Beginner

Introduction This is a repost of the article from zenn. This is the 6th day article for Go Advent Calendar 2021. Since there are incredibly understandable books by Eric Evans sensei and predecessors about DDD, I recommend reading these. (laugh) Domain-Driven Design Modeling/Implementation Guide Domain-Driven Design Sample Code & FAQ Introduction to Domain-Driven Design: Understanding from Bottom-Up! Basics of Domain-Driven Design So here, without detailed explanation of DDD, I’ll explain how to incorporate domain knowledge into software using models with Golang, with a simple concrete example. ...

Conclusion First This is a repost of the article from zenn. To understand Redux, if you can understand this diagram (source: Redux Application Data Flow), you’re 90% there. From user input, (ActionCreator) creates an Action Dispatch (send) the Action to Store (where state is managed) Pass the dispatched Action to Reducer (where state is changed) Store saves the new State created by Reducer Reference data from Store and render in View (screen) If there are any corrections like “This is wrong!” or “This mechanism is also used!”, please give me feedback! (That’s partly why I’m writing this!) ...

URL-embedded Session ID Overview Sessions can be embedded in URIs. PHP, Java, ASP.NET and others support this. http://example.jp/mail/123?SESSIONID=XXXXXXX Issues: Session IDs leak externally via the Referer header (What is the Referer header) The Referer header allows servers to identify where people are visiting from, and can be used for analysis, logging, and cache optimization. Countermeasures: Prohibit URL-embedded sessions themselves Attack Methods and Impact Attack flow: Start page (transitions to another page) ...

Simple Infrastructure Design We’ll Create This Time When constructing infrastructure on AWS, clicking through the console from the browser every time often resulted in missing or incorrect settings in security groups and route tables, which was troublesome. Therefore, this time we’ll use a tool called Terraform that builds the infrastructure environment just by writing and executing code, automating the construction. First, let’s look at the completed diagram. Like this, we’ll create the simplest design possible with just EC2 on VPC. ...

HTTP Basics What is HTTP? You probably only have the impression of it being at the beginning of URLs like http://…..com, right? If we search for HTTP on Wikipedia: Hypertext Transfer Protocol (HTTP) is a communication protocol used for sending and receiving content such as HTML. It is mainly used for transfer between web browsers and web servers on the World Wide Web. In Japanese standard specifications, it is also called hypertext transfer protocol. ...