FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/jayson/lib/client/browser/index.d.ts

@@ -0,0 +1,14 @@
+import * as jayson from '../../..';
+
+type ClientBrowserCallServerFunctionCallback = (err?:Error | null, response?:string) => void;
+
+type ClientBrowserCallServerFunction = (request:string, callback:ClientBrowserCallServerFunctionCallback) => void;
+
+declare class ClientBrowser {
+  constructor(callServer:ClientBrowserCallServerFunction, options?:jayson.ClientOptions);
+  request(method: string, params: jayson.RequestParamsLike, id?: jayson.JSONRPCIDLike | null, callback?: jayson.JSONRPCCallbackType): jayson.JSONRPCRequest;
+  request(method: string, params: jayson.RequestParamsLike, callback?: jayson.JSONRPCCallbackType): jayson.JSONRPCRequest;
+  request(method: Array<jayson.JSONRPCRequestLike>, callback: jayson.JSONRPCCallbackTypeBatch): Array<jayson.JSONRPCRequest>;
+}
+
+export = ClientBrowser;

node_modules/jayson/lib/client/browser/index.js

@@ -0,0 +1,167 @@
+'use strict';
+
+const uuid = require('uuid').v4;
+const generateRequest = require('../../generateRequest');
+
+/**
+ * Constructor for a Jayson Browser Client that does not depend any node.js core libraries
+ * @class ClientBrowser
+ * @param {Function} callServer Method that calls the server, receives the stringified request and a regular node-style callback
+ * @param {Object} [options]
+ * @param {Function} [options.reviver] Reviver function for JSON
+ * @param {Function} [options.replacer] Replacer function for JSON
+ * @param {Number} [options.version=2] JSON-RPC version to use (1|2)
+ * @param {Function} [options.generator] Function to use for generating request IDs
+ *  @param {Boolean} [options.notificationIdNull=false] When true, version 2 requests will set id to null instead of omitting it
+ * @return {ClientBrowser}
+ */
+const ClientBrowser = function(callServer, options) {
+  if(!(this instanceof ClientBrowser)) {
+    return new ClientBrowser(callServer, options);
+  }
+
+  if (!options) {
+    options = {};
+  }
+
+  this.options = {
+    reviver: typeof options.reviver !== 'undefined' ? options.reviver : null,
+    replacer: typeof options.replacer !== 'undefined' ? options.replacer : null,
+    generator: typeof options.generator !== 'undefined' ? options.generator : function() { return uuid(); },
+    version: typeof options.version !== 'undefined' ? options.version : 2,
+    notificationIdNull: typeof options.notificationIdNull === 'boolean' ? options.notificationIdNull : false,
+  };
+
+  this.callServer = callServer;
+};
+
+module.exports = ClientBrowser;
+
+/**
+ *  Creates a request and dispatches it if given a callback.
+ *  @param {String|Array} method A batch request if passed an Array, or a method name if passed a String
+ *  @param {Array|Object} [params] Parameters for the method
+ *  @param {String|Number} [id] Optional id. If undefined an id will be generated. If null it creates a notification request
+ *  @param {Function} [callback] Request callback. If specified, executes the request rather than only returning it.
+ *  @throws {TypeError} Invalid parameters
+ *  @return {Object} JSON-RPC 1.0 or 2.0 compatible request
+ */
+ClientBrowser.prototype.request = function(method, params, id, callback) {
+  const self = this;
+  let request = null;
+
+  // is this a batch request?
+  const isBatch = Array.isArray(method) && typeof params === 'function';
+
+  if (this.options.version === 1 && isBatch) {
+    throw new TypeError('JSON-RPC 1.0 does not support batching');
+  }
+
+  // is this a raw request?
+  const isRaw = !isBatch && method && typeof method === 'object' && typeof params === 'function';
+
+  if(isBatch || isRaw) {
+    callback = params;
+    request = method;
+  } else {
+    if(typeof id === 'function') {
+      callback = id;
+      // specifically undefined because "null" is a notification request
+      id = undefined;
+    }
+
+    const hasCallback = typeof callback === 'function';
+
+    try {
+      request = generateRequest(method, params, id, {
+        generator: this.options.generator,
+        version: this.options.version,
+        notificationIdNull: this.options.notificationIdNull,
+      });
+    } catch(err) {
+      if(hasCallback) {
+        callback(err);
+        return;
+      }
+      throw err;
+    }
+
+    // no callback means we should just return a raw request
+    if(!hasCallback) {
+      return request;
+    }
+
+  }
+
+  let message;
+  try {
+    message = JSON.stringify(request, this.options.replacer);
+  } catch(err) {
+    callback(err);
+    return;
+  }
+
+  this.callServer(message, function(err, response) {
+    self._parseResponse(err, response, callback);
+  });
+
+  // always return the raw request
+  return request;
+};
+
+/**
+ * Parses a response from a server
+ * @param {Object} err Error to pass on that is unrelated to the actual response
+ * @param {String} responseText JSON-RPC 1.0 or 2.0 response
+ * @param {Function} callback Callback that will receive different arguments depending on the amount of parameters
+ * @private
+ */
+ClientBrowser.prototype._parseResponse = function(err, responseText, callback) {
+  if(err) {
+    callback(err);
+    return;
+  }
+
+  if(!responseText) {
+    // empty response text, assume that is correct because it could be a
+    // notification which jayson does not give any body for
+    callback();
+    return;
+  }
+
+  let response;
+  try {
+    response = JSON.parse(responseText, this.options.reviver);
+  } catch(err) {
+    callback(err);
+    return;
+  }
+
+  if(callback.length === 3) {
+    // if callback length is 3, we split callback arguments on error and response
+
+    // is batch response?
+    if(Array.isArray(response)) {
+
+      // necessary to split strictly on validity according to spec here
+      const isError = function(res) {
+        return typeof res.error !== 'undefined';
+      };
+
+      const isNotError = function (res) {
+        return !isError(res);
+      };
+
+      callback(null, response.filter(isError), response.filter(isNotError));
+      return;
+    } else {
+
+      // split regardless of validity
+      callback(null, response.error, response.result);
+      return;
+    }
+  
+  }
+
+  callback(null, response);
+};

node_modules/jayson/lib/client/http.js

@@ -0,0 +1,118 @@
+'use strict';
+
+const http = require('http');
+const url = require('url');
+const utils = require('../utils');
+const Client = require('../client');
+const { version } = require('../../package.json');
+
+/**
+ *  Constructor for a Jayson HTTP Client
+ *  @class ClientHttp
+ *  @constructor
+ *  @extends Client
+ *  @param {Object|String} [options] String interpreted as a URL
+ *  @param {String} [options.encoding="utf8"] Encoding to use
+ *  @return {ClientHttp}
+ */
+const ClientHttp = function(options) {
+  // accept first parameter as a url string
+  if(typeof(options) === 'string') {
+    options = url.parse(options);
+  }
+
+  if(!(this instanceof ClientHttp)) {
+    return new ClientHttp(options);
+  }
+  Client.call(this, options);
+
+  const defaults = utils.merge(this.options, {
+    encoding: 'utf8'
+  });
+
+  this.options = utils.merge(defaults, options || {});
+};
+require('util').inherits(ClientHttp, Client);
+
+module.exports = ClientHttp;
+
+ClientHttp.prototype._request = function(request, callback) {
+  const self = this;
+  // copies options so object can be modified in this context
+  const options = utils.merge({}, this.options);
+
+  utils.JSON.stringify(request, options, function(err, body) {
+    if(err) {
+      callback(err);
+      return;
+    }
+
+    options.method = options.method || 'POST';
+
+    const headers = {
+      'Content-Length': Buffer.byteLength(body, options.encoding),
+      'Content-Type': 'application/json; charset=utf-8',
+      Accept: 'application/json',
+      'User-Agent': `jayson-${version}`,
+    };
+
+    // let user override the headers
+    options.headers = utils.merge(headers, options.headers || {});
+
+    const req = self._getRequestStream(options);
+
+    self.emit('http request', req);
+
+    req.on('response', function(res) {
+      self.emit('http response', res, req);
+
+      res.setEncoding(options.encoding);
+
+      let data = '';
+      res.on('data', function(chunk) { data += chunk; });
+
+      res.on('end', function() {
+
+        // assume we have an error
+        if(res.statusCode < 200 || res.statusCode >= 300) {
+          // assume the server gave the reason in the body
+          const err = new Error(data);
+          err.code = res.statusCode;
+          callback(err);
+        } else {
+          // empty reply
+          if(!data || typeof(data) !== 'string') {
+            callback();
+            return;
+          }
+          utils.JSON.parse(data, options, callback);
+        }
+      });
+
+    });
+
+    // abort on timeout
+    req.on('timeout', function() {
+      req.abort(); // req.abort causes "error" event
+    });
+
+    // abort on error
+    req.on('error', function(err) {
+      self.emit('http error', err);
+      callback(err);
+      req.abort();
+    });
+
+    req.end(body);
+  });
+};
+
+/**
+ *  Gets a stream interface to a http server
+ *  @param {Object} options An options object
+ *  @return {require('http').ClientRequest}
+ *  @private
+ */
+ClientHttp.prototype._getRequestStream = function(options) {
+  return http.request(options || {});
+};

