URL parsing in Go

In this small blog we will see how we can parse a raw url and extract all the important info from it. We will use Go’s net/url library for this.

Let’s understand different components of URL.

https :// username:password @ example.com:8080 /url-parsing-in-GO? go=best # section

• https - Scheme

• username:password - User

• example.com:8080 - Host ( host - example.com & port- 8080 )

• /url-parsing-in-GO - Path

• go=best - Query ( query is like key:value pairs after ? sign )

• section - Fragment(after #sign)

package main

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

func main () {
    rawURL := "https://username:password@example.com:8080/url-parsing-in-GO?go=best#section"
    mainURL, err := url.Parse(rawURL)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("Scheme:", mainURL.Scheme)
    fmt.Println("User: ", mainURL.User)
    fmt.Println("Host: ", mainURL.Host)
    fmt.Println("Path: ", mainURL.Path)
    fmt.Println("Fragment: ", mainURL.Fragment)
    fmt.Println("Query: ", mainURL.RawQuery)

    host, port, _ := net.SplitHostPort(mainURL.Host)
    fmt.Printf("Host: %s Port: %s\n", host, port)

    fmt.Printf("User: %s \t", mainURL.User.Username())
    p, _ := mainURL.User.Password()
    fmt.Printf("Password: %s", p)
}

$ go run main.go

Scheme: https
User:  username:password
Host:  example.com:8080
Path:  /url-parsing-in-GO
Fragment:  section
Query:  go=best
Host: example.com Port: 8080
User: username  Password: password