275 lines
10 KiB
Python
275 lines
10 KiB
Python
import falcon
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import simplejson as json
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import mysql.connector
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import config
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import uuid
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from datetime import datetime, timezone
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class GatewayCollection:
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@staticmethod
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def __init__():
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""""Initializes GatewayCollection"""
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pass
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@staticmethod
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def on_options(req, resp):
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resp.status = falcon.HTTP_200
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@staticmethod
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def on_get(req, resp):
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cnx = mysql.connector.connect(**config.myems_system_db)
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cursor = cnx.cursor(dictionary=True)
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query = (" SELECT id, name, uuid, token, last_seen_datetime_utc "
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" FROM tbl_gateways "
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" ORDER BY id ")
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cursor.execute(query)
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rows = cursor.fetchall()
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cursor.close()
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cnx.disconnect()
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result = list()
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if rows is not None and len(rows) > 0:
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for row in rows:
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meta_result = {"id": row['id'], "name": row['name'], "uuid": row['uuid'],
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"token": row['token'],
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"last_seen_datetime":
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row['last_seen_datetime_utc'].replace(tzinfo=timezone.utc).timestamp() * 1000
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if isinstance(row['last_seen_datetime_utc'], datetime) else None,
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}
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result.append(meta_result)
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resp.body = json.dumps(result)
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@staticmethod
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def on_post(req, resp):
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"""Handles POST requests"""
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try:
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raw_json = req.stream.read().decode('utf-8')
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except Exception as ex:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR', description=ex)
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new_values = json.loads(raw_json)
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if 'name' not in new_values['data'].keys() or \
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not isinstance(new_values['data']['name'], str) or \
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len(str.strip(new_values['data']['name'])) == 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_GATEWAY_NAME')
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name = str.strip(new_values['data']['name'])
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cnx = mysql.connector.connect(**config.myems_system_db)
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cursor = cnx.cursor()
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cursor.execute(" SELECT name "
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" FROM tbl_gateways "
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" WHERE name = %s ", (name,))
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if cursor.fetchone() is not None:
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cursor.close()
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cnx.disconnect()
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.GATEWAY_NAME_IS_ALREADY_IN_USE')
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add_values = (" INSERT INTO tbl_gateways (name, uuid, token) "
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" VALUES (%s, %s, %s) ")
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cursor.execute(add_values, (name,
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str(uuid.uuid4()),
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str(uuid.uuid4())))
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new_id = cursor.lastrowid
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cnx.commit()
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cursor.close()
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cnx.disconnect()
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resp.status = falcon.HTTP_201
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resp.location = '/gateways/' + str(new_id)
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class GatewayItem:
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@staticmethod
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def __init__():
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""""Initializes GatewayItem"""
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pass
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@staticmethod
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def on_options(req, resp, id_):
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resp.status = falcon.HTTP_200
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@staticmethod
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def on_get(req, resp, id_):
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if not id_.isdigit() or int(id_) <= 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_GATEWAY_ID')
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cnx = mysql.connector.connect(**config.myems_system_db)
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cursor = cnx.cursor(dictionary=True)
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query = (" SELECT id, name, uuid, token, last_seen_datetime_utc "
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" FROM tbl_gateways "
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" WHERE id =%s ")
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cursor.execute(query, (id_,))
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row = cursor.fetchone()
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cursor.close()
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cnx.disconnect()
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if row is None:
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raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
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description='API.GATEWAY_NOT_FOUND')
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result = {"id": row['id'],
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"name": row['name'],
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"uuid": row['uuid'],
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"token": row['token'],
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"last_seen_datetime":
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row['last_seen_datetime_utc'].replace(tzinfo=timezone.utc).timestamp()*1000
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if isinstance(row['last_seen_datetime_utc'], datetime) else None}
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resp.body = json.dumps(result)
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@staticmethod
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def on_delete(req, resp, id_):
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if not id_.isdigit() or int(id_) <= 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_GATEWAY_ID')
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cnx = mysql.connector.connect(**config.myems_system_db)
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cursor = cnx.cursor()
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cursor.execute(" SELECT name "
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" FROM tbl_gateways "
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" WHERE id = %s ", (id_,))
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if cursor.fetchone() is None:
