Programmer Group

Alamofire Background Download Background download Let's take a look at Apple's native background download first. Alamofire Background Download Background download Since iOS 7, Apple has launched NSURLSession, enabling background downloads. Let's take a look at Apple's native background downl ...

In webform, the process of validation is roughly as follows:     In AOP:     In Filter:     AuthorizeAttribute permission validation After login, you have the right to control. Some pages need user login to access. You need to add a validation to the visiting pages, and you can't use every action once. 1. Write a Custom Authori ...

background Party A's father: During the National Day and the Military Games, the new access business needs to inspect the business daily and send an email to inform the specific situation!Division I: No problem.Party A's father: Holidays should be issued, too.Division I: No problem (grass mud horse). Initially, it was planned to designate seve ...

In the past, the authentication method of blog was session. Recently, I took some time to change it to jwt, and I learned about JWT by the way. The introduction of JWT can be seen Ruan Yifeng's Articles. jwt implementation process The figure above is the simplest jwt process. When token expires or fails, it will jump back to the login page. B ...

I believe you all use Wechat, and also know the existence of the web version of Wechat. Today we are going to talk about how to make a fully automated micro-communication robot by simulating the web version of the micro-communication interface. This is the first part of this practical project, which focuses on how to realize a landing process. ...

I believe you all use Wechat, and also know the existence of the web version of Wechat. Today we are going to talk about how to make a fully automated micro-communication robot by simulating the web version of the micro-communication interface. This is the first part of the actual combat project, which ...

Through blog posts: Nginx+Tomcat to achieve load balancing cluster instance, can follow!!!LVS Load Balancing Cluster ExplanationWe have been able to use Nginx and LVS as load balancing cluster. They have their own characteristics. Today, we know a popular cluster scheduling tool, Haproxy. I. Overview of Haproxy Haproxy is a popular cluster sch ...

Today's Content 1. Session Technology 1. Cookie 2. Session 2. JSP: Getting Started Session Technology 1. Session: A session contains multiple requests and responses. *One session: the first time a browser sends a request to a server resource, the session is established until one of the parties ...

Recently, users occasionally reported that some HTTP interfaces had timeout problems, while Trace monitoring on the web service side did not have any abnormal situations such as HTTP return value 503. This usually happens when the web container has a problem and the client connects to it. Arthas is an open source Java diagnostic tool for Aliba ...

After mysql 5.7, the processing of group by is different. Here we do some research based on a demo. Official documents: https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_only_full_group_by   demand Statistical user login times, display user Id and name, as follows ...