Revert "Update dataprotocol client" (#500)

* Revert "Fix #494 Connection error when connecting to an Azure SQL Server with no firewall rule (#497)"

This reverts commit edd867b6fc.

* Revert "Update dataprotocol client (#418)"

This reverts commit 7808496416.

dataprotocol-node/jsonrpc/.eslintrc

@@ -0,0 +1,24 @@
+{
+    "rules": {
+        "indent": [
+            2,
+            "tab"
+        ],
+        "quotes": [
+            2,
+            "single"
+        ],
+        "linebreak-style": [
+            2,
+            "windows"
+        ],
+        "semi": [
+            2,
+            "always"
+        ]
+    },
+    "env": {
+        "node": true
+    },
+    "extends": "eslint:recommended"
+}

dataprotocol-node/jsonrpc/.npmignore

@@ -0,0 +1,9 @@
+.vscode/
+lib/test/
+lib/*.map
+src/
+test/
+.eslintrc
+.gitignore
+gulpfile.js
+tsd.json

dataprotocol-node/jsonrpc/.vscode/launch.json

@@ -0,0 +1,32 @@
+{
+	"version": "0.1.0",
+	// List of configurations. Add new configurations or edit existing ones.
+	// ONLY "node" and "mono" are supported, change "type" to switch.
+	"configurations": [
+		{
+			"request": "launch",
+			// Name of configuration; appears in the launch configuration drop down menu.
+			"name": "Mocha",
+			// Type of configuration. Possible values: "node", "mono".
+			"type": "node",
+			// Workspace relative or absolute path to the program.
+			"program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
+			// Automatically stop program after launch.
+			"stopOnEntry": false,
+			// Command line arguments passed to the program.
+			"args": ["--timeout", "999999"],
+			// Workspace relative or absolute path to the working directory of the program being debugged. Default is the current workspace.
+			"cwd": "${workspaceRoot}",
+			// Workspace relative or absolute path to the runtime executable to be used. Default is the runtime executable on the PATH.
+			"runtimeExecutable": null,
+			// Optional arguments passed to the runtime executable.
+			"runtimeArgs": [],
+			// Environment variables passed to the program.
+			"env": { },
+			// Use JavaScript source maps (if they exist).
+			"sourceMaps": true,
+			// If JavaScript source maps are enabled, the generated code is expected in this directory.
+			"outDir": "${workspaceRoot}/lib"
+		}
+	]
+}

dataprotocol-node/jsonrpc/.vscode/settings.json

@@ -0,0 +1,9 @@
+// Place your settings in this file to overwrite default and user settings.
+{
+	"javascript.validate.enable": false,
+	"files.trimTrailingWhitespace": true,
+	"eslint.enable": false,
+	"editor.insertSpaces": false,
+	"editor.tabSize": 4,
+	"typescript.tsdk": "./node_modules/typescript/lib"
+}

dataprotocol-node/jsonrpc/.vscode/tasks.json

@@ -0,0 +1,9 @@
+{
+    "version": "0.1.0",
+    "command": "npm",
+    "isShellCommand": true,
+    "args": ["run", "watch"],
+    "showOutput": "silent",
+    "isWatching": true,
+    "problemMatcher": "$tsc-watch"
+}

dataprotocol-node/jsonrpc/README.md

@@ -0,0 +1,4 @@
+# Microsoft Data Management Protocol - Node
+
+## License
+[MIT](https://github.com/Microsoft/carbon/blob/dev/license.txt)

dataprotocol-node/jsonrpc/package.json

@@ -0,0 +1,29 @@
+{
+	"name": "dataprotocol-jsonrpc",
+	"description": "A json rpc implementation over streams",
+	"version": "2.4.0",
+	"author": "Microsoft Corporation",
+	"license": "MIT",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/Microsoft/vscode-languageserver-node.git"
+	},
+	"bugs": {
+		"url": "https://github.com/Microsoft/vscode-languageserver-node/issues"
+	},
+	"engines": {
+		"node": ">=4.0.0 || >=6.0.0"
+	},
+	"main": "./lib/main.js",
+	"typings": "./lib/main",
+	"devDependencies": {
+		"mocha": "^3.0.2",
+		"typescript": "2.0.3"
+	},
+	"scripts": {
+		"prepublish": "tsc -p ./src",
+		"compile": "tsc -p ./src",
+		"watch": "tsc -w -p ./src",
+		"test": "mocha"
+	}
+}

dataprotocol-node/jsonrpc/src/cancellation.ts

@@ -0,0 +1,97 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import { Event, Emitter } from './events';
+
+export interface CancellationToken {
+	/**
+	 * Is `true` when the token has been cancelled, `false` otherwise.
+	 */
+	isCancellationRequested: boolean;
+
+	/**
+	 * An [event](#Event) which fires upon cancellation.
+	 */
+	onCancellationRequested: Event<any>;
+}
+
+export namespace CancellationToken {
+
+	export const None: CancellationToken = Object.freeze({
+		isCancellationRequested: false,
+		onCancellationRequested: Event.None
+	});
+
+	export const Cancelled: CancellationToken = Object.freeze({
+		isCancellationRequested: true,
+		onCancellationRequested: Event.None
+	});
+}
+
+const shortcutEvent: Event<any> = Object.freeze(function (callback, context?) {
+	let handle = setTimeout(callback.bind(context), 0);
+	return { dispose() { clearTimeout(handle); } };
+});
+
+class MutableToken implements CancellationToken {
+
+	private _isCancelled: boolean = false;
+	private _emitter: Emitter<any>;
+
+	public cancel() {
+		if (!this._isCancelled) {
+			this._isCancelled = true;
+			if (this._emitter) {
+				this._emitter.fire(undefined);
+				this._emitter = undefined;
+			}
+		}
+	}
+
+	get isCancellationRequested(): boolean {
+		return this._isCancelled;
+	}
+
+	get onCancellationRequested(): Event<any> {
+		if (this._isCancelled) {
+			return shortcutEvent;
+		}
+		if (!this._emitter) {
+			this._emitter = new Emitter<any>();
+		}
+		return this._emitter.event;
+	}
+}
+
+export class CancellationTokenSource {
+
+	private _token: CancellationToken;
+
+	get token(): CancellationToken {
+		if (!this._token) {
+			// be lazy and create the token only when
+			// actually needed
+			this._token = new MutableToken();
+		}
+		return this._token;
+	}
+
+	cancel(): void {
+		if (!this._token) {
+			// save an object by returning the default
+			// cancelled token when cancellation happens
+			// before someone asks for the token
+			this._token = CancellationToken.Cancelled;
+		} else {
+			(<MutableToken>this._token).cancel();
+		}
+	}
+
+	dispose(): void {
+		this.cancel();
+	}
+}

