updated documents, added validation to user input strings

term= query option to specify TERM environment variable for host, valid
strings are alpha-numeric with a hypen (validated). Otherwise the
default ssh.term variable from `config.json` will be used.
- validation for host (v4,v6,fqdn,hostname), port (integer 2-65535),
and header (sanatized) from URL input

ChangeLog.md

@@ -2,6 +2,7 @@
 ## [Unreleased]
 ### Added
 - This ChangeLog.md file
+- Support for UTF-8 characters (thanks @bara666)
 - Snyk, Bithound, Travis CI
 - Cross platform improvements (path mappings)
 - Session fixup between Express and Socket.io
@@ -11,6 +12,8 @@
 and events in the application (not including the ssh2 module debug)
 - using Grunt to pull js and css source files from other modules `npm run build` to rebuild these if changed or updated.
 - `useminified` option in `config.json` to enable using minified client side javascript (true) defaults to false (non-minified)
+- term= query option to specify TERM environment variable for host, valid strings are alpha-numeric with a hypen (validated). Otherwise the default ssh.term variable from `config.json` will be used.
+- validation for host (v4,v6,fqdn,hostname), port (integer 2-65535), and header (sanatized) from URL input
 
 ### Changed
 - error handling in public/client.js
@@ -25,10 +28,12 @@ and events in the application (not including the ssh2 module debug)
 - sourcemaps of all minified code (in /public/src and /public/src/js)
 - renamed `client.htm` to `client-full.htm`
 - created `client-min.htm` to serve minified javascript
+- if header.text is null in config.json and header is not defined as a get parameter the Header will not be displayed. Both of these must be null / undefined and not specified as get parameters.
 
 ### Fixed
 - Multiple errors may ovewrite status bar which would cause confusion as to what originally caused the error. Example, ssh server disconnects which prompts a cascade of events (conn.on('end'), socket.on('disconnect'), conn.on('close')) and the original reason (conn.on('end')) would be lost and the user would erroneously receive a WEBSOCKET error as the last event to fire would be the websocket connection closing from the app.
 - ensure ssh session is closed when a browser disconnects from the websocket
+- if headerBackground is changed, status background is changed to the same color (typo, fixed)
 
 ### Removed
 - Express Static References directly to module source directories due to concatenating and minifying js/css

README.md

@@ -23,11 +23,11 @@ You will be prompted for credentials to use on the SSH server via HTTP Basic aut
 
 # Options (GET request vars)
 
-port= - port of SSH server (defaults to 22)
+* **port=** - _integer_ - port of SSH server (defaults to 22)
 
-header= - optional header to display on page
+* **header=** - _string_ - optional header to display on page
 
-headerBackground= - optional background color of header to display on page 
+* **headerBackground=** - _string_ - optional background color of header to display on page 
 
 # Config File Options
 `config.json` contains several options which may be specified to customize to your needs, vs editing the javascript direclty. This is JSON format so mind your spacing, brackets, etc...
@@ -48,7 +48,7 @@ headerBackground= - optional background color of header to display on page
 
 * **useminified** - _boolean_ - Choose between ./public/client-full.htm (false/non-minified) or ./public/client-min.htm (true/minified js), defaults to false (non-minified version)
 
-* **header.text** - _string_ - Specify header text, defaults to `My Header` but may also be set to `null`.
+* **header.text** - _string_ - Specify header text, defaults to `My Header` but may also be set to `null`. When set to `null` no header bar will be displayed on the client.
 
 * **header.background** - _string_ - Header background, defaults to `green`.
 

config.json

@@ -14,7 +14,7 @@
   },
   "useminified": false,
   "header": {
-    "text": "My Header",
+    "text": null,
     "background": "green"
   },
   "session": {

