Adds port/internet connection checks.

Checks when crafty starts for internet and a port forward for Crafty's https port.
Checks on server launch for internet connection and for port forwarding for executed server.

app/classes/shared/helpers.py

@@ -14,6 +14,7 @@ import html
 import zipfile
 import pathlib
 import shutil
+from requests import get
 
 from datetime import datetime
 from socket import gethostname
@@ -76,6 +77,26 @@ class Helpers:
         logger.error("{} does not exist".format(file))
         return True
 
+    @staticmethod
+    def check_internet():
+        try:
+            requests.get('https://google.com', timeout=1)
+            return True
+        except Exception as err: 
+            return False
+
+    @staticmethod
+    def check_port(server_port):
+        host_public = get('https://api.ipify.org').text
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        result = sock.connect_ex((host_public ,server_port))
+        sock.close()
+        if result == 0:
+            return True
+        else:
+            return False
+
+
     def check_for_old_logs(self, db_helper):
         servers = db_helper.get_all_defined_servers()
         for server in servers:

app/classes/shared/server.py

@@ -191,8 +191,20 @@ class Server:
                 'error': msg
             })
             return False
-        websocket_helper.broadcast('send_start_reload', {
-        })
+        if helper.check_internet():
+            loc_server_port = db_helper.get_server_stats_by_id(self.server_id)['server_port']
+            if helper.check_port(loc_server_port):
+                websocket_helper.broadcast('send_start_reload', {
+                })
+            else:
+                websocket_helper.broadcast('send_start_error', {
+                'error': "We have detected port {} may not be open on the host network or a firewall is blocking it. Remote client connections to the server may be limited.".format(loc_server_port)
+            })
+        else:
+            websocket_helper.broadcast('send_start_error', {
+                'error': "We have detected the machine running Crafty has no connection to the internet. Client connections to the server may be limited."
+            })
+
 
         self.process = pexpect.spawn(self.server_command, cwd=self.server_path, timeout=None, encoding='utf-8')
         out_buf = ServerOutBuf(self.process, self.server_id)

app/frontend/templates/base.html

@@ -228,7 +228,12 @@ if (webSocket) {
             var x = document.querySelector('.modal-backdrop');
             if(x){
             x.remove()}
-            bootbox.alert(start_error.error);
+            bootbox.alert({
+              message: start_error.error,
+              callback: function () {
+              location.reload();
+    }
+})
     });
   }
 

main.py

@@ -131,6 +131,11 @@ if __name__ == '__main__':
     # this should always be last
     tasks_manager.start_main_kill_switch_watcher()
 
+    if not helper.check_internet():
+            console.error("We have detected the machine running Crafty has no connection to the internet. Client connections to the server may be limited.")
+    elif not helper.check_port(helper.get_setting('https_port')):
+        console.error("We have detected Crafty's port, {} may not be open on the host network or a firewall is blocking it. Remote client connections to Crafty may be limited.".format(helper.get_setting('https_port')))
+
     Crafty = MainPrompt(tasks_manager, migration_manager)
 
     def sigterm_handler(signum, current_stack_frame):