dataprotocol-node/jsonrpc/src/events.ts

@@ -0,0 +1,213 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the Source EULA. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+export interface Disposable {
+	/**
+	 * Dispose this object.
+	 */
+	dispose();
+}
+
+/**
+ * Represents a typed event.
+ */
+export interface Event<T> {
+
+	/**
+	 *
+	 * @param listener The listener function will be call when the event happens.
+	 * @param thisArgs The 'this' which will be used when calling the event listener.
+	 * @param disposables An array to which a {{IDisposable}} will be added. The
+	 * @return
+	*/
+	(listener: (e: T) => any, thisArgs?: any, disposables?: Disposable[]): Disposable;
+}
+
+export namespace Event {
+	const _disposable = { dispose() { } };
+	export const None: Event<any> = function () { return _disposable; };
+}
+
+/**
+ * Represents a type which can release resources, such
+ * as event listening or a timer.
+ */
+class DisposableImpl implements Disposable {
+
+	/**
+	 * Combine many disposable-likes into one. Use this method
+	 * when having objects with a dispose function which are not
+	 * instances of Disposable.
+	 *
+	 * @return Returns a new disposable which, upon dispose, will
+	 * dispose all provides disposable-likes.
+	 */
+	static from(...disposables: { dispose(): any }[]): DisposableImpl {
+		return new DisposableImpl(function () {
+			if (disposables) {
+				for (let disposable of disposables) {
+					disposable.dispose();
+				}
+				disposables = undefined;
+			}
+		});
+	}
+
+	private _callOnDispose: Function;
+
+	constructor(callOnDispose: Function) {
+		this._callOnDispose = callOnDispose;
+	}
+
+	/**
+	 * Dispose this object.
+	 */
+	dispose(): any {
+		if (typeof this._callOnDispose === 'function') {
+			this._callOnDispose();
+			this._callOnDispose = undefined;
+		}
+	}
+}
+
+class CallbackList {
+
+	private _callbacks: Function[];
+	private _contexts: any[];
+
+	public add(callback: Function, context: any = null, bucket?: Disposable[]): void {
+		if (!this._callbacks) {
+			this._callbacks = [];
+			this._contexts = [];
+		}
+		this._callbacks.push(callback);
+		this._contexts.push(context);
+
+		if (Array.isArray(bucket)) {
+			bucket.push({ dispose: () => this.remove(callback, context) });
+		}
+	}
+
+	public remove(callback: Function, context: any = null): void {
+		if (!this._callbacks) {
+			return;
+		}
+
+		var foundCallbackWithDifferentContext = false;
+		for (var i = 0, len = this._callbacks.length; i < len; i++) {
+			if (this._callbacks[i] === callback) {
+				if (this._contexts[i] === context) {
+					// callback & context match => remove it
+					this._callbacks.splice(i, 1);
+					this._contexts.splice(i, 1);
+					return;
+				} else {
+					foundCallbackWithDifferentContext = true;
+				}
+			}
+		}
+
+		if (foundCallbackWithDifferentContext) {
+			throw new Error('When adding a listener with a context, you should remove it with the same context');
+		}
+	}
+
+	public invoke(...args: any[]): any[] {
+		if (!this._callbacks) {
+			return;
+		}
+
+		var ret: any[] = [],
+			callbacks = this._callbacks.slice(0),
+			contexts = this._contexts.slice(0);
+
+		for (var i = 0, len = callbacks.length; i < len; i++) {
+			try {
+				ret.push(callbacks[i].apply(contexts[i], args));
+			} catch (e) {
+				console.error(e);
+			}
+		}
+		return ret;
+	}
+
+	public isEmpty(): boolean {
+		return !this._callbacks || this._callbacks.length === 0;
+	}
+
+	public dispose(): void {
+		this._callbacks = undefined;
+		this._contexts = undefined;
+	}
+}
+
+export interface EmitterOptions {
+	onFirstListenerAdd?: Function;
+	onLastListenerRemove?: Function;
+}
+
+export class Emitter<T> {
+
+	private static _noop = function () { };
+
+	private _event: Event<T>;
+	private _callbacks: CallbackList;
+
+	constructor(private _options?: EmitterOptions) {
+	}
+
+	/**
+	 * For the public to allow to subscribe
+	 * to events from this Emitter
+	 */
+	get event(): Event<T> {
+		if (!this._event) {
+			this._event = (listener: (e: T) => any, thisArgs?: any, disposables?: Disposable[]) => {
+				if (!this._callbacks) {
+					this._callbacks = new CallbackList();
+				}
+				if (this._options && this._options.onFirstListenerAdd && this._callbacks.isEmpty()) {
+					this._options.onFirstListenerAdd(this);
+				}
+				this._callbacks.add(listener, thisArgs);
+
+				let result: Disposable;
+				result = {
+					dispose: () => {
+						this._callbacks.remove(listener, thisArgs);
+						result.dispose = Emitter._noop;
+						if (this._options && this._options.onLastListenerRemove && this._callbacks.isEmpty()) {
+							this._options.onLastListenerRemove(this);
+						}
+					}
+				};
+				if (Array.isArray(disposables)) {
+					disposables.push(result);
+				}
+
+				return result;
+			};
+		}
+		return this._event;
+	}
+
+	/**
+	 * To be kept private to fire an event to
+	 * subscribers
+	 */
+	fire(event: T): any {
+		if (this._callbacks) {
+			this._callbacks.invoke.call(this._callbacks, event);
+		}
+	}
+
+	dispose() {
+		if (this._callbacks) {
+			this._callbacks.dispose();
+			this._callbacks = undefined;
+		}
+	}
+}

dataprotocol-node/jsonrpc/src/is.ts

@@ -0,0 +1,47 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the Source EULA. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+const toString = Object.prototype.toString;
+
+export function defined(value: any): boolean {
+	return typeof value !== 'undefined';
+}
+
+export function undefined(value: any): boolean {
+	return typeof value === 'undefined';
+}
+
+export function nil(value: any): boolean {
+	return value === null;
+}
+
+export function boolean(value: any): value is boolean {
+	return value === true || value === false;
+}
+
+export function string(value: any): value is string {
+	return toString.call(value) === '[object String]';
+}
+
+export function number(value: any): value is number {
+	return toString.call(value) === '[object Number]';
+}
+
+export function error(value: any): value is Error {
+	return toString.call(value) === '[object Error]';
+}
+
+export function func(value: any): value is Function {
+	return toString.call(value) === '[object Function]';
+}
+
+export function array<T>(value: any): value is T[] {
+	return Array.isArray(value);
+}
+
+export function stringArray(value: any): value is string[] {
+	return array(value) && (<any[]>value).every(elem => string(elem));
+}

