Added support for remote SSH host and user name

README.md

@@ -1,7 +1,11 @@
 Wetty = Web + tty
 -----------------
 
-Terminal over http. Wetty is an alternative to ajaxterm/anyterm but much better than them because wetty uses ChromeOS'  terminal emulator (hterm) which is a full fledged implementation of terminal emulation written entirely in Javascript. Also it uses websockets instead of Ajax and hence better response time.
+Terminal over HTTP and HTTPS. Wetty is an alternative to
+ajaxterm/anyterm but much better than them because wetty uses ChromeOS'
+terminal emulator (hterm) which is a full fledged implementation of
+terminal emulation written entirely in Javascript. Also it uses
+websockets instead of Ajax and hence better response time.
 
 hterm source - https://chromium.googlesource.com/apps/libapps/+/master/hterm/
 
@@ -11,35 +15,47 @@ Install
 -------
 
 *  `git clone https://github.com/krishnasrinivas/wetty`
-  
+
 *  `cd wetty`
 
 *  `npm install`
 
-Run on http:
+Run on HTTP:
 -----------
-  `node app.js -p 3000`
 
-If you run it as root it will launch /bin/login (where you can specify the username), else it will launch ssh to localhost and you can specify the sshport using --sshport option and specify username in address bar like this:
+    node app.js -p 3000
+
+If you run it as root it will launch `/bin/login` (where you can specify
+the user name), else it will launch `ssh` and connect by default to
+`localhost`.
+
+If instead you wish to connect to a remote host you can specify the
+`--sshhost` option, the SSH port using the `--sshport` option and the
+SSH user using the `--sshuser` option.
+
+You can also specify the SSH user name in the address bar like this:
 
   `http://yourserver:3000/wetty/ssh/<username>`
 
-Run on https:
+Run on HTTPS:
 ------------
-Always use https! If you don't have ssl certificates from CA you can create a self signed certificate using this command:
+
+Always use HTTPS! If you don't have SSL certificates from a CA you can
+create a self signed certificate using this command:
 
   `openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 30000 -nodes`
 
 And then run:
 
-  `node app.js --sslkey key.pem --sslcert cert.pem -p 3000`
+    node app.js --sslkey key.pem --sslcert cert.pem -p 3000
 
-Again, if you run it as root it will launch /bin/login, else it will launch ssh to localhost as explained above.
+Again, if you run it as root it will launch `/bin/login`, else it will
+launch SSH to `localhost` or a specified host as explained above.
 
 Run wetty behind nginx:
 ----------------------
 
-Put the following config in nginx's conf:
+Put the following configuration in nginx's conf:
 
     location /wetty {
 	    proxy_pass http://127.0.0.1:3000/wetty;
@@ -54,13 +70,17 @@ Put the following config in nginx's conf:
 	    proxy_set_header X-NginX-Proxy true;
     }
 
-If you are running app.js as root and have nginx proxy you have to use:
-    `http://yourserver.com/wetty`
-Else if you are running app.js as a regular user you have to use:
-    `http://yourserver.com/wetty/ssh/<username>`
+If you are running `app.js` as `root` and have an Nginx proxy you have to use:
 
-Note that if your nginx is configured for https you should run wetty without ssl.
+    http://yourserver.com/wetty
+
+Else if you are running `app.js` as a regular user you have to use:
+
+    http://yourserver.com/wetty/ssh/<username>
+
+**Note that if your Nginx is configured for HTTPS you should run wetty without SSL.**
 
 Issues
 ------
+
 Does not work on Firefox as hterm was written for ChromeOS. So works well on Chrome.

app.js

@@ -6,7 +6,6 @@ var ws = require('websocket').server;
 var pty = require('pty.js');
 var fs = require('fs');
 
-
 var opts = require('optimist')
     .options({
         sslkey: {
@@ -17,10 +16,18 @@ var opts = require('optimist')
             demand: false,
             description: 'path to SSL certificate'
         },
+        sshhost: {
+            demand: false,
+            description: 'ssh server host'
+        },
         sshport: {
             demand: false,
             description: 'ssh server port'
         },
+        sshuser: {
+            demand: false,
+            description: 'ssh user'
+        },
         port: {
             demand: true,
             alias: 'p',
@@ -30,11 +37,21 @@ var opts = require('optimist')
 
 var runhttps = false;
 var sshport = 22;
+var sshhost = 'localhost';
+var globalsshuser = '';
 
 if (opts.sshport) {
     sshport = opts.sshport;
 }
 
+if (opts.sshhost) {
+    sshhost = opts.sshhost;
+}
+
+if (opts.sshuser) {
+    globalsshuser = opts.sshuser;
+}
+
 if (opts.sslkey && opts.sslcert) {
     runhttps = true;
     opts['ssl'] = {};
@@ -42,7 +59,6 @@ if (opts.sslkey && opts.sslcert) {
     opts.ssl['cert'] = fs.readFileSync(path.resolve(opts.sslcert));
 }
 
-
 process.on('uncaughtException', function(e) {
     console.error('Error: ' + e);
 });
@@ -78,8 +94,11 @@ wss.on('request', function(request) {
         sshuser = request.resource;
         sshuser = sshuser.replace('/wetty/ssh/', '');
     }
-    if (sshuser)
+    if (sshuser) {
         sshuser = sshuser + '@';
+    } else if (globalsshuser) {
+        sshuser = globalsshuser + '@';
+    }
     conn.on('message', function(msg) {
         var data = JSON.parse(msg.utf8Data);
         if (!term) {
@@ -90,11 +109,11 @@ wss.on('request', function(request) {
                     rows: 30
                 });
             } else {
-                term = pty.spawn('ssh', [sshuser + 'localhost', '-p', sshport], {
+                term = pty.spawn('ssh', [sshuser + sshhost, '-p', sshport], {
                     name: 'xterm-256color',
                     cols: 80,
                     rows: 30
-                });                
+                });
             }
             term.on('data', function(data) {
                 conn.send(JSON.stringify({