Overview

Query function of the URL instance can be used to get the query params present in a URL

https://pkg.go.dev/net/url#URL.Query

Note that query param is represented as below in Golang

https://pkg.go.dev/net/url#Values

which is

map[string][]string

which actually means a particular query param key value can have one or multiple values.

Example

http://localhost:8080/products?filters=color&filters=price&order=asc

In this URL filters key has two values – color and price while order key has only one value asc

Program

Let’s see a working example

package main

import (
	"fmt"
	"log"
	"net/url"
)

func main() {
	input_url := "http://localhost:8080/products?filters=color&filters=price&order=asc"
	u, err := url.Parse(input_url)
	if err != nil {
		log.Fatal(err)
	}

	queryParams := u.Query()

	fmt.Println(queryParams)

	fmt.Println(queryParams["filters"])

	fmt.Println(queryParams["order"])

}

Output

map[filters:[color price] order:[asc]]
[color price]
[asc]

Note: Check out our Golang Advanced Tutorial. The tutorials in this series are elaborative and we have tried to cover all concepts with examples. This tutorial is for those who are looking to gain expertise and a solid understanding of golang – Golang Advance Tutorial

Also if you are interested in understanding how all design patterns can be implemented in Golang. If yes, then this post is for you –All Design Patterns Golang