What Is HTTP Response?

This section describes what is HTTP response - The message that returns back to the client from the server after processed an HTTP request. An HTTP response contains a status line, some header lines, and an optional entity body.

What Is HTTP Response? Based on HTTP/1.1 protocol, after receiving and interpreting an HTTP request from a client, a server must respond with an HTTP response with different elements using the following format:



Rules about the response format and elements:

Bellow is a simple HTTP response with two header lines:

HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 38

<html><body>Hello world!</body></html>

Last update: 2012.

Table of Contents

 About This Book

 JSP (JavaServer Pages) Overview

 Tomcat 7 Installation on Windows Systems

 JSP Scripting Elements

 Java Servlet Introduction

 JSP Implicit Objects

 Syntax of JSP Pages and JSP Documents

 JSP Application Session

 Managing Cookies in JSP Pages

 JavaBean Objects and "useBean" Action Elements

Managing HTTP Response Header Lines

What Is HTTP Response?

 HTTP Response Header Lines

 Controlling Response Header Lines

 Viewing Response Header Lines

 Response Header Lines of Static Files

 Response Header Lines Controlled by "page" Directive

 Response Header Lines Controlled by response Object

 Accessing File System from JSP Pages

 Returning non-HTML Response Body

 Returning Attachments for Web Download

 Non-ASCII Characters Support in JSP Pages

 Performance of JSP Pages

 EL (Expression Language)

 Overview of JSTL (JSP Standard Tag Libraries)

 JSTL Core Library

 JSP Custom Tags

 JSP Java Tag Interface

 Custom Tag Attributes

 Multiple Tags Working Together

 File Upload Test Application

 Outdated Tutorials


 PDF Printing Version