node_modules/jayson/lib/client/https.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const https = require('https');
+const ClientHttp = require('./http');
+
+/**
+ *  Constructor for a Jayson HTTPS Client
+ *  @class ClientHttps
+ *  @constructor
+ *  @extends ClientHttp
+ *  @param {Object|String} [options] String interpreted as a URL
+ *  @param {String} [options.encoding="utf8"] Encoding to use
+ *  @return {ClientHttps}
+ */
+const ClientHttps = function(options) {
+  if(!(this instanceof ClientHttps)) {
+    return new ClientHttps(options);
+  }
+  // just proxy to constructor for ClientHttp
+  ClientHttp.call(this, options);
+};
+require('util').inherits(ClientHttps, ClientHttp);
+
+module.exports = ClientHttps;
+
+/**
+ *  Gets a stream interface to a https server
+ *  @param {Object} options An options object
+ *  @return {require('https').ClientRequest}
+ *  @private
+ */
+ClientHttps.prototype._getRequestStream = function(options) {
+  return https.request(options || {});
+};

node_modules/jayson/lib/client/index.js

@@ -0,0 +1,221 @@
+'use strict';
+
+const events = require('events');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson Client
+ *  @class Client
+ *  @extends require('events').EventEmitter
+ *  @param {Server} [server] An instance of Server (a object with a "call" method")
+ *  @param {Object} [options]
+ *  @param {Function} [options.reviver] Reviver function for JSON
+ *  @param {Function} [options.replacer] Replacer function for JSON
+ *  @param {Number} [options.version=2] JSON-RPC version to use (1|2)
+ *  @param {Boolean} [options.notificationIdNull=false] When true, version 2 requests will set id to null instead of omitting it
+ *  @param {Function} [options.generator] Function to use for generating request IDs
+ *  @return {Client}
+ */
+const Client = function(server, options) {
+  if(arguments.length === 1 && utils.isPlainObject(server)) {
+    options = server;
+    server = null;
+  }
+
+  if(!(this instanceof Client)) {
+    return new Client(server, options);
+  }
+
+  const defaults = {
+    reviver: null,
+    replacer: null,
+    generator: utils.generateId,
+    version: 2,
+    notificationIdNull: false,
+  };
+
+  this.options = utils.merge(defaults, options || {});
+
+  if(server) {
+    this.server = server;
+  }
+};
+require('util').inherits(Client, events.EventEmitter);
+
+module.exports = Client;
+
+/**
+ * HTTP client constructor
+ * @type ClientHttp
+ * @static
+ */
+Client.http = require('./http');
+
+/**
+ * HTTPS client constructor
+ * @type ClientHttps
+ * @static
+ */
+Client.https = require('./https');
+
+/**
+ * TCP client constructor
+ * @type ClientTcp
+ * @static
+ */
+Client.tcp = require('./tcp');
+
+/**
+ * TLS client constructor
+ * @type ClientTls
+ * @static
+ */
+Client.tls = require('./tls');
+
+/**
+ * Browser client constructor
+ * @type ClientBrowser
+ * @static
+ */
+Client.browser = require('./browser');
+
+/**
+ * Websocket client constructor
+ * @type ClientWebsocket
+ * @static
+ */
+Client.websocket = require('./websocket');
+
+/**
+ *  Creates a request and dispatches it if given a callback.
+ *  @param {String|Array} method A batch request if passed an Array, or a method name if passed a String
+ *  @param {Array|Object} params Parameters for the method
+ *  @param {String|Number} [id] Optional id. If undefined an id will be generated. If null it creates a notification request
+ *  @param {Function} [callback] Request callback. If specified, executes the request rather than only returning it.
+ *  @throws {TypeError} Invalid parameters
+ *  @return {Object} JSON-RPC 1.0 or 2.0 compatible request
+ */
+Client.prototype.request = function(method, params, id, callback) {
+  const self = this;
+  let request = null;
+
+  // is this a batch request?
+  const isBatch = Array.isArray(method) && typeof(params) === 'function';
+
+  if (this.options.version === 1 && isBatch) {
+    throw new TypeError('JSON-RPC 1.0 does not support batching');
+  }
+
+  // is this a raw request?
+  const isRaw = !isBatch && method && typeof(method) === 'object' && typeof(params) === 'function';
+
+  if(isBatch || isRaw) {
+    callback = params;
+    request = method;
+  } else {
+    if(typeof(id) === 'function') {
+      callback = id;
+      // specifically undefined because "null" is a notification request
+      id = undefined;
+    }
+
+    const hasCallback = typeof(callback) === 'function';
+
+    try {
+      request = utils.request(method, params, id, {
+        generator: this.options.generator,
+        version: this.options.version,
+        notificationIdNull: this.options.notificationIdNull,
+      });
+    } catch(err) {
+      if(hasCallback) {
+        callback(err);
+        return;
+      }
+      throw err;
+    }
+
+    // no callback means we should just return a raw request before sending
+    if(!hasCallback) {
+      return request;
+    }
+
+  }
+
+  this.emit('request', request);
+
+  this._request(request, function(err, response) {
+    self.emit('response', request, response);
+    self._parseResponse(err, response, callback);
+  });
+
+  // always return the raw request
+  return request;
+};
+
+/**
+ *  Executes a request on a directly bound server
+ *  @param {Object} request A JSON-RPC 1.0 or 2.0 request
+ *  @param {Function} callback Request callback that will receive the server response as the second argument
+ *  @private
+ */
+Client.prototype._request = function(request, callback) {
+  const self = this;
+
+  // serializes the request as a JSON string so that we get a copy and can run the replacer as intended
+  utils.JSON.stringify(request, this.options, function(err, message) {
+    if(err) {
+      callback(err);
+      return;
+    }
+
+    self.server.call(message, function(error, success) {
+      const response = error || success;
+      callback(null, response);
+    });
+
+  });
+
+};
+
+/**
+ * Parses a response from a server, taking care of sugaring
+ * @param {Object} err Error to pass on that is unrelated to the actual response
+ * @param {Object} response JSON-RPC 1.0 or 2.0 response
+ * @param {Function} callback Callback that will receive different arguments depending on the amount of parameters
+ * @private
+ */
+Client.prototype._parseResponse = function(err, response, callback) {
+  if(err) {
+    callback(err);
+    return;
+  }
+
+  if(!response || typeof(response) !== 'object') {
+    callback();
+    return;
+  }
+
+  if(callback.length === 3) {
+    // if callback length is 3, we split callback arguments on error and response
+
+    // is batch response?
+    if(Array.isArray(response)) {
+
+      // necessary to split strictly on validity according to spec here
+      const isError = function(res) { return typeof(res.error) !== 'undefined'; };
+      const isNotError = function(res) { return !isError(res); };
+
+      callback(null, response.filter(isError), response.filter(isNotError));
+      return;
+    } else {
+
+      // split regardless of validity
+      callback(null, response.error, response.result);
+      return;
+    }
+  
+  }
+
+  callback(null, response);
+};

