Connection class part II

WebServer.java

    // continue Connection class...

    // overiding run method from Thread class
    public void run(){
        // Initializing a Scanner class to read stream input from the
        // socket connection between server and client
        Scanner scan = new Scanner(this.in, "UTF-8");
        try{ 
            // separating the HTTP request header from rest of the HTTP message
            // "\\r\\n\\r\\n" below refers to the 'empty line' from fig.1
            String requestHeader = scan.useDelimiter("\\r\\n\\r\\n").next();

            System.out.println("*********Header Data***********");
            System.out.println("*******************************");
            System.out.println(requestHeader);
            System.out.println("*******************************\n\n");

            // decomposing request header to understand client request message
            String[] headerLines = requestHeader.split("\r\n");
            String[] startLine = headerLines[0].split(" ");

            String method = startLine[0];  // GET method
            String path = startLine[1];    // index.html
            String version = startLine[2]; // HTTP version

            // handling GET request from the client
            if (method.equals("GET")) {
                // calling helper method to search and get the path that
                // leads to the resource client is looking for
                Path filePath = getFilePath(path);

                System.out.println("file path: " + filePath);
                // checking if resource path exists
                if (Files.exists(filePath)) {
                    // file exist
                    // calling helper method to guess the file extension 
                    // type like .html, .mp4, etc
                    String contentType = guessContentType(filePath);

                    System.out.println("file exist");
                    System.out.println("content type:" + contentType);

                    // calling helper method and setting standard HTTP 
                    // status code, response type, and response content
                    sendResponse("200 OK", contentType, "", Files.readAllBytes(filePath));

                } else {
                    // file not found
                    System.out.println("File not found");

                    byte[] notFoundContent = "<h1> File not found :( </h1>".getBytes("UTF-8");

                    sendResponse("404 Not Found", "text/html", "", notFoundContent);
                }
                out.flush();
                break;
            }
        } catch(Exception e) {
            System.out.println("EOF:"+e);
        } finally {
            scan.close();
            try {
                clientSocket.close();
            }catch (IOException e){
                /*close failed*/
            }
        }
    }
    // continue...