golang ParseQuery url gives me wrong output - go

Question

I have the following code:
func init() {
today := time.Now()
// If ENDPOINT is empty, It'll use this hardcoded endpoint. The ENDPOINT variable should not contain any text after "ModifiedDate gt". The actual date is currentDay-1
if ENDPOINT == "" {
ENDPOINT = "http://localhost:8000/Contacts/Export/?$select=Firstname,Lastname,Email,SubaccountId&$filter=EEA eq '' and ModifiedDate gt"
}
// Append CurrentDay-1 in YYY`enter code here`Y-MM-DDTHH:MM:SSZ format.
// The time is NOT in UTC. It's the local time of the machine on which lambda function was running
ENDPOINT = fmt.Sprintf("%s %s", ENDPOINT, today.AddDate(0, 0, -1).Format("2006-01-02T15:04:05Z"))
var err error
// parse the url
PARSED_ENDPOINT, err = url.Parse(ENDPOINT)
if err != nil {
log.Fatalln("Invalid $ENDPOINT", err)
}
// parse the query parameters
parsedQueryParams, err := url.ParseQuery(PARSED_ENDPOINT.RawQuery)
if err != nil {
log.Fatalln("error in parsing query parameters", err)
}
// URLEncode query parameters
PARSED_ENDPOINT.RawQuery = parsedQueryParams.Encode()
}
When I output the URL, I get:
'http://localhost:8000/Contacts/Export/?%24filter=EEA+eq+%27%27+and+ModifiedDate+gt+2018-10-22T08%3A45%3A45Z&%24select=Email%2CFirstname%2CLastname%2CSubaccountId%2CEEA'
How do I return:
'http://localhost:8000/Contacts/Export/?$filter=EEA%20eq%20%27%27%20and%20ModifiedDate%20gt%202018-10-22T00:00:00Z&$select=Email,Firstname,Lastname,SubaccountId,EEA'
Any advice is much appreciated

Answer 1

Golang provide url package to manage this problem and pass the query string with key values to the browser and parse it accordingly after encoding the string which will resolve special characters issue:
package main
import (
"fmt"
"net/url"
)
func main() {
query := make(url.Values)
query.Add("key", "value")
url := &url.URL{RawQuery: query.Encode(), Host: "foo", Scheme: "http"}
fmt.Println(url)
}
Avoid using string query and adding values using fmt package Sprintf methods.This is not a proper way to manage query strings and creating a dynamic url.