转到：表示没有查询字符串的路径

Question

How do I represent a path without query string?

Eg.:

• www.example.com/user instead of
• www.example.com/user?id=1

The following code didn't work:

Go:

if r.URL.Path[4:] != "" {
    //do something
}

Answer 1

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
}