API cannot load ipc://localhost/plugin%3Aevent%7Clisten due to access control checks.

Is this a well-know issue? I did find this issue, but my context is a slightly different (one window works, the other does not).

Thanks in advance!

[FabianLars]

[Error] Fetch API cannot load ipc://localhost/plugin%3Aevent%7Clisten due to access control checks.

Like i said in the linked issue, this isn't necessarily bad, it should fall back to another api that's not bound to cors / access-control. This also differs per website as they configure the access control headers on their end so it's possible that only one window has the issue, assuming that they use different URLs!

[hakoptak]

Hi @FabianLars, thanks for answering. You are right: it does work despite the error message... I did migrate from V1 to V2 and other things were blocking the IPC messages from propagating.