url feature: Implement url::Url as a scalar type

juniper/Cargo.toml

@@ -22,13 +22,14 @@ path = "benches/bench.rs"
 [features]
 nightly = []
 expose-test-schema = []
-default = ["uuid"]
+default = ["url", "uuid"]
 
 [dependencies]
 ordermap = { version = "^0.2.11", features = ["serde-1"] }
 serde = { version = "^1.0.8" }
 serde_derive = {version="^1.0.8" }
 serde_json = { version="^1.0.2", optional = true }
+url = { version = "^1.5.1", optional = true }
 uuid = { version = "0.5.1", optional = true }
 
 [dev-dependencies]

juniper/src/integrations/mod.rs

@@ -1,4 +1,7 @@
 pub mod serde;
 
+#[cfg(feature = "url")]
+mod url;
+
 #[cfg(feature = "uuid")]
 mod uuid;

juniper/src/integrations/url.rs

@@ -0,0 +1,32 @@
+use url::Url;
+
+use ::Value;
+
+graphql_scalar!(Url {
+    description: "Url"
+
+    resolve(&self) -> Value {
+        Value::string(self.as_str())
+    }
+
+    from_input_value(v: &InputValue) -> Option<Url> {
+        v.as_string_value()
+         .and_then(|s| Url::parse(s).ok())
+    }
+});
+
+#[cfg(test)]
+mod test {
+    use url::Url;
+
+    #[test]
+    fn url_from_input_value() {
+        let raw = "https://example.net/";
+        let input = ::InputValue::String(raw.to_string());
+
+        let parsed: Url = ::FromInputValue::from_input_value(&input).unwrap();
+        let url = Url::parse(raw).unwrap();
+
+        assert_eq!(parsed, url);
+    }
+}

juniper/src/lib.rs

@@ -124,6 +124,9 @@ extern crate serde_json;
 
 extern crate ordermap;
 
+#[cfg(any(test, feature = "url"))]
+extern crate url;
+
 #[cfg(any(test, feature = "uuid"))]
 extern crate uuid;