Run multiple Rocket servers in the same process

[vincentjorgensen]

Hi! According to this question it is possible to run multiple Rocket servers in the same process using spawn() or select!. My rust foo is weak. I am wondering if I could get some help with that. Here is what I have so far. I feel like I'm close, but the nature of Future and how to use it with another Rocket server is beyond my knowledge.

#[rocket::main]
  async fn main() {
      // Recall that an uninspected `Error` will cause a pretty-printed panic,
      // so rest assured errors do not go undetected when using `#[launch]`.
      //    let _ = http_rocket().launch().await;  // This works! Yay!
      let http_rocket = http_rocket();
      if env::var("SSL_PORT").is_ok() {
>>        http_rocket.spawn(https_rocket().launch()); // This part is very wrong
      }
      let _ = http_rocket.launch().await;
  }

  fn http_rocket() -> Rocket<Build> {
...
}
  fn https_rocket() -> Rocket<Build> {
...
}

[vincentjorgensen]

Solved it! Don't forget to add futures = "0.3.5" to your Cargo.toml.

use futures::future;
// ...
#[rocket::main]
async fn main() {
    if env::var("SSL_PORT").is_ok() {
        let _ = future::join(http_rocket().launch(), https_rocket().launch()).await;
    } else {
        let _ = http_rocket().launch().await;
    }
}

[the10thWiz]

futures is actually re-exported from rocket, so use rocket::futures::future; will import the same module. You don't need to explicitly depend on the futures crate.

[vincentjorgensen]

Nice! Just confirmed it. Thanks!