index.js

@@ -11,6 +11,7 @@ var path = require('path')
 var config = require('read-config')(path.join(__dirname, 'config.json'))
 var myutil = require('./util')
 var socket = require('./socket/index.js')
+var validator = require('validator')
 var session = require('express-session')({
   secret: config.session.secret,
   name: config.session.name,
@@ -40,17 +41,21 @@ app.disable('x-powered-by')
 app.get('/ssh/host/:host?', function (req, res, next) {
   res.sendFile(path.join(path.join(__dirname, 'public', (config.useminified) ? 'client-min.htm' : 'client-full.htm')))
   // capture and assign variables
+  myHost = validator.isIP(req.params.host) ? req.params.host : undefined
+  console.log('req.params.host: ', myHost)
   req.session.ssh = {
-    host: req.params.host || config.ssh.host,
+    host: validator.isIP(req.params.host + '') && req.params.host || validator.isFQDN(req.params.host) && req.params.host || /^(([a-z]|[A-Z]|[0-9]|[!^(){}\-_~])+)?\w$/.test(req.params.host) && req.params.host || config.ssh.host,
-    port: req.query.port || config.ssh.port,
+    port: validator.isInt(req.query.port + '', {min: 1, max: 65535}) && req.query.port || config.ssh.port,
     header: {
       name: req.query.header || config.header.text,
       background: req.query.headerBackground || config.header.background
     },
     algorithms: config.algorithms,
-    term: config.ssh.term,
+    term: /^(([a-z]|[A-Z]|[0-9]|[!^(){}\-_~])+)?\w$/.test(req.query.sshterm) && req.query.sshterm || config.ssh.term,
-    allowreplay: req.headers.allowreplay || false
+    allowreplay: validator.isBoolean(req.headers.allowreplay + '') || false
   }
+  req.session.ssh.header.name && validator.escape(req.session.ssh.header.name)
+  req.session.ssh.header.background && validator.escape(req.session.ssh.header.background)
 })
 
 // static files

package.json

@@ -34,7 +34,8 @@
     "express-session": "^1.15.3",
     "read-config": "^1.6.0",
     "socket.io": "^1.6.0",
-    "ssh2": "^0.5.4"
+    "ssh2": "^0.5.4",
+    "validator": "^7.0.0"
   },
   "scripts": {
     "start": "node index",

public/src/js/client.js

@@ -99,7 +99,7 @@ socket.on('connect', function () {
   }).on('statusBackground', function (data) {
     document.getElementById('status').style.backgroundColor = data
   }).on('allowreplay', function (data) {
-    if (data === 'true') {
+    if (data == true) {
       console.log('allowreplay: ' + data)
       document.getElementById('credentials').style.display = 'inline'
     } else {

public/webssh2.js

@@ -12605,7 +12605,7 @@ socket.on('connect', function () {
   }).on('statusBackground', function (data) {
     document.getElementById('status').style.backgroundColor = data
   }).on('allowreplay', function (data) {
-    if (data === 'true') {
+    if (data == true) {
       console.log('allowreplay: ' + data)
       document.getElementById('credentials').style.display = 'inline'
     } else {

socket/index.js

@@ -51,13 +51,12 @@ module.exports = function (socket) {
   conn.on('ready', function () {
     console.log('webssh2 Login: user=' + socket.request.session.username + ' from=' + socket.handshake.address + ' host=' + socket.request.session.ssh.host + ' port=' + socket.request.session.ssh.port + ' sessionID=' + socket.request.sessionID + '/' + socket.id + ' allowreplay=' + socket.request.session.ssh.allowreplay + ' term=' + socket.request.session.ssh.term)
     socket.emit('title', 'ssh://' + socket.request.session.ssh.host)
-    socket.emit('headerBackground', socket.request.session.ssh.header.background)
+    socket.request.session.ssh.header.background && socket.emit('headerBackground', socket.request.session.ssh.header.background)
-    socket.emit('header', socket.request.session.ssh.header.name)
+    socket.request.session.ssh.header.name && socket.emit('header', socket.request.session.ssh.header.name)
     socket.emit('footer', 'ssh://' + socket.request.session.username + '@' + socket.request.session.ssh.host + ':' + socket.request.session.ssh.port)
     socket.emit('status', 'SSH CONNECTION ESTABLISHED')
-    socket.emit('statusBackground', socket.request.session.ssh.header.background)
+    socket.emit('statusBackground', 'green')
     socket.emit('allowreplay', socket.request.session.ssh.allowreplay)
-
     conn.shell({
       term: socket.request.session.ssh.term,
       cols: termCols,

src/js/client.js

@@ -99,7 +99,7 @@ socket.on('connect', function () {
   }).on('statusBackground', function (data) {
     document.getElementById('status').style.backgroundColor = data
   }).on('allowreplay', function (data) {
-    if (data === 'true') {
+    if (data == true) {
       console.log('allowreplay: ' + data)
       document.getElementById('credentials').style.display = 'inline'
     } else {