Connection class part III

WebServer.java

    // continue Connection class...

    // helper method: getting the path to access the requested resource/information hosted by the server (aka routing)
    private static Path getFilePath(String path) {
        Matcher match = Pattern.compile("/watch/").matcher(path);
        if(match.find()){
            // replacing "watch" with "resources" because we have our videos inside that directory
            path = path.replaceAll("/watch/", "./");
            path = path + ".mp4";
            return Paths.get(path);
        }

        if ("/".equals(path)) {
            path = "index.html";
        }else if("/cats".equals(path)){
            path = "cats.html";
        }

        return Paths.get("./public/", path);
    }

    // helper method: guessing the resource extension eg: .html, .mp4 etc
    private static String guessContentType(Path filePath) throws IOException {
        return Files.probeContentType(filePath);
    }

    // helper method: creating response message for the client's request
    private void sendResponse(String status, String contentType, String additional_header, byte[] content) throws IOException {
        byte[] response = (
            "HTTP/1.1 " + status + "\r\n"
            + "Content-Type: " + contentType + "\r\n"
            + additional_header 
            + "\r\n").getBytes("UTF-8");
        out.write(response, 0, response.length);
        out.write(content, 0, content.length);
        out.write("\r\n\r\n".getBytes("UTF-8"));
    }
}