dataprotocol-node/jsonrpc/src/main.ts

@@ -0,0 +1,576 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the Source EULA. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+import * as is from './is';
+
+import {
+	Message,
+	RequestMessage, RequestType, isRequestMessage,
+	ResponseMessage, isReponseMessage, ResponseError, ErrorCodes,
+	NotificationMessage, NotificationType, isNotificationMessage
+} from './messages';
+
+import { MessageReader, DataCallback, StreamMessageReader, IPCMessageReader } from './messageReader';
+import { MessageWriter, StreamMessageWriter, IPCMessageWriter } from './messageWriter';
+import { Disposable, Event, Emitter } from './events';
+import { CancellationTokenSource, CancellationToken } from './cancellation';
+
+export {
+	Message, ErrorCodes, ResponseError,
+	RequestMessage, RequestType,
+	NotificationMessage, NotificationType,
+	MessageReader, DataCallback, StreamMessageReader, IPCMessageReader,
+	MessageWriter, StreamMessageWriter, IPCMessageWriter,
+	CancellationTokenSource, CancellationToken,
+	Disposable, Event, Emitter
+}
+
+interface CancelParams {
+	/**
+	 * The request id to cancel.
+	 */
+	id: number | string;
+}
+
+namespace CancelNotification {
+	export const type: NotificationType<CancelParams> = { get method() { return '$/cancelRequest'; } };
+}
+
+export interface RequestHandler<P, R, E> {
+	(params: P, token: CancellationToken): R | ResponseError<E> | Thenable<R | ResponseError<E>>;
+}
+
+export interface NotificationHandler<P> {
+	(params: P): void;
+}
+
+export interface Logger {
+	error(message: string): void;
+	warn(message: string): void;
+	info(message: string): void;
+	log(message: string): void;
+}
+
+export enum Trace {
+	Off, Messages, Verbose
+}
+
+export type TraceValues = 'off' | 'messages' | 'verbose';
+export namespace Trace {
+	export function fromString(value: string): Trace {
+		value = value.toLowerCase();
+		switch (value) {
+			case 'off':
+				return Trace.Off;
+			case 'messages':
+				return Trace.Messages;
+			case 'verbose':
+				return Trace.Verbose;
+			default:
+				return Trace.Off;
+		}
+	}
+
+	export function toString(value: Trace): TraceValues {
+		switch (value) {
+			case Trace.Off:
+				return 'off';
+			case Trace.Messages:
+				return 'messages';
+			case Trace.Verbose:
+				return 'verbose';
+			default:
+				return 'off';
+		}
+	}
+}
+
+export interface SetTraceParams {
+	value: TraceValues;
+}
+
+export namespace SetTraceNotification {
+	export const type: NotificationType<SetTraceParams> = { get method() { return '$/setTraceNotification'; } };
+}
+
+export interface LogTraceParams {
+	message: string;
+	verbose?: string;
+}
+
+export namespace LogTraceNotification {
+	export const type: NotificationType<LogTraceParams> = { get method() { return '$/logTraceNotification'; } };
+}
+
+export interface Tracer {
+	log(message: string, data?: string): void;
+}
+
+export interface MessageConnection {
+	sendRequest<P, R, E>(type: RequestType<P, R, E>, params: P, token?: CancellationToken): Thenable<R>;
+	onRequest<P, R, E>(type: RequestType<P, R, E>, handler: RequestHandler<P, R, E>): void;
+	sendNotification<P>(type: NotificationType<P>, params?: P): void;
+	onNotification<P>(type: NotificationType<P>, handler: NotificationHandler<P>): void;
+	trace(value: Trace, tracer: Tracer, sendNotification?: boolean): void;
+	onError: Event<[Error, Message, number]>;
+	onClose: Event<void>;
+	onUnhandledNotification: Event<NotificationMessage>;
+	listen();
+	onDispose: Event<void>;
+	dispose(): void;
+}
+
+export interface ServerMessageConnection extends MessageConnection {
+}
+
+export interface ClientMessageConnection extends MessageConnection {
+}
+
+interface ResponsePromise {
+	method: string;
+	timerStart: number;
+	resolve: (response) => void;
+	reject: (error: any) => void
+}
+
+enum ConnectionState {
+	New = 1,
+	Listening = 2,
+	Closed = 3,
+	Disposed = 4
+}
+
+function createMessageConnection<T extends MessageConnection>(messageReader: MessageReader, messageWriter: MessageWriter, logger: Logger, client: boolean = false): T {
+	let sequenceNumber = 0;
+	const version: string = '2.0';
+
+	let requestHandlers: { [name: string]: RequestHandler<any, any, any> } = Object.create(null);
+	let eventHandlers: { [name: string]: NotificationHandler<any> } = Object.create(null);
+
+	let responsePromises: { [name: string]: ResponsePromise } = Object.create(null);
+	let requestTokens: { [id: string]: CancellationTokenSource } = Object.create(null);
+
+	let trace: Trace = Trace.Off;
+	let tracer: Tracer;
+
+	let state: ConnectionState = ConnectionState.New;
+	let errorEmitter: Emitter<[Error, Message, number]> = new Emitter<[Error, Message, number]>();
+	let closeEmitter: Emitter<void> = new Emitter<void>();
+	let unhandledNotificationEmitter: Emitter<NotificationMessage> = new Emitter<NotificationMessage>();
+	let disposeEmitter: Emitter<void> = new Emitter<void>();
+
+	function isListening(): boolean {
+		return state === ConnectionState.Listening;
+	}
+
+	function isClosed(): boolean {
+		return state === ConnectionState.Closed;
+	}
+
+	function isDisposed(): boolean {
+		return state === ConnectionState.Disposed;
+	}
+
+	function closeHandler(): void {
+		if (state === ConnectionState.New || state === ConnectionState.Listening) {
+			state = ConnectionState.Closed;
+			closeEmitter.fire(undefined);
+		}
+		// If the connection is disposed don't sent close events.
+	};
+
+	function readErrorHandler(error: Error): void {
+		errorEmitter.fire([error, undefined, undefined]);
+	}
+
+	function writeErrorHandler(data: [Error, Message, number]): void {
+		errorEmitter.fire(data);
+	}
+
+	messageReader.onClose(closeHandler);
+	messageReader.onError(readErrorHandler);
+
+	messageWriter.onClose(closeHandler);
+	messageWriter.onError(writeErrorHandler);
+
+	function handleRequest(requestMessage: RequestMessage) {
+		if (isDisposed()) {
+			// we return here silently since we fired an event when the
+			// connection got disposed.
+			return;
+		}
+
+		function reply(resultOrError: any | ResponseError<any>): void {
+			let message: ResponseMessage = {
+				jsonrpc: version,
+				id: requestMessage.id
+			};
+			if (resultOrError instanceof ResponseError) {
+				message.error = (<ResponseError<any>>resultOrError).toJson();
+			} else {
+				message.result = is.undefined(resultOrError) ? null : resultOrError;
+			}
+			messageWriter.write(message);
+		}
