Go URL Parsing

by Online Tutorials Library July 14, 2022

Go URL Parsing

Go has good support for url parsing. URL contains a scheme, authentication info, host, port, path, query params, and query fragment. we can parse URL and deduce what are the parameter is coming to the server and then process the request accordingly.

The net/url package has the required functions like Scheme, User, Host, Path, RawQuery etc.

Go URL Parsing Example 1

  package main  import “fmt”  import “net”  import “net/url”  func main() {    p := fmt.Println    s := “Mysql://admin:password@serverhost.com:8081/server/page1?key=value&key2=value2#X”    u, err := url.Parse(s)  if err != nil {  panic(err)  }  p(u.Scheme)//prints Schema of the URL  p(u.User)// prints the parsed user and password  p(u.User.Username())//prints user’s name  pass, _ := u.User.Password()  p(pass)//prints user password  p(u.Host) //prints host and port  host, port, _ := net.SplitHostPort(u.Host) //splits host name and port  p(host)//prints host  p(port)//prints port  p(u.Path)//prints the path  p(u.Fragment)//prints fragment path value  p(u.RawQuery)//prints query param name and value as provided  m, _ := url.ParseQuery(u.RawQuery)//parse query param into map  p(m)//prints param map  p(m[“key2”][0])//prints specific key value  }  

Output:

mysql  admin:password  admin  password  serverhost.com:8081  serverhost.com  8081  /server/page1  X  key=value&key2=value2  map[key:[value] key2:[value2]]  value2

Go URL Parsing Example 2

  package main    import (  “io”  “net/http”  )      func main() {  http.HandleFunc(“/company”, func(res http.ResponseWriter, req *http.Request) {  displayParameter(res, req)  })  println(“Enter the url in browser:  http://localhost:8080/company?name=Tom&age=27”)  http.ListenAndServe(“:8080”, nil)  }  func displayParameter(res http.ResponseWriter, req *http.Request) {  io.WriteString(res, “name: “+req.FormValue(“name”))  io.WriteString(res, “nage: “+req.FormValue(“age”))  }  

Output:

Enter the url in browser: http://localhost:8080/company?name=Tom&age=27

Next TopicHTML Aside tag

Go URL Parsing

Go URL Parsing

Go URL Parsing Example 1

Go URL Parsing Example 2

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URL Encoding in HTTP

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