An introductory guide to learning Go language web development

Learn Go language web development from scratch, you need specific code examples

Foreword:
Go language is an open source programming language, developed and developed by Google First released in 2009. It has gained high attention for its efficient execution speed and concurrency, and is loved by more and more developers. In the field of web development, Go language also has powerful capabilities, concise syntax and rich standard library, making it an ideal choice.

This article will help you learn Go language web development from scratch, let you understand how to use Go language to build a simple web application, and provide specific code examples.

Step one: Install the Go language environment
First, we need to install the Go language development environment. You can download the installation package suitable for your operating system from the official website (https://golang.org/) and install it according to the official documentation.

After the installation is complete, you can enter "go version" in the terminal or command line to verify whether the installation is successful.

Step 2: Set the Go work area
Next, we need to set the Go work area. Open a terminal or command line and execute the following command:

mkdir $HOME/go
export GOPATH=$HOME/go
export PATH=$PATH:$GOPATH/bin

This will set up your Go work area.

Step 3: Create a simple Web application
Now we start to create a simple Web application. First, create a new project folder in Go's workspace, for example "mywebapp".

Enter the folder and create a file named "main.go", write the following code in the file:

package main

import (
    "fmt"
    "log"
    "net/http"
)

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/", helloHandler)
    log.Fatal(http.ListenAndServe(":8080", nil))
}

In the above code, we introduced net/ http package to handle web requests and responses. The helloHandler function is used to process requests for the root path and return "Hello, World!" information to the browser. Use http.HandleFunc in the main function to register the helloHandler function, and use http.ListenAndServe to start a Web server and listen to port 8080.

Step 4: Run the Web application
Next, we need to enter the "mywebapp" folder in the terminal or command line and execute the following command to run the Web application:

go run main.go

If All goes well, you will see a message in the terminal or command line: "Listening on :8080". This means that your web application is already running on local port 8080.

Now, open the browser and enter "http://localhost:8080" in the address bar. You will see the words "Hello, World!" displayed on the browser page. Congratulations, you have successfully built a simple Go language web application!

Conclusion:
Through this article, we learned the basics of Go language web development from scratch and provided a specific code example. Of course, in actual web development, we may involve more content, such as routing, template engines, databases, etc. However, the examples in this article already provide you with a good starting point that you can further expand and improve according to your own needs.

I hope this article will be helpful to you and give you a preliminary understanding of Go language web development. I wish you further achievements in learning and practice!

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