Tiny unify grpc existing error responses into new format

sgl-model-gateway/src/routers/grpc/common/responses/handlers.rs

@@ -10,7 +10,8 @@ use serde_json::json;
 use tracing::{debug, error, warn};
 
 use crate::{
-    data_connector::ResponseId, routers::grpc::regular::responses::context::ResponsesContext,
+    data_connector::ResponseId,
+    routers::{error, grpc::regular::responses::context::ResponsesContext},
 };
 
 /// Implementation for GET /v1/responses/{response_id}
@@ -23,27 +24,14 @@ pub async fn get_response_impl(ctx: &ResponsesContext, response_id: &str) -> Res
     // Retrieve response from storage
     match ctx.response_storage.get_response(&resp_id).await {
         Ok(Some(stored_response)) => axum::Json(stored_response.raw_response).into_response(),
-        Ok(None) => (
-            StatusCode::NOT_FOUND,
-            axum::Json(json!({
-                "error": {
-                    "message": format!("Response with id '{}' not found", response_id),
-                    "type": "not_found_error",
-                    "code": "response_not_found"
-                }
-            })),
-        )
-            .into_response(),
-        Err(e) => (
-            StatusCode::INTERNAL_SERVER_ERROR,
-            axum::Json(json!({
-                "error": {
-                    "message": format!("Failed to retrieve response: {}", e),
-                    "type": "internal_error"
-                }
-            })),
-        )
-            .into_response(),
+        Ok(None) => error::not_found(
+            "response_not_found",
+            format!("Response with id '{}' not found", response_id),
+        ),
+        Err(e) => error::internal_error(
+            "retrieve_response_failed",
+            format!("Failed to retrieve response: {}", e),
+        ),
     }
 }
 
@@ -112,41 +100,19 @@ pub async fn cancel_response_impl(ctx: &ResponsesContext, response_id: &str) ->
                             "Response {} has status '{}' but task handle is missing. Task may have crashed or storage update failed.",
                             response_id, current_status
                         );
-                        (
-                            StatusCode::INTERNAL_SERVER_ERROR,
-                            axum::Json(json!({
-                                "error": {
-                                    "message": "Internal error: background task completed but failed to update status in storage",
-                                    "type": "internal_error",
-                                    "code": "status_update_failed"
-                                }
-                            })),
+                        error::internal_error(
+                            "status_update_failed",
+                            "Internal error: background task completed but failed to update status in storage",
                         )
-                            .into_response()
                     }
                 }
-                "completed" => (
-                    StatusCode::BAD_REQUEST,
-                    axum::Json(json!({
-                        "error": {
-                            "message": "Cannot cancel completed response",
-                            "type": "invalid_request_error",
-                            "code": "response_already_completed"
-                        }
-                    })),
-                )
-                    .into_response(),
-                "failed" => (
-                    StatusCode::BAD_REQUEST,
-                    axum::Json(json!({
-                        "error": {
-                            "message": "Cannot cancel failed response",
-                            "type": "invalid_request_error",
-                            "code": "response_already_failed"
-                        }
-                    })),
-                )
-                    .into_response(),
+                "completed" => error::bad_request(
+                    "response_already_completed",
+                    "Cannot cancel completed response",
+                ),
+                "failed" => {
+                    error::bad_request("response_already_failed", "Cannot cancel failed response")
+                }
                 "cancelled" => (
                     StatusCode::OK,
                     axum::Json(json!({
@@ -158,39 +124,20 @@ pub async fn cancel_response_impl(ctx: &ResponsesContext, response_id: &str) ->
                     .into_response(),
                 _ => {
                     // Unknown status
-                    (
-                        StatusCode::INTERNAL_SERVER_ERROR,
-                        axum::Json(json!({
-                            "error": {
-                                "message": format!("Unknown response status: {}", current_status),
-                                "type": "internal_error"
-                            }
-                        })),
+                    error::internal_error(
+                        "unknown_response_status",
+                        format!("Unknown response status: {}", current_status),
                     )
-                        .into_response()
                 }
             }
         }
-        Ok(None) => (
-            StatusCode::NOT_FOUND,
-            axum::Json(json!({
-                "error": {
-                    "message": format!("Response with id '{}' not found", response_id),
-                    "type": "not_found_error",
-                    "code": "response_not_found"
-                }
-            })),
-        )
-            .into_response(),
-        Err(e) => (
-            StatusCode::INTERNAL_SERVER_ERROR,
-            axum::Json(json!({
-                "error": {
-                    "message": format!("Failed to retrieve response: {}", e),
-                    "type": "internal_error"
-                }
-            })),
-        )
-            .into_response(),
+        Ok(None) => error::not_found(
+            "response_not_found",
+            format!("Response with id '{}' not found", response_id),
+        ),
+        Err(e) => error::internal_error(
+            "retrieve_response_failed",
+            format!("Failed to retrieve response: {}", e),
+        ),
     }
 }

