update

src/blacklist.rs

@@ -0,0 +1,18 @@
+pub fn check_blacklist(domain: &str) -> bool {
+    let blacklist_raw = std::env::var("BLACKLIST_DOMAINS").unwrap_or_default();
+
+    if blacklist_raw.is_empty() {
+        return false;
+    }
+
+    let blacklist: Vec<&str> = blacklist_raw.split(',').collect();
+
+    for domain_regex in blacklist {
+        let rgx = regex::Regex::new(domain_regex).unwrap();
+        if rgx.is_match(domain) {
+            return true;
+        }
+    }
+
+    return false;
+}