Parse Input from HTML Forms in Go

In web development, extracting data from HTML forms and processing it in backend code is a common task. In Go, using the Goji framework, this process can be achieved by leveraging the powerful capabilities of the net/http package.

To receive and handle data submitted from an HTML form, you must utilize the ParseForm() method of the http.Request struct. This method parses the incoming request, making the form fields accessible.

The following code snippet demonstrates how to implement this in Goji:

func hello(c web.C, w http.ResponseWriter, r *http.Request) {

    // Parse the form
    err := r.ParseForm()
    if err != nil {
        // Handle error via logging
        return
    }

    // Get the form value associated with the "name" field
    name := r.PostFormValue("name")

    fmt.Fprintf(w, "Hello, %s!", name)
}

In your example, you have correctly defined the form in the HTML file:

Now, to connect your HTML form to the Goji handler, simply register the handler with the framework:

goji.Handle("/hello/", hello)

When a user fills out the form and submits it, the /hello/ endpoint is invoked, and the Goji handler parses the incoming form data, extracts the "name" value, and renders the greeting.

Remember, this solution requires you to call r.ParseForm() before attempting to access the form fields to ensure seamless data handling.