280 lines
9.8 KiB
Python
280 lines
9.8 KiB
Python
import falcon
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import 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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import os
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from core.userlogger import user_logger
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class CostFileCollection:
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@staticmethod
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def __init__():
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""""Initializes CostFileCollection"""
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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_historical_db)
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cursor = cnx.cursor()
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query = (" SELECT id, file_name, uuid, upload_datetime_utc, status "
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" FROM tbl_cost_files "
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" ORDER BY upload_datetime_utc desc ")
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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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upload_datetime = row[3]
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upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
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meta_result = {"id": row[0],
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"file_name": row[1],
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"uuid": row[2],
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"upload_datetime": upload_datetime.timestamp() * 1000,
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"status": row[4]}
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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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@user_logger
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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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upload = req.get_param('file')
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# Read upload file as binary
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raw_blob = upload.file.read()
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# Retrieve filename
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filename = upload.filename
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file_uuid = str(uuid.uuid4())
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# Define file_path
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file_path = os.path.join(config.upload_path, file_uuid)
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# Write to a temporary file to prevent incomplete files from
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# being used.
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temp_file_path = file_path + '~'
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open(temp_file_path, 'wb').write(raw_blob)
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# Now that we know the file has been fully saved to disk
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# move it into place.
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os.rename(temp_file_path, file_path)
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except Exception as ex:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
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description='API.FAILED_TO_UPLOAD_COST_FILE')
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# Verify User Session
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token = req.headers.get('TOKEN')
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user_uuid = req.headers.get('USER-UUID')
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if token is None:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.TOKEN_NOT_FOUND_IN_HEADERS_PLEASE_LOGIN')
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if user_uuid is None:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.USER_UUID_NOT_FOUND_IN_HEADERS_PLEASE_LOGIN')
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cnx_user_db = mysql.connector.connect(**config.myems_user_db)
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cursor_user_db = cnx_user_db.cursor()
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query = (" SELECT utc_expires "
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" FROM tbl_sessions "
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" WHERE user_uuid = %s AND token = %s")
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cursor_user_db.execute(query, (user_uuid, token,))
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row = cursor_user_db.fetchone()
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if row is None:
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if cursor_user_db:
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cursor_user_db.close()
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if cnx_user_db:
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cnx_user_db.disconnect()
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_SESSION_PLEASE_RE_LOGIN')
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else:
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utc_expires = row[0]
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if datetime.utcnow() > utc_expires:
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if cursor_user_db:
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cursor_user_db.close()
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if cnx_user_db:
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cnx_user_db.disconnect()
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.USER_SESSION_TIMEOUT')
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cursor_user_db.execute(" SELECT id "
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" FROM tbl_users "
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" WHERE uuid = %s ",
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(user_uuid,))
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row = cursor_user_db.fetchone()
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if row is None:
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if cursor_user_db:
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cursor_user_db.close()
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if cnx_user_db:
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cnx_user_db.disconnect()
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_USER_PLEASE_RE_LOGIN')
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cnx_historical_db = mysql.connector.connect(**config.myems_historical_db)
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cursor_historical_db = cnx_historical_db.cursor()
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add_values = (" INSERT INTO tbl_cost_files "
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" (file_name, uuid, upload_datetime_utc, status, file_object ) "
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" VALUES (%s, %s, %s, %s, %s) ")
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cursor_historical_db.execute(add_values, (filename,
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file_uuid,
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datetime.utcnow(),
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'new',
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raw_blob))
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new_id = cursor_historical_db.lastrowid
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cnx_historical_db.commit()
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cursor_historical_db.close()
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cnx_historical_db.disconnect()
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resp.status = falcon.HTTP_201
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resp.location = '/costfiles/' + str(new_id)
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class CostFileItem:
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@staticmethod
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def __init__():
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""""Initializes CostFileItem"""
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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,
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title='API.BAD_REQUEST',
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description='API.INVALID_COST_FILE_ID')
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cnx = mysql.connector.connect(**config.myems_historical_db)
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cursor = cnx.cursor()
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query = (" SELECT id, file_name, uuid, upload_datetime_utc, status "
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" FROM tbl_cost_files "
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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.COST_FILE_NOT_FOUND')
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upload_datetime = row[3]
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upload_datetime = upload_datetime.replace(tzinfo=timezone.utc)
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result = {"id": row[0],
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"file_name": row[1],
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"uuid": row[2],
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"upload_datetime": upload_datetime.timestamp() * 1000,
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"status": row[4]}
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resp.body = json.dumps(result)
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@staticmethod
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@user_logger
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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_COST_FILE_ID')
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cnx = mysql.connector.connect(**config.myems_historical_db)
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cursor = cnx.cursor()
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cursor.execute(" SELECT uuid "
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" FROM tbl_cost_files "
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" WHERE id = %s ", (id_,))
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row = cursor.fetchone()
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if row 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.COST_FILE_NOT_FOUND')
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try:
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file_uuid = row[0]
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# Define file_path
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file_path = os.path.join(config.upload_path, file_uuid)
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# remove the file from disk
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os.remove(file_path)
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except Exception as ex:
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# ignore exception and don't return API.COST_FILE_NOT_FOUND error
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pass
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# Note: the energy data imported from the deleted file will not be deleted
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cursor.execute(" DELETE FROM tbl_cost_files 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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class CostFileRestore:
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@staticmethod
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def __init__():
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""""Initializes CostFileRestore"""
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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_COST_FILE_ID')
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cnx = mysql.connector.connect(**config.myems_historical_db)
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cursor = cnx.cursor()
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query = (" SELECT uuid, file_object "
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" FROM tbl_cost_files "
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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.COST_FILE_NOT_FOUND')
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result = {"uuid": row[0],
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"file_object": row[1]}
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try:
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raw_blob = result["file_object"]
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file_uuid = result["uuid"]
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# Define file_path
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file_path = os.path.join(config.upload_path, file_uuid)
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# Write to a temporary file to prevent incomplete files from
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# being used.
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temp_file_path = file_path + '~'
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open(temp_file_path, 'wb').write(raw_blob)
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# Now that we know the file has been fully saved to disk
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# move it into place.
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os.replace(temp_file_path, file_path)
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except Exception as ex:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
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description='API.FAILED_TO_RESTORE_COST_FILE')
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resp.body = json.dumps('success')
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