fix(matcher): improve subdomain matching case insensitivity

Author: 0x676e67

src/client/proxy/matcher.rs

@@ -520,7 +520,10 @@ impl DomainMatcher {
                     .map_or(false, |s| s.eq_ignore_ascii_case(domain))
             {
                 return true;
-            } else if domain.ends_with(d) {
+            } else if domain
+                .get(domain.len().saturating_sub(d.len())..)
+                .map_or(false, |s| s.eq_ignore_ascii_case(d))
+            {
                 if d.starts_with('.') {
                     // If the first character of d is a dot, that means the first character of domain
                     // must also be a dot, so we are looking at a subdomain of d and that matches
@@ -878,6 +881,10 @@ mod tests {
         assert!(matcher.contains("foo.bar"));
         assert!(matcher.contains("FOO.BAR"));
         assert!(matcher.contains("Foo.Bar"));
+
+        assert!(matcher.contains("www.foo.bar"));
+        assert!(matcher.contains("WWW.FOO.BAR"));
+        assert!(matcher.contains("Www.Foo.Bar"));
     }
 
     #[test]
@@ -897,5 +904,16 @@ mod tests {
         assert!(p
             .intercept(&"http://Example.com".parse().unwrap())
             .is_none());
+
+        // subdomain should bypass proxy (case insensitive match)
+        assert!(p
+            .intercept(&"http://www.example.com".parse().unwrap())
+            .is_none());
+        assert!(p
+            .intercept(&"http://WWW.EXAMPLE.COM".parse().unwrap())
+            .is_none());
+        assert!(p
+            .intercept(&"http://Www.Example.Com".parse().unwrap())
+            .is_none());
     }
 }