capsul-flask/capsulflask/hub_api.py

from flask import Blueprint
from flask import current_app
from flask import request
from werkzeug.exceptions import abort

from capsulflask.db import get_model
from capsulflask.shared import my_exec_info_message, authorized_as_hub

bp = Blueprint("hub", __name__, url_prefix="/hub")

def authorized_for_host(id):
  if request.headers.get('Authorization'):
    auth_header_value = request.headers.get('Authorization').replace("Bearer ", "")
    return get_model().authorized_for_host(id, auth_header_value)
  return False

@bp.route("/heartbeat-task", methods=("POST",))
def ping_all_hosts_task():
  if authorized_as_hub(request.headers):
    all_hosts = get_model().get_all_hosts()
    current_app.logger.debug(f"pinging {len(all_hosts)} hosts...")
    authorization_header = f"Bearer {current_app.config['HUB_TOKEN']}"
    results = current_app.config["HTTP_CLIENT"].make_requests_sync(all_hosts, "/spoke/heartbeat", None, authorization_header=authorization_header)
    for i in range(len(all_hosts)):
      host = all_hosts[i]
      result = results[i]
      current_app.logger.debug(f"response from {host.id} ({host.url}): {result.status_code} {result.body}")
      if result.status_code == 200:
        get_model().host_heartbeat(host.id)
        
    return "ok"
  else:
    current_app.logger.warning(f"/hub/heartbeat-task returned 401: invalid hub token")
    return abort(401, "invalid hub token")
 

@bp.route("/heartbeat/<string:host_id>", methods=("POST",))
def heartbeat(host_id):
  if authorized_for_host(host_id):
    return "ok"
  else:
    current_app.logger.warning(f"/hub/heartbeat/{host_id} returned 401: invalid token")
    return abort(401, "invalid host id or token")

@bp.route("/claim-operation/<int:operation_id>/<string:host_id>", methods=("POST",))
def claim_operation(operation_id: int, host_id: str):
  if authorized_for_host(host_id):
    exists = get_model().host_operation_exists(operation_id, host_id)
    if not exists:
      return abort(404, "host operation not found")
    claimed = get_model().claim_operation(operation_id, host_id)
    if claimed:
      return "ok"
    else:
      return abort(409, "operation was already assigned to another host")
  else:
    current_app.logger.warning(f"/hub/claim-operation/{operation_id}/{host_id} returned 401: invalid token")
    return abort(401, "invalid host id or token")