305 lines
13 KiB
JavaScript
305 lines
13 KiB
JavaScript
/*
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* vim: ts=4:sw=4:expandtab
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*/
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;(function () {
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'use strict';
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window.textsecure = window.textsecure || {};
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function MessageReceiver(url, username, password, signalingKey) {
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this.url = url;
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this.signalingKey = signalingKey;
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this.username = username;
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this.password = password;
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var unencoded = textsecure.utils.unencodeNumber(username);
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this.number = unencoded[0];
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this.deviceId = unencoded[1];
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this.connect();
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}
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MessageReceiver.prototype = {
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constructor: MessageReceiver,
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connect: function() {
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// initialize the socket and start listening for messages
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if (this.socket && this.socket.readyState !== WebSocket.CLOSED) {
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this.socket.close();
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}
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console.log('opening websocket');
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this.socket = new WebSocket(
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this.url.replace('https://', 'wss://').replace('http://', 'ws://')
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+ '/v1/websocket/?login=' + encodeURIComponent(this.username)
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+ '&password=' + encodeURIComponent(this.password)
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);
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this.socket.onclose = this.onclose.bind(this);
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this.socket.onerror = this.onerror.bind(this);
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this.socket.onopen = this.onopen.bind(this);
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this.wsr = new WebSocketResource(this.socket, {
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handleRequest: this.handleRequest.bind(this),
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keepalive: { path: '/v1/keepalive', disconnect: true }
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});
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},
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close: function() {
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this.wsr.close();
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delete this.listeners;
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},
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onopen: function() {
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console.log('websocket open');
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},
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onerror: function(error) {
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console.log('websocket error');
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},
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onclose: function(ev) {
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var eventTarget = this;
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console.log('websocket closed', ev.code);
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// possible 403 or network issue. Make an request to confirm
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TextSecureServer.getDevices(this.number).
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then(this.connect.bind(this)). // No HTTP error? Reconnect
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catch(function(e) {
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var ev = new Event('error');
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ev.error = e;
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eventTarget.dispatchEvent(ev);
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});
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},
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handleRequest: function(request) {
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this.wsr.resetKeepAliveTimer();
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// TODO: handle different types of requests. for now we only expect
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// PUT /messages <encrypted IncomingPushMessageSignal>
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textsecure.crypto.decryptWebsocketMessage(request.body, this.signalingKey).then(function(plaintext) {
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var envelope = textsecure.protobuf.Envelope.decode(plaintext);
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// After this point, decoding errors are not the server's
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// fault, and we should handle them gracefully and tell the
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// user they received an invalid message
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request.respond(200, 'OK');
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if (envelope.type === textsecure.protobuf.Envelope.Type.RECEIPT) {
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this.onDeliveryReceipt(envelope);
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} else if (envelope.content) {
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this.handleContentMessage(envelope);
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} else if (envelope.legacyMessage) {
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this.handleLegacyMessage(envelope);
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} else {
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throw new Error('Received message with no content and no legacyMessage');
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}
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}.bind(this)).catch(function(e) {
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request.respond(500, 'Bad encrypted websocket message');
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console.log("Error handling incoming message:", e);
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var ev = new Event('error');
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ev.error = e;
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this.dispatchEvent(ev);
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}.bind(this));
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},
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getStatus: function() {
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if (this.socket) {
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return this.socket.readyState;
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} else {
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return -1;
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}
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},
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onDeliveryReceipt: function (envelope) {
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var ev = new Event('receipt');
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ev.proto = envelope;
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this.dispatchEvent(ev);
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},
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decrypt: function(envelope, ciphertext) {
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return textsecure.protocol_wrapper.decrypt(
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envelope.source,
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envelope.sourceDevice,
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envelope.type,
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ciphertext
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).catch(function(error) {
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var ev = new Event('error');
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ev.error = error;
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ev.proto = envelope;
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this.dispatchEvent(ev);
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throw error; // reject this promise
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}.bind(this));
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},
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handleSentMessage: function(destination, timestamp, message) {
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return processDecrypted(message, this.number).then(function(message) {
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var ev = new Event('sent');
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ev.data = {
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destination : destination,
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timestamp : timestamp.toNumber(),
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message : message
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};
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this.dispatchEvent(ev);
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}.bind(this));
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},
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handleDataMessage: function(envelope, message, close_session) {
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if ((message.flags & textsecure.protobuf.DataMessage.Flags.END_SESSION) ==
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textsecure.protobuf.DataMessage.Flags.END_SESSION ) {
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close_session();
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}
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return processDecrypted(message, envelope.source).then(function(message) {
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var ev = new Event('message');
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ev.data = {
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source : envelope.source,
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timestamp : envelope.timestamp.toNumber(),
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message : message
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};
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this.dispatchEvent(ev);
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}.bind(this));
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},
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handleLegacyMessage: function (envelope) {
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return this.decrypt(envelope, envelope.legacyMessage).then(function(result) {
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var plaintext = result[0]; // array buffer
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var close_session = result[1]; // function
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var message = textsecure.protobuf.DataMessage.decode(plaintext);
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return this.handleDataMessage(envelope, message, close_session);
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}.bind(this));
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},
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handleContentMessage: function (envelope) {
