Trait UrlFetchBackend 

pub trait UrlFetchBackend: Send + Sync {
    // Required method
    fn fetch<'life0, 'life1, 'async_trait>(
        &'life0 self,
        url: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<FetchedPage, ActionError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}

Optional backend for fetching the body of a URL the user (or an upstream search hit) handed us. Kept separate from WebSearchBackend so a deployment can have search without fetch (or vice versa) and so the two contracts can evolve independently.

Required Methods

fn fetch<'life0, 'life1, 'async_trait>( &'life0 self, url: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<FetchedPage, ActionError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Fetch a single URL. The backend is responsible for timeouts, body size caps, and HTML-to-text reduction so the returned page is safe to pass straight into an LLM context window.

Implementors