Make toobusy.maxLag configurable

Signed-off-by: Toshinori Notake <toshi.notake.43568@gmail.com>

lib/config/default.js

@@ -56,6 +56,8 @@ module.exports = {
   // socket.io
   heartbeatInterval: 5000,
   heartbeatTimeout: 10000,
+  // toobusy-js
+  responseMaxLag: 70,
   // document
   documentMaxLength: 100000,
   // image upload setting, available options are imgur/s3/filesystem/azure

lib/config/environment.js

@@ -33,6 +33,7 @@ module.exports = {
   dbURL: process.env.CMD_DB_URL,
   sessionSecret: process.env.CMD_SESSION_SECRET,
   sessionLife: toIntegerConfig(process.env.CMD_SESSION_LIFE),
+  responseMaxLag: toIntegerConfig(process.env.CMD_RESPONSE_MAX_LAG),
   imageUploadType: process.env.CMD_IMAGE_UPLOAD_TYPE,
   imgur: {
     clientID: process.env.CMD_IMGUR_CLIENTID

lib/config/hackmdEnvironment.js

@@ -28,6 +28,7 @@ module.exports = {
   dbURL: process.env.HMD_DB_URL,
   sessionSecret: process.env.HMD_SESSION_SECRET,
   sessionLife: toIntegerConfig(process.env.HMD_SESSION_LIFE),
+  responseMaxLag: toIntegerConfig(process.env.HMD_RESPONSE_MAX_LAG),
   imageUploadType: process.env.HMD_IMAGE_UPLOAD_TYPE,
   imgur: {
     clientID: process.env.HMD_IMGUR_CLIENTID

lib/web/middleware/tooBusy.js

@@ -2,8 +2,11 @@
 
 const toobusy = require('toobusy-js')
 
+const config = require('../../config')
 const response = require('../../response')
 
+toobusy.maxLag(config.responseMaxLag);
+
 module.exports = function (req, res, next) {
   if (toobusy()) {
     response.errorServiceUnavailable(res)