How to build a RESTful API using Golang and deploy to Heroku?

How to build a RESTful API using Golang and deploy it to Heroku? Steps: Install Go and create a new project. Write the API code and start the local server. Create a Heroku account and install the Heroku CLI. Initialize Heroku, create the application and deploy the code. Access the deployed application and view the response returned.

Build a RESTful API using Golang and deploy to Heroku

Golang is a popular backend programming language known for its high efficiency Known for its ease of use. This tutorial will guide you on how to build a RESTful API using Golang and deploy it to Heroku, a well-known cloud platform.

Build Golang RESTful API

1. Install Go: Make sure Go is installed in your system. You can download and install the latest version from its official website.
2. Create a Go project: Create a new Go project in your working directory using the following command:

go mod init restful-api

3. Create API file: Create a file named main.go in your project directory and enter the following code:

package main

import (
    "log"
    "net/http"

    "github.com/gorilla/mux"
)

func main() {
    router := mux.NewRouter()

    router.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("Hello, world!"))
    })

    // 监听端口 8080 的请求
    log.Fatal(http.ListenAndServe(":8080", router))
}

4. Start API: Run the following command to start your API locally:

go run main.go

You should be able to access it in your browser via http://localhost:8080/hello API.

Deploy to Heroku

1. Create a Heroku account: Visit the Heroku website and create an account if you haven't already.
2. Install the Heroku CLI: Follow the instructions in the Heroku documentation to install the Heroku CLI.
3. Initialize Heroku: Go to your project directory and run the following command:

heroku init

4. Create the Heroku application: Create a new Heroku application using the following command:

heroku create restful-api

5. Deploy your application: Push your Go code to the Heroku remote origin:

git push heroku main

6. Browse your application: Your application will be deployed on Heroku and its URL can be accessed using the Heroku CLI:

heroku open

Practical Case

You can use this RESTful API as the basis for building more complex applications. The following is a practical case showing how to use the API to get data from the database:

func getProducts(w http.ResponseWriter, r *http.Request) {
    db := ... // 数据库连接

    var products []Product

    err := db.Select(&products, "SELECT * FROM products")
    if err != nil {
        log.Println(err)
        http.Error(w, http.StatusInternalServerError, http.StatusText(http.StatusInternalServerError))
        return
    }

    json.NewEncoder(w).Encode(products)
}

You can also use the API to create, update, and delete data in the database.

The above is the detailed content of How to build a RESTful API using Golang and deploy to Heroku?. For more information, please follow other related articles on the PHP Chinese website!