node_modules/jayson/lib/client/tcp.js

@@ -0,0 +1,92 @@
+'use strict';
+
+const net = require('net');
+const utils = require('../utils');
+const Client = require('../client');
+
+/**
+ *  Constructor for a Jayson TCP Client
+ *  @class ClientTcp
+ *  @constructor
+ *  @extends Client
+ *  @param {Object|String} [options] Object goes into options for net.connect, String goes into options.path. String option argument is NOT recommended.
+ *  @return {ClientTcp}
+ */
+const ClientTcp = function(options) {
+  if(typeof(options) === 'string') {
+    options = {path: options};
+  }
+
+  if(!(this instanceof ClientTcp)) {
+    return new ClientTcp(options);
+  }
+  Client.call(this, options);
+
+  const defaults = utils.merge(this.options, {
+    encoding: 'utf8'
+  });
+
+  this.options = utils.merge(defaults, options || {});
+};
+require('util').inherits(ClientTcp, Client);
+
+module.exports = ClientTcp;
+
+ClientTcp.prototype._request = function(request, callback) {
+  const self = this;
+
+  // copies options so object can be modified in this context
+  const options = utils.merge({}, this.options);
+  const delimiter = options.delimiter || '\n';
+
+  utils.JSON.stringify(request, options, function(err, body) {
+    if(err) {
+      callback(err);
+      return;
+    }
+
+    let handled = false;
+
+    const conn = net.connect(options, function() {
+
+      conn.setEncoding(options.encoding);
+
+      // wont get anything for notifications, just end here
+      if(utils.Request.isNotification(request)) {
+
+        handled = true;
+        conn.end(body + delimiter);
+        callback();
+
+      } else {
+
+        utils.parseStream(conn, options, function(err, response) {
+          handled = true;
+          conn.end();
+          if(err) {
+            callback(err);
+            return;
+          }
+          callback(null, response);
+        });
+
+        conn.write(body + delimiter);
+
+      }
+
+    });
+
+    self.emit('tcp socket', conn);
+
+    conn.on('error', function(err) {
+      self.emit('tcp error', err);
+      callback(err);
+    });
+
+    conn.on('end', function() {
+      if(!handled) {
+        callback();
+      }
+    });
+  });
+};

node_modules/jayson/lib/client/tls.js

@@ -0,0 +1,91 @@
+'use strict';
+
+const tls = require('tls');
+const utils = require('../utils');
+const Client = require('../client');
+
+/**
+ *  Constructor for a Jayson TLS-encrypted TCP Client
+ *  @class ClientTls
+ *  @constructor
+ *  @extends Client
+ *  @param {Object|String} [options] Object goes into options for tls.connect, String goes into options.path. String option argument is NOT recommended.
+ *  @return {ClientTls}
+ */
+const ClientTls = function(options) {
+  if(typeof(options) === 'string') {
+    options = {path: options};
+  }
+
+  if(!(this instanceof ClientTls)) {
+    return new ClientTls(options);
+  }
+  Client.call(this, options);
+
+  const defaults = utils.merge(this.options, {
+    encoding: 'utf8'
+  });
+
+  this.options = utils.merge(defaults, options || {});
+};
+require('util').inherits(ClientTls, Client);
+
+module.exports = ClientTls;
+
+ClientTls.prototype._request = function(request, callback) {
+  const self = this;
+
+  // copies options so object can be modified in this context
+  const options = utils.merge({}, this.options);
+
+  utils.JSON.stringify(request, options, function(err, body) {
+    if(err) {
+      callback(err);
+      return;
+    }
+
+    let handled = false;
+
+    const conn = tls.connect(options, function() {
+
+      conn.setEncoding(options.encoding);
+
+      // wont get anything for notifications, just end here
+      if(utils.Request.isNotification(request)) {
+
+        handled = true;
+        conn.end(body + '\n');
+        callback();
+
+      } else {
+
+        utils.parseStream(conn, options, function(err, response) {
+          handled = true;
+          conn.end();
+          if(err) {
+            callback(err);
+            return;
+          }
+          callback(null, response);
+        });
+
+        conn.write(body + '\n');
+      
+      }
+
+    });
+
+    self.emit('tcp socket', conn);
+
+    conn.on('error', function(err) {
+      self.emit('tcp error', err);
+      callback(err);
+    });
+
+    conn.on('end', function() {
+      if(!handled) {
+        callback();
+      }
+    });
+  });
+};

node_modules/jayson/lib/client/websocket.js

@@ -0,0 +1,135 @@
+'use strict';
+
+const WebSocket = require('isomorphic-ws');
+const utils = require('../utils');
+const delay = require('delay');
+const Client = require('../client');
+
+/**
+ *  Constructor for a Jayson Websocket Client
+ *  @class ClientWebsocket
+ *  @constructor
+ *  @extends Client
+ *  @param {Object} [options]
+ *  @param {String} [options.url] When options.ws not provided this will be the URL to open the websocket to
+ *  @param {ws.WebSocket} [options.ws] When not provided will create a WebSocket instance with options.url
+ *  @param {Number} [options.timeout] Will wait this long in ms until callbacking with an error
+ *  @return {ClientWebsocket}
+ */
+const ClientWebsocket = function(options) {
+  if(!(this instanceof ClientWebsocket)) {
+    return new ClientWebsocket(options);
+  }
+  Client.call(this, options);
+
+  const defaults = utils.merge(this.options, {});
+  this.options = utils.merge(defaults, options || {});
+
+  const self = this;
+  
+  this.ws = this.options.ws || new WebSocket(this.options.url);
+  this.outstandingRequests = [];
+  this.handlers = {};
+
+  this.handlers.message = function (str) {
+    utils.JSON.parse(str, self.options, function(err, response) {
+      if (err) {
+        // invalid JSON is ignored
+        return;
+      }
+
+      if (Array.isArray(response)) {
+
+        // we have a batch reply
+        const matchingRequest = self.outstandingRequests.find(function ([request]) {
+          if (Array.isArray(request)) {
+            // a batch is considered matching if at least one response id matches one request id
+            return response.some(function (resp) {
+              if (utils.Response.isValidResponse(resp)) {
+                return request.some(function (req) {
+                  return req.id === resp.id;
+                });
+              }
+              return false;
+            });
+          }
+        });
+
+        if (matchingRequest) {
+          const [ , resolve ] = matchingRequest;
+          return resolve(response);
+        }
+
+      } else if (utils.Response.isValidResponse(response)) {
+
+        const matchingRequest = self.outstandingRequests.find(function ([request]) {
+          return !Array.isArray(request) && request.id === response.id;
+        });
+
+        if (matchingRequest) {
+          const [ , resolve ] = matchingRequest;
+          return resolve(response);
+        }
+      }
+
+    });
+  };
+
+  this.ws.on('message', this.handlers.message);
+};
+require('util').inherits(ClientWebsocket, Client);
+
+module.exports = ClientWebsocket;
+
+/**
+ * @desc Removes all event listeners from Websocket instance which cancels all outstanding requests too
+ */
+ClientWebsocket.prototype.unlisten = function () {
+  for (const eventName in this.handlers) {
+    this.ws.off(eventName, this.handlers[eventName]);
+  }
+};
+
+ClientWebsocket.prototype._request = function(request, callback) {
+  const self = this;
+  const { ws, options } = this;
+
+  // we have to remove the object representing this request when the promise resolves/rejects
+  let outstandingItem;
+
+  Promise.race([
+    options.timeout > 0 ? delay(options.timeout).then(function () {
+      throw new Error('timeout reached after ' + options.timeout + ' ms');
+    }) : null,
+    new Promise(function (resolve, reject) {
+      utils.JSON.stringify(request, options, function(err, body) {
+        if (err) {
+          return resolve(err);
+        }
+
+        ws.send(body);
+
+        if (utils.Request.isNotification(request)) {
+          // notifications callback immediately since they don't have a reply
+          return resolve();
+        }
+
+        outstandingItem = [request, resolve, reject];
+        self.outstandingRequests.push(outstandingItem);
+      });
+    }),
+  ].filter(v => v !== null)).then(function (result) {
+    removeOutstandingRequest();
+    callback(null, result);
+  }).catch(function (err) {
+    removeOutstandingRequest();
+    callback(err);
+  });
+
+  function removeOutstandingRequest () {
+    if (!outstandingItem) {
+      return;
+    }
+    self.outstandingRequests = self.outstandingRequests.filter(v => v !== outstandingItem);
+  }
+};

