feat: add bounded binary API request bodies

crates/api-macros/tests/ui/invalid_binary_method.rs

@@ -0,0 +1,11 @@
+use api_macros::api;
+
+pub struct Response;
+
+#[api]
+pub trait InvalidBinaryMethod {
+    #[get("/payload")]
+    async fn download(&self, #[binary] body: api_macros::BinaryBody) -> Response;
+}
+
+fn main() {}

crates/api-macros/tests/ui/invalid_binary_method.stderr

@@ -0,0 +1,5 @@
+error: GET operations cannot declare a request body
+ --> tests/ui/invalid_binary_method.rs:8:14
+  |
+8 |     async fn download(&self, #[binary] body: api_macros::BinaryBody) -> Response;
+  |              ^^^^^^^^

crates/api-macros/tests/ui/invalid_binary_type.rs

@@ -0,0 +1,11 @@
+use api_macros::api;
+
+pub struct Response;
+
+#[api]
+pub trait InvalidBinaryType {
+    #[put("/payload")]
+    async fn upload(&self, #[binary] body: Vec<u8>) -> Response;
+}
+
+fn main() {}

crates/api-macros/tests/ui/invalid_binary_type.stderr

@@ -0,0 +1,5 @@
+error: binary request bodies must use api_macros::BinaryBody
+ --> tests/ui/invalid_binary_type.rs:8:44
+  |
+8 |     async fn upload(&self, #[binary] body: Vec<u8>) -> Response;
+  |                                            ^^^^^^^

crates/api-macros/tests/ui/mixed_request_bodies.rs

@@ -0,0 +1,16 @@
+use api_macros::api;
+
+pub struct JsonBody;
+pub struct Response;
+
+#[api]
+pub trait MixedRequestBodies {
+    #[post("/payload")]
+    async fn upload(
+        &self,
+        #[body] json: JsonBody,
+        #[binary] binary: api_macros::BinaryBody,
+    ) -> Response;
+}
+
+fn main() {}

crates/api-macros/tests/ui/mixed_request_bodies.stderr

@@ -0,0 +1,5 @@
+error: an API operation may declare only one JSON or binary request body
+  --> tests/ui/mixed_request_bodies.rs:12:19
+   |
+12 |         #[binary] binary: api_macros::BinaryBody,
+   |                   ^^^^^^

crates/api-macros/tests/ui/multiple_binary_bodies.rs

@@ -0,0 +1,15 @@
+use api_macros::api;
+
+pub struct Response;
+
+#[api]
+pub trait MultipleBinaryBodies {
+    #[post("/payload")]
+    async fn upload(
+        &self,
+        #[binary] first: api_macros::BinaryBody,
+        #[binary] second: api_macros::BinaryBody,
+    ) -> Response;
+}
+
+fn main() {}

crates/api-macros/tests/ui/multiple_binary_bodies.stderr

@@ -0,0 +1,5 @@
+error: an API operation may declare only one JSON or binary request body
+  --> tests/ui/multiple_binary_bodies.rs:11:19
+   |
+11 |         #[binary] second: api_macros::BinaryBody,
+   |                   ^^^^^^

crates/api-macros/tests/ui/multiple_bodies.stderr

@@ -1,4 +1,4 @@
-error: an API operation may declare only one request body
+error: an API operation may declare only one JSON or binary request body
   --> tests/ui/multiple_bodies.rs:13:17
    |
 13 |         #[body] second: SecondBody,