sgl-model-gateway/src/routers/grpc/common/responses/utils.rs

@@ -2,11 +2,8 @@
 
 use std::sync::Arc;
 
-use axum::{
-    http::StatusCode,
-    response::{IntoResponse, Response},
-};
-use serde_json::{json, to_value};
+use axum::response::Response;
+use serde_json::to_value;
 use tracing::{debug, error, warn};
 
 use crate::{
@@ -67,24 +64,14 @@ pub fn validate_worker_availability(
     let available_models = worker_registry.get_models();
 
     if !available_models.contains(&model.to_string()) {
-        return Some(
-            (
-                StatusCode::SERVICE_UNAVAILABLE,
-                axum::Json(json!({
-                    "error": {
-                        "message": format!(
-                            "No workers available for model '{}'. Available models: {}",
-                            model,
-                            available_models.join(", ")
-                        ),
-                        "type": "service_unavailable",
-                        "param": "model",
-                        "code": "no_available_workers"
-                    }
-                })),
-            )
-                .into_response(),
-        );
+        return Some(error::service_unavailable(
+            "no_available_workers",
+            format!(
+                "No workers available for model '{}'. Available models: {}",
+                model,
+                available_models.join(", ")
+            ),
+        ));
     }
 
     None

sgl-model-gateway/src/routers/grpc/regular/responses/handlers.rs

@@ -36,7 +36,7 @@ use std::sync::Arc;
 
 use axum::{
     body::Body,
-    http::{self, StatusCode},
+    http,
     response::{IntoResponse, Response},
 };
 use bytes::Bytes;
@@ -85,18 +85,10 @@ pub async fn route_responses(
     // 1. Reject background mode (no longer supported)
     let is_background = request.background.unwrap_or(false);
     if is_background {
-        return (
-            StatusCode::BAD_REQUEST,
-            axum::Json(json!({
-                "error": {
-                    "message": "Background mode is not supported. Please set 'background' to false or omit it.",
-                    "type": "invalid_request_error",
-                    "param": "background",
-                    "code": "unsupported_parameter"
-                }
-            })),
-        )
-            .into_response();
+        return error::bad_request(
+            "unsupported_parameter",
+            "Background mode is not supported. Please set 'background' to false or omit it.",
+        );
     }
 
     // 2. Route based on execution mode
@@ -219,16 +211,10 @@ async fn route_responses_streaming(
     let chat_request = match conversions::responses_to_chat(&modified_request) {
         Ok(req) => Arc::new(req),
         Err(e) => {
-            return (
-                StatusCode::BAD_REQUEST,
-                axum::Json(json!({
-                    "error": {
-                        "message": format!("Failed to convert request: {}", e),
-                        "type": "invalid_request_error"
-                    }
-                })),
-            )
-                .into_response();
+            return error::bad_request(
+                "convert_request_failed",
+                format!("Failed to convert request: {}", e),
+            );
         }
     };