async tauri command

[pan-grayza]

I have this code which I mixed from tauri and isahc docs:

#[tauri::command]
async fn requst_from_web() -> Result<(), isahc::Error> {
    let mut response = isahc::get("https://example.org")?;
    // let body = response.text()?;
    // println!("{}", body);

    // Print some basic info about the response to standard output.
    println!("Status: {}", response.status());
    println!("Headers: {:#?}", response.headers());

    // Read the response body as text into a string and print it.
    print!("{}", response.text()?);

    Ok(())
}

Which results in this compiler error that is on #[tauri::command] line:

the method `async_kind` exists for reference `&impl Future<Output = Result<(), Error>>`, but its trait bounds were not satisfied
the following trait bounds were not satisfied:
`impl Future<Output = Result<(), isahc::Error>>: IpcResponse`
which is required by `&impl Future<Output = Result<(), isahc::Error>>: tauri::ipc::private::ResponseKind`
`<&impl Future<Output = Result<(), isahc::Error>> as Future>::Output = Result<_, _>`
which is required by `&impl Future<Output = Result<(), isahc::Error>>: tauri::ipc::private::ResultFutureKind`
`&impl Future<Output = Result<(), isahc::Error>>: Future`
which is required by `&impl Future<Output = Result<(), isahc::Error>>: tauri::ipc::private::ResultFutureKind`

So what I am doing wrong?
Do I need tokio here?
Maybe there are some recources on this topic?

[FabianLars]

It's complaining about the Error. Everything you return from tauri commands must implement serde::Serialize and most crate's Error types do not do that. We have an intro on the solution we generally consider best here: https://tauri.app/v1/guides/features/command#error-handling