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cursor.close()
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cnx.disconnect()
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raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
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description='API.GATEWAY_NOT_FOUND')
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# check if this gateway is being used by any data sources
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cursor.execute(" SELECT name "
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" FROM tbl_data_sources "
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" WHERE gateway_id = %s ",
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" LIMIT 1 ",
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(id_,))
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if cursor.fetchone() is not None:
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cursor.close()
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cnx.disconnect()
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raise falcon.HTTPError(falcon.HTTP_400,
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title='API.BAD_REQUEST',
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description='API.THERE_IS_RELATION_WITH_DATA_SOURCES')
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cursor.execute(" DELETE FROM tbl_gateways WHERE id = %s ", (id_,))
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cnx.commit()
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cursor.close()
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cnx.disconnect()
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resp.status = falcon.HTTP_204
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@staticmethod
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def on_put(req, resp, id_):
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"""Handles PUT requests"""
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try:
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raw_json = req.stream.read().decode('utf-8')
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except Exception as ex:
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raise falcon.HTTPError(falcon.HTTP_400, 'API.ERROR', ex)
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if not id_.isdigit() or int(id_) <= 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_GATEWAY_ID')
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new_values = json.loads(raw_json)
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if 'name' not in new_values['data'].keys() or \
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not isinstance(new_values['data']['name'], str) or \
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len(str.strip(new_values['data']['name'])) == 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_GATEWAY_NAME')
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name = str.strip(new_values['data']['name'])
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cnx = mysql.connector.connect(**config.myems_system_db)
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cursor = cnx.cursor()
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cursor.execute(" SELECT name "
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" FROM tbl_gateways "
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" WHERE id = %s ", (id_,))
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if cursor.fetchone() is None:
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cursor.close()
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cnx.disconnect()
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raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
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description='API.GATEWAY_NOT_FOUND')
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cursor.execute(" SELECT name "
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" FROM tbl_gateways "
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" WHERE name = %s AND id != %s ", (name, id_))
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if cursor.fetchone() is not None:
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cursor.close()
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cnx.disconnect()
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.GATEWAY_NAME_IS_ALREADY_IN_USE')
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update_row = (" UPDATE tbl_gateways "
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" SET name = %s "
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" WHERE id = %s ")
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cursor.execute(update_row, (name,
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id_,))
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cnx.commit()
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cursor.close()
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cnx.disconnect()
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resp.status = falcon.HTTP_200
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class GatewayDataSourceCollection:
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@staticmethod
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def __init__():
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""""Initializes GatewayDataSourceCollection"""
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pass
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@staticmethod
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def on_options(req, resp):
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resp.status = falcon.HTTP_200
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@staticmethod
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def on_get(req, resp, id_):
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if not id_.isdigit() or int(id_) <= 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_GATEWAY_ID')
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cnx = mysql.connector.connect(**config.myems_system_db)
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cursor = cnx.cursor(dictionary=True)
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cursor.execute(" SELECT name "
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" FROM tbl_gateways "
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" WHERE id = %s ", (id_,))
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if cursor.fetchone() is None:
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cursor.close()
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cnx.disconnect()
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raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
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description='API.GATEWAY_NOT_FOUND')
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result = list()
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query_data_source = (" SELECT id, name, uuid, "
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" protocol, connection, last_seen_datetime_utc "
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" FROM tbl_data_sources "
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" WHERE gateway_id = %s "
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" ORDER BY name ")
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cursor.execute(query_data_source, (id_,))
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rows_data_source = cursor.fetchall()
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now = datetime.utcnow().replace(second=0, microsecond=0, tzinfo=None)
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if rows_data_source is not None and len(rows_data_source) > 0:
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for row in rows_data_source:
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meta_result = {"id": row['id'],
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"name": row['name'],
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"uuid": row['uuid'],
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"protocol": row['protocol'],
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"connection": row['connection'],
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"last_seen_datetime":
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row['last_seen_datetime_utc'].replace(tzinfo=timezone.utc).timestamp()*1000
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if isinstance(row['last_seen_datetime_utc'], datetime) else None,
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}
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result.append(meta_result)
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cursor.close()
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cnx.disconnect()
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resp.body = json.dumps(result)
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