def create_app(config_class=Config):
app = Flask(__name__)
app.config.from_object(config_class) # 通知Flask读取并使用配置文件
db.init_app(app) # db对象来表示数据库
migrate.init_app(app, db) # 数据库迁移引擎migrate
login.init_app(app) # 登录管理初始化
mail.init_app(app) # 创建邮件实例，该邮件实例用于发送更改密码验证信息
bootstrap.init_app(app) # CSS框架Bootstrap初始化
moment.init_app(app) # 日期和时间转换成插件格式化
babel.init_app(app) # Flask-Babel正是用于简化翻译工作的
# 如果Elasticsearch服务的URL在环境变量中未定义，则赋值None给app.elasticsearch
app.elasticsearch = Elasticsearch([
app.config['ELASTICSEARCH_URL']
]) if app.config['ELASTICSEARCH_URL'] else None
from app.errors import bp as errors_bp
app.register_blueprint(errors_bp) # 向应用注册错误blueprint
from app.auth import bp as auth_bp
app.register_blueprint(
auth_bp, url_prefix='/auth'
) # url_prefix。 这完全是可选的,Flask提供了给blueprint的路由添加URL前缀的选项
from app.main import bp as main_bp
app.register_blueprint(main_bp)
from app.api import bp as api_bp # 向应用注册API blueprint
app.register_blueprint(api_bp, url_prefix='/api')
if app.config[
'SEND_MAIL'] and not app.debug and not app.testing: # 在Debug和单元测试期间跳过所有这些日志记录
if app.config['MAIL_SERVER']:
auth = None
if app.config['MAIL_USERNAME'] or app.config['MAIL_PASSWORD']:
auth = (app.config['MAIL_USERNAME'],
app.config['MAIL_PASSWORD'])
secure = None
if app.config['MAIL_USE_TLS']:
secure = ()
mailhost = (app.config['MAIL_SERVER'], app.config['MAIL_PORT'])
fromaddr = app.config['MAIL_USERNAME']
toaddrs = app.config['ADMINS']
subject = "Microblog Failure"
credentials = auth
mail_handler = SMTPHandler(mailhost,
fromaddr,
toaddrs,
subject,
credentials=credentials,
secure=secure,
timeout=10)
# 设置要发送邮件日志的格式
mail_handler.setFormatter(
logging.Formatter(
'[%(asctime)s] %(levelname)s in %(module)s: %(message)s'))
mail_handler.setLevel(logging.ERROR) # 设置级别
mail_handler.set_name("failure email") # 设置该条日志配置的名称
app.logger.addHandler(mail_handler)
# 记录日志
if not os.path.exists('logs'):
os.mkdir('logs')
# 设置每个日志文件10M，总共备份10个日志文件
file_handler = RotatingFileHandler('logs/microblog.log',
maxBytes=1024 * 1024 * 10,
backupCount=10)
file_handler.setFormatter(
logging.Formatter(
'%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'
))
file_handler.setLevel(logging.INFO)
app.logger.addHandler(file_handler)
app.logger.setLevel(logging.INFO)
app.logger.info('Microblog startup')
return app
toaddrs = app.config['ADMINS']
subject = "Fruit Supermarket Failure"
credentials = auth
mail_handler = SMTPHandler(mailhost,
fromaddr,
toaddrs,
subject,
credentials=credentials,
secure=secure,
timeout=10)
# 设置要发送邮件日志的格式
mail_handler.setFormatter(
logging.Formatter(
'[%(asctime)s] %(levelname)s in %(module)s: %(message)s'))
mail_handler.setLevel(logging.ERROR) # 设置级别
mail_handler.set_name("failure email") # 设置该条日志配置的名称
app.logger.addHandler(mail_handler)
# 记录日志
if not os.path.exists('logs'):
os.mkdir('logs')
# 设置每个日志文件10M，总共备份10个日志文件
file_handler = RotatingFileHandler('logs/smartscales.log',
maxBytes=1024 * 1024 * 10,
backupCount=10)
file_handler.setFormatter(
logging.Formatter(
'%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'
))
file_handler.setLevel(logging.INFO)
app.logger.addHandler(file_handler)
