c-ares-resolver

DNS resolvers built on c-ares, for asynchronous DNS requests.

This crate provides three resolver types - the Resolver, the FutureResolver, and the BlockingResolver:

• The Resolver is the thinnest wrapper around the underlying c-ares library. It returns answers via callbacks. The other resolvers are built on top of this.
• The FutureResolver returns answers as std::future::Futures.
• The BlockingResolver isn't asynchronous at all - as the name suggests, it blocks until the lookup completes.

Documentation

API documentation is here.

Setting the feature build-cmake will cause the c-ares library to be built using cmake. This is significantly faster than the default autotools build on unix platforms: so if it works for you, you should probably prefer it.

Examples

extern crate c_ares_resolver;
extern crate futures_executor;
use futures_executor::block_on;

fn main() {
    let resolver = c_ares_resolver::FutureResolver::new().unwrap();
    let query = resolver.query_a("google.com");
    let response = block_on(query);
    match response {
        Ok(result) => println!("{}", result),
        Err(e) => println!("Lookup failed with error '{}'", e)
    }
}

Further example programs can be found here.

Contributing

Contributions are welcome. Please send pull requests!