How to parse string into url.Values in golang?

You could use url.ParseQuery to convert the raw query to url.Values with unescaping

package main

import (
    "fmt"
    "net/url"
)

func main() {
    t := "honeypot=&name=Zelalem+Mekonen&email=zola%40programmer.net&message=Hello+And+this+is+a+test+message..."
    v, err := url.ParseQuery(t)
    if err != nil {
        panic(err)
    }

    fmt.Println(v)
}

Result:

map[honeypot:[] name:[Zelalem Mekonen] email:[[email protected]] message:[Hello And this is a test message...]]

You could first decode the URL with net/url/QueryUnescape.
It does converts '+' into '' (space).

Then you can start splitting the decoded string, or use net/url/#ParseRequestURI and get the URL.Query.