How to Parse HTML Form Data Using Goji in Go?

Parse Input from HTML Form using Goji

Goji is a lightweight HTTP request multiplexer and web framework for Go. This tutorial demonstrates how to retrieve and process form data submitted from an HTML form using Goji.

Consider the following Goji code:

package main

import (
        "fmt"
        "net/http"

        "github.com/zenazn/goji"
        "github.com/zenazn/goji/web"
)

func hello(c web.C, w http.ResponseWriter, r *http.Request) {
        // Parse the form to make form fields available.
        err := r.ParseForm()
        if err != nil {
                // Handle error here via logging and then return            
        }

        name := r.PostFormValue("name")
        fmt.Fprintf(w, "Hello, %s!", name)
}

func main() {
        goji.Handle("/hello/", hello)
        goji.Serve()
}

To receive form data, the ParseForm method must be called on the request object. This makes the form fields accessible through the PostFormValue method.

Next, consider the following HTML form:

<form action="/hello/" method="post">
    <input type="text" name="name" />
</form>

When the form is submitted, the input value for the "name" field will be sent with the POST request.

Finally, to connect the HTML form to the Goji code, ensure the web server is configured to handle POST requests and direct them to the appropriate route.

Note: It's essential to handle any errors that may occur during form parsing to ensure the application responds gracefully to potential issues.

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