node_modules/jayson/lib/generateRequest.js

@@ -0,0 +1,63 @@
+'use strict';
+
+const uuid = require('uuid').v4;
+
+/**
+ *  Generates a JSON-RPC 1.0 or 2.0 request
+ *  @param {String} method Name of method to call
+ *  @param {Array|Object} params Array of parameters passed to the method as specified, or an object of parameter names and corresponding value
+ *  @param {String|Number|null} [id] Request ID can be a string, number, null for explicit notification or left out for automatic generation
+ *  @param {Object} [options]
+ *  @param {Number} [options.version=2] JSON-RPC version to use (1 or 2)
+ *  @param {Boolean} [options.notificationIdNull=false] When true, version 2 requests will set id to null instead of omitting it
+ *  @param {Function} [options.generator] Passed the request, and the options object and is expected to return a request ID
+ *  @throws {TypeError} If any of the parameters are invalid
+ *  @return {Object} A JSON-RPC 1.0 or 2.0 request
+ *  @memberOf Utils
+ */
+const generateRequest = function(method, params, id, options) {
+  if(typeof method !== 'string') {
+    throw new TypeError(method + ' must be a string');
+  }
+
+  options = options || {};
+
+  // check valid version provided
+  const version = typeof options.version === 'number' ? options.version : 2;
+  if (version !== 1 && version !== 2) {
+    throw new TypeError(version + ' must be 1 or 2');
+  }
+
+  const request = {
+    method: method
+  };
+
+  if(version === 2) {
+    request.jsonrpc = '2.0';
+  }
+
+  if(params) {
+    // params given, but invalid?
+    if(typeof params !== 'object' && !Array.isArray(params)) {
+      throw new TypeError(params + ' must be an object, array or omitted');
+    }
+    request.params = params;
+  }
+
+  // if id was left out, generate one (null means explicit notification)
+  if(typeof(id) === 'undefined') {
+    const generator = typeof options.generator === 'function' ? options.generator : function() { return uuid(); };
+    request.id = generator(request, options);
+  } else if (version === 2 && id === null) {
+    // we have a version 2 notification
+    if (options.notificationIdNull) {
+      request.id = null; // id will not be set at all unless option provided
+    }
+  } else {
+    request.id = id;
+  }
+
+  return request;
+};
+
+module.exports = generateRequest;

node_modules/jayson/lib/index.js

@@ -0,0 +1,31 @@
+'use strict';
+
+/**
+ * Namespace available as require('jayson')
+ * @namespace Jayson
+ */
+const Jayson = module.exports;
+
+/**
+ * @static
+ * @type Client
+ */
+Jayson.Client = Jayson.client = require('./client');
+
+/**
+ * @static
+ * @type Server
+ */
+Jayson.Server = Jayson.server = require('./server');
+
+/**
+ * @static
+ * @type Utils
+ */
+Jayson.Utils = Jayson.utils = require('./utils');
+
+/**
+ * @static
+ * @type Method
+ */
+Jayson.Method = Jayson.method = require('./method');

node_modules/jayson/lib/method.js

@@ -0,0 +1,120 @@
+'use strict';
+
+const utils = require('./utils');
+
+/**
+ * @summary Constructor for a Jayson Method
+ * @class Method
+ * @param {Function} [handler] Function to set as handler
+ * @param {Object} [options] 
+ * @param {Function} [options.handler] Same as separate handler
+ * @param {Boolean} [options.useContext=false] When true, the handler expects a context object
+ * @param {Array|Object} [options.params] Defines params that the handler accepts
+ */
+const Method = function(handler, options) {
+
+  if(!(this instanceof Method)) {
+    return new Method(handler, options);
+  }
+
+  // only got passed options
+  if(utils.isPlainObject(handler)) {
+    options = handler;
+    handler = null;
+  }
+
+  const defaults = {
+    useContext: false,
+  };
+
+  options = options || {};
+
+  this.options = utils.merge(defaults, options);
+  this.handler = handler || options.handler;
+};
+
+module.exports = Method;
+
+/**
+ * @summary Returns the handler function associated with this method
+ * @return {Function}
+ */
+Method.prototype.getHandler = function() {
+  return this.handler;
+};
+
+/**
+ * @summary Sets the handler function associated with this method
+ * @param {Function} handler
+ */
+Method.prototype.setHandler = function(handler) {
+  this.handler = handler;
+};
+
+/**
+ * @summary Prepare parameters for the method handler
+ * @private
+ */
+Method.prototype._getHandlerParams = function(params) {
+  const options = this.options;
+
+  const isObjectParams = !Array.isArray(params) && utils.isPlainObject(params) && params;
+  const isArrayParams = Array.isArray(params);
+
+  switch(true) {
+
+      // handler always gets an array
+    case options.params === Array:
+      return isArrayParams ? params : utils.toArray(params);
+
+      // handler always gets an object
+    case options.params === Object:
+      return isObjectParams ? params : utils.toPlainObject(params);
+
+      // handler gets a list of defined properties that should always be set
+    case Array.isArray(options.params): {
+      const undefinedParams = Object.keys(options.params).reduce(function (out, index) {
+        const key = options.params[index];
+        out[key] = undefined;
+        return out;
+      }, {});
+      return {...undefinedParams, ...utils.pick(params, Object.keys(params))};
+    }
+
+      // handler gets a map of defined properties and their default values
+    case utils.isPlainObject(options.params):
+      return {...options.params, ...utils.pick(params, Object.keys(params))};
+
+      // give params as is
+    default:
+      return params;
+
+  }
+
+};
+
+/**
+ * @summary Executes this method in the context of a server
+ * @param {Server} server
+ * @param {Array|Object} requestParams
+ * @param {Object} [context]
+ * @param {Function} callback
+ */
+Method.prototype.execute = function(server, requestParams, context, callback) {
+  if(typeof(context) === 'function') {
+    callback = context;
+    context = {};
+  }
+
+  if(!context) {
+    context = {};
+  }
+
+  // when useContext is true, the handler gets a context object every time
+  const useContext = Boolean(this.options.useContext);
+  const handler = this.getHandler();
+  const params = this._getHandlerParams(requestParams);
+
+  const args = useContext ? [params, context, callback] : [params, callback];
+  return handler.call(server, ...args);
+};

node_modules/jayson/lib/server/http.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const http = require('http');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson HTTP server
+ *  @class ServerHttp
+ *  @extends require('http').Server
+ *  @param {Server} server Server instance
+ *  @param {Object} [options] Options for this instance
+ *  @return {ServerHttp}
+ */
+const ServerHttp = function(server, options) {
+  if(!(this instanceof ServerHttp)) {
+    return new ServerHttp(server, options);
+  }
+
+  this.options = utils.merge(server.options, options || {});
+
+  const listener = utils.getHttpListener(this, server);
+  http.Server.call(this, listener);
+};
+require('util').inherits(ServerHttp, http.Server);
+
+module.exports = ServerHttp;

node_modules/jayson/lib/server/https.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const https = require('https');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson HTTPS server
+ *  @class ServerHttps
+ *  @extends require('https').Server
+ *  @param {Server} server Server instance
+ *  @param {Object} [options] Options for this instance
+ *  @return {ServerHttps}
+ */
+const ServerHttps = function(server, options) {
+  if(!(this instanceof ServerHttps)) {
+    return new ServerHttps(server, options);
+  }
+
+  this.options = utils.merge(server.options, options || {});
+
+  const listener = utils.getHttpListener(this, server);
+  https.Server.call(this, this.options, listener);
+};
+require('util').inherits(ServerHttps, https.Server);
+
+module.exports = ServerHttps;