+		function replyError(error: ResponseError<any>) {
+			let message: ResponseMessage = {
+				jsonrpc: version,
+				id: requestMessage.id,
+				error: error.toJson()
+			};
+			messageWriter.write(message);
+		}
+		function replySuccess(result: any) {
+			// The JSON RPC defines that a response must either have a result or an error
+			// So we can't treat undefined as a valid response result.
+			if (is.undefined(result)) {
+				result = null;
+			}
+			let message: ResponseMessage = {
+				jsonrpc: version,
+				id: requestMessage.id,
+				result: result
+			};
+			messageWriter.write(message);
+		}
+
+		let requestHandler = requestHandlers[requestMessage.method];
+		if (requestHandler) {
+			let cancellationSource = new CancellationTokenSource();
+			let tokenKey = String(requestMessage.id);
+			requestTokens[tokenKey] = cancellationSource;
+			try {
+				let handlerResult = requestHandler(requestMessage.params, cancellationSource.token);
+				let promise = <Thenable<any | ResponseError<any>>>handlerResult;
+				if (!handlerResult) {
+					delete requestTokens[tokenKey];
+					replySuccess(handlerResult);
+				} else if (promise.then) {
+					promise.then((resultOrError): any | ResponseError<any> => {
+						delete requestTokens[tokenKey];
+						reply(resultOrError);
+					}, error => {
+						delete requestTokens[tokenKey];
+						if (error instanceof ResponseError) {
+							replyError(<ResponseError<any>>error);
+						} else if (error && is.string(error.message)) {
+							replyError(new ResponseError<void>(ErrorCodes.InternalError, `Request ${requestMessage.method} failed with message: ${error.message}`));
+						} else {
+							replyError(new ResponseError<void>(ErrorCodes.InternalError, `Request ${requestMessage.method} failed unexpectedly without providing any details.`));
+						}
+					});
+				} else {
+					delete requestTokens[tokenKey];
+					reply(handlerResult);
+				}
+			} catch (error) {
+				delete requestTokens[tokenKey];
+				if (error instanceof ResponseError) {
+					reply(<ResponseError<any>>error);
+				} else if (error && is.string(error.message)) {
+					replyError(new ResponseError<void>(ErrorCodes.InternalError, `Request ${requestMessage.method} failed with message: ${error.message}`));
+				} else {
+					replyError(new ResponseError<void>(ErrorCodes.InternalError, `Request ${requestMessage.method} failed unexpectedly without providing any details.`));
+				}
+			}
+		} else {
+			replyError(new ResponseError<void>(ErrorCodes.MethodNotFound, `Unhandled method ${requestMessage.method}`));
+		}
+	}
+
+	function handleResponse(responseMessage: ResponseMessage) {
+		if (isDisposed()) {
+			// See handle request.
+			return;
+		}
+
+		let key = String(responseMessage.id);
+		let responsePromise = responsePromises[key];
+		if (trace != Trace.Off && tracer) {
+			traceResponse(responseMessage, responsePromise);
+		}
+		if (responsePromise) {
+			delete responsePromises[key];
+			try {
+				if (is.defined(responseMessage.error)) {
+					let error = responseMessage.error;
+					responsePromise.reject(new ResponseError(error.code, error.message, error.data));
+				} else if (is.defined(responseMessage.result)) {
+					responsePromise.resolve(responseMessage.result);
+				} else {
+					throw new Error('Should never happen.');
+				}
+			} catch (error) {
+				if (error.message) {
+					logger.error(`Response handler '${responsePromise.method}' failed with message: ${error.message}`);
+				} else {
+					logger.error(`Response handler '${responsePromise.method}' failed unexpectedly.`);
+				}
+			}
+		}
+	}
+
+	function handleNotification(message: NotificationMessage) {
+		if (isDisposed()) {
+			// See handle request.
+			return;
+		}
+		let eventHandler: NotificationHandler<any>;
+		if (message.method === CancelNotification.type.method) {
+			eventHandler = (params: CancelParams) => {
+				let id = params.id;
+				let source = requestTokens[String(id)];
+				if (source) {
+					source.cancel();
+				}
+			}
+		} else {
+			eventHandler = eventHandlers[message.method];
+		}
+		if (eventHandler) {
+			try {
+				if (trace != Trace.Off && tracer) {
+					traceReceivedNotification(message);
+				}
+				eventHandler(message.params);
+			} catch (error) {
+				if (error.message) {
+					logger.error(`Notification handler '${message.method}' failed with message: ${error.message}`);
+				} else {
+					logger.error(`Notification handler '${message.method}' failed unexpectedly.`);
+				}
+			}
+		} else {
+			unhandledNotificationEmitter.fire(message);
+		}
+	}
+
+	function handleInvalidMessage(message: Message) {
+		if (!message) {
+			logger.error('Received empty message.');
+			return;
+		}
+		logger.error(`Received message which is neither a response nor a notification message:\n${JSON.stringify(message, null, 4)}`);
+		// Test whether we find an id to reject the promise
+		let responseMessage: ResponseMessage = message as ResponseMessage;
+		if (is.string(responseMessage.id) || is.number(responseMessage.id)) {
+			let key = String(responseMessage.id);
+			let responseHandler = responsePromises[key];
+			if (responseHandler) {
+				responseHandler.reject(new Error('The received response has neither a result nor an error property.'));
+			}
+		}
+	}
+
+	function traceRequest(message: RequestMessage): void {
+		let data: string = undefined;
+		if (trace === Trace.Verbose && message.params) {
+			data = `Params: ${JSON.stringify(message.params, null, 4)}\n\n`;
+		}
+		tracer.log(`Sending request '${message.method} - (${message.id})'.`, data);
+	}
+
+	function traceSendNotification(message: NotificationMessage): void {
+		let data: string = undefined;
+		if (trace === Trace.Verbose) {
+			if (message.params) {
+				data = `Params: ${JSON.stringify(message.params, null, 4)}\n\n`;
+			} else {
+				data = 'No parameters provided.\n\n';
+			}
+		}
+		tracer.log(`Sending notification '${message.method}'.`, data);
+	}
+
+	function traceReceivedNotification(message: NotificationMessage): void {
+		if (message.method === LogTraceNotification.type.method) {
+			return;
+		}
+		let data: string = undefined;
+		if (trace === Trace.Verbose) {
+			if (message.params) {
+				data = `Params: ${JSON.stringify(message.params, null, 4)}\n\n`;
+			} else {
+				data = 'No parameters provided.\n\n';
+			}
+		}
+		tracer.log(`Received notification '${message.method}'.`, data);
+	}
+
