remove socket.io client and require static files to be served from app

lib/manager.js

@@ -14,13 +14,12 @@ var fs = require('fs')
   , crypto = require('crypto')
   , util = require('./util')
   , store = require('./store')
-  , client = require('socket.io-client')
   , transports = require('./transports')
   , Logger = require('./logger')
   , Socket = require('./socket')
   , MemoryStore = require('./stores/memory')
   , SocketNamespace = require('./namespace')
-  , Static = require('./static')
+  , Static = null
   , EventEmitter = require('events').EventEmitter;
 
 /**
@@ -65,7 +64,7 @@ function Manager (server, options) {
     , log: true
     , store: new MemoryStore
     , logger: new Logger
-    , static: new Static(this)
+    , static: new Set(['/socket.io.js']) // Overleaf: set of paths for static serving by app
     , heartbeats: true
     , resource: '/socket.io'
     , transports: defaultTransports
@@ -991,6 +990,11 @@ Manager.prototype.checkRequest = function (req) {
       , path: path
     };
 
+    // Overleaf: pass all static pages back to top-level app
+    if (this.static.has(path)) {
+      return false
+    }
+
     if (pieces) {
       data.protocol = Number(pieces[1]);
       data.transport = pieces[2];

lib/socket.io.js

@@ -9,7 +9,8 @@
  * Module dependencies.
  */
 
-var client = require('socket.io-client');
+// Removed from Overleaf version
+// var client = require('socket.io-client');
 
 /**
  * Version.
@@ -27,7 +28,8 @@ exports.protocol = 1;
  * Client that we serve.
  */
 
-exports.clientVersion = client.version;
+// Removed from Overleaf version
+// exports.clientVersion = client.version;
 
 /**
  * Attaches a manager
@@ -108,7 +110,7 @@ exports.Socket = require('./socket');
  * @api public
  */
 
-exports.Static = require('./static');
+exports.Static = null;
 
 /**
  * Store constructor.