Delete a bunch of packages that are now on GitHub.

pkg/json_rpc_2/lib/src/exception.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 json_rpc_2.exception;
-
-import '../error_code.dart' as error_code;
-
-/// An exception from a JSON-RPC server that can be translated into an error
-/// response.
-class RpcException implements Exception {
-  /// The error code.
-  ///
-  /// All non-negative error codes are available for use by application
-  /// developers.
-  final int code;
-
-  /// The error message.
-  ///
-  /// This should be limited to a concise single sentence. Further information
-  /// should be supplied via [data].
-  final String message;
-
-  /// Extra application-defined information about the error.
-  ///
-  /// This must be a JSON-serializable object. If it's a [Map] without a
-  /// `"request"` key, a copy of the request that caused the error will
-  /// automatically be injected.
-  final data;
-
-  RpcException(this.code, this.message, {this.data});
-
-  /// An exception indicating that the method named [methodName] was not found.
-  ///
-  /// This should usually be used only by fallback handlers.
-  RpcException.methodNotFound(String methodName)
-      : this(error_code.METHOD_NOT_FOUND, 'Unknown method "$methodName".');
-
-  /// An exception indicating that the parameters for the requested method were
-  /// invalid.
-  ///
-  /// Methods can use this to reject requests with invalid parameters.
-  RpcException.invalidParams(String message)
-      : this(error_code.INVALID_PARAMS, message);
-
-  /// Converts this exception into a JSON-serializable object that's a valid
-  /// JSON-RPC 2.0 error response.
-  serialize(request) {
-    var modifiedData;
-    if (data is Map && !data.containsKey('request')) {
-      modifiedData = new Map.from(data);
-      modifiedData['request'] = request;
-    } else if (data == null) {
-      modifiedData = {'request': request};
-    } else {
-      modifiedData = data;
-    }
-
-    var id = request is Map ? request['id'] : null;
-    if (id is! String && id is! num) id = null;
-    return {
-      'jsonrpc': '2.0',
-      'error': {'code': code, 'message': message, 'data': modifiedData},
-      'id': id
-    };
-  }
-
-  String toString() {
-    var prefix = "JSON-RPC error $code";
-    var errorName = error_code.name(code);
-    if (errorName != null) prefix += " ($errorName)";
-    return "$prefix: $message";
-  }
-}