Add name parameter

crates/pile-dataset/src/serve/extract.rs

@@ -20,6 +20,7 @@ pub struct ExtractQuery {
 
 	#[serde(default)]
 	download: bool,
+	name: Option<String>,
 }
 
 /// Extract a specific field from an item's metadata.
@@ -31,6 +32,7 @@ pub struct ExtractQuery {
 		("source" = String, Query, description = "Source label"),
 		("key" = String, Query, description = "Item key"),
 		("path" = String, Query, description = "Object path (e.g. $.flac.title); repeat for fallbacks"),
+		("name" = Option<String>, Query, description = "Downloaded filename; defaults to the last segment of the key"),
 	),
 	responses(
 		(status = 200, description = "Field value as JSON"),
@@ -112,18 +114,27 @@ pub async fn get_extract(
 		time_ms = start.elapsed().as_millis()
 	);
 
-	let disposition = if params.download {
+	let disposition_type = if params.download {
 		"attachment"
 	} else {
 		"inline"
 	};
+	let file_name = params.name.unwrap_or_else(|| {
+		params
+			.key
+			.rsplit('/')
+			.next()
+			.unwrap_or(&params.key)
+			.to_owned()
+	});
+	let disposition = format!("{disposition_type}; filename=\"{file_name}\"");
 
 	match value {
 		PileValue::String(s) => (
 			StatusCode::OK,
 			[
 				(header::CONTENT_TYPE, "text/plain".to_owned()),
-				(header::CONTENT_DISPOSITION, disposition.to_owned()),
+				(header::CONTENT_DISPOSITION, disposition),
 			],
 			s.to_string(),
 		)
@@ -132,7 +143,7 @@ pub async fn get_extract(
 			StatusCode::OK,
 			[
 				(header::CONTENT_TYPE, mime.to_string()),
-				(header::CONTENT_DISPOSITION, disposition.to_owned()),
+				(header::CONTENT_DISPOSITION, disposition),
 			],
 			bytes.as_ref().clone(),
 		)
@@ -140,7 +151,7 @@ pub async fn get_extract(
 		_ => match value.to_json(&extract_state).await {
 			Ok(json) => (
 				StatusCode::OK,
-				[(header::CONTENT_DISPOSITION, disposition.to_owned())],
+				[(header::CONTENT_DISPOSITION, disposition)],
 				Json(json),
 			)
 				.into_response(),