used regex_static in Jid (#1)

Reviewed-on: lavina/lavina#1
Co-authored-by: JustTestingV <JustTestingV@gmail.com>
Co-committed-by: JustTestingV <JustTestingV@gmail.com>

Cargo.lock

@@ -759,6 +759,7 @@ dependencies = [
  "futures-util",
  "http-body-util",
  "hyper 1.0.0-rc.3",
+ "lazy_static",
  "nom",
  "prometheus",
  "quick-xml",

Cargo.toml

@@ -16,6 +16,7 @@ tracing-subscriber = "0.3.16"
 futures-util = "0.3.25"
 prometheus = { version = "0.13.3", default-features = false }
 regex = "1.7.1"
+lazy_static = "1.4.0"
 nom = "7.1.3"
 tokio-rustls = "0.24.1"
 rustls-pemfile = "1.0.2"

src/protos/xmpp/bind.rs

@@ -42,10 +42,12 @@ impl Display for Jid {
 
 impl Jid {
     pub fn from_string(i: &str) -> Result<Jid> {
-        // TODO make regex static
         use regex::Regex;
-        let re = Regex::new(r"^(([a-zA-Z]+)@)?([a-zA-Z.]+)(/([a-zA-Z\-]+))?$").unwrap();
-        let m = re
+        use lazy_static::lazy_static;
+        lazy_static! {
+            static ref RE: Regex = Regex::new(r"^(([a-zA-Z]+)@)?([a-zA-Z.]+)(/([a-zA-Z\-]+))?$").unwrap();
+        }
+        let m = RE
             .captures(i)
             .ok_or(ffail!("Incorrectly format jid: {i}"))?;