O que é uma arquitetura de uma aplicação web?

Emmanuel Katende

22 Sept 202205:09

Summary

TLDRThis video provides a quick overview of the architecture of a web application, explaining its two main components: the client-side (frontend), where users interact with the application through their browser, and the server-side (backend), responsible for processing data, handling business logic, and storing information in databases. The presenter clarifies the term 'server,' emphasizing its various uses in computing and its role in handling client requests. The video aims to introduce beginners to web development, highlighting the interaction between frontend and backend, and encouraging viewers to explore more in-depth concepts in future videos.

Takeaways

😀 A web application consists of two main parts: the client-side and the server-side.
🖥️ The client-side (frontend) is what the user interacts with, such as when logging in or clicking to watch a video.
🔍 Frontend refers to the visual interface where users engage with the application through their browser, like Chrome.
🧠 The server-side (backend) handles business logic, processes data, and communicates with databases to store and retrieve information.
💾 The backend serves as the 'brain' of the application, processing user requests and sending data back to the client.
📡 'Server' is a polysemic term, meaning it can refer to various roles in computing, from applications to physical machines.
💻 Application servers run web apps and serve them to browsers for execution, while infrastructure servers host virtual machines for broader tasks.
🌍 Web applications communicate between the frontend and backend through a process known as 'requests.'
🛠️ The frontend/backend interaction involves many layers and technologies, but users typically only see the frontend.
👨‍💻 The video is aimed at guiding people in understanding web development, even if they don't yet know how to code.

Q & A

What are the two main parts of a web application?
-The two main parts of a web application are the client-side (frontend) and the server-side (backend). The client-side is what the user interacts with on the screen, while the server-side processes data and handles business logic.
What is the client-side (frontend) of a web application responsible for?
-The client-side, also known as the frontend, is responsible for displaying content to the user and handling user interactions, such as clicking buttons or entering information.
What does the server-side (backend) of a web application do?
-The server-side processes data, applies business logic, communicates with databases, and sends the necessary information back to the client-side for display.
What is a 'server' in the context of web applications?
-In the context of web applications, a server refers to the part of the application responsible for handling client requests, processing data, and sending the appropriate response back to the frontend.
What does the term 'polissêmico' mean when describing a server?
-The term 'polissêmico' refers to the multiple meanings of the word 'server.' It can be used to describe both a physical machine that hosts applications and the software that processes client requests.
What is the difference between an 'application server' and a 'web server'?
-An application server is responsible for running business logic and managing resources for web applications, while a web server specifically serves web pages to browsers by handling HTTP requests.
What is the role of databases in a web application?
-Databases store and retrieve data used by web applications. The server-side communicates with the database to handle tasks such as storing user information or retrieving requested data.
What does the term 'frontend' refer to in a web application?
-The 'frontend' refers to the part of the web application that users see and interact with, typically through a web browser.
How does the client-side communicate with the server-side in a web application?
-The client-side communicates with the server-side through HTTP requests, which are processed by the server and result in responses sent back to the client.
What is meant by 'backend' in a web application?
-The backend is the part of the web application that the user does not see. It handles data processing, business logic, and communication with the database.

Outlines

00:00

🌐 Overview of Web Application Architecture

This paragraph introduces the concept of web application architecture, explaining that a web application consists of two primary parts: the client side (frontend) and the server side (backend). The client side refers to what users interact with in the browser, such as login forms and videos, while the backend processes data, manages business logic, and stores information in databases. The backend, which the user doesn't see, serves as the brain of the application, handling requests from the client and responding accordingly.

05:04

💡 Understanding the Server in Web Applications

The second paragraph briefly focuses on the concept of a server. It mentions that a server is responsible for handling client requests, supporting the interaction between the frontend and backend of a web application. The term 'server' is polysemic, meaning it can refer to different things in the context of IT, such as application servers or web servers. However, in this case, it refers to the component that processes user requests and sends responses back to the client.

Mindmap

Keywords

💡Web Application

A web application refers to a software program that runs on a web server and can be accessed through a browser. In the video, the speaker discusses the architecture of web applications, emphasizing that they consist of both client-side and server-side components, where users interact with the front end, and data processing occurs in the back end.

💡Client

The client, also known as the front end, is the part of a web application that users interact with directly, typically through a browser. Examples from the video include actions like logging into Facebook or watching a video, which all occur on the client-side, making this the visual and interactive portion of a web application.

💡Server

A server is a machine or system that responds to requests from the client side of a web application. It processes data, applies business logic, and communicates with databases. The video explains how servers serve user requests, manage data, and send responses back to the client, likening the server to the brain of the application.

💡Front End

The front end is the user-facing part of a web application. It includes everything users see and interact with, such as buttons, forms, and visual elements displayed on their browser. In the video, the speaker explains that the front end is a critical aspect of user interaction, allowing users to interact with applications like logging in or clicking on a video.

💡Back End

The back end refers to the server-side of a web application where data processing, storage, and logic occur. It handles user requests and communicates with databases to retrieve or store information. The video contrasts the back end with the front end, describing it as the part that users don't see but that is crucial for making the application function.

💡Business Logic

Business logic refers to the set of rules and operations that dictate how data is processed in a web application. It is implemented on the server-side to manage workflows, computations, and decision-making based on user interactions. The speaker mentions that the server processes data based on rules, indicating the role of business logic in this part of the web architecture.

💡Database

A database is a system used to store, retrieve, and manage data for an application. The video refers to databases as the layer responsible for saving and retrieving data based on user actions on the front end, forming a key part of the back-end architecture.

💡HTTP Requests

HTTP requests are the messages sent from the client to the server when a user performs actions like submitting a form or clicking a button. These requests are processed by the server to fulfill the user's needs. Although not directly named in the video, the concept of requests being sent from the front end to the back end is integral to understanding the communication between client and server.

💡Polissemic Term

A polissemic term has multiple meanings depending on the context in which it is used. The video discusses the word 'server' as an example of a polissemic term, explaining that it can refer to both a physical machine and the software that manages requests in a web application.

💡Infrastructure

Infrastructure in the context of web applications refers to the physical and virtual systems that support the operation of software applications. This includes servers, networking equipment, and storage systems. The video briefly mentions 'infrastructure servers,' highlighting the hardware side of web applications that runs multiple virtual machines and services to support different tasks.

Highlights

A web application is made up of two major parts: the client side, where the user interacts, and the server side, which processes data and business logic.

The client side, also known as the 'frontend,' is what the user sees and interacts with, like logging into Facebook or watching videos in a browser.

The server side, or 'backend,' handles the processing of data, applying business rules, and interacting with databases.

Servers are responsible for sending data to the client side and processing user requests, acting as the 'brain' of the application.

Servers can store and retrieve data from databases and handle tasks invisible to the user but crucial for application functionality.

The term 'server' is often used in different contexts, such as application servers or web servers, which run web applications in browsers.

Application servers handle requests from clients and execute the logic needed for the user interface.

The word 'server' comes from the idea of 'serving' or 'responding to requests' in computing.

Servers are essential in web development, functioning as the backbone of applications, processing and managing data requests.

Infrastructure servers are used to run multiple virtual machines and various applications for different tasks.

The term 'server' has a broad meaning in technology, but in web applications, it refers to the part that responds to client-side requests.

In web development, 'frontend' refers to what users interact with, and 'backend' refers to the server side that processes those interactions.

Communication between frontend and backend is key for a web application to function properly.

Web developers need to understand both the frontend and backend to create full-featured web applications.

Understanding how a server responds to user requests is fundamental to becoming a web developer.