node_modules/jayson/lib/server/index.js

@@ -0,0 +1,476 @@
+'use strict';
+
+const events = require('events');
+const jayson = require('../');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson Server
+ *  @class Server
+ *  @extends require('events').EventEmitter
+ *  @param {Object<String,Function>} [methods] Methods to add
+ *  @param {Object} [options]
+ *  @param {Array|Object} [options.params] Passed to Jayson.Method as an option when created
+ *  @param {Boolean} [options.useContext=false] Passed to Jayson.Method as an option when created
+ *  @param {Function} [options.reviver] Reviver function for JSON
+ *  @param {Function} [options.replacer] Replacer function for JSON
+ *  @param {Function} [options.methodConstructor] Methods will be made instances of this class
+ *  @param {String} [options.encoding="utf8"] Encoding to use
+ *  @param {Number} [options.version=2] JSON-RPC version to use (1|2)
+ *  @param {Number} [options.maxBatchLength=Infinity] Maximum requests allowed in a batch
+ *  @param {Function} [options.router] Function to use for routing methods
+ *  @property {Object} options A reference to the internal options object that can be modified directly
+ *  @property {Object} errorMessages Map of error code to error message pairs that will be used in server responses
+ *  @property {ServerHttp} http HTTP interface constructor
+ *  @property {ServerHttps} https HTTPS interface constructor
+ *  @property {ServerTcp} tcp TCP interface constructor
+ *  @property {ServerTls} tls TLS interface constructor
+ *  @property {Middleware} middleware Middleware generator function
+ *  @return {Server}
+ */
+const Server = function(methods, options) {
+  if(!(this instanceof Server)) {
+    return new Server(methods, options);
+  }
+
+  const defaults = {
+    reviver: null,
+    replacer: null,
+    encoding: 'utf8',
+    version: 2,
+    useContext: false,
+    methodConstructor: jayson.Method,
+    maxBatchLength: Infinity,
+    router: function(method) {
+      return this.getMethod(method);
+    }
+  };
+
+  this.options = utils.merge(defaults, options || {});
+
+  // bind router to the server
+  this.options.router = this.options.router.bind(this);
+  
+  this._methods = {};
+
+  // adds methods passed to constructor
+  this.methods(methods || {});
+
+  // assigns interfaces to this instance
+  const interfaces = Server.interfaces;
+  for(let name in interfaces) {
+    this[name] = interfaces[name].bind(interfaces[name], this);
+  }
+
+  // copies error messages for defined codes into this instance
+  this.errorMessages = {};
+  for(let handle in Server.errors) {
+    const code = Server.errors[handle];
+    this.errorMessages[code] = Server.errorMessages[code];
+  }
+
+};
+require('util').inherits(Server, events.EventEmitter);
+
+module.exports = Server;
+
+/**
+ * Interfaces that will be automatically bound as properties of a Server instance
+ * @enum {Function}
+ * @static
+ */
+Server.interfaces = {
+  http: require('./http'),
+  https: require('./https'),
+  tcp: require('./tcp'),
+  tls: require('./tls'),
+  websocket: require('./websocket'),
+  middleware: require('./middleware')
+};
+
+/**
+ * JSON-RPC specification errors that map to an integer code
+ * @enum {Number}
+ * @static
+ */
+Server.errors = {
+  PARSE_ERROR: -32700,
+  INVALID_REQUEST: -32600,
+  METHOD_NOT_FOUND: -32601,
+  INVALID_PARAMS: -32602,
+  INTERNAL_ERROR: -32603,
+  INVALID_REQUEST_MAX_BATCH_LENGTH_EXCEEDED: -32099,
+};
+
+/*
+ * Error codes that map to an error message
+ * @enum {String}
+ * @static
+ */
+Server.errorMessages = {};
+Server.errorMessages[Server.errors.PARSE_ERROR] = 'Parse Error';
+Server.errorMessages[Server.errors.INVALID_REQUEST] = 'Invalid request';
+Server.errorMessages[Server.errors.METHOD_NOT_FOUND] = 'Method not found';
+Server.errorMessages[Server.errors.INVALID_PARAMS] = 'Invalid method parameter(s)';
+Server.errorMessages[Server.errors.INTERNAL_ERROR] = 'Internal error';
+Server.errorMessages[Server.errors.INVALID_REQUEST_MAX_BATCH_LENGTH_EXCEEDED] = 'Invalid request: Maximum batch length exceeded';
+
+/**
+ *  Adds a single method to the server
+ *  @param {String} name Name of method to add
+ *  @param {Function|Client} definition Function or Client for a relayed method
+ *  @throws {TypeError} Invalid parameters
+ */
+Server.prototype.method = function(name, definition) {
+  const Method = this.options.methodConstructor;
+
+  const isRelay = definition instanceof jayson.Client;
+  const isMethod = definition instanceof Method;
+  const isDefinitionFunction = typeof definition === 'function';
+
+  // a valid method is either a function or a client (relayed method)
+  if(!isRelay && !isMethod && !isDefinitionFunction) {
+    throw new TypeError('method definition must be either a function, an instance of jayson.Client or an instance of jayson.Method');
+  }
+
+  if(!name || typeof(name) !== 'string') {
+    throw new TypeError('"' + name + '" must be a non-zero length string');
+  }
+
+  if(/^rpc\./.test(name)) {
+    throw new TypeError('"' + name + '" is a reserved method name');
+  }
+
+  // make instance of jayson.Method
+  if(!isRelay && !isMethod) {
+    definition = new Method(definition, {
+      params: this.options.params,
+      useContext: this.options.useContext
+    });
+  }
+
+  this._methods[name] = definition;
+};
+
+/**
+ *  Adds a batch of methods to the server
+ *  @param {Object} methods Methods to add
+ */
+Server.prototype.methods = function(methods) {
+  methods = methods || {};
+
+  for(let name in methods) {
+    this.method(name, methods[name]);
+  }
+
+};
+
+/**
+ *  Checks if a method is registered with the server
+ *  @param {String} name Name of method
+ *  @return {Boolean}
+ */
+Server.prototype.hasMethod = function(name) {
+  return name in this._methods;
+};
+
+/**
+ *  Removes a method from the server
+ *  @param {String} name
+ */
+Server.prototype.removeMethod = function(name) {
+  if(this.hasMethod(name)) {
+    delete this._methods[name];
+  }
+};
+
+/**
+ * Gets a method from the server
+ * @param {String} name
+ * @return {Method}
+ */
+Server.prototype.getMethod = function(name) {
+  if (Object.prototype.hasOwnProperty.call(this._methods, name)) {
+    return this._methods[name];
+  }
+};
+
+/**
+ *  Returns a JSON-RPC compatible error property
+ *  @param {Number} [code=-32603] Error code
+ *  @param {String} [message="Internal error"] Error message
+ *  @param {Object} [data] Additional data that should be provided
+ *  @return {Object}
+ */
+Server.prototype.error = function(code, message, data) {
+  if(typeof(code) !== 'number') {
+    code = Server.errors.INTERNAL_ERROR;
+  }
+
+  if(typeof(message) !== 'string') {
+    message = this.errorMessages[code] || '';
+  }
+
+  const error = { code: code, message: message };
+  if(typeof(data) !== 'undefined') {
+    error.data = data;
+  }
+  return error;
+};
+
+/**
+ *  Calls a method on the server
+ *  @param {Object|Array|String} request A JSON-RPC request object. Object for single request, Array for batches and String for automatic parsing (using the reviver option)
+ *  @param {Object} [context] Optional context object passed to methods
+ *  @param {Function} [originalCallback] Callback that receives one of two arguments: first is an error and the second a response
+ */
+Server.prototype.call = function(request, context, originalCallback) {
+  const self = this;
+
+  if(typeof(context) === 'function') {
+    originalCallback = context;
+    context = {};
+  }
+
+  if(typeof(context) === 'undefined') {
+    context = {};
+  }
+
+  if(typeof(originalCallback) !== 'function') {
+    originalCallback = function() {};
+  }
+
+  // compose the callback so that we may emit an event on every response
+  const callback = function(error, response) {
+    self.emit('response', request, response || error);
+    originalCallback.apply(null, arguments);
+  };
+
+  maybeParse(request, this.options, function(err, request) {
+    let error = null; // JSON-RPC error
+
+    if(err) {
+      error = self.error(Server.errors.PARSE_ERROR, null, err);
+      callback(utils.response(error, undefined, undefined, self.options.version));
+      return;
+    }
+
+    // is this a batch request?
+    if(utils.Request.isBatch(request)) {
+
+      // batch requests not allowed for version 1
+      if(self.options.version === 1) {
+        error = self.error(Server.errors.INVALID_REQUEST);
+        callback(utils.response(error, undefined, undefined, self.options.version));
+        return;
+      }
+
+      // special case if empty batch request
+      if(!request.length) {
+        error = self.error(Server.errors.INVALID_REQUEST);
+        callback(utils.response(error, undefined, undefined, self.options.version));
+        return;
+      }
+
+      // verify number of batch requests does not exceed maximum allowed length
+      if (self.options.maxBatchLength >= 0 && request.length > self.options.maxBatchLength) {
+        error = self.error(Server.errors.INVALID_REQUEST_MAX_BATCH_LENGTH_EXCEEDED);
+        callback(utils.response(error, undefined, undefined, self.options.version));
+        return;
+      }
+
+      self._batch(request, context, callback);
+      return;
+    }
+
+    self.emit('request', request);
+
+    // is the request valid?
+    if(!utils.Request.isValidRequest(request, self.options.version)) {
+      error = self.error(Server.errors.INVALID_REQUEST);
+      callback(utils.response(error, undefined, undefined, self.options.version));
+      return;
+    }
+
+    // from now on we are "notification-aware" and can deliberately ignore errors for such requests
+    const respond = function(error, result) {
+      if(utils.Request.isNotification(request)) {
+        callback();
+        return;
+      }
+      const response = utils.response(error, result, request.id, self.options.version);
+      if(response.error) {
+        callback(response);
+      } else {
+        callback(null, response);
+      }
+    };
+
+    const method = self._resolveRouter(request.method, request.params);
+
+    // are we attempting to invoke a relayed method?
+    if(method instanceof jayson.Client) {
+      return method.request(request.method, request.params, request.id, function(error, response) {
+        if(utils.Request.isNotification(request)) {
+          callback();
+          return;
+        }
+        callback(error, response);
+      });
+    }
+    
+    // does the method exist?
+    if(!(method instanceof jayson.Method)) {
+      respond(self.error(Server.errors.METHOD_NOT_FOUND));
+      return;
+    }
+
+    // execute jayson.Method instance
+    method.execute(self, request.params, context, function(error, result) {
+    
+      if(utils.Response.isValidError(error, self.options.version)) {
+        respond(error);
+        return;
+      }
+
+      // got an invalid error
+      if(error) {
+        respond(self.error(Server.errors.INTERNAL_ERROR));
+        return;
+      }
+
+      respond(null, result);
+    
+    });
+
+  });
+};
+
+/**
+ *  Calls a method on the server returning a promise
+ *  @param {Object|Array|String} request A JSON-RPC request object. Object for single request, Array for batches and String for automatic parsing (using the reviver option)
+ *  @param {Object} [context] Optional context object passed to methods
+ *  @return {Promise<Object>}
+ */
+Server.prototype.callp = function (...args) {
+  const self = this;
+  return new Promise(function (resolve, reject) {
+    return self.call(...args, function (err, response) {
+      if (err) {
+        reject(err);
+        return;
+      }
+      resolve(response);
+    });
+  });
+};
+
+/**
+ * Invoke the router
+ * @param {String} method Method to resolve
+ * @param {Array|Object} params Request params
+ * @return {Method}
+ */
+Server.prototype._resolveRouter = function(method, params) {
+
+  let router = this.options.router;
+
+  if(typeof router !== 'function') {
+    router = function(method) {
+      return this.getMethod(method);
+    };
+  }
+
+  const resolved = router.call(this, method, params);
+
+  // got a jayson.Method or a jayson.Client, return it
+  if((resolved instanceof jayson.Method) || (resolved instanceof jayson.Client)) {
+    return resolved;
+  }
+
+  // got a regular function, make it an instance of jayson.Method
+  if(typeof resolved === 'function') {
+    return new jayson.Method(resolved);
+  }
+
+};
+
+/**
+ *  Evaluates a batch request
+ *  @private
+ */
+Server.prototype._batch = function(requests, context, callback) {
+  const self = this;
+  
+  const responses = [];
+
+  this.emit('batch', requests);
+
+  /**
+   * @ignore
+   */
+  const maybeRespond = function() {
+
+    // done when we have filled up all the responses with a truthy value
+    const isDone = responses.every(function(response) { return response !== null; });
+    if(isDone) {
+
+      // filters away notifications
+      const filtered = responses.filter(function(res) {
+        return res !== true;
+      });
+
+      // only notifications in request means empty response
+      if(!filtered.length) {
+        callback();
+        return;
+      }
+      callback(null, filtered);
+    }
+  };
+
+  /**
+   * @ignore
+   */
+  const wrapper = function(request, index) {
+    responses[index] = null;
+    return function() {
+      if(utils.Request.isValidRequest(request, self.options.version)) {
+        self.call(request, context, function(error, response) {
+          responses[index] = error || response || true;
+          maybeRespond();
+        });
+      } else {
+        const error = self.error(Server.errors.INVALID_REQUEST);
+        responses[index] = utils.response(error, undefined, undefined, self.options.version);
+        maybeRespond();
+      }
+    };
+  };
+
+  const stack = requests.map(function(request, index) {
+    // ignore possibly nested requests
+    if(utils.Request.isBatch(request)) {
+      return null;
+    }
+    return wrapper(request, index);
+  });
+
+  stack.forEach(function(method) {
+    if(typeof(method) === 'function') {
+      method();
+    }
+  });
+};
+
+/**
+ * Parse "request" if it is a string, else just invoke callback
+ * @ignore
+ */
+function maybeParse(request, options, callback) {
+  if(typeof(request) === 'string') {
+    utils.JSON.parse(request, options, callback);
+  } else {
+    callback(null, request);
+  }
+}

