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FFmpeg
A tool to manipualte media file. You can change format of the video, change the video into an audio file, or extract a frame(a screenshot) from a vide
Common in a good painter and a good programmer
Being a good programmer is like a being a good painter. So if I adapt the concept of being a good painter to this programmer world, maybe I can be a d
Properties of Cookies and Environment file
String of text to sign the cookies. Verifies the browser got the cookies from OUR backend. Prevents session highjack.Shows the what kind of backend ga
saveUninitialized and resave
uninitialize session if it is new but not modified. Save session in the db and give cookies to the browser only when the session is modified. (In my p
Session store
Session is created when a browser first reachs to a backend. And browser only gets the sessionID. Problem is that the default server-side session stor
User Authentication
middleware express-session send browser a cookie.Cookies: pieces of information that backend can give to the browser. A way of transporting and sendin
🎣 Hooks (Middleware)
Middleware in Mongoose > Middleware is basically intercepts request and do something inside of the middleware and call next() to pass the request. (Ex
When you set a rules on the schema
There are two parts to make specific requirement for the data to be inserted.more requirements make the data more specific.But there are similar requi
Callback and promise(Async await)
Callback is a function which runs after certain action is executed. Just like EventListener: btn.addEventListener("click", callbackFunction); callback
MongoDB and Mongoose
MongoDB > MongoDB is an open source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like
Sending data to back-end
mixing variable with text #{variableName} Ex) mixing variable with attributes(href, class, id...) \`${variableName}\` (inside backticks) Ex) POST
URL parameters
router.get(":parameter", controller);It is like ${variableName} inside of HTML elements.It lets you put variables inside of the routes.You can check t
Separating and exporting
If the request, router, and controller stored in a single page, it's gonna be very inefficient for editing or finding the specific part of the code. S
Router
Allows you to manage URLs and controllers. Known as "mini application". Router(https://expressjs.com/en/4x/api.htmlRouter let you minimize and or
External Middleware (Morgan)
What is Morgan? > Morgan is HTTP request logger middleware for node.js Morgan link When Morgan function is called, Morgan returns middleware as order
Middleware?
software in the middle 🙄Middle of what => Between Request and Response.All middlewares are handlers, and all handlers are middlewares(?)middleware =
Request & Response
A way servers communicate with users, or servers communicate with each other.A HTTP method, a type of RequestFor example, when a user try to go to a w
Making a server with NodeJS and Express
In the server.jsexpress functionWhat is server(application)?Basically, server is a computer(without monitor or keyboard) which is turned on 24/7 and c