Import contents into Confluence through the user interface using a Puppeteer-controlled browser — What are the options if you have to copy some somewhere existing contents into Confluence? Suppose you would not like to spend time on a boring task of creating pages and pasting the contents. In addition to the ways described in the Confluence documentation, you could automate creating pages and…

Everyone uses filter(), but have you ever used complementary methods dropWhile() and takeWhile()? They can simplify text extraction from formatted documents — The nicest feature of Java language What Java language feature do you like most? Streams stand out in the verbose syntax of Java. var keyword is also relieving. Streams can be regarded as a special form of a loop. In some cases stream syntax results in a code that is shorter than an equivalent for-loop-based code…

Easy session management with Express and Node.js — Passwords annoy users and complicate life of developers. Decent websites provide a possibility to log in with some social identity provider. In this post I use two modern options of sign in with Google to demonstrate that with Node.js web development is relatively easy. With Express library it is easy…

Differences, advantages and disadvantages in two easy ways of streaming data from a server — Normally a web page requests data from a server. But sometimes it is needed that the server keeps sending data to a browser whenever it has something to send and not only when when the browser makes a request. For example, if a web page displays a live log of…

The server-side code protecting from CSRF attacks is doomed to extinction — Cookies are typically used to keep users logged into websites. Previously cookies were sent with any requests. For example, the browser used to send the cookies when a web site requested an image from another web site or with a POST request to another website. This feature of cookies was…

Do you really have to disable console.log() in production? — There are debuggers. But for some developers, it is easier to see the complete picture in the application log. Somehow it is believed that it is fine for a server-side to keep a log, but it is uncommon to see a detailed log on the client-side. Why? Among many abstract…

Useful, potentially useful, not useful and harmful features of the modern Servlet API. — Servlets — the foundation of Java web applications Even if code of a typical web application does not contain many servlets, filters and listeners, all Java web applications are build on top of the Servlet API. In any Java web application HTTP requests are handled by servlets. More visible web technologies such as JAX-RS or Spring libraries MVC…

Node.js clearly excels at I/O operations but does not use the disk cache. Java gets fast when the files are the disk cache — Node.js is believed to be efficient at disk or network operations because, unlike Java, in Node.js all I/O operations are non-blocking unless you intentionally choose a synchronous method. In Java disk or network operations are always blocking execution of the only or additional threads. If you want to make concurrent…

What are the defaults and how to change them? Terrible things that happen if the charset is not specified — If you deal only with English characters you are lucky because you do not face any problems with character encoding. If you deal not only with the Latin alphabet you must have faced at some point boring character encoding-related problems. According to modern specifications and recommendations all the characters transmitted…