node_modules/jayson/lib/server/middleware.js

@@ -0,0 +1,75 @@
+'use strict';
+
+const utils = require('../utils');
+
+/**
+ * Creates a Connect/Express compatible middleware bound to a Server
+ * @class ServerMiddleware
+ * @param {Server} server Server instance
+ * @param {Object} [outerOptions] Specific options for the middleware
+ * @return {Function}
+ */
+const Middleware = function(server, outerOptions) {
+  return function(req, res, next) {
+    const options = utils.merge(server.options, outerOptions || {});
+
+    // default options.end to true
+    if(typeof(options.end) !== 'boolean') {
+      options.end = true;
+    }
+
+    //  405 method not allowed if not POST
+    if(!utils.isMethod(req, 'POST')) {
+      return error(405, { 'Allow': 'POST' });
+    }
+
+    // 415 unsupported media type if Content-Type is not correct
+    if(!utils.isContentType(req, 'application/json')) {
+      return error(415);
+    }
+
+    // body does not appear to be parsed, 500 server error
+    if(!req.body || typeof(req.body) !== 'object') {
+      return next(new Error('Request body must be parsed'));
+    }
+
+    server.call(req.body, function(error, success) {
+      const response = error || success;
+
+      utils.JSON.stringify(response, options, function(err, body) {
+        if(err) {
+          return next(err);
+        }
+
+        // empty response?
+        if(body) {
+          const headers = {
+            'content-length': Buffer.byteLength(body, options.encoding),
+            'content-type': 'application/json; charset=utf-8'
+          };
+
+          res.writeHead(200, headers);
+          res.write(body);
+        } else {
+          res.writeHead(204);
+        }
+
+        // if end is false, next request instead of ending it
+        if(options.end) {
+          res.end();
+        } else {
+          next();
+        }
+
+      });
+    });
+
+    // ends the request with an error code
+    function error(code, headers) {
+      res.writeHead(code, headers || {});
+      res.end();
+    }
+  };
+};
+
+module.exports = Middleware;

node_modules/jayson/lib/server/tcp.js

@@ -0,0 +1,72 @@
+'use strict';
+
+const net = require('net');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson TCP server
+ *  @class ServerTcp
+ *  @extends require('net').Server
+ *  @param {Server} server Server instance
+ *  @param {Object} [options] Options for this instance
+ *  @return {ServerTcp}
+ */
+const ServerTcp = function(server, options) {
+  if(!(this instanceof ServerTcp)) {
+    return new ServerTcp(server, options);
+  }
+
+  this.options = utils.merge(server.options, options || {});
+
+  net.Server.call(this, getTcpListener(this, server));
+};
+require('util').inherits(ServerTcp, net.Server);
+
+module.exports = ServerTcp;
+
+/**
+ *  Returns a TCP connection listener bound to the server in the argument.
+ *  @param {Server} server Instance of JaysonServer
+ *  @param {net.Server} self Instance of net.Server
+ *  @return {Function}
+ *  @private
+ *  @ignore
+ */
+function getTcpListener(self, server) {
+  return function(conn) {
+    const options = self.options || {};
+
+    utils.parseStream(conn, options, function(err, request) {
+      if(err) {
+        return respondError(err);
+      }
+
+      server.call(request, function(error, success) {
+        const response = error || success;
+        if(response) {
+          utils.JSON.stringify(response, options, function(err, body) {
+            if(err) {
+              return respondError(err);
+            }
+            conn.write(body);
+          });
+        } else {
+          // no response received at all, must be a notification
+        }
+      });
+    });
+
+    // ends the request with an error code
+    function respondError(err) {
+      const error = server.error(-32700, null, String(err));
+      const response = utils.response(error, undefined, undefined, self.options.version);
+      utils.JSON.stringify(response, options, function(err, body) {
+        if(err) {
+          body = ''; // we tried our best.
+        }
+        conn.end(body);
+      });
+    }
+
+  };
+}

node_modules/jayson/lib/server/tls.js

@@ -0,0 +1,72 @@
+'use strict';
+
+const tls = require('tls');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson TLS-encrypted TCP server
+ *  @class ServerTls
+ *  @extends require('tls').Server
+ *  @param {Server} server Server instance
+ *  @param {Object} [options] Options for this instance
+ *  @return {ServerTls}
+ */
+const ServerTls = function(server, options) {
+  if(!(this instanceof ServerTls)) {
+    return new ServerTls(server, options);
+  }
+
+  this.options = utils.merge(server.options, options || {});
+
+  tls.Server.call(this, this.options, getTlsListener(this, server));
+};
+require('util').inherits(ServerTls, tls.Server);
+
+module.exports = ServerTls;
+
+/**
+ *  Returns a TLS-encrypted TCP connection listener bound to the server in the argument.
+ *  @param {Server} server Instance of JaysonServer
+ *  @param {tls.Server} self Instance of tls.Server
+ *  @return {Function}
+ *  @private
+ *  @ignore
+ */
+function getTlsListener(self, server) {
+  return function(conn) {
+    const options = self.options || {};
+
+    utils.parseStream(conn, options, function(err, request) {
+      if(err) {
+        return respondError(err);
+      }
+
+      server.call(request, function(error, success) {
+        const response = error || success;
+        if(response) {
+          utils.JSON.stringify(response, options, function(err, body) {
+            if(err) {
+              return respondError(err);
+            }
+            conn.write(body);
+          });
+        } else {
+          // no response received at all, must be a notification
+        }
+      });
+    });
+
+    // ends the request with an error code
+    function respondError(err) {
+      const error = server.error(-32700, null, String(err));
+      const response = utils.response(error, undefined, undefined, self.options.version);
+      utils.JSON.stringify(response, options, function(err, body) {
+        if(err) {
+          body = ''; // we tried our best.
+        }
+        conn.end(body);
+      });
+    }
+
+  };
+}