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return this.decrypt(envelope, envelope.content).then(function(result) {
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var plaintext = result[0]; // array buffer
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var close_session = result[1]; // function
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var content = textsecure.protobuf.Content.decode(plaintext);
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if (content.syncMessage) {
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return this.handleSyncMessage(envelope, content.syncMessage);
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} else if (content.dataMessage) {
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return this.handleDataMessage(envelope, content.dataMessage, close_session);
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} else {
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throw new Error('Got Content message with no dataMessage and no syncMessage');
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}
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}.bind(this));
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},
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handleSyncMessage: function(envelope, syncMessage) {
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if (envelope.source !== this.number) {
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throw new Error('Received sync message from another number');
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}
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if (envelope.sourceDevice == this.deviceId) {
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throw new Error('Received sync message from our own device');
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}
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if (syncMessage.sent) {
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var sentMessage = syncMessage.sent;
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return this.handleSentMessage(
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sentMessage.destination,
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sentMessage.timestamp,
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sentMessage.message
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);
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} else if (syncMessage.contacts) {
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this.handleContacts(syncMessage.contacts);
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} else if (syncMessage.groups) {
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this.handleGroups(syncMessage.groups);
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} else {
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throw new Error('Got SyncMessage with no sent, contacts, or groups');
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}
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},
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handleContacts: function(contacts) {
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var eventTarget = this;
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var attachmentPointer = contacts.blob;
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return handleAttachment(attachmentPointer).then(function() {
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var contactBuffer = new ContactBuffer(attachmentPointer.data);
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var contactDetails = contactBuffer.next();
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while (contactDetails !== undefined) {
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var ev = new Event('contact');
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ev.contactDetails = contactDetails;
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eventTarget.dispatchEvent(ev);
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contactDetails = contactBuffer.next();
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}
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eventTarget.dispatchEvent(new Event('contactsync'));
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});
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},
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handleGroups: function(groups) {
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var eventTarget = this;
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var attachmentPointer = groups.blob;
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return handleAttachment(attachmentPointer).then(function() {
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var groupBuffer = new GroupBuffer(attachmentPointer.data);
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var groupDetails = groupBuffer.next();
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while (groupDetails !== undefined) {
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(function(groupDetails) {
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groupDetails.id = getString(groupDetails.id);
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textsecure.storage.groups.getGroup(groupDetails.id).
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then(function(existingGroup) {
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if (existingGroup === undefined) {
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return textsecure.storage.groups.createNewGroup(
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groupDetails.members, groupDetails.id
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);
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} else {
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return textsecure.storage.groups.updateNumbers(
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groupDetails.id, groupDetails.members
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);
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}
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}).then(function() {
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var ev = new Event('group');
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ev.groupDetails = groupDetails;
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eventTarget.dispatchEvent(ev);
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});
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})(groupDetails);
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groupDetails = groupBuffer.next();
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}
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});
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},
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/* Implements EventTarget */
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dispatchEvent: function(ev) {
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if (!(ev instanceof Event)) {
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throw new Error('Expects an event');
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}
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if (this.listeners === null || typeof this.listeners !== 'object') {
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this.listeners = {};
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}
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var listeners = this.listeners[ev.type];
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if (typeof listeners === 'object') {
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for (var i=0; i < listeners.length; ++i) {
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if (typeof listeners[i] === 'function') {
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listeners[i].call(null, ev);
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}
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}
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}
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},
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addEventListener: function(eventName, callback) {
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if (typeof eventName !== 'string') {
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throw new Error('First argument expects a string');
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}
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if (typeof callback !== 'function') {
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throw new Error('Second argument expects a function');
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}
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if (this.listeners === null || typeof this.listeners !== 'object') {
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this.listeners = {};
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}
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var listeners = this.listeners[eventName];
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if (typeof listeners !== 'object') {
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listeners = [];
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}
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listeners.push(callback);
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this.listeners[eventName] = listeners;
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},
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removeEventListener: function(eventName, callback) {
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if (typeof eventName !== 'string') {
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throw new Error('First argument expects a string');
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}
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if (typeof callback !== 'function') {
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throw new Error('Second argument expects a function');
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}
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if (this.listeners === null || typeof this.listeners !== 'object') {
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this.listeners = {};
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}
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var listeners = this.listeners[eventName];
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for (var i=0; i < listeners.length; ++ i) {
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if (listeners[i] === callback) {
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listeners.splice(i, 1);
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return;
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}
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}
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this.listeners[eventName] = listeners;
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}
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};
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textsecure.MessageReceiver = function(url, username, password, signalingKey) {
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var messageReceiver = new MessageReceiver(url, username, password, signalingKey);
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this.addEventListener = messageReceiver.addEventListener.bind(messageReceiver);
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this.removeEventListener = messageReceiver.removeEventListener.bind(messageReceiver);
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this.getStatus = messageReceiver.getStatus.bind(messageReceiver);
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this.close = messageReceiver.close.bind(messageReceiver);
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};
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textsecure.MessageReceiver.prototype = {
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constructor: textsecure.MessageReceiver
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};
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}());
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