+	function traceResponse(message: ResponseMessage, responsePromise: ResponsePromise): void {
+		let data: string = undefined;
+		if (trace === Trace.Verbose) {
+			if (message.error && message.error.data) {
+				data = `Error data: ${JSON.stringify(message.error.data, null, 4)}\n\n`;
+			} else {
+				if (message.result) {
+					data = `Result: ${JSON.stringify(message.result, null, 4)}\n\n`;
+				} else if (is.undefined(message.error)) {
+					data = 'No result returned.\n\n';
+				}
+			}
+		}
+		if (responsePromise) {
+			let error = message.error ? ` Request failed: ${message.error.message} (${message.error.code}).` : '';
+			tracer.log(`Received response '${responsePromise.method} - (${message.id})' in ${Date.now() - responsePromise.timerStart}ms.${error}`, data);
+		} else {
+			tracer.log(`Received response ${message.id} without active response promise.`, data);
+		}
+	}
+
+	let callback: DataCallback = (message) => {
+		if (isRequestMessage(message)) {
+			handleRequest(message);
+		} else if (isReponseMessage(message)) {
+			handleResponse(message)
+		} else if (isNotificationMessage(message)) {
+			handleNotification(message);
+		} else {
+			handleInvalidMessage(message);
+		}
+	};
+
+	function throwIfClosedOrDisposed() {
+		if (isClosed()) {
+			throw new Error('Connection is closed.');
+		}
+		if (isDisposed()) {
+			throw new Error('Connection is disposed.');
+		}
+	}
+
+	function throwIfListening() {
+		if (isListening()) {
+			throw new Error('Connection is already listening');
+		}
+	}
+
+	let connection: MessageConnection = {
+		sendNotification: <P>(type: NotificationType<P>, params): void => {
+			throwIfClosedOrDisposed();
+
+			let notificatioMessage: NotificationMessage = {
+				jsonrpc: version,
+				method: type.method,
+				params: params
+			}
+			if (trace != Trace.Off && tracer) {
+				traceSendNotification(notificatioMessage);
+			}
+			messageWriter.write(notificatioMessage);
+		},
+		onNotification: <P>(type: NotificationType<P>, handler: NotificationHandler<P>) => {
+			throwIfClosedOrDisposed();
+
+			eventHandlers[type.method] = handler;
+		},
+		sendRequest: <P, R, E>(type: RequestType<P, R, E>, params: P, token?: CancellationToken) => {
+			throwIfClosedOrDisposed();
+
+			let id = sequenceNumber++;
+			let result = new Promise<R | ResponseError<E>>((resolve, reject) => {
+				let requestMessage: RequestMessage = {
+					jsonrpc: version,
+					id: id,
+					method: type.method,
+					params: params
+				}
+				let responsePromise: ResponsePromise = { method: type.method, timerStart: Date.now(), resolve, reject };
+				if (trace != Trace.Off && tracer) {
+					traceRequest(requestMessage);
+				}
+				try {
+					messageWriter.write(requestMessage);
+				} catch (e) {
+					// Writing the message failed. So we need to reject the promise.
+					responsePromise.reject(new ResponseError<void>(ErrorCodes.MessageWriteError, e.message ? e.message : 'Unknown reason'));
+					responsePromise = null;
+				}
+				if (responsePromise) {
+					responsePromises[String(id)] = responsePromise;
+				}
+			});
+			if (token) {
+				token.onCancellationRequested((event) => {
+					connection.sendNotification(CancelNotification.type, { id });
+				});
+			}
+			return result;
+		},
+		onRequest: <P, R, E>(type: RequestType<P, R, E>, handler: RequestHandler<P, R, E>) => {
+			throwIfClosedOrDisposed();
+
+			requestHandlers[type.method] = handler;
+		},
+		trace: (_value: Trace, _tracer: Tracer, sendNotification: boolean = false) => {
+			trace = _value;
+			if (trace === Trace.Off) {
+				tracer = null;
+			} else {
+				tracer = _tracer;
+			}
+			if (sendNotification && !isClosed() && !isDisposed()) {
+				connection.sendNotification(SetTraceNotification.type, { value: Trace.toString(_value) });
+			}
+		},
+		onError: errorEmitter.event,
+		onClose: closeEmitter.event,
+		onUnhandledNotification: unhandledNotificationEmitter.event,
+		onDispose: disposeEmitter.event,
+		dispose: () => {
+			if (isDisposed()) {
+				return;
+			}
+			state = ConnectionState.Disposed;
+			disposeEmitter.fire(undefined);
+			let error = new Error('Connection got disposed.');
+			Object.keys(responsePromises).forEach((key) => {
+				responsePromises[key].reject(error);
+			});
+			responsePromises = Object.create(null);
+			requestTokens = Object.create(null);
+		},
+		listen: () => {
+			throwIfClosedOrDisposed();
+			throwIfListening();
+
+			state = ConnectionState.Listening;
+			messageReader.listen(callback);
+		}
+	};
+
+	connection.onNotification(LogTraceNotification.type, (params) => {
+		if (trace === Trace.Off) {
+			return;
+		}
+		tracer.log(params.message, trace === Trace.Verbose ? params.verbose : undefined);
+	});
+	return connection as T;
+}
+
+function isMessageReader(value: any): value is MessageReader {
+	return is.defined(value.listen) && is.undefined(value.read);
+}
+
+function isMessageWriter(value: any): value is MessageWriter {
+	return is.defined(value.write) && is.undefined(value.end);
+}
+
+export function createServerMessageConnection(reader: MessageReader, writer: MessageWriter, logger: Logger): ServerMessageConnection;
+export function createServerMessageConnection(inputStream: NodeJS.ReadableStream, outputStream: NodeJS.WritableStream, logger: Logger): ServerMessageConnection;
+export function createServerMessageConnection(input: MessageReader | NodeJS.ReadableStream, output: MessageWriter | NodeJS.WritableStream, logger: Logger): ServerMessageConnection {
+	let reader = isMessageReader(input) ? input : new StreamMessageReader(input);
+	let writer = isMessageWriter(output) ? output : new StreamMessageWriter(output);
+	return createMessageConnection<ServerMessageConnection>(reader, writer, logger);
+}
+
+export function createClientMessageConnection(reader: MessageReader, writer: MessageWriter, logger: Logger): ClientMessageConnection;
+export function createClientMessageConnection(inputStream: NodeJS.ReadableStream, outputStream: NodeJS.WritableStream, logger: Logger): ClientMessageConnection;
+export function createClientMessageConnection(input: MessageReader | NodeJS.ReadableStream, output: MessageWriter | NodeJS.WritableStream, logger: Logger): ClientMessageConnection {
+	let reader = isMessageReader(input) ? input : new StreamMessageReader(input);
+	let writer = isMessageWriter(output) ? output : new StreamMessageWriter(output);
+	return createMessageConnection<ClientMessageConnection>(reader, writer, logger, true);
+}

