Simple path parameter parsing function for Go

params.go

// pathParams parses the URL.Path of the Request with the given
// pattern, and extracts the value for each segment into a map.
func pathParams(r *http.Request, pattern string) map[string]string {
	params := map[string]string{}
	pathSegs := strings.Split(strings.Trim(r.URL.Path, "/"), "/")
	for i, seg := range strings.Split(strings.Trim(pattern, "/"), "/") {
		if i > len(pathSegs)-1 {
			return params
		}
		params[seg] = pathSegs[i]
	}
	return params
}