| // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library shelf_packages_handler; |
| |
| import 'package:shelf/shelf.dart'; |
| import 'package:shelf_static/shelf_static.dart'; |
| import 'package:package_resolver/package_resolver.dart'; |
| import 'package:path/path.dart' as p; |
| |
| import 'src/async_handler.dart'; |
| import 'src/dir_handler.dart'; |
| import 'src/package_config_handler.dart'; |
| |
| /// A handler that serves the contents of a virtual packages directory. |
| /// |
| /// This effectively serves `package:${request.url}`. It locates packages using |
| /// the package resolution logic defined by [resolver]. If [resolver] isn't |
| /// passed, it defaults to the current isolate's package resolution logic. |
| /// |
| /// This can only serve assets from `file:` URIs. |
| Handler packagesHandler({PackageResolver resolver}) { |
| resolver ??= PackageResolver.current; |
| return new AsyncHandler(resolver.packageRoot.then((packageRoot) { |
| if (packageRoot != null) { |
| return createStaticHandler(p.fromUri(packageRoot), |
| serveFilesOutsidePath: true); |
| } else { |
| return new PackageConfigHandler(resolver); |
| } |
| })); |
| } |
| |
| /// A handler that serves virtual `packages/` directories wherever they're |
| /// requested. |
| /// |
| /// This serves the same assets as [packagesHandler] for every URL that contains |
| /// `/packages/`. Otherwise, it returns 404s for all requests. |
| /// |
| /// This is useful for ensuring that `package:` imports work for all entrypoints |
| /// in Dartium. |
| Handler packagesDirHandler({PackageResolver resolver}) => |
| new DirHandler("packages", packagesHandler(resolver: resolver)); |