refactor: extract shared content streaming logic into helper function

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/modes/server/api/item.rs

@@ -175,50 +175,7 @@ pub async fn handle_get_item_latest_content(
 
     match item_with_meta {
         Ok(item) => {
-            let item_id = item.item.id.unwrap();
+            stream_item_content_response(&item_service, item.item.id.unwrap(), params.allow_binary, params.offset, params.length).await
-            let metadata = item.meta_as_map();
-            let mime_type = metadata
-                .get("mime_type")
-                .map(|s| s.to_string())
-                .unwrap_or_else(|| "application/octet-stream".to_string());
-            
-            // Check if content is binary when allow_binary is false
-            if !params.allow_binary {
-                let is_content_binary = if let Some(binary_val) = metadata.get("binary") {
-                    binary_val == "true"
-                } else {
-                    // For the binary check, we need to read a sample of the content
-                    match item_service.get_item_content(item_id).await {
-                        Ok(item_with_content) => {
-                            crate::common::is_binary::is_binary(&item_with_content.content)
-                        }
-                        Err(e) => {
-                            warn!("Failed to get content for binary check for item {}: {}", item_id, e);
-                            return Err(StatusCode::INTERNAL_SERVER_ERROR);
-                        }
-                    }
-                };
-                
-                if is_content_binary {
-                    return Err(StatusCode::BAD_REQUEST);
-                }
-            }
-            
-            // Now stream the content with the specified offset and length
-            match item_service.stream_item_content_by_id(item_id, true, params.offset, params.length).await {
-                Ok((stream, _)) => {
-                    let body = axum::body::Body::from_stream(stream);
-                    let response = Response::builder()
-                        .header(header::CONTENT_TYPE, mime_type)
-                        .body(body)
-                        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-                    Ok(response)
-                }
-                Err(e) => {
-                    warn!("Failed to stream content for item {}: {}", item_id, e);
-                    Err(StatusCode::INTERNAL_SERVER_ERROR)
-                }
-            }
         }
         Err(CoreError::ItemNotFoundGeneric) => Err(StatusCode::NOT_FOUND),
         Err(e) => {
@@ -264,9 +221,53 @@ pub async fn handle_get_item_content(
     }
 
     let item_service = AsyncItemService::new(state.data_dir.clone(), state.db.clone());
+    stream_item_content_response(&item_service, item_id, params.allow_binary, params.offset, params.length).await
+}
 
-    match item_service.stream_item_content_by_id(item_id, params.allow_binary, params.offset, params.length).await {
+async fn stream_item_content_response(
-        Ok((stream, mime_type)) => {
+    item_service: &AsyncItemService,
+    item_id: i64,
+    allow_binary: bool,
+    offset: u64,
+    length: u64,
+) -> Result<Response, StatusCode> {
+    // First get the item metadata to check if it's binary and get MIME type
+    let item_with_meta = item_service.get_item(item_id).await.map_err(|e| {
+        warn!("Failed to get item {} for content: {}", item_id, e);
+        StatusCode::INTERNAL_SERVER_ERROR
+    })?;
+
+    let metadata = item_with_meta.meta_as_map();
+    let mime_type = metadata
+        .get("mime_type")
+        .map(|s| s.to_string())
+        .unwrap_or_else(|| "application/octet-stream".to_string());
+    
+    // Check if content is binary when allow_binary is false
+    if !allow_binary {
+        let is_content_binary = if let Some(binary_val) = metadata.get("binary") {
+            binary_val == "true"
+        } else {
+            // For the binary check, we need to read a sample of the content
+            match item_service.get_item_content(item_id).await {
+                Ok(item_with_content) => {
+                    crate::common::is_binary::is_binary(&item_with_content.content)
+                }
+                Err(e) => {
+                    warn!("Failed to get content for binary check for item {}: {}", item_id, e);
+                    return Err(StatusCode::INTERNAL_SERVER_ERROR);
+                }
+            }
+        };
+        
+        if is_content_binary {
+            return Err(StatusCode::BAD_REQUEST);
+        }
+    }
+    
+    // Now stream the content with the specified offset and length
+    match item_service.stream_item_content_by_id(item_id, true, offset, length).await {
+        Ok((stream, _)) => {
             let body = axum::body::Body::from_stream(stream);
             let response = Response::builder()
                 .header(header::CONTENT_TYPE, mime_type)