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How to do it…

In this recipe, we will create a simple HTML form that has two input fields and a button to submit the form. Perform the following steps:

Create login-form.html inside the templates directory, as follows:

$ mkdir templates && cd templates && touch login-form.html

Copy the following content to login-form.html:

<html>
  <head>
    <title>First Form</title>
  </head>
  <body>
    <h1>Login</h1>
    <form method="post" action="/login">
      <label for="username">Username</label>
      <input type="text" id="username" name="username">
      <label for="password">Password</label>
      <input type="password" id="password" name="password">
      <button type="submit">Login</button>
    </form>
  </body>
</html>

The preceding template has two textboxes—username and password—along with a Login button.

On clicking the Login button, the client will make a POST call to an action defined in an HTML form, which is /login in our case.

Create html-form.go, where we will parse the form template and write it onto an HTTP response stream, as follows:

package main
import 
(
  "html/template"
  "log"
  "net/http"
)
const 
(
  CONN_HOST = "localhost"
  CONN_PORT = "8080"
)
func login(w http.ResponseWriter, r *http.Request) 
{
  parsedTemplate, _ := template.ParseFiles("templates/
  login-form.html")
  parsedTemplate.Execute(w, nil)
}
func main() 
{
  http.HandleFunc("/", login)
  err := http.ListenAndServe(CONN_HOST+":"+CONN_PORT, nil)
  if err != nil 
  {
    log.Fatal("error starting http server : ", err)
    return
  }
}

With everything in place, the directory structure should look like the following:

Run the program with the following command:

$ go run html-form.go