node_modules/jayson/lib/server/websocket.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const WebSocket = require('isomorphic-ws');
+const utils = require('../utils');
+
+/**
+ *  Constructor for a Jayson Websocket Server
+ *  @name ServerWebsocket
+ *  @param {Server} server Server instance
+ *  @param {Object} [options] Options for this instance
+ *  @param {ws.Websocket.Server} [options.wss] When provided will not create a new ws.WebSocket.Server but use this one
+ *  @return {ws.WebSocket.Server}
+ */
+const ServerWebsocket = function(server, options) {
+  const jaysonOptions = utils.merge(server.options, options || {});
+  const wss = options.wss || new WebSocket.Server(options);
+
+  wss.on('connection', onConnection);
+
+  function onConnection (ws) {
+    // every message received on the socket is handled as a JSON-RPC message
+    ws.on('message', function (buf) {
+      const str = Buffer.isBuffer(buf) ? buf.toString('utf8') : buf;
+      utils.JSON.parse(str, jaysonOptions, function(err, request) {
+        if (err) {
+          return respondError(err);
+        }
+
+        server.call(request, function(error, success) {
+          const response = error || success;
+          if (response) {
+            utils.JSON.stringify(response, jaysonOptions, function (err, str) {
+              if (err) {
+                return respondError(err);
+              }
+              ws.send(str);
+            });
+          } else {
+            // no response received at all, must be a notification which we do nothing about
+          }
+        });
+      });
+    });
+
+    // writes an error message to the client
+    function respondError (err) {
+      const error = server.error(-32700, null, String(err));
+      const response = utils.response(error, undefined, undefined, jaysonOptions.version);
+      utils.JSON.stringify(response, jaysonOptions, function(err, str) {
+        if(err) {
+          // not much to do here, we couldn't even respond with an error
+          throw err;
+        }
+        ws.send(str);
+      });
+    }
+  }
+
+  return wss;
+};
+
+module.exports = ServerWebsocket;

