# Module `onionr.onionrservices.connectionserver`

Onionr - Private P2P Communication

This module does the second part of the bootstrap block handshake and creates the API server

Source code

    '''
        Onionr - Private P2P Communication

        This module does the second part of the bootstrap block handshake and creates the API server
    '''
    '''
        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <https://www.gnu.org/licenses/>.
    '''
    from gevent.pywsgi import WSGIServer
    from stem.control import Controller
    from flask import Flask
    import logger, httpapi
    import onionrexceptions, config, filepaths
    from netcontroller import get_open_port
    from httpapi import apiutils
    from onionrutils import stringvalidators, basicrequests, bytesconverter
    from . import httpheaders
    import deadsimplekv as simplekv

    class ConnectionServer:
        def __init__(self, peer, address, comm_inst=None):

            if not stringvalidators.validate_pub_key(peer):
                raise ValueError('Peer must be valid base32 ed25519 public key')

            socks = config.get('tor.socksport') # Load config for Tor socks port for proxy
            service_app = Flask(__name__) # Setup Flask app for server.
            service_port = get_open_port()
            service_ip = apiutils.setbindip.set_bind_IP()
            http_server = WSGIServer(('127.0.0.1', service_port), service_app, log=None)
            comm_inst.service_greenlets.append(http_server)
            key_store = simplekv.DeadSimpleKV(filepaths.cached_storage)

            # TODO define basic endpoints useful for direct connections like stats

            httpapi.load_plugin_blueprints(service_app, blueprint='direct_blueprint')

            @service_app.route('/ping')
            def get_ping():
                return "pong!"

            @service_app.route('/close')
            def shutdown_server():
                comm_inst.service_greenlets.remove(http_server)
                http_server.stop()
                return Response('goodbye')

            @service_app.after_request
            def afterReq(resp):
                # Security headers
                resp = httpheaders.set_default_onionr_http_headers(resp)
                return resp

            with Controller.from_port(port=config.get('tor.controlPort')) as controller:
                # Connect to the Tor process for Onionr
                controller.authenticate(config.get('tor.controlpassword'))
                # Create the v3 onion service for the peer to connect to
                response = controller.create_ephemeral_hidden_service({80: service_port}, await_publication = True, key_type='NEW', key_content = 'ED25519-V3')

                try:
                    for x in range(3):
                        attempt = basicrequests.do_post_request('http://' + address + '/bs/' + response.service_id, port=socks)
                        if attempt == 'success':
                            break
                    else:
                        raise ConnectionError
                except ConnectionError:
                    # Re-raise
                    raise ConnectionError('Could not reach %s bootstrap address %s' % (peer, address))
                else:
                    # If no connection error, create the service and save it to local global key store
                    peer = bytesconverter.bytes_to_str(peer)
                    key_store.put('dc-' + peer, response.service_id)
                    key_store.flush()
                    logger.info('hosting on %s with %s' % (response.service_id,  peer))
                    http_server.serve_forever()
                    http_server.stop()
                    key_store.delete('dc-' + peer)

## Classes

`class ConnectionServer (peer, address, comm_inst=None)`
  Source code

      class ConnectionServer:
          def __init__(self, peer, address, comm_inst=None):

              if not stringvalidators.validate_pub_key(peer):
                  raise ValueError('Peer must be valid base32 ed25519 public key')

              socks = config.get('tor.socksport') # Load config for Tor socks port for proxy
              service_app = Flask(__name__) # Setup Flask app for server.
              service_port = get_open_port()
              service_ip = apiutils.setbindip.set_bind_IP()
              http_server = WSGIServer(('127.0.0.1', service_port), service_app, log=None)
              comm_inst.service_greenlets.append(http_server)
              key_store = simplekv.DeadSimpleKV(filepaths.cached_storage)

              # TODO define basic endpoints useful for direct connections like stats

              httpapi.load_plugin_blueprints(service_app, blueprint='direct_blueprint')

              @service_app.route('/ping')
              def get_ping():
                  return "pong!"

              @service_app.route('/close')
              def shutdown_server():
                  comm_inst.service_greenlets.remove(http_server)
                  http_server.stop()
                  return Response('goodbye')

              @service_app.after_request
              def afterReq(resp):
                  # Security headers
                  resp = httpheaders.set_default_onionr_http_headers(resp)
                  return resp

              with Controller.from_port(port=config.get('tor.controlPort')) as controller:
                  # Connect to the Tor process for Onionr
                  controller.authenticate(config.get('tor.controlpassword'))
                  # Create the v3 onion service for the peer to connect to
                  response = controller.create_ephemeral_hidden_service({80: service_port}, await_publication = True, key_type='NEW', key_content = 'ED25519-V3')

                  try:
                      for x in range(3):
                          attempt = basicrequests.do_post_request('http://' + address + '/bs/' + response.service_id, port=socks)
                          if attempt == 'success':
                              break
                      else:
                          raise ConnectionError
                  except ConnectionError:
                      # Re-raise
                      raise ConnectionError('Could not reach %s bootstrap address %s' % (peer, address))
                  else:
                      # If no connection error, create the service and save it to local global key store
                      peer = bytesconverter.bytes_to_str(peer)
                      key_store.put('dc-' + peer, response.service_id)
                      key_store.flush()
                      logger.info('hosting on %s with %s' % (response.service_id,  peer))
                      http_server.serve_forever()
                      http_server.stop()
                      key_store.delete('dc-' + peer)