tidy up

runtime/src/server/middleware/get_server_route_handler.ts

@@ -0,0 +1,78 @@
+import { IGNORE } from '../constants';
+import { Req, Res, ServerRoute } from './types';
+
+export function get_server_route_handler(routes: ServerRoute[]) {
+	async function handle_route(route: ServerRoute, req: Req, res: Res, next: () => void) {
+		req.params = route.params(route.pattern.exec(req.path));
+
+		const method = req.method.toLowerCase();
+		// 'delete' cannot be exported from a module because it is a keyword,
+		// so check for 'del' instead
+		const method_export = method === 'delete' ? 'del' : method;
+		const handle_method = route.handlers[method_export];
+		if (handle_method) {
+			if (process.env.SAPPER_EXPORT) {
+				const { write, end, setHeader } = res;
+				const chunks: any[] = [];
+				const headers: Record<string, string> = {};
+
+				// intercept data so that it can be exported
+				res.write = function(chunk: any) {
+					chunks.push(Buffer.from(chunk));
+					write.apply(res, arguments);
+				};
+
+				res.setHeader = function(name: string, value: string) {
+					headers[name.toLowerCase()] = value;
+					setHeader.apply(res, arguments);
+				};
+
+				res.end = function(chunk?: any) {
+					if (chunk) chunks.push(Buffer.from(chunk));
+					end.apply(res, arguments);
+
+					process.send({
+						__sapper__: true,
+						event: 'file',
+						url: req.url,
+						method: req.method,
+						status: res.statusCode,
+						type: headers['content-type'],
+						body: Buffer.concat(chunks).toString()
+					});
+				};
+			}
+
+			const handle_next = (err?: Error) => {
+				if (err) {
+					res.statusCode = 500;
+					res.end(err.message);
+				} else {
+					process.nextTick(next);
+				}
+			};
+
+			try {
+				await handle_method(req, res, handle_next);
+			} catch (err) {
+				handle_next(err);
+			}
+		} else {
+			// no matching handler for method
+			process.nextTick(next);
+		}
+	}
+
+	return function find_route(req: Req, res: Res, next: () => void) {
+		if (req[IGNORE]) return next();
+
+		for (const route of routes) {
+			if (route.pattern.test(req.path)) {
+				handle_route(route, req, res, next);
+				return;
+			}
+		}
+
+		next();
+	};
+}