node_modules/jayson/lib/utils.js

@@ -0,0 +1,517 @@
+'use strict';
+
+const StreamValues = require('stream-json/streamers/StreamValues');
+const Verifier = require('stream-json/utils/Verifier');
+const JSONstringify = require('json-stringify-safe');
+const uuid = require('uuid').v4;
+
+const generateRequest = require('./generateRequest');
+
+/** * @namespace */
+const Utils = module.exports;
+
+// same reference as other files use, for tidyness
+const utils = Utils;
+
+Utils.request = generateRequest;
+
+/**
+ *  Generates a JSON-RPC 1.0 or 2.0 response
+ *  @param {Object} error Error member
+ *  @param {Object} result Result member
+ *  @param {String|Number|null} id Id of request
+ *  @param {Number} version JSON-RPC version to use
+ *  @return {Object} A JSON-RPC 1.0 or 2.0 response
+ */
+Utils.response = function(error, result, id, version) {
+  id = typeof(id) === 'undefined' || id === null ? null : id;
+  error = typeof(error) === 'undefined' || error === null ? null : error;
+  version = typeof(version) === 'undefined' || version === null ? 2 : version;
+  result = typeof(result) === 'undefined' || result === null ? null : result;
+  const response = (version === 2) ? { jsonrpc: "2.0", id: id } : { id: id };
+
+  // errors are always included in version 1
+  if(version === 1) {
+    response.error = error;
+  }
+
+  // one or the other with precedence for errors
+  if(error) {
+    response.error = error;
+  } else {
+    response.result = result;
+  }
+  return response;
+};
+
+/**
+ *  Generates a random UUID
+ *  @return {String}
+ */
+Utils.generateId = function() {
+  return uuid();
+};
+
+/**
+ *  Merges properties of object b into object a
+ *  @param {...Object} args Objects to be merged
+ *  @return {Object}
+ *  @private
+ */
+Utils.merge = function(...args) {
+  return args.reduce(function (out, obj) {
+    return {...out, ...obj};
+  }, {});
+};
+
+/**
+ * Parses an incoming stream for requests using stream-json
+ * @param {Stream} stream
+ * @param {Object} options
+ * @param {Function} onRequest Called once for stream errors and an unlimited amount of times for valid requests
+ */
+Utils.parseStream = function(stream, options, onRequest) {
+  const onError = Utils.once(onRequest);
+  const onSuccess = (...args) => onRequest(null, ...args);
+
+  const verifier = new Verifier({jsonStreaming: true});
+  const parser = StreamValues.withParser();
+
+  parser.on('data', function(obj) {
+    let data = obj.value;
+
+    // apply reviver walk function to prevent stringify/parse again
+    if(typeof options.reviver === 'function') {
+      data = Utils.walk({'': data}, '', options.reviver);
+    }
+
+    onSuccess(data);
+  });
+
+  parser.on('error', onError);
+  verifier.on('error', onError);
+  stream.on('error', onError);
+
+  stream.pipe(verifier);
+  stream.pipe(parser);
+};
+
+/**
+ * Returns a function that can only be called once
+ * @param {Function} fn
+ * @return {Function}
+ */
+Utils.once = function (fn) {
+  let called = false;
+  let lastRetval;
+  return function (...args) {
+    if (called) return lastRetval;
+    called = true;
+    lastRetval = fn.call(this, ...args);
+  };
+};
+
+/**
+ * Returns true if obj is a plain object (not null)
+ * @param {*} obj
+ * @return {Boolean}
+ */
+Utils.isPlainObject = function (obj) {
+  return typeof obj === 'object' && obj !== null;
+};
+
+/**
+ * Converts an object to an array
+ * @param {*} obj
+ * @return {Array}
+ */
+Utils.toArray = function (obj) {
+  if (Array.isArray(obj)) return obj;
+  if (Utils.isPlainObject(obj)) return Object.keys(obj).map(function (key) {
+    return obj[key];
+  });
+  if (!obj) return [];
+  return Array.prototype.slice.call(obj);
+};
+
+/**
+ * Converts an object to a plain object
+ * @param {*} obj
+ * @return {Object}
+ */
+Utils.toPlainObject = function (value) {
+  value = Object(value);
+  const result = {};
+  for (const key in value) {
+    result[key] = value[key];
+  }
+  return result;
+};
+
+/**
+ * Picks keys from obj
+ * @param {Object} obj
+ * @param {String[]} keys
+ * @return {Object}
+ */
+Utils.pick = function (obj, keys) {
+  return keys.reduce(function (out, key) {
+    out[key] = obj[key];
+    return out;
+  }, {});
+};
+
+/**
+ *  Helper to parse a stream and interpret it as JSON
+ *  @param {Stream} stream Stream instance
+ *  @param {Function} [options] Optional options for JSON.parse
+ *  @param {Function} callback
+ */
+Utils.parseBody = function(stream, options, callback) {
+
+  callback = Utils.once(callback);
+  let data = '';
+
+  stream.setEncoding('utf8');
+
+  stream.on('data', function(str) {
+    data += str;
+  });
+
+  stream.on('error', function(err) {
+    callback(err);
+  });
+
+  stream.on('end', function() {
+    utils.JSON.parse(data, options, function(err, request) {
+      if(err) {
+        callback(err);
+        return;
+      }
+      callback(null, request);
+    });
+  });
+
+};
+
+/**
+ *  Returns a HTTP request listener bound to the server in the argument.
+ *  @param {http.Server} self Instance of a HTTP server
+ *  @param {JaysonServer} server Instance of JaysonServer (typically jayson.Server)
+ *  @return {Function}
+ *  @private
+ */
+Utils.getHttpListener = function(self, server) {
+  return function(req, res) {
+    const options = self.options || {};
+
+    server.emit('http request', req);
+
+    //  405 method not allowed if not POST
+    if(!Utils.isMethod(req, 'POST')) {
+      return respond('Method Not Allowed', 405, {'allow': 'POST'});
+    }
+
+    // 415 unsupported media type if Content-Type is not correct
+    if(!Utils.isContentType(req, 'application/json')) {
+      return respond('Unsupported Media Type', 415);
+    }
+
+    Utils.parseBody(req, options, function(err, request) {
+      if(err) {
+        return respond(err, 400);
+      }
+
+      server.call(request, function(error, success) {
+        const response = error || success;
+        if(!response) {
+          // no response received at all, must be a notification
+          return respond('', 204);
+        }
+
+        utils.JSON.stringify(response, options, function(err, body) {
+          if(err) {
+            return respond(err, 500);
+          }
+
+          const headers = {
+            'content-length': Buffer.byteLength(body, options.encoding),
+            'content-type': 'application/json; charset=utf-8'
+          };
+
+          respond(body, 200, headers);
+        });
+
+      });
+
+    });
+
+    function respond(response, code, headers) {
+      const body = response instanceof Error ? response.toString() : response;
+      server.emit('http response', res, req);
+      res.writeHead(code, headers || {});
+      res.end(body);
+    }
+
+  };
+};
+
+/**
+ *  Determines if a HTTP Request comes with a specific Content-Type
+ *  @param {ServerRequest} request
+ *  @param {String} type
+ *  @return {Boolean}
+ *  @private
+ */
+Utils.isContentType = function(request, type) {
+  request = request || {headers: {}};
+  const contentType = request.headers['content-type'] || '';
+  return RegExp(type, 'i').test(contentType);
+};
+
+/**
+ *  Determines if a HTTP Request is of a specific method
+ *  @param {ServerRequest} request
+ *  @param {String} method
+ *  @return {Boolean}
+ *  @private
+ */
+Utils.isMethod = function(request, method) {
+  method = (method || '').toUpperCase();
+  return (request.method || '') === method;
+};
+
+/**
+ * Recursively walk an object and apply a function on its members
+ * @param {Object} holder The object to walk
+ * @param {String} key The key to look at
+ * @param {Function} fn The function to apply to members
+ * @return {Object}
+ */
+Utils.walk = function(holder, key, fn) {
+  let k, v, value = holder[key];
+  if (value && typeof value === 'object') {
+    for (k in value) {
+      if (Object.prototype.hasOwnProperty.call(value, k)) {
+        v = Utils.walk(value, k, fn);
+        if (v !== undefined) {
+          value[k] = v;
+        } else {
+          delete value[k];
+        }
+      }
+    }
+  }
+  return fn.call(holder, key, value);
+};
+
+/** * @namespace */
+Utils.JSON = {};
+
+/**
+ * Parses a JSON string and then invokes the given callback
+ * @param {String} str The string to parse
+ * @param {Object} options Object with options, possibly holding a "reviver" function
+ * @param {Function} callback
+ */
+Utils.JSON.parse = function(str, options, callback) {
+  let reviver = null;
+  let obj = null;
+  options = options || {};
+
+  if(typeof options.reviver === 'function') {
+    reviver = options.reviver;
+  }
+
+  try {
+    obj = JSON.parse.apply(JSON, [str, reviver].filter(v => v));
+  } catch(err) {
+    callback(err);
+    return;
+  }
+
+  callback(null, obj);
+};
+
+/**
+ * Stringifies JSON and then invokes the given callback
+ * @param {Object} obj The object to stringify
+ * @param {Object} options Object with options, possibly holding a "replacer" function
+ * @param {Function} callback
+ */
+Utils.JSON.stringify = function(obj, options, callback) {
+  let replacer = null;
+  let str = null;
+  options = options || {};
+
+  if(typeof options.replacer === 'function') {
+    replacer = options.replacer;
+  }
+
+  try {
+    str = JSONstringify.apply(JSON, [obj, replacer].filter(v => v));
+  } catch(err) {
+    callback(err);
+    return;
+  }
+
+  callback(null, str);
+};
+
+/** * @namespace */
+Utils.Request = {};
+
+/**
+ * Determines if the passed request is a batch request
+ * @param {Object} request The request
+ * @return {Boolean}
+ */
+Utils.Request.isBatch = function(request) {
+  return Array.isArray(request);
+};
+
+/**
+ * Determines if the passed request is a notification request
+ * @param {Object} request The request
+ * @return {Boolean}
+ */
+Utils.Request.isNotification = function(request) {
+  return Boolean(
+    request
+    && !Utils.Request.isBatch(request)
+    && (typeof(request.id) === 'undefined'
+         || request.id === null)
+  );
+};
+
+/**
+ * Determines if the passed request is a valid JSON-RPC 2.0 Request
+ * @param {Object} request The request
+ * @return {Boolean}
+ */
+Utils.Request.isValidVersionTwoRequest = function(request) {
+  return Boolean(
+    request
+    && typeof(request) === 'object'
+    && request.jsonrpc === '2.0'
+    && typeof(request.method) === 'string'
+    && (
+      typeof(request.params) === 'undefined'
+      || Array.isArray(request.params)
+      || (request.params && typeof(request.params) === 'object')
+    )
+    && (
+      typeof(request.id) === 'undefined'
+      || typeof(request.id) === 'string'
+      || typeof(request.id) === 'number'
+      || request.id === null
+    )
+  );
+};
+
+/**
+ * Determines if the passed request is a valid JSON-RPC 1.0 Request
+ * @param {Object} request The request
+ * @return {Boolean}
+ */
+Utils.Request.isValidVersionOneRequest = function(request) {
+  return Boolean(
+    request
+    && typeof(request) === 'object'
+    && typeof(request.method) === 'string'
+    && Array.isArray(request.params)
+    && typeof(request.id) !== 'undefined'
+  );
+};
+
+/**
+ * Determines if the passed request is a valid JSON-RPC Request
+ * @param {Object} request The request
+ * @param {Number} [version=2] JSON-RPC version 1 or 2
+ * @return {Boolean}
+ */
+Utils.Request.isValidRequest = function(request, version) {
+  version = version === 1 ? 1 : 2;
+  return Boolean(
+    request
+    && (
+      (version === 1 && Utils.Request.isValidVersionOneRequest(request)) ||
+      (version === 2 && Utils.Request.isValidVersionTwoRequest(request))
+    )
+  );
+};
+
+/** * @namespace */
+Utils.Response = {};
+
+/**
+ * Determines if the passed error is a valid JSON-RPC error response
+ * @param {Object} error The error
+ * @param {Number} [version=2] JSON-RPC version 1 or 2
+ * @return {Boolean}
+ */
+Utils.Response.isValidError = function(error, version) {
+  version = version === 1 ? 1 : 2;
+  return Boolean(
+    version === 1 && (
+      typeof(error) !== 'undefined'
+      && error !== null
+    )
+    || version === 2 && (
+      error
+      && typeof(error.code) === 'number'
+      && parseInt(error.code, 10) === error.code
+      && typeof(error.message) === 'string'
+    )
+  );
+};
+
+/**
+ * Determines if the passed object is a valid JSON-RPC response
+ * @param {Object} response The response
+ * @param {Number} [version=2] JSON-RPC version 1 or 2
+ * @return {Boolean}
+ */
+Utils.Response.isValidResponse = function(response, version) {
+  version = version === 1 ? 1 : 2;
+  return Boolean(
+    response !== null
+    && typeof response === 'object'
+    && (version === 2 && (
+      // check version
+      response.jsonrpc === '2.0'
+      && (
+        // check id
+        response.id === null
+        || typeof response.id === 'string'
+        || typeof response.id === 'number'
+      )
+      && (
+        // result and error do not exist at the same time
+        (typeof response.result === 'undefined' && typeof response.error !== 'undefined')
+        || (typeof response.result !== 'undefined' && typeof response.error === 'undefined')
+      )
+      && (
+        // check result
+        (typeof response.result !== 'undefined')
+        // check error object
+        || (
+          response.error !== null
+          && typeof response.error === 'object'
+          && typeof response.error.code === 'number'
+          // check error.code is integer
+          && ((response.error.code | 0) === response.error.code)
+          && typeof response.error.message === 'string'
+        )
+      )
+    )
+      || version === 1 && (
+        typeof response.id !== 'undefined'
+        && (
+          // result and error relation (the other null if one is not)
+          (typeof response.result !== 'undefined' && response.error === null)
+          || (typeof response.error !== 'undefined' && response.result === null)
+        )
+      ))
+  );
+};