Update socket.io and uuid packages (nightscout#7793)

* This commit updates the uuid and socket.io packages to latest versions and enables compression over websocket

* Drop the compression threshold down to 512 bytes

* Enable http compression down to 512 bytes and request long poll transport only, as per current release

* Add the socket.io-client back in

* Use polling with the NS client

* Update express to latest in 4.x line, fix tests

Author: sulkaharo

lib/api3/shared/operationTools.js

@@ -2,7 +2,7 @@
 
 const apiConst = require('../const.json')
   , stringTools = require('./stringTools')
-  , uuidv5 = require('uuid/v5')
+  , uuid = require('uuid')
   , uuidNamespace = [...Buffer.from("NightscoutRocks!", "ascii")] // official namespace for NS :-)
   ;
 
@@ -103,7 +103,7 @@ function calculateIdentifier (doc) {
     key += '_' + doc.eventType;
   }
 
-  return uuidv5(key, uuidNamespace);
+  return uuid.v5(key, uuidNamespace);
 }
 
 

lib/client/index.js

@@ -1033,7 +1033,7 @@ client.load = function load (serverSettings, callback) {
   // Client-side code to connect to server and handle incoming data
   ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
   /* global io */
-  client.socket = socket = io.connect();
+  client.socket = socket = io.connect({ transports: ["polling"] });
 
   socket.on('dataUpdate', dataUpdate);
 

lib/server/websocket.js

@@ -69,13 +69,19 @@ function init (env, ctx, server) {
 
   function start () {
     io = require('socket.io')({
-      'transports': ['xhr-polling']
-      , 'log level': 0
+      'log level': 0
     }).listen(server, {
       //these only effect the socket.io.js file that is sent to the client, but better than nothing
       'browser client minification': true
       , 'browser client etag': true
       , 'browser client gzip': false
+      , 'perMessageDeflate': {
+        threshold: 512
+      }
+      , transports: ["polling", "websocket"]
+      , httpCompression: {
+        threshold: 512
+      }
     });
 
     ctx.bus.on('teardown', function serverTeardown () {
@@ -117,7 +123,7 @@ function init (env, ctx, server) {
         delta.status = status(ctx.ddata.profiles);
         lastProfileSwitch = ctx.ddata.lastProfileFromSwitch;
       }
-      io.to('DataReceivers').emit('dataUpdate', delta);
+      io.to('DataReceivers').compress(true).emit('dataUpdate', delta);
     }
   }
 
@@ -179,7 +185,7 @@ function init (env, ctx, server) {
           callback({ result: 'success' });
         }
         //TODO: use opts to only send delta for retro data
-        socket.emit('retroUpdate', { devicestatus: lastData.devicestatus });
+        socket.compress(true).emit('retroUpdate', { devicestatus: lastData.devicestatus });
         console.info('sent retroUpdate', opts);
       });