support setting a response body

Author: humanizersequel

src/http/server.rs

@@ -1080,6 +1080,13 @@ impl HttpServer {
 
 /// Send an HTTP response to an incoming HTTP request ([`HttpServerRequest::Http`]).
 pub fn send_response(status: StatusCode, headers: Option<HashMap<String, String>>, body: Vec<u8>) {
+    // Check if there's a manual body override in the HTTP context
+    let final_body = crate::hyperapp::APP_HELPERS.with(|helpers| {
+        helpers.borrow().current_http_context.as_ref()
+            .and_then(|ctx| ctx.response_body.clone())
+            .unwrap_or(body)  // Use override if present, otherwise use the parameter
+    });
+
     KiResponse::new()
         .body(
             serde_json::to_vec(&HttpResponse {
@@ -1088,7 +1095,7 @@ pub fn send_response(status: StatusCode, headers: Option<HashMap<String, String>
             })
             .unwrap(),
         )
-        .blob_bytes(body)
+        .blob_bytes(final_body)
         .send()
         .unwrap()
 }

src/hyperapp.rs

@@ -38,6 +38,7 @@ pub struct HttpRequestContext {
     pub request: IncomingHttpRequest,
     pub response_headers: HashMap<String, String>,
     pub response_status: http::StatusCode,
+    pub response_body: Option<Vec<u8>>,
 }
 
 pub struct AppContext {
@@ -105,6 +106,15 @@ pub fn set_response_status(status: http::StatusCode) {
     })
 }
 
+// Set the HTTP response body directly (bypasses Result serialization)
+pub fn set_response_body(body: Vec<u8>) {
+    APP_HELPERS.with(|helpers| {
+        if let Some(ctx) = &mut helpers.borrow_mut().current_http_context {
+            ctx.response_body = Some(body);
+        }
+    })
+}
+
 pub fn clear_http_request_context() {
     APP_HELPERS.with(|helpers| {
         helpers.borrow_mut().current_http_context = None;