Merge pull request #131 from ysj0226/master

fix bug: Solve cross-domain problems and remove some useless file

apps/connector/.gitignore

@@ -4,4 +4,5 @@ __pycache__/
 .idea/
 connect.db
 not_sqlalchemy/
-run_flask_app.bat
+run_flask_app.bat
+bp_useless

apps/connector/README.md

@@ -2,4 +2,4 @@
 use sqlalchemy to connect database.
 
 It uses a method similar to Superset, and you can refer to its reference documentation.
-https://superset.apache.org/docs/databases/installing-database-drivers/
+https://superset.apache.org/docs/databases/installing-database-drivers/

apps/connector/app.py

@@ -1,12 +1,12 @@
 from flask import Flask
 
-from bp import bp_Druid, bp_Drill, bp_Athena, bp_Clickhouse, bp_Oracle, bp_Sqlite, bp_SQLserver, bp_Doris, bp_Redshift, bp_Mysql, bp_Impala, bp_Kylin, bp_SparkSQL, bp_Postgres
 from bp import bp_database
 from database import init_db
 from database import db_session
+from flask_cors import CORS
 
 app = Flask(__name__)
-
+CORS(app)
 
 @app.route('/')
 def hello_world():  # put application's code here