Implement JsonSchema on Url

README.md

@@ -274,3 +274,4 @@ Schemars can implement `JsonSchema` on types from several popular crates, enable
 - [`uuid`](https://crates.io/crates/uuid) (^0.8)
 - [`smallvec`](https://crates.io/crates/smallvec) (^1.0)
 - [`arrayvec`](https://crates.io/crates/arrayvec) (^0.5)
+- [`url`](https://crates.io/crates/url) (^2.0)

schemars/Cargo.toml

@@ -24,6 +24,7 @@ either = { version = "1.3", default-features = false, optional = true }
 uuid = { version = "0.8", default-features = false, optional = true }
 smallvec = { version = "1.0", optional = true }
 arrayvec = { version = "0.5", default-features = false, optional = true }
+url = { version = "2.0", default-features = false, optional = true }
 
 [dev-dependencies]
 pretty_assertions = "0.6.1"
@@ -77,5 +78,9 @@ required-features = ["impl_json_schema"]
 name = "ui"
 required-features = ["ui_test"]
 
+[[test]]
+name = "url"
+required-features = ["url"]
+
 [package.metadata.docs.rs]
 all-features = true

schemars/src/json_schema_impls/mod.rs

@@ -64,6 +64,8 @@ mod serdejson;
 mod smallvec;
 mod time;
 mod tuple;
+#[cfg(feature = "url")]
+mod url;
 #[cfg(feature = "uuid")]
 mod uuid;
 mod wrapper;

schemars/src/json_schema_impls/url.rs

@@ -0,0 +1,30 @@
+use crate::gen::SchemaGenerator;
+use crate::schema::*;
+use crate::JsonSchema;
+use url::Url;
+
+macro_rules! formatted_string_impl {
+    ($ty:ident, $format:literal) => {
+        formatted_string_impl!($ty, $format, JsonSchema for $ty);
+    };
+    ($ty:ident, $format:literal, $($desc:tt)+) => {
+        impl $($desc)+ {
+            no_ref_schema!();
+
+            fn schema_name() -> String {
+                stringify!($ty).to_owned()
+            }
+
+            fn json_schema(_: &mut SchemaGenerator) -> Schema {
+                SchemaObject {
+                    instance_type: Some(InstanceType::String.into()),
+                    format: Some($format.to_owned()),
+                    ..Default::default()
+                }
+                .into()
+            }
+        }
+    };
+}
+
+formatted_string_impl!(Url, "uri");

schemars/tests/expected/url.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "UrlTypes",
+  "type": "object",
+  "required": [
+    "url"
+  ],
+  "properties": {
+    "url": {
+      "type": "string",
+      "format": "uri"
+    }
+  }
+}

schemars/tests/url.rs

@@ -0,0 +1,14 @@
+mod util;
+use schemars::JsonSchema;
+use url::Url;
+use util::*;
+
+#[derive(Debug, JsonSchema)]
+struct UrlTypes {
+    url: Url,
+}
+
+#[test]
+fn url_types() -> TestResult {
+    test_default_generated_schema::<UrlTypes>("url")
+}