Can Native Go Handle URL Parameters?

Mapping URL Parameters in Native Go

Can native Go handle inline URL parameters? Consider the URL http://localhost:8080/blob/123/test, which we aim to map to /blob/{id}/test. This question explores Go's native capabilities for such mappings without relying on external libraries.

Native Approach:

Native Go does not offer a straightforward mechanism for this task. However, implementing it manually is relatively simple.

The following function, getCode(), parses the request URL and extracts the code from the first part of the path:

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, ""
        }
}

• The strings.Split function divides the path into parts.
• If there is only one part, return the default code and the sole part.
• If there are multiple parts, attempt to convert the first part into an integer (code). If successful, return the code and the second part. If not, return the default code and the second part.
• Otherwise, return the default code and an empty string.

This function provides a basic way to map URL parameters in native Go, enabling you to interact with URLs like /blob/{id}/test effectively.

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