title: Trouble parsing parameters
body: <p>I'm trying to use a simple method that will take the request and parse the parameters but it returns the wrong number of parameters.</p>
  
  <p>In my main I make a request and then call:</p>
  
  <p><code>fmt.Println(parseParams(r, "http://localhost:8080", 2))</code> </p>
  
  <p>which leads to following values being set in the method when logged:</p>
  
  <p><strong>url:</strong> <code>/api/users</code></p>
  
  <p><strong>params:</strong> <code>[ api users]</code></p>
  
  <p><strong>len(params):</strong> <code>3</code></p>
  
  <p>So it seems as if it think there's one extra param that I don't specify and looking at it more closely I can see theres a space before api in the params but I don't know where that comes from</p>
  
  <pre><code>func parseParams(req *http.Request, prefix string, num int) ([]string, error) {
      url := strings.TrimPrefix(req.URL.Path, prefix)
      params := strings.Split(url, "/")
  
      if len(params) != num || len(params[0]) == 0 || len(params[1]) == 0 {
          return nil, fmt.Errorf("Bad format. Expecting exactly %d params", num)
      }
  
      return params, nil
  }
  </code></pre>