freeswitch_flask_gui

• Using Freeswitch GUI

using flask

• export FLASK_APP=freeswitch.py
• export FLASK_DEBUG=True
• setting flask using postgresql
  • export DATABASE_URL="postgresql://freeswitch:password@127.0.0.1:5432/freeswitch"
  • edit config.py and set DATABASE_URL="postgresql://freeswitch:password@127.0.0.1:5432/freeswitch"

using flask with flask-migrate

• step 1: flask db init
• step 2: flask db migrate
• step 1: flask db upgrade

using flask shell with click

@app.cli.command(with_appcontext=False)
def initdb():
    """Initialize the database."""
    # Flask pushes an application context, which brings current_app and g to life. 
    # When the request is complete, the context is removed, along with these variables
    app.app_context().push()
    u = User(username='admin@example.com', domain='abc.com')
    u.set_password('password')
    try:
        db.session.add(u)
        db.session.commit()
        click.echo('Create User/Password successful with admin/password')
    except Exception as e:
        pass
        print(str(e))

• run command flask initdb

Postgres SQL Configuration

• Create user

      postgres# CREATE USER "freeswitch" WITH PASSWORD 'password';
  

• Create database

      postgres# CREATE DATABASE freeswitch;
  

• Grant privileges

      postgres# grant all privileges on database freeswitch to freeswitch;
  

• Testing connection to database

      [hadn@localhost ~]$ psql -d freeswitch -U freeswitch -W -h 127.0.0.1
  

freeswitch user table

username	domain	toll_allow	context	max_calls	caller_number	outbound_caller_number	caller_name	outbound_caller_name
string	string	string	string	integer	integer	integer	string	string
1000	abc.com	local,domestic	default	1	1000	+84966734472	Do Nguyen Ha	Do Nguyen Ha

Running flask with gunicorn, nginx web proxy and systemd

• create flask_app.service in /etc/systemd/system/
• reference link of gunicorn with systemd
• the content:

[Unit]
Description = Flask GUI for Freeswitch
After = network.target
After = postgresql-9.6.service

[Service]
PermissionsStartOnly = true
PIDFile = /run/flask_app/flask_app.pid
User = hadn
Group = hadn
WorkingDirectory = /mnt/fs_gui
ExecStartPre = /bin/mkdir /run/flask_app
ExecStartPre = /bin/chown -R hadn:hadn /run/flask_app
ExecStart = /home/hadn/.local/share/virtualenvs/flask_large_admin_gui-EPTiH8UD/bin/gunicorn freeswitch:app -b 127.0.0.1:8000 -w 4 --pid /run/flask_app/flask_app.pid
ExecReload = /bin/kill -s HUP $MAINPID
ExecStop = /bin/kill -s TERM $MAINPID
ExecStopPost = /bin/rm -rf /run/flask_app
PrivateTmp = true

[Install]
WantedBy = multi-user.target

• nginx configuration and reference link

server {
    # listen on port 80 (http)
    listen 80;
    server_name _;
    location / {
        # redirect any requests to the same URL but on https
        return 301 https://$host$request_uri;
    }
}
server {
    # listen on port 443 (https)
    listen 443 ssl;
    server_name _;

    # location of the self-signed SSL certificate
    ssl_certificate /home/ubuntu/microblog/certs/cert.pem;
    ssl_certificate_key /home/ubuntu/microblog/certs/key.pem;

    # write access and error logs to /var/log
    access_log /var/log/microblog_access.log;
    error_log /var/log/microblog_error.log;

    location / {
        # forward application requests to the gunicorn server
        proxy_pass http://localhost:8000;
        proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location /static {
        # handle static files directly, without forwarding to the application
        alias /mnt/fs_gui/flask_app/static;
        expires 30d;
    }
}