How to Implement In-Place URL Parameter Mapping in Go?

Go URL Parameters Mapping: In-Place Native Implementation

While Go does not provide a built-in method for in-place URL parameter mapping, it's relatively straightforward to implement it manually.

A solution is to split the URL path into parts and analyze them. For instance, for the URL "http://localhost:8080/blob/123/test", we can extract the parameter value "123" as follows:

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]
        }
    }
    return defaultCode, ""
}

This code snippet can be invoked from a request handler to retrieve the URL parameter. By integrating this functionality into your code, you can achieve in-place URL parameter mapping without relying on external libraries.

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