Function mhost::lookup::multiple_lookup [−] [src]

pub fn multiple_lookup<T: Into<SocketAddr>>(
    loop_handle: &Handle, 
    query: Query, 
    servers: Vec<T>
) -> Box<Future<Item = Vec<Result<Response>>, Error = ()>>

Lookup a domain name against a set of DNS servers

The return type is special here. Future<Item=Vec<Result<DnsResponse>>, Error=(). This Future is not supposed to fail in future::futures::Err way, but rather propagate errors as part of the Future's successful execution. In this way, this function does not abort when single lookups fail, but wait for all queries / Futures to finish. The library user than can distinguish between successful and failed lookups.