Go url parameters mapping

Question

Is there a native way for inplace url parameters in native Go?

For Example, if I have a URL: http://localhost:8080/blob/123/test I want to use this URL as /blob/{id}/test.

This is not a question about finding go libraries. I am starting with the basic question, does go itself provide a basic facility to do this natively.

Answer 1

There is no built in simple way to do this, however, it is not hard to do.

This is how I do it, without adding a particular library. It is placed in a function so that you can invoke a simple getCode() function within your request handler.

Basically you just split the r.URL.Path into parts, and then analyse the parts.

// Extract a code from a URL. Return the default code if code
// is missing or code is not a valid number.
func getCode(r *http.Request, defaultCode int) (int, string) {
        p := strings.Split(r.URL.Path, "/")
        if len(p) == 1 {
                return defaultCode, p[0]
        } else if len(p) > 1 {
                code, err := strconv.Atoi(p[0])
                if err == nil {
                        return code, p[1]
                } else {
                        return defaultCode, p[1]
                }
        } else {
                return defaultCode, ""
        }
}