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| 1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 library shelf_packages_handler; |
| 6 |
| 7 import 'package:shelf/shelf.dart'; |
| 8 import 'package:shelf_static/shelf_static.dart'; |
| 9 import 'package:package_resolver/package_resolver.dart'; |
| 10 import 'package:path/path.dart' as p; |
| 11 |
| 12 import 'src/async_handler.dart'; |
| 13 import 'src/dir_handler.dart'; |
| 14 import 'src/package_config_handler.dart'; |
| 15 |
| 16 /// A handler that serves the contents of a virtual packages directory. |
| 17 /// |
| 18 /// This effectively serves `package:${request.url}`. It locates packages using |
| 19 /// the package resolution logic defined by [resolver]. If [resolver] isn't |
| 20 /// passed, it defaults to the current isolate's package resolution logic. |
| 21 /// |
| 22 /// This can only serve assets from `file:` URIs. |
| 23 Handler packagesHandler({PackageResolver resolver}) { |
| 24 resolver ??= PackageResolver.current; |
| 25 return new AsyncHandler(resolver.packageRoot.then((packageRoot) { |
| 26 if (packageRoot != null) { |
| 27 return createStaticHandler(p.fromUri(packageRoot), |
| 28 serveFilesOutsidePath: true); |
| 29 } else { |
| 30 return new PackageConfigHandler(resolver); |
| 31 } |
| 32 })); |
| 33 } |
| 34 |
| 35 /// A handler that serves virtual `packages/` directories wherever they're |
| 36 /// requested. |
| 37 /// |
| 38 /// This serves the same assets as [packagesHandler] for every URL that contains |
| 39 /// `/packages/`. Otherwise, it returns 404s for all requests. |
| 40 /// |
| 41 /// This is useful for ensuring that `package:` imports work for all entrypoints |
| 42 /// in Dartium. |
| 43 Handler packagesDirHandler({PackageResolver resolver}) => |
| 44 new DirHandler("packages", packagesHandler(resolver: resolver)); |
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