feat: [#675] tracker checker supports more service address formats

All the following URL for UDP trackers are allow now:

```console
TORRUST_CHECKER_CONFIG='{
    "udp_trackers": [
	"127.0.0.1:6969",
	"127.0.0.1:6969/",
	"127.0.0.1:6969/announce",
	"localhost:6969",
	"localhost:6969/",
	"localhost:6969/announce",
	"udp://127.0.0.1:6969",
	"udp://127.0.0.1:6969/",
	"udp://127.0.0.1:6969/announce",
	"udp://localhost:6969",
	"udp://localhost:6969/",
	"udp://localhost:6969/announce"
    ],
    "http_trackers": [],
    "health_checks": []
}' cargo run --bin tracker_checker
```

NOTICE: the client will resolve the domain to a socket address if
needed.

Author: josecelano

src/console/clients/checker/checks/udp.rs

@@ -4,6 +4,7 @@ use std::time::Duration;
 use aquatic_udp_protocol::TransactionId;
 use hex_literal::hex;
 use serde::Serialize;
+use url::Url;
 
 use crate::console::clients::udp::checker::Client;
 use crate::console::clients::udp::Error;
@@ -23,20 +24,22 @@ pub enum Check {
 }
 
 #[allow(clippy::missing_panics_doc)]
-pub async fn run(udp_trackers: Vec<SocketAddr>, timeout: Duration) -> Vec<Result<Checks, Checks>> {
+pub async fn run(udp_trackers: Vec<Url>, timeout: Duration) -> Vec<Result<Checks, Checks>> {
     let mut results = Vec::default();
 
     tracing::debug!("UDP trackers ...");
 
     let info_hash = aquatic_udp_protocol::InfoHash(hex!("9c38422213e30bff212b30c360d26f9a02136422")); // # DevSkim: ignore DS173237
 
-    for remote_addr in udp_trackers {
+    for remote_url in udp_trackers {
+        let remote_addr = resolve_socket_addr(&remote_url);
+
         let mut checks = Checks {
             remote_addr,
             results: Vec::default(),
         };
 
-        tracing::debug!("UDP tracker: {:?}", remote_addr);
+        tracing::debug!("UDP tracker: {:?}", remote_url);
 
         // Setup
         let client = match Client::new(remote_addr, timeout).await {
@@ -95,3 +98,37 @@ pub async fn run(udp_trackers: Vec<SocketAddr>, timeout: Duration) -> Vec<Result
 
     results
 }
+
+fn resolve_socket_addr(url: &Url) -> SocketAddr {
+    let socket_addr = url.socket_addrs(|| None).unwrap();
+    *socket_addr.first().unwrap()
+}
+
+#[cfg(test)]
+mod tests {
+    use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
+
+    use url::Url;
+
+    use crate::console::clients::checker::checks::udp::resolve_socket_addr;
+
+    #[test]
+    fn it_should_resolve_the_socket_address_for_udp_scheme_urls_containing_a_domain() {
+        let socket_addr = resolve_socket_addr(&Url::parse("udp://localhost:8080").unwrap());
+
+        assert!(
+            socket_addr == SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080)
+                || socket_addr == SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 8080)
+        );
+    }
+
+    #[test]
+    fn it_should_resolve_the_socket_address_for_udp_scheme_urls_containing_an_ip() {
+        let socket_addr = resolve_socket_addr(&Url::parse("udp://localhost:8080").unwrap());
+
+        assert!(
+            socket_addr == SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080)
+                || socket_addr == SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 8080)
+        );
+    }
+}

src/console/clients/checker/config.rs

@@ -1,6 +1,5 @@
 use std::error::Error;
 use std::fmt;
-use std::net::SocketAddr;
 
 use reqwest::Url as ServiceUrl;
 use serde::Deserialize;
@@ -31,7 +30,7 @@ struct PlainConfiguration {
 
 /// Validated configuration
 pub struct Configuration {
-    pub udp_trackers: Vec<SocketAddr>,
+    pub udp_trackers: Vec<ServiceUrl>,
     pub http_trackers: Vec<ServiceUrl>,
     pub health_checks: Vec<ServiceUrl>,
 }
@@ -62,7 +61,8 @@ impl TryFrom<PlainConfiguration> for Configuration {
         let udp_trackers = plain_config
             .udp_trackers
             .into_iter()
-            .map(|s| s.parse::<SocketAddr>().map_err(ConfigurationError::InvalidUdpAddress))
+            .map(|s| if s.starts_with("udp://") { s } else { format!("udp://{s}") })
+            .map(|s| s.parse::<ServiceUrl>().map_err(ConfigurationError::InvalidUrl))
             .collect::<Result<Vec<_>, _>>()?;
 
         let http_trackers = plain_config
@@ -87,68 +87,161 @@ impl TryFrom<PlainConfiguration> for Configuration {
 
 #[cfg(test)]
 mod tests {
-    use std::net::{IpAddr, Ipv4Addr};
-
     use super::*;
 
     #[test]
     fn configuration_should_be_build_from_plain_serializable_configuration() {
         let dto = PlainConfiguration {
-            udp_trackers: vec!["127.0.0.1:8080".to_string()],
+            udp_trackers: vec!["udp://127.0.0.1:8080".to_string()],
             http_trackers: vec!["http://127.0.0.1:8080".to_string()],
             health_checks: vec!["http://127.0.0.1:8080/health".to_string()],
         };
 
         let config = Configuration::try_from(dto).expect("A valid configuration");
 
