Added demo mode

src/app.ts

@@ -16,6 +16,7 @@ import CaptainConstants = require('./utils/CaptainConstants')
 import LoginRouter = require('./routes/LoginRouter')
 import UserRouter = require('./routes/UserRouter')
 import InjectionExtractor = require('./injection/InjectionExtractor')
+import Utils from './utils/Utils'
 // import { NextFunction, Request, Response } from 'express'
 
 const httpProxy = httpProxyImport.createProxyServer({})
@@ -146,6 +147,14 @@ httpProxy.on('error', function(err, req, resOriginal) {
 })
 
 app.use(CaptainConstants.netDataRelativePath, function(req, res, next) {
+    if (Utils.isNotGetRequest(req)) {
+        res.writeHead(401, {
+            'Content-Type': 'text/plain',
+        })
+        res.send('Demo mode is for viewing only')
+        return
+    }
+
     httpProxy.web(req, res, {
         target: 'http://' + CaptainConstants.netDataContainerName + ':19999',
     })

src/routes/UserRouter.ts

@@ -9,6 +9,8 @@ import RegistriesRouter = require('./RegistriesRouter')
 import onFinished = require('on-finished')
 import InjectionExtractor = require('../injection/InjectionExtractor')
 import CaptainManager = require('../user/system/CaptainManager')
+import Utils from '../utils/Utils'
+import EnvVars = require('../utils/EnvVars')
 
 const router = express.Router()
 
@@ -18,10 +20,6 @@ router.use('/apps/webhooks/', Injector.injectUserForWebhook())
 
 router.use(Injector.injectUser())
 
-function isNotGetRequest(req: express.Request) {
-    return req.method !== 'GET'
-}
-
 router.use(function(req, res, next) {
     const user = InjectionExtractor.extractUserFromInjected(res).user
 
@@ -58,7 +56,16 @@ router.use(function(req, res, next) {
 
     // All requests except GET might be making changes to some stuff that are not designed for an asynchronous process
     // I'm being extra cautious. But removal of this lock mechanism requires testing and consideration of edge cases.
-    if (isNotGetRequest(req)) {
+    if (Utils.isNotGetRequest(req)) {
+        if (EnvVars.IS_DEMO_MODE) {
+            let response = new BaseApi(
+                ApiStatusCodes.STATUS_ERROR_GENERIC,
+                'Demo mode is only for viewing purposes.'
+            )
+            res.send(response)
+            return
+        }
+
         if (threadLockNamespace[namespace]) {
             let response = new BaseApi(
                 ApiStatusCodes.STATUS_ERROR_GENERIC,

src/utils/EnvVars.ts

@@ -4,6 +4,7 @@ export = {
         CAPTAIN_IS_DEBUG: 'CAPTAIN_IS_DEBUG',
         DEFAULT_PASSWORD: 'DEFAULT_PASSWORD',
         IS_CAPTAIN_INSTANCE: 'IS_CAPTAIN_INSTANCE',
+        IS_DEMO_MODE: 'IS_DEMO_MODE',
     },
 
     BY_PASS_PROXY_CHECK: process.env.BY_PASS_PROXY_CHECK,
@@ -16,5 +17,7 @@ export = {
 
     IS_CAPTAIN_INSTANCE: process.env.IS_CAPTAIN_INSTANCE,
 
+    IS_DEMO_MODE: !!process.env.IS_DEMO_MODE,
+
     DEFAULT_PASSWORD: process.env.DEFAULT_PASSWORD,
 }

src/utils/Utils.ts

@@ -5,4 +5,7 @@ export default class Utils {
         input = input.replace(/^(?:https?:\/\/)?/i, '')
         return input
     }
+    static isNotGetRequest(req: { method: string }) {
+        return req.method !== 'GET'
+    }
 }