Training Guide: Programming in HTML5 with JavaScript and CSS3 Ebook

Lesson 1: Getting started with Node.js CHAPTER 8 359

The response has a writeHead method to write headers. There is also a write method to

write HTML to the browser. Finally, you can use the end method to send the last bit of HTML

to the browser and close the connection.

In the command prompt window, run the application by executing the following

command.

node app

After the application is running, open the browser and enter the following URL.

http://localhost:8080/HelloForm.html

You see the webpage, as shown in Figure 8-9.

FIGURE 8-9 he HelloForm.html webpage retrievedT

Entering a name in the text box and clicking the Submit button presents the form data to

the server. The QueryString is processed, and the result is displayed, as shown in Figure 8-10.

FIGURE 8-10 he result displayedT

In this example, when you click the Submit button, the URL changes to the following.

http://localhost:8080/SubmitHello?userName=Glenn

The routing in the app.js file matches the resource of SubmitHello and then executes the

code associated with the resource. In the code, userName is retrieved from the QueryString.