How do I represent a path without query string?
Eg.:
www.example.com/userinstead ofwww.example.com/user?id=1
The following code didn't work:
Go:
if r.URL.Path[4:] != "" {
//do something
}
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2 Answers
func main() {
req, err := http.NewRequest("GET", "http://www.example.com/user?id=1", nil)
if err != nil {
log.Fatal(err)
}
// get host
fmt.Printf("%v\n", req.Host) // Output: www.example.com
// path without query string
fmt.Printf("%v\n", req.URL.Path) // Output: /user
// get query string value by key
fmt.Printf("%v\n", req.URL.Query().Get("id")) // Output: 1
// raw query string
fmt.Printf("%v\n", req.URL.RawQuery) // Output: id=1
}
Go play
Comments
To add parameters to an url, you would use Values().
That means, an URL without any parameters would have its 'Values' length set to 0:
if len(r.URL.Query()) == 0 {
}
That should be the same as the r.URL.RawQuery suggested by Dewy Broto in the comments:
if r.URL.RawQuery == "" {
}
Or you can check for the presence if the key 'id' in the Values() map.
if r.URL.Query().Get("id") == "" {
//do something here
}
7 Comments
user3918985
I used a simpler r.URL.Query() which gives me a map. However, if r.URL.Query != nil didn't work.
VonC
@user3918985 did you try
r.URL.Values(), to see if that works better?user3918985
yup, I get this error: r.URL.Values undefined (type *url.URL has no field or method Values)
user3918985
same error. I removed Values and it somehow still didn't register.
VonC
@user3918985 but at least, it does compile, right? I mean
URL.Query (golang.org/pkg/net/url/#URL.Query) does return Values, on which you can try Get("id") |