dataprotocol-node/jsonrpc/src/messageReader.ts

@@ -0,0 +1,265 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the Source EULA. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+import { ChildProcess } from 'child_process';
+
+import { Message } from './messages';
+import { Event, Emitter } from './events';
+import * as is from './is';
+
+let DefaultSize: number = 8192;
+let CR: number = new Buffer('\r', 'ascii')[0];
+let LF: number = new Buffer('\n', 'ascii')[0];
+let CRLF: string = '\r\n';
+
+class MessageBuffer {
+
+	private encoding: string;
+	private index: number;
+	private buffer: Buffer;
+
+	constructor(encoding: string = 'utf-8') {
+		this.encoding = encoding;
+		this.index = 0;
+		this.buffer = new Buffer(DefaultSize);
+	}
+
+	public append(chunk: Buffer | String): void {
+		var toAppend: Buffer = <Buffer>chunk;
+		if (typeof (chunk) == 'string') {
+			var str = <string>chunk;
+			toAppend = new Buffer(str.length);
+			toAppend.write(str, 0, str.length, this.encoding);
+		}
+		if (this.buffer.length - this.index >= toAppend.length) {
+			toAppend.copy(this.buffer, this.index, 0, toAppend.length);
+		} else {
+			var newSize = (Math.ceil((this.index + toAppend.length) / DefaultSize) + 1) * DefaultSize;
+			if (this.index === 0) {
+				this.buffer = new Buffer(newSize);
+				toAppend.copy(this.buffer, 0, 0, toAppend.length);
+			} else {
+				this.buffer = Buffer.concat([this.buffer.slice(0, this.index), toAppend], newSize);
+			}
+		}
+		this.index += toAppend.length;
+	}
+
+	public tryReadHeaders(): { [key: string]: string; } {
+		let result: { [key: string]: string; } = undefined;
+		let current = 0;
+		while (current + 3 < this.index && (this.buffer[current] !== CR || this.buffer[current + 1] !== LF || this.buffer[current + 2] !== CR || this.buffer[current + 3] !== LF)) {
+			current++;
+		}
+		// No header / body separator found (e.g CRLFCRLF)
+		if (current + 3 >= this.index) {
+			return result;
+		}
+		result = Object.create(null);
+		let headers = this.buffer.toString('ascii', 0, current).split(CRLF);
+		headers.forEach((header) => {
+			let index: number = header.indexOf(':');
+			if (index === -1) {
+				throw new Error('Message header must separate key and value using :');
+			}
+			let key = header.substr(0, index);
+			let value = header.substr(index + 1).trim();
+			result[key] = value;
+		})
+
+		let nextStart = current + 4;
+		this.buffer = this.buffer.slice(nextStart);
+		this.index = this.index - nextStart;
+		return result;
+	}
+
+	public tryReadContent(length: number): string {
+		if (this.index < length) {
+			return null;
+		}
+		let result = this.buffer.toString(this.encoding, 0, length);
+		let nextStart = length;
+		this.buffer.copy(this.buffer, 0, nextStart);
+		this.index = this.index - nextStart;
+		return result;
+	}
+
+	public get numberOfBytes(): number {
+		return this.index;
+	}
+}
+
+export interface DataCallback {
+	(data: Message): void;
+}
+
+export interface PartialMessageInfo {
+	messageToken: number;
+	waitingTime: number;
+}
+
+export interface MessageReader {
+	onError: Event<Error>;
+	onClose: Event<void>;
+	onPartialMessage: Event<PartialMessageInfo>;
+	listen(callback: DataCallback): void;
+}
+
+export abstract class AbstractMessageReader {
+
+	private errorEmitter: Emitter<Error>;
+	private closeEmitter: Emitter<void>;
+
+	private partialMessageEmitter: Emitter<PartialMessageInfo>;
+
+	constructor() {
+		this.errorEmitter = new Emitter<Error>();
+		this.closeEmitter = new Emitter<void>();
+		this.partialMessageEmitter = new Emitter<PartialMessageInfo>();
+	}
+
+	public get onError(): Event<Error> {
+		return this.errorEmitter.event;
+	}
+
+	protected fireError(error: any): void {
+		this.errorEmitter.fire(this.asError(error));
+	}
+
+	public get onClose(): Event<void> {
+		return this.closeEmitter.event;
+	}
+
+	protected fireClose(): void {
+		this.closeEmitter.fire(undefined);
+	}
+
+	public get onPartialMessage(): Event<PartialMessageInfo> {
+		return this.partialMessageEmitter.event;
+	}
+
+	protected firePartialMessage(info: PartialMessageInfo): void {
+		this.partialMessageEmitter.fire(info);
+	}
+
+	private asError(error: any): Error {
+		if (error instanceof Error) {
+			return error;
+		} else {
+			return new Error(`Reader recevied error. Reason: ${is.string(error.message) ? error.message : 'unknown'}`);
+		}
+	}
+}
+
+export class StreamMessageReader extends AbstractMessageReader implements MessageReader {
+
+	private readable: NodeJS.ReadableStream;
+	private callback: DataCallback;
+	private buffer: MessageBuffer;
+	private nextMessageLength: number;
+	private messageToken: number;
+	private partialMessageTimer: NodeJS.Timer;
+	private _partialMessageTimeout: number;
+
+	public constructor(readable: NodeJS.ReadableStream, encoding: string = 'utf-8') {
+		super();
+		this.readable = readable;
+		this.buffer = new MessageBuffer(encoding);
+		this._partialMessageTimeout = 10000;
+	}
+
+	public set partialMessageTimeout(timeout: number) {
+		this._partialMessageTimeout = timeout;
+	}
+
+	public get partialMessageTimeout(): number {
+		return this._partialMessageTimeout;
+	}
+
+	public listen(callback: DataCallback): void {
+		this.nextMessageLength = -1;
+		this.messageToken = 0;
+		this.partialMessageTimer = undefined;
+		this.callback = callback;
+		this.readable.on('data', (data: Buffer) => {
+			this.onData(data);
+		});
+		this.readable.on('error', (error: any) => this.fireError(error));
+		this.readable.on('close', () => this.fireClose());
+	}
+
+	private onData(data: Buffer | String): void {
+		this.buffer.append(data);
+		while (true) {
+			if (this.nextMessageLength === -1) {
+				let headers = this.buffer.tryReadHeaders();
+				if (!headers) {
+					return;
+				}
+				let contentLength = headers['Content-Length'];
+				if (!contentLength) {
+					throw new Error('Header must provide a Content-Length property.');
+				}
+				let length = parseInt(contentLength);
+				if (isNaN(length)) {
+					throw new Error('Content-Length value must be a number.');
+				}
+				this.nextMessageLength = length;
+			}
+			var msg = this.buffer.tryReadContent(this.nextMessageLength);
+			if (msg === null) {
+				/** We haven't recevied the full message yet. */
+				this.setPartialMessageTimer();
+				return;
+			}
+			this.clearPartialMessageTimer();
+			this.nextMessageLength = -1;
+			this.messageToken++;
+			var json = JSON.parse(msg);
+			this.callback(json);
+		}
+	}
+
+	private clearPartialMessageTimer(): void {
+		if (this.partialMessageTimer) {
+			clearTimeout(this.partialMessageTimer);
+			this.partialMessageTimer = undefined;
+		}
+	}
+
+	private setPartialMessageTimer(): void {
+		this.clearPartialMessageTimer();
+		if (this._partialMessageTimeout <= 0) {
+			return;
+		}
+		this.partialMessageTimer = setTimeout((token, timeout) => {
+			this.partialMessageTimer = undefined;
+			if (token === this.messageToken) {
+				this.firePartialMessage({ messageToken: token, waitingTime: timeout });
+				this.setPartialMessageTimer();
+			}
+		}, this._partialMessageTimeout, this.messageToken, this._partialMessageTimeout);
+	}
+}
+
+export class IPCMessageReader extends AbstractMessageReader implements MessageReader {
+
+	private process: NodeJS.Process | ChildProcess;
+
+	public constructor(process: NodeJS.Process | ChildProcess) {
+		super();
+		this.process = process;
+
+		let eventEmitter: NodeJS.EventEmitter = <NodeJS.EventEmitter>this.process;
+		eventEmitter.on('error', (error: any) => this.fireError(error));
+		eventEmitter.on('close', () => this.fireClose());
+	}
+
+	public listen(callback: DataCallback): void {
+		let eventEmitter: NodeJS.EventEmitter = <NodeJS.EventEmitter>this.process;
+		eventEmitter.on('message', callback);
+	}
+}

