Build web applications using Golang's web framework Revel

With the continuous development of Internet technology, Web applications have gradually become an indispensable part of people's lives. For web application developers, it is very important to choose an efficient and easy-to-use web framework. In this article, we will introduce how to use Golang's web framework Revel to build web applications, and explore the features and advantages of the Revel framework.

Part One: Introduction to Revel Framework

Revel is a web framework based on Golang language. It supports MVC (Model-View-Controller) mode and provides many powerful functions and tools. Such as routing, request processing, template rendering, database interaction, etc., allowing developers to quickly build high-availability and high-scalability web applications. At the same time, the Revel framework is also very easy to learn and use. Its API documentation is very detailed, allowing developers to quickly apply it to their own projects.

Part 2: Install the Revel framework

Before using the Revel framework, you first need to install it. The installation process is very simple. You only need to execute the following command in the Golang environment:

go get github.com/revel/revel
go get github.com/revel/ cmd/revel

The first command is to download the source code of the Revel framework, and the second command is to install the Revel command line tool, which can help us create, run, and package Revel applications, etc. .

Part 3: Create a Revel application

After the installation is complete, we can use the Revel command line tool to create a new Revel application. Just execute the following command:

revel new <app_name></app_name>

Where, is the name of the application we want to create. Revel will automatically create a folder named in the directory where we execute the command, and generate some basic code files, including routing files, configuration files, controller files, template files, etc.

Part 4: Writing the Controller

In order to add the necessary logic and functionality to our web application, we need to write the controller code. The controller is the "controller" in the MVC pattern, which is responsible for handling requests from the browser and sending the requests to the model or view for processing. In the Revel framework, the controller file is located in the /app/controllers directory. We can create a controller named "App" as follows:

package controllers

import "github.com/revel/revel"

type App struct {
    *revel.Controller
}

func (c App) Index() revel.Result {
    return c.Render()
}

In the above code, we define a controller named The "App" controller uses the Controller structure of the Revel framework and implements a method called "Index". This method returns an object of type Result, representing the view that needs to be displayed.

Part 5: Writing Routes

After defining the controller, we need to define the route. Routing is the mechanism used to map URL requests to corresponding controllers and methods. In the Revel framework, routing files are located in the /conf/routes file. We can define a route in this file as follows:

GET     /           App.Index

In the above code, we define a route named "Index", which means that when the user accesses the root URL of the web application, it should be called "Index" method in controller "App".

Part 6: Start the Revel application

After writing the controller and routing, we can use the Revel command line tool to start our web application. Just execute the following command:

revel run <app_name></app_name>

Where, is the name of the application we created in the third part. The command line tool will start the web server and listen on the specified port.

Part Seven: Testing the Revel Application

After starting the web server, we can use a browser to access the URL of the web application to make sure it is working properly. For example, we can enter in the browser:

http://localhost:9000/

If everything goes well, we should be able to see the base page that has been created .

Summary

The above is some basic knowledge about building Web applications using Golang's Web framework Revel. The Revel framework provides powerful functions and tools, allowing developers to quickly build highly available and highly scalable web applications. At the same time, Revel is also very easy to learn and use, allowing developers to quickly apply it to their own projects. If you haven't tried the Revel framework yet, you might as well download, install and create a simple web application to experience the fun and convenience that Revel brings.

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