Use pub_server package

pkg/pubserver/lib/repository.dart

-// Copyright (c) 2014, 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 pubserver.repository;
-
-import 'dart:async';
-
-import 'package:pub_semver/pub_semver.dart';
-
-/// Represents information about a specific version of a pub package.
-class PackageVersion {
-  /// The name of the package.
-  final String packageName;
-
-  /// The version string of the package.
-  final String versionString;
-
-  /// The pubspec yaml file of the package
-  final String pubspecYaml;
-
-  Version _cached;
-
-  /// The version of the package as a [Version] object.
-  Version get version {
-    if (_cached != null) return _cached;
-    _cached = new Version.parse(versionString);
-    return _cached;
-  }
-
-  PackageVersion(this.packageName, this.versionString, this.pubspecYaml);
-
-  int get hashCode =>
-      packageName.hashCode ^ versionString.hashCode ^ pubspecYaml.hashCode;
-
-  bool operator==(other) {
-    return other is PackageVersion &&
-           other.packageName == packageName &&
-           other.versionString == versionString &&
-           other.pubspecYaml == pubspecYaml;
-  }
-
-  String toString() => 'PackageVersion: $packageName/$versionString';
-}
-
-
-/// Information obtained when starting an asynchronous upload.
-class AsyncUploadInfo {
-  /// The endpoint where the uploaded data should be posted.
-  ///
-  /// The upload is a POST to [uri] with the headers [fields] in the HTTP
-  /// request. The body of the POST request must be a valid tar.gz file.
-  final Uri uri;
-
-  /// The fields the uploader should add to the multipart upload.
-  final Map<String, String> fields;
-
-  AsyncUploadInfo(this.uri, this.fields);
-}
-
-/// Exception for unauthorized access attempts.
-///
-/// Uploading a new package from an unauthorized user will result in an
-/// [UnauthorizedAccess] exception.
-class UnauthorizedAccess implements Exception {
-  final String message;
-
-  UnauthorizedAccess(this.message);
-
-  String toString() => 'UnauthorizedAccess: $message';
-}
-
-/// Represents a pub repository.
-abstract class PackageRepository {
-  /// Returns the known versions of [package].
-  Stream<PackageVersion> versions(String package);
-
-  /// Whether the [version] of [package] exists.
-  Future<PackageVersion> lookupVersion(String package, String version);
-
-
-  /// Whether this package repository supports uploading packages.
-  bool get supportsUpload => false;
-
-  /// Uploads a new pub package.
-  ///
-  /// [data] must be a stream of a valid .tar.gz file.
-  Future upload(Stream<List<int>> data)
-      => new Future.error(new UnsupportedError('No upload support.'));
-
-  /// Whether this package repository supports asynchronous uploads.
-  bool get supportsAsyncUpload => false;
-
-  /// Starts a new upload.
-  ///
-  /// The given [baseRedirectUrl] instructs the uploading client to make a GET
-  /// request to this location once the upload is complete. It might contain
-  /// additional query parameters and must be supplied to `finishAsyncUpload`.
-  ///
-  /// The returned [AsyncUploadInfo] specifies where the tar.gz file should be
-  /// posted to and what headers should be supplied.
-  Future<AsyncUploadInfo> startAsyncUpload(Uri redirectUrl)
-      => new Future.error(new UnsupportedError('No async upload support.'));
-
-  /// Finishes the upload of a package.
-  Future finishAsyncUpload(Uri uri)
-      => new Future.error(new UnsupportedError('No async upload support.'));
-
-
-  /// Downloads a pub package.
-  Future<Stream> download(String package, String version);
-
-  /// Whether this package repository supports download URLs.
-  bool get supportsDownloadUrl => false;
-
-  /// A permanent download URL to a package (if supported).
-  Future<Uri> downloadUrl(String package, String version)
-      => new Future.error(new UnsupportedError('No download link support.'));
-}