map to URL query string

[enigma]

Hi,
What would be the idiomatic way to create a url query string
(mapToQueryString) from a
map.
m map[stiring] string {
"a": "xZZ",
"b": "sZZ"
}

var url http.URL
url.RawQuery = mapToQueryString(m)
Thanks

[Michael Hoisie]

There isn't a library method to do this, but I've used this code
before:

func Urlencode(data map[string]string) string {
var buf bytes.Buffer
for k, v := range data {
buf.WriteString(http.URLEscape(k))
buf.WriteByte('=')
buf.WriteString(http.URLEscape(v))
buf.WriteByte('&')
}
s := buf.String()
return s[0 : len(s)-1]

[Cody Goodman]

This came in a search recently for me, and there is since what I believe a more idiomatic way of doing this:

For those who want an example to play with: http://play.golang.org/p/kcBAs--SZy

For those who can't be bothered to click through to another link and would otherwise just copy paste the code above:

package main

import (

"fmt"

"net/url"

)

func main() {

// way 1

baseUrl := "http://google.com/search?"

params := url.Values{}

params.Add("query", "keyword")

finalUrl := baseUrl + params.Encode()

fmt.Println(finalUrl)

[michae...@gmail.com]

Yet another take on the same problem: just let the library do all the work.

http://play.golang.org/p/sxmhsLQOYw

baseUrl, err := url.Parse("http://google.com/search")

if err != nil {

log.Fatal(err)

}

params := url.Values{}

params.Add("pass%word", "key%20word")

baseUrl.RawQuery = params.Encode()

fmt.Println(baseUrl)

Michael

[pun...@gmail.com]

This is gold, thanks. I would have never seen that the URL struct had a field for the query values :D