dataprotocol-node/jsonrpc/src/messageWriter.ts

@@ -0,0 +1,118 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the Source EULA. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+import { ChildProcess } from 'child_process';
+
+import { Message } from './messages';
+import { Event, Emitter } from './events';
+import * as is from './is';
+
+let ContentLength: string = 'Content-Length: ';
+let CRLF = '\r\n';
+
+export interface MessageWriter {
+	onError: Event<[Error, Message, number]>;
+	onClose: Event<void>;
+	write(msg: Message): void;
+}
+
+export abstract class AbstractMessageWriter {
+
+	private errorEmitter: Emitter<[Error, Message, number]>;
+	private closeEmitter: Emitter<void>;
+
+	constructor() {
+		this.errorEmitter = new Emitter<[Error, Message, number]>();
+		this.closeEmitter = new Emitter<void>();
+	}
+
+	public get onError(): Event<[Error, Message, number]> {
+		return this.errorEmitter.event;
+	}
+
+	protected fireError(error: any, message?: Message, count?: number): void {
+		this.errorEmitter.fire([this.asError(error), message, count]);
+	}
+
+	public get onClose(): Event<void> {
+		return this.closeEmitter.event;
+	}
+
+	protected fireClose(): void {
+		this.closeEmitter.fire(undefined);
+	}
+
+	private asError(error: any): Error {
+		if (error instanceof Error) {
+			return error;
+		} else {
+			return new Error(`Writer recevied error. Reason: ${is.string(error.message) ? error.message : 'unknown'}`);
+		}
+	}
+}
+
+export class StreamMessageWriter extends AbstractMessageWriter implements MessageWriter {
+
+	private writable: NodeJS.WritableStream;
+	private encoding: string;
+	private errorCount: number;
+
+	public constructor(writable: NodeJS.WritableStream, encoding: string = 'utf8') {
+		super();
+		this.writable = writable;
+		this.encoding = encoding;
+		this.errorCount = 0;
+		this.writable.on('error', (error) => this.fireError(error));
+		this.writable.on('close', () => this.fireClose());
+	}
+
+	public write(msg: Message): void {
+		let json = JSON.stringify(msg);
+		let contentLength = Buffer.byteLength(json, this.encoding);
+
+		let headers: string[] = [
+			ContentLength, contentLength.toString(), CRLF,
+			CRLF
+		];
+		try {
+			// Header must be written in ASCII encoding
+			this.writable.write(headers.join(''), 'ascii');
+
+			// Now write the content. This can be written in any encoding
+			this.writable.write(json, this.encoding);
+			this.errorCount = 0;
+		} catch (error) {
+			this.errorCount++;
+			this.fireError(error, msg, this.errorCount);
+		}
+	}
+}
+
+export class IPCMessageWriter extends AbstractMessageWriter implements MessageWriter {
+
+	private process: NodeJS.Process | ChildProcess;
+	private errorCount: number;
+
+	public constructor(process: NodeJS.Process | ChildProcess) {
+		super();
+		this.process = process;
+		this.errorCount = 0;
+
+		let eventEmitter: NodeJS.EventEmitter = <NodeJS.EventEmitter>this.process;
+		eventEmitter.on('error', (error) => this.fireError(error));
+		eventEmitter.on('close', () => this.fireClose);
+	}
+
+	public write(msg: Message): void {
+		try {
+			(this.process.send as Function)(msg);
+			this.errorCount = 0;
+		} catch (error) {
+			this.errorCount++;
+			this.fireError(error, msg, this.errorCount);
+		}
+	}
+}

