flask 添加日志

def add_error_handler(app):
    for exception in default_exceptions:
        app.register_error_handler(exception, error_handler)
    app.register_error_handler(Exception, error_handler)

def error_handler(error):
    description = error.get_description(request.environ) \
        if hasattr(error, 'get_description') else None

    exc_type, exc_value, exc_traceback = sys.exc_info()
    traceback.print_exception(exc_type, exc_value, exc_traceback)

    current_app.logger.error(
        """
        Request:        {method} {path}
        IP:             {ip}
        User:           {user}
        Agent:          {agent_platform} | {agent_browser} {agent_browser_version}
        Raw Agent:      {agent}
        Description:    {description}
        """.format(
            method=request.method,
            path=request.path,
            ip=request.remote_addr,
            agent_platform=request.user_agent.platform,
            agent_browser=request.user_agent.browser,
            agent_browser_version=request.user_agent.version,
            agent=request.user_agent.string,
            user=g.user if hasattr(g, 'user') else None,
            description=description,
        ), exc_info=exc_traceback
    )

    if isinstance(error, HTTPException):
        code = error.code
        if code == 404:
            return make_response(jsonify({'code': 404, 'data': {}, 'msg': 'page not found'}), code)
        else:
            """其他HTTP异常处理暂未定义"""
            pass
    else:
        current_app.logger.error('Internal Server Error')
        return make_response(jsonify({'code': 500, 'data': {}, 'msg': 'Internal Server Error'}))

app = Flask(__name__)
add_error_handler(app)