Golang is an open source programming language developed by Google. It is known for its efficient performance and concise syntax, especially suitable for developing web applications. This article will deeply explore the essence and characteristics of Golang in web development, and analyze it with specific code examples.
1. The essence and characteristics of Golang
2. Application of Golang in Web development
package main import ( "fmt" "net/http" ) func handler(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello, Go Web!") } func main() { http.HandleFunc("/", handler) http.ListenAndServe(":8080", nil) }
With the above code, we define a simple HTTP processing function handler, register the route in the main function and start the HTTP server.
package main import ( "html/template" "net/http" ) func handler(w http.ResponseWriter, r *http.Request) { tmpl, err := template.New("index").Parse("<h1>Hello, {{.Name}}</h1>") if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } data := map[string]string{"Name": "Golang"} tmpl.Execute(w, data) } func main() { http.HandleFunc("/", handler) http.ListenAndServe(":8080", nil) }
In the above code, we define a template and fill it with data, and then render the template into HTML and return it to the client through the Execute method.
package main import ( "database/sql" "fmt" _ "github.com/go-sql-driver/mysql" ) func main() { db, err := sql.Open("mysql", "user:password@tcp(127.0.0.1:3306)/dbname") if err != nil { fmt.Println(err) return } defer db.Close() rows, err := db.Query("SELECT * FROM users") if err != nil { fmt.Println(err) return } defer rows.Close() for rows.Next() { var id int var name string err := rows.Scan(&id, &name) if err != nil { fmt.Println(err) return } fmt.Printf("ID: %d, Name: %s ", id, name) } }
Through the above example, we can easily establish a connection with the MySQL database, query data and process the returned results.
Summary:
Golang, as a programming language with superior performance and good concurrency support, has shown great strength in Web development. Its concise syntax, efficient compilation speed, and rich standard library make it easier for developers to build Web applications. Through the analysis and code examples of this article, I believe readers have a deeper understanding of the nature and characteristics of Golang in Web development. I hope Golang will continue to grow and bring more innovation and convenience to web development.
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