dataprotocol-node/jsonrpc/src/messages.ts

@@ -0,0 +1,175 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the Source EULA. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+import * as is from './is';
+
+/**
+ * A language server message
+ */
+export interface Message {
+	jsonrpc: string;
+}
+
+/**
+ * Request message
+ */
+export interface RequestMessage extends Message {
+
+	/**
+	 * The request id.
+	 */
+	id: number | string;
+
+	/**
+	 * The method to be invoked.
+	 */
+	method: string;
+
+	/**
+	 * The method's params.
+	 */
+	params?: any
+}
+
+/**
+ * Predefined error codes.
+ */
+export namespace ErrorCodes {
+	// Defined by JSON RPC
+	export const ParseError: number = -32700;
+	export const InvalidRequest: number = -32600;
+	export const MethodNotFound: number = -32601;
+	export const InvalidParams: number = -32602;
+	export const InternalError: number = -32603;
+	export const serverErrorStart: number = -32099
+	export const serverErrorEnd: number = -32000;
+
+	// Defined by VSCode.
+	export const MessageWriteError: number = 1;
+	export const MessageReadError: number = 2;
+}
+
+export interface ResponseErrorLiteral<D> {
+	/**
+	 * A number indicating the error type that occured.
+	 */
+	code: number;
+
+	/**
+	 * A string providing a short decription of the error.
+	 */
+	message: string;
+
+	/**
+	 * A Primitive or Structured value that contains additional
+	 * information about the error. Can be omitted.
+	 */
+	data?: D;
+}
+
+/**
+ * A error object return in a response in case a request
+ * has failed.
+ */
+export class ResponseError<D> extends Error {
+
+	public code: number;
+
+	public message: string;
+
+	public data: D;
+
+	constructor(code: number, message: string, data?: D) {
+		super(message);
+		this.code = code;
+		this.message = message;
+		if (is.defined(data)) {
+			this.data = data;
+		}
+	}
+
+	public toJson(): ResponseErrorLiteral<D> {
+		let result: ResponseErrorLiteral<D> = {
+			code: this.code,
+			message: this.message
+		};
+		if (is.defined(this.data)) {
+			result.data = this.data
+		};
+		return result;
+	}
+}
+
+/**
+ * A response message.
+ */
+export interface ResponseMessage extends Message {
+	/**
+	 * The request id.
+	 */
+	id: number | string;
+
+	/**
+	 * The result of a request. This can be omitted in
+	 * the case of an error.
+	 */
+	result?: any;
+
+	/**
+	 * The error object in case a request fails.
+	 */
+	error?: ResponseErrorLiteral<any>;
+}
+
+/**
+ * A interface to type the request parameter / response pair
+ */
+export interface RequestType<P, R, E> {
+	method: string;
+}
+
+/**
+ * Notification Message
+ */
+export interface NotificationMessage extends Message {
+	/**
+	 * The method to be invoked.
+	 */
+	method: string;
+
+	/**
+	 * The notification's params.
+	 */
+	params?: any
+}
+
+export interface NotificationType<P> {
+	method: string;
+}
+
+/**
+ * Tests if the given message is a request message
+ */
+export function isRequestMessage(message: Message): message is RequestMessage {
+	let candidate = <RequestMessage>message;
+	return candidate && is.string(candidate.method) && (is.string(candidate.id) || is.number(candidate.id));
+}
+
+/**
+ * Tests if the given message is a notification message
+ */
+export function isNotificationMessage(message: Message): message is NotificationMessage {
+	let candidate = <NotificationMessage>message;
+	return candidate && is.string(candidate.method) && is.undefined((<any>message).id);
+}
+
+/**
+ * Tests if the given message is a response message
+ */
+export function isReponseMessage(message: Message): message is ResponseMessage {
+	let candidate = <ResponseMessage>message;
+	return candidate && (is.defined(candidate.result) || is.defined(candidate.error)) && (is.string(candidate.id) || is.number(candidate.id));
+}

dataprotocol-node/jsonrpc/src/tsconfig.json

@@ -0,0 +1,11 @@
+{
+	"compilerOptions": {
+		"target": "ES5",
+		"module": "commonjs",
+		"moduleResolution": "node",
+		"sourceMap": true,
+		"declaration": true,
+		"stripInternal": true,
+		"outDir": "../lib"
+	}
+}

dataprotocol-node/jsonrpc/src/typings/promise.d.ts

@@ -0,0 +1,112 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+/**
+ * The Thenable (E.g. PromiseLike) and Promise declarions are taken from TypeScript's
+ * lib.core.es6.d.ts file. See above Copyright notice.
+ */
+
+/**
+ * Thenable is a common denominator between ES6 promises, Q, jquery.Deferred, WinJS.Promise,
+ * and others. This API makes no assumption about what promise libary is being used which
+ * enables reusing existing code without migrating to a specific promise implementation. Still,
+ * we recommand the use of native promises which are available in VS Code.
+ */
+interface Thenable<R> {
+    /**
+    * Attaches callbacks for the resolution and/or rejection of the Promise.
+    * @param onfulfilled The callback to execute when the Promise is resolved.
+    * @param onrejected The callback to execute when the Promise is rejected.
+    * @returns A Promise for the completion of which ever callback is executed.
+    */
+	then<TResult>(onfulfilled?: (value: R) => TResult | Thenable<TResult>, onrejected?: (reason: any) => TResult | Thenable<TResult>): Thenable<TResult>;
+	then<TResult>(onfulfilled?: (value: R) => TResult | Thenable<TResult>, onrejected?: (reason: any) => void): Thenable<TResult>;
+}
+
+/**
+ * Represents the completion of an asynchronous operation
+ */
+interface Promise<T> extends Thenable<T> {
+    /**
+    * Attaches callbacks for the resolution and/or rejection of the Promise.
+    * @param onfulfilled The callback to execute when the Promise is resolved.
+    * @param onrejected The callback to execute when the Promise is rejected.
+    * @returns A Promise for the completion of which ever callback is executed.
+    */
+	then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => TResult | Thenable<TResult>): Promise<TResult>;
+	then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => void): Promise<TResult>;
+
+    /**
+     * Attaches a callback for only the rejection of the Promise.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of the callback.
+     */
+	catch(onrejected?: (reason: any) => T | Thenable<T>): Promise<T>;
+}
+
+interface PromiseConstructor {
+    /**
+     * Creates a new Promise.
+     * @param executor A callback used to initialize the promise. This callback is passed two arguments:
+     * a resolve callback used resolve the promise with a value or the result of another promise,
+     * and a reject callback used to reject the promise with a provided reason or error.
+     */
+	new <T>(executor: (resolve: (value?: T | Thenable<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+	all<T>(values: Array<T | Thenable<T>>): Promise<T[]>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+	race<T>(values: Array<T | Thenable<T>>): Promise<T>;
+
+    /**
+     * Creates a new rejected promise for the provided reason.
+     * @param reason The reason the promise was rejected.
+     * @returns A new rejected Promise.
+     */
+	reject(reason: any): Promise<void>;
+
+    /**
+     * Creates a new rejected promise for the provided reason.
+     * @param reason The reason the promise was rejected.
+     * @returns A new rejected Promise.
+     */
+	reject<T>(reason: any): Promise<T>;
+
+    /**
+      * Creates a new resolved promise for the provided value.
+      * @param value A promise.
+      * @returns A promise whose internal state matches the provided promise.
+      */
+	resolve<T>(value: T | Thenable<T>): Promise<T>;
+
+    /**
+     * Creates a new resolved promise .
+     * @returns A resolved promise.
+     */
+	resolve(): Promise<void>;
+}
+
+declare var Promise: PromiseConstructor;

dataprotocol-node/jsonrpc/thirdpartynotices.txt

@@ -0,0 +1,31 @@
+THIRD-PARTY SOFTWARE NOTICES AND INFORMATION
+For Microsoft vscode-jsonrpc
+
+This project incorporates material from the project(s) listed below (collectively, “Third Party Code”).
+Microsoft is not the original author of the Third Party Code.  The original copyright notice and license
+under which Microsoft received such Third Party Code are set out below. This Third Party Code is licensed
+to you under their original license terms set forth below.  Microsoft reserves all other rights not expressly
+granted, whether by implication, estoppel or otherwise.
+
+1.       DefinitelyTyped version 0.0.1 (https://github.com/borisyankov/DefinitelyTyped)
+
+This project is licensed under the MIT license.
+Copyrights are respective of each contributor listed at the beginning of each definition file.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.