Programmer Group

1. Why random verification code is needed Prevent malicious machine registration. The role of verification code: effectively prevent this problem from a specific registered user using a specific program brute force to try to login, in fact, verification code is the current way of many websites, using a relatively simple way to achieve this fun ...

Recently, a data statistics system has been designed. There are hundreds of data statistics dimensions in the system, and the indicators of these data statistics may be adjusted at any time. If the API design of data statistics is implemented one by one based on Java coding, the workload is large and the maintenance cost is high. Finally, it is ...

Safety configuration instruction [TOC] Database security configuration is one of the important links of database management. Security configuration mainly includes password, network access control, audit, etc. Next, we will explain how to realize the password related security configuration in Hangao database. 1 password encrypted storage The pa ...

An article to play with TiDB disaster recovery 1, Background High availability is another major feature of TiDB. All three components of TiDB/TiKV/PD can tolerate partial instance failure without affecting the availability of the whole cluster. The following describes the availability of these three components, the consequences of a single ...

Auth module is a standard permission management system provided by Django. It can provide user identity authentication, user group management, and can be used in combination with admin module. Add 'django.contrib.auth' in installed Apus to use the app, and the auth module is enabled by default model from django.contrib ...

My hobby is to make plans, overturn plans, make plans again, and let others supervise my study, supervise my weight loss, and supervise me to change my bad habits. So I'm going to make a little program for myself. The layout of the applet interface is almost finished. Now let's register and log in your application. 1, Applet side: 1,.wxml <v ...

Most of the statements on the Internet are "if there is a transaction, the current transaction is supported.". Open if no transaction " It's just a silly face... My understanding at the beginning is that if the save method is called, a transaction will be opened when the transaction is executed to userMapper.save. At this time ...

Session object 1. Introduction Session object is the object of database session, which provides the method of interaction with database session object is thread unsafe, so it cannot be used as a global variable 2. Obtaining and closing the session object How to get / create and close: //Get new session object (not commonly us ...

1. Administrator authority control technology Difficulty: how to prevent users from logging into the background management interface over the form Solution: in order to show the feasibility of crossing the form, the author intentionally writes the SESSION variable to the controller in the website program, so that any user can log in ...

DataX3 is still very convenient to use. Here are some official things GitHub address of DataX3 https://github.com/alibaba/DataX , which contains the introduction of DataX3 and download link. How to use DataX3 https://github.com/alibaba/DataX/wiki/Quick-Start Configuration parameters of various reader s and writer s https://github.com/alibab ...