fakecas.blogg.se - Apache tomcat 8 book

HTTP is a pull protocol, a client pulls a page from the server (instead of server pushes pages to the clients).The server then returns a response message to the client. A client sends a request message to the server. HTTP is an asynchronous request-response application-layer protocol.The default port number assigned to HTTP is TCP port 80.

The IP provides support for routing and addressing (via an unique IP address for machines on the Internet) while TCP supports multiplexing via 64K ports from port number 0 to 65535.

HTTP is an application layer protocol runs over TCP/IP.

The client-side program displays the query result on the browser.

The server-side program receives the query parameters, queries the database and returns the query result to the client.

The client-side program sends the query parameters to a server-side program.

The user fills up the query criteria in the form.

A client-side program (such as an HTML form) is loaded into client's browser.

A user, via a web browser (HTTP client), issues a URL request to an HTTP server to start a webapp.

Server-Side Programs: could be written in Java Servlet/JSP, ASP, PHP, Perl, Python, CGI, and others.

Client-Side Programs: could be written in HTML Form, JavaScript, VBScript, Flash, and others.

Database: E.g., Open-source MySQL, Apache Derby, mSQL, SQLite, PostgreSQL, OpenOffice's Base Commercial Oracle, IBM DB2, SAP SyBase, MS SQL Server, MS Access and others.

HTTP Client (or Web Browser): E.g., Internet Explorer (MSIE), FireFox, Chrome, Safari, and others.HTTP Server: E.g., Apache HTTP Server, Apache Tomcat Server, Microsoft Internet Information Server (IIS), nginx, Google Web Server (GWS), and others.Examples of webapps are google, amazon, ebay, facebook and twitter.Ī webapp is typically a 3-tier (or multi-tier) client-server database application run over the Internet as illustrated in the diagram below. Introduction 1.1 Web Application (Webapp)Ī web application (or webapp), unlike standalone application, runs over the Internet.

You can check your JDK version via command " javac -version". If your JDK is below 1.7, upgrade it (See JDK How-To). Take note that Tomcat 8 requires JDK 1.7. This installation and configuration guide is applicable to Tomcat 7 and 8, and possibly the earlier versions. This practical can be completed in a 3-hour session.