You may want to prevent the user of your web application from debugging your website. Specifically, the user should not access browser developer tools by pressing F12 or Ctrl+Shift+J or by clicking on the customize and control > more tools > developer tools. To accomplish this, you can use the following ready-to-use JavaScript code. Method 1: Only when… Read More »
What is CSRF? CSRF is an abbreviation of Cross-Site Request Forgery. It is a script that can send HTTP requests. The victim can be disguised to send a request to the website to achieve the purpose of modifying the website data. CSRF can steal all user cookies after the user clicks a link so that the account is… Read More »
Introduction R2DBC is an asynchronous, non-blocking relational database connection specification. Although some NoSQL database vendors provide reactive database clients for their databases, for most projects, migrating to NoSQL is not an ideal choice. This prompted the birth of a universal, responsive relational database connection specification. As a relational database with a huge user base, MySQL also has a… Read More »
Introduction One-to-many results paging is a prevalent scenario, for example, we want to query the product and product picture information. But many people will encounter the misunderstanding of paging here and get incorrect results. Come to analyze and solve this problem today. Problem analysis Let’s first create a simple commodity table and the corresponding commodity picture relationship table.… Read More »
Idempotency Idempotency means that no matter how many times you execute the request, the result is the same. Speaking of idempotency, you have to say repeated submission. You click the submit button continuously. In theory, this is the same piece of data. The database should only store one item but store multiple items, which violates idempotency. Therefore, we… Read More »
Why do we use scheduled tasks For the static homepage, considering that the data of the page may be maintained by multiple operating personnel and changes frequently, it is made into a scheduled task, that is, the static is performed regularly Performing scheduled tasks in Django can be achieved through the django-crontab extension. Installation Configure installed applications Add… Read More »
We can create a simple heartbeat animation using HTML and CSS without much coding. The only thing we need to do is to add a box and use CSS to display it. First, add a visual box to the page Then, make a heart-shape box Finally, set up the animation. It’s worth noticing that the animation must be… Read More »
It is rumored that fasthttp is faster than Nginx in some scenarios, indicating that fasthttp should be optimized. Let’s do some benchmark performance tests. The first test to run is a simple hello server benchmarking. The following results are obtained on Mac. There may be differences under Linux. fasthttp Nginx with standard modules Nginx with rust actix and… Read More »
The evaluation strategy of a compiler is usually divided into pass-by-call and pass-by-call. Thunk functions are implemented by pass-by-call by the compiler. They often put parameters into a temporary function and then put This temporary function is passed into the function body. This temporary function is called the Thunk function. Evaluation strategy Compiler evaluation strategies are usually divided… Read More »
Generally, RPC is based on the C/S structure. The RPC server corresponds to the network server, and the RPC client corresponds to the network client. However, for some unique scenarios, such as providing an RPC service on the company’s intranet, but unable to connect to the intranet’s server on the external network. At this time, we can refer… Read More »
The following script is to catch dead links (return 404 HTTP status code) under a domain name. Depth-first Search (DFS) After getting the root path, first, take out all the sub-paths, and use urllib to verify these paths. If the verification fails, record them, otherwise use the sub-path as the root path to traverse its sub-paths. Breadth-First Search… Read More »