-        assert_eq!(
-            config.udp_trackers,
-            vec![SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080)]
-        );
+        assert_eq!(config.udp_trackers, vec![ServiceUrl::parse("udp://127.0.0.1:8080").unwrap()]);
+
         assert_eq!(
             config.http_trackers,
             vec![ServiceUrl::parse("http://127.0.0.1:8080").unwrap()]
         );
+
         assert_eq!(
             config.health_checks,
             vec![ServiceUrl::parse("http://127.0.0.1:8080/health").unwrap()]
         );
     }
 
-    mod building_configuration_from_plan_configuration {
-        use crate::console::clients::checker::config::{Configuration, PlainConfiguration};
+    mod building_configuration_from_plain_configuration_for {
+
+        mod udp_trackers {
+            use crate::console::clients::checker::config::{Configuration, PlainConfiguration, ServiceUrl};
+
+            /* The plain configuration should allow UDP URLs with:
+
+            - IP or domain.
+            - With or without scheme.
+            - With or without `announce` suffix.
+            - With or without `/` at the end of the authority section (with empty path).
+
+            For example:
+
+            127.0.0.1:6969
+            127.0.0.1:6969/
+            127.0.0.1:6969/announce
+
+            localhost:6969
+            localhost:6969/
+            localhost:6969/announce
+
+            udp://127.0.0.1:6969
+            udp://127.0.0.1:6969/
+            udp://127.0.0.1:6969/announce
+
+            udp://localhost:6969
+            udp://localhost:6969/
+            udp://localhost:6969/announce
+
+            */
 
-        #[test]
-        fn it_should_fail_when_a_tracker_udp_address_is_invalid() {
-            let plain_config = PlainConfiguration {
-                udp_trackers: vec!["invalid_address".to_string()],
-                http_trackers: vec![],
-                health_checks: vec![],
-            };
+            #[test]
+            fn it_should_fail_when_a_tracker_udp_url_is_invalid() {
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec!["invalid URL".to_string()],
+                    http_trackers: vec![],
+                    health_checks: vec![],
+                };
 
-            assert!(Configuration::try_from(plain_config).is_err());
+                assert!(Configuration::try_from(plain_config).is_err());
+            }
+
+            #[test]
+            fn it_should_add_the_udp_scheme_to_the_udp_url_when_it_is_missing() {
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec!["127.0.0.1:6969".to_string()],
+                    http_trackers: vec![],
+                    health_checks: vec![],
+                };
+
+                let config = Configuration::try_from(plain_config).expect("Invalid plain configuration");
+
+                assert_eq!(config.udp_trackers[0], "udp://127.0.0.1:6969".parse::<ServiceUrl>().unwrap());
+            }
+
+            #[test]
+            fn it_should_allow_using_domains() {
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec!["udp://localhost:6969".to_string()],
+                    http_trackers: vec![],
+                    health_checks: vec![],
+                };
+
+                let config = Configuration::try_from(plain_config).expect("Invalid plain configuration");
+
+                assert_eq!(config.udp_trackers[0], "udp://localhost:6969".parse::<ServiceUrl>().unwrap());
+            }
+
+            #[test]
+            fn it_should_allow_the_url_to_have_an_empty_path() {
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec!["127.0.0.1:6969/".to_string()],
+                    http_trackers: vec![],
+                    health_checks: vec![],
+                };
+
+                let config = Configuration::try_from(plain_config).expect("Invalid plain configuration");
+
+                assert_eq!(config.udp_trackers[0], "udp://127.0.0.1:6969/".parse::<ServiceUrl>().unwrap());
+            }
+
+            #[test]
+            fn it_should_allow_the_url_to_contain_a_path() {
+                // This is the common format for UDP tracker URLs:
+                // udp://domain.com:6969/announce
+
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec!["127.0.0.1:6969/announce".to_string()],
+                    http_trackers: vec![],
+                    health_checks: vec![],
+                };
+
+                let config = Configuration::try_from(plain_config).expect("Invalid plain configuration");
+
+                assert_eq!(
+                    config.udp_trackers[0],
+                    "udp://127.0.0.1:6969/announce".parse::<ServiceUrl>().unwrap()
+                );
+            }
         }
 
-        #[test]
-        fn it_should_fail_when_a_tracker_http_address_is_invalid() {
-            let plain_config = PlainConfiguration {
-                udp_trackers: vec![],
-                http_trackers: vec!["not_a_url".to_string()],
-                health_checks: vec![],
-            };
+        mod http_trackers {
+            use crate::console::clients::checker::config::{Configuration, PlainConfiguration};
+
+            #[test]
+            fn it_should_fail_when_a_tracker_http_url_is_invalid() {
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec![],
+                    http_trackers: vec!["invalid URL".to_string()],
+                    health_checks: vec![],
+                };
 
-            assert!(Configuration::try_from(plain_config).is_err());
+                assert!(Configuration::try_from(plain_config).is_err());
+            }
         }
 
-        #[test]
-        fn it_should_fail_when_a_health_check_http_address_is_invalid() {
-            let plain_config = PlainConfiguration {
-                udp_trackers: vec![],
-                http_trackers: vec![],
-                health_checks: vec!["not_a_url".to_string()],
-            };
+        mod health_checks {
+            use crate::console::clients::checker::config::{Configuration, PlainConfiguration};
+
+            #[test]
+            fn it_should_fail_when_a_health_check_http_url_is_invalid() {
+                let plain_config = PlainConfiguration {
+                    udp_trackers: vec![],
+                    http_trackers: vec![],
+                    health_checks: vec!["invalid URL".to_string()],
+                };
 
-            assert!(Configuration::try_from(plain_config).is_err());
+                assert!(Configuration::try_from(plain_config).is_err());
+            }
         }
     }
 }